Merge branch 'jk/am-retry'

"git am" has a safety feature to prevent it from starting a new
session when there already is a session going.  It reliably
triggers when a mbox is given on the command line, but it has to
rely on the tty-ness of the standard input.  Add an explicit way to
opt out of this safety with a command line option.

* jk/am-retry:
  test-terminal: drop stdin handling
  am: add explicit "--retry" option
diff --git a/.cirrus.yml b/.cirrus.yml
index 4860beb..77346a4 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -1,7 +1,7 @@
 env:
   CIRRUS_CLONE_DEPTH: 1
 
-freebsd_12_task:
+freebsd_task:
   env:
     GIT_PROVE_OPTS: "--timer --jobs 10"
     GIT_TEST_OPTS: "--no-chain-lint --no-bin-wrappers"
@@ -9,7 +9,7 @@
     DEFAULT_TEST_TARGET: prove
     DEVELOPER: 1
   freebsd_instance:
-    image_family: freebsd-12-3
+    image_family: freebsd-13-2
     memory: 2G
   install_script:
     pkg install -y gettext gmake perl5
@@ -19,4 +19,4 @@
   build_script:
     - su git -c gmake
   test_script:
-    - su git -c 'gmake test'
+    - su git -c 'gmake DEFAULT_UNIT_TEST_TARGET=unit-tests-prove test unit-tests'
diff --git a/.editorconfig b/.editorconfig
index f9d8196..15d6cbe 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -4,7 +4,7 @@
 
 # The settings for C (*.c and *.h) files are mirrored in .clang-format.  Keep
 # them in sync.
-[*.{c,h,sh,perl,pl,pm,txt}]
+[{*.{c,h,sh,perl,pl,pm,txt},config.mak.*,Makefile}]
 indent_style = tab
 tab_width = 8
 
diff --git a/.github/workflows/check-whitespace.yml b/.github/workflows/check-whitespace.yml
index a241a63..d0a78fc 100644
--- a/.github/workflows/check-whitespace.yml
+++ b/.github/workflows/check-whitespace.yml
@@ -26,66 +26,7 @@
     - name: git log --check
       id: check_out
       run: |
-        baseSha=${{github.event.pull_request.base.sha}}
-        problems=()
-        commit=
-        commitText=
-        commitTextmd=
-        goodparent=
-        while read dash sha etc
-        do
-          case "${dash}" in
-          "---")
-            if test -z "${commit}"
-            then
-              goodparent=${sha}
-            fi
-            commit="${sha}"
-            commitText="${sha} ${etc}"
-            commitTextmd="[${sha}](https://github.com/${{ github.repository }}/commit/${sha}) ${etc}"
-            ;;
-          "")
-            ;;
-          *)
-            if test -n "${commit}"
-            then
-              problems+=("1) --- ${commitTextmd}")
-              echo ""
-              echo "--- ${commitText}"
-              commit=
-            fi
-            case "${dash}" in
-            *:[1-9]*:) # contains file and line number information
-              dashend=${dash#*:}
-              problems+=("[${dash}](https://github.com/${{ github.repository }}/blob/${{github.event.pull_request.head.ref}}/${dash%%:*}#L${dashend%:}) ${sha} ${etc}")
-              ;;
-            *)
-              problems+=("\`${dash} ${sha} ${etc}\`")
-              ;;
-            esac
-            echo "${dash} ${sha} ${etc}"
-            ;;
-          esac
-        done <<< $(git log --check --pretty=format:"---% h% s" ${baseSha}..)
-
-        if test ${#problems[*]} -gt 0
-        then
-          if test -z "${commit}"
-          then
-            goodparent=${baseSha: 0:7}
-          fi
-          echo "🛑 Please review the Summary output for further information."
-          echo "### :x: A whitespace issue was found in one or more of the commits." >$GITHUB_STEP_SUMMARY
-          echo "" >>$GITHUB_STEP_SUMMARY
-          echo "Run these commands to correct the problem:" >>$GITHUB_STEP_SUMMARY
-          echo "1. \`git rebase --whitespace=fix ${goodparent}\`" >>$GITHUB_STEP_SUMMARY
-          echo "1. \`git push --force\`" >>$GITHUB_STEP_SUMMARY
-          echo " " >>$GITHUB_STEP_SUMMARY
-          echo "Errors:" >>$GITHUB_STEP_SUMMARY
-          for i in "${problems[@]}"
-          do
-            echo "${i}" >>$GITHUB_STEP_SUMMARY
-          done
-
-          exit 2
-        fi
+        ./ci/check-whitespace.sh \
+          "${{github.event.pull_request.base.sha}}" \
+          "$GITHUB_STEP_SUMMARY" \
+          "https://github.com/${{github.repository}}"
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index e5532d3..48341e8 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -38,14 +38,14 @@
       COVERITY_LANGUAGE: cxx
       COVERITY_PLATFORM: overridden-below
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: install minimal Git for Windows SDK
         if: contains(matrix.os, 'windows')
         uses: git-for-windows/setup-git-for-windows-sdk@v1
       - run: ci/install-dependencies.sh
         if: contains(matrix.os, 'ubuntu') || contains(matrix.os, 'macos')
         env:
-          runs_on_pool: ${{ matrix.os }}
+          distro: ${{ matrix.os }}
 
       # The Coverity site says the tool is usually updated twice yearly, so the
       # MD5 of download can be used to determine whether there's been an update.
@@ -98,7 +98,7 @@
       # A cache miss will add ~30s to create, but a cache hit will save minutes.
       - name: restore the Coverity Build Tool
         id: cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: ${{ runner.temp }}/cov-analysis
           key: cov-build-${{ env.COVERITY_LANGUAGE }}-${{ env.COVERITY_PLATFORM }}-${{ steps.lookup.outputs.hash }}
@@ -141,7 +141,7 @@
           esac
       - name: cache the Coverity Build Tool
         if: steps.cache.outputs.cache-hit != 'true'
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           path: ${{ runner.temp }}/cov-analysis
           key: cov-build-${{ env.COVERITY_LANGUAGE }}-${{ env.COVERITY_PLATFORM }}-${{ steps.lookup.outputs.hash }}
diff --git a/.github/workflows/l10n.yml b/.github/workflows/l10n.yml
index 6c38496..e2c3dbd 100644
--- a/.github/workflows/l10n.yml
+++ b/.github/workflows/l10n.yml
@@ -63,9 +63,10 @@
             origin \
             ${{ github.ref }} \
             $args
-      - uses: actions/setup-go@v2
+      - uses: actions/setup-go@v5
         with:
           go-version: '>=1.16'
+          cache: false
       - name: Install git-po-helper
         run: go install github.com/git-l10n/git-po-helper@main
       - name: Install other dependencies
@@ -91,14 +92,13 @@
           cat git-po-helper.out
           exit $exit_code
       - name: Create comment in pull request for report
-        uses: mshick/add-pr-comment@v1
+        uses: mshick/add-pr-comment@v2
         if: >-
           always() &&
           github.event_name == 'pull_request_target' &&
           env.COMMENT_BODY != ''
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          repo-token-user-login: 'github-actions[bot]'
           message: >
             ${{ steps.check-commits.outcome == 'failure' && 'Errors and warnings' || 'Warnings' }}
             found by [git-po-helper](https://github.com/git-l10n/git-po-helper#readme) in workflow
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b40f0e7..13cc0fe 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -159,7 +159,7 @@
       if: failure() && env.FAILED_TEST_ARTIFACTS != ''
       uses: actions/upload-artifact@v4
       with:
-        name: failed-tests-windows
+        name: failed-tests-windows-${{ matrix.nr }}
         path: ${{env.FAILED_TEST_ARTIFACTS}}
   vs-build:
     name: win+VS build
@@ -250,7 +250,7 @@
       if: failure() && env.FAILED_TEST_ARTIFACTS != ''
       uses: actions/upload-artifact@v4
       with:
-        name: failed-tests-windows
+        name: failed-tests-windows-vs-${{ matrix.nr }}
         path: ${{env.FAILED_TEST_ARTIFACTS}}
   regular:
     name: ${{matrix.vector.jobname}} (${{matrix.vector.pool}})
@@ -266,6 +266,9 @@
           - jobname: linux-sha256
             cc: clang
             pool: ubuntu-latest
+          - jobname: linux-reftable
+            cc: clang
+            pool: ubuntu-latest
           - jobname: linux-gcc
             cc: gcc
             cc_package: gcc-8
@@ -277,6 +280,9 @@
           - jobname: osx-clang
             cc: clang
             pool: macos-13
+          - jobname: osx-reftable
+            cc: clang
+            pool: macos-13
           - jobname: osx-gcc
             cc: gcc-13
             pool: macos-13
@@ -286,6 +292,9 @@
           - jobname: linux-leaks
             cc: gcc
             pool: ubuntu-latest
+          - jobname: linux-reftable-leaks
+            cc: gcc
+            pool: ubuntu-latest
           - jobname: linux-asan-ubsan
             cc: clang
             pool: ubuntu-latest
@@ -293,7 +302,7 @@
       CC: ${{matrix.vector.cc}}
       CC_PACKAGE: ${{matrix.vector.cc_package}}
       jobname: ${{matrix.vector.jobname}}
-      runs_on_pool: ${{matrix.vector.pool}}
+      distro: ${{matrix.vector.pool}}
     runs-on: ${{matrix.vector.pool}}
     steps:
     - uses: actions/checkout@v4
@@ -308,6 +317,17 @@
       with:
         name: failed-tests-${{matrix.vector.jobname}}
         path: ${{env.FAILED_TEST_ARTIFACTS}}
+  fuzz-smoke-test:
+    name: fuzz smoke test
+    needs: ci-config
+    if: needs.ci-config.outputs.enabled == 'yes'
+    env:
+      CC: clang
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - run: ci/install-dependencies.sh
+    - run: ci/run-build-and-minimal-fuzzers.sh
   dockerized:
     name: ${{matrix.vector.jobname}} (${{matrix.vector.image}})
     needs: ci-config
@@ -321,12 +341,16 @@
         vector:
         - jobname: linux-musl
           image: alpine
+          distro: alpine-latest
         - jobname: linux32
           image: daald/ubuntu32:xenial
+          distro: ubuntu32-16.04
         - jobname: pedantic
           image: fedora
+          distro: fedora-latest
     env:
       jobname: ${{matrix.vector.jobname}}
+      distro: ${{matrix.vector.distro}}
     runs-on: ubuntu-latest
     container: ${{matrix.vector.image}}
     steps:
@@ -334,7 +358,7 @@
       if: matrix.vector.jobname != 'linux32'
     - uses: actions/checkout@v1 # cannot be upgraded because Node.js Actions aren't supported in this container
       if: matrix.vector.jobname == 'linux32'
-    - run: ci/install-docker-dependencies.sh
+    - run: ci/install-dependencies.sh
     - run: ci/run-build-and-tests.sh
     - name: print test failures
       if: failure() && env.FAILED_TEST_ARTIFACTS != ''
diff --git a/.gitignore b/.gitignore
index 5e56e47..8caf370 100644
--- a/.gitignore
+++ b/.gitignore
@@ -126,6 +126,7 @@
 /git-rebase
 /git-receive-pack
 /git-reflog
+/git-refs
 /git-remote
 /git-remote-http
 /git-remote-https
@@ -135,6 +136,7 @@
 /git-remote-ext
 /git-repack
 /git-replace
+/git-replay
 /git-request-pull
 /git-rerere
 /git-reset
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cd98bcb..37b991e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,10 +7,12 @@
     - if: $CI_COMMIT_TAG
     - if: $CI_COMMIT_REF_PROTECTED == "true"
 
-test:
+test:linux:
   image: $image
+  variables:
+    CUSTOM_PATH: "/custom"
   before_script:
-    - ./ci/install-docker-dependencies.sh
+    - ./ci/install-dependencies.sh
   script:
     - useradd builder --create-home
     - chown -R builder "${CI_PROJECT_DIR}"
@@ -26,6 +28,9 @@
       - jobname: linux-sha256
         image: ubuntu:latest
         CC: clang
+      - jobname: linux-reftable
+        image: ubuntu:latest
+        CC: clang
       - jobname: linux-gcc
         image: ubuntu:20.04
         CC: gcc
@@ -40,6 +45,9 @@
       - jobname: linux-leaks
         image: ubuntu:latest
         CC: gcc
+      - jobname: linux-reftable-leaks
+        image: ubuntu:latest
+        CC: gcc
       - jobname: linux-asan-ubsan
         image: ubuntu:latest
         CC: clang
@@ -51,3 +59,75 @@
     paths:
       - t/failed-test-artifacts
     when: on_failure
+
+test:osx:
+  image: $image
+  tags:
+    - saas-macos-medium-m1
+  variables:
+    TEST_OUTPUT_DIRECTORY: "/Volumes/RAMDisk"
+  before_script:
+    # Create a 4GB RAM disk that we use to store test output on. This small hack
+    # significantly speeds up tests by more than a factor of 2 because the
+    # macOS runners use network-attached storage as disks, which is _really_
+    # slow with the many small writes that our tests do.
+    - sudo diskutil apfs create $(hdiutil attach -nomount ram://8192000) RAMDisk
+    - ./ci/install-dependencies.sh
+  script:
+    - ./ci/run-build-and-tests.sh
+  after_script:
+    - |
+      if test "$CI_JOB_STATUS" != 'success'
+      then
+        ./ci/print-test-failures.sh
+        mv "$TEST_OUTPUT_DIRECTORY"/failed-test-artifacts t/
+      fi
+  parallel:
+    matrix:
+      - jobname: osx-clang
+        image: macos-13-xcode-14
+        CC: clang
+      - jobname: osx-reftable
+        image: macos-13-xcode-14
+        CC: clang
+  artifacts:
+    paths:
+      - t/failed-test-artifacts
+    when: on_failure
+
+test:fuzz-smoke-tests:
+  image: ubuntu:latest
+  variables:
+    CC: clang
+  before_script:
+    - ./ci/install-dependencies.sh
+  script:
+    - ./ci/run-build-and-minimal-fuzzers.sh
+
+static-analysis:
+  image: ubuntu:22.04
+  variables:
+    jobname: StaticAnalysis
+  before_script:
+    - ./ci/install-dependencies.sh
+  script:
+    - ./ci/run-static-analysis.sh
+    - ./ci/check-directional-formatting.bash
+
+check-whitespace:
+  image: ubuntu:latest
+  before_script:
+    - ./ci/install-dependencies.sh
+  script:
+    - ./ci/check-whitespace.sh "$CI_MERGE_REQUEST_TARGET_BRANCH_SHA"
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+
+documentation:
+  image: ubuntu:latest
+  variables:
+    jobname: Documentation
+  before_script:
+    - ./ci/install-dependencies.sh
+  script:
+    - ./ci/test-documentation.sh
diff --git a/.mailmap b/.mailmap
index 82129be..18128a1 100644
--- a/.mailmap
+++ b/.mailmap
@@ -152,6 +152,7 @@
 Lars Doelle <lars.doelle@on-line.de>
 Lars Noschinski <lars@public.noschinski.de> <lars.noschinski@rwth-aachen.de>
 Li Hong <leehong@pku.edu.cn>
+Linus Arver <linus@ucla.edu> <linusa@google.com>
 Linus Torvalds <torvalds@linux-foundation.org> <torvalds@evo.osdl.org>
 Linus Torvalds <torvalds@linux-foundation.org> <torvalds@g5.osdl.org>
 Linus Torvalds <torvalds@linux-foundation.org> <torvalds@osdl.org>
diff --git a/Documentation/CodingGuidelines b/Documentation/CodingGuidelines
index 578587a..1d92b2d 100644
--- a/Documentation/CodingGuidelines
+++ b/Documentation/CodingGuidelines
@@ -188,6 +188,22 @@
    hopefully nobody starts using "local" before they are reimplemented
    in C ;-)
 
+ - Some versions of shell do not understand "export variable=value",
+   so we write "variable=value" and then "export variable" on two
+   separate lines.
+
+ - Some versions of dash have broken variable assignment when prefixed
+   with "local", "export", and "readonly", in that the value to be
+   assigned goes through field splitting at $IFS unless quoted.
+
+	(incorrect)
+	local variable=$value
+	local variable=$(command args)
+
+	(correct)
+	local variable="$value"
+	local variable="$(command args)"
+
  - Use octal escape sequences (e.g. "\302\242"), not hexadecimal (e.g.
    "\xc2\xa2") in printf format strings, since hexadecimal escape
    sequences are not portable.
@@ -446,12 +462,41 @@
    detail.
 
  - The first #include in C files, except in platform specific compat/
-   implementations and sha1dc/, must be either "git-compat-util.h" or
-   one of the approved headers that includes it first for you.  (The
-   approved headers currently include "builtin.h",
-   "t/helper/test-tool.h", "xdiff/xinclude.h", or
-   "reftable/system.h".)  You do not have to include more than one of
-   these.
+   implementations and sha1dc/, must be <git-compat-util.h>.  This
+   header file insulates other header files and source files from
+   platform differences, like which system header files must be
+   included in what order, and what C preprocessor feature macros must
+   be defined to trigger certain features we expect out of the system.
+   A collorary to this is that C files should not directly include
+   system header files themselves.
+
+   There are some exceptions, because certain group of files that
+   implement an API all have to include the same header file that
+   defines the API and it is convenient to include <git-compat-util.h>
+   there.  Namely:
+
+   - the implementation of the built-in commands in the "builtin/"
+     directory that include "builtin.h" for the cmd_foo() prototype
+     definition,
+
+   - the test helper programs in the "t/helper/" directory that include
+     "t/helper/test-tool.h" for the cmd__foo() prototype definition,
+
+   - the xdiff implementation in the "xdiff/" directory that includes
+     "xdiff/xinclude.h" for the xdiff machinery internals,
+
+   - the unit test programs in "t/unit-tests/" directory that include
+     "t/unit-tests/test-lib.h" that gives them the unit-tests
+     framework, and
+
+   - the source files that implement reftable in the "reftable/"
+     directory that include "reftable/system.h" for the reftable
+     internals,
+
+   are allowed to assume that they do not have to include
+   <git-compat-util.h> themselves, as it is included as the first
+   '#include' in these header files.  These headers must be the first
+   header file to be "#include"d in them, though.
 
  - A C file must directly include the header files that declare the
    functions and the types it uses, except for the functions and types
@@ -612,15 +657,15 @@
   - Prefer succinctness and matter-of-factly describing functionality
     in the abstract.  E.g.
 
-     --short:: Emit output in the short-format.
+     `--short`:: Emit output in the short-format.
 
     and avoid something like these overly verbose alternatives:
 
-     --short:: Use this to emit output in the short-format.
-     --short:: You can use this to get output in the short-format.
-     --short:: A user who prefers shorter output could....
-     --short:: Should a person and/or program want shorter output, he
-               she/they/it can...
+     `--short`:: Use this to emit output in the short-format.
+     `--short`:: You can use this to get output in the short-format.
+     `--short`:: A user who prefers shorter output could....
+     `--short`:: Should a person and/or program want shorter output, he
+                 she/they/it can...
 
     This practice often eliminates the need to involve human actors in
     your description, but it is a good practice regardless of the
@@ -630,12 +675,12 @@
     addressing the hypothetical user, and possibly "we" when
     discussing how the program might react to the user.  E.g.
 
-      You can use this option instead of --xyz, but we might remove
+      You can use this option instead of `--xyz`, but we might remove
       support for it in future versions.
 
     while keeping in mind that you can probably be less verbose, e.g.
 
-      Use this instead of --xyz. This option might be removed in future
+      Use this instead of `--xyz`. This option might be removed in future
       versions.
 
   - If you still need to refer to an example person that is
@@ -653,80 +698,12 @@
  The same general rule as for code applies -- imitate the existing
  conventions.
 
- A few commented examples follow to provide reference when writing or
- modifying command usage strings and synopsis sections in the manual
- pages:
 
- Placeholders are spelled in lowercase and enclosed in angle brackets:
-   <file>
-   --sort=<key>
-   --abbrev[=<n>]
+Markup:
 
- If a placeholder has multiple words, they are separated by dashes:
-   <new-branch-name>
-   --template=<template-directory>
-
- Possibility of multiple occurrences is indicated by three dots:
-   <file>...
-   (One or more of <file>.)
-
- Optional parts are enclosed in square brackets:
-   [<file>...]
-   (Zero or more of <file>.)
-
-   --exec-path[=<path>]
-   (Option with an optional argument.  Note that the "=" is inside the
-   brackets.)
-
-   [<patch>...]
-   (Zero or more of <patch>.  Note that the dots are inside, not
-   outside the brackets.)
-
- Multiple alternatives are indicated with vertical bars:
-   [-q | --quiet]
-   [--utf8 | --no-utf8]
-
- Use spacing around "|" token(s), but not immediately after opening or
- before closing a [] or () pair:
-   Do: [-q | --quiet]
-   Don't: [-q|--quiet]
-
- Don't use spacing around "|" tokens when they're used to separate the
- alternate arguments of an option:
-    Do: --track[=(direct|inherit)]
-    Don't: --track[=(direct | inherit)]
-
- Parentheses are used for grouping:
-   [(<rev> | <range>)...]
-   (Any number of either <rev> or <range>.  Parens are needed to make
-   it clear that "..." pertains to both <rev> and <range>.)
-
-   [(-p <parent>)...]
-   (Any number of option -p, each with one <parent> argument.)
-
-   git remote set-head <name> (-a | -d | <branch>)
-   (One and only one of "-a", "-d" or "<branch>" _must_ (no square
-   brackets) be provided.)
-
- And a somewhat more contrived example:
-   --diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]
-   Here "=" is outside the brackets, because "--diff-filter=" is a
-   valid usage.  "*" has its own pair of brackets, because it can
-   (optionally) be specified only when one or more of the letters is
-   also provided.
-
-  A note on notation:
-   Use 'git' (all lowercase) when talking about commands i.e. something
-   the user would type into a shell and use 'Git' (uppercase first letter)
-   when talking about the version control system and its properties.
-
- A few commented examples follow to provide reference when writing or
- modifying paragraphs or option/command explanations that contain options
- or commands:
-
- Literal examples (e.g. use of command-line options, command names,
+ Literal parts (e.g. use of command-line options, command names,
  branch names, URLs, pathnames (files and directories), configuration and
- environment variables) must be typeset in monospace (i.e. wrapped with
+ environment variables) must be typeset as verbatim (i.e. wrapped with
  backticks):
    `--pretty=oneline`
    `git rev-list`
@@ -735,6 +712,7 @@
    `.git/config`
    `GIT_DIR`
    `HEAD`
+   `umask`(2)
 
  An environment variable must be prefixed with "$" only when referring to its
  value and not when referring to the variable itself, in this case there is
@@ -751,6 +729,97 @@
    Incorrect:
       `\--pretty=oneline`
 
+ Placeholders are spelled in lowercase and enclosed in
+ angle brackets surrounded by underscores:
+   _<file>_
+   _<commit>_
+
+ If a placeholder has multiple words, they are separated by dashes:
+   _<new-branch-name>_
+   _<template-directory>_
+
+ A placeholder is not enclosed in backticks, as it is not a literal.
+
+ When needed, use a distinctive identifier for placeholders, usually
+ made of a qualification and a type:
+   _<git-dir>_
+   _<key-id>_
+
+ When literal and placeholders are mixed, each markup is applied for
+ each sub-entity. If they are stuck, a special markup, called
+ unconstrained formatting is required.
+ Unconstrained formating for placeholders is __<like-this>__
+ Unconstrained formatting for literal formatting is ++like this++
+   `--jobs` _<n>_
+   ++--sort=++__<key>__
+   __<directory>__++/.git++
+   ++remote.++__<name>__++.mirror++
+
+ caveat: ++ unconstrained format is not verbatim and may expand
+ content. Use Asciidoc escapes inside them.
+
+Synopsis Syntax
+
+ Syntax grammar is formatted neither as literal nor as placeholder.
+
+ A few commented examples follow to provide reference when writing or
+ modifying command usage strings and synopsis sections in the manual
+ pages:
+
+ Possibility of multiple occurrences is indicated by three dots:
+   _<file>_...
+   (One or more of <file>.)
+
+ Optional parts are enclosed in square brackets:
+   [_<file>_...]
+   (Zero or more of <file>.)
+
+   ++--exec-path++[++=++__<path>__]
+   (Option with an optional argument.  Note that the "=" is inside the
+   brackets.)
+
+   [_<patch>_...]
+   (Zero or more of <patch>.  Note that the dots are inside, not
+   outside the brackets.)
+
+ Multiple alternatives are indicated with vertical bars:
+   [`-q` | `--quiet`]
+   [`--utf8` | `--no-utf8`]
+
+ Use spacing around "|" token(s), but not immediately after opening or
+ before closing a [] or () pair:
+   Do: [`-q` | `--quiet`]
+   Don't: [`-q`|`--quiet`]
+
+ Don't use spacing around "|" tokens when they're used to separate the
+ alternate arguments of an option:
+    Do: ++--track++[++=++(`direct`|`inherit`)]`
+    Don't: ++--track++[++=++(`direct` | `inherit`)]
+
+ Parentheses are used for grouping:
+   [(_<rev>_ | _<range>_)...]
+   (Any number of either <rev> or <range>.  Parens are needed to make
+   it clear that "..." pertains to both <rev> and <range>.)
+
+   [(`-p` _<parent>_)...]
+   (Any number of option -p, each with one <parent> argument.)
+
+   `git remote set-head` _<name>_ (`-a` | `-d` | _<branch>_)
+   (One and only one of "-a", "-d" or "<branch>" _must_ (no square
+   brackets) be provided.)
+
+ And a somewhat more contrived example:
+   `--diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]`
+   Here "=" is outside the brackets, because "--diff-filter=" is a
+   valid usage.  "*" has its own pair of brackets, because it can
+   (optionally) be specified only when one or more of the letters is
+   also provided.
+
+  A note on notation:
+   Use 'git' (all lowercase) when talking about commands i.e. something
+   the user would type into a shell and use 'Git' (uppercase first letter)
+   when talking about the version control system and its properties.
+
  If some place in the documentation needs to typeset a command usage
  example with inline substitutions, it is fine to use +monospaced and
  inline substituted text+ instead of `monospaced literal text`, and with
diff --git a/Documentation/DecisionMaking.txt b/Documentation/DecisionMaking.txt
new file mode 100644
index 0000000..dbb4c1f
--- /dev/null
+++ b/Documentation/DecisionMaking.txt
@@ -0,0 +1,74 @@
+Decision-Making Process in the Git Project
+==========================================
+
+Introduction
+------------
+This document describes the current decision-making process in the Git
+project. It is a descriptive rather than prescriptive doc; that is, we want to
+describe how things work in practice rather than explicitly recommending any
+particular process or changes to the current process.
+
+Here we document how the project makes decisions for discussions
+(with or without patches), in scale larger than an individual patch
+series (which is fully covered by the SubmittingPatches document).
+
+
+Larger Discussions (with patches)
+---------------------------------
+As with discussions on an individual patch series, starting a larger-scale
+discussion often begins by sending a patch or series to the list. This might
+take the form of an initial design doc, with implementation following in later
+iterations of the series (for example,
+link:https://lore.kernel.org/git/0169ce6fb9ccafc089b74ae406db0d1a8ff8ac65.1688165272.git.steadmon@google.com/[adding unit tests] or
+link:https://lore.kernel.org/git/20200420235310.94493-1-emilyshaffer@google.com/[config-based hooks]),
+or it might include a full implementation from the beginning.
+In either case, discussion progresses the same way for an individual patch series,
+until consensus is reached or the topic is dropped.
+
+
+Larger Discussions (without patches)
+------------------------------------
+Occasionally, larger discussions might occur without an associated patch series.
+These may be very large-scale technical decisions that are beyond the scope of
+even a single large patch series, or they may be more open-ended,
+policy-oriented discussions (examples:
+link:https://lore.kernel.org/git/ZZ77NQkSuiRxRDwt@nand.local/[introducing Rust]
+or link:https://lore.kernel.org/git/YHofmWcIAidkvJiD@google.com/[improving submodule UX]).
+In either case, discussion progresses as described above for general patch series.
+
+For larger discussions without a patch series or other concrete implementation,
+it may be hard to judge when consensus has been reached, as there are not any
+official guidelines. If discussion stalls at this point, it may be helpful to
+restart discussion with an RFC patch series (such as a partial, unfinished
+implementation or proof of concept) that can be more easily debated.
+
+When consensus is reached that it is a good idea, the original
+proposer is expected to coordinate the effort to make it happen,
+with help from others who were involved in the discussion, as
+needed.
+
+For decisions that require code changes, it is often the case that the original
+proposer will follow up with a patch series, although it is also common for
+other interested parties to provide an implementation (or parts of the
+implementation, for very large changes).
+
+For non-technical decisions such as community norms or processes, it is up to
+the community as a whole to implement and sustain agreed-upon changes.
+The project leadership committe (PLC) may help the implementation of
+policy decisions.
+
+
+Other Discussion Venues
+-----------------------
+Occasionally decision proposals are presented off-list, e.g. at the semi-regular
+Contributors' Summit. While higher-bandwidth face-to-face discussion is often
+useful for quickly reaching consensus among attendees, generally we expect to
+summarize the discussion in notes that can later be presented on-list. For an
+example, see the thread
+link:https://lore.kernel.org/git/AC2EB721-2979-43FD-922D-C5076A57F24B@jramsay.com.au/[Notes
+from Git Contributor Summit, Los Angeles (April 5, 2020)] by James Ramsay.
+
+We prefer that "official" discussion happens on the list so that the full
+community has opportunity to engage in discussion. This also means that the
+mailing list archives contain a more-or-less complete history of project
+discussions and decisions.
diff --git a/Documentation/Makefile b/Documentation/Makefile
index b629176..a3868a4 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -103,6 +103,7 @@
 API_DOCS = $(patsubst %.txt,%,$(filter-out technical/api-index-skel.txt technical/api-index.txt, $(wildcard technical/api-*.txt)))
 SP_ARTICLES += $(API_DOCS)
 
+TECH_DOCS += DecisionMaking
 TECH_DOCS += ReviewingGuidelines
 TECH_DOCS += MyFirstContribution
 TECH_DOCS += MyFirstObjectWalk
@@ -122,6 +123,7 @@
 TECH_DOCS += technical/send-pack-pipeline
 TECH_DOCS += technical/shallow
 TECH_DOCS += technical/trivial-merge
+TECH_DOCS += technical/unit-tests
 SP_ARTICLES += $(TECH_DOCS)
 SP_ARTICLES += technical/api-index
 
@@ -483,12 +485,16 @@
 
 lint-docs-fsck-msgids: $(LINT_DOCS_FSCK_MSGIDS)
 
+lint-docs-manpages:
+	$(QUIET_GEN)./lint-manpages.sh
+
 ## Lint: list of targets above
 .PHONY: lint-docs
 lint-docs: lint-docs-fsck-msgids
 lint-docs: lint-docs-gitlink
 lint-docs: lint-docs-man-end-blurb
 lint-docs: lint-docs-man-section-order
+lint-docs: lint-docs-manpages
 
 ifeq ($(wildcard po/Makefile),po/Makefile)
 doc-l10n install-l10n::
diff --git a/Documentation/MyFirstContribution.txt b/Documentation/MyFirstContribution.txt
index f06563e..e41654c 100644
--- a/Documentation/MyFirstContribution.txt
+++ b/Documentation/MyFirstContribution.txt
@@ -1116,6 +1116,15 @@
 NOTE: Check `git help send-email` for some other options which you may find
 valuable, such as changing the Reply-to address or adding more CC and BCC lines.
 
+:contrib-scripts: footnoteref:[contrib-scripts,Scripts under `contrib/` are +
+not part of the core `git` binary and must be called directly. Clone the Git +
+codebase and run `perl contrib/contacts/git-contacts`.]
+
+NOTE: If you're not sure whom to CC, running `contrib/contacts/git-contacts` can
+list potential reviewers. In addition, you can do `git send-email
+--cc-cmd='perl contrib/contacts/git-contacts' feature/*.patch`{contrib-scripts} to
+automatically pass this list of emails to `send-email`.
+
 NOTE: When you are sending a real patch, it will go to git@vger.kernel.org - but
 please don't send your patchset from the tutorial to the real mailing list! For
 now, you can send it to yourself, to make sure you understand how it will look.
diff --git a/Documentation/MyFirstObjectWalk.txt b/Documentation/MyFirstObjectWalk.txt
index c68cdb1..dec8afe 100644
--- a/Documentation/MyFirstObjectWalk.txt
+++ b/Documentation/MyFirstObjectWalk.txt
@@ -210,13 +210,14 @@
 
 ...
 
-static int git_walken_config(const char *var, const char *value, void *cb)
+static int git_walken_config(const char *var, const char *value,
+			     const struct config_context *ctx, void *cb)
 {
 	/*
 	 * For now, we don't have any custom configuration, so fall back to
 	 * the default config.
 	 */
-	return git_default_config(var, value, cb);
+	return git_default_config(var, value, ctx, cb);
 }
 ----
 
@@ -389,10 +390,11 @@
 First some setup. Add `grep_config()` to `git_walken_config()`:
 
 ----
-static int git_walken_config(const char *var, const char *value, void *cb)
+static int git_walken_config(const char *var, const char *value,
+			     const struct config_context *ctx, void *cb)
 {
-	grep_config(var, value, cb);
-	return git_default_config(var, value, cb);
+	grep_config(var, value, ctx, cb);
+	return git_default_config(var, value, ctx, cb);
 }
 ----
 
@@ -523,7 +525,7 @@
 
 We can base our work on an example. `git pack-objects` prepares all kinds of
 objects for packing into a bitmap or packfile. The work we are interested in
-resides in `builtins/pack-objects.c:get_object_list()`; examination of that
+resides in `builtin/pack-objects.c:get_object_list()`; examination of that
 function shows that the all-object walk is being performed by
 `traverse_commit_list()` or `traverse_commit_list_filtered()`. Those two
 functions reside in `list-objects.c`; examining the source shows that, despite
@@ -732,8 +734,8 @@
 	} else {
 		trace_printf(
 			_("Filtered object walk with filterspec 'tree:1'.\n"));
-		CALLOC_ARRAY(rev->filter, 1);
-		parse_list_objects_filter(rev->filter, "tree:1");
+
+		parse_list_objects_filter(&rev->filter, "tree:1");
 	}
 	traverse_commit_list(rev, walken_show_commit,
 			     walken_show_object, NULL);
@@ -752,10 +754,12 @@
 === Counting Omitted Objects
 
 We also have the capability to enumerate all objects which were omitted by a
-filter, like with `git log --filter=<spec> --filter-print-omitted`. Asking
-`traverse_commit_list_filtered()` to populate the `omitted` list means that our
-object walk does not perform any better than an unfiltered object walk; all
-reachable objects are walked in order to populate the list.
+filter, like with `git log --filter=<spec> --filter-print-omitted`. To do this,
+change `traverse_commit_list()` to `traverse_commit_list_filtered()`, which is
+able to populate an `omitted` list.  Asking for this list of filtered objects
+may cause performance degradations, however, because in this case, despite
+filtering objects, the possibly much larger set of all reachable objects must
+be processed in order to populate that list.
 
 First, add the `struct oidset` and related items we will use to iterate it:
 
@@ -776,8 +780,9 @@
 	...
 ----
 
-Modify the call to `traverse_commit_list_filtered()` to include your `omitted`
-object:
+Replace the call to `traverse_commit_list()` with
+`traverse_commit_list_filtered()` and pass a pointer to the `omitted` oidset
+defined and initialized above:
 
 ----
 	...
@@ -843,7 +848,7 @@
 With only that change, run again (but save yourself some scrollback):
 
 ----
-$ GIT_TRACE=1 ./bin-wrappers/git walken | head -n 10
+$ GIT_TRACE=1 ./bin-wrappers/git walken 2>&1 | head -n 10
 ----
 
 Take a look at the top commit with `git show` and the object ID you printed; it
@@ -871,7 +876,7 @@
 
 ----
 $ make
-$ GIT_TRACE=1 ./bin-wrappers git walken | tail -n 10
+$ GIT_TRACE=1 ./bin-wrappers/git walken 2>&1 | tail -n 10
 ----
 
 The last commit object given should have the same OID as the one we saw at the
diff --git a/Documentation/RelNotes/2.44.0.txt b/Documentation/RelNotes/2.44.0.txt
new file mode 100644
index 0000000..14f9ce8
--- /dev/null
+++ b/Documentation/RelNotes/2.44.0.txt
@@ -0,0 +1,334 @@
+Git v2.44 Release Notes
+=======================
+
+Backward Compatibility Notes
+
+ * "git checkout -B <branch>" used to allow switching to a branch that
+   is in use on another worktree, but this was by mistake.  The users
+   need to use "--ignore-other-worktrees" option.
+
+
+UI, Workflows & Features
+
+ * "git add" and "git stash" learned to support the ":(attr:...)"
+   magic pathspec.
+
+ * "git rebase --autosquash" is now enabled for non-interactive rebase,
+   but it is still incompatible with the apply backend.
+
+ * Introduce "git replay", a tool meant on the server side without
+   working tree to recreate a history.
+
+ * "git merge-file" learned to take the "--diff-algorithm" option to
+   use algorithm different from the default "myers" diff.
+
+ * Command line completion (in contrib/) learned to complete path
+   arguments to the "add/set" subcommands of "git sparse-checkout"
+   better.
+
+ * "git checkout -B <branch> [<start-point>]" allowed a branch that is
+   in use in another worktree to be updated and checked out, which
+   might be a bit unexpected.  The rule has been tightened, which is a
+   breaking change.  "--ignore-other-worktrees" option is required to
+   unbreak you, if you are used to the current behaviour that "-B"
+   overrides the safety.
+
+ * The builtin_objectmode attribute is populated for each path
+   without adding anything in .gitattributes files, which would be
+   useful in magic pathspec, e.g., ":(attr:builtin_objectmode=100755)"
+   to limit to executables.
+
+ * "git fetch" learned to pay attention to "fetch.all" configuration
+   variable, which pretends as if "--all" was passed from the command
+   line when no remote parameter was given.
+
+ * In addition to (rather cryptic) Security Identifiers, show username
+   and domain in the error message when we barf on mismatch between
+   the Git directory and the current user on Windows.
+
+ * The error message given when "git branch -d branch" fails due to
+   commits unique to the branch has been split into an error and a new
+   conditional advice message.
+
+ * When given an existing but unreadable file as a configuration file,
+   gitweb behaved as if the file did not exist at all, but now it
+   errors out.  This is a change that may break backward compatibility.
+
+ * When $HOME/.gitconfig is missing but XDG config file is available, we
+   should write into the latter, not former.  "git gc" and "git
+   maintenance" wrote into a wrong "global config" file, which have
+   been corrected.
+
+ * Define "special ref" as a very narrow set that consists of
+   FETCH_HEAD and MERGE_HEAD, and clarify everything else that used to
+   be classified as such are actually just pseudorefs.
+
+ * All conditional "advice" messages show how to turn them off, which
+   becomes repetitive.  Setting advice.* configuration explicitly on
+   now omits the instruction part.
+
+ * The "disable repository discovery of a bare repository" check,
+   triggered by setting safe.bareRepository configuration variable to
+   'explicit', has been loosened to exclude the ".git/" directory inside
+   a non-bare repository from the check.  So you can do "cd .git &&
+   git cmd" to run a Git command that works on a bare repository without
+   explicitly specifying $GIT_DIR now.
+
+ * The completion script (in contrib/) learned more options that can
+   be used with "git log".
+
+ * The labels on conflict markers for the common ancestor, our version,
+   and the other version are available to custom 3-way merge driver
+   via %S, %X, and %Y placeholders.
+
+ * The write codepath for the reftable data learned to honor
+   core.fsync configuration.
+
+ * The "--fsck-objects" option of "git index-pack" now can take the
+   optional parameter to tweak severity of different fsck errors.
+
+ * The wincred credential backend has been taught to support oauth
+   refresh token the same way as credential-cache and
+   credential-libsecret backends.
+
+ * Command line completion support (in contrib/) has been
+   updated for "git bisect".
+
+ * "git branch" and friends learned to use the formatted text as
+   sorting key, not the underlying timestamp value, when the --sort
+   option is used with author or committer timestamp with a format
+   specifier (e.g., "--sort=creatordate:format:%H:%M:%S").
+
+ * The command line completion script (in contrib/) learned to
+   complete configuration variable names better.
+
+
+Performance, Internal Implementation, Development Support etc.
+
+ * Process to add some form of low-level unit tests has started.
+
+ * Add support for GitLab CI.
+
+ * "git for-each-ref --no-sort" still sorted the refs alphabetically
+   which paid non-trivial cost.  It has been redefined to show output
+   in an unspecified order, to allow certain optimizations to take
+   advantage of.
+
+ * Simplify API implementation to delete references by eliminating
+   duplication.
+
+ * Subject approxidate() and show_date() machinery to OSS-Fuzz.
+
+ * A new helper to let us pretend that we called lstat() when we know
+   our cache_entry is up-to-date via fsmonitor.
+
+ * The optimization based on fsmonitor in the "diff --cached"
+   codepath is resurrected with the "fake-lstat" introduced earlier.
+
+ * Test balloon to use C99 "bool" type from <stdbool.h> has been
+   added.
+
+ * "git clone" has been prepared to allow cloning a repository with
+   non-default hash function into a repository that uses the reftable
+   backend.
+
+ * Streaming spans of packfile data used to be done only from a
+   single, primary, pack in a repository with multiple packfiles.  It
+   has been extended to allow reuse from other packfiles, too.
+
+ * Comment updates to help developers not to attempt to modify
+   messages from plumbing commands that must stay constant.
+
+   It might make sense to reassess the plumbing needs every few years,
+   but that should be done as a separate effort.
+
+ * Move test-ctype helper to the unit-test framework.
+
+ * Instead of manually creating refs/ hierarchy on disk upon a
+   creation of a secondary worktree, which is only usable via the
+   files backend, use the refs API to populate it.
+
+ * CI for GitLab learned to drive macOS jobs.
+
+ * A few tests to "git commit -o <pathspec>" and "git commit -i
+   <pathspec>" has been added.
+
+ * Tests on ref API are moved around to prepare for reftable.
+
+ * The Makefile often had to say "-L$(path) -R$(path)" that repeats
+   the path to the same library directory for link time and runtime.
+   A Makefile template is used to reduce such repetition.
+
+ * The priority queue test has been migrated to the unit testing
+   framework.
+
+ * Setting `feature.experimental` opts the user into multi-pack reuse
+   experiment
+
+ * Squelch node.js 16 deprecation warnings from GitHub Actions CI
+   by updating actions/github-script and actions/checkout that use
+   node.js 20.
+
+ * The mechanism to report the filename in the source code, used by
+   the unit-test machinery, assumed that the compiler expanded __FILE__
+   to the path to the source given to the $(CC), but some compilers
+   give full path, breaking the output.  This has been corrected.
+
+
+Fixes since v2.43
+-----------------
+
+ * The way CI testing used "prove" could lead to running the test
+   suite twice needlessly, which has been corrected.
+
+ * Update ref-related tests.
+
+ * "git format-patch --encode-email-headers" ignored the option when
+   preparing the cover letter, which has been corrected.
+
+ * Newer versions of Getopt::Long started giving warnings against our
+   (ab)use of it in "git send-email".  Bump the minimum version
+   requirement for Perl to 5.8.1 (from September 2002) to allow
+   simplifying our implementation.
+
+ * Earlier we stopped relying on commit-graph that (still) records
+   information about commits that are lost from the object store,
+   which has negative performance implications.  The default has been
+   flipped to disable this pessimization.
+
+ * Stale URLs have been updated to their current counterparts (or
+   archive.org) and HTTP links are replaced with working HTTPS links.
+
+ * trace2 streams used to record the URLs that potentially embed
+   authentication material, which has been corrected.
+
+ * The sample pre-commit hook that tries to catch introduction of new
+   paths that use potentially non-portable characters did not notice
+   an existing path getting renamed to such a problematic path, when
+   rename detection was enabled.
+
+ * The command line parser for the "log" family of commands was too
+   loose when parsing certain numbers, e.g., silently ignoring the
+   extra 'q' in "git log -n 1q" without complaining, which has been
+   tightened up.
+
+ * "git $cmd --end-of-options --rev -- --path" for some $cmd failed
+   to interpret "--rev" as a rev, and "--path" as a path.  This was
+   fixed for many programs like "reset" and "checkout".
+
+ * "git bisect reset" has been taught to clean up state files and refs
+   even when BISECT_START file is gone.
+
+ * Some codepaths did not correctly parse configuration variables
+   specified with valueless "true", which has been corrected.
+
+ * Code clean-up for sanity checking of command line options for "git
+   show-ref".
+
+ * The code to parse the From e-mail header has been updated to avoid
+   recursion.
+
+ * "git fetch --atomic" issued an unnecessary empty error message,
+   which has been corrected.
+
+ * Command line completion script (in contrib/) learned to work better
+   with the reftable backend.
+
+ * "git status" is taught to show both the branch being bisected and
+   being rebased when both are in effect at the same time.
+
+ * "git archive --list extra garbage" silently ignored excess command
+   line parameters, which has been corrected.
+
+ * "git sparse-checkout set" added default patterns even when the
+   patterns are being fed from the standard input, which has been
+   corrected.
+
+ * "git sparse-checkout (add|set) --[no-]cone --end-of-options" did
+   not handle "--end-of-options" correctly after a recent update.
+
+ * Unlike other environment variables that took the usual
+   true/false/yes/no as well as 0/1, GIT_FLUSH only understood 0/1,
+   which has been corrected.
+
+ * Clearing in-core repository (happens during e.g., "git fetch
+   --recurse-submodules" with commit graph enabled) made in-core
+   commit object in an inconsistent state by discarding the necessary
+   data from commit-graph too early, which has been corrected.
+
+ * Update to a new feature recently added, "git show-ref --exists".
+
+ * oss-fuzz tests are built and run in CI.
+   (merge c4a9cf1df3 js/oss-fuzz-build-in-ci later to maint).
+
+ * Rename detection logic ignored the final line of a file if it is an
+   incomplete line.
+
+ * GitHub CI update.
+   (merge 0188b2c8e0 pb/ci-github-skip-logs-for-broken-tests later to maint).
+
+ * "git diff --no-rename A B" did not disable rename detection but did
+   not trigger an error from the command line parser.
+
+ * "git archive --remote=<remote>" learned to talk over the smart
+   http (aka stateless) transport.
+   (merge 176cd68634 jx/remote-archive-over-smart-http later to maint).
+
+ * Fetching via protocol v0 over Smart HTTP transport sometimes failed
+   to correctly auto-follow tags.
+   (merge fba732c462 jk/fetch-auto-tag-following-fix later to maint).
+
+ * The documentation for the --exclude-per-directory option marked it
+   as deprecated, which confused readers into thinking there may be a
+   plan to remove it in the future, which was not our intention.
+   (merge 0009542cab jc/ls-files-doc-update later to maint).
+
+ * "git diff --no-index file1 file2" segfaulted while invoking the
+   external diff driver, which has been corrected.
+
+ * Rewrite //-comments to /* comments */ in files whose comments
+   prevalently use the latter.
+
+ * Cirrus CI jobs started breaking because we specified version of
+   FreeBSD that is no longer available, which has been corrected.
+   (merge 81fffb66d3 cb/use-freebsd-13-2-at-cirrus-ci later to maint).
+
+ * A caller called index_file_exists() that takes a string expressed
+   as <ptr, length> with a wrong length, which has been corrected.
+   (merge 156e28b36d jh/sparse-index-expand-to-path-fix later to maint).
+
+ * A failed "git tag -s" did not necessarily result in an error
+   depending on the crypto backend, which has been corrected.
+
+ * "git stash" sometimes was silent even when it failed due to
+   unwritable index file, which has been corrected.
+
+ * "git show-ref --verify" did not show things like "CHERRY_PICK_HEAD",
+   which has been corrected.
+
+ * Recent conversion to allow more than 0/1 in GIT_FLUSH broke the
+   mechanism by flipping what yes/no means by mistake, which has been
+   corrected.
+
+ * The sequencer machinery does not use the ref API and instead
+   records names of certain objects it needs for its correct operation
+   in temporary files, which makes these objects susceptible to loss
+   by garbage collection.  These temporary files have been added as
+   starting points for reachability analysis to fix this.
+   (merge bc7f5db896 pw/gc-during-rebase later to maint).
+
+ * "git cherry-pick" invoked during "git rebase -i" session lost
+   the authorship information, which has been corrected.
+   (merge e4301f73ff vn/rebase-with-cherry-pick-authorship later to maint).
+
+ * The code paths that call repo_read_object_file() have been
+   tightened to react to errors.
+   (merge 568459bf5e js/check-null-from-read-object-file later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+   (merge 5aea3955bc rj/clarify-branch-doc-m later to maint).
+   (merge 9cce3be2df bk/bisect-doc-fix later to maint).
+   (merge 8430b438f6 vd/fsck-submodule-url-test later to maint).
+   (merge 3cb4384683 jc/t0091-with-unknown-git later to maint).
+   (merge 020456cb74 rs/receive-pack-remove-find-header later to maint).
+   (merge bc47139f4f la/trailer-cleanups later to maint).
diff --git a/Documentation/RelNotes/2.44.1.txt b/Documentation/RelNotes/2.44.1.txt
new file mode 100644
index 0000000..b5135c3
--- /dev/null
+++ b/Documentation/RelNotes/2.44.1.txt
@@ -0,0 +1,8 @@
+Git v2.44.1 Release Notes
+=========================
+
+This release merges up the fix that appears in v2.39.4, v2.40.2,
+v2.41.1, v2.42.2 and v2.43.4 to address the security issues
+CVE-2024-32002, CVE-2024-32004, CVE-2024-32020, CVE-2024-32021
+and CVE-2024-32465; see the release notes for these versions
+for details.
diff --git a/Documentation/RelNotes/2.44.2.txt b/Documentation/RelNotes/2.44.2.txt
new file mode 100644
index 0000000..76700f0
--- /dev/null
+++ b/Documentation/RelNotes/2.44.2.txt
@@ -0,0 +1,26 @@
+Git v2.44.2 Release Notes
+=========================
+
+In preparing security fixes for four CVEs, we made overly aggressive
+"defense in depth" changes that broke legitimate use cases like 'git
+lfs' and 'git annex.'  This release is to revert these misguided, if
+well-intentioned, changes that were shipped in 2.44.1 and were not
+direct security fixes.
+
+Jeff King (5):
+      send-email: drop FakeTerm hack
+      send-email: avoid creating more than one Term::ReadLine object
+      ci: drop mention of BREW_INSTALL_PACKAGES variable
+      ci: avoid bare "gcc" for osx-gcc job
+      ci: stop installing "gcc-13" for osx-gcc
+
+Johannes Schindelin (6):
+      hook: plug a new memory leak
+      init: use the correct path of the templates directory again
+      Revert "core.hooksPath: add some protection while cloning"
+      tests: verify that `clone -c core.hooksPath=/dev/null` works again
+      clone: drop the protections where hooks aren't run
+      Revert "Add a helper function to compare file contents"
+
+Junio C Hamano (1):
+      Revert "fsck: warn about symlink pointing inside a gitdir"
diff --git a/Documentation/RelNotes/2.45.0.txt b/Documentation/RelNotes/2.45.0.txt
new file mode 100644
index 0000000..fec1936
--- /dev/null
+++ b/Documentation/RelNotes/2.45.0.txt
@@ -0,0 +1,476 @@
+Git v2.45 Release Notes
+=======================
+
+Backward Compatibility Notes
+
+UI, Workflows & Features
+
+ * Integrate the reftable code into the refs framework as a backend.
+   With "git init --ref-format=reftable", hopefully it would be a lot
+   more efficient to manage a repository with many references.
+
+ * "git checkout -p" and friends learned that that "@" is a synonym
+   for "HEAD".
+
+ * Variants of vimdiff learned to honor mergetool.<variant>.layout
+   settings.
+
+ * "git reflog" learned a "list" subcommand that enumerates known reflogs.
+
+ * When a merge conflicted at a submodule, merge-ort backend used to
+   unconditionally give a lengthy message to suggest how to resolve
+   it.  Now the message can be squelched as an advice message.
+
+ * "git for-each-ref" learned "--include-root-refs" option to show
+   even the stuff outside the 'refs/' hierarchy.
+
+ * "git rev-list --missing=print" has learned to optionally take
+   "--allow-missing-tips", which allows the objects at the starting
+   points to be missing.
+
+ * "git merge-tree" has learned that the three trees involved in the
+   3-way merge only need to be trees, not necessarily commits.
+
+ * "git log --merge" learned to pay attention to CHERRY_PICK_HEAD and
+   other kinds of *_HEAD pseudorefs.
+
+ * Platform specific tweaks for OS/390 has been added to
+   config.mak.uname.
+
+ * Users with safe.bareRepository=explicit can still work from within
+   $GIT_DIR of a seconary worktree (which resides at .git/worktrees/$name/)
+   of the primary worktree without explicitly specifying the $GIT_DIR
+   environment variable or the --git-dir=<path> option.
+
+ * The output format for dates "iso-strict" has been tweaked to show
+   a time in the Zulu timezone with "Z" suffix, instead of "+00:00".
+
+ * "git diff" and friends learned two extra configuration variables,
+   diff.srcPrefix and diff.dstPrefix.
+
+ * The status.showUntrackedFiles configuration variable had a name
+   that tempts users to set a Boolean value expressed in our usual
+   "false", "off", and "0", but it only took "no".  This has been
+   corrected so "true" and its synonyms are taken as "normal", while
+   "false" and its synonyms are taken as "no".
+
+ * Remove an ancient and not well maintained Hg-to-git migration
+   script from contrib/.
+
+ * Hints that suggest what to do after resolving conflicts can now be
+   squelched by disabling advice.mergeConflict.
+
+ * Allow git-cherry-pick(1) to automatically drop redundant commits via
+   a new `--empty` option, similar to the `--empty` options for
+   git-rebase(1) and git-am(1). Includes a soft deprecation of
+   `--keep-redundant-commits` as well as some related docs changes and
+   sequencer code cleanup.
+
+ * "git config" learned "--comment=<message>" option to leave a
+   comment immediately after the "variable = value" on the same line
+   in the configuration file.
+
+ * core.commentChar used to be limited to a single byte, but has been
+   updated to allow an arbitrary multi-byte sequence.
+
+ * "git add -p" and other "interactive hunk selection" UI has learned to
+   skip showing the hunk immediately after it has already been shown, and
+   an additional action to explicitly ask to reshow the current hunk.
+
+ * "git pack-refs" learned the "--auto" option, which defers the decision of
+   whether and how to pack to the ref backend. This is used by the reftable
+   backend to avoid repacking of an already-optimal ref database. The new mode
+   is triggered from "git gc --auto".
+
+ * "git add -u <pathspec>" and "git commit [-i] <pathspec>" did not
+   diagnose a pathspec element that did not match any files in certain
+   situations, unlike "git add <pathspec>" did.
+
+ * The userdiff patterns for C# has been updated.
+
+ * Git writes a "waiting for your editor" message on an incomplete
+   line after launching an editor, and then append another error
+   message on the same line if the editor errors out.  It now clears
+   the "waiting for..." line before giving the error message.
+
+ * The filename used for rejected hunks "git apply --reject" creates
+   was limited to PATH_MAX, which has been lifted.
+
+ * When "git bisect" reports the commit it determined to be the
+   culprit, we used to show it in a format that does not honor common
+   UI tweaks, like log.date and log.decorate.  The code has been
+   taught to use "git show" to follow more customizations.
+
+
+Performance, Internal Implementation, Development Support etc.
+
+ * The code to iterate over refs with the reftable backend has seen
+   some optimization.
+
+ * More tests that are marked as "ref-files only" have been updated to
+   improve test coverage of reftable backend.
+
+ * Some parts of command line completion script (in contrib/) have
+   been micro-optimized.
+
+ * The way placeholders are to be marked-up in documentation have been
+   specified; use "_<placeholder>_" to typeset the word inside a pair
+   of <angle-brackets> emphasized.
+
+ * "git --no-lazy-fetch cmd" allows to run "cmd" while disabling lazy
+   fetching of objects from the promisor remote, which may be handy
+   for debugging.
+
+ * The implementation in "git clean" that makes "-n" and "-i" ignore
+   clean.requireForce has been simplified, together with the
+   documentation.
+
+ * Uses of xwrite() helper have been audited and updated for better
+   error checking and simpler code.
+
+ * Some trace2 events that lacked def_param have learned to show it,
+   enriching the output.
+
+ * The parse-options code that deals with abbreviated long option
+   names have been cleaned up.
+
+ * The code in reftable backend that creates new table files works
+   better with the tempfile framework to avoid leaving cruft after a
+   failure.
+
+ * The reftable code has its own custom binary search function whose
+   comparison callback has an unusual interface, which caused the
+   binary search to degenerate into a linear search, which has been
+   corrected.
+
+ * The code to iterate over reflogs in the reftable has been optimized
+   to reduce memory allocation and deallocation.
+
+ * Work to support a repository that work with both SHA-1 and SHA-256
+   hash algorithms has started.
+
+ * A new fuzz target that exercises config parsing code has been
+   added.
+
+ * Fix the way recently added tests interpolate variables defined
+   outside them, and document the best practice to help future
+   developers.
+
+ * Introduce an experimental protocol for contributors to propose the
+   topic description to be used in the "What's cooking" report, the
+   merge commit message for the topic, and in the release notes and
+   document it in the SubmittingPatches document.
+
+ * The t/README file now gives a hint on running individual tests in
+   the "t/" directory with "make t<num>-*.sh t<num>-*.sh".
+   (merge 8d383806fc pb/test-scripts-are-build-targets later to maint).
+
+ * The "hint:" messages given by the advice mechanism, when given a
+   message with a blank line, left a line with trailing whitespace,
+   which has been cleansed.
+
+ * Documentation rules has been explicitly described how to mark-up
+   literal parts and a few manual pages have been updated as examples.
+
+ * The .editorconfig file has been taught that a Makefile uses HT
+   indentation.
+
+ * t-prio-queue test has been cleaned up by using C99 compound
+   literals; this is meant to also serve as a weather-balloon to smoke
+   out folks with compilers who have trouble compiling code that uses
+   the feature.
+
+ * Windows binary used to decide the use of unix-domain socket at
+   build time, but it learned to make the decision at runtime instead.
+
+ * The "shared repository" test in the t0610 reftable test failed
+   under restrictive umask setting (e.g. 007), which has been
+   corrected.
+
+ * Document and apply workaround for a buggy version of dash that
+   mishandles "local var=val" construct.
+
+ * The codepaths that reach date_mode_from_type() have been updated to
+   pass "struct date_mode" by value to make them thread safe.
+
+ * The strategy to compact multiple tables of reftables after many
+   operations accumulate many entries has been improved to avoid
+   accumulating too many tables uncollected.
+
+ * The code to iterate over reftable blocks has seen some optimization
+   to reduce memory allocation and deallocation.
+
+ * The way "git fast-import" handles paths described in its input has
+   been tightened up and more clearly documented.
+
+ * The cvsimport tests required that the platform understands
+   traditional timezone notations like CST6CDT, which has been
+   updated to work on those systems as long as they understand
+   POSIX notation with explicit tz transition dates.
+
+ * The code to format trailers have been cleaned up.
+
+
+Fixes since v2.44
+-----------------
+
+ * "git apply" on a filesystem without filemode support have learned
+   to take a hint from what is in the index for the path, even when
+   not working with the "--index" or "--cached" option, when checking
+   the executable bit match what is required by the preimage in the
+   patch.
+   (merge 45b625142d cp/apply-core-filemode later to maint).
+
+ * "git column" has been taught to reject negative padding value, as
+   it would lead to nonsense behaviour including division by zero.
+   (merge 76fb807faa kh/column-reject-negative-padding later to maint).
+
+ * "git am --help" now tells readers what actions are available in
+   "git am --whitespace=<action>", in addition to saying that the
+   option is passed through to the underlying "git apply".
+   (merge a171dac734 jc/am-whitespace-doc later to maint).
+
+ * "git tag --column" failed to check the exit status of its "git
+   column" invocation, which has been corrected.
+   (merge 92e66478fc rj/tag-column-fix later to maint).
+
+ * Credential helper based on libsecret (in contrib/) has been updated
+   to handle an empty password correctly.
+   (merge 8f1f2023b7 mh/libsecret-empty-password-fix later to maint).
+
+ * "git difftool --dir-diff" learned to honor the "--trust-exit-code"
+   option; it used to always exit with 0 and signalled success.
+   (merge eb84c8b6ce ps/difftool-dir-diff-exit-code later to maint).
+
+ * The code incorrectly attempted to use textconv cache when asked,
+   even when we are not running in a repository, which has been
+   corrected.
+   (merge affe355fe7 jk/textconv-cache-outside-repo-fix later to maint).
+
+ * Remove an empty file that shouldn't have been added in the first
+   place.
+   (merge 4f66942215 js/remove-cruft-files later to maint).
+
+ * The logic to access reflog entries by date and number had ugly
+   corner cases at the boundaries, which have been cleaned up.
+   (merge 5edd126720 jk/reflog-special-cases-fix later to maint).
+
+ * An error message from "git upload-pack", which responds to "git
+   fetch" requests, had a trailing NUL in it, which has been
+   corrected.
+   (merge 3f4c7a0805 sg/upload-pack-error-message-fix later to maint).
+
+ * Clarify wording in the CodingGuidelines that requires <git-compat-util.h>
+   to be the first header file.
+   (merge 4e89f0e07c jc/doc-compat-util later to maint).
+
+ * "git commit -v --cleanup=scissors" used to add the scissors line
+   twice in the log message buffer, which has been corrected.
+   (merge e90cc075cc jt/commit-redundant-scissors-fix later to maint).
+
+ * A custom remote helper no longer cannot access the newly created
+   repository during "git clone", which is a regression in Git 2.44.
+   This has been corrected.
+   (merge 199f44cb2e ps/remote-helper-repo-initialization-fix later to maint).
+
+ * Various parts of upload-pack have been updated to bound the resource
+   consumption relative to the size of the repository to protect from
+   abusive clients.
+   (merge 6cd05e768b jk/upload-pack-bounded-resources later to maint).
+
+ * The upload-pack program, when talking over v2, accepted the
+   packfile-uris protocol extension from the client, even if it did
+   not advertise the capability, which has been corrected.
+   (merge a922bfa3b5 jk/upload-pack-v2-capability-cleanup later to maint).
+
+ * Make sure failure return from merge_bases_many() is properly caught.
+   (merge 25fd20eb44 js/merge-base-with-missing-commit later to maint).
+
+ * FSMonitor client code was confused when FSEvents were given in a
+   different case on a case-insensitive filesystem, which has been
+   corrected.
+   (merge 29c139ce78 jh/fsmonitor-icase-corner-case-fix later to maint).
+
+ * The "core.commentChar" configuration variable only allows an ASCII
+   character, which was not clearly documented, which has been
+   corrected.
+   (merge fb7c556f58 kh/doc-commentchar-is-a-byte later to maint).
+
+ * With release 2.44 we got rid of all uses of test_i18ngrep and there
+   is no in-flight topic that adds a new use of it.  Make a call to
+   test_i18ngrep a hard failure, so that we can remove it at the end
+   of this release cycle.
+   (merge 381a83dfa3 jc/test-i18ngrep later to maint).
+
+ * The command line completion script (in contrib/) learned to
+   complete "git reflog" better.
+   (merge 1284f9cc11 rj/complete-reflog later to maint).
+
+ * The logic to complete the command line arguments to "git worktree"
+   subcommand (in contrib/) has been updated to correctly honor things
+   like "git -C dir" etc.
+   (merge 3574816d98 rj/complete-worktree-paths-fix later to maint).
+
+ * When git refuses to create a branch because the proposed branch
+   name is not a valid refname, an advice message is given to refer
+   the user to exact naming rules.
+   (merge 8fbd903e58 kh/branch-ref-syntax-advice later to maint).
+
+ * Code simplification by getting rid of code that sets an environment
+   variable that is no longer used.
+   (merge 72a8d3f027 pw/rebase-i-ignore-cherry-pick-help-environment later to maint).
+
+ * The code to find the effective end of log messages can fall into an
+   endless loop, which has been corrected.
+   (merge 2541cba2d6 fs/find-end-of-log-message-fix later to maint).
+
+ * Mark-up used in the documentation has been improved for
+   consistency.
+   (merge 45d5ed3e50 ja/doc-markup-fixes later to maint).
+
+ * The status.showUntrackedFiles configuration variable was
+   incorrectly documented to accept "false", which has been corrected.
+
+ * Leaks from "git restore" have been plugged.
+   (merge 2f64da0790 rj/restore-plug-leaks later to maint).
+
+ * "git bugreport --no-suffix" was not supported and instead
+   segfaulted, which has been corrected.
+   (merge b3b57c69da js/bugreport-no-suffix-fix later to maint).
+
+ * The documentation for "%(trailers[:options])" placeholder in the
+   "--pretty" option of commands in the "git log" family has been
+   updated.
+   (merge bff85a338c bl/doc-key-val-sep-fix later to maint).
+
+ * "git checkout --conflict=bad" reported a bad conflictStyle as if it
+   were given to a configuration variable; it has been corrected to
+   report that the command line option is bad.
+   (merge 5a99c1ac1a pw/checkout-conflict-errorfix later to maint).
+
+ * Code clean-up in the "git log" machinery that implements custom log
+   message formatting.
+   (merge 1c10b8e5b0 jk/pretty-subject-cleanup later to maint).
+
+ * "git config" corrupted literal HT characters written in the
+   configuration file as part of a value, which has been corrected.
+   (merge e6895c3f97 ds/config-internal-whitespace-fix later to maint).
+
+ * A unit test for reftable code tried to enumerate all files in a
+   directory after reftable operations and expected to see nothing but
+   the files it wanted to leave there, but was fooled by .nfs* cruft
+   files left, which has been corrected.
+   (merge 0068aa7946 ps/reftable-unit-test-nfs-workaround later to maint).
+
+ * The implementation and documentation of "object-format" option
+   exchange between the Git itself and its remote helpers did not
+   quite match, which has been corrected.
+
+ * The "--pretty=<shortHand>" option of the commands in the "git log"
+   family, defined as "[pretty] shortHand = <expansion>" should have
+   been looked up case insensitively, but was not, which has been
+   corrected.
+   (merge f999d5188b bl/pretty-shorthand-config-fix later to maint).
+
+ * "git apply" failed to extract the filename the patch applied to,
+   when the change was about an empty file created in or deleted from
+   a directory whose name ends with a SP, which has been corrected.
+   (merge 776ffd1a30 jc/apply-parse-diff-git-header-names-fix later to maint).
+
+ * Update a more recent tutorial doc.
+   (merge 95ab557b4b dg/myfirstobjectwalk-updates later to maint).
+
+ * The test script had an incomplete and ineffective attempt to avoid
+   clobbering the testing user's real crontab (and its equivalents),
+   which has been completed.
+   (merge 73cb87773b es/test-cron-safety later to maint).
+
+ * Use advice_if_enabled() API to rewrite a simple pattern to
+   call advise() after checking advice_enabled().
+   (merge 6412d01527 rj/use-adv-if-enabled later to maint).
+
+ * Another "set -u" fix for the bash prompt (in contrib/) script.
+   (merge d7805bc743 vs/complete-with-set-u-fix later to maint).
+
+ * "git checkout/switch --detach foo", after switching to the detached
+   HEAD state, gave the tracking information for the 'foo' branch,
+   which was pointless.
+
+ * "git apply" has been updated to lift the hardcoded pathname length
+   limit, which in turn allowed a mksnpath() function that is no
+   longer used.
+   (merge 708f7e0590 rs/apply-lift-path-length-limit later to maint).
+
+ * A file descriptor leak in an error codepath, used when "git apply
+   --reject" fails to create the *.rej file, has been corrected.
+   (merge 2b1f456adf rs/apply-reject-fd-leakfix later to maint).
+
+ * A config parser callback function fell through instead of returning
+   after recognising and processing a variable, wasting cycles, which
+   has been corrected.
+   (merge a816ccd642 ds/fetch-config-parse-microfix later to maint).
+
+ * Fix was added to work around a regression in libcURL 8.7.0 (which has
+   already been fixed in their tip of the tree).
+   (merge 92a209bf24 jk/libcurl-8.7-regression-workaround later to maint).
+
+ * The variable that holds the value read from the core.excludefile
+   configuration variable used to leak, which has been corrected.
+   (merge 0e0fefb29f jc/unleak-core-excludesfile later to maint).
+
+ * vreportf(), which is used by error() and friends, has been taught
+   to give the error message printf-format string when its vsnprintf()
+   call fails, instead of showing nothing useful to identify the
+   nature of the error.
+   (merge c63adab961 rs/usage-fallback-to-show-message-format later to maint).
+
+ * Adjust to an upcoming changes to GNU make that breaks our Makefiles.
+   (merge 227b8fd902 tb/make-indent-conditional-with-non-spaces later to maint).
+
+ * Git 2.44 introduced a regression that makes the updated code to
+   barf in repositories with multi-pack index written by older
+   versions of Git, which has been corrected.
+
+ * When .git/rr-cache/ rerere database gets corrupted or rerere is fed to
+   work on a file with conflicted hunks resolved incompletely, the rerere
+   machinery got confused and segfaulted, which has been corrected.
+   (merge 167395bb47 mr/rerere-crash-fix later to maint).
+
+ * The "receive-pack" program (which responds to "git push") was not
+   converted to run "git maintenance --auto" when other codepaths that
+   used to run "git gc --auto" were updated, which has been corrected.
+   (merge 7bf3057d9c ps/run-auto-maintenance-in-receive-pack later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+   (merge f0e578c69c rs/use-xstrncmpz later to maint).
+   (merge 83e6eb7d7a ba/credential-test-clean-fix later to maint).
+   (merge 64562d784d jb/doc-interactive-singlekey-do-not-need-perl later to maint).
+   (merge c431a235e2 cp/t9146-use-test-path-helpers later to maint).
+   (merge 82d75402d5 ds/doc-send-email-capitalization later to maint).
+   (merge 41bff66e35 jc/doc-add-placeholder-fix later to maint).
+   (merge 6835f0efe9 jw/remote-doc-typofix later to maint).
+   (merge 244001aa20 hs/rebase-not-in-progress later to maint).
+   (merge 2ca6c07db2 jc/no-include-of-compat-util-from-headers later to maint).
+   (merge 87bd7fbb9c rs/fetch-simplify-with-starts-with later to maint).
+   (merge f39addd0d9 rs/name-rev-with-mempool later to maint).
+   (merge 9a97b43e03 rs/submodule-prefix-simplify later to maint).
+   (merge 40b8076462 ak/rebase-autosquash later to maint).
+   (merge 3223204456 eg/add-uflags later to maint).
+   (merge 5f78d52dce es/config-doc-sort-sections later to maint).
+   (merge 781fb7b4c2 as/option-names-in-messages later to maint).
+   (merge 51d41dc243 jk/doc-remote-helpers-markup-fix later to maint).
+   (merge e1aaf309db pb/ci-win-artifact-names-fix later to maint).
+   (merge ad538c61da jc/index-pack-fsck-levels later to maint).
+   (merge 67471bc704 ja/doc-formatting-fix later to maint).
+   (merge 86f9ce7dd6 bl/doc-config-fixes later to maint).
+   (merge 0d527842b7 az/grep-group-error-message-update later to maint).
+   (merge 7c43bdf07b rs/strbuf-expand-bad-format later to maint).
+   (merge 8b68b48d5c ds/typofix-core-config-doc later to maint).
+   (merge 39bb692152 rs/imap-send-use-xsnprintf later to maint).
+   (merge 8d320cec60 jc/t2104-style-fixes later to maint).
+   (merge b4454d5a7b pw/t3428-cleanup later to maint).
+   (merge 84a7c33a4b pf/commitish-committish later to maint).
+   (merge 8882ee9d68 la/mailmap-entry later to maint).
+   (merge 44bdba2fa6 rs/no-openssl-compilation-fix-on-macos later to maint).
+   (merge f412d72c19 yb/replay-doc-linkfix later to maint).
+   (merge 5da40be8d7 xx/rfc2822-date-format-in-doc later to maint).
diff --git a/Documentation/RelNotes/2.45.1.txt b/Documentation/RelNotes/2.45.1.txt
new file mode 100644
index 0000000..3b0d60c
--- /dev/null
+++ b/Documentation/RelNotes/2.45.1.txt
@@ -0,0 +1,8 @@
+Git v2.45.1 Release Notes
+=========================
+
+This release merges up the fix that appears in v2.39.4,
+v2.40.2, v2.41.1, v2.42.2, v2.43.4 and v2.44.1 to address the
+security issues CVE-2024-32002, CVE-2024-32004, CVE-2024-32020,
+CVE-2024-32021 and CVE-2024-32465; see the release notes for
+these versions for details.
diff --git a/Documentation/RelNotes/2.45.2.txt b/Documentation/RelNotes/2.45.2.txt
new file mode 100644
index 0000000..13429e6
--- /dev/null
+++ b/Documentation/RelNotes/2.45.2.txt
@@ -0,0 +1,26 @@
+Git v2.45.2 Release Notes
+=========================
+
+In preparing security fixes for four CVEs, we made overly aggressive
+"defense in depth" changes that broke legitimate use cases like 'git
+lfs' and 'git annex.'  This release is to revert these misguided, if
+well-intentioned, changes that were shipped in 2.45.1 and were not
+direct security fixes.
+
+Jeff King (5):
+      send-email: drop FakeTerm hack
+      send-email: avoid creating more than one Term::ReadLine object
+      ci: drop mention of BREW_INSTALL_PACKAGES variable
+      ci: avoid bare "gcc" for osx-gcc job
+      ci: stop installing "gcc-13" for osx-gcc
+
+Johannes Schindelin (6):
+      hook: plug a new memory leak
+      init: use the correct path of the templates directory again
+      Revert "core.hooksPath: add some protection while cloning"
+      tests: verify that `clone -c core.hooksPath=/dev/null` works again
+      clone: drop the protections where hooks aren't run
+      Revert "Add a helper function to compare file contents"
+
+Junio C Hamano (1):
+      Revert "fsck: warn about symlink pointing inside a gitdir"
diff --git a/Documentation/RelNotes/2.46.0.txt b/Documentation/RelNotes/2.46.0.txt
new file mode 100644
index 0000000..6321ddc
--- /dev/null
+++ b/Documentation/RelNotes/2.46.0.txt
@@ -0,0 +1,248 @@
+Git v2.46 Release Notes
+=======================
+
+Backward Compatibility Notes
+
+ (None at this moment)
+
+UI, Workflows & Features
+
+ * The "--rfc" option of "git format-patch" learned to take an
+   optional string value to be used in place of "RFC" to tweak the
+   "[PATCH]" on the subject header.
+
+ * The credential helper protocol, together with the HTTP layer, have
+   been enhanced to support authentication schemes different from
+   username & password pair, like Bearer and NTLM.
+
+ * Command line completion script (in contrib/) learned to complete
+   "git symbolic-ref" a bit better (you need to enable plumbing
+   commands to be completed with GIT_COMPLETION_SHOW_ALL_COMMANDS).
+
+ * When the user responds to a prompt given by "git add -p" with an
+   unsupported command, list of available commands were given, which
+   was too much if the user knew what they wanted to type but merely
+   made a typo.  Now the user gets a much shorter error message.
+
+ * The color parsing code learned to handle 12-bit RGB colors, spelled
+   as "#RGB" (in addition to "#RRGGBB" that is already supported).
+
+ * The operation mode options (like "--get") the "git config" command
+   uses have been deprecated and replaced with subcommands (like "git
+   config get").
+
+ * "git tag" learned the "--trailer" option to futz with the trailers
+   in the same way as "git commit" does.
+
+ * A new global "--no-advice" option can be used to disable all advice
+   messages, which is meant to be used only in scripts.
+
+ * Updates to symbolic refs can now be made as a part of ref
+   transaction.
+
+ * The trailer API has been reshuffled a bit.
+
+ * Terminology to call various ref-like things are getting
+   straightened out.
+
+ * The command line completion script (in contrib/) has been adjusted
+   to the recent update to "git config" that adopted subcommand based
+   UI.
+
+ * The knobs to tweak how reftable files are written have been made
+   available as configuration variables.
+
+ * When "git push" notices that the commit at the tip of the ref on
+   the other side it is about to overwrite does not exist locally, it
+   used to first try fetching it if the local repository is a partial
+   clone. The command has been taught not to do so and immediately
+   fail instead.
+
+ * The promisor.quiet configuration knob can be set to true to make
+   lazy fetching from promisor remotes silent.
+
+
+Performance, Internal Implementation, Development Support etc.
+
+ * Advertise "git contacts", a tool for newcomers to find people to
+   ask review for their patches, a bit more in our developer
+   documentation.
+
+ * In addition to building the objects needed, try to link the objects
+   that are used in fuzzer tests, to make sure at least they build
+   without bitrot, in Linux CI runs.
+
+ * Code to write out reftable has seen some optimization and
+   simplification.
+
+ * Tests to ensure interoperability between reftable written by jgit
+   and our code have been added and enabled in CI.
+
+ * The singleton index_state instance "the_index" has been eliminated
+   by always instantiating "the_repository" and replacing references
+   to "the_index"  with references to its .index member.
+
+ * Git-GUI has a new maintainer, Johannes Sixt.
+
+ * The "test-tool" has been taught to run testsuite tests in parallel,
+   bypassing the need to use the "prove" tool.
+
+ * The "whitespace check" task that was enabled for GitHub Actions CI
+   has been ported to GitLab CI.
+
+ * The refs API lost functions that implicitly assumes to work on the
+   primary ref_store by forcing the callers to pass a ref_store as an
+   argument.
+
+ * Code clean-up to reduce inter-function communication inside
+   builtin/config.c done via the use of global variables.
+
+ * The pack bitmap code saw some clean-up to prepare for a follow-up topic.
+
+ * Preliminary code clean-up for "git send-email".
+
+ * The default "creation-factor" used by "git format-patch" has been
+   raised to make it more aggressively find matching commits.
+
+ * Before discovering the repository details, We used to assume SHA-1
+   as the "default" hash function, which has been corrected. Hopefully
+   this will smoke out codepaths that rely on such an unwarranted
+   assumptions.
+
+ * The project decision making policy has been documented.
+
+ * The strcmp-offset tests have been rewritten using the unit test
+   framework.
+
+ * "git add -p" learned to complain when an answer with more than one
+   letter is given to a prompt that expects a single letter answer.
+
+ * The alias-expanded command lines are logged to the trace output.
+
+ * A new test was added to ensure git commands that are designed to
+   run outside repositories do work.
+
+ * Basic unit tests for reftable have been reimplemented under the
+   unit test framework.
+
+ * A pair of test helpers that essentially are unit tests on hash
+   algorithms have been rewritten using the unit-tests framework.
+
+ * A test helper that essentially is unit tests on the "decorate"
+   logic has been rewritten using the unit-tests framework.
+
+ * Many memory leaks in the sparse-checkout code paths have been
+   plugged.
+
+
+Fixes since v2.45
+-----------------
+
+ * "git rebase --signoff" used to forget that it needs to add a
+   sign-off to the resulting commit when told to continue after a
+   conflict stops its operation.
+   (merge a6c2654f83 pw/rebase-m-signoff-fix later to maint).
+
+ * The procedure to build multi-pack-index got confused by the
+   replace-refs mechanism, which has been corrected by disabling the
+   latter.
+   (merge 93e2ae1c95 xx/disable-replace-when-building-midx later to maint).
+
+ * The "-k" and "--rfc" options of "format-patch" will now error out
+   when used together, as one tells us not to add anything to the
+   title of the commit, and the other one tells us to add "RFC" in
+   addition to "PATCH".
+   (merge cadcf58085 ds/format-patch-rfc-and-k later to maint).
+
+ * "git stash -S" did not handle binary files correctly, which has
+   been corrected.
+   (merge 5fb7686409 aj/stash-staged-fix later to maint).
+
+ * A scheduled "git maintenance" job is expected to work on all
+   repositories it knows about, but it stopped at the first one that
+   errored out.  Now it keeps going.
+   (merge c75662bfc9 js/for-each-repo-keep-going later to maint).
+
+ * zsh can pretend to be a normal shell pretty well except for some
+   glitches that we tickle in some of our scripts. Work them around
+   so that "vimdiff" and our test suite works well enough with it.
+   (merge fedd5c79ff bc/zsh-compatibility later to maint).
+
+ * Command line completion support for zsh (in contrib/) has been
+   updated to stop exposing internal state to end-user shell
+   interaction.
+   (merge 3c20acdf46 dk/zsh-git-repo-path-fix later to maint).
+
+ * Tests that try to corrupt in-repository files in chunked format did
+   not work well on macOS due to its broken "mv", which has been
+   worked around.
+
+ * The maximum size of attribute files is enforced more consistently.
+   (merge c793f9cb08 tb/attr-limits later to maint).
+
+ * Unbreak CI jobs so that we do not attempt to use Python 2 that has
+   been removed from the platform.
+
+ * Git 2.43 started using the tree of HEAD as the source of attributes
+   in a bare repository, which has severe performance implications.
+   For now, revert the change, without ripping out a more explicit
+   support for the attr.tree configuration variable.
+
+ * The "--exit-code" option of "git diff" command learned to work with
+   the "--ext-diff" option.
+   (merge 11be65cfa4 rs/external-diff-with-exit-code later to maint).
+
+ * Windows CI running in GitHub Actions started complaining about the
+   order of arguments given to calloc(); the imported regex code uses
+   the wrong order almost consistently, which has been corrected.
+
+ * Expose "name conflict" error when a ref creation fails due to D/F
+   conflict in the ref namespace, to improve an error message given by
+   "git fetch".
+   (merge 9339fca23e it/refs-name-conflict later to maint).
+
+ * The SubmittingPatches document now refers folks to manpages
+   translation project.
+
+ * The documentation for "git diff --name-only" has been clarified
+   that it is about showing the names in the post-image tree.
+   (merge 4986662cbc jc/doc-diff-name-only later to maint).
+
+ * The credential helper that talks with osx keychain learned to avoid
+   storing back the authentication material it just got received from
+   the keychain.
+   (merge e1ab45b2da kn/osxkeychain-skip-idempotent-store later to maint).
+
+ * The chainlint script (invoked during "make test") did nothing when
+   it failed to detect the number of available CPUs.  It now falls
+   back to 1 CPU to avoid the problem.
+   (merge 2e7e9205be es/chainlint-ncores-fix later to maint).
+
+ * Revert overly aggressive "layered defence" that went into 2.45.1
+   and friends, which broke "git-lfs", "git-annex", and other use
+   cases, so that we can rebuild necessary counterparts in the open.
+
+ * "git init" in an already created directory, when the user
+   configuration has includeif.onbranch, started to fail recently,
+   which has been corrected.
+   (merge 407997c1dd ps/fix-reinit-includeif-onbranch later to maint).
+
+ * Memory leaks in "git mv" has been plugged.
+
+ * The safe.directory configuration knob has been updated to
+   optionally allow leading path matches.
+   (merge 313eec177a jc/safe-directory-leading-path later to maint).
+
+ * An overly large ".gitignore" files are now rejected silently.
+   (merge e7c3d1ddba jk/cap-exclude-file-size later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+   (merge a5a4cb7b27 rs/diff-parseopts-cleanup later to maint).
+   (merge 55702c543e fa/p4-error later to maint).
+   (merge 2566a77774 vd/doc-merge-tree-x-option later to maint).
+   (merge b64b0df9da ds/scalar-reconfigure-all-fix later to maint).
+   (merge c81ffcff83 dm/update-index-doc-fix later to maint).
+   (merge fc0202b0e9 dg/fetch-pack-code-cleanup later to maint).
+   (merge 7150f140f9 mt/t0211-typofix later to maint).
+   (merge d424488901 jc/rev-parse-fatal-doc later to maint).
+   (merge 36d900d2b0 rs/difftool-env-simplify later to maint).
diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index e734a3f..d8a8caa 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -7,6 +7,73 @@
 project. There is also a link:MyFirstContribution.html[step-by-step tutorial]
 available which covers many of these same guidelines.
 
+[[patch-flow]]
+=== A typical life cycle of a patch series
+
+To help us understand the reason behind various guidelines given later
+in the document, first let's understand how the life cycle of a
+typical patch series for this project goes.
+
+. You come up with an itch.  You code it up.  You do not need any
+  pre-authorization from the project to do so.
++
+Your patches will be reviewed by other contributors on the mailing
+list, and the reviews will be done to assess the merit of various
+things, like the general idea behind your patch (including "is it
+solving a problem worth solving in the first place?"), the reason
+behind the design of the solution, and the actual implementation.
+The guidelines given here are there to help your patches by making
+them easier to understand by the reviewers.
+
+. You send the patches to the list and cc people who may need to know
+  about the change.  Your goal is *not* necessarily to convince others
+  that what you are building is good.  Your goal is to get help in
+  coming up with a solution for the "itch" that is better than what
+  you can build alone.
++
+The people who may need to know are the ones who worked on the code
+you are touching.  These people happen to be the ones who are
+most likely to be knowledgeable enough to help you, but
+they have no obligation to help you (i.e. you ask them for help,
+you don't demand).  +git log -p {litdd} _$area_you_are_modifying_+ would
+help you find out who they are.
+
+. You get comments and suggestions for improvements.  You may even get
+  them in an "on top of your change" patch form.  You are expected to
+  respond to them with "Reply-All" on the mailing list, while taking
+  them into account while preparing an updated set of patches.
+
+. Polish, refine, and re-send your patches to the list and to the people
+  who spent their time to improve your patch.  Go back to step (2).
+
+. While the above iterations improve your patches, the maintainer may
+  pick the patches up from the list and queue them to the `seen`
+  branch, in order to make it easier for people to play with it
+  without having to pick up and apply the patches to their trees
+  themselves.  Being in `seen` has no other meaning.  Specifically, it
+  does not mean the patch was "accepted" in any way.
+
+. When the discussion reaches a consensus that the latest iteration of
+  the patches are in good enough shape, the maintainer includes the
+  topic in the "What's cooking" report that are sent out a few times a
+  week to the mailing list, marked as "Will merge to 'next'."  This
+  decision is primarily made by the maintainer with help from those
+  who participated in the review discussion.
+
+. After the patches are merged to the 'next' branch, the discussion
+  can still continue to further improve them by adding more patches on
+  top, but by the time a topic gets merged to 'next', it is expected
+  that everybody agrees that the scope and the basic direction of the
+  topic are appropriate, so such an incremental updates are limited to
+  small corrections and polishing.  After a topic cooks for some time
+  (like 7 calendar days) in 'next' without needing further tweaks on
+  top, it gets merged to the 'master' branch and wait to become part
+  of the next major release.
+
+In the following sections, many techniques and conventions are listed
+to help your patches get reviewed effectively in such a life cycle.
+
+
 [[choose-starting-point]]
 === Choose a starting point.
 
@@ -192,8 +259,9 @@
   which case, they can explain why they extend your code to cover
   files, too).
 
-The goal of your log message is to convey the _why_ behind your
-change to help future developers.
+The goal of your log message is to convey the _why_ behind your change
+to help future developers.  The reviewers will also make sure that
+your proposed log message will serve this purpose well.
 
 The first line of the commit message should be a short description (50
 characters is the soft limit, see DISCUSSION in linkgit:git-commit[1]),
@@ -397,17 +465,57 @@
 [[send-patches]]
 === Sending your patches.
 
+==== Choosing your reviewers
+
 :security-ml: footnoteref:[security-ml,The Git Security mailing list: git-security@googlegroups.com]
 
-Before sending any patches, please note that patches that may be
+NOTE: Patches that may be
 security relevant should be submitted privately to the Git Security
 mailing list{security-ml}, instead of the public mailing list.
 
-Learn to use format-patch and send-email if possible.  These commands
+:contrib-scripts: footnoteref:[contrib-scripts,Scripts under `contrib/` are +
+not part of the core `git` binary and must be called directly. Clone the Git +
+codebase and run `perl contrib/contacts/git-contacts`.]
+
+Send your patch with "To:" set to the mailing list, with "cc:" listing
+people who are involved in the area you are touching (the `git-contacts`
+script in `contrib/contacts/`{contrib-scripts} can help to
+identify them), to solicit comments and reviews.  Also, when you made
+trial merges of your topic to `next` and `seen`, you may have noticed
+work by others conflicting with your changes.  There is a good possibility
+that these people may know the area you are touching well.
+
+If you are using `send-email`, you can feed it the output of `git-contacts` like
+this:
+
+....
+	git send-email --cc-cmd='perl contrib/contacts/git-contacts' feature/*.patch
+....
+
+:current-maintainer: footnote:[The current maintainer: gitster@pobox.com]
+:git-ml: footnote:[The mailing list: git@vger.kernel.org]
+
+After the list reached a consensus that it is a good idea to apply the
+patch, re-send it with "To:" set to the maintainer{current-maintainer}
+and "cc:" the list{git-ml} for inclusion.  This is especially relevant
+when the maintainer did not heavily participate in the discussion and
+instead left the review to trusted others.
+
+Do not forget to add trailers such as `Acked-by:`, `Reviewed-by:` and
+`Tested-by:` lines as necessary to credit people who helped your
+patch, and "cc:" them when sending such a final version for inclusion.
+
+==== `format-patch` and `send-email`
+
+Learn to use `format-patch` and `send-email` if possible.  These commands
 are optimized for the workflow of sending patches, avoiding many ways
 your existing e-mail client (often optimized for "multipart/*" MIME
 type e-mails) might render your patches unusable.
 
+NOTE: Here we outline the procedure using `format-patch` and
+`send-email`, but you can instead use GitGitGadget to send in your
+patches (see link:MyFirstContribution.html[MyFirstContribution]).
+
 People on the Git mailing list need to be able to read and
 comment on the changes you are submitting.  It is important for
 a developer to be able to "quote" your changes, using standard
@@ -415,10 +523,12 @@
 your code.  For this reason, each patch should be submitted
 "inline" in a separate message.
 
-Multiple related patches should be grouped into their own e-mail
-thread to help readers find all parts of the series.  To that end,
-send them as replies to either an additional "cover letter" message
-(see below), the first patch, or the respective preceding patch.
+All subsequent versions of a patch series and other related patches should be
+grouped into their own e-mail thread to help readers find all parts of the
+series.  To that end, send them as replies to either an additional "cover
+letter" message (see below), the first patch, or the respective preceding patch.
+Here is a link:MyFirstContribution.html#v2-git-send-email[step-by-step guide] on
+how to submit updated versions of a patch series.
 
 If your log message (including your name on the
 `Signed-off-by` trailer) is not writable in ASCII, make sure that
@@ -459,6 +569,18 @@
 Git-notes and inserted automatically following the three-dash
 line via `git format-patch --notes`.
 
+[[the-topic-summary]]
+*This is EXPERIMENTAL*.
+
+When sending a topic, you can propose a one-paragraph summary that
+should appear in the "What's cooking" report when it is picked up to
+explain the topic.  If you choose to do so, please write a 2-5 line
+paragraph that will fit well in our release notes (see many bulleted
+entries in the Documentation/RelNotes/* files for examples), and make
+it the first paragraph of the cover letter.  For a single-patch
+series, use the space between the three-dash line and the diffstat, as
+described earlier.
+
 [[attachment]]
 Do not attach the patch as a MIME attachment, compressed or not.
 Do not let your e-mail client send quoted-printable.  Do not let
@@ -486,42 +608,93 @@
 that starts with `-----BEGIN PGP SIGNED MESSAGE-----`.  That is
 not a text/plain, it's something else.
 
-:security-ml-ref: footnoteref:[security-ml]
+=== Handling Conflicts and Iterating Patches
 
-As mentioned at the beginning of the section, patches that may be
-security relevant should not be submitted to the public mailing list
-mentioned below, but should instead be sent privately to the Git
-Security mailing list{security-ml-ref}.
+When revising changes made to your patches, it's important to
+acknowledge the possibility of conflicts with other ongoing topics. To
+navigate these potential conflicts effectively, follow the recommended
+steps outlined below:
 
-Send your patch with "To:" set to the mailing list, with "cc:" listing
-people who are involved in the area you are touching (the `git
-contacts` command in `contrib/contacts/` can help to
-identify them), to solicit comments and reviews.  Also, when you made
-trial merges of your topic to `next` and `seen`, you may have noticed
-work by others conflicting with your changes.  There is a good possibility
-that these people may know the area you are touching well.
+. Build on a suitable base branch, see the <<choose-starting-point, section above>>,
+and format-patch the series. If you are doing "rebase -i" in-place to
+update from the previous round, this will reuse the previous base so
+(2) and (3) may become trivial.
 
-:current-maintainer: footnote:[The current maintainer: gitster@pobox.com]
-:git-ml: footnote:[The mailing list: git@vger.kernel.org]
+. Find the base of where the last round was queued
++
+    $ mine='kn/ref-transaction-symref'
+    $ git checkout "origin/seen^{/^Merge branch '$mine'}...master"
 
-After the list reached a consensus that it is a good idea to apply the
-patch, re-send it with "To:" set to the maintainer{current-maintainer}
-and "cc:" the list{git-ml} for inclusion.  This is especially relevant
-when the maintainer did not heavily participate in the discussion and
-instead left the review to trusted others.
+. Apply your format-patch result.  There are two cases
+.. Things apply cleanly and tests fine.  Go to (4).
+.. Things apply cleanly but does not build or test fails, or things do
+not apply cleanly.
++
+In the latter case, you have textual or semantic conflicts coming from
+the difference between the old base and the base you used to build in
+(1).  Identify what caused the breakages (e.g., a topic or two may have
+merged since the base used by (2) until the base used by (1)).
++
+Check out the latest 'origin/master' (which may be newer than the base
+used by (2)), "merge --no-ff" the topics you newly depend on in there,
+and use the result of the merge(s) as the base, rebuild the series and
+test again.  Run format-patch from the last such merges to the tip of
+your topic.  If you did
++
+    $ git checkout origin/master
+    $ git merge --no-ff --into-name kn/ref-transaction-symref fo/obar
+    $ git merge --no-ff --into-name kn/ref-transaction-symref ba/zqux
+    ... rebuild the topic ...
++
+Then you'd just format your topic above these "preparing the ground"
+merges, e.g.
++
+    $ git format-patch "HEAD^{/^Merge branch 'ba/zqux'}"..HEAD
++
+Do not forget to write in the cover letter you did this, including the
+topics you have in your base on top of 'master'.  Then go to (4).
 
-Do not forget to add trailers such as `Acked-by:`, `Reviewed-by:` and
-`Tested-by:` lines as necessary to credit people who helped your
-patch, and "cc:" them when sending such a final version for inclusion.
+. Make a trial merge of your topic into 'next' and 'seen', e.g.
++
+    $ git checkout --detach 'origin/seen'
+    $ git revert -m 1 <the merge of the previous iteration into seen>
+    $ git merge kn/ref-transaction-symref
++
+The "revert" is needed if the previous iteration of your topic is
+already in 'seen' (like in this case).  You could choose to rebuild
+master..origin/seen from scratch while excluding your previous
+iteration, which may emulate what happens on the maintainers end more
+closely.
++
+This trial merge may conflict.  It is primarily to see what conflicts
+_other_ topics may have with your topic.  In other words, you do not
+have to depend on it to make your topic work on 'master'.  It may
+become the job of the other topic owners to resolve conflicts if your
+topic goes to 'next' before theirs.
++
+Make a note on what conflict you saw in the cover letter.  You do not
+necessarily have to resolve them, but it would be a good opportunity to
+learn what others are doing in related areas.
++
+    $ git checkout --detach 'origin/next'
+    $ git merge kn/ref-transaction-symref
++
+This is to see what conflicts your topic has with other topics that are
+already cooking.  This should not conflict if (3)-2 prepared a base on
+top of updated master plus dependent topics taken from 'next'.  Unless
+the context is severe (one way to tell is try the same trial merge with
+your old iteration, which may conflict in a similar way), expect that it
+will be handled on maintainers end (if it gets unmanageable, I'll ask to
+rebase when I receive your patches).
 
 == Subsystems with dedicated maintainers
 
 Some parts of the system have dedicated maintainers with their own
 repositories.
 
-- `git-gui/` comes from git-gui project, maintained by Pratyush Yadav:
+- `git-gui/` comes from git-gui project, maintained by Johannes Sixt:
 
-	https://github.com/prati0100/git-gui.git
+        https://github.com/j6t/git-gui
 
 - `gitk-git/` comes from Paul Mackerras's gitk project:
 
@@ -536,54 +709,12 @@
 
 Patches to these parts should be based on their trees.
 
-[[patch-flow]]
-== An ideal patch flow
+- The "Git documentation translations" project, led by Jean-Noël
+  Avila, translates our documentation pages.  Their work products are
+  maintained separately from this project, not as part of our tree:
 
-Here is an ideal patch flow for this project the current maintainer
-suggests to the contributors:
+	https://github.com/jnavila/git-manpages-l10n/
 
-. You come up with an itch.  You code it up.
-
-. Send it to the list and cc people who may need to know about
-  the change.
-+
-The people who may need to know are the ones whose code you
-are butchering.  These people happen to be the ones who are
-most likely to be knowledgeable enough to help you, but
-they have no obligation to help you (i.e. you ask for help,
-don't demand).  +git log -p {litdd} _$area_you_are_modifying_+ would
-help you find out who they are.
-
-. You get comments and suggestions for improvements.  You may
-  even get them in an "on top of your change" patch form.
-
-. Polish, refine, and re-send to the list and the people who
-  spend their time to improve your patch.  Go back to step (2).
-
-. The list forms consensus that the last round of your patch is
-  good.  Send it to the maintainer and cc the list.
-
-. A topic branch is created with the patch and is merged to `next`,
-  and cooked further and eventually graduates to `master`.
-
-In any time between the (2)-(3) cycle, the maintainer may pick it up
-from the list and queue it to `seen`, in order to make it easier for
-people to play with it without having to pick up and apply the patch to
-their trees themselves.
-
-[[patch-status]]
-== Know the status of your patch after submission
-
-* You can use Git itself to find out when your patch is merged in
-  master. `git pull --rebase` will automatically skip already-applied
-  patches, and will let you know. This works only if you rebase on top
-  of the branch in which your patch has been merged (i.e. it will not
-  tell you if your patch is merged in `seen` if you rebase on top of
-  master).
-
-* Read the Git mailing list, the maintainer regularly posts messages
-  entitled "What's cooking in git.git" giving
-  the status of various proposed changes.
 
 == GitHub CI[[GHCI]]
 
diff --git a/Documentation/config.txt b/Documentation/config.txt
index e3a74dd..2d2d06d 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -22,9 +22,10 @@
 Syntax
 ~~~~~~
 
-The syntax is fairly flexible and permissive; whitespaces are mostly
-ignored.  The '#' and ';' characters begin comments to the end of line,
-blank lines are ignored.
+The syntax is fairly flexible and permissive.  Whitespace characters,
+which in this context are the space character (SP) and the horizontal
+tabulation (HT), are mostly ignored.  The '#' and ';' characters begin
+comments to the end of line.  Blank lines are ignored.
 
 The file consists of sections and variables.  A section begins with
 the name of the section in square brackets and continues until the next
@@ -63,16 +64,17 @@
 The variable names are case-insensitive, allow only alphanumeric characters
 and `-`, and must start with an alphabetic character.
 
-A line that defines a value can be continued to the next line by
-ending it with a `\`; the backslash and the end-of-line are
-stripped.  Leading whitespaces after 'name =', the remainder of the
-line after the first comment character '#' or ';', and trailing
-whitespaces of the line are discarded unless they are enclosed in
-double quotes.  Internal whitespaces within the value are retained
-verbatim.
+Whitespace characters surrounding `name`, `=` and `value` are discarded.
+Internal whitespace characters within 'value' are retained verbatim.
+Comments starting with either `#` or `;` and extending to the end of line
+are discarded.  A line that defines a value can be continued to the next
+line by ending it with a backslash (`\`);  the backslash and the end-of-line
+characters are discarded.
 
-Inside double quotes, double quote `"` and backslash `\` characters
-must be escaped: use `\"` for `"` and `\\` for `\`.
+If `value` needs to contain leading or trailing whitespace characters,
+it must be enclosed in double quotation marks (`"`).  Inside double quotation
+marks, double quote (`"`) and backslash (`\`) characters must be escaped:
+use `\"` for `"` and `\\` for `\`.
 
 The following escape sequences (beside `\"` and `\\`) are recognized:
 `\n` for newline character (NL), `\t` for horizontal tabulation (HT, TAB)
@@ -314,7 +316,8 @@
 Colors may also be given as numbers between 0 and 255; these use ANSI
 256-color mode (but note that not all terminals may support this).  If
 your terminal supports it, you may also specify 24-bit RGB values as
-hex, like `#ff0ab3`.
+hex, like `#ff0ab3`, or 12-bit RGB values like `#f1b`, which is
+equivalent to the 24-bit color `#ff11bb`.
 +
 The accepted attributes are `bold`, `dim`, `ul`, `blink`, `reverse`,
 `italic`, and `strike` (for crossed-out or "strikethrough" letters).
@@ -369,20 +372,18 @@
 names do not conflict with those that are used by Git itself and
 other popular tools, and describe them in your documentation.
 
-include::config/advice.txt[]
-
-include::config/attr.txt[]
-
-include::config/core.txt[]
-
 include::config/add.txt[]
 
+include::config/advice.txt[]
+
 include::config/alias.txt[]
 
 include::config/am.txt[]
 
 include::config/apply.txt[]
 
+include::config/attr.txt[]
+
 include::config/blame.txt[]
 
 include::config/branch.txt[]
@@ -405,10 +406,12 @@
 
 include::config/commitgraph.txt[]
 
-include::config/credential.txt[]
-
 include::config/completion.txt[]
 
+include::config/core.txt[]
+
+include::config/credential.txt[]
+
 include::config/diff.txt[]
 
 include::config/difftool.txt[]
@@ -421,10 +424,10 @@
 
 include::config/fetch.txt[]
 
-include::config/format.txt[]
-
 include::config/filter.txt[]
 
+include::config/format.txt[]
+
 include::config/fsck.txt[]
 
 include::config/fsmonitor--daemon.txt[]
@@ -435,10 +438,10 @@
 
 include::config/gitweb.txt[]
 
-include::config/grep.txt[]
-
 include::config/gpg.txt[]
 
+include::config/grep.txt[]
+
 include::config/gui.txt[]
 
 include::config/guitool.txt[]
@@ -485,6 +488,8 @@
 
 include::config/pretty.txt[]
 
+include::config/promisor.txt[]
+
 include::config/protocol.txt[]
 
 include::config/pull.txt[]
@@ -495,6 +500,8 @@
 
 include::config/receive.txt[]
 
+include::config/reftable.txt[]
+
 include::config/remote.txt[]
 
 include::config/remotes.txt[]
@@ -519,10 +526,10 @@
 
 include::config/ssh.txt[]
 
-include::config/status.txt[]
-
 include::config/stash.txt[]
 
+include::config/status.txt[]
+
 include::config/submodule.txt[]
 
 include::config/tag.txt[]
diff --git a/Documentation/config/advice.txt b/Documentation/config/advice.txt
index 4d7e5d8..0e35ae5 100644
--- a/Documentation/config/advice.txt
+++ b/Documentation/config/advice.txt
@@ -1,30 +1,65 @@
 advice.*::
 	These variables control various optional help messages designed to
-	aid new users. All 'advice.*' variables default to 'true', and you
-	can tell Git that you do not need help by setting these to 'false':
+	aid new users.  When left unconfigured, Git will give the message
+	alongside instructions on how to squelch it.  You can tell Git
+	that you do not need the help message by setting these to `false`:
 +
 --
+	addEmbeddedRepo::
+		Shown when the user accidentally adds one
+		git repo inside of another.
+	addEmptyPathspec::
+		Shown when the user runs `git add` without providing
+		the pathspec parameter.
+	addIgnoredFile::
+		Shown when the user attempts to add an ignored file to
+		the index.
+	amWorkDir::
+		Shown when linkgit:git-am[1] fails to apply a patch
+		file, to tell the user the location of the file.
 	ambiguousFetchRefspec::
-		Advice shown when a fetch refspec for multiple remotes maps to
+		Shown when a fetch refspec for multiple remotes maps to
 		the same remote-tracking branch namespace and causes branch
 		tracking set-up to fail.
+	checkoutAmbiguousRemoteBranchName::
+		Shown when the argument to
+		linkgit:git-checkout[1] and linkgit:git-switch[1]
+		ambiguously resolves to a
+		remote tracking branch on more than one remote in
+		situations where an unambiguous argument would have
+		otherwise caused a remote-tracking branch to be
+		checked out. See the `checkout.defaultRemote`
+		configuration variable for how to set a given remote
+		to be used by default in some situations where this
+		advice would be printed.
+	commitBeforeMerge::
+		Shown when linkgit:git-merge[1] refuses to
+		merge to avoid overwriting local changes.
+	detachedHead::
+		Shown when the user uses
+		linkgit:git-switch[1] or linkgit:git-checkout[1]
+		to move to the detached HEAD state, to tell the user how
+		to create a local branch after the fact.
+	diverging::
+		Shown when a fast-forward is not possible.
 	fetchShowForcedUpdates::
-		Advice shown when linkgit:git-fetch[1] takes a long time
+		Shown when linkgit:git-fetch[1] takes a long time
 		to calculate forced updates after ref updates, or to warn
 		that the check is disabled.
-	pushUpdateRejected::
-		Set this variable to 'false' if you want to disable
-		'pushNonFFCurrent', 'pushNonFFMatching', 'pushAlreadyExists',
-		'pushFetchFirst', 'pushNeedsForce', and 'pushRefNeedsUpdate'
-		simultaneously.
-	pushNonFFCurrent::
-		Advice shown when linkgit:git-push[1] fails due to a
-		non-fast-forward update to the current branch.
-	pushNonFFMatching::
-		Advice shown when you ran linkgit:git-push[1] and pushed
-		'matching refs' explicitly (i.e. you used ':', or
-		specified a refspec that isn't your current branch) and
-		it resulted in a non-fast-forward error.
+	forceDeleteBranch::
+		Shown when the user tries to delete a not fully merged
+		branch without the force option set.
+	ignoredHook::
+		Shown when a hook is ignored because the hook is not
+		set as executable.
+	implicitIdentity::
+		Shown when the user's information is guessed from the
+		system username and domain name, to tell the user how to
+		set their identity configuration.
+	mergeConflict::
+		Shown when various commands stop because of conflicts.
+	nestedTag::
+		Shown when a user attempts to recursively tag a tag object.
 	pushAlreadyExists::
 		Shown when linkgit:git-push[1] rejects an update that
 		does not qualify for fast-forwarding (e.g., a tag.)
@@ -37,17 +72,45 @@
 		tries to overwrite a remote ref that points at an
 		object that is not a commit-ish, or make the remote
 		ref point at an object that is not a commit-ish.
+	pushNonFFCurrent::
+		Shown when linkgit:git-push[1] fails due to a
+		non-fast-forward update to the current branch.
+	pushNonFFMatching::
+		Shown when the user ran linkgit:git-push[1] and pushed
+		"matching refs" explicitly (i.e. used `:`, or
+		specified a refspec that isn't the current branch) and
+		it resulted in a non-fast-forward error.
+	pushRefNeedsUpdate::
+		Shown when linkgit:git-push[1] rejects a forced update of
+		a branch when its remote-tracking ref has updates that we
+		do not have locally.
 	pushUnqualifiedRefname::
 		Shown when linkgit:git-push[1] gives up trying to
 		guess based on the source and destination refs what
 		remote ref namespace the source belongs in, but where
 		we can still suggest that the user push to either
-		refs/heads/* or refs/tags/* based on the type of the
+		`refs/heads/*` or `refs/tags/*` based on the type of the
 		source object.
-	pushRefNeedsUpdate::
-		Shown when linkgit:git-push[1] rejects a forced update of
-		a branch when its remote-tracking ref has updates that we
-		do not have locally.
+	pushUpdateRejected::
+		Set this variable to `false` if you want to disable
+		`pushNonFFCurrent`, `pushNonFFMatching`, `pushAlreadyExists`,
+		`pushFetchFirst`, `pushNeedsForce`, and `pushRefNeedsUpdate`
+		simultaneously.
+	refSyntax::
+		Shown when the user provides an illegal ref name, to
+		tell the user about the ref syntax documentation.
+	resetNoRefresh::
+		Shown when linkgit:git-reset[1] takes more than 2
+		seconds to refresh the index after reset, to tell the user
+		that they can use the `--no-refresh` option.
+	resolveConflict::
+		Shown by various commands when conflicts
+		prevent the operation from being performed.
+	rmHints::
+		Shown on failure in the output of linkgit:git-rm[1], to
+		give directions on how to proceed from the current state.
+	sequencerInUse::
+		Shown when a sequencer command is already in progress.
 	skippedCherryPicks::
 		Shown when linkgit:git-rebase[1] skips a commit that has already
 		been cherry-picked onto the upstream branch.
@@ -65,81 +128,30 @@
 		by linkgit:git-switch[1] or
 		linkgit:git-checkout[1] when switching branches.
 	statusUoption::
-		Advise to consider using the `-u` option to linkgit:git-status[1]
-		when the command takes more than 2 seconds to enumerate untracked
-		files.
-	commitBeforeMerge::
-		Advice shown when linkgit:git-merge[1] refuses to
-		merge to avoid overwriting local changes.
-	resetNoRefresh::
-		Advice to consider using the `--no-refresh` option to
-		linkgit:git-reset[1] when the command takes more than 2 seconds
-		to refresh the index after reset.
-	resolveConflict::
-		Advice shown by various commands when conflicts
-		prevent the operation from being performed.
-	sequencerInUse::
-		Advice shown when a sequencer command is already in progress.
-	implicitIdentity::
-		Advice on how to set your identity configuration when
-		your information is guessed from the system username and
-		domain name.
-	detachedHead::
-		Advice shown when you used
-		linkgit:git-switch[1] or linkgit:git-checkout[1]
-		to move to the detached HEAD state, to instruct how to
-		create a local branch after the fact.
-	suggestDetachingHead::
-		Advice shown when linkgit:git-switch[1] refuses to detach HEAD
-		without the explicit `--detach` option.
-	checkoutAmbiguousRemoteBranchName::
-		Advice shown when the argument to
-		linkgit:git-checkout[1] and linkgit:git-switch[1]
-		ambiguously resolves to a
-		remote tracking branch on more than one remote in
-		situations where an unambiguous argument would have
-		otherwise caused a remote-tracking branch to be
-		checked out. See the `checkout.defaultRemote`
-		configuration variable for how to set a given remote
-		to be used by default in some situations where this
-		advice would be printed.
-	amWorkDir::
-		Advice that shows the location of the patch file when
-		linkgit:git-am[1] fails to apply it.
-	rmHints::
-		In case of failure in the output of linkgit:git-rm[1],
-		show directions on how to proceed from the current state.
-	addEmbeddedRepo::
-		Advice on what to do when you've accidentally added one
-		git repo inside of another.
-	ignoredHook::
-		Advice shown if a hook is ignored because the hook is not
-		set as executable.
-	waitingForEditor::
-		Print a message to the terminal whenever Git is waiting for
-		editor input from the user.
-	nestedTag::
-		Advice shown if a user attempts to recursively tag a tag object.
+		Shown when linkgit:git-status[1] takes more than 2
+		seconds to enumerate untracked files, to tell the user that
+		they can use the `-u` option.
 	submoduleAlternateErrorStrategyDie::
-		Advice shown when a submodule.alternateErrorStrategy option
+		Shown when a submodule.alternateErrorStrategy option
 		configured to "die" causes a fatal error.
+	submoduleMergeConflict::
+		Advice shown when a non-trivial submodule merge conflict is
+		encountered.
 	submodulesNotUpdated::
-		Advice shown when a user runs a submodule command that fails
+		Shown when a user runs a submodule command that fails
 		because `git submodule update --init` was not run.
-	addIgnoredFile::
-		Advice shown if a user attempts to add an ignored file to
-		the index.
-	addEmptyPathspec::
-		Advice shown if a user runs the add command without providing
-		the pathspec parameter.
+	suggestDetachingHead::
+		Shown when linkgit:git-switch[1] refuses to detach HEAD
+		without the explicit `--detach` option.
 	updateSparsePath::
-		Advice shown when either linkgit:git-add[1] or linkgit:git-rm[1]
+		Shown when either linkgit:git-add[1] or linkgit:git-rm[1]
 		is asked to update index entries outside the current sparse
 		checkout.
-	diverging::
-		Advice shown when a fast-forward is not possible.
+	waitingForEditor::
+		Shown when Git is waiting for editor input. Relevant
+		when e.g. the editor is not launched inside the terminal.
 	worktreeAddOrphan::
-		Advice shown when a user tries to create a worktree from an
-		invalid reference, to instruct how to create a new unborn
+		Shown when the user tries to create a worktree from an
+		invalid reference, to tell the user how to create a new unborn
 		branch instead.
 --
diff --git a/Documentation/config/alias.txt b/Documentation/config/alias.txt
index 01df96f..2c5db0a 100644
--- a/Documentation/config/alias.txt
+++ b/Documentation/config/alias.txt
@@ -21,8 +21,23 @@
 it will be treated as a shell command.  For example, defining
 `alias.new = !gitk --all --not ORIG_HEAD`, the invocation
 `git new` is equivalent to running the shell command
-`gitk --all --not ORIG_HEAD`.  Note that shell commands will be
-executed from the top-level directory of a repository, which may
-not necessarily be the current directory.
-`GIT_PREFIX` is set as returned by running `git rev-parse --show-prefix`
-from the original current directory. See linkgit:git-rev-parse[1].
+`gitk --all --not ORIG_HEAD`.  Note:
++
+* Shell commands will be executed from the top-level directory of a
+  repository, which may not necessarily be the current directory.
+* `GIT_PREFIX` is set as returned by running `git rev-parse --show-prefix`
+  from the original current directory. See linkgit:git-rev-parse[1].
+* Shell command aliases always receive any extra arguments provided to
+  the Git command-line as positional arguments.
+** Care should be taken if your shell alias is a "one-liner" script
+   with multiple commands (e.g. in a pipeline), references multiple
+   arguments, or is otherwise not able to handle positional arguments
+   added at the end.  For example: `alias.cmd = "!echo $1 | grep $2"`
+   called as `git cmd 1 2` will be executed as 'echo $1 | grep $2
+   1 2', which is not what you want.
+** A convenient way to deal with this is to write your script
+   operations in an inline function that is then called with any
+   arguments from the command-line.  For example `alias.cmd = "!c() {
+   echo $1 | grep $2 ; }; c" will correctly execute the prior example.
+** Setting `GIT_TRACE=1` can help you debug the command being run for
+   your alias.
diff --git a/Documentation/config/clean.txt b/Documentation/config/clean.txt
index f05b940..c0188ea 100644
--- a/Documentation/config/clean.txt
+++ b/Documentation/config/clean.txt
@@ -1,3 +1,3 @@
 clean.requireForce::
-	A boolean to make git-clean do nothing unless given -f,
-	-i, or -n.  Defaults to true.
+	A boolean to make git-clean refuse to delete files unless -f
+	is given. Defaults to true.
diff --git a/Documentation/config/clone.txt b/Documentation/config/clone.txt
index d037b57..0a10efd 100644
--- a/Documentation/config/clone.txt
+++ b/Documentation/config/clone.txt
@@ -1,13 +1,23 @@
-clone.defaultRemoteName::
+`clone.defaultRemoteName`::
 	The name of the remote to create when cloning a repository.  Defaults to
-	`origin`, and can be overridden by passing the `--origin` command-line
+	`origin`.
+ifdef::git-clone[]
+	It can be overridden by passing the `--origin` command-line
+	option.
+endif::[]
+ifndef::git-clone[]
+	It can be overridden by passing the `--origin` command-line
 	option to linkgit:git-clone[1].
+endif::[]
 
-clone.rejectShallow::
+`clone.rejectShallow`::
 	Reject cloning a repository if it is a shallow one; this can be overridden by
-	passing the `--reject-shallow` option on the command line. See linkgit:git-clone[1]
+	passing the `--reject-shallow` option on the command line.
+ifndef::git-clone[]
+	See linkgit:git-clone[1].
+endif::[]
 
-clone.filterSubmodules::
+`clone.filterSubmodules`::
 	If a partial clone filter is provided (see `--filter` in
 	linkgit:git-rev-list[1]) and `--recurse-submodules` is used, also apply
 	the filter to submodules.
diff --git a/Documentation/config/core.txt b/Documentation/config/core.txt
index 0e8c283..93d65e1 100644
--- a/Documentation/config/core.txt
+++ b/Documentation/config/core.txt
@@ -520,6 +520,7 @@
 	`GIT_EDITOR` is not set.  See linkgit:git-var[1].
 
 core.commentChar::
+core.commentString::
 	Commands such as `commit` and `tag` that let you edit
 	messages consider a line that begins with this character
 	commented, and removes them after the editor returns
@@ -527,6 +528,20 @@
 +
 If set to "auto", `git-commit` would select a character that is not
 the beginning character of any line in existing commit messages.
++
+Note that these two variables are aliases of each other, and in modern
+versions of Git you are free to use a string (e.g., `//` or `⁑⁕⁑`) with
+`commentChar`. Versions of Git prior to v2.45.0 will ignore
+`commentString` but will reject a value of `commentChar` that consists
+of more than a single ASCII byte. If you plan to use your config with
+older and newer versions of Git, you may want to specify both:
++
+    [core]
+    # single character for older versions
+    commentChar = "#"
+    # string for newer versions (which will override commentChar
+    # because it comes later in the file)
+    commentString = "//"
 
 core.filesRefLockTimeout::
 	The length of time, in milliseconds, to retry when trying to
@@ -688,7 +703,7 @@
 	will not overwrite existing objects.
 +
 On some file system/operating system combinations, this is unreliable.
-Set this config setting to 'rename' there; However, This will remove the
+Set this config setting to 'rename' there; however, this will remove the
 check that makes sure that existing object files will not get overwritten.
 
 core.notesRef::
diff --git a/Documentation/config/diff.txt b/Documentation/config/diff.txt
index bd5ae0c..5ce7b91 100644
--- a/Documentation/config/diff.txt
+++ b/Documentation/config/diff.txt
@@ -108,9 +108,15 @@
 `git diff --no-index a b`;;
 	compares two non-git things (1) and (2).
 
-diff.noprefix::
+diff.noPrefix::
 	If set, 'git diff' does not show any source or destination prefix.
 
+diff.srcPrefix::
+	If set, 'git diff' uses this source prefix. Defaults to "a/".
+
+diff.dstPrefix::
+	If set, 'git diff' uses this destination prefix. Defaults to "b/".
+
 diff.relative::
 	If set to 'true', 'git diff' does not show changes outside of the directory
 	and show pathnames relative to the current directory.
@@ -223,5 +229,5 @@
 
 diff.colorMovedWS::
 	When moved lines are colored using e.g. the `diff.colorMoved` setting,
-	this option controls the `<mode>` how spaces are treated
-	for details of valid modes see '--color-moved-ws' in linkgit:git-diff[1].
+	this option controls the `<mode>` how spaces are treated.
+	For details of valid modes see '--color-moved-ws' in linkgit:git-diff[1].
diff --git a/Documentation/config/extensions.txt b/Documentation/config/extensions.txt
index bccaec7..38dce3d 100644
--- a/Documentation/config/extensions.txt
+++ b/Documentation/config/extensions.txt
@@ -7,6 +7,29 @@
 linkgit:git-clone[1].  Trying to change it after initialization will not
 work and will produce hard-to-diagnose issues.
 
+extensions.compatObjectFormat::
+
+	Specify a compatitbility hash algorithm to use.  The acceptable values
+	are `sha1` and `sha256`.  The value specified must be different from the
+	value of extensions.objectFormat.  This allows client level
+	interoperability between git repositories whose objectFormat matches
+	this compatObjectFormat.  In particular when fully implemented the
+	pushes and pulls from a repository in whose objectFormat matches
+	compatObjectFormat.  As well as being able to use oids encoded in
+	compatObjectFormat in addition to oids encoded with objectFormat to
+	locally specify objects.
+
+extensions.refStorage::
+	Specify the ref storage format to use. The acceptable values are:
++
+include::../ref-storage-format.txt[]
++
+It is an error to specify this key unless `core.repositoryFormatVersion` is 1.
++
+Note that this setting should only be set by linkgit:git-init[1] or
+linkgit:git-clone[1]. Trying to change it after initialization will not
+work and will produce hard-to-diagnose issues.
+
 extensions.worktreeConfig::
 	If enabled, then worktrees will load config settings from the
 	`$GIT_DIR/config.worktree` file in addition to the
diff --git a/Documentation/config/feature.txt b/Documentation/config/feature.txt
index bf9546f..f061b64 100644
--- a/Documentation/config/feature.txt
+++ b/Documentation/config/feature.txt
@@ -17,6 +17,9 @@
 +
 * `pack.useBitmapBoundaryTraversal=true` may improve bitmap traversal times by
 walking fewer objects.
++
+* `pack.allowPackReuse=multi` may improve the time it takes to create a pack by
+reusing objects from multiple packs instead of just one.
 
 feature.manyFiles::
 	Enable config options that optimize for repos with many files in the
diff --git a/Documentation/config/fetch.txt b/Documentation/config/fetch.txt
index aea5b97..d7dc461 100644
--- a/Documentation/config/fetch.txt
+++ b/Documentation/config/fetch.txt
@@ -50,6 +50,12 @@
 	refs. See also `remote.<name>.pruneTags` and the PRUNING
 	section of linkgit:git-fetch[1].
 
+fetch.all::
+	If true, fetch will attempt to update all available remotes.
+	This behavior can be overridden by passing `--no-all` or by
+	explicitly specifying one or more remote(s) to fetch from.
+	Defaults to false.
+
 fetch.output::
 	Control how ref update status is printed. Valid values are
 	`full` and `compact`. Default value is `full`. See the
diff --git a/Documentation/config/grep.txt b/Documentation/config/grep.txt
index e521f20..10041f2 100644
--- a/Documentation/config/grep.txt
+++ b/Documentation/config/grep.txt
@@ -24,5 +24,5 @@
 	If set to true, enable `--full-name` option by default.
 
 grep.fallbackToNoIndex::
-	If set to true, fall back to git grep --no-index if git grep
+	If set to true, fall back to `git grep --no-index` if `git grep`
 	is executed outside of a git repository.  Defaults to false.
diff --git a/Documentation/config/init.txt b/Documentation/config/init.txt
index 79c79d6..af03acd 100644
--- a/Documentation/config/init.txt
+++ b/Documentation/config/init.txt
@@ -1,7 +1,10 @@
-init.templateDir::
-	Specify the directory from which templates will be copied.
-	(See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)
+:see-git-init:
+ifndef::git-init[]
+:see-git-init: (See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)
+endif::[]
 
-init.defaultBranch::
+`init.templateDir`::
+	Specify the directory from which templates will be copied. {see-git-init}
+`init.defaultBranch`::
 	Allows overriding the default branch name e.g. when initializing
 	a new repository.
diff --git a/Documentation/config/interactive.txt b/Documentation/config/interactive.txt
index a2d3c7e..5cc2655 100644
--- a/Documentation/config/interactive.txt
+++ b/Documentation/config/interactive.txt
@@ -4,9 +4,7 @@
 	Currently this is used by the `--patch` mode of
 	linkgit:git-add[1], linkgit:git-checkout[1],
 	linkgit:git-restore[1], linkgit:git-commit[1],
-	linkgit:git-reset[1], and linkgit:git-stash[1]. Note that this
-	setting is silently ignored if portable keystroke input
-	is not available; requires the Perl module Term::ReadKey.
+	linkgit:git-reset[1], and linkgit:git-stash[1].
 
 interactive.diffFilter::
 	When an interactive command (such as `git add --patch`) shows
diff --git a/Documentation/config/mergetool.txt b/Documentation/config/mergetool.txt
index 294f61e..00bf665 100644
--- a/Documentation/config/mergetool.txt
+++ b/Documentation/config/mergetool.txt
@@ -45,14 +45,21 @@
 	value of `false` avoids using `--auto-merge` altogether, and is the
 	default value.
 
-mergetool.vimdiff.layout::
-	The vimdiff backend uses this variable to control how its split
-	windows appear. Applies even if you are using Neovim (`nvim`) or
-	gVim (`gvim`) as the merge tool. See BACKEND SPECIFIC HINTS section
-ifndef::git-mergetool[]
-	in linkgit:git-mergetool[1].
+mergetool.<vimdiff variant>.layout::
+	Configure the split window layout for vimdiff's `<variant>`, which is any of `vimdiff`,
+	`nvimdiff`, `gvimdiff`.
+	Upon launching `git mergetool` with `--tool=<variant>` (or without `--tool`
+	if `merge.tool` is configured as `<variant>`), Git will consult
+	`mergetool.<variant>.layout` to determine the tool's layout. If the
+	variant-specific configuration is not available, `vimdiff`'s is used as
+	fallback.  If that too is not available, a default layout with 4 windows
+	will be used.  To configure the layout, see the `BACKEND SPECIFIC HINTS`
+ifdef::git-mergetool[]
+	section.
 endif::[]
-	for details.
+ifndef::git-mergetool[]
+	section in linkgit:git-mergetool[1].
+endif::[]
 
 mergetool.hideResolved::
 	During a merge, Git will automatically resolve as many conflicts as
diff --git a/Documentation/config/pack.txt b/Documentation/config/pack.txt
index f50df9d..da52737 100644
--- a/Documentation/config/pack.txt
+++ b/Documentation/config/pack.txt
@@ -28,11 +28,16 @@
 to linkgit:git-repack[1].
 
 pack.allowPackReuse::
-	When true, and when reachability bitmaps are enabled,
-	pack-objects will try to send parts of the bitmapped packfile
-	verbatim. This can reduce memory and CPU usage to serve fetches,
-	but might result in sending a slightly larger pack. Defaults to
-	true.
+	When true or "single", and when reachability bitmaps are
+	enabled, pack-objects will try to send parts of the bitmapped
+	packfile verbatim. When "multi", and when a multi-pack
+	reachability bitmap is available, pack-objects will try to send
+	parts of all packs in the MIDX.
++
+If only a single pack bitmap is available, and `pack.allowPackReuse`
+is set to "multi", reuse parts of just the bitmapped packfile. This
+can reduce memory and CPU usage to serve fetches, but might result in
+sending a slightly larger pack. Defaults to true.
 
 pack.island::
 	An extended regular expression configuring a set of delta
diff --git a/Documentation/config/promisor.txt b/Documentation/config/promisor.txt
new file mode 100644
index 0000000..98c5cb2
--- /dev/null
+++ b/Documentation/config/promisor.txt
@@ -0,0 +1,3 @@
+promisor.quiet::
+	If set to "true" assume `--quiet` when fetching additional
+	objects for a partial clone.
diff --git a/Documentation/config/rebase.txt b/Documentation/config/rebase.txt
index 7c57c5e..c6187ab 100644
--- a/Documentation/config/rebase.txt
+++ b/Documentation/config/rebase.txt
@@ -9,7 +9,9 @@
 	rebase. False by default.
 
 rebase.autoSquash::
-	If set to true enable `--autosquash` option by default.
+	If set to true, enable the `--autosquash` option of
+	linkgit:git-rebase[1] by default for interactive mode.
+	This can be overridden with the `--no-autosquash` option.
 
 rebase.autoStash::
 	When set to true, automatically create a temporary stash entry
diff --git a/Documentation/config/receive.txt b/Documentation/config/receive.txt
index c77e55b..36a1e6f 100644
--- a/Documentation/config/receive.txt
+++ b/Documentation/config/receive.txt
@@ -8,7 +8,7 @@
 	capability to its clients. False by default.
 
 receive.autogc::
-	By default, git-receive-pack will run "git-gc --auto" after
+	By default, git-receive-pack will run "git maintenance run --auto" after
 	receiving data from git-push and updating refs.  You can stop
 	it by setting this variable to false.
 
diff --git a/Documentation/config/reftable.txt b/Documentation/config/reftable.txt
new file mode 100644
index 0000000..0515727
--- /dev/null
+++ b/Documentation/config/reftable.txt
@@ -0,0 +1,48 @@
+reftable.blockSize::
+	The size in bytes used by the reftable backend when writing blocks.
+	The block size is determined by the writer, and does not have to be a
+	power of 2. The block size must be larger than the longest reference
+	name or log entry used in the repository, as references cannot span
+	blocks.
++
+Powers of two that are friendly to the virtual memory system or
+filesystem (such as 4kB or 8kB) are recommended. Larger sizes (64kB) can
+yield better compression, with a possible increased cost incurred by
+readers during access.
++
+The largest block size is `16777215` bytes (15.99 MiB). The default value is
+`4096` bytes (4kB). A value of `0` will use the default value.
+
+reftable.restartInterval::
+	The interval at which to create restart points. The reftable backend
+	determines the restart points at file creation. Every 16 may be
+	more suitable for smaller block sizes (4k or 8k), every 64 for larger
+	block sizes (64k).
++
+More frequent restart points reduces prefix compression and increases
+space consumed by the restart table, both of which increase file size.
++
+Less frequent restart points makes prefix compression more effective,
+decreasing overall file size, with increased penalties for readers
+walking through more records after the binary search step.
++
+A maximum of `65535` restart points per block is supported.
++
+The default value is to create restart points every 16 records. A value of `0`
+will use the default value.
+
+reftable.indexObjects::
+	Whether the reftable backend shall write object blocks. Object blocks
+	are a reverse mapping of object ID to the references pointing to them.
++
+The default value is `true`.
+
+reftable.geometricFactor::
+	Whenever the reftable backend appends a new table to the stack, it
+	performs auto compaction to ensure that there is only a handful of
+	tables. The backend does this by ensuring that tables form a geometric
+	sequence regarding the respective sizes of each table.
++
+By default, the geometric sequence uses a factor of 2, meaning that for any
+table, the next-biggest table must at least be twice as big. A maximum factor
+of 256 is supported.
diff --git a/Documentation/config/safe.txt b/Documentation/config/safe.txt
index 577df40..2d45c98 100644
--- a/Documentation/config/safe.txt
+++ b/Documentation/config/safe.txt
@@ -44,7 +44,8 @@
 directory was listed in the `safe.directory` list. If `safe.directory=*`
 is set in system config and you want to re-enable this protection, then
 initialize your list with an empty value before listing the repositories
-that you deem safe.
+that you deem safe.  Giving a directory with `/*` appended to it will
+allow access to all repositories under the named directory.
 +
 As explained, Git only allows you to access repositories owned by
 yourself, i.e. the user who is running Git, by default.  When Git
diff --git a/Documentation/config/sendemail.txt b/Documentation/config/sendemail.txt
index 7fc770e..6a869d6 100644
--- a/Documentation/config/sendemail.txt
+++ b/Documentation/config/sendemail.txt
@@ -8,7 +8,7 @@
 	See linkgit:git-send-email[1] for description.  Note that this
 	setting is not subject to the 'identity' mechanism.
 
-sendemail.smtpsslcertpath::
+sendemail.smtpSSLCertPath::
 	Path to ca-certificates (either a directory or a single file).
 	Set it to an empty string to disable certificate verification.
 
@@ -62,12 +62,12 @@
 sendemail.envelopeSender::
 sendemail.from::
 sendemail.headerCmd::
-sendemail.signedoffbycc::
+sendemail.signedOffByCc::
 sendemail.smtpPass::
-sendemail.suppresscc::
+sendemail.suppressCc::
 sendemail.suppressFrom::
 sendemail.to::
-sendemail.tocmd::
+sendemail.toCmd::
 sendemail.smtpDomain::
 sendemail.smtpServer::
 sendemail.smtpServerPort::
@@ -81,8 +81,8 @@
 	linkgit:git-send-email[1] command-line options. See its
 	documentation for details.
 
-sendemail.signedoffcc (deprecated)::
-	Deprecated alias for `sendemail.signedoffbycc`.
+sendemail.signedOffCc (deprecated)::
+	Deprecated alias for `sendemail.signedOffByCc`.
 
 sendemail.smtpBatchSize::
 	Number of messages to be sent per connection, after that a relogin
diff --git a/Documentation/config/status.txt b/Documentation/config/status.txt
index 2ff8237..8caf90f 100644
--- a/Documentation/config/status.txt
+++ b/Documentation/config/status.txt
@@ -57,6 +57,8 @@
 --
 +
 If this variable is not specified, it defaults to 'normal'.
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 This variable can be overridden with the -u|--untracked-files option
 of linkgit:git-status[1] and linkgit:git-commit[1].
 
diff --git a/Documentation/config/transfer.txt b/Documentation/config/transfer.txt
index a9cbdb8..f1ce50f 100644
--- a/Documentation/config/transfer.txt
+++ b/Documentation/config/transfer.txt
@@ -121,3 +121,7 @@
 	information from the remote server (if advertised) and download
 	bundles before continuing the clone through the Git protocol.
 	Defaults to `false`.
+
+transfer.advertiseObjectInfo::
+	When `true`, the `object-info` capability is advertised by
+	servers. Defaults to false.
diff --git a/Documentation/date-formats.txt b/Documentation/date-formats.txt
index 67645ca..e24517c 100644
--- a/Documentation/date-formats.txt
+++ b/Documentation/date-formats.txt
@@ -11,7 +11,7 @@
 	For example CET (which is 1 hour ahead of UTC) is `+0100`.
 
 RFC 2822::
-	The standard email format as described by RFC 2822, for example
+	The standard date format as described by RFC 2822, for example
 	`Thu, 07 Apr 2005 22:13:13 +0200`.
 
 ISO 8601::
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 53ec3c9..c7df20e 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -299,7 +299,7 @@
 	Synonym for --dirstat=cumulative
 
 --dirstat-by-file[=<param1,param2>...]::
-	Synonym for --dirstat=files,param1,param2...
+	Synonym for --dirstat=files,<param1>,<param2>...
 
 --summary::
 	Output a condensed summary of extended header information
@@ -329,12 +329,13 @@
 linkgit:git-config[1]).
 
 --name-only::
-	Show only names of changed files. The file names are often encoded in UTF-8.
+	Show only the name of each changed file in the post-image tree.
+	The file names are often encoded in UTF-8.
 	For more information see the discussion about encoding in the linkgit:git-log[1]
 	manual page.
 
 --name-status::
-	Show only names and status of changed files. See the description
+	Show only the name(s) and status of each changed file. See the description
 	of the `--diff-filter` option on what the status letters mean.
 	Just like `--name-only` the file names are often encoded in UTF-8.
 
@@ -865,8 +866,9 @@
 
 --default-prefix::
 	Use the default source and destination prefixes ("a/" and "b/").
-	This is usually the default already, but may be used to override
-	config such as `diff.noprefix`.
+	This overrides configuration variables such as `diff.noprefix`,
+	`diff.srcPrefix`, `diff.dstPrefix`, and `diff.mnemonicPrefix`
+	(see `git-config`(1)).
 
 --line-prefix=<prefix>::
 	Prepend an additional prefix to every line of output.
diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
index a1d6633..e22b217 100644
--- a/Documentation/fetch-options.txt
+++ b/Documentation/fetch-options.txt
@@ -1,5 +1,6 @@
---all::
-	Fetch all remotes.
+--[no-]all::
+	Fetch all remotes. This overrides the configuration variable
+	`fetch.all`.
 
 -a::
 --append::
@@ -201,7 +202,7 @@
 	destination of an explicit refspec; see `--prune`).
 
 ifndef::git-pull[]
---recurse-submodules[=yes|on-demand|no]::
+--recurse-submodules[=(yes|on-demand|no)]::
 	This option controls if and under what conditions new commits of
 	submodules should be fetched too. When recursing through submodules,
 	`git fetch` always attempts to fetch "changed" submodules, that is, a
diff --git a/Documentation/git-add.txt b/Documentation/git-add.txt
index 3d2e670..aceaa02 100644
--- a/Documentation/git-add.txt
+++ b/Documentation/git-add.txt
@@ -63,7 +63,7 @@
 	to ignore removed files; use `--no-all` option if you want
 	to add modified or new files but ignore removed ones.
 +
-For more details about the <pathspec> syntax, see the 'pathspec' entry
+For more details about the _<pathspec>_ syntax, see the 'pathspec' entry
 in linkgit:gitglossary[7].
 
 -n::
@@ -119,10 +119,10 @@
 -u::
 --update::
 	Update the index just where it already has an entry matching
-	<pathspec>.  This removes as well as modifies index entries to
+	_<pathspec>_.  This removes as well as modifies index entries to
 	match the working tree, but adds no new files.
 +
-If no <pathspec> is given when `-u` option is used, all
+If no _<pathspec>_ is given when `-u` option is used, all
 tracked files in the entire working tree are updated (old versions
 of Git used to limit the update to the current directory and its
 subdirectories).
@@ -131,11 +131,11 @@
 --all::
 --no-ignore-removal::
 	Update the index not only where the working tree has a file
-	matching <pathspec> but also where the index already has an
+	matching _<pathspec>_ but also where the index already has an
 	entry. This adds, modifies, and removes index entries to
 	match the working tree.
 +
-If no <pathspec> is given when `-A` option is used, all
+If no _<pathspec>_ is given when `-A` option is used, all
 files in the entire working tree are updated (old versions
 of Git used to limit the update to the current directory and its
 subdirectories).
@@ -145,11 +145,11 @@
 	Update the index by adding new files that are unknown to the
 	index and files modified in the working tree, but ignore
 	files that have been removed from the working tree.  This
-	option is a no-op when no <pathspec> is used.
+	option is a no-op when no _<pathspec>_ is used.
 +
 This option is primarily to help users who are used to older
-versions of Git, whose "git add <pathspec>..." was a synonym
-for "git add --no-all <pathspec>...", i.e. ignored removed files.
+versions of Git, whose "git add _<pathspec>_..." was a synonym
+for "git add --no-all _<pathspec>_...", i.e. ignored removed files.
 
 -N::
 --intent-to-add::
@@ -198,8 +198,8 @@
 	unchanged.
 
 --pathspec-from-file=<file>::
-	Pathspec is passed in `<file>` instead of commandline args. If
-	`<file>` is exactly `-` then standard input is used. Pathspec
+	Pathspec is passed in _<file>_ instead of commandline args. If
+	_<file>_ is exactly `-` then standard input is used. Pathspec
 	elements are separated by LF or CR/LF. Pathspec elements can be
 	quoted as explained for the configuration variable `core.quotePath`
 	(see linkgit:git-config[1]). See also `--pathspec-file-nul` and
@@ -348,6 +348,7 @@
        K - leave this hunk undecided, see previous hunk
        s - split the current hunk into smaller hunks
        e - manually edit the current hunk
+       p - print the current hunk
        ? - print help
 +
 After deciding the fate for all hunks, if there is any hunk
diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index a051af1..69d5cc9 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -66,13 +66,19 @@
 --quoted-cr=<action>::
 	This flag will be passed down to 'git mailinfo' (see linkgit:git-mailinfo[1]).
 
---empty=(stop|drop|keep)::
-	By default, or when the option is set to 'stop', the command
-	errors out on an input e-mail message lacking a patch
-	and stops in the middle of the current am session. When this
-	option is set to 'drop', skip such an e-mail message instead.
-	When this option is set to 'keep', create an empty commit,
-	recording the contents of the e-mail message as its log.
+--empty=(drop|keep|stop)::
+	How to handle an e-mail message lacking a patch:
++
+--
+`drop`;;
+	The e-mail message will be skipped.
+`keep`;;
+	An empty commit will be created, with the contents of the e-mail
+	message as its log.
+`stop`;;
+	The command will fail, stopping in the middle of the current `am`
+	session. This is the default behavior.
+--
 
 -m::
 --message-id::
@@ -128,6 +134,9 @@
 	These flags are passed to the 'git apply' (see linkgit:git-apply[1])
 	program that applies
 	the patch.
++
+Valid <action> for the `--whitespace` option are:
+`nowarn`, `warn`, `fix`, `error`, and `error-all`.
 
 --patch-format::
 	By default the command will try to detect the patch format
diff --git a/Documentation/git-bisect.txt b/Documentation/git-bisect.txt
index a0e75a6..82f944d 100644
--- a/Documentation/git-bisect.txt
+++ b/Documentation/git-bisect.txt
@@ -17,7 +17,7 @@
 on the subcommand:
 
  git bisect start [--term-(bad|new)=<term-new> --term-(good|old)=<term-old>]
-		  [--no-checkout] [--first-parent] [<bad> [<good>...]] [--] [<paths>...]
+		  [--no-checkout] [--first-parent] [<bad> [<good>...]] [--] [<pathspec>...]
  git bisect (bad|new|<term-new>) [<rev>]
  git bisect (good|old|<term-old>) [<rev>...]
  git bisect terms [--term-(good|old) | --term-(bad|new)]
@@ -301,7 +301,7 @@
 
 You can further cut down the number of trials, if you know what part of
 the tree is involved in the problem you are tracking down, by specifying
-path parameters when issuing the `bisect start` command:
+pathspec parameters when issuing the `bisect start` command:
 
 ------------
 $ git bisect start -- arch/i386 include/asm-i386
diff --git a/Documentation/git-blame.txt b/Documentation/git-blame.txt
index 5720d04..b1d7fb5 100644
--- a/Documentation/git-blame.txt
+++ b/Documentation/git-blame.txt
@@ -210,7 +210,7 @@
 
 . Each blame entry always starts with a line of:
 
-	<40-byte hex sha1> <sourceline> <resultline> <num_lines>
+	<40-byte-hex-sha1> <sourceline> <resultline> <num-lines>
 +
 Line numbers count from 1.
 
diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index 4395aa9..0b08442 100644
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -312,7 +312,8 @@
 	option is omitted, the current HEAD will be used instead.
 
 <oldbranch>::
-	The name of an existing branch to rename.
+	The name of an existing branch.  If this option is omitted,
+	the name of the current branch will be used instead.
 
 <newbranch>::
 	The new name for an existing branch. The same restrictions as for
diff --git a/Documentation/git-bugreport.txt b/Documentation/git-bugreport.txt
index 392d9eb..112658b 100644
--- a/Documentation/git-bugreport.txt
+++ b/Documentation/git-bugreport.txt
@@ -8,7 +8,8 @@
 SYNOPSIS
 --------
 [verse]
-'git bugreport' [(-o | --output-directory) <path>] [(-s | --suffix) <format>]
+'git bugreport' [(-o | --output-directory) <path>]
+		[(-s | --suffix) <format> | --no-suffix]
 		[--diagnose[=<mode>]]
 
 DESCRIPTION
@@ -51,16 +52,19 @@
 
 -s <format>::
 --suffix <format>::
+--no-suffix::
 	Specify an alternate suffix for the bugreport name, to create a file
-	named 'git-bugreport-<formatted suffix>'. This should take the form of a
+	named 'git-bugreport-<formatted-suffix>'. This should take the form of a
 	strftime(3) format string; the current local time will be used.
+	`--no-suffix` disables the suffix and the file is just named
+	`git-bugreport` without any disambiguation measure.
 
 --no-diagnose::
 --diagnose[=<mode>]::
 	Create a zip archive of supplemental information about the user's
 	machine, Git client, and repository state. The archive is written to the
 	same output directory as the bug report and is named
-	'git-diagnostics-<formatted suffix>'.
+	'git-diagnostics-<formatted-suffix>'.
 +
 Without `mode` specified, the diagnostic archive will contain the default set of
 statistics reported by `git diagnose`. An optional `mode` value may be specified
diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt
index 26ad1a5..8bdfa54 100644
--- a/Documentation/git-checkout.txt
+++ b/Documentation/git-checkout.txt
@@ -63,7 +63,9 @@
 ------------
 +
 that is to say, the branch is not reset/created unless "git checkout" is
-successful.
+successful (e.g., when the branch is in use in another worktree, not
+just the current branch stays the same, but the branch is not reset to
+the start-point, either).
 
 'git checkout' --detach [<branch>]::
 'git checkout' [--detach] <commit>::
diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index fdcad3d..81ace90 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -131,20 +131,36 @@
 	even without this option.  Note also, that use of this option only
 	keeps commits that were initially empty (i.e. the commit recorded the
 	same tree as its parent).  Commits which are made empty due to a
-	previous commit are dropped.  To force the inclusion of those commits
-	use `--keep-redundant-commits`.
+	previous commit will cause the cherry-pick to fail.  To force the
+	inclusion of those commits, use `--empty=keep`.
 
 --allow-empty-message::
 	By default, cherry-picking a commit with an empty message will fail.
 	This option overrides that behavior, allowing commits with empty
 	messages to be cherry picked.
 
+--empty=(drop|keep|stop)::
+	How to handle commits being cherry-picked that are redundant with
+	changes already in the current history.
++
+--
+`drop`;;
+	The commit will be dropped.
+`keep`;;
+	The commit will be kept. Implies `--allow-empty`.
+`stop`;;
+	The cherry-pick will stop when the commit is applied, allowing
+	you to examine the commit. This is the default behavior.
+--
++
+Note that `--empty=drop` and `--empty=stop` only specify how to handle a
+commit that was not initially empty, but rather became empty due to a previous
+commit. Commits that were initially empty will still cause the cherry-pick to
+fail unless one of `--empty=keep` or `--allow-empty` are specified.
++
+
 --keep-redundant-commits::
-	If a commit being cherry picked duplicates a commit already in the
-	current history, it will become empty.  By default these
-	redundant commits cause `cherry-pick` to stop so the user can
-	examine the commit. This option overrides that behavior and
-	creates an empty commit object.  Implies `--allow-empty`.
+	Deprecated synonym for `--empty=keep`.
 
 --strategy=<strategy>::
 	Use the given merge strategy.  Should only be used once.
diff --git a/Documentation/git-clean.txt b/Documentation/git-clean.txt
index 69331e3..fd17165 100644
--- a/Documentation/git-clean.txt
+++ b/Documentation/git-clean.txt
@@ -37,7 +37,7 @@
 --force::
 	If the Git configuration variable clean.requireForce is not set
 	to false, 'git clean' will refuse to delete files or directories
-	unless given -f or -i.  Git will refuse to modify untracked
+	unless given -f.  Git will refuse to modify untracked
 	nested git repositories (directories with a .git subdirectory)
 	unless a second -f is given.
 
@@ -45,10 +45,14 @@
 --interactive::
 	Show what would be done and clean files interactively. See
 	``Interactive mode'' for details.
+	Configuration variable `clean.requireForce` is ignored, as
+	this mode gives its own safety protection by going interactive.
 
 -n::
 --dry-run::
 	Don't actually remove anything, just show what would be done.
+	Configuration variable `clean.requireForce` is ignored, as
+	nothing will be deleted anyway.
 
 -q::
 --quiet::
diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index c37c4a3..5de18de 100644
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -9,15 +9,15 @@
 SYNOPSIS
 --------
 [verse]
-'git clone' [--template=<template-directory>]
-	  [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
-	  [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
-	  [--dissociate] [--separate-git-dir <git-dir>]
-	  [--depth <depth>] [--[no-]single-branch] [--no-tags]
-	  [--recurse-submodules[=<pathspec>]] [--[no-]shallow-submodules]
-	  [--[no-]remote-submodules] [--jobs <n>] [--sparse] [--[no-]reject-shallow]
-	  [--filter=<filter> [--also-filter-submodules]] [--] <repository>
-	  [<directory>]
+`git clone` [++--template=++__<template-directory>__]
+	  [`-l`] [`-s`] [`--no-hardlinks`] [`-q`] [`-n`] [`--bare`] [`--mirror`]
+	  [`-o` _<name>_] [`-b` _<name>_] [`-u` _<upload-pack>_] [`--reference` _<repository>_]
+	  [`--dissociate`] [`--separate-git-dir` _<git-dir>_]
+	  [`--depth` _<depth>_] [`--`[`no-`]`single-branch`] [`--no-tags`]
+	  [++--recurse-submodules++[++=++__<pathspec>__]] [`--`[`no-`]`shallow-submodules`]
+	  [`--`[`no-`]`remote-submodules`] [`--jobs` _<n>_] [`--sparse`] [`--`[`no-`]`reject-shallow`]
+	  [++--filter=++__<filter-spec>__] [`--also-filter-submodules`]] [`--`] _<repository>_
+	  [_<directory>_]
 
 DESCRIPTION
 -----------
@@ -31,7 +31,7 @@
 After the clone, a plain `git fetch` without arguments will update
 all the remote-tracking branches, and a `git pull` without
 arguments will in addition merge the remote master branch into the
-current master branch, if any (this is untrue when "--single-branch"
+current master branch, if any (this is untrue when `--single-branch`
 is given; see below).
 
 This default configuration is achieved by creating references to
@@ -42,12 +42,12 @@
 
 OPTIONS
 -------
--l::
---local::
+`-l`::
+`--local`::
 	When the repository to clone from is on a local machine,
 	this flag bypasses the normal "Git aware" transport
 	mechanism and clones the repository by making a copy of
-	HEAD and everything under objects and refs directories.
+	`HEAD` and everything under objects and refs directories.
 	The files under `.git/objects/` directory are hardlinked
 	to save space when possible.
 +
@@ -67,14 +67,14 @@
 source repository, similar to running `cp -r src dst` while modifying
 `src`.
 
---no-hardlinks::
+`--no-hardlinks`::
 	Force the cloning process from a repository on a local
 	filesystem to copy the files under the `.git/objects`
 	directory instead of using hardlinks. This may be desirable
 	if you are trying to make a back-up of your repository.
 
--s::
---shared::
+`-s`::
+`--shared`::
 	When the repository to clone is on the local machine,
 	instead of using hard links, automatically setup
 	`.git/objects/info/alternates` to share the objects
@@ -101,10 +101,10 @@
 its source repository, you can simply run `git repack -a` to copy all
 objects from the source repository into a pack in the cloned repository.
 
---reference[-if-able] <repository>::
-	If the reference repository is on the local machine,
+`--reference`[`-if-able`] _<repository>_::
+	If the reference _<repository>_ is on the local machine,
 	automatically setup `.git/objects/info/alternates` to
-	obtain objects from the reference repository.  Using
+	obtain objects from the reference _<repository>_.  Using
 	an already existing repository as an alternate will
 	require fewer objects to be copied from the repository
 	being cloned, reducing network and local storage costs.
@@ -115,7 +115,7 @@
 *NOTE*: see the NOTE for the `--shared` option, and also the
 `--dissociate` option.
 
---dissociate::
+`--dissociate`::
 	Borrow the objects from reference repositories specified
 	with the `--reference` options only to reduce network
 	transfer, and stop borrowing from them after a clone is made
@@ -126,43 +126,43 @@
 	same repository, and this option can be used to stop the
 	borrowing.
 
--q::
---quiet::
+`-q`::
+`--quiet`::
 	Operate quietly.  Progress is not reported to the standard
 	error stream.
 
--v::
---verbose::
+`-v`::
+`--verbose`::
 	Run verbosely. Does not affect the reporting of progress status
 	to the standard error stream.
 
---progress::
+`--progress`::
 	Progress status is reported on the standard error stream
 	by default when it is attached to a terminal, unless `--quiet`
 	is specified. This flag forces progress status even if the
 	standard error stream is not directed to a terminal.
 
---server-option=<option>::
+++--server-option=++__<option>__::
 	Transmit the given string to the server when communicating using
 	protocol version 2.  The given string must not contain a NUL or LF
 	character.  The server's handling of server options, including
 	unknown ones, is server-specific.
-	When multiple `--server-option=<option>` are given, they are all
+	When multiple ++--server-option=++__<option>__ are given, they are all
 	sent to the other side in the order listed on the command line.
 
--n::
---no-checkout::
+`-n`::
+`--no-checkout`::
 	No checkout of HEAD is performed after the clone is complete.
 
---[no-]reject-shallow::
+`--`[`no-`]`reject-shallow`::
 	Fail if the source repository is a shallow repository.
-	The 'clone.rejectShallow' configuration variable can be used to
+	The `clone.rejectShallow` configuration variable can be used to
 	specify the default.
 
---bare::
+`--bare`::
 	Make a 'bare' Git repository.  That is, instead of
-	creating `<directory>` and placing the administrative
-	files in `<directory>/.git`, make the `<directory>`
+	creating _<directory>_ and placing the administrative
+	files in _<directory>_`/.git`, make the _<directory>_
 	itself the `$GIT_DIR`. This obviously implies the `--no-checkout`
 	because there is nowhere to check out the working tree.
 	Also the branch heads at the remote are copied directly
@@ -171,28 +171,28 @@
 	used, neither remote-tracking branches nor the related
 	configuration variables are created.
 
---sparse::
+`--sparse`::
 	Employ a sparse-checkout, with only files in the toplevel
 	directory initially being present.  The
 	linkgit:git-sparse-checkout[1] command can be used to grow the
 	working directory as needed.
 
---filter=<filter-spec>::
+++--filter=++__<filter-spec>__::
 	Use the partial clone feature and request that the server sends
 	a subset of reachable objects according to a given object filter.
-	When using `--filter`, the supplied `<filter-spec>` is used for
+	When using `--filter`, the supplied _<filter-spec>_ is used for
 	the partial clone filter. For example, `--filter=blob:none` will
 	filter out all blobs (file contents) until needed by Git. Also,
-	`--filter=blob:limit=<size>` will filter out all blobs of size
-	at least `<size>`. For more details on filter specifications, see
+	++--filter=blob:limit=++__<size>__ will filter out all blobs of size
+	at least _<size>_. For more details on filter specifications, see
 	the `--filter` option in linkgit:git-rev-list[1].
 
---also-filter-submodules::
+`--also-filter-submodules`::
 	Also apply the partial clone filter to any submodules in the repository.
 	Requires `--filter` and `--recurse-submodules`. This can be turned on by
 	default by setting the `clone.filterSubmodules` config option.
 
---mirror::
+`--mirror`::
 	Set up a mirror of the source repository.  This implies `--bare`.
 	Compared to `--bare`, `--mirror` not only maps local branches of the
 	source to local branches of the target, it maps all refs (including
@@ -200,37 +200,37 @@
 	that all these refs are overwritten by a `git remote update` in the
 	target repository.
 
--o <name>::
---origin <name>::
+`-o` _<name>_::
+`--origin` _<name>_::
 	Instead of using the remote name `origin` to keep track of the upstream
-	repository, use `<name>`.  Overrides `clone.defaultRemoteName` from the
+	repository, use _<name>_.  Overrides `clone.defaultRemoteName` from the
 	config.
 
--b <name>::
---branch <name>::
+`-b` _<name>_::
+`--branch` _<name>_::
 	Instead of pointing the newly created HEAD to the branch pointed
-	to by the cloned repository's HEAD, point to `<name>` branch
+	to by the cloned repository's HEAD, point to _<name>_ branch
 	instead. In a non-bare repository, this is the branch that will
 	be checked out.
 	`--branch` can also take tags and detaches the HEAD at that commit
 	in the resulting repository.
 
--u <upload-pack>::
---upload-pack <upload-pack>::
+`-u` _<upload-pack>_::
+`--upload-pack` _<upload-pack>_::
 	When given, and the repository to clone from is accessed
 	via ssh, this specifies a non-default path for the command
 	run on the other end.
 
---template=<template-directory>::
+++--template=++__<template-directory>__::
 	Specify the directory from which templates will be used;
 	(See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)
 
--c <key>=<value>::
---config <key>=<value>::
+`-c` __<key>__++=++__<value>__::
+`--config` __<key>__++=++__<value>__::
 	Set a configuration variable in the newly-created repository;
 	this takes effect immediately after the repository is
 	initialized, but before the remote history is fetched or any
-	files checked out.  The key is in the same format as expected by
+	files checked out.  The _<key>_ is in the same format as expected by
 	linkgit:git-config[1] (e.g., `core.eol=true`). If multiple
 	values are given for the same key, each value will be written to
 	the config file. This makes it safe, for example, to add
@@ -239,35 +239,35 @@
 Due to limitations of the current implementation, some configuration
 variables do not take effect until after the initial fetch and checkout.
 Configuration variables known to not take effect are:
-`remote.<name>.mirror` and `remote.<name>.tagOpt`.  Use the
+++remote.++__<name>__++.mirror++ and ++remote.++__<name>__++.tagOpt++.  Use the
 corresponding `--mirror` and `--no-tags` options instead.
 
---depth <depth>::
+`--depth` _<depth>_::
 	Create a 'shallow' clone with a history truncated to the
 	specified number of commits. Implies `--single-branch` unless
 	`--no-single-branch` is given to fetch the histories near the
 	tips of all branches. If you want to clone submodules shallowly,
 	also pass `--shallow-submodules`.
 
---shallow-since=<date>::
+++--shallow-since=++__<date>__::
 	Create a shallow clone with a history after the specified time.
 
---shallow-exclude=<revision>::
+++--shallow-exclude=++__<revision>__::
 	Create a shallow clone with a history, excluding commits
 	reachable from a specified remote branch or tag.  This option
 	can be specified multiple times.
 
---[no-]single-branch::
+`--`[`no-`]`single-branch`::
 	Clone only the history leading to the tip of a single branch,
 	either specified by the `--branch` option or the primary
 	branch remote's `HEAD` points at.
 	Further fetches into the resulting repository will only update the
 	remote-tracking branch for the branch this option was used for the
-	initial cloning.  If the HEAD at the remote did not point at any
+	initial cloning.  If the `HEAD` at the remote did not point at any
 	branch when `--single-branch` clone was made, no remote-tracking
 	branch is created.
 
---no-tags::
+`--no-tags`::
 	Don't clone any tags, and set
 	`remote.<remote>.tagOpt=--no-tags` in the config, ensuring
 	that future `git pull` and `git fetch` operations won't follow
@@ -279,9 +279,9 @@
 branch. This is useful e.g. to maintain minimal clones of the default
 branch of some repository for search indexing.
 
---recurse-submodules[=<pathspec>]::
+`--recurse-submodules`[`=`{empty}__<pathspec>__]::
 	After the clone is created, initialize and clone submodules
-	within based on the provided pathspec.  If no pathspec is
+	within based on the provided _<pathspec>_.  If no _=<pathspec>_ is
 	provided, all submodules are initialized and cloned.
 	This option can be given multiple times for pathspecs consisting
 	of multiple entries.  The resulting clone has `submodule.active` set to
@@ -295,42 +295,48 @@
 not have a worktree/checkout (i.e. if any of `--no-checkout`/`-n`, `--bare`,
 or `--mirror` is given)
 
---[no-]shallow-submodules::
+`--`[`no-`]`shallow-submodules`::
 	All submodules which are cloned will be shallow with a depth of 1.
 
---[no-]remote-submodules::
+`--`[`no-`]`remote-submodules`::
 	All submodules which are cloned will use the status of the submodule's
 	remote-tracking branch to update the submodule, rather than the
 	superproject's recorded SHA-1. Equivalent to passing `--remote` to
 	`git submodule update`.
 
---separate-git-dir=<git-dir>::
+`--separate-git-dir=`{empty}__<git-dir>__::
 	Instead of placing the cloned repository where it is supposed
 	to be, place the cloned repository at the specified directory,
 	then make a filesystem-agnostic Git symbolic link to there.
 	The result is Git repository can be separated from working
 	tree.
 
--j <n>::
---jobs <n>::
+`--ref-format=`{empty}__<ref-format>__::
+
+Specify the given ref storage format for the repository. The valid values are:
++
+include::ref-storage-format.txt[]
+
+`-j` _<n>_::
+`--jobs` _<n>_::
 	The number of submodules fetched at the same time.
 	Defaults to the `submodule.fetchJobs` option.
 
-<repository>::
-	The (possibly remote) repository to clone from.  See the
+_<repository>_::
+	The (possibly remote) _<repository>_ to clone from.  See the
 	<<URLS,GIT URLS>> section below for more information on specifying
 	repositories.
 
-<directory>::
+_<directory>_::
 	The name of a new directory to clone into.  The "humanish"
-	part of the source repository is used if no directory is
+	part of the source repository is used if no _<directory>_ is
 	explicitly given (`repo` for `/path/to/repo.git` and `foo`
 	for `host.xz:foo/.git`).  Cloning into an existing directory
 	is only allowed if the directory is empty.
 
---bundle-uri=<uri>::
+`--bundle-uri=`{empty}__<uri>__::
 	Before fetching from the remote, fetch a bundle from the given
-	`<uri>` and unbundle the data into the local repository. The refs
+	_<uri>_ and unbundle the data into the local repository. The refs
 	in the bundle will be stored under the hidden `refs/bundle/*`
 	namespace. This option is incompatible with `--depth`,
 	`--shallow-since`, and `--shallow-exclude`.
diff --git a/Documentation/git-commit-graph.txt b/Documentation/git-commit-graph.txt
index c8dbceb..903b168 100644
--- a/Documentation/git-commit-graph.txt
+++ b/Documentation/git-commit-graph.txt
@@ -13,7 +13,7 @@
 'git commit-graph write' [--object-dir <dir>] [--append]
 			[--split[=<strategy>]] [--reachable | --stdin-packs | --stdin-commits]
 			[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress]
-			<split options>
+			<split-options>
 
 
 DESCRIPTION
diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index a6cef5d..89ecfc6 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -347,6 +347,8 @@
 	- 'normal' - Shows untracked files and directories
 	- 'all'    - Also shows individual files in untracked directories.
 
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 The default can be changed using the status.showUntrackedFiles
 configuration variable documented in linkgit:git-config[1].
 --
diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
index b1caac8..65c645d 100644
--- a/Documentation/git-config.txt
+++ b/Documentation/git-config.txt
@@ -9,21 +9,14 @@
 SYNOPSIS
 --------
 [verse]
-'git config' [<file-option>] [--type=<type>] [--fixed-value] [--show-origin] [--show-scope] [-z|--null] <name> [<value> [<value-pattern>]]
-'git config' [<file-option>] [--type=<type>] --add <name> <value>
-'git config' [<file-option>] [--type=<type>] [--fixed-value] --replace-all <name> <value> [<value-pattern>]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] [--fixed-value] --get <name> [<value-pattern>]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] [--fixed-value] --get-all <name> [<value-pattern>]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] [--fixed-value] [--name-only] --get-regexp <name-regex> [<value-pattern>]
-'git config' [<file-option>] [--type=<type>] [-z|--null] --get-urlmatch <name> <URL>
-'git config' [<file-option>] [--fixed-value] --unset <name> [<value-pattern>]
-'git config' [<file-option>] [--fixed-value] --unset-all <name> [<value-pattern>]
-'git config' [<file-option>] --rename-section <old-name> <new-name>
-'git config' [<file-option>] --remove-section <name>
-'git config' [<file-option>] [--show-origin] [--show-scope] [-z|--null] [--name-only] -l | --list
-'git config' [<file-option>] --get-color <name> [<default>]
+'git config list' [<file-option>] [<display-option>] [--includes]
+'git config get' [<file-option>] [<display-option>] [--includes] [--all] [--regexp=<regexp>] [--value=<value>] [--fixed-value] [--default=<default>] <name>
+'git config set' [<file-option>] [--type=<type>] [--all] [--value=<value>] [--fixed-value] <name> <value>
+'git config unset' [<file-option>] [--all] [--value=<value>] [--fixed-value] <name> <value>
+'git config rename-section' [<file-option>] <old-name> <new-name>
+'git config remove-section' [<file-option>] <name>
+'git config edit' [<file-option>]
 'git config' [<file-option>] --get-colorbool <name> [<stdout-is-tty>]
-'git config' [<file-option>] -e | --edit
 
 DESCRIPTION
 -----------
@@ -31,7 +24,7 @@
 actually the section and the key separated by a dot, and the value will be
 escaped.
 
-Multiple lines can be added to an option by using the `--add` option.
+Multiple lines can be added to an option by using the `--append` option.
 If you want to update or unset an option which can occur on multiple
 lines, a `value-pattern` (which is an extended regular expression,
 unless the `--fixed-value` option is given) needs to be given.  Only the
@@ -74,6 +67,42 @@
 A list of all available configuration variables can be obtained using the
 `git help --config` command.
 
+COMMANDS
+--------
+
+list::
+	List all variables set in config file, along with their values.
+
+get::
+	Emits the value of the specified key. If key is present multiple times
+	in the configuration, emits the last value. If `--all` is specified,
+	emits all values associated with key. Returns error code 1 if key is
+	not present.
+
+set::
+	Set value for one or more config options. By default, this command
+	refuses to write multi-valued config options. Passing `--all` will
+	replace all multi-valued config options with the new value, whereas
+	`--value=` will replace all config options whose values match the given
+	pattern.
+
+unset::
+	Unset value for one or more config options. By default, this command
+	refuses to unset multi-valued keys. Passing `--all` will unset all
+	multi-valued config options, whereas `--value` will unset all config
+	options whose values match the given pattern.
+
+rename-section::
+	Rename the given section to a new name.
+
+remove-section::
+	Remove the given section from the configuration file.
+
+edit::
+	Opens an editor to modify the specified config file; either
+	`--system`, `--global`, `--local` (default), `--worktree`, or
+	`--file <config-file>`.
+
 [[OPTIONS]]
 OPTIONS
 -------
@@ -82,32 +111,37 @@
 	Default behavior is to replace at most one line. This replaces
 	all lines matching the key (and optionally the `value-pattern`).
 
---add::
+--append::
 	Adds a new line to the option without altering any existing
-	values.  This is the same as providing '^$' as the `value-pattern`
-	in `--replace-all`.
+	values. This is the same as providing '--value=^$' in `set`.
 
---get::
-	Get the value for a given key (optionally filtered by a regex
-	matching the value). Returns error code 1 if the key was not
-	found and the last value if multiple key values were found.
+--comment <message>::
+	Append a comment at the end of new or modified lines.
 
---get-all::
-	Like get, but returns all values for a multi-valued key.
+	If _<message>_ begins with one or more whitespaces followed
+	by "#", it is used as-is.  If it begins with "#", a space is
+	prepended before it is used.  Otherwise, a string " # " (a
+	space followed by a hash followed by a space) is prepended
+	to it.  And the resulting string is placed immediately after
+	the value defined for the variable.  The _<message>_ must
+	not contain linefeed characters (no multi-line comments are
+	permitted).
 
---get-regexp::
-	Like --get-all, but interprets the name as a regular expression and
-	writes out the key names.  Regular expression matching is currently
-	case-sensitive and done against a canonicalized version of the key
-	in which section and variable names are lowercased, but subsection
-	names are not.
+--all::
+	With `get`, return all values for a multi-valued key.
 
---get-urlmatch <name> <URL>::
-	When given a two-part name section.key, the value for
-	section.<URL>.key whose <URL> part matches the best to the
+---regexp::
+	With `get`, interpret the name as a regular expression. Regular
+	expression matching is currently case-sensitive and done against a
+	canonicalized version of the key in which section and variable names
+	are lowercased, but subsection names are not.
+
+--url=<URL>::
+	When given a two-part <name> as <section>.<key>, the value for
+	<section>.<URL>.<key> whose <URL> part matches the best to the
 	given URL is returned (if no such key exists, the value for
-	section.key is used as a fallback).  When given just the
-	section as name, do so for all the keys in the section and
+	<section>.<key> is used as a fallback).  When given just the
+	<section> as name, do so for all the keys in the section and
 	list them.  Returns error code 1 if no value is found.
 
 --global::
@@ -166,22 +200,6 @@
 	section in linkgit:gitrevisions[7] for a more complete list of
 	ways to spell blob names.
 
---remove-section::
-	Remove the given section from the configuration file.
-
---rename-section::
-	Rename the given section to a new name.
-
---unset::
-	Remove the line matching the key from config file.
-
---unset-all::
-	Remove all lines matching the key from config file.
-
--l::
---list::
-	List all variables set in config file, along with their values.
-
 --fixed-value::
 	When used with the `value-pattern` argument, treat `value-pattern` as
 	an exact string instead of a regular expression. This will restrict
@@ -236,8 +254,8 @@
 	contain line breaks.
 
 --name-only::
-	Output only the names of config variables for `--list` or
-	`--get-regexp`.
+	Output only the names of config variables for `list` or
+	`get`.
 
 --show-origin::
 	Augment the output of all queried config options with the
@@ -261,22 +279,6 @@
 	When the color setting for `name` is undefined, the command uses
 	`color.ui` as fallback.
 
---get-color <name> [<default>]::
-
-	Find the color configured for `name` (e.g. `color.diff.new`) and
-	output it as the ANSI color escape sequence to the standard
-	output.  The optional `default` parameter is used instead, if
-	there is no color configured for `name`.
-+
-`--type=color [--default=<default>]` is preferred over `--get-color`
-(but note that `--get-color` will omit the trailing newline printed by
-`--type=color`).
-
--e::
---edit::
-	Opens an editor to modify the specified config file; either
-	`--system`, `--global`, or repository (default).
-
 --[no-]includes::
 	Respect `include.*` directives in config files when looking up
 	values. Defaults to `off` when a specific file is given (e.g.,
@@ -284,14 +286,64 @@
 	config files.
 
 --default <value>::
-  When using `--get`, and the requested variable is not found, behave as if
-  <value> were the value assigned to the that variable.
+  When using `get`, and the requested variable is not found, behave as if
+  <value> were the value assigned to that variable.
+
+DEPRECATED MODES
+----------------
+
+The following modes have been deprecated in favor of subcommands. It is
+recommended to migrate to the new syntax.
+
+'git config <name>'::
+	Replaced by `git config get <name>`.
+
+'git config <name> <value> [<value-pattern>]'::
+	Replaced by `git config set [--value=<pattern>] <name> <value>`.
+
+-l::
+--list::
+	Replaced by `git config list`.
+
+--get <name> [<value-pattern>]::
+	Replaced by `git config get [--value=<pattern>] <name>`.
+
+--get-all <name> [<value-pattern>]::
+	Replaced by `git config get [--value=<pattern>] --all --show-names <name>`.
+
+--get-regexp <name-regexp>::
+	Replaced by `git config get --all --show-names --regexp <name-regexp>`.
+
+--get-urlmatch <name> <URL>::
+	Replaced by `git config get --all --show-names --url=<URL> <name>`.
+
+--get-color <name> [<default>]::
+	Replaced by `git config get --type=color [--default=<default>] <name>`.
+
+--add <name> <value>::
+	Replaced by `git config set --append <name> <value>`.
+
+--unset <name> [<value-pattern>]::
+	Replaced by `git config unset [--value=<pattern>] <name>`.
+
+--unset-all <name> [<value-pattern>]::
+	Replaced by `git config unset [--value=<pattern>] --all <name>`.
+
+--rename-section <old-name> <new-name>::
+	Replaced by `git config rename-section <old-name> <new-name>`.
+
+--remove-section <name>::
+	Replaced by `git config remove-section <name>`.
+
+-e::
+--edit::
+	Replaced by `git config edit`.
 
 CONFIGURATION
 -------------
 `pager.config` is only respected when listing configuration, i.e., when
-using `--list` or any of the `--get-*` which may return multiple results.
-The default is to use a pager.
+using `list` or `get` which may return multiple results. The default is to use
+a pager.
 
 [[FILES]]
 FILES
@@ -333,8 +385,8 @@
 values of a key from all files will be used.
 
 By default, options are only written to the repository specific
-configuration file. Note that this also affects options like `--replace-all`
-and `--unset`. *'git config' will only ever change one file at a time*.
+configuration file. Note that this also affects options like `set`
+and `unset`. *'git config' will only ever change one file at a time*.
 
 You can limit which configuration sources are read from or written to by
 specifying the path of a file with the `--file` option, or by specifying a
@@ -469,7 +521,7 @@
 you can set the filemode to true with
 
 ------------
-% git config core.filemode true
+% git config set core.filemode true
 ------------
 
 The hypothetical proxy command entries actually have a postfix to discern
@@ -477,7 +529,7 @@
 to "ssh".
 
 ------------
-% git config core.gitproxy '"ssh" for kernel.org' 'for kernel.org$'
+% git config set --value='for kernel.org$' core.gitproxy '"ssh" for kernel.org'
 ------------
 
 This makes sure that only the key/value pair for kernel.org is replaced.
@@ -485,7 +537,7 @@
 To delete the entry for renames, do
 
 ------------
-% git config --unset diff.renames
+% git config unset diff.renames
 ------------
 
 If you want to delete an entry for a multivar (like core.gitproxy above),
@@ -494,51 +546,45 @@
 To query the value for a given key, do
 
 ------------
-% git config --get core.filemode
-------------
-
-or
-
-------------
-% git config core.filemode
+% git config get core.filemode
 ------------
 
 or, to query a multivar:
 
 ------------
-% git config --get core.gitproxy "for kernel.org$"
+% git config get --value="for kernel.org$" core.gitproxy
 ------------
 
 If you want to know all the values for a multivar, do:
 
 ------------
-% git config --get-all core.gitproxy
+% git config get --all --show-names core.gitproxy
 ------------
 
 If you like to live dangerously, you can replace *all* core.gitproxy by a
 new one with
 
 ------------
-% git config --replace-all core.gitproxy ssh
+% git config set --all core.gitproxy ssh
 ------------
 
 However, if you really only want to replace the line for the default proxy,
 i.e. the one without a "for ..." postfix, do something like this:
 
 ------------
-% git config core.gitproxy ssh '! for '
+% git config set --value='! for ' core.gitproxy ssh
 ------------
 
 To actually match only values with an exclamation mark, you have to
 
 ------------
-% git config section.key value '[!]'
+% git config set --value='[!]' section.key value
 ------------
 
 To add a new proxy, without altering any of the existing ones, use
 
 ------------
-% git config --add core.gitproxy '"proxy-command" for example.com'
+% git config set --append core.gitproxy '"proxy-command" for example.com'
 ------------
 
 An example to use customized color from the configuration in your
@@ -546,8 +592,8 @@
 
 ------------
 #!/bin/sh
-WS=$(git config --get-color color.diff.whitespace "blue reverse")
-RESET=$(git config --get-color "" "reset")
+WS=$(git config get --type=color --default="blue reverse" color.diff.whitespace)
+RESET=$(git config get --type=color --default="reset" "")
 echo "${WS}your whitespace color or blue reverse${RESET}"
 ------------
 
@@ -555,11 +601,11 @@
 false, while it is set to `true` for all others:
 
 ------------
-% git config --type=bool --get-urlmatch http.sslverify https://good.example.com
+% git config get --type=bool --url=https://good.example.com http.sslverify
 true
-% git config --type=bool --get-urlmatch http.sslverify https://weak.example.com
+% git config get --type=bool --url=https://weak.example.com http.sslverify
 false
-% git config --get-urlmatch http https://weak.example.com
+% git config get --url=https://weak.example.com http
 http.cookieFile /tmp/cookie.txt
 http.sslverify false
 ------------
diff --git a/Documentation/git-credential.txt b/Documentation/git-credential.txt
index 918a0aa..e414932 100644
--- a/Documentation/git-credential.txt
+++ b/Documentation/git-credential.txt
@@ -8,7 +8,7 @@
 SYNOPSIS
 --------
 ------------------
-'git credential' (fill|approve|reject)
+'git credential' (fill|approve|reject|capability)
 ------------------
 
 DESCRIPTION
@@ -41,6 +41,9 @@
 any configured credential helpers, which may erase any stored
 credentials matching the description.
 
+If the action is `capability`, git-credential will announce any capabilities
+it supports to standard output.
+
 If the action is `approve` or `reject`, no output should be emitted.
 
 TYPICAL USE OF GIT CREDENTIAL
@@ -111,7 +114,9 @@
 separated by an `=` (equals) sign, followed by a newline.
 
 The key may contain any bytes except `=`, newline, or NUL. The value may
-contain any bytes except newline or NUL.
+contain any bytes except newline or NUL.  A line, including the trailing
+newline, may not exceed 65535 bytes in order to allow implementations to
+parse efficiently.
 
 Attributes with keys that end with C-style array brackets `[]` can have
 multiple values. Each instance of a multi-valued attribute forms an
@@ -178,6 +183,61 @@
 Components which are missing from the URL (e.g., there is no
 username in the example above) will be left unset.
 
+`authtype`::
+	This indicates that the authentication scheme in question should be used.
+	Common values for HTTP and HTTPS include `basic`, `bearer`, and `digest`,
+	although the latter is insecure and should not be used.  If `credential`
+	is used, this may be set to an arbitrary string suitable for the protocol in
+	question (usually HTTP).
++
+This value should not be sent unless the appropriate capability (see below) is
+provided on input.
+
+`credential`::
+	The pre-encoded credential, suitable for the protocol in question (usually
+	HTTP).  If this key is sent, `authtype` is mandatory, and `username` and
+	`password` are not used.  For HTTP, Git concatenates the `authtype` value and
+	this value with a single space to determine the `Authorization` header.
++
+This value should not be sent unless the appropriate capability (see below) is
+provided on input.
+
+`ephemeral`::
+	This boolean value indicates, if true, that the value in the `credential`
+	field should not be saved by the credential helper because its usefulness is
+	limited in time.  For example, an HTTP Digest `credential` value is computed
+	using a nonce and reusing it will not result in successful authentication.
+	This may also be used for situations with short duration (e.g., 24-hour)
+	credentials.  The default value is false.
++
+The credential helper will still be invoked with `store` or `erase` so that it
+can determine whether the operation was successful.
++
+This value should not be sent unless the appropriate capability (see below) is
+provided on input.
+
+`state[]`::
+	This value provides an opaque state that will be passed back to this helper
+	if it is called again.  Each different credential helper may specify this
+	once.  The value should include a prefix unique to the credential helper and
+	should ignore values that don't match its prefix.
++
+This value should not be sent unless the appropriate capability (see below) is
+provided on input.
+
+`continue`::
+	This is a boolean value, which, if enabled, indicates that this
+	authentication is a non-final part of a multistage authentication step. This
+	is common in protocols such as NTLM and Kerberos, where two rounds of client
+	authentication are required, and setting this flag allows the credential
+	helper to implement the multistage authentication step.  This flag should
+	only be sent if a further stage is required; that is, if another round of
+	authentication is expected.
++
+This value should not be sent unless the appropriate capability (see below) is
+provided on input.  This attribute is 'one-way' from a credential helper to
+pass information to Git (or other programs invoking `git credential`).
+
 `wwwauth[]`::
 
 	When an HTTP response is received by Git that includes one or more
@@ -189,7 +249,45 @@
 they appear in the HTTP response. This attribute is 'one-way' from Git
 to pass additional information to credential helpers.
 
-Unrecognised attributes are silently discarded.
+`capability[]`::
+	This signals that Git, or the helper, as appropriate, supports the capability
+	in question.  This can be used to provide better, more specific data as part
+	of the protocol.  A `capability[]` directive must precede any value depending
+	on it and these directives _should_ be the first item announced in the
+	protocol.
++
+There are two currently supported capabilities.  The first is `authtype`, which
+indicates that the `authtype`, `credential`, and `ephemeral` values are
+understood.  The second is `state`, which indicates that the `state[]` and
+`continue` values are understood.
++
+It is not obligatory to use the additional features just because the capability
+is supported, but they should not be provided without the capability.
+
+Unrecognised attributes and capabilities are silently discarded.
+
+[[CAPA-IOFMT]]
+CAPABILITY INPUT/OUTPUT FORMAT
+------------------------------
+
+For `git credential capability`, the format is slightly different. First, a
+`version 0` announcement is made to indicate the current version of the
+protocol, and then each capability is announced with a line like `capability
+authtype`. Credential helpers may also implement this format, again with the
+`capability` argument. Additional lines may be added in the future; callers
+should ignore lines which they don't understand.
+
+Because this is a new part of the credential helper protocol, older versions of
+Git, as well as some credential helpers, may not support it.  If a non-zero
+exit status is received, or if the first line doesn't start with the word
+`version` and a space, callers should assume that no capabilities are supported.
+
+The intention of this format is to differentiate it from the credential output
+in an unambiguous way.  It is possible to use very simple credential helpers
+(e.g., inline shell scripts) which always produce identical output.  Using a
+distinct format allows users to continue to use this syntax without having to
+worry about correctly implementing capability advertisements or accidentally
+confusing callers querying for capabilities.
 
 GIT
 ---
diff --git a/Documentation/git-cvsserver.txt b/Documentation/git-cvsserver.txt
index cf4a5a2..4c475ef 100644
--- a/Documentation/git-cvsserver.txt
+++ b/Documentation/git-cvsserver.txt
@@ -197,7 +197,7 @@
 5. Clients should now be able to check out the project. Use the CVS 'module'
    name to indicate what Git 'head' you want to check out.  This also sets the
    name of your newly checked-out directory, unless you tell it otherwise with
-   `-d <dir_name>`.  For example, this checks out 'master' branch to the
+   `-d <dir-name>`.  For example, this checks out 'master' branch to the
    `project-master` directory:
 +
 ------
@@ -224,7 +224,7 @@
 that the database is up to date any time 'git-cvsserver' is executed).
 
 By default it uses SQLite databases in the Git directory, named
-`gitcvs.<module_name>.sqlite`. Note that the SQLite backend creates
+`gitcvs.<module-name>.sqlite`. Note that the SQLite backend creates
 temporary files in the same directory as the database file on
 write so it might not be enough to grant the users using
 'git-cvsserver' write access to the database file without granting
diff --git a/Documentation/git-daemon.txt b/Documentation/git-daemon.txt
index e064f91..ede7b93 100644
--- a/Documentation/git-daemon.txt
+++ b/Documentation/git-daemon.txt
@@ -18,7 +18,7 @@
 	     [--allow-override=<service>] [--forbid-override=<service>]
 	     [--access-hook=<path>] [--[no-]informative-errors]
 	     [--inetd |
-	      [--listen=<host_or_ipaddr>] [--port=<n>]
+	      [--listen=<host-or-ipaddr>] [--port=<n>]
 	      [--user=<user> [--group=<group>]]]
 	     [--log-destination=(stderr|syslog|none)]
 	     [<directory>...]
@@ -86,10 +86,10 @@
 	Incompatible with --detach, --port, --listen, --user and --group
 	options.
 
---listen=<host_or_ipaddr>::
+--listen=<host-or-ipaddr>::
 	Listen on a specific IP address or hostname.  IP addresses can
 	be either an IPv4 address or an IPv6 address if supported.  If IPv6
-	is not supported, then --listen=hostname is also not supported and
+	is not supported, then --listen=<hostname> is also not supported and
 	--listen must be given an IPv4 address.
 	Can be given more than once.
 	Incompatible with `--inetd` option.
@@ -141,8 +141,8 @@
 	specified with no parameter, a request to
 	git://host/{tilde}alice/foo is taken as a request to access
 	'foo' repository in the home directory of user `alice`.
-	If `--user-path=path` is specified, the same request is
-	taken as a request to access `path/foo` repository in
+	If `--user-path=<path>` is specified, the same request is
+	taken as a request to access `<path>/foo` repository in
 	the home directory of user `alice`.
 
 --verbose::
diff --git a/Documentation/git-diagnose.txt b/Documentation/git-diagnose.txt
index 3ec8cc7..0711959 100644
--- a/Documentation/git-diagnose.txt
+++ b/Documentation/git-diagnose.txt
@@ -45,7 +45,7 @@
 -s <format>::
 --suffix <format>::
 	Specify an alternate suffix for the diagnostics archive name, to create
-	a file named 'git-diagnostics-<formatted suffix>'. This should take the
+	a file named 'git-diagnostics-<formatted-suffix>'. This should take the
 	form of a strftime(3) format string; the current local time will be
 	used.
 
diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index 50cb080..a616f8b 100644
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -90,7 +90,7 @@
 --extcmd=<command>::
 	Specify a custom command for viewing diffs.
 	'git-difftool' ignores the configured defaults and runs
-	`$command $LOCAL $REMOTE` when this option is specified.
+	`<command> $LOCAL $REMOTE` when this option is specified.
 	Additionally, `$BASE` is set in the environment.
 
 -g::
@@ -105,7 +105,6 @@
 	`merge.tool` until a tool is found.
 
 --[no-]trust-exit-code::
-	'git-difftool' invokes a diff tool individually on each file.
 	Errors reported by the diff tool are ignored by default.
 	Use `--trust-exit-code` to make 'git-difftool' exit when an
 	invoked diff tool returns a non-zero exit code.
diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt
index 4643ddb..752e4b9 100644
--- a/Documentation/git-fast-export.txt
+++ b/Documentation/git-fast-export.txt
@@ -48,7 +48,7 @@
 when encountering such a tag.  With 'drop' it will omit such tags from
 the output.  With 'rewrite', if the tagged object is a commit, it will
 rewrite the tag to tag an ancestor commit (via parent rewriting; see
-linkgit:git-rev-list[1])
+linkgit:git-rev-list[1]).
 
 -M::
 -C::
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt
index bd7b1e0..3d43515 100644
--- a/Documentation/git-fast-import.txt
+++ b/Documentation/git-fast-import.txt
@@ -303,7 +303,7 @@
 	with e.g. bogus timezone values.
 
 `rfc2822`::
-	This is the standard email format as described by RFC 2822.
+	This is the standard date format as described by RFC 2822.
 +
 An example value is ``Tue Feb 6 11:22:18 2007 -0500''.  The Git
 parser is accurate, but a little on the lenient side.  It is the
@@ -630,18 +630,28 @@
 In both formats `<path>` is the complete path of the file to be added
 (if not already existing) or modified (if already existing).
 
-A `<path>` string must use UNIX-style directory separators (forward
-slash `/`), may contain any byte other than `LF`, and must not
-start with double quote (`"`).
+A `<path>` can be written as unquoted bytes or a C-style quoted string.
 
-A path can use C-style string quoting; this is accepted in all cases
-and mandatory if the filename starts with double quote or contains
-`LF`. In C-style quoting, the complete name should be surrounded with
-double quotes, and any `LF`, backslash, or double quote characters
-must be escaped by preceding them with a backslash (e.g.,
-`"path/with\n, \\ and \" in it"`).
+When a `<path>` does not start with a double quote (`"`), it is an
+unquoted string and is parsed as literal bytes without any escape
+sequences. However, if the filename contains `LF` or starts with double
+quote, it cannot be represented as an unquoted string and must be
+quoted. Additionally, the source `<path>` in `filecopy` or `filerename`
+must be quoted if it contains SP.
 
-The value of `<path>` must be in canonical form. That is it must not:
+When a `<path>` starts with a double quote (`"`), it is a C-style quoted
+string, where the complete filename is enclosed in a pair of double
+quotes and escape sequences are used. Certain characters must be escaped
+by preceding them with a backslash: `LF` is written as `\n`, backslash
+as `\\`, and double quote as `\"`. Some characters may optionally be
+written with escape sequences: `\a` for bell, `\b` for backspace, `\f`
+for form feed, `\n` for line feed, `\r` for carriage return, `\t` for
+horizontal tab, and `\v` for vertical tab. Any byte can be written with
+3-digit octal codes (e.g., `\033`). All filenames can be represented as
+quoted strings.
+
+A `<path>` must use UNIX-style directory separators (forward slash `/`)
+and its value must be in canonical form. That is it must not:
 
 * contain an empty directory component (e.g. `foo//bar` is invalid),
 * end with a directory separator (e.g. `foo/` is invalid),
@@ -651,6 +661,7 @@
 
 The root of the tree can be represented by an empty string as `<path>`.
 
+`<path>` cannot contain NUL, either literally or escaped as `\000`.
 It is recommended that `<path>` always be encoded using UTF-8.
 
 `filedelete`
@@ -745,11 +756,11 @@
 
 `notemodify`
 ^^^^^^^^^^^^
-Included in a `commit` `<notes_ref>` command to add a new note
+Included in a `commit` `<notes-ref>` command to add a new note
 annotating a `<commit-ish>` or change this annotation contents.
 Internally it is similar to filemodify 100644 on `<commit-ish>`
 path (maybe split into subdirectories). It's not advised to
-use any other commands to write to the `<notes_ref>` tree except
+use any other commands to write to the `<notes-ref>` tree except
 `filedeleteall` to delete all existing notes in this tree.
 This command has two different means of specifying the content
 of the note.
diff --git a/Documentation/git-fetch.txt b/Documentation/git-fetch.txt
index f123139..50900a5 100644
--- a/Documentation/git-fetch.txt
+++ b/Documentation/git-fetch.txt
@@ -186,8 +186,8 @@
 ------------------------------------------------
 $ git fetch origin --prune --prune-tags
 $ git fetch origin --prune 'refs/tags/*:refs/tags/*'
-$ git fetch <url of origin> --prune --prune-tags
-$ git fetch <url of origin> --prune 'refs/tags/*:refs/tags/*'
+$ git fetch <url-of-origin> --prune --prune-tags
+$ git fetch <url-of-origin> --prune 'refs/tags/*:refs/tags/*'
 ------------------------------------------------
 
 OUTPUT
diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index 62e482a..5a4f853 100644
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -14,7 +14,7 @@
 	[--msg-filter <command>] [--commit-filter <command>]
 	[--tag-name-filter <command>] [--prune-empty]
 	[--original <namespace>] [-d <directory>] [-f | --force]
-	[--state-branch <branch>] [--] [<rev-list options>...]
+	[--state-branch <branch>] [--] [<rev-list-options>...]
 
 WARNING
 -------
@@ -32,7 +32,7 @@
 DESCRIPTION
 -----------
 Lets you rewrite Git revision history by rewriting the branches mentioned
-in the <rev-list options>, applying custom filters on each revision.
+in the <rev-list-options>, applying custom filters on each revision.
 Those filters can modify each tree (e.g. removing a file or running
 a perl rewrite on all files) or information about each commit.
 Otherwise, all information (including original commit times or merge
@@ -624,7 +624,7 @@
      real backup; it dereferences tags first.)
 
   ** Running git-filter-branch with either --tags or --all in your
-     <rev-list options>.  In order to retain annotated tags as
+     <rev-list-options>.  In order to retain annotated tags as
      annotated, you must use --tag-name-filter (and must not have
      restored from refs/original/ in a previously botched rewrite).
 
diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index e86d570..c1dd12b 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -10,7 +10,7 @@
 [verse]
 'git for-each-ref' [--count=<count>] [--shell|--perl|--python|--tcl]
 		   [(--sort=<key>)...] [--format=<format>]
-		   [ --stdin | <pattern>... ]
+		   [--include-root-refs] [ --stdin | <pattern>... ]
 		   [--points-at=<object>]
 		   [--merged[=<object>]] [--no-merged[=<object>]]
 		   [--contains[=<object>]] [--no-contains[=<object>]]
@@ -51,17 +51,14 @@
 	key.
 
 --format=<format>::
-	A string that interpolates `%(fieldname)` from a ref being shown
-	and the object it points at.  If `fieldname`
-	is prefixed with an asterisk (`*`) and the ref points
-	at a tag object, use the value for the field in the object
-	which the tag object refers to (instead of the field in the tag object).
-	When unspecified, `<format>` defaults to
-	`%(objectname) SPC %(objecttype) TAB %(refname)`.
-	It also interpolates `%%` to `%`, and `%xx` where `xx`
-	are hex digits interpolates to character with hex code
-	`xx`; for example `%00` interpolates to `\0` (NUL),
-	`%09` to `\t` (TAB) and `%0a` to `\n` (LF).
+	A string that interpolates `%(fieldname)` from a ref being shown and
+	the object it points at. In addition, the string literal `%%`
+	renders as `%` and `%xx` - where `xx` are hex digits - renders as
+	the character with hex code `xx`. For example, `%00` interpolates to
+	`\0` (NUL), `%09` to `\t` (TAB), and `%0a` to `\n` (LF).
++
+When unspecified, `<format>` defaults to `%(objectname) SPC %(objecttype)
+TAB %(refname)`.
 
 --color[=<when>]::
 	Respect any colors specified in the `--format` option. The
@@ -108,6 +105,9 @@
 	any excluded pattern(s) are shown. Matching is done using the
 	same rules as `<pattern>` above.
 
+--include-root-refs::
+	List root refs (HEAD and pseudorefs) apart from regular refs.
+
 FIELD NAMES
 -----------
 
@@ -298,6 +298,10 @@
 from the `committer` or `tagger` fields depending on the object type.
 These are intended for working on a mix of annotated and lightweight tags.
 
+For tag objects, a `fieldname` prefixed with an asterisk (`*`) expands to
+the `fieldname` value of the peeled object, rather than that of the tag
+object itself.
+
 Fields that have name-email-date tuple as its value (`author`,
 `committer`, and `tagger`) can be suffixed with `name`, `email`,
 and `date` to extract the named component.  For email fields (`authoremail`,
@@ -358,9 +362,11 @@
 the object referred by the ref does not cause an error.  It
 returns an empty string instead.
 
-As a special case for the date-type fields, you may specify a format for
-the date by adding `:` followed by date format name (see the
-values the `--date` option to linkgit:git-rev-list[1] takes).
+As a special case for the date-type fields, you may specify a format for the
+date by adding `:` followed by date format name (see the values the `--date`
+option to linkgit:git-rev-list[1] takes). If this formatting is provided in
+a `--sort` key, references will be sorted according to the byte-value of the
+formatted string rather than the numeric value of the underlying timestamp.
 
 Some atoms like %(align) and %(if) always require a matching %(end).
 We call them "opening atoms" and sometimes denote them as %($open).
diff --git a/Documentation/git-for-each-repo.txt b/Documentation/git-for-each-repo.txt
index 94bd19d..abe3527 100644
--- a/Documentation/git-for-each-repo.txt
+++ b/Documentation/git-for-each-repo.txt
@@ -42,6 +42,15 @@
 as available. If `git for-each-repo` is run in a directory that is not a
 Git repository, then only the system and global config is used.
 
+--keep-going::
+	Continue with the remaining repositories if the command failed
+	on a repository. The exit code will still indicate that the
+	overall operation was not successful.
++
+Note that the exact exit code of the failing command is not passed
+through as the exit code of the `for-each-repo` command: If the command
+failed in any of the specified repositories, the overall exit code will
+be 1.
 
 SUBPROCESS BEHAVIOR
 -------------------
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index 414da6b..8708b31 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -17,10 +17,10 @@
 		   [--signature-file=<file>]
 		   [-n | --numbered | -N | --no-numbered]
 		   [--start-number <n>] [--numbered-files]
-		   [--in-reply-to=<message id>] [--suffix=.<sfx>]
+		   [--in-reply-to=<message-id>] [--suffix=.<sfx>]
 		   [--ignore-if-in-upstream] [--always]
 		   [--cover-from-description=<mode>]
-		   [--rfc] [--subject-prefix=<subject prefix>]
+		   [--rfc[=<rfc>]] [--subject-prefix=<subject-prefix>]
 		   [(--reroll-count|-v) <n>]
 		   [--to=<email>] [--cc=<email>]
 		   [--[no-]cover-letter] [--quiet]
@@ -30,8 +30,8 @@
 		   [--range-diff=<previous> [--creation-factor=<percent>]]
 		   [--filename-max-length=<n>]
 		   [--progress]
-		   [<common diff options>]
-		   [ <since> | <revision range> ]
+		   [<common-diff-options>]
+		   [ <since> | <revision-range> ]
 
 DESCRIPTION
 -----------
@@ -64,7 +64,7 @@
    to the tip of the current branch that are not in the history
    that leads to the <since> to be output.
 
-2. Generic <revision range> expression (see "SPECIFYING
+2. Generic <revision-range> expression (see "SPECIFYING
    REVISIONS" section in linkgit:gitrevisions[7]) means the
    commits in the specified range.
 
@@ -179,9 +179,9 @@
 itself.  If you want `git format-patch` to take care of threading, you
 will want to ensure that threading is disabled for `git send-email`.
 
---in-reply-to=<message id>::
+--in-reply-to=<message-id>::
 	Make the first mail (or all the mails with `--no-thread`) appear as a
-	reply to the given <message id>, which avoids breaking threads to
+	reply to the given <message-id>, which avoids breaking threads to
 	provide a new patch series.
 
 --ignore-if-in-upstream::
@@ -219,9 +219,9 @@
 	Use the contents of <file> instead of the branch's description
 	for generating the cover letter.
 
---subject-prefix=<subject prefix>::
+--subject-prefix=<subject-prefix>::
 	Instead of the standard '[PATCH]' prefix in the subject
-	line, instead use '[<subject prefix>]'. This can be used
+	line, instead use '[<subject-prefix>]'. This can be used
 	to name a patch series, and can be combined with the
 	`--numbered` option.
 +
@@ -238,10 +238,21 @@
 	value of the `format.filenameMaxLength` configuration
 	variable, or 64 if unconfigured.
 
---rfc::
-	Prepends "RFC" to the subject prefix (producing "RFC PATCH" by
-	default). RFC means "Request For Comments"; use this when sending
-	an experimental patch for discussion rather than application.
+--rfc[=<rfc>]::
+	Prepends the string _<rfc>_ (defaults to "RFC") to
+	the subject prefix.  As the subject prefix defaults to
+	"PATCH", you'll get "RFC PATCH" by default.
++
+RFC means "Request For Comments"; use this when sending
+an experimental patch for discussion rather than application.
+"--rfc=WIP" may also be a useful way to indicate that a patch
+is not complete yet ("WIP" stands for "Work In Progress").
++
+If the convention of the receiving community for a particular extra
+string is to have it _after_ the subject prefix, the string _<rfc>_
+can be prefixed with a dash ("`-`") to signal that the the rest of
+the _<rfc>_ string should be appended to the subject prefix instead,
+e.g., `--rfc='-(WIP)'` results in "PATCH (WIP)".
 
 -v <n>::
 --reroll-count=<n>::
@@ -346,6 +357,11 @@
 	between the previous and current series of patches by adjusting the
 	creation/deletion cost fudge factor. See linkgit:git-range-diff[1])
 	for details.
++
+Defaults to 999 (the linkgit:git-range-diff[1] uses 60), as the use
+case is to show comparison with an older iteration of the same
+topic and the tool should find more correspondence between the two
+sets of patches.
 
 --notes[=<ref>]::
 --no-notes::
@@ -403,7 +419,7 @@
 	`format.useAutoBase` configuration.
 
 --root::
-	Treat the revision argument as a <revision range>, even if it
+	Treat the revision argument as a <revision-range>, even if it
 	is just a single commit (that would normally be treated as a
 	<since>).  Note that root commits included in the specified
 	range are always formatted as creation patches, independently
diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index 0d0103c..1e6d7b6 100644
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -28,7 +28,7 @@
 	   [-f <file>] [-e] <pattern>
 	   [--and|--or|--not|(|)|-e <pattern>...]
 	   [--recurse-submodules] [--parent-basename <basename>]
-	   [ [--[no-]exclude-standard] [--cached | --no-index | --untracked] | <tree>...]
+	   [ [--[no-]exclude-standard] [--cached | --untracked | --no-index] | <tree>...]
 	   [--] [<pathspec>...]
 
 DESCRIPTION
@@ -45,13 +45,21 @@
 	Instead of searching tracked files in the working tree, search
 	blobs registered in the index file.
 
---no-index::
-	Search files in the current directory that is not managed by Git.
-
 --untracked::
 	In addition to searching in the tracked files in the working
 	tree, search also in untracked files.
 
+--no-index::
+	Search files in the current directory that is not managed by Git,
+	or by ignoring that the current directory is managed by Git.  This
+	is rather similar to running the regular `grep(1)` utility with its
+	`-r` option specified, but with some additional benefits, such as
+	using pathspec patterns to limit paths;  see the 'pathspec' entry
+	in linkgit:gitglossary[7] for more information.
++
+This option cannot be used together with `--cached` or `--untracked`.
+See also `grep.fallbackToNoIndex` in 'CONFIGURATION' below.
+
 --no-exclude-standard::
 	Also search in ignored files by not honoring the `.gitignore`
 	mechanism. Only useful with `--untracked`.
@@ -64,9 +72,9 @@
 --recurse-submodules::
 	Recursively search in each submodule that is active and
 	checked out in the repository.  When used in combination with the
-	<tree> option the prefix of all submodule output will be the name of
-	the parent project's <tree> object. This option has no effect
-	if `--no-index` is given.
+	_<tree>_ option the prefix of all submodule output will be the name of
+	the parent project's _<tree>_ object.  This option cannot be used together
+	with `--untracked`, and it has no effect if `--no-index` is specified.
 
 -a::
 --text::
@@ -178,7 +186,7 @@
 	Use \0 as the delimiter for pathnames in the output, and print
 	them verbatim. Without this option, pathnames with "unusual"
 	characters are quoted as explained for the configuration
-	variable core.quotePath (see linkgit:git-config[1]).
+	variable `core.quotePath` (see linkgit:git-config[1]).
 
 -o::
 --only-matching::
@@ -248,8 +256,8 @@
 	a non-zero status.
 
 --threads <num>::
-	Number of grep worker threads to use.
-	See `grep.threads` in 'CONFIGURATION' for more information.
+	Number of `grep` worker threads to use.  See 'NOTES ON THREADS'
+	and `grep.threads` in 'CONFIGURATION' for more information.
 
 -f <file>::
 	Read patterns from <file>, one per line.
@@ -332,13 +340,13 @@
 NOTES ON THREADS
 ----------------
 
-The `--threads` option (and the grep.threads configuration) will be ignored when
+The `--threads` option (and the `grep.threads` configuration) will be ignored when
 `--open-files-in-pager` is used, forcing a single-threaded execution.
 
 When grepping the object store (with `--cached` or giving tree objects), running
-with multiple threads might perform slower than single threaded if `--textconv`
-is given and there are too many text conversions. So if you experience low
-performance in this case, it might be desirable to use `--threads=1`.
+with multiple threads might perform slower than single-threaded if `--textconv`
+is given and there are too many text conversions.  Thus, if low performance is
+experienced in this case, it might be desirable to use `--threads=1`.
 
 CONFIGURATION
 -------------
diff --git a/Documentation/git-gui.txt b/Documentation/git-gui.txt
index e8f3ccb..f5b02ef 100644
--- a/Documentation/git-gui.txt
+++ b/Documentation/git-gui.txt
@@ -114,7 +114,7 @@
 
 The official repository of the 'git gui' project can be found at:
 
-  https://github.com/prati0100/git-gui.git/
+  https://github.com/j6t/git-gui
 
 GIT
 ---
diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt
index 6486620..5a20dee 100644
--- a/Documentation/git-index-pack.txt
+++ b/Documentation/git-index-pack.txt
@@ -79,8 +79,13 @@
 	to force the version for the generated pack index, and to force
 	64-bit index entries on objects located above the given offset.
 
---strict::
-	Die, if the pack contains broken objects or links.
+--strict[=<msg-id>=<severity>...]::
+	Die, if the pack contains broken objects or links. An optional
+	comma-separated list of `<msg-id>=<severity>` can be passed to change
+	the severity of some possible issues, e.g.,
+	 `--strict="missingEmail=ignore,badTagName=error"`. See the entry for the
+	`fsck.<msg-id>` configuration options in linkgit:git-fsck[1] for more
+	information on the possible values of `<msg-id>` and `<severity>`.
 
 --progress-title::
 	For internal use only.
@@ -91,13 +96,18 @@
 --check-self-contained-and-connected::
 	Die if the pack contains broken links. For internal use only.
 
---fsck-objects::
-	For internal use only.
+--fsck-objects[=<msg-id>=<severity>...]::
+	Die if the pack contains broken objects, but unlike `--strict`, don't
+	choke on broken links. If the pack contains a tree pointing to a
+	.gitmodules blob that does not exist, prints the hash of that blob
+	(for the caller to check) after the hash that goes into the name of the
+	pack/idx file (see "Notes").
 +
-Die if the pack contains broken objects. If the pack contains a tree
-pointing to a .gitmodules blob that does not exist, prints the hash of
-that blob (for the caller to check) after the hash that goes into the
-name of the pack/idx file (see "Notes").
+An optional comma-separated list of `<msg-id>=<severity>` can be passed to
+change the severity of some possible issues, e.g.,
+`--fsck-objects="missingEmail=ignore,badTagName=ignore"`. See the entry for the
+`fsck.<msg-id>` configuration options in linkgit:git-fsck[1] for more
+information on the possible values of `<msg-id>` and `<severity>`.
 
 --threads=<n>::
 	Specifies the number of threads to spawn when resolving
diff --git a/Documentation/git-init.txt b/Documentation/git-init.txt
index 6f0d297..daff93b 100644
--- a/Documentation/git-init.txt
+++ b/Documentation/git-init.txt
@@ -9,10 +9,11 @@
 SYNOPSIS
 --------
 [verse]
-'git init' [-q | --quiet] [--bare] [--template=<template-directory>]
-	  [--separate-git-dir <git-dir>] [--object-format=<format>]
-	  [-b <branch-name> | --initial-branch=<branch-name>]
-	  [--shared[=<permissions>]] [<directory>]
+`git init` [`-q` | `--quiet`] [`--bare`] [++--template=++__<template-directory>__]
+	  [`--separate-git-dir` _<git-dir>_] [++--object-format=++__<format>__]
+	  [++--ref-format=++__<format>__]
+	  [`-b` _<branch-name>_ | ++--initial-branch=++__<branch-name>__]
+	  [++--shared++[++=++__<permissions>__]] [_<directory>_]
 
 
 DESCRIPTION
@@ -32,37 +33,43 @@
 are created underneath; otherwise, the default `$GIT_DIR/objects`
 directory is used.
 
-Running 'git init' in an existing repository is safe. It will not
+Running `git init` in an existing repository is safe. It will not
 overwrite things that are already there. The primary reason for
-rerunning 'git init' is to pick up newly added templates (or to move
-the repository to another place if --separate-git-dir is given).
+rerunning `git init` is to pick up newly added templates (or to move
+the repository to another place if `--separate-git-dir` is given).
 
 OPTIONS
 -------
 
--q::
---quiet::
+`-q`::
+`--quiet`::
 
 Only print error and warning messages; all other output will be suppressed.
 
---bare::
+`--bare`::
 
 Create a bare repository. If `GIT_DIR` environment is not set, it is set to the
 current working directory.
 
---object-format=<format>::
+++--object-format=++__<format>__::
 
-Specify the given object format (hash algorithm) for the repository.  The valid
-values are 'sha1' and (if enabled) 'sha256'.  'sha1' is the default.
+Specify the given object _<format>_ (hash algorithm) for the repository.  The valid
+values are `sha1` and (if enabled) `sha256`.  `sha1` is the default.
 +
 include::object-format-disclaimer.txt[]
 
---template=<template-directory>::
+++--ref-format=++__<format>__::
+
+Specify the given ref storage _<format>_ for the repository. The valid values are:
++
+include::ref-storage-format.txt[]
+
+++--template=++__<template-directory>__::
 
 Specify the directory from which templates will be used.  (See the "TEMPLATE
 DIRECTORY" section below.)
 
---separate-git-dir=<git-dir>::
+++--separate-git-dir=++__<git-dir>__::
 
 Instead of initializing the repository as a directory to either `$GIT_DIR` or
 `./.git/`, create a text file there containing the path to the actual
@@ -71,52 +78,56 @@
 +
 If this is a reinitialization, the repository will be moved to the specified path.
 
--b <branch-name>::
---initial-branch=<branch-name>::
+`-b` _<branch-name>_::
+++--initial-branch=++__<branch-name>__::
 
-Use the specified name for the initial branch in the newly created
+Use _<branch-name>_ for the initial branch in the newly created
 repository.  If not specified, fall back to the default name (currently
 `master`, but this is subject to change in the future; the name can be
 customized via the `init.defaultBranch` configuration variable).
 
---shared[=(false|true|umask|group|all|world|everybody|<perm>)]::
+++--shared++[++=++(`false`|`true`|`umask`|`group`|`all`|`world`|`everybody`|_<perm>_)]::
 
 Specify that the Git repository is to be shared amongst several users.  This
 allows users belonging to the same group to push into that
-repository.  When specified, the config variable "core.sharedRepository" is
+repository.  When specified, the config variable `core.sharedRepository` is
 set so that files and directories under `$GIT_DIR` are created with the
 requested permissions.  When not specified, Git will use permissions reported
-by umask(2).
+by `umask`(2).
 +
-The option can have the following values, defaulting to 'group' if no value
+The option can have the following values, defaulting to `group` if no value
 is given:
 +
 --
-'umask' (or 'false')::
+`umask`::
+`false`::
 
-Use permissions reported by umask(2). The default, when `--shared` is not
+Use permissions reported by `umask`(2). The default, when `--shared` is not
 specified.
 
-'group' (or 'true')::
+`group`::
+`true`::
 
-Make the repository group-writable, (and g+sx, since the git group may not be
+Make the repository group-writable, (and `g+sx`, since the git group may not be
 the primary group of all users). This is used to loosen the permissions of an
-otherwise safe umask(2) value. Note that the umask still applies to the other
-permission bits (e.g. if umask is '0022', using 'group' will not remove read
-privileges from other (non-group) users). See '0xxx' for how to exactly specify
+otherwise safe `umask`(2) value. Note that the umask still applies to the other
+permission bits (e.g. if umask is `0022`, using `group` will not remove read
+privileges from other (non-group) users). See `0xxx` for how to exactly specify
 the repository permissions.
 
-'all' (or 'world' or 'everybody')::
+`all`::
+`world`::
+`everybody`::
 
-Same as 'group', but make the repository readable by all users.
+Same as `group`, but make the repository readable by all users.
 
-'<perm>'::
+_<perm>_::
 
-'<perm>' is a 3-digit octal number prefixed with `0` and each file
-will have mode '<perm>'. '<perm>' will override users' umask(2)
-value (and not only loosen permissions as 'group' and 'all'
-do). '0640' will create a repository which is group-readable, but
-not group-writable or accessible to others. '0660' will create a repo
+_<perm>_ is a 3-digit octal number prefixed with `0` and each file
+will have mode _<perm>_. _<perm>_ will override users' `umask`(2)
+value (and not only loosen permissions as `group` and `all`
+do). `0640` will create a repository which is group-readable, but
+not group-writable or accessible to others. `0660` will create a repo
 that is readable and writable to the current user and group, but
 inaccessible to others (directories and executable files get their
 `x` bit from the `r` bit for corresponding classes of users).
@@ -126,7 +137,7 @@
 in shared repositories, so that you cannot force a non fast-forwarding push
 into it.
 
-If you provide a 'directory', the command is run inside it. If this directory
+If you provide a _<directory>_, the command is run inside it. If this directory
 does not exist, it will be created.
 
 TEMPLATE DIRECTORY
@@ -165,7 +176,7 @@
 $ git commit    <3>
 ----------------
 +
-<1> Create a /path/to/my/codebase/.git directory.
+<1> Create a `/path/to/my/codebase/.git` directory.
 <2> Add all existing files to the index.
 <3> Record the pristine state as the first commit in the history.
 
@@ -174,6 +185,8 @@
 
 include::includes/cmd-config-section-all.txt[]
 
+:git-init:
+
 include::config/init.txt[]
 
 GIT
diff --git a/Documentation/git-interpret-trailers.txt b/Documentation/git-interpret-trailers.txt
index 418265f..d9dfb75 100644
--- a/Documentation/git-interpret-trailers.txt
+++ b/Documentation/git-interpret-trailers.txt
@@ -9,7 +9,7 @@
 --------
 [verse]
 'git interpret-trailers' [--in-place] [--trim-empty]
-			[(--trailer (<key>|<keyAlias>)[(=|:)<value>])...]
+			[(--trailer (<key>|<key-alias>)[(=|:)<value>])...]
 			[--parse] [<file>...]
 
 DESCRIPTION
@@ -67,9 +67,9 @@
 This means that the trimmed <key> and <value> will be separated by
 `': '` (one colon followed by one space).
 
-For convenience, a <keyAlias> can be configured to make using `--trailer`
+For convenience, a <key-alias> can be configured to make using `--trailer`
 shorter to type on the command line. This can be configured using the
-'trailer.<keyAlias>.key' configuration variable. The <keyAlias> must be a prefix
+'trailer.<key-alias>.key' configuration variable. The <keyAlias> must be a prefix
 of the full <key> string, although case sensitivity does not matter. For
 example, if you have
 
diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt
index f65a8cd..d08c7da 100644
--- a/Documentation/git-ls-files.txt
+++ b/Documentation/git-ls-files.txt
@@ -119,8 +119,10 @@
 
 --exclude-per-directory=<file>::
 	Read additional exclude patterns that apply only to the
-	directory and its subdirectories in <file>.  Deprecated; use
-	--exclude-standard instead.
+	directory and its subdirectories in <file>.  If you are
+	trying to emulate the way Porcelain commands work, using
+	the `--exclude-standard` option instead is easier and more
+	thorough.
 
 --exclude-standard::
 	Add the standard Git exclusions: .git/info/exclude, .gitignore
@@ -298,9 +300,8 @@
 flags --others or --ignored are specified.  linkgit:gitignore[5]
 specifies the format of exclude patterns.
 
-Generally, you should just use --exclude-standard, but for historical
-reasons the exclude patterns can be specified from the following
-places, in order:
+These exclude patterns can be specified from the following places,
+in order:
 
   1. The command-line flag --exclude=<pattern> specifies a
      single pattern.  Patterns are ordered in the same order
@@ -322,6 +323,18 @@
 by --exclude-per-directory is relative to the directory that the
 pattern file appears in.
 
+Generally, you should be able to use `--exclude-standard` when you
+want the exclude rules applied the same way as what Porcelain
+commands do.  To emulate what `--exclude-standard` specifies, you
+can give `--exclude-per-directory=.gitignore`, and then specify:
+
+  1. The file specified by the `core.excludesfile` configuration
+     variable, if exists, or the `$XDG_CONFIG_HOME/git/ignore` file.
+
+  2. The `$GIT_DIR/info/exclude` file.
+
+via the `--exclude-from=` option.
+
 SEE ALSO
 --------
 linkgit:git-read-tree[1], linkgit:gitignore[5]
diff --git a/Documentation/git-merge-file.txt b/Documentation/git-merge-file.txt
index 6a081ea..71915a0 100644
--- a/Documentation/git-merge-file.txt
+++ b/Documentation/git-merge-file.txt
@@ -92,6 +92,12 @@
 	Instead of leaving conflicts in the file, resolve conflicts
 	favouring our (or their or both) side of the lines.
 
+--diff-algorithm={patience|minimal|histogram|myers}::
+	Use a different diff algorithm while merging. The current default is "myers",
+	but selecting more recent algorithm such as "histogram" can help
+	avoid mismerges that occur due to unimportant matching lines
+	(such as braces from distinct functions). See also
+	linkgit:git-diff[1] `--diff-algorithm`.
 
 EXAMPLES
 --------
diff --git a/Documentation/git-merge-tree.txt b/Documentation/git-merge-tree.txt
index b50acac..84cb2ed 100644
--- a/Documentation/git-merge-tree.txt
+++ b/Documentation/git-merge-tree.txt
@@ -64,10 +64,18 @@
 	share no common history.  This flag can be given to override that
 	check and make the merge proceed anyway.
 
---merge-base=<commit>::
+--merge-base=<tree-ish>::
 	Instead of finding the merge-bases for <branch1> and <branch2>,
 	specify a merge-base for the merge, and specifying multiple bases is
 	currently not supported. This option is incompatible with `--stdin`.
++
+As the merge-base is provided directly, <branch1> and <branch2> do not need
+to specify commits; trees are enough.
+
+-X<option>::
+--strategy-option=<option>::
+	Pass the merge strategy-specific option through to the merge strategy.
+	See linkgit:git-merge[1] for details.
 
 [[OUTPUT]]
 OUTPUT
diff --git a/Documentation/git-mv.txt b/Documentation/git-mv.txt
index 7f991a3..dc1bf61 100644
--- a/Documentation/git-mv.txt
+++ b/Documentation/git-mv.txt
@@ -16,7 +16,7 @@
 Move or rename a file, directory, or symlink.
 
  git mv [-v] [-f] [-n] [-k] <source> <destination>
- git mv [-v] [-f] [-n] [-k] <source> ... <destination directory>
+ git mv [-v] [-f] [-n] [-k] <source> ... <destination-directory>
 
 In the first form, it renames <source>, which must exist and be either
 a file, symlink or directory, to <destination>.
diff --git a/Documentation/git-notes.txt b/Documentation/git-notes.txt
index f8310e5..c9221a6 100644
--- a/Documentation/git-notes.txt
+++ b/Documentation/git-notes.txt
@@ -56,7 +56,7 @@
 list::
 	List the notes object for a given object. If no object is
 	given, show a list of all note objects and the objects they
-	annotate (in the format "<note object> <annotated object>").
+	annotate (in the format "<note-object> <annotated-object>").
 	This is the default subcommand if no subcommand is given.
 
 add::
diff --git a/Documentation/git-pack-refs.txt b/Documentation/git-pack-refs.txt
index 284956a..2dcabaf 100644
--- a/Documentation/git-pack-refs.txt
+++ b/Documentation/git-pack-refs.txt
@@ -8,7 +8,7 @@
 SYNOPSIS
 --------
 [verse]
-'git pack-refs' [--all] [--no-prune] [--include <pattern>] [--exclude <pattern>]
+'git pack-refs' [--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]
 
 DESCRIPTION
 -----------
@@ -60,6 +60,19 @@
 The command usually removes loose refs under `$GIT_DIR/refs`
 hierarchy after packing them.  This option tells it not to.
 
+--auto::
+
+Pack refs as needed depending on the current state of the ref database. The
+behavior depends on the ref format used by the repository and may change in the
+future.
++
+	- "files": No special handling for `--auto` has been implemented.
++
+	- "reftable": Tables are compacted such that they form a geometric
+	  sequence. For two tables N and N+1, where N+1 is newer, this
+	  maintains the property that N is at least twice as big as N+1. Only
+	  tables that violate this property are compacted.
+
 --include <pattern>::
 
 Pack refs based on a `glob(7)` pattern. Repetitions of this option
diff --git a/Documentation/git-pull.txt b/Documentation/git-pull.txt
index 0e14f8b..b2ae496 100644
--- a/Documentation/git-pull.txt
+++ b/Documentation/git-pull.txt
@@ -87,7 +87,7 @@
 --verbose::
 	Pass --verbose to git-fetch and git-merge.
 
---[no-]recurse-submodules[=yes|on-demand|no]::
+--[no-]recurse-submodules[=(yes|on-demand|no)]::
 	This option controls if new commits of populated submodules should
 	be fetched, and if the working trees of active submodules should be
 	updated, too (see linkgit:git-fetch[1], linkgit:git-config[1] and
@@ -105,7 +105,7 @@
 include::merge-options.txt[]
 
 -r::
---rebase[=false|true|merges|interactive]::
+--rebase[=(false|true|merges|interactive)]::
 	When true, rebase the current branch on top of the upstream
 	branch after fetching. If there is a remote-tracking branch
 	corresponding to the upstream branch and the upstream branch
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index af05708..74df345 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -12,7 +12,7 @@
 	[--onto <newbase> | --keep-base] [<upstream> [<branch>]]
 'git rebase' [-i | --interactive] [<options>] [--exec <cmd>] [--onto <newbase>]
 	--root [<branch>]
-'git rebase' (--continue | --skip | --abort | --quit | --edit-todo | --show-current-patch)
+'git rebase' (--continue|--skip|--abort|--quit|--edit-todo|--show-current-patch)
 
 DESCRIPTION
 -----------
@@ -289,17 +289,25 @@
 +
 See also INCOMPATIBLE OPTIONS below.
 
---empty=(drop|keep|ask)::
+--empty=(drop|keep|stop)::
 	How to handle commits that are not empty to start and are not
 	clean cherry-picks of any upstream commit, but which become
 	empty after rebasing (because they contain a subset of already
-	upstream changes).  With drop (the default), commits that
-	become empty are dropped.  With keep, such commits are kept.
-	With ask (implied by `--interactive`), the rebase will halt when
-	an empty commit is applied allowing you to choose whether to
-	drop it, edit files more, or just commit the empty changes.
-	Other options, like `--exec`, will use the default of drop unless
-	`-i`/`--interactive` is explicitly specified.
+	upstream changes):
++
+--
+`drop`;;
+	The commit will be dropped. This is the default behavior.
+`keep`;;
+	The commit will be kept. This option is implied when `--exec` is
+	specified unless `-i`/`--interactive` is also specified.
+`stop`;;
+`ask`;;
+	The rebase will halt when the commit is applied, allowing you to
+	choose whether to drop it, edit files more, or just commit the empty
+	changes. This option is implied when `-i`/`--interactive` is
+	specified. `ask` is a deprecated synonym of `stop`.
+--
 +
 Note that commits which start empty are kept (unless `--no-keep-empty`
 is specified), and commits which are clean cherry-picks (as determined
@@ -589,21 +597,27 @@
 
 --autosquash::
 --no-autosquash::
-	When the commit log message begins with "squash! ..." or "fixup! ..."
-	or "amend! ...", and there is already a commit in the todo list that
-	matches the same `...`, automatically modify the todo list of
-	`rebase -i`, so that the commit marked for squashing comes right after
-	the commit to be modified, and change the action of the moved commit
-	from `pick` to `squash` or `fixup` or `fixup -C` respectively. A commit
-	matches the `...` if the commit subject matches, or if the `...` refers
-	to the commit's hash. As a fall-back, partial matches of the commit
-	subject work, too. The recommended way to create fixup/amend/squash
-	commits is by using the `--fixup`, `--fixup=amend:` or `--fixup=reword:`
-	and `--squash` options respectively of linkgit:git-commit[1].
+	Automatically squash commits with specially formatted messages into
+	previous commits being rebased.  If a commit message starts with
+	"squash! ", "fixup! " or "amend! ", the remainder of the subject line
+	is taken as a commit specifier, which matches a previous commit if it
+	matches the subject line or the hash of that commit.  If no commit
+	matches fully, matches of the specifier with the start of commit
+	subjects are considered.
 +
-If the `--autosquash` option is enabled by default using the
-configuration variable `rebase.autoSquash`, this option can be
-used to override and disable this setting.
+In the rebase todo list, the actions of squash, fixup and amend commits are
+changed from `pick` to `squash`, `fixup` or `fixup -C`, respectively, and they
+are moved right after the commit they modify.  The `--interactive` option can
+be used to review and edit the todo list before proceeding.
++
+The recommended way to create commits with squash markers is by using the
+`--squash`, `--fixup`, `--fixup=amend:` or `--fixup=reword:` options of
+linkgit:git-commit[1], which take the target commit as an argument and
+automatically fill in the subject line of the new commit from that.
++
+Setting configuration variable `rebase.autoSquash` to true enables
+auto-squashing by default for interactive rebase.  The `--no-autosquash`
+option can be used to override that setting.
 +
 See also INCOMPATIBLE OPTIONS below.
 
@@ -698,7 +712,7 @@
 Similar to the apply backend, by default the merge backend drops
 commits that become empty unless `-i`/`--interactive` is specified (in
 which case it stops and asks the user what to do).  The merge backend
-also has an `--empty=(drop|keep|ask)` option for changing the behavior
+also has an `--empty=(drop|keep|stop)` option for changing the behavior
 of handling commits that become empty.
 
 Directory rename detection
diff --git a/Documentation/git-reflog.txt b/Documentation/git-reflog.txt
index ec64cbf..a929c52 100644
--- a/Documentation/git-reflog.txt
+++ b/Documentation/git-reflog.txt
@@ -10,6 +10,7 @@
 --------
 [verse]
 'git reflog' [show] [<log-options>] [<ref>]
+'git reflog list'
 'git reflog expire' [--expire=<time>] [--expire-unreachable=<time>]
 	[--rewrite] [--updateref] [--stale-fix]
 	[--dry-run | -n] [--verbose] [--all [--single-worktree] | <refs>...]
@@ -39,6 +40,8 @@
 `git reflog show` is an alias for `git log -g --abbrev-commit
 --pretty=oneline`; see linkgit:git-log[1] for more information.
 
+The "list" subcommand lists all refs which have a corresponding reflog.
+
 The "expire" subcommand prunes older reflog entries. Entries older
 than `expire` time, or entries older than `expire-unreachable` time
 and not reachable from the current tip, are removed from the reflog.
diff --git a/Documentation/git-refs.txt b/Documentation/git-refs.txt
new file mode 100644
index 0000000..5b99e04
--- /dev/null
+++ b/Documentation/git-refs.txt
@@ -0,0 +1,61 @@
+git-refs(1)
+===========
+
+NAME
+----
+git-refs - Low-level access to refs
+
+
+SYNOPSIS
+--------
+[verse]
+'git refs migrate' --ref-format=<format> [--dry-run]
+
+DESCRIPTION
+-----------
+
+This command provides low-level access to refs.
+
+COMMANDS
+--------
+
+migrate::
+	Migrate ref store between different formats.
+
+OPTIONS
+-------
+
+The following options are specific to 'git refs migrate':
+
+--ref-format=<format>::
+	The ref format to migrate the ref store to. Can be one of:
++
+include::ref-storage-format.txt[]
+
+--dry-run::
+	Perform the migration, but do not modify the repository. The migrated
+	refs will be written into a separate directory that can be inspected
+	separately. The name of the directory will be reported on stdout. This
+	can be used to double check that the migration works as expected before
+	performing the actual migration.
+
+KNOWN LIMITATIONS
+-----------------
+
+The ref format migration has several known limitations in its current form:
+
+* It is not possible to migrate repositories that have reflogs.
+
+* It is not possible to migrate repositories that have worktrees.
+
+* There is no way to block concurrent writes to the repository during an
+  ongoing migration. Concurrent writes can lead to an inconsistent migrated
+  state. Users are expected to block writes on a higher level. If your
+  repository is registered for scheduled maintenance, it is recommended to
+  unregister it first with git-maintenance(1).
+
+These limitations may eventually be lifted.
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Documentation/git-remote.txt b/Documentation/git-remote.txt
index 1dec314..932a5c3 100644
--- a/Documentation/git-remote.txt
+++ b/Documentation/git-remote.txt
@@ -35,7 +35,7 @@
 -v::
 --verbose::
 	Be a little more verbose and show remote url after name.
-	For promisor remotes, also show which filter (`blob:none` etc.)
+	For promisor remotes, also show which filters (`blob:none` etc.)
 	are configured.
 	NOTE: This must be placed between `remote` and subcommand.
 
diff --git a/Documentation/git-replace.txt b/Documentation/git-replace.txt
index 4f25712..0a65460 100644
--- a/Documentation/git-replace.txt
+++ b/Documentation/git-replace.txt
@@ -114,11 +114,11 @@
 The following formats are available:
 
 * 'short':
-	<replaced sha1>
+	<replaced-sha1>
 * 'medium':
-	<replaced sha1> -> <replacement sha1>
+	<replaced-sha1> -> <replacement-sha1>
 * 'long':
-	<replaced sha1> (<replaced type>) -> <replacement sha1> (<replacement type>)
+	<replaced-sha1> (<replaced-type>) -> <replacement-sha1> (<replacement-type>)
 
 CREATING REPLACEMENT OBJECTS
 ----------------------------
diff --git a/Documentation/git-replay.txt b/Documentation/git-replay.txt
new file mode 100644
index 0000000..8f3300c
--- /dev/null
+++ b/Documentation/git-replay.txt
@@ -0,0 +1,127 @@
+git-replay(1)
+=============
+
+NAME
+----
+git-replay - EXPERIMENTAL: Replay commits on a new base, works with bare repos too
+
+
+SYNOPSIS
+--------
+[verse]
+(EXPERIMENTAL!) 'git replay' ([--contained] --onto <newbase> | --advance <branch>) <revision-range>...
+
+DESCRIPTION
+-----------
+
+Takes ranges of commits and replays them onto a new location. Leaves
+the working tree and the index untouched, and updates no references.
+The output of this command is meant to be used as input to
+`git update-ref --stdin`, which would update the relevant branches
+(see the OUTPUT section below).
+
+THIS COMMAND IS EXPERIMENTAL. THE BEHAVIOR MAY CHANGE.
+
+OPTIONS
+-------
+
+--onto <newbase>::
+	Starting point at which to create the new commits.  May be any
+	valid commit, and not just an existing branch name.
++
+When `--onto` is specified, the update-ref command(s) in the output will
+update the branch(es) in the revision range to point at the new
+commits, similar to the way how `git rebase --update-refs` updates
+multiple branches in the affected range.
+
+--advance <branch>::
+	Starting point at which to create the new commits; must be a
+	branch name.
++
+When `--advance` is specified, the update-ref command(s) in the output
+will update the branch passed as an argument to `--advance` to point at
+the new commits (in other words, this mimics a cherry-pick operation).
+
+<revision-range>::
+	Range of commits to replay. More than one <revision-range> can
+	be passed, but in `--advance <branch>` mode, they should have
+	a single tip, so that it's clear where <branch> should point
+	to. See "Specifying Ranges" in linkgit:git-rev-parse[1] and the
+	"Commit Limiting" options below.
+
+include::rev-list-options.txt[]
+
+OUTPUT
+------
+
+When there are no conflicts, the output of this command is usable as
+input to `git update-ref --stdin`.  It is of the form:
+
+	update refs/heads/branch1 ${NEW_branch1_HASH} ${OLD_branch1_HASH}
+	update refs/heads/branch2 ${NEW_branch2_HASH} ${OLD_branch2_HASH}
+	update refs/heads/branch3 ${NEW_branch3_HASH} ${OLD_branch3_HASH}
+
+where the number of refs updated depends on the arguments passed and
+the shape of the history being replayed.  When using `--advance`, the
+number of refs updated is always one, but for `--onto`, it can be one
+or more (rebasing multiple branches simultaneously is supported).
+
+EXIT STATUS
+-----------
+
+For a successful, non-conflicted replay, the exit status is 0.  When
+the replay has conflicts, the exit status is 1.  If the replay is not
+able to complete (or start) due to some kind of error, the exit status
+is something other than 0 or 1.
+
+EXAMPLES
+--------
+
+To simply rebase `mybranch` onto `target`:
+
+------------
+$ git replay --onto target origin/main..mybranch
+update refs/heads/mybranch ${NEW_mybranch_HASH} ${OLD_mybranch_HASH}
+------------
+
+To cherry-pick the commits from mybranch onto target:
+
+------------
+$ git replay --advance target origin/main..mybranch
+update refs/heads/target ${NEW_target_HASH} ${OLD_target_HASH}
+------------
+
+Note that the first two examples replay the exact same commits and on
+top of the exact same new base, they only differ in that the first
+provides instructions to make mybranch point at the new commits and
+the second provides instructions to make target point at them.
+
+What if you have a stack of branches, one depending upon another, and
+you'd really like to rebase the whole set?
+
+------------
+$ git replay --contained --onto origin/main origin/main..tipbranch
+update refs/heads/branch1 ${NEW_branch1_HASH} ${OLD_branch1_HASH}
+update refs/heads/branch2 ${NEW_branch2_HASH} ${OLD_branch2_HASH}
+update refs/heads/tipbranch ${NEW_tipbranch_HASH} ${OLD_tipbranch_HASH}
+------------
+
+When calling `git replay`, one does not need to specify a range of
+commits to replay using the syntax `A..B`; any range expression will
+do:
+
+------------
+$ git replay --onto origin/main ^base branch1 branch2 branch3
+update refs/heads/branch1 ${NEW_branch1_HASH} ${OLD_branch1_HASH}
+update refs/heads/branch2 ${NEW_branch2_HASH} ${OLD_branch2_HASH}
+update refs/heads/branch3 ${NEW_branch3_HASH} ${OLD_branch3_HASH}
+------------
+
+This will simultaneously rebase `branch1`, `branch2`, and `branch3`,
+all commits they have since `base`, playing them on top of
+`origin/main`. These three branches may have commits on top of `base`
+that they have in common, but that does not need to be the case.
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 912fab9..dc12d38 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -9,7 +9,7 @@
 SYNOPSIS
 --------
 [verse]
-'git rev-parse' [<options>] <args>...
+'git rev-parse' [<options>] <arg>...
 
 DESCRIPTION
 -----------
@@ -18,8 +18,15 @@
 (i.e. parameters that begin with a dash '-') and parameters
 meant for the underlying 'git rev-list' command they use internally
 and flags and parameters for the other commands they use
-downstream of 'git rev-list'.  This command is used to
-distinguish between them.
+downstream of 'git rev-list'.  The primary purpose of this command
+is to allow calling programs to distinguish between them.  There are
+a few other operation modes that have nothing to do with the above
+"help parse command line options".
+
+Unless otherwise specified, most of the options and operation modes
+require you to run this command inside a git repository or a working
+tree that is under the control of a git repository, and will give you
+a fatal error otherwise.
 
 
 OPTIONS
@@ -32,11 +39,15 @@
 
 --parseopt::
 	Use 'git rev-parse' in option parsing mode (see PARSEOPT section below).
+	The command in this mode can be used outside a repository or
+	a working tree controlled by a repository.
 
 --sq-quote::
 	Use 'git rev-parse' in shell quoting mode (see SQ-QUOTE
 	section below). In contrast to the `--sq` option below, this
 	mode only does quoting. Nothing else is done to command input.
+	The command in this mode can be used outside a repository or
+	a working tree controlled by a repository.
 
 Options for --parseopt
 ~~~~~~~~~~~~~~~~~~~~~~
@@ -130,7 +141,7 @@
 	'git diff-{asterisk}'). In contrast to the `--sq-quote` option,
 	the command input is still interpreted as usual.
 
---short[=length]::
+--short[=<length>]::
 	Same as `--verify` but shortens the object name to a unique
 	prefix with at least `length` characters. The minimum length
 	is 4, the default is the effective value of the `core.abbrev`
@@ -159,15 +170,27 @@
 	unfortunately named tag "master"), and shows them as full
 	refnames (e.g. "refs/heads/master").
 
+--output-object-format=(sha1|sha256|storage)::
+
+	Allow oids to be input from any object format that the current
+	repository supports.
+
+	Specifying "sha1" translates if necessary and returns a sha1 oid.
+
+	Specifying "sha256" translates if necessary and returns a sha256 oid.
+
+	Specifying "storage" translates if necessary and returns an oid in
+	encoded in the storage hash algorithm.
+
 Options for Objects
 ~~~~~~~~~~~~~~~~~~~
 
 --all::
 	Show all refs found in `refs/`.
 
---branches[=pattern]::
---tags[=pattern]::
---remotes[=pattern]::
+--branches[=<pattern>]::
+--tags[=<pattern>]::
+--remotes[=<pattern>]::
 	Show all branches, tags, or remote-tracking branches,
 	respectively (i.e., refs found in `refs/heads`,
 	`refs/tags`, or `refs/remotes`, respectively).
@@ -176,7 +199,7 @@
 shown.  If the pattern does not contain a globbing character (`?`,
 `*`, or `[`), it is turned into a prefix match by appending `/*`.
 
---glob=pattern::
+--glob=<pattern>::
 	Show all refs matching the shell glob pattern `pattern`. If
 	the pattern does not start with `refs/`, this is automatically
 	prepended.  If the pattern does not contain a globbing
@@ -197,7 +220,7 @@
 or `--all`. If a trailing '/{asterisk}' is intended, it must be given
 explicitly.
 
---exclude-hidden=[fetch|receive|uploadpack]::
+--exclude-hidden=(fetch|receive|uploadpack)::
 	Do not include refs that would be hidden by `git-fetch`,
 	`git-receive-pack` or `git-upload-pack` by consulting the appropriate
 	`fetch.hideRefs`, `receive.hideRefs` or `uploadpack.hideRefs`
@@ -307,21 +330,24 @@
 	input, multiple algorithms may be printed, space-separated.
 	If not specified, the default is "storage".
 
+--show-ref-format::
+	Show the reference storage format used for the repository.
+
 
 Other Options
 ~~~~~~~~~~~~~
 
---since=datestring::
---after=datestring::
+--since=<datestring>::
+--after=<datestring>::
 	Parse the date string, and output the corresponding
 	--max-age= parameter for 'git rev-list'.
 
---until=datestring::
---before=datestring::
+--until=<datestring>::
+--before=<datestring>::
 	Parse the date string, and output the corresponding
 	--min-age= parameter for 'git rev-list'.
 
-<args>...::
+<arg>...::
 	Flags and parameters to be parsed.
 
 
diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt
index cbe0208..568925d 100644
--- a/Documentation/git-revert.txt
+++ b/Documentation/git-revert.txt
@@ -116,7 +116,7 @@
 
 --reference::
 	Instead of starting the body of the log message with "This
-	reverts <full object name of the commit being reverted>.",
+	reverts <full-object-name-of-the-commit-being-reverted>.",
 	refer to the commit using "--pretty=reference" format
 	(cf. linkgit:git-log[1]).  The `revert.reference`
 	configuration variable can be used to enable this option by
@@ -149,7 +149,7 @@
 _strongly_ recommended to explain why the original commit is being
 reverted.
 In addition, repeatedly reverting reverts will result in increasingly
-unwieldy subject lines, for example 'Reapply "Reapply "<original subject>""'.
+unwieldy subject lines, for example 'Reapply "Reapply "<original-subject>""'.
 Please consider rewording these to be shorter and more unique.
 
 CONFIGURATION
diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt
index 30deb7f..c5d664f 100644
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -9,8 +9,8 @@
 SYNOPSIS
 --------
 [verse]
-'git send-email' [<options>] <file|directory>...
-'git send-email' [<options>] <format-patch options>
+'git send-email' [<options>] (<file>|<directory>)...
+'git send-email' [<options>] <format-patch-options>
 'git send-email' --dump-aliases
 
 
@@ -138,7 +138,7 @@
 
 --compose-encoding=<encoding>::
 	Specify encoding of compose message. Default is the value of the
-	'sendemail.composeencoding'; if that is unspecified, UTF-8 is assumed.
+	'sendemail.composeEncoding'; if that is unspecified, UTF-8 is assumed.
 
 --transfer-encoding=(7bit|8bit|quoted-printable|base64|auto)::
 	Specify the transfer encoding to be used to send the message over SMTP.
@@ -174,7 +174,7 @@
 	Specify a command to run to send the email. The command should
 	be sendmail-like; specifically, it must support the `-i` option.
 	The command will be executed in the shell if necessary.  Default
-	is the value of `sendemail.sendmailcmd`.  If unspecified, and if
+	is the value of `sendemail.sendmailCmd`.  If unspecified, and if
 	--smtp-server is also unspecified, git-send-email will search
 	for `sendmail` in `/usr/sbin`, `/usr/lib` and $PATH.
 
@@ -269,7 +269,7 @@
 	certificates concatenated together: see verify(1) -CAfile and
 	-CApath for more information on these). Set it to an empty string
 	to disable certificate verification. Defaults to the value of the
-	`sendemail.smtpsslcertpath` configuration variable, if set, or the
+	`sendemail.smtpSSLCertPath` configuration variable, if set, or the
 	backing SSL library's compiled-in default otherwise (which should
 	be the best choice on most platforms).
 
@@ -278,7 +278,7 @@
 	if a username is not specified (with `--smtp-user` or `sendemail.smtpUser`),
 	then authentication is not attempted.
 
---smtp-debug=0|1::
+--smtp-debug=(0|1)::
 	Enable (1) or disable (0) debug output. If enabled, SMTP
 	commands and replies will be printed. Useful to debug TLS
 	connection and authentication problems.
@@ -301,7 +301,9 @@
 Automating
 ~~~~~~~~~~
 
---no-[to|cc|bcc]::
+--no-to::
+--no-cc::
+--no-bcc::
 	Clears any list of "To:", "Cc:", "Bcc:" addresses previously
 	set via config.
 
@@ -313,7 +315,7 @@
 	Specify a command to execute once per patch file which
 	should generate patch file specific "To:" entries.
 	Output of this command must be single email address per line.
-	Default is the value of 'sendemail.tocmd' configuration value.
+	Default is the value of 'sendemail.toCmd' configuration value.
 
 --cc-cmd=<command>::
 	Specify a command to execute once per patch file which
@@ -348,19 +350,19 @@
 
 --[no-]signed-off-by-cc::
 	If this is set, add emails found in the `Signed-off-by` trailer or Cc: lines to the
-	cc list. Default is the value of `sendemail.signedoffbycc` configuration
+	cc list. Default is the value of `sendemail.signedOffByCc` configuration
 	value; if that is unspecified, default to --signed-off-by-cc.
 
 --[no-]cc-cover::
 	If this is set, emails found in Cc: headers in the first patch of
 	the series (typically the cover letter) are added to the cc list
-	for each email set. Default is the value of 'sendemail.cccover'
+	for each email set. Default is the value of 'sendemail.ccCover'
 	configuration value; if that is unspecified, default to --no-cc-cover.
 
 --[no-]to-cover::
 	If this is set, emails found in To: headers in the first patch of
 	the series (typically the cover letter) are added to the to list
-	for each email set. Default is the value of 'sendemail.tocover'
+	for each email set. Default is the value of 'sendemail.toCover'
 	configuration value; if that is unspecified, default to --no-to-cover.
 
 --suppress-cc=<category>::
@@ -384,7 +386,7 @@
 - 'all' will suppress all auto cc values.
 --
 +
-Default is the value of `sendemail.suppresscc` configuration value; if
+Default is the value of `sendemail.suppressCc` configuration value; if
 that is unspecified, default to 'self' if --suppress-from is
 specified, as well as 'body' if --no-signed-off-cc is specified.
 
@@ -471,7 +473,7 @@
 	Instead of the normal operation, dump the shorthand alias names from
 	the configured alias file(s), one per line in alphabetical order. Note
 	that this only includes the alias name and not its expanded email addresses.
-	See 'sendemail.aliasesfile' for more information about aliases.
+	See 'sendemail.aliasesFile' for more information about aliases.
 
 
 CONFIGURATION
diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt
index 10fecc5..9a37688 100644
--- a/Documentation/git-status.txt
+++ b/Documentation/git-status.txt
@@ -79,6 +79,8 @@
 `git update-index --untracked-cache` and `git update-index
 --split-index`), Otherwise you can use `no` to have `git status`
 return more quickly without showing untracked files.
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 
 The default can be changed using the status.showUntrackedFiles
 configuration variable documented in linkgit:git-config[1].
@@ -309,7 +311,7 @@
 ------------------------------------------------------------
 # branch.oid <commit> | (initial)        Current commit.
 # branch.head <branch> | (detached)      Current branch.
-# branch.upstream <upstream_branch>      If upstream is set.
+# branch.upstream <upstream-branch>      If upstream is set.
 # branch.ab +<ahead> -<behind>           If upstream is set and
 					 the commit is present.
 ------------------------------------------------------------
@@ -472,7 +474,7 @@
 results, so it could be faster on subsequent runs.
 
 * The `--untracked-files=no` flag or the
-	`status.showUntrackedfiles=false` config (see above for both):
+	`status.showUntrackedFiles=no` config (see above for both):
 	indicate that `git status` should not report untracked
 	files. This is the fastest option. `git status` will not list
 	the untracked files, so you need to be careful to remember if
@@ -502,7 +504,7 @@
 	usually worth the additional size.
 
 * `core.untrackedCache=true` and `core.fsmonitor=true` or
-	`core.fsmonitor=<hook_command_pathname>` (see
+	`core.fsmonitor=<hook-command-pathname>` (see
 	linkgit:git-update-index[1]): enable both the untracked cache
 	and FSMonitor features and only search directories that have
 	been modified since the previous `git status` command.  This
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 6957306..ca0347a 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -136,7 +136,7 @@
 that use linkgit:git-rm[1] instead. See linkgit:gitsubmodules[7] for removal
 options.
 
-update [--init] [--remote] [-N|--no-fetch] [--[no-]recommend-shallow] [-f|--force] [--checkout|--rebase|--merge] [--reference <repository>] [--depth <depth>] [--recursive] [--jobs <n>] [--[no-]single-branch] [--filter <filter spec>] [--] [<path>...]::
+update [--init] [--remote] [-N|--no-fetch] [--[no-]recommend-shallow] [-f|--force] [--checkout|--rebase|--merge] [--reference <repository>] [--depth <depth>] [--recursive] [--jobs <n>] [--[no-]single-branch] [--filter <filter-spec>] [--] [<path>...]::
 +
 --
 Update the registered submodules to match what the superproject
@@ -185,7 +185,7 @@
 If `--recursive` is specified, this command will recurse into the
 registered submodules, and update any nested submodules within.
 
-If `--filter <filter spec>` is specified, the given partial clone filter will be
+If `--filter <filter-spec>` is specified, the given partial clone filter will be
 applied to the submodule. See linkgit:git-rev-list[1] for details on filter
 specifications.
 --
diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index 4e92308..43c68c2 100644
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -37,12 +37,12 @@
 	argument.  Normally this command initializes the current
 	directory.
 
--T<trunk_subdir>;;
---trunk=<trunk_subdir>;;
--t<tags_subdir>;;
---tags=<tags_subdir>;;
--b<branches_subdir>;;
---branches=<branches_subdir>;;
+-T<trunk-subdir>;;
+--trunk=<trunk-subdir>;;
+-t<tags-subdir>;;
+--tags=<tags-subdir>;;
+-b<branches-subdir>;;
+--branches=<branches-subdir>;;
 -s;;
 --stdlayout;;
 	These are optional command-line options for init.  Each of
@@ -726,9 +726,9 @@
 	when tracking a single URL.  The 'log' and 'dcommit' commands
 	no longer require this switch as an argument.
 
--R<remote name>::
---svn-remote <remote name>::
-	Specify the [svn-remote "<remote name>"] section to use,
+-R<remote-name>::
+--svn-remote <remote-name>::
+	Specify the [svn-remote "<remote-name>"] section to use,
 	this allows SVN multiple repositories to be tracked.
 	Default: "svn"
 
diff --git a/Documentation/git-switch.txt b/Documentation/git-switch.txt
index 3e23a82..f38e4c8 100644
--- a/Documentation/git-switch.txt
+++ b/Documentation/git-switch.txt
@@ -59,13 +59,18 @@
 -c <new-branch>::
 --create <new-branch>::
 	Create a new branch named `<new-branch>` starting at
-	`<start-point>` before switching to the branch. This is a
-	convenient shortcut for:
+	`<start-point>` before switching to the branch. This is the
+	transactional equivalent of
 +
 ------------
 $ git branch <new-branch>
 $ git switch <new-branch>
 ------------
++
+that is to say, the branch is not reset/created unless "git switch" is
+successful (e.g., when the branch is in use in another worktree, not
+just the current branch stays the same, but the branch is not reset to
+the start-point, either).
 
 -C <new-branch>::
 --force-create <new-branch>::
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index d42efb3..4494729 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -10,6 +10,7 @@
 --------
 [verse]
 'git tag' [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] [-e]
+	[(--trailer <token>[(=|:)<value>])...]
 	<tagname> [<commit> | <object>]
 'git tag' -d <tagname>...
 'git tag' [-n[<num>]] -l [--contains <commit>] [--no-contains <commit>]
@@ -31,8 +32,8 @@
 `-m <msg>` or `-F <file>` is given, an editor is started for the user to type
 in the tag message.
 
-If `-m <msg>` or `-F <file>` is given and `-a`, `-s`, and `-u <key-id>`
-are absent, `-a` is implied.
+If `-m <msg>` or `-F <file>` or `--trailer <token>[=<value>]` is given
+and `-a`, `-s`, and `-u <key-id>` are absent, `-a` is implied.
 
 Otherwise, a tag reference that points directly at the given object
 (i.e., a lightweight tag) is created.
@@ -178,6 +179,17 @@
 	Implies `-a` if none of `-a`, `-s`, or `-u <key-id>`
 	is given.
 
+--trailer <token>[(=|:)<value>]::
+	Specify a (<token>, <value>) pair that should be applied as a
+	trailer. (e.g. `git tag --trailer "Custom-Key: value"`
+	will add a "Custom-Key" trailer to the tag message.)
+	The `trailer.*` configuration variables
+	(linkgit:git-interpret-trailers[1]) can be used to define if
+	a duplicated trailer is omitted, where in the run of trailers
+	each trailer would appear, and other details.
+	The trailers can be extracted in `git tag --list`, using
+	`--format="%(trailers)"` placeholder.
+
 -e::
 --edit::
 	The message taken from file with `-F` and command line with
@@ -224,7 +236,7 @@
 
 -------------------------------------
 [user]
-    signingKey = <gpg-key_id>
+    signingKey = <gpg-key-id>
 -------------------------------------
 
 `pager.tag` is only respected when listing tags, i.e., when `-l` is
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 8c47890..7128aed 100644
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -25,6 +25,7 @@
 	     [--really-refresh] [--unresolve] [--again | -g]
 	     [--info-only] [--index-info]
 	     [-z] [--stdin] [--index-version <n>]
+	     [--show-index-version]
 	     [--verbose]
 	     [--] [<file>...]
 
diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt
index 0561808..374a2eb 100644
--- a/Documentation/git-update-ref.txt
+++ b/Documentation/git-update-ref.txt
@@ -8,21 +8,21 @@
 SYNOPSIS
 --------
 [verse]
-'git update-ref' [-m <reason>] [--no-deref] (-d <ref> [<oldvalue>] | [--create-reflog] <ref> <newvalue> [<oldvalue>] | --stdin [-z])
+'git update-ref' [-m <reason>] [--no-deref] (-d <ref> [<old-oid>] | [--create-reflog] <ref> <new-oid> [<old-oid>] | --stdin [-z])
 
 DESCRIPTION
 -----------
-Given two arguments, stores the <newvalue> in the <ref>, possibly
+Given two arguments, stores the <new-oid> in the <ref>, possibly
 dereferencing the symbolic refs.  E.g. `git update-ref HEAD
-<newvalue>` updates the current branch head to the new object.
+<new-oid>` updates the current branch head to the new object.
 
-Given three arguments, stores the <newvalue> in the <ref>,
+Given three arguments, stores the <new-oid> in the <ref>,
 possibly dereferencing the symbolic refs, after verifying that
-the current value of the <ref> matches <oldvalue>.
-E.g. `git update-ref refs/heads/master <newvalue> <oldvalue>`
-updates the master branch head to <newvalue> only if its current
-value is <oldvalue>.  You can specify 40 "0" or an empty string
-as <oldvalue> to make sure that the ref you are creating does
+the current value of the <ref> matches <old-oid>.
+E.g. `git update-ref refs/heads/master <new-oid> <old-oid>`
+updates the master branch head to <new-oid> only if its current
+value is <old-oid>.  You can specify 40 "0" or an empty string
+as <old-oid> to make sure that the ref you are creating does
 not exist.
 
 It also allows a "ref" file to be a symbolic pointer to another
@@ -56,15 +56,15 @@
 archive by creating a symlink tree).
 
 With `-d` flag, it deletes the named <ref> after verifying it
-still contains <oldvalue>.
+still contains <old-oid>.
 
 With `--stdin`, update-ref reads instructions from standard input and
 performs all modifications together.  Specify commands of the form:
 
-	update SP <ref> SP <newvalue> [SP <oldvalue>] LF
-	create SP <ref> SP <newvalue> LF
-	delete SP <ref> [SP <oldvalue>] LF
-	verify SP <ref> [SP <oldvalue>] LF
+	update SP <ref> SP <new-oid> [SP <old-oid>] LF
+	create SP <ref> SP <new-oid> LF
+	delete SP <ref> [SP <old-oid>] LF
+	verify SP <ref> [SP <old-oid>] LF
 	option SP <opt> LF
 	start LF
 	prepare LF
@@ -82,10 +82,10 @@
 Alternatively, use `-z` to specify in NUL-terminated format, without
 quoting:
 
-	update SP <ref> NUL <newvalue> NUL [<oldvalue>] NUL
-	create SP <ref> NUL <newvalue> NUL
-	delete SP <ref> NUL [<oldvalue>] NUL
-	verify SP <ref> NUL [<oldvalue>] NUL
+	update SP <ref> NUL <new-oid> NUL [<old-oid>] NUL
+	create SP <ref> NUL <new-oid> NUL
+	delete SP <ref> NUL [<old-oid>] NUL
+	verify SP <ref> NUL [<old-oid>] NUL
 	option SP <opt> NUL
 	start NUL
 	prepare NUL
@@ -100,22 +100,22 @@
 repeated <ref> produce an error.  Command meanings are:
 
 update::
-	Set <ref> to <newvalue> after verifying <oldvalue>, if given.
-	Specify a zero <newvalue> to ensure the ref does not exist
-	after the update and/or a zero <oldvalue> to make sure the
+	Set <ref> to <new-oid> after verifying <old-oid>, if given.
+	Specify a zero <new-oid> to ensure the ref does not exist
+	after the update and/or a zero <old-oid> to make sure the
 	ref does not exist before the update.
 
 create::
-	Create <ref> with <newvalue> after verifying it does not
-	exist.  The given <newvalue> may not be zero.
+	Create <ref> with <new-oid> after verifying it does not
+	exist.  The given <new-oid> may not be zero.
 
 delete::
-	Delete <ref> after verifying it exists with <oldvalue>, if
-	given.  If given, <oldvalue> may not be zero.
+	Delete <ref> after verifying it exists with <old-oid>, if
+	given.  If given, <old-oid> may not be zero.
 
 verify::
-	Verify <ref> against <oldvalue> but do not change it.  If
-	<oldvalue> is zero or missing, the ref must not exist.
+	Verify <ref> against <old-oid> but do not change it.  If
+	<old-oid> is zero or missing, the ref must not exist.
 
 option::
 	Modify the behavior of the next command naming a <ref>.
@@ -141,7 +141,7 @@
 	Abort the transaction, releasing all locks if the transaction is in
 	prepared state.
 
-If all <ref>s can be locked with matching <oldvalue>s
+If all <ref>s can be locked with matching <old-oid>s
 simultaneously, all modifications are performed.  Otherwise, no
 modifications are performed.  Note that while each individual
 <ref> is updated or deleted atomically, a concurrent reader may
@@ -161,7 +161,7 @@
 
 Where "oldsha1" is the 40 character hexadecimal value previously
 stored in <ref>, "newsha1" is the 40 character hexadecimal value of
-<newvalue> and "committer" is the committer's name, email address
+<new-oid> and "committer" is the committer's name, email address
 and date in the standard Git committer ident format.
 
 Optionally with -m:
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 8dacd40..a31a70a 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -11,9 +11,10 @@
 [verse]
 'git' [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]
     [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
-    [-p|--paginate|-P|--no-pager] [--no-replace-objects] [--bare]
-    [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
-    [--config-env=<name>=<envvar>] <command> [<args>]
+    [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--no-lazy-fetch]
+    [--no-optional-locks] [--no-advice] [--bare] [--git-dir=<path>]
+    [--work-tree=<path>] [--namespace=<name>] [--config-env=<name>=<envvar>]
+    <command> [<args>]
 
 DESCRIPTION
 -----------
@@ -174,8 +175,24 @@
 	directory.
 
 --no-replace-objects::
-	Do not use replacement refs to replace Git objects. See
-	linkgit:git-replace[1] for more information.
+	Do not use replacement refs to replace Git objects.
+	This is equivalent to exporting the `GIT_NO_REPLACE_OBJECTS`
+	environment variable with any value.
+	See linkgit:git-replace[1] for more information.
+
+--no-lazy-fetch::
+	Do not fetch missing objects from the promisor remote on
+	demand.  Useful together with `git cat-file -e <object>` to
+	see if the object is locally available.
+	This is equivalent to setting the `GIT_NO_LAZY_FETCH`
+	environment variable to `1`.
+
+--no-optional-locks::
+	Do not perform optional operations that require locks. This is
+	equivalent to setting the `GIT_OPTIONAL_LOCKS` to `0`.
+
+--no-advice::
+	Disable all advice hints from being printed.
 
 --literal-pathspecs::
 	Treat pathspecs literally (i.e. no globbing, no pathspec magic).
@@ -198,11 +215,7 @@
 	Add "icase" magic to all pathspec. This is equivalent to setting
 	the `GIT_ICASE_PATHSPECS` environment variable to `1`.
 
---no-optional-locks::
-	Do not perform optional operations that require locks. This is
-	equivalent to setting the `GIT_OPTIONAL_LOCKS` to `0`.
-
---list-cmds=group[,group...]::
+--list-cmds=<group>[,<group>...]::
 	List commands by group. This is an internal/experimental
 	option and may change or be removed in the future. Supported
 	groups are: builtins, parseopt (builtin commands that use
@@ -556,6 +569,11 @@
 	is always used. The default is "sha1".
 	See `--object-format` in linkgit:git-init[1].
 
+`GIT_DEFAULT_REF_FORMAT`::
+	If this variable is set, the default reference backend format for new
+	repositories will be set to this value. The default is "files".
+	See `--ref-format` in linkgit:git-init[1].
+
 Git Commits
 ~~~~~~~~~~~
 `GIT_AUTHOR_NAME`::
@@ -837,7 +855,7 @@
 collisions).
 +
 In addition, if the variable is set to
-`af_unix:[<socket_type>:]<absolute-pathname>`, Git will try
+`af_unix:[<socket-type>:]<absolute-pathname>`, Git will try
 to open the path as a Unix Domain Socket.  The socket type
 can be either `stream` or `dgram`.
 +
@@ -867,6 +885,10 @@
 	header and packfile URIs. Set this Boolean environment variable to false to prevent this
 	redaction.
 
+`GIT_NO_REPLACE_OBJECTS`::
+	Setting and exporting this environment variable tells Git to
+	ignore replacement refs and do not replace Git objects.
+
 `GIT_LITERAL_PATHSPECS`::
 	Setting this Boolean environment variable to true will cause Git to treat all
 	pathspecs literally, rather than as glob patterns. For example,
@@ -888,6 +910,11 @@
 	Setting this Boolean environment variable to true will cause Git to treat all
 	pathspecs as case-insensitive.
 
+`GIT_NO_LAZY_FETCH`::
+	Setting this Boolean environment variable to true tells Git
+	not to lazily fetch missing objects from the promisor remote
+	on demand.
+
 `GIT_REFLOG_ACTION`::
 	When a ref is updated, reflog entries are created to keep
 	track of the reason why the ref was updated (which is
@@ -937,7 +964,7 @@
 `GIT_PROTOCOL`::
 	For internal use only.  Used in handshaking the wire protocol.
 	Contains a colon ':' separated list of keys with optional values
-	'key[=value]'.  Presence of unknown keys and values must be
+	'<key>[=<value>]'.  Presence of unknown keys and values must be
 	ignored.
 +
 Note that servers may need to be configured to allow this variable to
diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 8c1793c..4338d02 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -100,6 +100,21 @@
 the name of the attribute prefixed with an exclamation point `!`.
 
 
+RESERVED BUILTIN_* ATTRIBUTES
+-----------------------------
+
+builtin_* is a reserved namespace for builtin attribute values. Any
+user defined attributes under this namespace will be ignored and
+trigger a warning.
+
+`builtin_objectmode`
+~~~~~~~~~~~~~~~~~~~~
+This attribute is for filtering files by their file bit modes (40000,
+120000, 160000, 100755, 100644). e.g. ':(attr:builtin_objectmode=160000)'.
+You may also check these values with `git check-attr builtin_objectmode -- <file>`.
+If the object is not in the index `git check-attr --cached` will return unspecified.
+
+
 EFFECTS
 -------
 
@@ -1122,11 +1137,11 @@
 name.
 
 The `merge.*.driver` variable's value is used to construct a
-command to run to merge ancestor's version (`%O`), current
+command to run to common ancestor's version (`%O`), current
 version (`%A`) and the other branches' version (`%B`).  These
 three tokens are replaced with the names of temporary files that
 hold the contents of these versions when the command line is
-built. Additionally, %L will be replaced with the conflict marker
+built. Additionally, `%L` will be replaced with the conflict marker
 size (see below).
 
 The merge driver is expected to leave the result of the merge in
@@ -1144,8 +1159,9 @@
 internal merge and the final merge.
 
 The merge driver can learn the pathname in which the merged result
-will be stored via placeholder `%P`.
-
+will be stored via placeholder `%P`. The conflict labels to be used
+for the common ancestor, local head and other head can be passed by
+using '%S', '%X' and '%Y` respectively.
 
 `conflict-marker-size`
 ^^^^^^^^^^^^^^^^^^^^^^
diff --git a/Documentation/gitcli.txt b/Documentation/gitcli.txt
index e5fac94..7c70932 100644
--- a/Documentation/gitcli.txt
+++ b/Documentation/gitcli.txt
@@ -81,9 +81,6 @@
 Here are the rules regarding the "flags" that you should follow when you are
 scripting Git:
 
- * It's preferred to use the non-dashed form of Git commands, which means that
-   you should prefer `git foo` to `git-foo`.
-
  * Splitting short options to separate words (prefer `git foo -a -b`
    to `git foo -ab`, the latter may not even work).
 
diff --git a/Documentation/gitdiffcore.txt b/Documentation/gitdiffcore.txt
index 3cda2e0..642c512 100644
--- a/Documentation/gitdiffcore.txt
+++ b/Documentation/gitdiffcore.txt
@@ -245,20 +245,20 @@
 
 This transformation limits the set of filepairs to those that change
 specified strings between the preimage and the postimage in a certain
-way.  -S<block of text> and -G<regular expression> options are used to
+way.  -S<block-of-text> and -G<regular-expression> options are used to
 specify different ways these strings are sought.
 
-"-S<block of text>" detects filepairs whose preimage and postimage
+"-S<block-of-text>" detects filepairs whose preimage and postimage
 have different number of occurrences of the specified block of text.
 By definition, it will not detect in-file moves.  Also, when a
 changeset moves a file wholesale without affecting the interesting
 string, diffcore-rename kicks in as usual, and `-S` omits the filepair
 (since the number of occurrences of that string didn't change in that
 rename-detected filepair).  When used with `--pickaxe-regex`, treat
-the <block of text> as an extended POSIX regular expression to match,
+the <block-of-text> as an extended POSIX regular expression to match,
 instead of a literal string.
 
-"-G<regular expression>" (mnemonic: grep) detects filepairs whose
+"-G<regular-expression>" (mnemonic: grep) detects filepairs whose
 textual diff has an added or a deleted line that matches the given
 regular expression.  This means that it will detect in-file (or what
 rename-detection considers the same file) moves, which is noise.  The
diff --git a/Documentation/gitformat-index.txt b/Documentation/gitformat-index.txt
index 0773e5c..145cace 100644
--- a/Documentation/gitformat-index.txt
+++ b/Documentation/gitformat-index.txt
@@ -386,8 +386,8 @@
 	long, "REUC" extension that is M-bytes long, followed by "EOIE",
 	then the hash would be:
 
-	Hash("TREE" + <binary representation of N> +
-		"REUC" + <binary representation of M>)
+	Hash("TREE" + <binary-representation-of-N> +
+		"REUC" + <binary-representation-of-M>)
 
 == Index Entry Offset Table
 
diff --git a/Documentation/gitformat-pack.txt b/Documentation/gitformat-pack.txt
index 9fcb29a..d6ae229 100644
--- a/Documentation/gitformat-pack.txt
+++ b/Documentation/gitformat-pack.txt
@@ -396,6 +396,15 @@
 	    is padded at the end with between 0 and 3 NUL bytes to make the
 	    chunk size a multiple of 4 bytes.
 
+	Bitmapped Packfiles (ID: {'B', 'T', 'M', 'P'})
+	    Stores a table of two 4-byte unsigned integers in network order.
+	    Each table entry corresponds to a single pack (in the order that
+	    they appear above in the `PNAM` chunk). The values for each table
+	    entry are as follows:
+	    - The first bit position (in pseudo-pack order, see below) to
+	      contain an object from that pack.
+	    - The number of bits whose objects are selected from that pack.
+
 	OID Fanout (ID: {'O', 'I', 'D', 'F'})
 	    The ith entry, F[i], stores the number of OIDs with first
 	    byte at most i. Thus F[255] stores the total
@@ -509,6 +518,73 @@
 The MIDX's reverse index is stored in the optional 'RIDX' chunk within
 the MIDX itself.
 
+=== `BTMP` chunk
+
+The Bitmapped Packfiles (`BTMP`) chunk encodes additional information
+about the objects in the multi-pack index's reachability bitmap. Recall
+that objects from the MIDX are arranged in "pseudo-pack" order (see
+above) for reachability bitmaps.
+
+From the example above, suppose we have packs "a", "b", and "c", with
+10, 15, and 20 objects, respectively. In pseudo-pack order, those would
+be arranged as follows:
+
+    |a,0|a,1|...|a,9|b,0|b,1|...|b,14|c,0|c,1|...|c,19|
+
+When working with single-pack bitmaps (or, equivalently, multi-pack
+reachability bitmaps with a preferred pack), linkgit:git-pack-objects[1]
+performs ``verbatim'' reuse, attempting to reuse chunks of the bitmapped
+or preferred packfile instead of adding objects to the packing list.
+
+When a chunk of bytes is reused from an existing pack, any objects
+contained therein do not need to be added to the packing list, saving
+memory and CPU time. But a chunk from an existing packfile can only be
+reused when the following conditions are met:
+
+  - The chunk contains only objects which were requested by the caller
+    (i.e. does not contain any objects which the caller didn't ask for
+    explicitly or implicitly).
+
+  - All objects stored in non-thin packs as offset- or reference-deltas
+    also include their base object in the resulting pack.
+
+The `BTMP` chunk encodes the necessary information in order to implement
+multi-pack reuse over a set of packfiles as described above.
+Specifically, the `BTMP` chunk encodes three pieces of information (all
+32-bit unsigned integers in network byte-order) for each packfile `p`
+that is stored in the MIDX, as follows:
+
+`bitmap_pos`:: The first bit position (in pseudo-pack order) in the
+  multi-pack index's reachability bitmap occupied by an object from `p`.
+
+`bitmap_nr`:: The number of bit positions (including the one at
+  `bitmap_pos`) that encode objects from that pack `p`.
+
+For example, the `BTMP` chunk corresponding to the above example (with
+packs ``a'', ``b'', and ``c'') would look like:
+
+[cols="1,2,2"]
+|===
+| |`bitmap_pos` |`bitmap_nr`
+
+|packfile ``a''
+|`0`
+|`10`
+
+|packfile ``b''
+|`10`
+|`15`
+
+|packfile ``c''
+|`25`
+|`20`
+|===
+
+With this information in place, we can treat each packfile as
+individually reusable in the same fashion as verbatim pack reuse is
+performed on individual packs prior to the implementation of the `BTMP`
+chunk.
+
 == cruft packs
 
 The cruft packs feature offer an alternative to Git's traditional mechanism of
diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 883982e..06e9971 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -243,7 +243,7 @@
 Information about what is to be pushed is provided on the hook's standard
 input with lines of the form:
 
-  <local ref> SP <local object name> SP <remote ref> SP <remote object name> LF
+  <local-ref> SP <local-object-name> SP <remote-ref> SP <remote-object-name> LF
 
 For instance, if the command +git push origin master:foreign+ were run the
 hook would receive a line like the following:
@@ -251,9 +251,9 @@
   refs/heads/master 67890 refs/heads/foreign 12345
 
 although the full object name would be supplied.  If the foreign ref does not
-yet exist the `<remote object name>` will be the all-zeroes object name.  If a
-ref is to be deleted, the `<local ref>` will be supplied as `(delete)` and the
-`<local object name>` will be the all-zeroes object name.  If the local commit
+yet exist the `<remote-object-name>` will be the all-zeroes object name.  If a
+ref is to be deleted, the `<local-ref>` will be supplied as `(delete)` and the
+`<local-object-name>` will be the all-zeroes object name.  If the local commit
 was specified by something other than a name which could be expanded (such as
 `HEAD~`, or an object name) it will be supplied as it was originally given.
 
@@ -275,12 +275,12 @@
 arguments, but for each ref to be updated it receives on standard
 input a line of the format:
 
-  <old-value> SP <new-value> SP <ref-name> LF
+  <old-oid> SP <new-oid> SP <ref-name> LF
 
-where `<old-value>` is the old object name stored in the ref,
-`<new-value>` is the new object name to be stored in the ref and
+where `<old-oid>` is the old object name stored in the ref,
+`<new-oid>` is the new object name to be stored in the ref and
 `<ref-name>` is the full name of the ref.
-When creating a new ref, `<old-value>` is the all-zeroes object name.
+When creating a new ref, `<old-oid>` is the all-zeroes object name.
 
 If the hook exits with non-zero status, none of the refs will be
 updated. If the hook exits with zero, updating of individual refs can
@@ -486,7 +486,7 @@
 This hook is invoked by any Git command that performs reference
 updates. It executes whenever a reference transaction is prepared,
 committed or aborted and may thus get called multiple times. The hook
-does not cover symbolic references (but that may change in the future).
+also supports symbolic reference updates.
 
 The hook takes exactly one argument, which is the current state the
 given reference transaction is in:
@@ -513,6 +513,10 @@
 distinguish these cases, you can inspect the current value of
 `<ref-name>` via `git rev-parse`.
 
+For symbolic reference updates the `<old_value>` and `<new-value>`
+fields could denote references instead of objects. A reference will be
+denoted with a 'ref:' prefix, like `ref:<ref-target>`.
+
 The exit status of the hook is ignored for any state except for the
 "prepared" state. In the "prepared" state, a non-zero exit status will
 cause the transaction to be aborted. The hook will not be called with
diff --git a/Documentation/gitk.txt b/Documentation/gitk.txt
index c2213bb..35b3996 100644
--- a/Documentation/gitk.txt
+++ b/Documentation/gitk.txt
@@ -8,7 +8,7 @@
 SYNOPSIS
 --------
 [verse]
-'gitk' [<options>] [<revision range>] [--] [<path>...]
+'gitk' [<options>] [<revision-range>] [--] [<path>...]
 
 DESCRIPTION
 -----------
@@ -124,7 +124,7 @@
 	range to show.  The command is expected to print on its
 	standard output a list of additional revisions to be shown,
 	one per line.  Use this instead of explicitly specifying a
-	'<revision range>' if the set of commits to show may vary
+	'<revision-range>' if the set of commits to show may vary
 	between refreshes.
 
 --select-commit=<ref>::
diff --git a/Documentation/gitprotocol-capabilities.txt b/Documentation/gitprotocol-capabilities.txt
index d6c6eff..2cf7735 100644
--- a/Documentation/gitprotocol-capabilities.txt
+++ b/Documentation/gitprotocol-capabilities.txt
@@ -378,7 +378,7 @@
 or partial fetch and request that the server omit various objects
 from the packfile.
 
-session-id=<session id>
+session-id=<session-id>
 -----------------------
 
 The server may advertise a session ID that can be used to identify this process
diff --git a/Documentation/gitprotocol-http.txt b/Documentation/gitprotocol-http.txt
index 836b349..ec40a55 100644
--- a/Documentation/gitprotocol-http.txt
+++ b/Documentation/gitprotocol-http.txt
@@ -391,14 +391,14 @@
 
 C: Send one `$GIT_URL/git-upload-pack` request:
 
-   C: 0032want <want #1>...............................
-   C: 0032want <want #2>...............................
+   C: 0032want <want-#1>...............................
+   C: 0032want <want-#2>...............................
    ....
-   C: 0032have <common #1>.............................
-   C: 0032have <common #2>.............................
+   C: 0032have <common-#1>.............................
+   C: 0032have <common-#2>.............................
    ....
-   C: 0032have <have #1>...............................
-   C: 0032have <have #2>...............................
+   C: 0032have <have-#1>...............................
+   C: 0032have <have-#2>...............................
    ....
    C: 0000
 
@@ -512,7 +512,7 @@
 the id obtained through ref discovery as old_id.
 
   update_request  =  command_list
-		     "PACK" <binary data>
+		     "PACK" <binary-data>
 
   command_list    =  PKT-LINE(command NUL cap_list LF)
 		     *(command_pkt)
diff --git a/Documentation/gitprotocol-v2.txt b/Documentation/gitprotocol-v2.txt
index 8c1e7c6..414bc62 100644
--- a/Documentation/gitprotocol-v2.txt
+++ b/Documentation/gitprotocol-v2.txt
@@ -199,7 +199,7 @@
 
 Additional features not supported in the base command will be advertised
 as the value of the command in the capability advertisement in the form
-of a space separated list of features: "<command>=<feature 1> <feature 2>"
+of a space separated list of features: "<command>=<feature-1> <feature-2>"
 
 ls-refs takes in the following arguments:
 
@@ -245,7 +245,7 @@
 
 Additional features not supported in the base command will be advertised
 as the value of the command in the capability advertisement in the form
-of a space separated list of features: "<command>=<feature 1> <feature 2>"
+of a space separated list of features: "<command>=<feature-1> <feature-2>"
 
 A `fetch` request can take the following arguments:
 
@@ -346,7 +346,8 @@
     want-ref <ref>
 	Indicates to the server that the client wants to retrieve a
 	particular ref, where <ref> is the full name of a ref on the
-	server.
+	server.  It is a protocol error to send want-ref for the
+	same ref more than once.
 
 If the 'sideband-all' feature is advertised, the following argument can be
 included in the client's request:
@@ -361,9 +362,10 @@
 If the 'packfile-uris' feature is advertised, the following argument
 can be included in the client's request as well as the potential
 addition of the 'packfile-uris' section in the server's response as
-explained below.
+explained below. Note that at most one `packfile-uris` line can be sent
+to the server.
 
-    packfile-uris <comma-separated list of protocols>
+    packfile-uris <comma-separated-list-of-protocols>
 	Indicates to the server that the client is willing to receive
 	URIs of any of the given protocols in place of objects in the
 	sent packfile. Before performing the connectivity check, the
@@ -534,7 +536,7 @@
 only handle SHA-1.  If the client would like to use a hash algorithm other than
 SHA-1, it should specify its object-format string.
 
-session-id=<session id>
+session-id=<session-id>
 ~~~~~~~~~~~~~~~~~~~~~~~
 
 The server may advertise a session ID that can be used to identify this process
diff --git a/Documentation/gitremote-helpers.txt b/Documentation/gitremote-helpers.txt
index ed8da42..d0be008 100644
--- a/Documentation/gitremote-helpers.txt
+++ b/Documentation/gitremote-helpers.txt
@@ -479,14 +479,14 @@
 'option depth' <depth>::
 	Deepens the history of a shallow repository.
 
-'option deepen-since <timestamp>::
+'option deepen-since' <timestamp>::
 	Deepens the history of a shallow repository based on time.
 
-'option deepen-not <ref>::
+'option deepen-not' <ref>::
 	Deepens the history of a shallow repository excluding ref.
 	Multiple options add up.
 
-'option deepen-relative {'true'|'false'}::
+'option deepen-relative' {'true'|'false'}::
 	Deepens the history of a shallow repository relative to
 	current boundary. Only valid when used with "option depth".
 
@@ -526,7 +526,7 @@
 'option pushcert' {'true'|'false'}::
 	GPG sign pushes.
 
-'option push-option <string>::
+'option push-option' <string>::
 	Transmit <string> as a push option. As the push option
 	must not contain LF or NUL characters, the string is not encoded.
 
@@ -542,13 +542,10 @@
 	transaction.  If successful, all refs will be updated, or none will.  If the
 	remote side does not support this capability, the push will fail.
 
-'option object-format' {'true'|algorithm}::
-	If 'true', indicate that the caller wants hash algorithm information
+'option object-format true'::
+	Indicate that the caller wants hash algorithm information
 	to be passed back from the remote.  This mode is used when fetching
 	refs.
-+
-If set to an algorithm, indicate that the caller wants to interact with
-the remote side using that algorithm.
 
 SEE ALSO
 --------
diff --git a/Documentation/gitsubmodules.txt b/Documentation/gitsubmodules.txt
index 8400d59..f7b5a25 100644
--- a/Documentation/gitsubmodules.txt
+++ b/Documentation/gitsubmodules.txt
@@ -151,7 +151,7 @@
 is not affected. This can be undone using `git submodule init`.
 
  * Deleted submodule: A submodule can be deleted by running
-`git rm <submodule path> && git commit`. This can be undone
+`git rm <submodule-path> && git commit`. This can be undone
 using `git revert`.
 +
 The deletion removes the superproject's tracking data, which are
@@ -229,7 +229,7 @@
   git submodule add <URL> <path>
 
   # Occasionally update the submodule to a new version:
-  git -C <path> checkout <new version>
+  git -C <path> checkout <new-version>
   git add <path>
   git commit -m "update submodule to new version"
 
diff --git a/Documentation/gitweb.conf.txt b/Documentation/gitweb.conf.txt
index 59fc1d2..8598358 100644
--- a/Documentation/gitweb.conf.txt
+++ b/Documentation/gitweb.conf.txt
@@ -343,7 +343,7 @@
 	Label for the "home link" at the top of all pages, leading to `$home_link`
 	(usually the main gitweb page, which contains the projects list).  It is
 	used as the first component of gitweb's "breadcrumb trail":
-	`<home link> / <project> / <action>`.  Can be set at build time using
+	`<home-link> / <project> / <action>`.  Can be set at build time using
 	the `GITWEB_HOME_LINK_STR` variable.  By default it is set to "projects",
 	as this link leads to the list of projects.  Another popular choice is to
 	set it to the name of site.  Note that it is treated as raw HTML so it
@@ -604,9 +604,9 @@
 Each `%feature` hash element is a hash reference and has the following
 structure:
 ----------------------------------------------------------------------
-"<feature_name>" => {
-	"sub" => <feature-sub (subroutine)>,
-	"override" => <allow-override (boolean)>,
+"<feature-name>" => {
+	"sub" => <feature-sub-(subroutine)>,
+	"override" => <allow-override-(boolean)>,
 	"default" => [ <options>... ]
 },
 ----------------------------------------------------------------------
@@ -614,7 +614,7 @@
 features the structure of appropriate `%feature` hash element has a simpler
 form:
 ----------------------------------------------------------------------
-"<feature_name>" => {
+"<feature-name>" => {
 	"override" => 0,
 	"default" => [ <options>... ]
 },
diff --git a/Documentation/gitweb.txt b/Documentation/gitweb.txt
index ddd4a0f..56d24a3 100644
--- a/Documentation/gitweb.txt
+++ b/Documentation/gitweb.txt
@@ -305,7 +305,7 @@
 looks like this:
 
 -----------------------------------------------------------------------
-.../gitweb.cgi/<repo>/<action>/<revision_from>:/<path_from>..<revision_to>:/<path_to>?<arguments>
+.../gitweb.cgi/<repo>/<action>/<revision-from>:/<path-from>..<revision-to>:/<path-to>?<arguments>
 -----------------------------------------------------------------------
 
 
diff --git a/Documentation/glossary-content.txt b/Documentation/glossary-content.txt
index f7d98c1..30b394a 100644
--- a/Documentation/glossary-content.txt
+++ b/Documentation/glossary-content.txt
@@ -497,20 +497,18 @@
 	unusual refs.
 
 [[def_pseudoref]]pseudoref::
-	Pseudorefs are a class of files under `$GIT_DIR` which behave
-	like refs for the purposes of rev-parse, but which are treated
-	specially by git.  Pseudorefs both have names that are all-caps,
-	and always start with a line consisting of a
-	<<def_SHA1,SHA-1>> followed by whitespace.  So, HEAD is not a
-	pseudoref, because it is sometimes a symbolic ref.  They might
-	optionally contain some additional data.  `MERGE_HEAD` and
-	`CHERRY_PICK_HEAD` are examples.  Unlike
-	<<def_per_worktree_ref,per-worktree refs>>, these files cannot
-	be symbolic refs, and never have reflogs.  They also cannot be
-	updated through the normal ref update machinery.  Instead,
-	they are updated by directly writing to the files.  However,
-	they can be read as if they were refs, so `git rev-parse
-	MERGE_HEAD` will work.
+	A ref that has different semantics than normal refs. These refs can be
+	read via normal Git commands, but cannot be written to by commands like
+	linkgit:git-update-ref[1].
++
+The following pseudorefs are known to Git:
+
+ - `FETCH_HEAD` is written by linkgit:git-fetch[1] or linkgit:git-pull[1]. It
+   may refer to multiple object IDs. Each object ID is annotated with metadata
+   indicating where it was fetched from and its fetch status.
+
+ - `MERGE_HEAD` is written by linkgit:git-merge[1] when resolving merge
+   conflicts. It contains all commit IDs which are being merged.
 
 [[def_pull]]pull::
 	Pulling a <<def_branch,branch>> means to <<def_fetch,fetch>> it and
@@ -552,20 +550,38 @@
 	to the result.
 
 [[def_ref]]ref::
-	A name that begins with `refs/` (e.g. `refs/heads/master`)
-	that points to an <<def_object_name,object name>> or another
-	ref (the latter is called a <<def_symref,symbolic ref>>).
+	A name that that points to an <<def_object_name,object name>> or
+	another ref (the latter is called a <<def_symref,symbolic ref>>).
 	For convenience, a ref can sometimes be abbreviated when used
 	as an argument to a Git command; see linkgit:gitrevisions[7]
 	for details.
 	Refs are stored in the <<def_repository,repository>>.
 +
 The ref namespace is hierarchical.
-Different subhierarchies are used for different purposes (e.g. the
-`refs/heads/` hierarchy is used to represent local branches).
+Ref names must either start with `refs/` or be located in the root of
+the hierarchy. For the latter, their name must follow these rules:
 +
-There are a few special-purpose refs that do not begin with `refs/`.
-The most notable example is `HEAD`.
+ - The name consists of only upper-case characters or underscores.
+
+ - The name ends with "`_HEAD`" or is equal to "`HEAD`".
++
+There are some irregular refs in the root of the hierarchy that do not
+match these rules. The following list is exhaustive and shall not be
+extended in the future:
++
+ - `AUTO_MERGE`
+
+ - `BISECT_EXPECTED_REV`
+
+ - `NOTES_MERGE_PARTIAL`
+
+ - `NOTES_MERGE_REF`
+
+ - `MERGE_AUTOSTASH`
++
+Different subhierarchies are used for different purposes. For example,
+the `refs/heads/` hierarchy is used to represent local branches whereas
+the `refs/tags/` hierarchy is used to represent local tags..
 
 [[def_reflog]]reflog::
 	A reflog shows the local "history" of a ref.  In other words,
@@ -576,7 +592,8 @@
 [[def_refspec]]refspec::
 	A "refspec" is used by <<def_fetch,fetch>> and
 	<<def_push,push>> to describe the mapping between remote
-	<<def_ref,ref>> and local ref.
+	<<def_ref,ref>> and local ref. See linkgit:git-fetch[1] or
+	linkgit:git-push[1] for details.
 
 [[def_remote]]remote repository::
 	A <<def_repository,repository>> which is used to track the same
diff --git a/Documentation/howto/update-hook-example.txt b/Documentation/howto/update-hook-example.txt
index 151ee84..4e727de 100644
--- a/Documentation/howto/update-hook-example.txt
+++ b/Documentation/howto/update-hook-example.txt
@@ -100,7 +100,7 @@
 
 if test -f "$allowed_users_file"
 then
-  rc=$(cat $allowed_users_file | grep -v '^#' | grep -v '^$' |
+  rc=$(grep -Ev '^(#|$)' $allowed_users_file |
     while read heads user_patterns
     do
       # does this rule apply to us?
@@ -138,7 +138,7 @@
 
 if test -f "$allowed_groups_file"
 then
-  rc=$(cat $allowed_groups_file | grep -v '^#' | grep -v '^$' |
+  rc=$(grep -Ev '^(#|$)' $allowed_groups_file |
     while read heads group_patterns
     do
       # does this rule apply to us?
diff --git a/Documentation/lint-manpages.sh b/Documentation/lint-manpages.sh
new file mode 100755
index 0000000..92cfc0a
--- /dev/null
+++ b/Documentation/lint-manpages.sh
@@ -0,0 +1,108 @@
+#!/bin/sh
+
+extract_variable () {
+	(
+		cat ../Makefile
+		cat <<EOF
+print_variable:
+	@\$(foreach b,\$($1),echo XXX \$(b:\$X=) YYY;)
+EOF
+	) |
+	make -C .. -f - print_variable 2>/dev/null |
+	sed -n -e 's/.*XXX \(.*\) YYY.*/\1/p'
+}
+
+check_missing_docs () (
+	ret=0
+
+	for v in $ALL_COMMANDS
+	do
+		case "$v" in
+		git-merge-octopus) continue;;
+		git-merge-ours) continue;;
+		git-merge-recursive) continue;;
+		git-merge-resolve) continue;;
+		git-merge-subtree) continue;;
+		git-fsck-objects) continue;;
+		git-init-db) continue;;
+		git-remote-*) continue;;
+		git-stage) continue;;
+		git-legacy-*) continue;;
+		git-?*--?* ) continue ;;
+		esac
+
+		if ! test -f "$v.txt"
+		then
+			echo "no doc: $v"
+			ret=1
+		fi
+
+		if ! sed -e '1,/^### command list/d' -e '/^#/d' ../command-list.txt |
+			grep -q "^$v[ 	]"
+		then
+			case "$v" in
+			git)
+				;;
+			*)
+				echo "no link: $v"
+				ret=1
+				;;
+			esac
+		fi
+	done
+
+	exit $ret
+)
+
+check_extraneous_docs () {
+	(
+		sed -e '1,/^### command list/d' \
+		    -e '/^#/d' \
+		    -e '/guide$/d' \
+		    -e '/interfaces$/d' \
+		    -e 's/[ 	].*//' \
+		    -e 's/^/listed /' ../command-list.txt
+		make print-man1 |
+		grep '\.txt$' |
+		sed -e 's|^|documented |' \
+		    -e 's/\.txt//'
+	) | (
+		all_commands="$(printf "%s " "$ALL_COMMANDS" "$BUILT_INS" "$EXCLUDED_PROGRAMS" | tr '\n' ' ')"
+		ret=0
+
+		while read how cmd
+		do
+			case " $all_commands " in
+			*" $cmd "*) ;;
+			*)
+				echo "removed but $how: $cmd"
+				ret=1;;
+			esac
+		done
+
+		exit $ret
+	)
+}
+
+BUILT_INS="$(extract_variable BUILT_INS)"
+ALL_COMMANDS="$(extract_variable ALL_COMMANDS)"
+EXCLUDED_PROGRAMS="$(extract_variable EXCLUDED_PROGRAMS)"
+
+findings=$(
+	if ! check_missing_docs
+	then
+		ret=1
+	fi
+
+	if ! check_extraneous_docs
+	then
+		ret=1
+	fi
+
+	exit $ret
+)
+ret=$?
+
+printf "%s" "$findings" | sort
+
+exit $ret
diff --git a/Documentation/mergetools/vimdiff.txt b/Documentation/mergetools/vimdiff.txt
index d1a4c46..befa86d 100644
--- a/Documentation/mergetools/vimdiff.txt
+++ b/Documentation/mergetools/vimdiff.txt
@@ -177,7 +177,8 @@
 
 When using these variants, in order to specify a custom layout you will have to
 set configuration variables `mergetool.gvimdiff.layout` and
-`mergetool.nvimdiff.layout` instead of `mergetool.vimdiff.layout`
+`mergetool.nvimdiff.layout` instead of `mergetool.vimdiff.layout` (though the
+latter will be used as fallback if the variant-specific one is not set).
 
 In addition, for backwards compatibility with previous Git versions, you can
 also append `1`, `2` or `3` to either `vimdiff` or any of the variants (ex:
diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index d38b4ab..8ee940b 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -316,9 +316,8 @@
    `Reviewed-by`.
 ** 'only[=<bool>]': select whether non-trailer lines from the trailer
    block should be included.
-** 'separator=<sep>': specify a separator inserted between trailer
-   lines. When this option is not given each trailer line is
-   terminated with a line feed character. The string <sep> may contain
+** 'separator=<sep>': specify the separator inserted between trailer
+   lines. Defaults to a line feed character. The string <sep> may contain
    the literal formatting codes described above. To use comma as
    separator one must use `%x2C` as it would otherwise be parsed as
    next option. E.g., `%(trailers:key=Ticket,separator=%x2C )`
@@ -329,10 +328,9 @@
    `%(trailers:only,unfold=true)` unfolds and shows all trailer lines.
 ** 'keyonly[=<bool>]': only show the key part of the trailer.
 ** 'valueonly[=<bool>]': only show the value part of the trailer.
-** 'key_value_separator=<sep>': specify a separator inserted between
-   trailer lines. When this option is not given each trailer key-value
-   pair is separated by ": ". Otherwise it shares the same semantics
-   as 'separator=<sep>' above.
+** 'key_value_separator=<sep>': specify the separator inserted between
+   the key and value of each trailer. Defaults to ": ". Otherwise it
+   shares the same semantics as 'separator=<sep>' above.
 
 NOTE: Some placeholders may depend on other options given to the
 revision traversal engine. For example, the `%g*` reflog options will
diff --git a/Documentation/ref-storage-format.txt b/Documentation/ref-storage-format.txt
new file mode 100644
index 0000000..14fff8a
--- /dev/null
+++ b/Documentation/ref-storage-format.txt
@@ -0,0 +1,3 @@
+* `files` for loose files with packed-refs. This is the default.
+* `reftable` for the reftable format. This format is experimental and its
+  internals are subject to change.
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index a583b52..00ccf68 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -316,12 +316,12 @@
 With `--pretty` format other than `oneline` and `reference` (for obvious reasons),
 this causes the output to have two extra lines of information
 taken from the reflog.  The reflog designator in the output may be shown
-as `ref@{Nth}` (where `Nth` is the reverse-chronological index in the
-reflog) or as `ref@{timestamp}` (with the timestamp for that entry),
+as `ref@{<Nth>}` (where _<Nth>_ is the reverse-chronological index in the
+reflog) or as `ref@{<timestamp>}` (with the _<timestamp>_ for that entry),
 depending on a few rules:
 +
 --
-1. If the starting point is specified as `ref@{Nth}`, show the index
+1. If the starting point is specified as `ref@{<Nth>}`, show the index
    format.
 +
 2. If the starting point was specified as `ref@{now}`, show the
@@ -341,8 +341,11 @@
 Under `--pretty=reference`, this information will not be shown at all.
 
 --merge::
-	After a failed merge, show refs that touch files having a
-	conflict and don't exist on all heads to merge.
+	Show commits touching conflicted paths in the range `HEAD...<other>`,
+	where `<other>` is the first existing pseudoref in `MERGE_HEAD`,
+	`CHERRY_PICK_HEAD`, `REVERT_HEAD` or `REBASE_HEAD`. Only works
+	when the index has unmerged entries. This option can be used to show
+	relevant commits when resolving conflicts from a 3-way merge.
 
 --boundary::
 	Output excluded boundary commits. Boundary commits are
@@ -1019,6 +1022,10 @@
 +
 The form '--missing=print' is like 'allow-any', but will also print a
 list of the missing objects.  Object IDs are prefixed with a ``?'' character.
++
+If some tips passed to the traversal are missing, they will be
+considered as missing too, and the traversal will ignore them. In case
+we cannot get their Object ID though, an error will be raised.
 
 --exclude-promisor-objects::
 	(For internal use only.)  Prefilter object traversal at
diff --git a/Documentation/technical/repository-version.txt b/Documentation/technical/repository-version.txt
index 045a767..4728142 100644
--- a/Documentation/technical/repository-version.txt
+++ b/Documentation/technical/repository-version.txt
@@ -100,3 +100,9 @@
 multiple working directory mode, "config" file is shared while
 "config.worktree" is per-working directory (i.e., it's in
 GIT_COMMON_DIR/worktrees/<id>/config.worktree)
+
+==== `refStorage`
+
+Specifies the file format for the ref database. The valid values are
+`files` (loose references with a packed-refs file) and `reftable` (see
+Documentation/technical/reftable.txt).
diff --git a/Documentation/technical/unit-tests.txt b/Documentation/technical/unit-tests.txt
new file mode 100644
index 0000000..206037f
--- /dev/null
+++ b/Documentation/technical/unit-tests.txt
@@ -0,0 +1,240 @@
+= Unit Testing
+
+In our current testing environment, we spend a significant amount of effort
+crafting end-to-end tests for error conditions that could easily be captured by
+unit tests (or we simply forgo some hard-to-setup and rare error conditions).
+Unit tests additionally provide stability to the codebase and can simplify
+debugging through isolation. Writing unit tests in pure C, rather than with our
+current shell/test-tool helper setup, simplifies test setup, simplifies passing
+data around (no shell-isms required), and reduces testing runtime by not
+spawning a separate process for every test invocation.
+
+We believe that a large body of unit tests, living alongside the existing test
+suite, will improve code quality for the Git project.
+
+== Definitions
+
+For the purposes of this document, we'll use *test framework* to refer to
+projects that support writing test cases and running tests within the context
+of a single executable. *Test harness* will refer to projects that manage
+running multiple executables (each of which may contain multiple test cases) and
+aggregating their results.
+
+In reality, these terms are not strictly defined, and many of the projects
+discussed below contain features from both categories.
+
+For now, we will evaluate projects solely on their framework features. Since we
+are relying on having TAP output (see below), we can assume that any framework
+can be made to work with a harness that we can choose later.
+
+
+== Summary
+
+We believe the best way forward is to implement a custom TAP framework for the
+Git project. We use a version of the framework originally proposed in
+https://lore.kernel.org/git/c902a166-98ce-afba-93f2-ea6027557176@gmail.com/[1].
+
+See the <<framework-selection,Framework Selection>> section below for the
+rationale behind this decision.
+
+
+== Choosing a test harness
+
+During upstream discussion, it was occasionally noted that `prove` provides many
+convenient features, such as scheduling slower tests first, or re-running
+previously failed tests.
+
+While we already support the use of `prove` as a test harness for the shell
+tests, it is not strictly required. The t/Makefile allows running shell tests
+directly (though with interleaved output if parallelism is enabled). Git
+developers who wish to use `prove` as a more advanced harness can do so by
+setting DEFAULT_TEST_TARGET=prove in their config.mak.
+
+We will follow a similar approach for unit tests: by default the test
+executables will be run directly from the t/Makefile, but `prove` can be
+configured with DEFAULT_UNIT_TEST_TARGET=prove.
+
+
+[[framework-selection]]
+== Framework selection
+
+There are a variety of features we can use to rank the candidate frameworks, and
+those features have different priorities:
+
+* Critical features: we probably won't consider a framework without these
+** Can we legally / easily use the project?
+*** <<license,License>>
+*** <<vendorable-or-ubiquitous,Vendorable or ubiquitous>>
+*** <<maintainable-extensible,Maintainable / extensible>>
+*** <<major-platform-support,Major platform support>>
+** Does the project support our bare-minimum needs?
+*** <<tap-support,TAP support>>
+*** <<diagnostic-output,Diagnostic output>>
+*** <<runtime-skippable-tests,Runtime-skippable tests>>
+* Nice-to-have features:
+** <<parallel-execution,Parallel execution>>
+** <<mock-support,Mock support>>
+** <<signal-error-handling,Signal & error-handling>>
+* Tie-breaker stats
+** <<project-kloc,Project KLOC>>
+** <<adoption,Adoption>>
+
+[[license]]
+=== License
+
+We must be able to legally use the framework in connection with Git. As Git is
+licensed only under GPLv2, we must eliminate any LGPLv3, GPLv3, or Apache 2.0
+projects.
+
+[[vendorable-or-ubiquitous]]
+=== Vendorable or ubiquitous
+
+We want to avoid forcing Git developers to install new tools just to run unit
+tests. Any prospective frameworks and harnesses must either be vendorable
+(meaning, we can copy their source directly into Git's repository), or so
+ubiquitous that it is reasonable to expect that most developers will have the
+tools installed already.
+
+[[maintainable-extensible]]
+=== Maintainable / extensible
+
+It is unlikely that any pre-existing project perfectly fits our needs, so any
+project we select will need to be actively maintained and open to accepting
+changes. Alternatively, assuming we are vendoring the source into our repo, it
+must be simple enough that Git developers can feel comfortable making changes as
+needed to our version.
+
+In the comparison table below, "True" means that the framework seems to have
+active developers, that it is simple enough that Git developers can make changes
+to it, and that the project seems open to accepting external contributions (or
+that it is vendorable). "Partial" means that at least one of the above
+conditions holds.
+
+[[major-platform-support]]
+=== Major platform support
+
+At a bare minimum, unit-testing must work on Linux, MacOS, and Windows.
+
+In the comparison table below, "True" means that it works on all three major
+platforms with no issues. "Partial" means that there may be annoyances on one or
+more platforms, but it is still usable in principle.
+
+[[tap-support]]
+=== TAP support
+
+The https://testanything.org/[Test Anything Protocol] is a text-based interface
+that allows tests to communicate with a test harness. It is already used by
+Git's integration test suite. Supporting TAP output is a mandatory feature for
+any prospective test framework.
+
+In the comparison table below, "True" means this is natively supported.
+"Partial" means TAP output must be generated by post-processing the native
+output.
+
+Frameworks that do not have at least Partial support will not be evaluated
+further.
+
+[[diagnostic-output]]
+=== Diagnostic output
+
+When a test case fails, the framework must generate enough diagnostic output to
+help developers find the appropriate test case in source code in order to debug
+the failure.
+
+[[runtime-skippable-tests]]
+=== Runtime-skippable tests
+
+Test authors may wish to skip certain test cases based on runtime circumstances,
+so the framework should support this.
+
+[[parallel-execution]]
+=== Parallel execution
+
+Ideally, we will build up a significant collection of unit test cases, most
+likely split across multiple executables. It will be necessary to run these
+tests in parallel to enable fast develop-test-debug cycles.
+
+In the comparison table below, "True" means that individual test cases within a
+single test executable can be run in parallel. We assume that executable-level
+parallelism can be handled by the test harness.
+
+[[mock-support]]
+=== Mock support
+
+Unit test authors may wish to test code that interacts with objects that may be
+inconvenient to handle in a test (e.g. interacting with a network service).
+Mocking allows test authors to provide a fake implementation of these objects
+for more convenient tests.
+
+[[signal-error-handling]]
+=== Signal & error handling
+
+The test framework should fail gracefully when test cases are themselves buggy
+or when they are interrupted by signals during runtime.
+
+[[project-kloc]]
+=== Project KLOC
+
+The size of the project, in thousands of lines of code as measured by
+https://dwheeler.com/sloccount/[sloccount] (rounded up to the next multiple of
+1,000). As a tie-breaker, we probably prefer a project with fewer LOC.
+
+[[adoption]]
+=== Adoption
+
+As a tie-breaker, we prefer a more widely-used project. We use the number of
+GitHub / GitLab stars to estimate this.
+
+
+=== Comparison
+
+:true: [lime-background]#True#
+:false: [red-background]#False#
+:partial: [yellow-background]#Partial#
+
+:gpl: [lime-background]#GPL v2#
+:isc: [lime-background]#ISC#
+:mit: [lime-background]#MIT#
+:expat: [lime-background]#Expat#
+:lgpl: [lime-background]#LGPL v2.1#
+
+:custom-impl: https://lore.kernel.org/git/c902a166-98ce-afba-93f2-ea6027557176@gmail.com/[Custom Git impl.]
+:greatest: https://github.com/silentbicycle/greatest[Greatest]
+:criterion: https://github.com/Snaipe/Criterion[Criterion]
+:c-tap: https://github.com/rra/c-tap-harness/[C TAP]
+:check: https://libcheck.github.io/check/[Check]
+
+[format="csv",options="header",width="33%",subs="specialcharacters,attributes,quotes,macros"]
+|=====
+Framework,"<<license,License>>","<<vendorable-or-ubiquitous,Vendorable or ubiquitous>>","<<maintainable-extensible,Maintainable / extensible>>","<<major-platform-support,Major platform support>>","<<tap-support,TAP support>>","<<diagnostic-output,Diagnostic output>>","<<runtime--skippable-tests,Runtime- skippable tests>>","<<parallel-execution,Parallel execution>>","<<mock-support,Mock support>>","<<signal-error-handling,Signal & error handling>>","<<project-kloc,Project KLOC>>","<<adoption,Adoption>>"
+{custom-impl},{gpl},{true},{true},{true},{true},{true},{true},{false},{false},{false},1,0
+{greatest},{isc},{true},{partial},{true},{partial},{true},{true},{false},{false},{false},3,1400
+{criterion},{mit},{false},{partial},{true},{true},{true},{true},{true},{false},{true},19,1800
+{c-tap},{expat},{true},{partial},{partial},{true},{false},{true},{false},{false},{false},4,33
+{check},{lgpl},{false},{partial},{true},{true},{true},{false},{false},{false},{true},17,973
+|=====
+
+=== Additional framework candidates
+
+Several suggested frameworks have been eliminated from consideration:
+
+* Incompatible licenses:
+** https://github.com/zorgnax/libtap[libtap] (LGPL v3)
+** https://cmocka.org/[cmocka] (Apache 2.0)
+* Missing source: https://www.kindahl.net/mytap/doc/index.html[MyTap]
+* No TAP support:
+** https://nemequ.github.io/munit/[µnit]
+** https://github.com/google/cmockery[cmockery]
+** https://github.com/lpabon/cmockery2[cmockery2]
+** https://github.com/ThrowTheSwitch/Unity[Unity]
+** https://github.com/siu/minunit[minunit]
+** https://cunit.sourceforge.net/[CUnit]
+
+
+== Milestones
+
+* Add useful tests of library-like code
+* Integrate with
+  https://lore.kernel.org/git/20230502211454.1673000-1-calvinwan@google.com/[stdlib
+  work]
+* Run alongside regular `make test` target
diff --git a/Documentation/trace2-target-values.txt b/Documentation/trace2-target-values.txt
index 3985b6d..06f1953 100644
--- a/Documentation/trace2-target-values.txt
+++ b/Documentation/trace2-target-values.txt
@@ -5,7 +5,7 @@
 * `<absolute-pathname>` - Writes to the file in append mode. If the target
 already exists and is a directory, the traces will be written to files (one
 per process) underneath the given directory.
-* `af_unix:[<socket_type>:]<absolute-pathname>` - Write to a
+* `af_unix:[<socket-type>:]<absolute-pathname>` - Write to a
 Unix DomainSocket (on platforms that support them).  Socket
 type can be either `stream` or `dgram`; if omitted Git will
 try both.
diff --git a/Documentation/urls.txt b/Documentation/urls.txt
index 4e79c15..7cec85a 100644
--- a/Documentation/urls.txt
+++ b/Documentation/urls.txt
@@ -15,14 +15,14 @@
 
 The following syntaxes may be used with them:
 
-- ssh://{startsb}user@{endsb}host.xz{startsb}:port{endsb}/path/to/repo.git/
-- git://host.xz{startsb}:port{endsb}/path/to/repo.git/
-- http{startsb}s{endsb}://host.xz{startsb}:port{endsb}/path/to/repo.git/
-- ftp{startsb}s{endsb}://host.xz{startsb}:port{endsb}/path/to/repo.git/
+- ++ssh://++{startsb}__<user>__++@++{endsb}__<host>__{startsb}++:++__<port>__{endsb}++/++__<path-to-git-repo>__
+- ++git://++__<host>__{startsb}:__<port>__{endsb}++/++__<path-to-git-repo>__
+- ++http++{startsb}++s++{endsb}++://++__<host>__{startsb}++:++__<port>__{endsb}++/++__<path-to-git-repo>__
+- ++ftp++{startsb}++s++{endsb}++://++__<host>__{startsb}++:++__<port>__{endsb}++/++__<path-to-git-repo>__
 
 An alternative scp-like syntax may also be used with the ssh protocol:
 
-- {startsb}user@{endsb}host.xz:path/to/repo.git/
+- {startsb}__<user>__++@++{endsb}__<host>__++:/++__<path-to-git-repo>__
 
 This syntax is only recognized if there are no slashes before the
 first colon. This helps differentiate a local path that contains a
@@ -30,40 +30,40 @@
 absolute path or `./foo:bar` to avoid being misinterpreted as an ssh
 url.
 
-The ssh and git protocols additionally support ~username expansion:
+The ssh and git protocols additionally support ++~++__<username>__ expansion:
 
-- ssh://{startsb}user@{endsb}host.xz{startsb}:port{endsb}/~{startsb}user{endsb}/path/to/repo.git/
-- git://host.xz{startsb}:port{endsb}/~{startsb}user{endsb}/path/to/repo.git/
-- {startsb}user@{endsb}host.xz:/~{startsb}user{endsb}/path/to/repo.git/
+- ++ssh://++{startsb}__<user>__++@++{endsb}__<host>__{startsb}++:++__<port>__{endsb}++/~++__<user>__++/++__<path-to-git-repo>__
+- ++git://++__<host>__{startsb}++:++__<port>__{endsb}++/~++__<user>__++/++__<path-to-git-repo>__
+- {startsb}__<user>__++@++{endsb}__<host>__++:~++__<user>__++/++__<path-to-git-repo>__
 
 For local repositories, also supported by Git natively, the following
 syntaxes may be used:
 
-- /path/to/repo.git/
-- \file:///path/to/repo.git/
+- `/path/to/repo.git/`
+- ++file:///path/to/repo.git/++
 
 ifndef::git-clone[]
 These two syntaxes are mostly equivalent, except when cloning, when
-the former implies --local option. See linkgit:git-clone[1] for
+the former implies `--local` option. See linkgit:git-clone[1] for
 details.
 endif::git-clone[]
 
 ifdef::git-clone[]
 These two syntaxes are mostly equivalent, except the former implies
---local option.
+`--local` option.
 endif::git-clone[]
 
-'git clone', 'git fetch' and 'git pull', but not 'git push', will also
+`git clone`, `git fetch` and `git pull`, but not `git push`, will also
 accept a suitable bundle file. See linkgit:git-bundle[1].
 
 When Git doesn't know how to handle a certain transport protocol, it
-attempts to use the 'remote-<transport>' remote helper, if one
+attempts to use the `remote-`{empty}__<transport>__ remote helper, if one
 exists. To explicitly request a remote helper, the following syntax
 may be used:
 
-- <transport>::<address>
+- _<transport>_::__<address>__
 
-where <address> may be a path, a server and path, or an arbitrary
+where _<address>_ may be a path, a server and path, or an arbitrary
 URL-like string recognized by the specific remote helper being
 invoked. See linkgit:gitremote-helpers[7] for details.
 
@@ -72,10 +72,11 @@
 use will be rewritten into URLs that work), you can create a
 configuration section of the form:
 
-------------
-	[url "<actual url base>"]
-		insteadOf = <other url base>
-------------
+[verse]
+--
+	[url "__<actual-url-base>__"]
+		insteadOf = _<other-url-base>_
+--
 
 For example, with this:
 
@@ -91,10 +92,11 @@
 If you want to rewrite URLs for push only, you can create a
 configuration section of the form:
 
-------------
-	[url "<actual url base>"]
-		pushInsteadOf = <other url base>
-------------
+[verse]
+--
+	[url "__<actual-url-base>__"]
+		pushInsteadOf = _<other-url-base>_
+--
 
 For example, with this:
 
diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index 5d32ff2..90a4189 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -4093,15 +4093,46 @@
 about the data in the object.  It's worth noting that the SHA-1 hash
 that is used to name the object is the hash of the original data
 plus this header, so `sha1sum` 'file' does not match the object name
-for 'file'.
+for 'file' (the earliest versions of Git hashed slightly differently
+but the conclusion is still the same).
+
+The following is a short example that demonstrates how these hashes
+can be generated manually:
+
+Let's assume a small text file with some simple content:
+
+-------------------------------------------------
+$ echo "Hello world" >hello.txt
+-------------------------------------------------
+
+We can now manually generate the hash Git would use for this file:
+
+- The object we want the hash for is of type "blob" and its size is
+  12 bytes.
+
+- Prepend the object header to the file content and feed this to
+  `sha1sum`:
+
+-------------------------------------------------
+$ { printf "blob 12\0"; cat hello.txt; } | sha1sum
+802992c4220de19a90767f3000a79a31b98d0df7  -
+-------------------------------------------------
+
+This manually constructed hash can be verified using `git hash-object`
+which of course hides the addition of the header:
+
+-------------------------------------------------
+$ git hash-object hello.txt
+802992c4220de19a90767f3000a79a31b98d0df7
+-------------------------------------------------
 
 As a result, the general consistency of an object can always be tested
 independently of the contents or the type of the object: all objects can
 be validated by verifying that (a) their hashes match the content of the
 file and (b) the object successfully inflates to a stream of bytes that
 forms a sequence of
-`<ascii type without space> + <space> + <ascii decimal size> +
-<byte\0> + <binary object data>`.
+`<ascii-type-without-space> + <space> + <ascii-decimal-size> +
+<byte\0> + <binary-object-data>`.
 
 The structured objects can further have their structure and
 connectivity to other objects verified. This is generally done with
@@ -4123,7 +4154,8 @@
 ----------------------------------------------------
 
 The initial revision lays the foundation for almost everything Git has
-today, but is small enough to read in one sitting.
+today (even though details may differ in a few places), but is small
+enough to read in one sitting.
 
 Note that terminology has changed since that revision.  For example, the
 README in that revision uses the word "changeset" to describe what we
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index fcaa390..814cdcf 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v2.43.5
+DEF_VER=v2.45.GIT
 
 LF='
 '
@@ -11,7 +11,7 @@
 if test -f version
 then
 	VN=$(cat version) || VN="$DEF_VER"
-elif test -d ${GIT_DIR:-.git} -o -f .git &&
+elif { test -d "${GIT_DIR:-.git}" || test -f .git; } &&
 	VN=$(git describe --match "v[0-9]*" HEAD 2>/dev/null) &&
 	case "$VN" in
 	*$LF*) (exit 1) ;;
diff --git a/Makefile b/Makefile
index 1618ee2..990aa3c 100644
--- a/Makefile
+++ b/Makefile
@@ -409,6 +409,9 @@
 # to the "<name>" of the corresponding `compat/fsmonitor/fsm-settings-<name>.c`
 # that implements the `fsm_os_settings__*()` routines.
 #
+# Define LINK_FUZZ_PROGRAMS if you want `make all` to also build the fuzz test
+# programs in oss-fuzz/.
+#
 # === Optional library: libintl ===
 #
 # Define NO_GETTEXT if you don't want Git output to be translated.
@@ -682,6 +685,9 @@
 TEST_OBJS =
 TEST_PROGRAMS_NEED_X =
 THIRD_PARTY_SOURCES =
+UNIT_TEST_PROGRAMS =
+UNIT_TEST_DIR = t/unit-tests
+UNIT_TEST_BIN = $(UNIT_TEST_DIR)/bin
 
 # Having this variable in your environment would break pipelines because
 # you cause "cd" to echo its destination to stdout.  It can also take
@@ -749,17 +755,6 @@
 
 ETAGS_TARGET = TAGS
 
-FUZZ_OBJS += oss-fuzz/fuzz-commit-graph.o
-FUZZ_OBJS += oss-fuzz/fuzz-pack-headers.o
-FUZZ_OBJS += oss-fuzz/fuzz-pack-idx.o
-.PHONY: fuzz-objs
-fuzz-objs: $(FUZZ_OBJS)
-
-# Always build fuzz objects even if not testing, to prevent bit-rot.
-all:: $(FUZZ_OBJS)
-
-FUZZ_PROGRAMS += $(patsubst %.o,%,$(FUZZ_OBJS))
-
 # Empty...
 EXTRA_PROGRAMS =
 
@@ -788,8 +783,8 @@
 TEST_BUILTINS_OBJS += test-config.o
 TEST_BUILTINS_OBJS += test-crontab.o
 TEST_BUILTINS_OBJS += test-csprng.o
-TEST_BUILTINS_OBJS += test-ctype.o
 TEST_BUILTINS_OBJS += test-date.o
+TEST_BUILTINS_OBJS += test-delete-gpgsig.o
 TEST_BUILTINS_OBJS += test-delta.o
 TEST_BUILTINS_OBJS += test-dir-iterator.o
 TEST_BUILTINS_OBJS += test-drop-caches.o
@@ -798,8 +793,7 @@
 TEST_BUILTINS_OBJS += test-dump-split-index.o
 TEST_BUILTINS_OBJS += test-dump-untracked-cache.o
 TEST_BUILTINS_OBJS += test-env-helper.o
-TEST_BUILTINS_OBJS += test-example-decorate.o
-TEST_BUILTINS_OBJS += test-fast-rebase.o
+TEST_BUILTINS_OBJS += test-example-tap.o
 TEST_BUILTINS_OBJS += test-find-pack.o
 TEST_BUILTINS_OBJS += test-fsmonitor-client.o
 TEST_BUILTINS_OBJS += test-genrandom.o
@@ -825,7 +819,6 @@
 TEST_BUILTINS_OBJS += test-path-utils.o
 TEST_BUILTINS_OBJS += test-pcre2-config.o
 TEST_BUILTINS_OBJS += test-pkt-line.o
-TEST_BUILTINS_OBJS += test-prio-queue.o
 TEST_BUILTINS_OBJS += test-proc-receive.o
 TEST_BUILTINS_OBJS += test-progress.o
 TEST_BUILTINS_OBJS += test-reach.o
@@ -845,7 +838,6 @@
 TEST_BUILTINS_OBJS += test-sha256.o
 TEST_BUILTINS_OBJS += test-sigchain.o
 TEST_BUILTINS_OBJS += test-simple-ipc.o
-TEST_BUILTINS_OBJS += test-strcmp-offset.o
 TEST_BUILTINS_OBJS += test-string-list.o
 TEST_BUILTINS_OBJS += test-submodule-config.o
 TEST_BUILTINS_OBJS += test-submodule-nested-repo-config.o
@@ -1055,6 +1047,7 @@
 LIB_OBJS += list-objects.o
 LIB_OBJS += lockfile.o
 LIB_OBJS += log-tree.o
+LIB_OBJS += loose.o
 LIB_OBJS += ls-refs.o
 LIB_OBJS += mailinfo.o
 LIB_OBJS += mailmap.o
@@ -1067,6 +1060,7 @@
 LIB_OBJS += merge-recursive.o
 LIB_OBJS += merge.o
 LIB_OBJS += midx.o
+LIB_OBJS += midx-write.o
 LIB_OBJS += name-hash.o
 LIB_OBJS += negotiator/default.o
 LIB_OBJS += negotiator/noop.o
@@ -1075,6 +1069,7 @@
 LIB_OBJS += notes-merge.o
 LIB_OBJS += notes-utils.o
 LIB_OBJS += notes.o
+LIB_OBJS += object-file-convert.o
 LIB_OBJS += object-file.o
 LIB_OBJS += object-name.o
 LIB_OBJS += object.o
@@ -1121,6 +1116,7 @@
 LIB_OBJS += refs.o
 LIB_OBJS += refs/debug.o
 LIB_OBJS += refs/files-backend.o
+LIB_OBJS += refs/reftable-backend.o
 LIB_OBJS += refs/iterator.o
 LIB_OBJS += refs/packed-backend.o
 LIB_OBJS += refs/ref-cache.o
@@ -1285,11 +1281,13 @@
 BUILTIN_OBJS += builtin/rebase.o
 BUILTIN_OBJS += builtin/receive-pack.o
 BUILTIN_OBJS += builtin/reflog.o
+BUILTIN_OBJS += builtin/refs.o
 BUILTIN_OBJS += builtin/remote-ext.o
 BUILTIN_OBJS += builtin/remote-fd.o
 BUILTIN_OBJS += builtin/remote.o
 BUILTIN_OBJS += builtin/repack.o
 BUILTIN_OBJS += builtin/replace.o
+BUILTIN_OBJS += builtin/replay.o
 BUILTIN_OBJS += builtin/rerere.o
 BUILTIN_OBJS += builtin/reset.o
 BUILTIN_OBJS += builtin/rev-list.o
@@ -1335,6 +1333,20 @@
 THIRD_PARTY_SOURCES += sha1collisiondetection/%
 THIRD_PARTY_SOURCES += sha1dc/%
 
+UNIT_TEST_PROGRAMS += t-ctype
+UNIT_TEST_PROGRAMS += t-example-decorate
+UNIT_TEST_PROGRAMS += t-hash
+UNIT_TEST_PROGRAMS += t-mem-pool
+UNIT_TEST_PROGRAMS += t-prio-queue
+UNIT_TEST_PROGRAMS += t-reftable-basics
+UNIT_TEST_PROGRAMS += t-strbuf
+UNIT_TEST_PROGRAMS += t-strcmp-offset
+UNIT_TEST_PROGRAMS += t-strvec
+UNIT_TEST_PROGRAMS += t-trailer
+UNIT_TEST_PROGS = $(patsubst %,$(UNIT_TEST_BIN)/%$X,$(UNIT_TEST_PROGRAMS))
+UNIT_TEST_OBJS = $(patsubst %,$(UNIT_TEST_DIR)/%.o,$(UNIT_TEST_PROGRAMS))
+UNIT_TEST_OBJS += $(UNIT_TEST_DIR)/test-lib.o
+
 # xdiff and reftable libs may in turn depend on what is in libgit.a
 GITLIBS = common-main.o $(LIB_FILE) $(XDIFF_LIB) $(REFTABLE_LIB) $(LIB_FILE)
 EXTLIBS =
@@ -1537,23 +1549,23 @@
 endif
 
 ifeq ($(uname_S),Darwin)
-	ifndef NO_FINK
-		ifeq ($(shell test -d /sw/lib && echo y),y)
+        ifndef NO_FINK
+                ifeq ($(shell test -d /sw/lib && echo y),y)
 			BASIC_CFLAGS += -I/sw/include
 			BASIC_LDFLAGS += -L/sw/lib
-		endif
-	endif
-	ifndef NO_DARWIN_PORTS
-		ifeq ($(shell test -d /opt/local/lib && echo y),y)
+                endif
+        endif
+        ifndef NO_DARWIN_PORTS
+                ifeq ($(shell test -d /opt/local/lib && echo y),y)
 			BASIC_CFLAGS += -I/opt/local/include
 			BASIC_LDFLAGS += -L/opt/local/lib
-		endif
-	endif
-	ifndef NO_APPLE_COMMON_CRYPTO
+                endif
+        endif
+        ifndef NO_APPLE_COMMON_CRYPTO
 		NO_OPENSSL = YesPlease
 		APPLE_COMMON_CRYPTO = YesPlease
 		COMPAT_CFLAGS += -DAPPLE_COMMON_CRYPTO
-	endif
+        endif
 	PTHREAD_LIBS =
 endif
 
@@ -1575,7 +1587,7 @@
 
 ifdef LIBPCREDIR
 	BASIC_CFLAGS += -I$(LIBPCREDIR)/include
-	EXTLIBS += -L$(LIBPCREDIR)/$(lib) $(CC_LD_DYNPATH)$(LIBPCREDIR)/$(lib)
+	EXTLIBS += $(call libpath_template,$(LIBPCREDIR)/$(lib))
 endif
 
 ifdef HAVE_ALLOCA_H
@@ -1592,23 +1604,23 @@
 	REMOTE_CURL_NAMES =
 	EXCLUDED_PROGRAMS += git-http-fetch git-http-push
 else
-	ifdef CURLDIR
+        ifdef CURLDIR
 		# Try "-Wl,-rpath=$(CURLDIR)/$(lib)" in such a case.
 		CURL_CFLAGS = -I$(CURLDIR)/include
-		CURL_LIBCURL = -L$(CURLDIR)/$(lib) $(CC_LD_DYNPATH)$(CURLDIR)/$(lib)
-	else
+		CURL_LIBCURL = $(call libpath_template,$(CURLDIR)/$(lib))
+        else
 		CURL_CFLAGS =
 		CURL_LIBCURL =
-	endif
+        endif
 
-	ifndef CURL_LDFLAGS
+        ifndef CURL_LDFLAGS
 		CURL_LDFLAGS = $(eval CURL_LDFLAGS := $$(shell $$(CURL_CONFIG) --libs))$(CURL_LDFLAGS)
-	endif
+        endif
 	CURL_LIBCURL += $(CURL_LDFLAGS)
 
-	ifndef CURL_CFLAGS
+        ifndef CURL_CFLAGS
 		CURL_CFLAGS = $(eval CURL_CFLAGS := $$(shell $$(CURL_CONFIG) --cflags))$(CURL_CFLAGS)
-	endif
+        endif
 	BASIC_CFLAGS += $(CURL_CFLAGS)
 
 	REMOTE_CURL_PRIMARY = git-remote-http$X
@@ -1616,49 +1628,49 @@
 	REMOTE_CURL_NAMES = $(REMOTE_CURL_PRIMARY) $(REMOTE_CURL_ALIASES)
 	PROGRAM_OBJS += http-fetch.o
 	PROGRAMS += $(REMOTE_CURL_NAMES)
-	ifndef NO_EXPAT
+        ifndef NO_EXPAT
 		PROGRAM_OBJS += http-push.o
-	endif
+        endif
 	curl_check := $(shell (echo 072200; $(CURL_CONFIG) --vernum | sed -e '/^70[BC]/s/^/0/') 2>/dev/null | sort -r | sed -ne 2p)
-	ifeq "$(curl_check)" "072200"
+        ifeq "$(curl_check)" "072200"
 		USE_CURL_FOR_IMAP_SEND = YesPlease
-	endif
-	ifdef USE_CURL_FOR_IMAP_SEND
+        endif
+        ifdef USE_CURL_FOR_IMAP_SEND
 		BASIC_CFLAGS += -DUSE_CURL_FOR_IMAP_SEND
 		IMAP_SEND_BUILDDEPS = http.o
 		IMAP_SEND_LDFLAGS += $(CURL_LIBCURL)
-	endif
-	ifndef NO_EXPAT
-		ifdef EXPATDIR
+        endif
+        ifndef NO_EXPAT
+                ifdef EXPATDIR
 			BASIC_CFLAGS += -I$(EXPATDIR)/include
-			EXPAT_LIBEXPAT = -L$(EXPATDIR)/$(lib) $(CC_LD_DYNPATH)$(EXPATDIR)/$(lib) -lexpat
-		else
+			EXPAT_LIBEXPAT = $(call libpath_template,$(EXPATDIR)/$(lib)) -lexpat
+                else
 			EXPAT_LIBEXPAT = -lexpat
-		endif
-		ifdef EXPAT_NEEDS_XMLPARSE_H
+                endif
+                ifdef EXPAT_NEEDS_XMLPARSE_H
 			BASIC_CFLAGS += -DEXPAT_NEEDS_XMLPARSE_H
-		endif
-	endif
+                endif
+        endif
 endif
 IMAP_SEND_LDFLAGS += $(OPENSSL_LINK) $(OPENSSL_LIBSSL) $(LIB_4_CRYPTO)
 
 ifdef ZLIB_PATH
 	BASIC_CFLAGS += -I$(ZLIB_PATH)/include
-	EXTLIBS += -L$(ZLIB_PATH)/$(lib) $(CC_LD_DYNPATH)$(ZLIB_PATH)/$(lib)
+	EXTLIBS += $(call libpath_template,$(ZLIB_PATH)/$(lib))
 endif
 EXTLIBS += -lz
 
 ifndef NO_OPENSSL
 	OPENSSL_LIBSSL = -lssl
-	ifdef OPENSSLDIR
+        ifdef OPENSSLDIR
 		BASIC_CFLAGS += -I$(OPENSSLDIR)/include
-		OPENSSL_LINK = -L$(OPENSSLDIR)/$(lib) $(CC_LD_DYNPATH)$(OPENSSLDIR)/$(lib)
-	else
+		OPENSSL_LINK = $(call libpath_template,$(OPENSSLDIR)/$(lib))
+        else
 		OPENSSL_LINK =
-	endif
-	ifdef NEEDS_CRYPTO_WITH_SSL
+        endif
+        ifdef NEEDS_CRYPTO_WITH_SSL
 		OPENSSL_LIBSSL += -lcrypto
-	endif
+        endif
 else
 	BASIC_CFLAGS += -DNO_OPENSSL
 	OPENSSL_LIBSSL =
@@ -1676,18 +1688,18 @@
 endif
 endif
 ifndef NO_ICONV
-	ifdef NEEDS_LIBICONV
-		ifdef ICONVDIR
+        ifdef NEEDS_LIBICONV
+                ifdef ICONVDIR
 			BASIC_CFLAGS += -I$(ICONVDIR)/include
-			ICONV_LINK = -L$(ICONVDIR)/$(lib) $(CC_LD_DYNPATH)$(ICONVDIR)/$(lib)
-		else
+			ICONV_LINK = $(call libpath_template,$(ICONVDIR)/$(lib))
+                else
 			ICONV_LINK =
-		endif
-		ifdef NEEDS_LIBINTL_BEFORE_LIBICONV
+                endif
+                ifdef NEEDS_LIBINTL_BEFORE_LIBICONV
 			ICONV_LINK += -lintl
-		endif
+                endif
 		EXTLIBS += $(ICONV_LINK) -liconv
-	endif
+        endif
 endif
 ifdef ICONV_OMITS_BOM
 	BASIC_CFLAGS += -DICONV_OMITS_BOM
@@ -1808,10 +1820,10 @@
 	COMPAT_CFLAGS += -DNO_MMAP
 	COMPAT_OBJS += compat/mmap.o
 else
-	ifdef USE_WIN32_MMAP
+        ifdef USE_WIN32_MMAP
 		COMPAT_CFLAGS += -DUSE_WIN32_MMAP
 		COMPAT_OBJS += compat/win32mmap.o
-	endif
+        endif
 endif
 ifdef MMAP_PREVENTS_DELETE
 	BASIC_CFLAGS += -DMMAP_PREVENTS_DELETE
@@ -1936,11 +1948,11 @@
 	BASIC_CFLAGS += -DSHA1_DC
 	LIB_OBJS += sha1dc_git.o
 ifdef DC_SHA1_EXTERNAL
-	ifdef DC_SHA1_SUBMODULE
-		ifneq ($(DC_SHA1_SUBMODULE),auto)
+        ifdef DC_SHA1_SUBMODULE
+                ifneq ($(DC_SHA1_SUBMODULE),auto)
 $(error Only set DC_SHA1_EXTERNAL or DC_SHA1_SUBMODULE, not both)
-		endif
-	endif
+                endif
+        endif
 	BASIC_CFLAGS += -DDC_SHA1_EXTERNAL
 	EXTLIBS += -lsha1detectcoll
 else
@@ -2342,7 +2354,7 @@
 
 all:: $(ALL_COMMANDS_TO_INSTALL) $(SCRIPT_LIB) $(OTHER_PROGRAMS) GIT-BUILD-OPTIONS
 ifneq (,$X)
-	$(QUIET_BUILT_IN)$(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_COMMANDS_TO_INSTALL) $(OTHER_PROGRAMS))), test -d '$p' -o '$p' -ef '$p$X' || $(RM) '$p';)
+	$(QUIET_BUILT_IN)$(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_COMMANDS_TO_INSTALL) $(OTHER_PROGRAMS))), if test ! -d '$p' && test ! '$p' -ef '$p$X'; then $(RM) '$p'; fi;)
 endif
 
 all::
@@ -2352,6 +2364,29 @@
 endif
 	$(QUIET_SUBDIR0)templates $(QUIET_SUBDIR1) SHELL_PATH='$(SHELL_PATH_SQ)' PERL_PATH='$(PERL_PATH_SQ)'
 
+# If you add a new fuzzer, please also make sure to run it in
+# ci/run-build-and-minimal-fuzzers.sh so that we make sure it still links and
+# runs in the future.
+FUZZ_OBJS += oss-fuzz/dummy-cmd-main.o
+FUZZ_OBJS += oss-fuzz/fuzz-commit-graph.o
+FUZZ_OBJS += oss-fuzz/fuzz-config.o
+FUZZ_OBJS += oss-fuzz/fuzz-date.o
+FUZZ_OBJS += oss-fuzz/fuzz-pack-headers.o
+FUZZ_OBJS += oss-fuzz/fuzz-pack-idx.o
+.PHONY: fuzz-objs
+fuzz-objs: $(FUZZ_OBJS)
+
+# Always build fuzz objects even if not testing, to prevent bit-rot.
+all:: $(FUZZ_OBJS)
+
+FUZZ_PROGRAMS += $(patsubst %.o,%,$(filter-out %dummy-cmd-main.o,$(FUZZ_OBJS)))
+
+# Build fuzz programs when possible, even without the necessary fuzzing support,
+# to prevent bit-rot.
+ifdef LINK_FUZZ_PROGRAMS
+all:: $(FUZZ_PROGRAMS)
+endif
+
 please_set_SHELL_PATH_to_a_more_modern_shell:
 	@$$(:)
 
@@ -2635,20 +2670,17 @@
 REFTABLE_OBJS += reftable/pq.o
 REFTABLE_OBJS += reftable/reader.o
 REFTABLE_OBJS += reftable/record.o
-REFTABLE_OBJS += reftable/refname.o
 REFTABLE_OBJS += reftable/generic.o
 REFTABLE_OBJS += reftable/stack.o
 REFTABLE_OBJS += reftable/tree.o
 REFTABLE_OBJS += reftable/writer.o
 
-REFTABLE_TEST_OBJS += reftable/basics_test.o
 REFTABLE_TEST_OBJS += reftable/block_test.o
 REFTABLE_TEST_OBJS += reftable/dump.o
 REFTABLE_TEST_OBJS += reftable/merged_test.o
 REFTABLE_TEST_OBJS += reftable/pq_test.o
 REFTABLE_TEST_OBJS += reftable/record_test.o
 REFTABLE_TEST_OBJS += reftable/readwrite_test.o
-REFTABLE_TEST_OBJS += reftable/refname_test.o
 REFTABLE_TEST_OBJS += reftable/stack_test.o
 REFTABLE_TEST_OBJS += reftable/test_framework.o
 REFTABLE_TEST_OBJS += reftable/tree_test.o
@@ -2676,6 +2708,7 @@
 OBJECTS += $(XDIFF_OBJS)
 OBJECTS += $(FUZZ_OBJS)
 OBJECTS += $(REFTABLE_OBJS) $(REFTABLE_TEST_OBJS)
+OBJECTS += $(UNIT_TEST_OBJS)
 
 ifndef NO_CURL
 	OBJECTS += http.o http-walker.o remote-curl.o
@@ -3178,7 +3211,7 @@
 
 test_bindir_programs := $(patsubst %,bin-wrappers/%,$(BINDIR_PROGRAMS_NEED_X) $(BINDIR_PROGRAMS_NO_X) $(TEST_PROGRAMS_NEED_X))
 
-all:: $(TEST_PROGRAMS) $(test_bindir_programs)
+all:: $(TEST_PROGRAMS) $(test_bindir_programs) $(UNIT_TEST_PROGS)
 
 bin-wrappers/%: wrap-for-bin.sh
 	$(call mkdir_p_parent_template)
@@ -3206,7 +3239,7 @@
 
 .PRECIOUS: $(TEST_OBJS)
 
-t/helper/test-tool$X: $(patsubst %,t/helper/%,$(TEST_BUILTINS_OBJS))
+t/helper/test-tool$X: $(patsubst %,t/helper/%,$(TEST_BUILTINS_OBJS)) $(UNIT_TEST_DIR)/test-lib.o
 
 t/helper/test-%$X: t/helper/test-%.o GIT-LDFLAGS $(GITLIBS) $(REFTABLE_TEST_LIB)
 	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(filter %.a,$^) $(LIBS)
@@ -3604,12 +3637,12 @@
 .PHONY: rpm
 
 ifneq ($(INCLUDE_DLLS_IN_ARTIFACTS),)
-OTHER_PROGRAMS += $(shell echo *.dll t/helper/*.dll)
+OTHER_PROGRAMS += $(shell echo *.dll t/helper/*.dll t/unit-tests/bin/*.dll)
 endif
 
 artifacts-tar:: $(ALL_COMMANDS_TO_INSTALL) $(SCRIPT_LIB) $(OTHER_PROGRAMS) \
 		GIT-BUILD-OPTIONS $(TEST_PROGRAMS) $(test_bindir_programs) \
-		$(MOFILES)
+		$(UNIT_TEST_PROGS) $(MOFILES)
 	$(QUIET_SUBDIR0)templates $(QUIET_SUBDIR1) \
 		SHELL_PATH='$(SHELL_PATH_SQ)' PERL_PATH='$(PERL_PATH_SQ)'
 	test -n "$(ARTIFACTS_DIRECTORY)"
@@ -3664,7 +3697,7 @@
 	$(RM) contrib/coccinelle/*.cocci.patch
 
 clean: profile-clean coverage-clean cocciclean
-	$(RM) -r .build
+	$(RM) -r .build $(UNIT_TEST_BIN)
 	$(RM) po/git.pot po/git-core.pot
 	$(RM) git.res
 	$(RM) $(OBJECTS)
@@ -3727,42 +3760,6 @@
 .PHONY: check-docs
 check-docs::
 	$(MAKE) -C Documentation lint-docs
-	@(for v in $(patsubst %$X,%,$(ALL_COMMANDS)); \
-	do \
-		case "$$v" in \
-		git-merge-octopus | git-merge-ours | git-merge-recursive | \
-		git-merge-resolve | git-merge-subtree | \
-		git-fsck-objects | git-init-db | \
-		git-remote-* | git-stage | git-legacy-* | \
-		git-?*--?* ) continue ;; \
-		esac ; \
-		test -f "Documentation/$$v.txt" || \
-		echo "no doc: $$v"; \
-		sed -e '1,/^### command list/d' -e '/^#/d' command-list.txt | \
-		grep -q "^$$v[ 	]" || \
-		case "$$v" in \
-		git) ;; \
-		*) echo "no link: $$v";; \
-		esac ; \
-	done; \
-	( \
-		sed -e '1,/^### command list/d' \
-		    -e '/^#/d' \
-		    -e '/guide$$/d' \
-		    -e '/interfaces$$/d' \
-		    -e 's/[ 	].*//' \
-		    -e 's/^/listed /' command-list.txt; \
-		$(MAKE) -C Documentation print-man1 | \
-		grep '\.txt$$' | \
-		sed -e 's|^|documented |' \
-		    -e 's/\.txt//'; \
-	) | while read how cmd; \
-	do \
-		case " $(patsubst %$X,%,$(ALL_COMMANDS) $(BUILT_INS) $(EXCLUDED_PROGRAMS)) " in \
-		*" $$cmd "*)	;; \
-		*) echo "removed but $$how: $$cmd" ;; \
-		esac; \
-	done ) | sort
 
 ### Make sure built-ins do not have dups and listed in git.c
 #
@@ -3836,17 +3833,28 @@
 #
 # An example command to build against libFuzzer from LLVM 11.0.0:
 #
-# make CC=clang CXX=clang++ \
+# make CC=clang FUZZ_CXX=clang++ \
 #      CFLAGS="-fsanitize=fuzzer-no-link,address" \
-#      LIB_FUZZING_ENGINE="-fsanitize=fuzzer" \
+#      LIB_FUZZING_ENGINE="-fsanitize=fuzzer,address" \
 #      fuzz-all
 #
-FUZZ_CXXFLAGS ?= $(CFLAGS)
+FUZZ_CXX ?= $(CC)
+FUZZ_CXXFLAGS ?= $(ALL_CFLAGS)
 
 .PHONY: fuzz-all
-
-$(FUZZ_PROGRAMS): all
-	$(QUIET_LINK)$(CXX) $(FUZZ_CXXFLAGS) $(LIB_OBJS) $(BUILTIN_OBJS) \
-		$(XDIFF_OBJS) $(EXTLIBS) git.o $@.o $(LIB_FUZZING_ENGINE) -o $@
-
 fuzz-all: $(FUZZ_PROGRAMS)
+
+$(FUZZ_PROGRAMS): %: %.o oss-fuzz/dummy-cmd-main.o $(GITLIBS) GIT-LDFLAGS
+	$(QUIET_LINK)$(FUZZ_CXX) $(FUZZ_CXXFLAGS) -o $@ $(ALL_LDFLAGS) \
+		-Wl,--allow-multiple-definition \
+		$(filter %.o,$^) $(filter %.a,$^) $(LIBS) $(LIB_FUZZING_ENGINE)
+
+$(UNIT_TEST_PROGS): $(UNIT_TEST_BIN)/%$X: $(UNIT_TEST_DIR)/%.o $(UNIT_TEST_DIR)/test-lib.o $(GITLIBS) GIT-LDFLAGS
+	$(call mkdir_p_parent_template)
+	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) \
+		$(filter %.o,$^) $(filter %.a,$^) $(LIBS)
+
+.PHONY: build-unit-tests unit-tests
+build-unit-tests: $(UNIT_TEST_PROGS)
+unit-tests: $(UNIT_TEST_PROGS) t/helper/test-tool$X
+	$(MAKE) -C t/ unit-tests
diff --git a/RelNotes b/RelNotes
index 1abe69c..cc696fc 120000
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/2.43.5.txt
\ No newline at end of file
+Documentation/RelNotes/2.46.0.txt
\ No newline at end of file
diff --git a/add-interactive.c b/add-interactive.c
index 6bf87e7..b5d6cd6 100644
--- a/add-interactive.c
+++ b/add-interactive.c
@@ -532,8 +532,9 @@ static int get_modified_files(struct repository *r,
 			      size_t *binary_count)
 {
 	struct object_id head_oid;
-	int is_initial = !resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-					     &head_oid, NULL);
+	int is_initial = !refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+						  "HEAD", RESOLVE_REF_READING,
+						  &head_oid, NULL);
 	struct collection_status s = { 0 };
 	int i;
 
@@ -761,8 +762,10 @@ static int run_revert(struct add_i_state *s, const struct pathspec *ps,
 	size_t count, i, j;
 
 	struct object_id oid;
-	int is_initial = !resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &oid,
-					     NULL);
+	int is_initial = !refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+						  "HEAD", RESOLVE_REF_READING,
+						  &oid,
+						  NULL);
 	struct lock_file index_lock;
 	const char **paths;
 	struct tree *tree;
@@ -865,6 +868,7 @@ static int get_untracked_files(struct repository *r,
 	}
 
 	strbuf_release(&buf);
+	dir_clear(&dir);
 	return 0;
 }
 
@@ -989,8 +993,10 @@ static int run_diff(struct add_i_state *s, const struct pathspec *ps,
 	ssize_t count, i;
 
 	struct object_id oid;
-	int is_initial = !resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &oid,
-					     NULL);
+	int is_initial = !refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+						  "HEAD", RESOLVE_REF_READING,
+						  &oid,
+						  NULL);
 	if (get_modified_files(s->r, INDEX_ONLY, files, ps, NULL, NULL) < 0)
 		return -1;
 
diff --git a/add-patch.c b/add-patch.c
index 79eda16..d8ea05f 100644
--- a/add-patch.c
+++ b/add-patch.c
@@ -293,13 +293,13 @@ static void err(struct add_p_state *s, const char *fmt, ...)
 	va_list args;
 
 	va_start(args, fmt);
-	fputs(s->s.error_color, stderr);
-	vfprintf(stderr, fmt, args);
-	fputs(s->s.reset_color, stderr);
-	fputc('\n', stderr);
+	fputs(s->s.error_color, stdout);
+	vprintf(fmt, args);
+	puts(s->s.reset_color);
 	va_end(args);
 }
 
+LAST_ARG_MUST_BE_NULL
 static void setup_child_process(struct add_p_state *s,
 				struct child_process *cp, ...)
 {
@@ -1105,26 +1105,26 @@ static int edit_hunk_manually(struct add_p_state *s, struct hunk *hunk)
 	size_t i;
 
 	strbuf_reset(&s->buf);
-	strbuf_commented_addf(&s->buf, comment_line_char,
+	strbuf_commented_addf(&s->buf, comment_line_str,
 			      _("Manual hunk edit mode -- see bottom for "
 				"a quick guide.\n"));
 	render_hunk(s, hunk, 0, 0, &s->buf);
-	strbuf_commented_addf(&s->buf, comment_line_char,
+	strbuf_commented_addf(&s->buf, comment_line_str,
 			      _("---\n"
 				"To remove '%c' lines, make them ' ' lines "
 				"(context).\n"
 				"To remove '%c' lines, delete them.\n"
-				"Lines starting with %c will be removed.\n"),
+				"Lines starting with %s will be removed.\n"),
 			      s->mode->is_reverse ? '+' : '-',
 			      s->mode->is_reverse ? '-' : '+',
-			      comment_line_char);
-	strbuf_commented_addf(&s->buf, comment_line_char, "%s",
+			      comment_line_str);
+	strbuf_commented_addf(&s->buf, comment_line_str, "%s",
 			      _(s->mode->edit_hunk_hint));
 	/*
 	 * TRANSLATORS: 'it' refers to the patch mentioned in the previous
 	 * messages.
 	 */
-	strbuf_commented_addf(&s->buf, comment_line_char,
+	strbuf_commented_addf(&s->buf, comment_line_str,
 			      _("If it does not apply cleanly, you will be "
 				"given an opportunity to\n"
 				"edit again.  If all lines of the hunk are "
@@ -1139,7 +1139,7 @@ static int edit_hunk_manually(struct add_p_state *s, struct hunk *hunk)
 	for (i = 0; i < s->buf.len; ) {
 		size_t next = find_next_line(&s->buf, i);
 
-		if (s->buf.buf[i] != comment_line_char)
+		if (!starts_with(s->buf.buf + i, comment_line_str))
 			strbuf_add(&s->plain, s->buf.buf + i, next - i);
 		i = next;
 	}
@@ -1228,6 +1228,7 @@ static int prompt_yesno(struct add_p_state *s, const char *prompt)
 		fflush(stdout);
 		if (read_single_character(s) == EOF)
 			return -1;
+		/* do not limit to 1-byte input to allow 'no' etc. */
 		switch (tolower(s->answer.buf[0])) {
 		case 'n': return 0;
 		case 'y': return 1;
@@ -1326,7 +1327,7 @@ static int apply_for_checkout(struct add_p_state *s, struct strbuf *diff,
 		err(s, _("Nothing was applied.\n"));
 	} else
 		/* As a last resort, show the diff to the user */
-		fwrite(diff->buf, diff->len, 1, stderr);
+		fwrite(diff->buf, diff->len, 1, stdout);
 
 	return 0;
 }
@@ -1388,13 +1389,14 @@ N_("j - leave this hunk undecided, see next undecided hunk\n"
    "/ - search for a hunk matching the given regex\n"
    "s - split the current hunk into smaller hunks\n"
    "e - manually edit the current hunk\n"
+   "p - print the current hunk\n"
    "? - print help\n");
 
 static int patch_update_file(struct add_p_state *s,
 			     struct file_diff *file_diff)
 {
 	size_t hunk_index = 0;
-	ssize_t i, undecided_previous, undecided_next;
+	ssize_t i, undecided_previous, undecided_next, rendered_hunk_index = -1;
 	struct hunk *hunk;
 	char ch;
 	struct child_process cp = CHILD_PROCESS_INIT;
@@ -1447,8 +1449,11 @@ static int patch_update_file(struct add_p_state *s,
 
 		strbuf_reset(&s->buf);
 		if (file_diff->hunk_nr) {
-			render_hunk(s, hunk, 0, colored, &s->buf);
-			fputs(s->buf.buf, stdout);
+			if (rendered_hunk_index != hunk_index) {
+				render_hunk(s, hunk, 0, colored, &s->buf);
+				fputs(s->buf.buf, stdout);
+				rendered_hunk_index = hunk_index;
+			}
 
 			strbuf_reset(&s->buf);
 			if (undecided_previous >= 0) {
@@ -1480,6 +1485,7 @@ static int patch_update_file(struct add_p_state *s,
 				permitted |= ALLOW_EDIT;
 				strbuf_addstr(&s->buf, ",e");
 			}
+			strbuf_addstr(&s->buf, ",p");
 		}
 		if (file_diff->deleted)
 			prompt_mode_type = PROMPT_DELETION;
@@ -1506,6 +1512,12 @@ static int patch_update_file(struct add_p_state *s,
 		if (!s->answer.len)
 			continue;
 		ch = tolower(s->answer.buf[0]);
+
+		/* 'g' takes a hunk number and '/' takes a regexp */
+		if (s->answer.len != 1 && (ch != 'g' && ch != '/')) {
+			err(s, _("Only one letter is expected, got '%s'"), s->answer.buf);
+			continue;
+		}
 		if (ch == 'y') {
 			hunk->use = USE_HUNK;
 soft_increment:
@@ -1641,16 +1653,19 @@ static int patch_update_file(struct add_p_state *s,
 				err(s, _("No hunk matches the given pattern"));
 				break;
 			}
+			regfree(&regex);
 			hunk_index = i;
 		} else if (s->answer.buf[0] == 's') {
 			size_t splittable_into = hunk->splittable_into;
-			if (!(permitted & ALLOW_SPLIT))
+			if (!(permitted & ALLOW_SPLIT)) {
 				err(s, _("Sorry, cannot split this hunk"));
-			else if (!split_hunk(s, file_diff,
-					     hunk - file_diff->hunk))
+			} else if (!split_hunk(s, file_diff,
+					     hunk - file_diff->hunk)) {
 				color_fprintf_ln(stdout, s->s.header_color,
 						 _("Split into %d hunks."),
 						 (int)splittable_into);
+				rendered_hunk_index = -1;
+			}
 		} else if (s->answer.buf[0] == 'e') {
 			if (!(permitted & ALLOW_EDIT))
 				err(s, _("Sorry, cannot edit this hunk"));
@@ -1658,7 +1673,9 @@ static int patch_update_file(struct add_p_state *s,
 				hunk->use = USE_HUNK;
 				goto soft_increment;
 			}
-		} else {
+		} else if (s->answer.buf[0] == 'p') {
+			rendered_hunk_index = -1;
+		} else if (s->answer.buf[0] == '?') {
 			const char *p = _(help_patch_remainder), *eol = p;
 
 			color_fprintf(stdout, s->s.help_color, "%s",
@@ -1682,6 +1699,9 @@ static int patch_update_file(struct add_p_state *s,
 				color_fprintf_ln(stdout, s->s.help_color,
 						 "%.*s", (int)(eol - p), p);
 			}
+		} else {
+			err(s, _("Unknown command '%s' (use '?' for help)"),
+			    s->answer.buf);
 		}
 	}
 
@@ -1729,14 +1749,6 @@ int run_add_p(struct repository *r, enum add_p_mode mode,
 	if (mode == ADD_P_STASH)
 		s.mode = &patch_mode_stash;
 	else if (mode == ADD_P_RESET) {
-		/*
-		 * NEEDSWORK: Instead of comparing to the literal "HEAD",
-		 * compare the commit objects instead so that other ways of
-		 * saying the same thing (such as "@") are also handled
-		 * appropriately.
-		 *
-		 * This applies to the cases below too.
-		 */
 		if (!revision || !strcmp(revision, "HEAD"))
 			s.mode = &patch_mode_reset_head;
 		else
@@ -1776,9 +1788,9 @@ int run_add_p(struct repository *r, enum add_p_mode mode,
 			break;
 
 	if (s.file_diff_nr == 0)
-		fprintf(stderr, _("No changes.\n"));
+		err(&s, _("No changes."));
 	else if (binary_count == s.file_diff_nr)
-		fprintf(stderr, _("Only binary files changed.\n"));
+		err(&s, _("Only binary files changed."));
 
 	add_p_state_clear(&s);
 	return 0;
diff --git a/advice.c b/advice.c
index 50c7944..0a122c2 100644
--- a/advice.c
+++ b/advice.c
@@ -2,6 +2,7 @@
 #include "advice.h"
 #include "config.h"
 #include "color.h"
+#include "environment.h"
 #include "gettext.h"
 #include "help.h"
 #include "string-list.h"
@@ -33,52 +34,59 @@ static const char *advise_get_color(enum color_advice ix)
 	return "";
 }
 
+enum advice_level {
+	ADVICE_LEVEL_NONE = 0,
+	ADVICE_LEVEL_DISABLED,
+	ADVICE_LEVEL_ENABLED,
+};
+
 static struct {
 	const char *key;
-	int enabled;
+	enum advice_level level;
 } advice_setting[] = {
-	[ADVICE_ADD_EMBEDDED_REPO]			= { "addEmbeddedRepo", 1 },
-	[ADVICE_ADD_EMPTY_PATHSPEC]			= { "addEmptyPathspec", 1 },
-	[ADVICE_ADD_IGNORED_FILE]			= { "addIgnoredFile", 1 },
-	[ADVICE_AM_WORK_DIR] 				= { "amWorkDir", 1 },
-	[ADVICE_AMBIGUOUS_FETCH_REFSPEC]		= { "ambiguousFetchRefspec", 1 },
-	[ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME] 	= { "checkoutAmbiguousRemoteBranchName", 1 },
-	[ADVICE_COMMIT_BEFORE_MERGE]			= { "commitBeforeMerge", 1 },
-	[ADVICE_DETACHED_HEAD]				= { "detachedHead", 1 },
-	[ADVICE_SUGGEST_DETACHING_HEAD]			= { "suggestDetachingHead", 1 },
-	[ADVICE_DIVERGING]				= { "diverging", 1 },
-	[ADVICE_FETCH_SHOW_FORCED_UPDATES]		= { "fetchShowForcedUpdates", 1 },
-	[ADVICE_GRAFT_FILE_DEPRECATED]			= { "graftFileDeprecated", 1 },
-	[ADVICE_IGNORED_HOOK]				= { "ignoredHook", 1 },
-	[ADVICE_IMPLICIT_IDENTITY]			= { "implicitIdentity", 1 },
-	[ADVICE_NESTED_TAG]				= { "nestedTag", 1 },
-	[ADVICE_OBJECT_NAME_WARNING]			= { "objectNameWarning", 1 },
-	[ADVICE_PUSH_ALREADY_EXISTS]			= { "pushAlreadyExists", 1 },
-	[ADVICE_PUSH_FETCH_FIRST]			= { "pushFetchFirst", 1 },
-	[ADVICE_PUSH_NEEDS_FORCE]			= { "pushNeedsForce", 1 },
-	[ADVICE_PUSH_REF_NEEDS_UPDATE]			= { "pushRefNeedsUpdate", 1 },
-
-	/* make this an alias for backward compatibility */
-	[ADVICE_PUSH_UPDATE_REJECTED_ALIAS]		= { "pushNonFastForward", 1 },
-
-	[ADVICE_PUSH_NON_FF_CURRENT]			= { "pushNonFFCurrent", 1 },
-	[ADVICE_PUSH_NON_FF_MATCHING]			= { "pushNonFFMatching", 1 },
-	[ADVICE_PUSH_UNQUALIFIED_REF_NAME]		= { "pushUnqualifiedRefName", 1 },
-	[ADVICE_PUSH_UPDATE_REJECTED]			= { "pushUpdateRejected", 1 },
-	[ADVICE_RESET_NO_REFRESH_WARNING]		= { "resetNoRefresh", 1 },
-	[ADVICE_RESOLVE_CONFLICT]			= { "resolveConflict", 1 },
-	[ADVICE_RM_HINTS]				= { "rmHints", 1 },
-	[ADVICE_SEQUENCER_IN_USE]			= { "sequencerInUse", 1 },
-	[ADVICE_SET_UPSTREAM_FAILURE]			= { "setUpstreamFailure", 1 },
-	[ADVICE_SKIPPED_CHERRY_PICKS]			= { "skippedCherryPicks", 1 },
-	[ADVICE_STATUS_AHEAD_BEHIND_WARNING]		= { "statusAheadBehindWarning", 1 },
-	[ADVICE_STATUS_HINTS]				= { "statusHints", 1 },
-	[ADVICE_STATUS_U_OPTION]			= { "statusUoption", 1 },
-	[ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE] = { "submoduleAlternateErrorStrategyDie", 1 },
-	[ADVICE_SUBMODULES_NOT_UPDATED] 		= { "submodulesNotUpdated", 1 },
-	[ADVICE_UPDATE_SPARSE_PATH]			= { "updateSparsePath", 1 },
-	[ADVICE_WAITING_FOR_EDITOR]			= { "waitingForEditor", 1 },
-	[ADVICE_WORKTREE_ADD_ORPHAN]			= { "worktreeAddOrphan", 1 },
+	[ADVICE_ADD_EMBEDDED_REPO]			= { "addEmbeddedRepo" },
+	[ADVICE_ADD_EMPTY_PATHSPEC]			= { "addEmptyPathspec" },
+	[ADVICE_ADD_IGNORED_FILE]			= { "addIgnoredFile" },
+	[ADVICE_AMBIGUOUS_FETCH_REFSPEC]		= { "ambiguousFetchRefspec" },
+	[ADVICE_AM_WORK_DIR] 				= { "amWorkDir" },
+	[ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME] 	= { "checkoutAmbiguousRemoteBranchName" },
+	[ADVICE_COMMIT_BEFORE_MERGE]			= { "commitBeforeMerge" },
+	[ADVICE_DETACHED_HEAD]				= { "detachedHead" },
+	[ADVICE_DIVERGING]				= { "diverging" },
+	[ADVICE_FETCH_SHOW_FORCED_UPDATES]		= { "fetchShowForcedUpdates" },
+	[ADVICE_FORCE_DELETE_BRANCH]			= { "forceDeleteBranch" },
+	[ADVICE_GRAFT_FILE_DEPRECATED]			= { "graftFileDeprecated" },
+	[ADVICE_IGNORED_HOOK]				= { "ignoredHook" },
+	[ADVICE_IMPLICIT_IDENTITY]			= { "implicitIdentity" },
+	[ADVICE_MERGE_CONFLICT]				= { "mergeConflict" },
+	[ADVICE_NESTED_TAG]				= { "nestedTag" },
+	[ADVICE_OBJECT_NAME_WARNING]			= { "objectNameWarning" },
+	[ADVICE_PUSH_ALREADY_EXISTS]			= { "pushAlreadyExists" },
+	[ADVICE_PUSH_FETCH_FIRST]			= { "pushFetchFirst" },
+	[ADVICE_PUSH_NEEDS_FORCE]			= { "pushNeedsForce" },
+	[ADVICE_PUSH_NON_FF_CURRENT]			= { "pushNonFFCurrent" },
+	[ADVICE_PUSH_NON_FF_MATCHING]			= { "pushNonFFMatching" },
+	[ADVICE_PUSH_REF_NEEDS_UPDATE]			= { "pushRefNeedsUpdate" },
+	[ADVICE_PUSH_UNQUALIFIED_REF_NAME]		= { "pushUnqualifiedRefName" },
+	[ADVICE_PUSH_UPDATE_REJECTED]			= { "pushUpdateRejected" },
+	[ADVICE_PUSH_UPDATE_REJECTED_ALIAS]		= { "pushNonFastForward" }, /* backwards compatibility */
+	[ADVICE_REF_SYNTAX]				= { "refSyntax" },
+	[ADVICE_RESET_NO_REFRESH_WARNING]		= { "resetNoRefresh" },
+	[ADVICE_RESOLVE_CONFLICT]			= { "resolveConflict" },
+	[ADVICE_RM_HINTS]				= { "rmHints" },
+	[ADVICE_SEQUENCER_IN_USE]			= { "sequencerInUse" },
+	[ADVICE_SET_UPSTREAM_FAILURE]			= { "setUpstreamFailure" },
+	[ADVICE_SKIPPED_CHERRY_PICKS]			= { "skippedCherryPicks" },
+	[ADVICE_STATUS_AHEAD_BEHIND_WARNING]		= { "statusAheadBehindWarning" },
+	[ADVICE_STATUS_HINTS]				= { "statusHints" },
+	[ADVICE_STATUS_U_OPTION]			= { "statusUoption" },
+	[ADVICE_SUBMODULES_NOT_UPDATED] 		= { "submodulesNotUpdated" },
+	[ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE] = { "submoduleAlternateErrorStrategyDie" },
+	[ADVICE_SUBMODULE_MERGE_CONFLICT]               = { "submoduleMergeConflict" },
+	[ADVICE_SUGGEST_DETACHING_HEAD]			= { "suggestDetachingHead" },
+	[ADVICE_UPDATE_SPARSE_PATH]			= { "updateSparsePath" },
+	[ADVICE_WAITING_FOR_EDITOR]			= { "waitingForEditor" },
+	[ADVICE_WORKTREE_ADD_ORPHAN]			= { "worktreeAddOrphan" },
 };
 
 static const char turn_off_instructions[] =
@@ -98,8 +106,9 @@ static void vadvise(const char *advice, int display_instructions,
 
 	for (cp = buf.buf; *cp; cp = np) {
 		np = strchrnul(cp, '\n');
-		fprintf(stderr,	_("%shint: %.*s%s\n"),
+		fprintf(stderr,	_("%shint:%s%.*s%s\n"),
 			advise_get_color(ADVICE_COLOR_HINT),
+			(np == cp) ? "" : " ",
 			(int)(np - cp), cp,
 			advise_get_color(ADVICE_COLOR_RESET));
 		if (*np)
@@ -118,13 +127,19 @@ void advise(const char *advice, ...)
 
 int advice_enabled(enum advice_type type)
 {
-	switch(type) {
-	case ADVICE_PUSH_UPDATE_REJECTED:
-		return advice_setting[ADVICE_PUSH_UPDATE_REJECTED].enabled &&
-		       advice_setting[ADVICE_PUSH_UPDATE_REJECTED_ALIAS].enabled;
-	default:
-		return advice_setting[type].enabled;
-	}
+	int enabled = advice_setting[type].level != ADVICE_LEVEL_DISABLED;
+	static int globally_enabled = -1;
+
+	if (globally_enabled < 0)
+		globally_enabled = git_env_bool(GIT_ADVICE_ENVIRONMENT, 1);
+	if (!globally_enabled)
+		return 0;
+
+	if (type == ADVICE_PUSH_UPDATE_REJECTED)
+		return enabled &&
+		       advice_enabled(ADVICE_PUSH_UPDATE_REJECTED_ALIAS);
+
+	return enabled;
 }
 
 void advise_if_enabled(enum advice_type type, const char *advice, ...)
@@ -135,7 +150,8 @@ void advise_if_enabled(enum advice_type type, const char *advice, ...)
 		return;
 
 	va_start(params, advice);
-	vadvise(advice, 1, advice_setting[type].key, params);
+	vadvise(advice, !advice_setting[type].level, advice_setting[type].key,
+		params);
 	va_end(params);
 }
 
@@ -164,7 +180,9 @@ int git_default_advice_config(const char *var, const char *value)
 	for (i = 0; i < ARRAY_SIZE(advice_setting); i++) {
 		if (strcasecmp(k, advice_setting[i].key))
 			continue;
-		advice_setting[i].enabled = git_config_bool(var, value);
+		advice_setting[i].level = git_config_bool(var, value)
+					  ? ADVICE_LEVEL_ENABLED
+					  : ADVICE_LEVEL_DISABLED;
 		return 0;
 	}
 
diff --git a/advice.h b/advice.h
index 2affbe1..c8d29f9 100644
--- a/advice.h
+++ b/advice.h
@@ -10,21 +10,22 @@ struct string_list;
  * Add the new config variable to Documentation/config/advice.txt.
  * Call advise_if_enabled to print your advice.
  */
- enum advice_type {
+enum advice_type {
 	ADVICE_ADD_EMBEDDED_REPO,
 	ADVICE_ADD_EMPTY_PATHSPEC,
 	ADVICE_ADD_IGNORED_FILE,
-	ADVICE_AM_WORK_DIR,
 	ADVICE_AMBIGUOUS_FETCH_REFSPEC,
+	ADVICE_AM_WORK_DIR,
 	ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME,
 	ADVICE_COMMIT_BEFORE_MERGE,
 	ADVICE_DETACHED_HEAD,
 	ADVICE_DIVERGING,
-	ADVICE_SUGGEST_DETACHING_HEAD,
 	ADVICE_FETCH_SHOW_FORCED_UPDATES,
+	ADVICE_FORCE_DELETE_BRANCH,
 	ADVICE_GRAFT_FILE_DEPRECATED,
 	ADVICE_IGNORED_HOOK,
 	ADVICE_IMPLICIT_IDENTITY,
+	ADVICE_MERGE_CONFLICT,
 	ADVICE_NESTED_TAG,
 	ADVICE_OBJECT_NAME_WARNING,
 	ADVICE_PUSH_ALREADY_EXISTS,
@@ -32,23 +33,26 @@ struct string_list;
 	ADVICE_PUSH_NEEDS_FORCE,
 	ADVICE_PUSH_NON_FF_CURRENT,
 	ADVICE_PUSH_NON_FF_MATCHING,
-	ADVICE_PUSH_UNQUALIFIED_REF_NAME,
-	ADVICE_PUSH_UPDATE_REJECTED_ALIAS,
-	ADVICE_PUSH_UPDATE_REJECTED,
 	ADVICE_PUSH_REF_NEEDS_UPDATE,
+	ADVICE_PUSH_UNQUALIFIED_REF_NAME,
+	ADVICE_PUSH_UPDATE_REJECTED,
+	ADVICE_PUSH_UPDATE_REJECTED_ALIAS,
+	ADVICE_REF_SYNTAX,
 	ADVICE_RESET_NO_REFRESH_WARNING,
 	ADVICE_RESOLVE_CONFLICT,
 	ADVICE_RM_HINTS,
 	ADVICE_SEQUENCER_IN_USE,
 	ADVICE_SET_UPSTREAM_FAILURE,
+	ADVICE_SKIPPED_CHERRY_PICKS,
 	ADVICE_STATUS_AHEAD_BEHIND_WARNING,
 	ADVICE_STATUS_HINTS,
 	ADVICE_STATUS_U_OPTION,
-	ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE,
 	ADVICE_SUBMODULES_NOT_UPDATED,
+	ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE,
+	ADVICE_SUBMODULE_MERGE_CONFLICT,
+	ADVICE_SUGGEST_DETACHING_HEAD,
 	ADVICE_UPDATE_SPARSE_PATH,
 	ADVICE_WAITING_FOR_EDITOR,
-	ADVICE_SKIPPED_CHERRY_PICKS,
 	ADVICE_WORKTREE_ADD_ORPHAN,
 };
 
diff --git a/alias.c b/alias.c
index 5a238f2..4daafd9 100644
--- a/alias.c
+++ b/alias.c
@@ -21,9 +21,11 @@ static int config_alias_cb(const char *key, const char *value,
 		return 0;
 
 	if (data->alias) {
-		if (!strcasecmp(p, data->alias))
-			return git_config_string((const char **)&data->v,
+		if (!strcasecmp(p, data->alias)) {
+			FREE_AND_NULL(data->v);
+			return git_config_string(&data->v,
 						 key, value);
+		}
 	} else if (data->list) {
 		string_list_append(data->list, p);
 	}
diff --git a/apply.c b/apply.c
index 7608e33..901b67e 100644
--- a/apply.c
+++ b/apply.c
@@ -77,7 +77,8 @@ static int parse_whitespace_option(struct apply_state *state, const char *option
 		return 0;
 	}
 	/*
-	 * Please update $__git_whitespacelist in git-completion.bash
+	 * Please update $__git_whitespacelist in git-completion.bash,
+	 * Documentation/git-apply.txt, and Documentation/git-am.txt
 	 * when you add new options.
 	 */
 	return error(_("unrecognized whitespace option '%s'"), option);
@@ -1291,8 +1292,15 @@ static char *git_header_name(int p_value,
 				return NULL; /* no postimage name */
 			second = skip_tree_prefix(p_value, name + len + 1,
 						  line_len - (len + 1));
+			/*
+			 * If we are at the SP at the end of a directory,
+			 * skip_tree_prefix() may return NULL as that makes
+			 * it appears as if we have an absolute path.
+			 * Keep going to find another SP.
+			 */
 			if (!second)
-				return NULL;
+				continue;
+
 			/*
 			 * Does len bytes starting at "name" and "second"
 			 * (that are separated by one HT or SP we just
@@ -2219,7 +2227,8 @@ static void reverse_patches(struct patch *p)
 		struct fragment *frag = p->fragments;
 
 		SWAP(p->new_name, p->old_name);
-		SWAP(p->new_mode, p->old_mode);
+		if (p->new_mode)
+			SWAP(p->new_mode, p->old_mode);
 		SWAP(p->is_new, p->is_delete);
 		SWAP(p->lines_added, p->lines_deleted);
 		SWAP(p->old_oid_prefix, p->new_oid_prefix);
@@ -3703,8 +3712,10 @@ static int apply_data(struct apply_state *state, struct patch *patch,
 			fprintf(stderr, _("Falling back to direct application...\n"));
 
 		/* Note: with --reject, apply_fragments() returns 0 */
-		if (patch->direct_to_threeway || apply_fragments(state, &image, patch) < 0)
+		if (patch->direct_to_threeway || apply_fragments(state, &image, patch) < 0) {
+			clear_image(&image);
 			return -1;
+		}
 	}
 	patch->result = image.buf;
 	patch->resultsize = image.len;
@@ -3777,8 +3788,17 @@ static int check_preimage(struct apply_state *state,
 		return error_errno("%s", old_name);
 	}
 
-	if (!state->cached && !previous)
-		st_mode = ce_mode_from_stat(*ce, st->st_mode);
+	if (!state->cached && !previous) {
+		if (*ce && !(*ce)->ce_mode)
+			BUG("ce_mode == 0 for path '%s'", old_name);
+
+		if (trust_executable_bit)
+			st_mode = ce_mode_from_stat(*ce, st->st_mode);
+		else if (*ce)
+			st_mode = (*ce)->ce_mode;
+		else
+			st_mode = patch->old_mode;
+	}
 
 	if (patch->is_new < 0)
 		patch->is_new = 0;
@@ -4430,6 +4450,7 @@ static int create_one_file(struct apply_state *state,
 			   const char *buf,
 			   unsigned long size)
 {
+	char *newpath = NULL;
 	int res;
 
 	if (state->cached)
@@ -4491,24 +4512,26 @@ static int create_one_file(struct apply_state *state,
 		unsigned int nr = getpid();
 
 		for (;;) {
-			char newpath[PATH_MAX];
-			mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
+			newpath = mkpathdup("%s~%u", path, nr);
 			res = try_create_file(state, newpath, mode, buf, size);
 			if (res < 0)
-				return -1;
+				goto out;
 			if (!res) {
 				if (!rename(newpath, path))
-					return 0;
+					goto out;
 				unlink_or_warn(newpath);
 				break;
 			}
 			if (errno != EEXIST)
 				break;
 			++nr;
+			FREE_AND_NULL(newpath);
 		}
 	}
-	return error_errno(_("unable to write file '%s' mode %o"),
-			   path, mode);
+	res = error_errno(_("unable to write file '%s' mode %o"), path, mode);
+out:
+	free(newpath);
+	return res;
 }
 
 static int add_conflicted_stages_file(struct apply_state *state,
@@ -4591,7 +4614,7 @@ static int write_out_one_result(struct apply_state *state,
 static int write_out_one_reject(struct apply_state *state, struct patch *patch)
 {
 	FILE *rej;
-	char namebuf[PATH_MAX];
+	char *namebuf;
 	struct fragment *frag;
 	int fd, cnt = 0;
 	struct strbuf sb = STRBUF_INIT;
@@ -4624,28 +4647,30 @@ static int write_out_one_reject(struct apply_state *state, struct patch *patch)
 		say_patch_name(stderr, sb.buf, patch);
 	strbuf_release(&sb);
 
-	cnt = strlen(patch->new_name);
-	if (ARRAY_SIZE(namebuf) <= cnt + 5) {
-		cnt = ARRAY_SIZE(namebuf) - 5;
-		warning(_("truncating .rej filename to %.*s.rej"),
-			cnt - 1, patch->new_name);
-	}
-	memcpy(namebuf, patch->new_name, cnt);
-	memcpy(namebuf + cnt, ".rej", 5);
+	namebuf = xstrfmt("%s.rej", patch->new_name);
 
 	fd = open(namebuf, O_CREAT | O_EXCL | O_WRONLY, 0666);
 	if (fd < 0) {
-		if (errno != EEXIST)
-			return error_errno(_("cannot open %s"), namebuf);
-		if (unlink(namebuf))
-			return error_errno(_("cannot unlink '%s'"), namebuf);
+		if (errno != EEXIST) {
+			error_errno(_("cannot open %s"), namebuf);
+			goto error;
+		}
+		if (unlink(namebuf)) {
+			error_errno(_("cannot unlink '%s'"), namebuf);
+			goto error;
+		}
 		fd = open(namebuf, O_CREAT | O_EXCL | O_WRONLY, 0666);
-		if (fd < 0)
-			return error_errno(_("cannot open %s"), namebuf);
+		if (fd < 0) {
+			error_errno(_("cannot open %s"), namebuf);
+			goto error;
+		}
 	}
 	rej = fdopen(fd, "w");
-	if (!rej)
-		return error_errno(_("cannot open %s"), namebuf);
+	if (!rej) {
+		error_errno(_("cannot open %s"), namebuf);
+		close(fd);
+		goto error;
+	}
 
 	/* Normal git tools never deal with .rej, so do not pretend
 	 * this is a git patch by saying --git or giving extended
@@ -4669,6 +4694,8 @@ static int write_out_one_reject(struct apply_state *state, struct patch *patch)
 			fputc('\n', rej);
 	}
 	fclose(rej);
+error:
+	free(namebuf);
 	return -1;
 }
 
diff --git a/archive-tar.c b/archive-tar.c
index f2a0ed7..8ae3012 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -365,7 +365,7 @@ static struct archiver *find_tar_filter(const char *name, size_t len)
 	int i;
 	for (i = 0; i < nr_tar_filters; i++) {
 		struct archiver *ar = tar_filters[i];
-		if (!strncmp(ar->name, name, len) && !ar->name[len])
+		if (!xstrncmpz(ar->name, name, len))
 			return ar;
 	}
 	return NULL;
diff --git a/archive.c b/archive.c
index a6730be..5287fcd 100644
--- a/archive.c
+++ b/archive.c
@@ -339,7 +339,8 @@ int write_archive_entries(struct archiver_args *args,
 		opts.src_index = args->repo->index;
 		opts.dst_index = args->repo->index;
 		opts.fn = oneway_merge;
-		init_tree_desc(&t, args->tree->buffer, args->tree->size);
+		init_tree_desc(&t, &args->tree->object.oid,
+			       args->tree->buffer, args->tree->size);
 		if (unpack_trees(1, &t, &opts))
 			return -1;
 		git_attr_set_direction(GIT_ATTR_INDEX);
diff --git a/attr.c b/attr.c
index e62876d..300f994 100644
--- a/attr.c
+++ b/attr.c
@@ -17,6 +17,7 @@
 #include "utf8.h"
 #include "quote.h"
 #include "read-cache-ll.h"
+#include "refs.h"
 #include "revision.h"
 #include "object-store-ll.h"
 #include "setup.h"
@@ -24,7 +25,7 @@
 #include "tree-walk.h"
 #include "object-name.h"
 
-const char *git_attr_tree;
+char *git_attr_tree;
 
 const char git_attr__true[] = "(builtin)true";
 const char git_attr__false[] = "\0(builtin)false";
@@ -183,6 +184,15 @@ static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check)
 	}
 }
 
+/*
+ * Atribute name cannot begin with "builtin_" which
+ * is a reserved namespace for built in attributes values.
+ */
+static int attr_name_reserved(const char *name)
+{
+	return starts_with(name, "builtin_");
+}
+
 static int attr_name_valid(const char *name, size_t namelen)
 {
 	/*
@@ -315,7 +325,7 @@ static const char *parse_attr(const char *src, int lineno, const char *cp,
 			cp++;
 			len--;
 		}
-		if (!attr_name_valid(cp, len)) {
+		if (!attr_name_valid(cp, len) || attr_name_reserved(cp)) {
 			report_invalid_attr(cp, len, src, lineno);
 			return NULL;
 		}
@@ -379,7 +389,7 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
 		name += strlen(ATTRIBUTE_MACRO_PREFIX);
 		name += strspn(name, blank);
 		namelen = strcspn(name, blank);
-		if (!attr_name_valid(name, namelen)) {
+		if (!attr_name_valid(name, namelen) || attr_name_reserved(name)) {
 			report_invalid_attr(name, namelen, src, lineno);
 			goto fail_return;
 		}
@@ -755,8 +765,8 @@ static struct attr_stack *read_attr_from_file(const char *path, unsigned flags)
 	return res;
 }
 
-static struct attr_stack *read_attr_from_buf(char *buf, const char *path,
-					     unsigned flags)
+static struct attr_stack *read_attr_from_buf(char *buf, size_t length,
+					     const char *path, unsigned flags)
 {
 	struct attr_stack *res;
 	char *sp;
@@ -764,6 +774,11 @@ static struct attr_stack *read_attr_from_buf(char *buf, const char *path,
 
 	if (!buf)
 		return NULL;
+	if (length >= ATTR_MAX_FILE_SIZE) {
+		warning(_("ignoring overly large gitattributes blob '%s'"), path);
+		free(buf);
+		return NULL;
+	}
 
 	CALLOC_ARRAY(res, 1);
 	for (sp = buf; *sp;) {
@@ -803,7 +818,7 @@ static struct attr_stack *read_attr_from_blob(struct index_state *istate,
 		return NULL;
 	}
 
-	return read_attr_from_buf(buf, path, flags);
+	return read_attr_from_buf(buf, sz, path, flags);
 }
 
 static struct attr_stack *read_attr_from_index(struct index_state *istate,
@@ -850,13 +865,7 @@ static struct attr_stack *read_attr_from_index(struct index_state *istate,
 		stack = read_attr_from_blob(istate, &istate->cache[sparse_dir_pos]->oid, relative_path, flags);
 	} else {
 		buf = read_blob_data_from_index(istate, path, &size);
-		if (!buf)
-			return NULL;
-		if (size >= ATTR_MAX_FILE_SIZE) {
-			warning(_("ignoring overly large gitattributes blob '%s'"), path);
-			return NULL;
-		}
-		stack = read_attr_from_buf(buf, path, flags);
+		stack = read_attr_from_buf(buf, size, path, flags);
 	}
 	return stack;
 }
@@ -1196,15 +1205,16 @@ static void collect_some_attrs(struct index_state *istate,
 }
 
 static const char *default_attr_source_tree_object_name;
-static int ignore_bad_attr_tree;
 
 void set_git_attr_source(const char *tree_object_name)
 {
 	default_attr_source_tree_object_name = xstrdup(tree_object_name);
 }
 
-static void compute_default_attr_source(struct object_id *attr_source)
+static int compute_default_attr_source(struct object_id *attr_source)
 {
+	int ignore_bad_attr_tree = 0;
+
 	if (!default_attr_source_tree_object_name)
 		default_attr_source_tree_object_name = getenv(GIT_ATTR_SOURCE_ENVIRONMENT);
 
@@ -1213,33 +1223,118 @@ static void compute_default_attr_source(struct object_id *attr_source)
 		ignore_bad_attr_tree = 1;
 	}
 
-	if (!default_attr_source_tree_object_name &&
-	    startup_info->have_repository &&
-	    is_bare_repository()) {
-		default_attr_source_tree_object_name = "HEAD";
-		ignore_bad_attr_tree = 1;
-	}
+	if (!default_attr_source_tree_object_name)
+		return 0;
 
-	if (!default_attr_source_tree_object_name || !is_null_oid(attr_source))
-		return;
+	if (!startup_info->have_repository) {
+		if (!ignore_bad_attr_tree)
+			die(_("cannot use --attr-source or GIT_ATTR_SOURCE without repo"));
+		return 0;
+	}
 
 	if (repo_get_oid_treeish(the_repository,
 				 default_attr_source_tree_object_name,
-				 attr_source) && !ignore_bad_attr_tree)
-		die(_("bad --attr-source or GIT_ATTR_SOURCE"));
+				 attr_source)) {
+		if (!ignore_bad_attr_tree)
+			die(_("bad --attr-source or GIT_ATTR_SOURCE"));
+		return 0;
+	}
+
+	return 1;
 }
 
 static struct object_id *default_attr_source(void)
 {
 	static struct object_id attr_source;
+	static int has_attr_source = -1;
 
-	if (is_null_oid(&attr_source))
-		compute_default_attr_source(&attr_source);
-	if (is_null_oid(&attr_source))
+	if (has_attr_source < 0)
+		has_attr_source = compute_default_attr_source(&attr_source);
+	if (!has_attr_source)
 		return NULL;
 	return &attr_source;
 }
 
+static const char *interned_mode_string(unsigned int mode)
+{
+	static struct {
+		unsigned int val;
+		char str[7];
+	} mode_string[] = {
+		{ .val = 0040000 },
+		{ .val = 0100644 },
+		{ .val = 0100755 },
+		{ .val = 0120000 },
+		{ .val = 0160000 },
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mode_string); i++) {
+		if (mode_string[i].val != mode)
+			continue;
+		if (!*mode_string[i].str)
+			snprintf(mode_string[i].str, sizeof(mode_string[i].str),
+				 "%06o", mode);
+		return mode_string[i].str;
+	}
+	BUG("Unsupported mode 0%o", mode);
+}
+
+static const char *builtin_object_mode_attr(struct index_state *istate, const char *path)
+{
+	unsigned int mode;
+
+	if (direction == GIT_ATTR_CHECKIN) {
+		struct object_id oid;
+		struct stat st;
+		if (lstat(path, &st))
+			die_errno(_("unable to stat '%s'"), path);
+		mode = canon_mode(st.st_mode);
+		if (S_ISDIR(mode)) {
+			/*
+			 *`path` is either a directory or it is a submodule,
+			 * in which case it is already indexed as submodule
+			 * or it does not exist in the index yet and we need to
+			 * check if we can resolve to a ref.
+			*/
+			int pos = index_name_pos(istate, path, strlen(path));
+			if (pos >= 0) {
+				 if (S_ISGITLINK(istate->cache[pos]->ce_mode))
+					 mode = istate->cache[pos]->ce_mode;
+			} else if (repo_resolve_gitlink_ref(the_repository, path,
+							    "HEAD", &oid) == 0) {
+				mode = S_IFGITLINK;
+			}
+		}
+	} else {
+		/*
+		 * For GIT_ATTR_CHECKOUT and GIT_ATTR_INDEX we only check
+		 * for mode in the index.
+		 */
+		int pos = index_name_pos(istate, path, strlen(path));
+		if (pos >= 0)
+			mode = istate->cache[pos]->ce_mode;
+		else
+			return ATTR__UNSET;
+	}
+
+	return interned_mode_string(mode);
+}
+
+
+static const char *compute_builtin_attr(struct index_state *istate,
+					  const char *path,
+					  const struct git_attr *attr) {
+	static const struct git_attr *object_mode_attr;
+
+	if (!object_mode_attr)
+		object_mode_attr = git_attr("builtin_objectmode");
+
+	if (attr == object_mode_attr)
+		return builtin_object_mode_attr(istate, path);
+	return ATTR__UNSET;
+}
+
 void git_check_attr(struct index_state *istate,
 		    const char *path,
 		    struct attr_check *check)
@@ -1253,7 +1348,7 @@ void git_check_attr(struct index_state *istate,
 		unsigned int n = check->items[i].attr->attr_nr;
 		const char *value = check->all_attrs[n].value;
 		if (value == ATTR__UNKNOWN)
-			value = ATTR__UNSET;
+			value = compute_builtin_attr(istate, path, check->all_attrs[n].attr);
 		check->items[i].value = value;
 	}
 }
diff --git a/attr.h b/attr.h
index 127998a..bb33b60 100644
--- a/attr.h
+++ b/attr.h
@@ -190,6 +190,8 @@ struct attr_check {
 };
 
 struct attr_check *attr_check_alloc(void);
+
+LAST_ARG_MUST_BE_NULL
 struct attr_check *attr_check_initl(const char *, ...);
 struct attr_check *attr_check_dup(const struct attr_check *check);
 
@@ -236,6 +238,6 @@ const char *git_attr_global_file(void);
 /* Return whether the system gitattributes file is enabled and should be used. */
 int git_attr_system_is_enabled(void);
 
-extern const char *git_attr_tree;
+extern char *git_attr_tree;
 
 #endif /* ATTR_H */
diff --git a/bisect.c b/bisect.c
index 8487f8c..4ea703b 100644
--- a/bisect.c
+++ b/bisect.c
@@ -158,6 +158,9 @@ static void show_list(const char *debug, int counted, int nr,
 		const char *subject_start;
 		int subject_len;
 
+		if (!buf)
+			die(_("unable to read %s"), oid_to_hex(&commit->object.oid));
+
 		fprintf(stderr, "%c%c%c ",
 			(commit_flags & TREESAME) ? ' ' : 'T',
 			(commit_flags & UNINTERESTING) ? 'U' : ' ',
@@ -466,11 +469,11 @@ static int register_ref(const char *refname, const struct object_id *oid,
 
 static int read_bisect_refs(void)
 {
-	return for_each_ref_in("refs/bisect/", register_ref, NULL);
+	return refs_for_each_ref_in(get_main_ref_store(the_repository),
+				    "refs/bisect/", register_ref, NULL);
 }
 
 static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
-static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
 static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
 static GIT_PATH_FUNC(git_path_bisect_run, "BISECT_RUN")
 static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START")
@@ -706,26 +709,10 @@ static enum bisect_error error_if_skipped_commits(struct commit_list *tried,
 
 static int is_expected_rev(const struct object_id *oid)
 {
-	const char *filename = git_path_bisect_expected_rev();
-	struct stat st;
-	struct strbuf str = STRBUF_INIT;
-	FILE *fp;
-	int res = 0;
-
-	if (stat(filename, &st) || !S_ISREG(st.st_mode))
+	struct object_id expected_oid;
+	if (refs_read_ref(get_main_ref_store(the_repository), "BISECT_EXPECTED_REV", &expected_oid))
 		return 0;
-
-	fp = fopen_or_warn(filename, "r");
-	if (!fp)
-		return 0;
-
-	if (strbuf_getline_lf(&str, fp) != EOF)
-		res = !strcmp(str.buf, oid_to_hex(oid));
-
-	strbuf_release(&str);
-	fclose(fp);
-
-	return res;
+	return oideq(oid, &expected_oid);
 }
 
 enum bisect_error bisect_checkout(const struct object_id *bisect_rev,
@@ -735,11 +722,14 @@ enum bisect_error bisect_checkout(const struct object_id *bisect_rev,
 	struct pretty_print_context pp = {0};
 	struct strbuf commit_msg = STRBUF_INIT;
 
-	update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
+	refs_update_ref(get_main_ref_store(the_repository), NULL,
+			"BISECT_EXPECTED_REV", bisect_rev, NULL, 0,
+			UPDATE_REFS_DIE_ON_ERR);
 
 	if (no_checkout) {
-		update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0,
-			   UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository), NULL,
+				"BISECT_HEAD", bisect_rev, NULL, 0,
+				UPDATE_REFS_DIE_ON_ERR);
 	} else {
 		struct child_process cmd = CHILD_PROCESS_INIT;
 
@@ -850,10 +840,11 @@ static void handle_skipped_merge_base(const struct object_id *mb)
 static enum bisect_error check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
 {
 	enum bisect_error res = BISECT_OK;
-	struct commit_list *result;
+	struct commit_list *result = NULL;
 
-	result = repo_get_merge_bases_many(the_repository, rev[0], rev_nr - 1,
-					   rev + 1);
+	if (repo_get_merge_bases_many(the_repository, rev[0], rev_nr - 1,
+				      rev + 1, &result) < 0)
+		exit(128);
 
 	for (; result; result = result->next) {
 		const struct object_id *mb = &result->item->object.oid;
@@ -959,23 +950,32 @@ static enum bisect_error check_good_are_ancestors_of_bad(struct repository *r,
 }
 
 /*
- * This does "git diff-tree --pretty COMMIT" without one fork+exec.
+ * Display a commit summary to the user.
  */
-static void show_diff_tree(struct repository *r,
-			   const char *prefix,
-			   struct commit *commit)
+static void show_commit(struct commit *commit)
 {
-	const char *argv[] = {
-		"diff-tree", "--pretty", "--stat", "--summary", "--cc", NULL
-	};
-	struct rev_info opt;
+	struct child_process show = CHILD_PROCESS_INIT;
 
-	git_config(git_diff_ui_config, NULL);
-	repo_init_revisions(r, &opt, prefix);
-
-	setup_revisions(ARRAY_SIZE(argv) - 1, argv, &opt, NULL);
-	log_tree_commit(&opt, commit);
-	release_revisions(&opt);
+	/*
+	 * Call git show with --no-pager, as it would otherwise
+	 * paginate the "git show" output only, not the output
+	 * from bisect_next_all(); this can be fixed by moving
+	 * it into a --format parameter, but that would override
+	 * the user's default options for "git show", which we
+	 * are trying to honour.
+	 */
+	strvec_pushl(&show.args,
+		     "--no-pager",
+		     "show",
+		     "--stat",
+		     "--summary",
+		     "--no-abbrev-commit",
+		     "--diff-merges=first-parent",
+		     oid_to_hex(&commit->object.oid), NULL);
+	show.git_cmd = 1;
+	if (run_command(&show))
+		die(_("unable to start 'show' for object '%s'"),
+		    oid_to_hex(&commit->object.oid));
 }
 
 /*
@@ -1031,7 +1031,8 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 	 * If no_checkout is non-zero, the bisection process does not
 	 * checkout the trial commit but instead simply updates BISECT_HEAD.
 	 */
-	int no_checkout = ref_exists("BISECT_HEAD");
+	int no_checkout = refs_ref_exists(get_main_ref_store(the_repository),
+					  "BISECT_HEAD");
 	unsigned bisect_flags = 0;
 
 	read_bisect_terms(&term_bad, &term_good);
@@ -1092,7 +1093,7 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 		printf("%s is the first %s commit\n", oid_to_hex(bisect_rev),
 			term_bad);
 
-		show_diff_tree(r, prefix, revs.commits->item);
+		show_commit(revs.commits->item);
 		/*
 		 * This means the bisection process succeeded.
 		 * Using BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND (-10)
@@ -1182,12 +1183,16 @@ int bisect_clean_state(void)
 
 	/* There may be some refs packed during bisection */
 	struct string_list refs_for_removal = STRING_LIST_INIT_NODUP;
-	for_each_ref_in("refs/bisect", mark_for_removal, (void *) &refs_for_removal);
+	refs_for_each_ref_in(get_main_ref_store(the_repository),
+			     "refs/bisect", mark_for_removal,
+			     (void *) &refs_for_removal);
 	string_list_append(&refs_for_removal, xstrdup("BISECT_HEAD"));
-	result = delete_refs("bisect: remove", &refs_for_removal, REF_NO_DEREF);
+	string_list_append(&refs_for_removal, xstrdup("BISECT_EXPECTED_REV"));
+	result = refs_delete_refs(get_main_ref_store(the_repository),
+				  "bisect: remove", &refs_for_removal,
+				  REF_NO_DEREF);
 	refs_for_removal.strdup_strings = 1;
 	string_list_clear(&refs_for_removal, 0);
-	unlink_or_warn(git_path_bisect_expected_rev());
 	unlink_or_warn(git_path_bisect_ancestors_ok());
 	unlink_or_warn(git_path_bisect_log());
 	unlink_or_warn(git_path_bisect_names());
diff --git a/blame.c b/blame.c
index 1a16d4e..33586b9 100644
--- a/blame.c
+++ b/blame.c
@@ -2700,7 +2700,7 @@ static struct commit *dwim_reverse_initial(struct rev_info *revs,
 		return NULL;
 
 	/* Do we have HEAD? */
-	if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
+	if (!refs_resolve_ref_unsafe(get_main_ref_store(the_repository), "HEAD", RESOLVE_REF_READING, &head_oid, NULL))
 		return NULL;
 	head_commit = lookup_commit_reference_gently(revs->repo,
 						     &head_oid, 1);
@@ -2803,7 +2803,7 @@ void setup_scoreboard(struct blame_scoreboard *sb,
 		if (sb->final) {
 			parent_oid = &sb->final->object.oid;
 		} else {
-			if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
+			if (!refs_resolve_ref_unsafe(get_main_ref_store(the_repository), "HEAD", RESOLVE_REF_READING, &head_oid, NULL))
 				die("no such ref: HEAD");
 			parent_oid = &head_oid;
 		}
diff --git a/branch.c b/branch.c
index 534594f..df5d24f 100644
--- a/branch.c
+++ b/branch.c
@@ -370,10 +370,14 @@ int read_branch_desc(struct strbuf *buf, const char *branch_name)
  */
 int validate_branchname(const char *name, struct strbuf *ref)
 {
-	if (strbuf_check_branch_ref(ref, name))
-		die(_("'%s' is not a valid branch name"), name);
+	if (strbuf_check_branch_ref(ref, name)) {
+		int code = die_message(_("'%s' is not a valid branch name"), name);
+		advise_if_enabled(ADVICE_REF_SYNTAX,
+				  _("See `man git check-ref-format`"));
+		exit(code);
+	}
 
-	return ref_exists(ref->buf);
+	return refs_ref_exists(get_main_ref_store(the_repository), ref->buf);
 }
 
 static int initialized_checked_out_branches;
@@ -619,11 +623,12 @@ void create_branch(struct repository *r,
 		msg = xstrfmt("branch: Reset to %s", start_name);
 	else
 		msg = xstrfmt("branch: Created from %s", start_name);
-	transaction = ref_transaction_begin(&err);
+	transaction = ref_store_transaction_begin(get_main_ref_store(the_repository),
+						  &err);
 	if (!transaction ||
 		ref_transaction_update(transaction, ref.buf,
 					&oid, forcing ? NULL : null_oid(),
-					0, msg, &err) ||
+					NULL, NULL, 0, msg, &err) ||
 		ref_transaction_commit(transaction, &err))
 		die("%s", err.buf);
 	ref_transaction_free(transaction);
@@ -734,7 +739,7 @@ static int submodule_create_branch(struct repository *r,
 }
 
 void create_branches_recursively(struct repository *r, const char *name,
-				 const char *start_commitish,
+				 const char *start_committish,
 				 const char *tracking_name, int force,
 				 int reflog, int quiet, enum branch_track track,
 				 int dry_run)
@@ -744,8 +749,8 @@ void create_branches_recursively(struct repository *r, const char *name,
 	struct object_id super_oid;
 	struct submodule_entry_list submodule_entry_list;
 
-	/* Perform dwim on start_commitish to get super_oid and branch_point. */
-	dwim_branch_start(r, start_commitish, BRANCH_TRACK_NEVER,
+	/* Perform dwim on start_committish to get super_oid and branch_point. */
+	dwim_branch_start(r, start_committish, BRANCH_TRACK_NEVER,
 			  &branch_point, &super_oid);
 
 	/*
@@ -768,7 +773,7 @@ void create_branches_recursively(struct repository *r, const char *name,
 				submodule_entry_list.entries[i].submodule->name);
 			if (advice_enabled(ADVICE_SUBMODULES_NOT_UPDATED))
 				advise(_("You may try updating the submodules using 'git checkout --no-recurse-submodules %s && git submodule update --init'"),
-				       start_commitish);
+				       start_committish);
 			exit(code);
 		}
 
@@ -783,7 +788,7 @@ void create_branches_recursively(struct repository *r, const char *name,
 			    name);
 	}
 
-	create_branch(r, name, start_commitish, force, 0, reflog, quiet,
+	create_branch(r, name, start_committish, force, 0, reflog, quiet,
 		      BRANCH_TRACK_NEVER, dry_run);
 	if (dry_run)
 		return;
@@ -817,8 +822,9 @@ void remove_merge_branch_state(struct repository *r)
 	unlink(git_path_merge_rr(r));
 	unlink(git_path_merge_msg(r));
 	unlink(git_path_merge_mode(r));
-	unlink(git_path_auto_merge(r));
-	save_autostash(git_path_merge_autostash(r));
+	refs_delete_ref(get_main_ref_store(r), "", "AUTO_MERGE",
+			NULL, REF_NO_DEREF);
+	save_autostash_ref(r, "MERGE_AUTOSTASH");
 }
 
 void remove_branch_state(struct repository *r, int verbose)
diff --git a/branch.h b/branch.h
index 30c01ae..ec2f35f 100644
--- a/branch.h
+++ b/branch.h
@@ -78,26 +78,26 @@ void create_branch(struct repository *r,
  * those of create_branch() except for start_name, which is represented
  * by two different parameters:
  *
- * - start_commitish is the commit-ish, in repository r, that determines
+ * - start_committish is the commit-ish, in repository r, that determines
  *   which commits the branches will point to. The superproject branch
- *   will point to the commit of start_commitish and the submodule
- *   branches will point to the gitlink commit oids in start_commitish's
+ *   will point to the commit of start_committish and the submodule
+ *   branches will point to the gitlink commit oids in start_committish's
  *   tree.
  *
  * - tracking_name is the name of the ref, in repository r, that will be
  *   used to set up tracking information. This value is propagated to
  *   all submodules, which will evaluate the ref using their own ref
- *   stores. If NULL, this defaults to start_commitish.
+ *   stores. If NULL, this defaults to start_committish.
  *
- * When this function is called on the superproject, start_commitish
+ * When this function is called on the superproject, start_committish
  * can be any user-provided ref and tracking_name can be NULL (similar
  * to create_branches()). But when recursing through submodules,
- * start_commitish is the plain gitlink commit oid. Since the oid cannot
+ * start_committish is the plain gitlink commit oid. Since the oid cannot
  * be used for tracking information, tracking_name is propagated and
  * used for tracking instead.
  */
 void create_branches_recursively(struct repository *r, const char *name,
-				 const char *start_commitish,
+				 const char *start_committish,
 				 const char *tracking_name, int force,
 				 int reflog, int quiet, enum branch_track track,
 				 int dry_run);
diff --git a/builtin.h b/builtin.h
index d560baa..7eda9b2 100644
--- a/builtin.h
+++ b/builtin.h
@@ -207,10 +207,12 @@ int cmd_rebase(int argc, const char **argv, const char *prefix);
 int cmd_rebase__interactive(int argc, const char **argv, const char *prefix);
 int cmd_receive_pack(int argc, const char **argv, const char *prefix);
 int cmd_reflog(int argc, const char **argv, const char *prefix);
+int cmd_refs(int argc, const char **argv, const char *prefix);
 int cmd_remote(int argc, const char **argv, const char *prefix);
 int cmd_remote_ext(int argc, const char **argv, const char *prefix);
 int cmd_remote_fd(int argc, const char **argv, const char *prefix);
 int cmd_repack(int argc, const char **argv, const char *prefix);
+int cmd_replay(int argc, const char **argv, const char *prefix);
 int cmd_rerere(int argc, const char **argv, const char *prefix);
 int cmd_reset(int argc, const char **argv, const char *prefix);
 int cmd_restore(int argc, const char **argv, const char *prefix);
diff --git a/builtin/add.c b/builtin/add.c
index 2151c45..3dfcfc5 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2006 Linus Torvalds
  */
-#define USE_THE_INDEX_VARIABLE
+
 #include "builtin.h"
 #include "advice.h"
 #include "config.h"
@@ -40,20 +40,20 @@ static int chmod_pathspec(struct pathspec *pathspec, char flip, int show_only)
 {
 	int i, ret = 0;
 
-	for (i = 0; i < the_index.cache_nr; i++) {
-		struct cache_entry *ce = the_index.cache[i];
+	for (i = 0; i < the_repository->index->cache_nr; i++) {
+		struct cache_entry *ce = the_repository->index->cache[i];
 		int err;
 
 		if (!include_sparse &&
 		    (ce_skip_worktree(ce) ||
-		     !path_in_sparse_checkout(ce->name, &the_index)))
+		     !path_in_sparse_checkout(ce->name, the_repository->index)))
 			continue;
 
-		if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
+		if (pathspec && !ce_path_match(the_repository->index, ce, pathspec, NULL))
 			continue;
 
 		if (!show_only)
-			err = chmod_index_entry(&the_index, ce, flip);
+			err = chmod_index_entry(the_repository->index, ce, flip);
 		else
 			err = S_ISREG(ce->ce_mode) ? 0 : -1;
 
@@ -68,20 +68,20 @@ static int renormalize_tracked_files(const struct pathspec *pathspec, int flags)
 {
 	int i, retval = 0;
 
-	for (i = 0; i < the_index.cache_nr; i++) {
-		struct cache_entry *ce = the_index.cache[i];
+	for (i = 0; i < the_repository->index->cache_nr; i++) {
+		struct cache_entry *ce = the_repository->index->cache[i];
 
 		if (!include_sparse &&
 		    (ce_skip_worktree(ce) ||
-		     !path_in_sparse_checkout(ce->name, &the_index)))
+		     !path_in_sparse_checkout(ce->name, the_repository->index)))
 			continue;
 		if (ce_stage(ce))
 			continue; /* do not touch unmerged paths */
 		if (!S_ISREG(ce->ce_mode) && !S_ISLNK(ce->ce_mode))
 			continue; /* do not touch non blobs */
-		if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
+		if (pathspec && !ce_path_match(the_repository->index, ce, pathspec, NULL))
 			continue;
-		retval |= add_file_to_index(&the_index, ce->name,
+		retval |= add_file_to_index(the_repository->index, ce->name,
 					    flags | ADD_CACHE_RENORMALIZE);
 	}
 
@@ -100,11 +100,11 @@ static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
 	i = dir->nr;
 	while (--i >= 0) {
 		struct dir_entry *entry = *src++;
-		if (dir_path_match(&the_index, entry, pathspec, prefix, seen))
+		if (dir_path_match(the_repository->index, entry, pathspec, prefix, seen))
 			*dst++ = entry;
 	}
 	dir->nr = dst - dir->entries;
-	add_pathspec_matches_against_index(pathspec, &the_index, seen,
+	add_pathspec_matches_against_index(pathspec, the_repository->index, seen,
 					   PS_IGNORE_SKIP_WORKTREE);
 	return seen;
 }
@@ -115,18 +115,18 @@ static int refresh(int verbose, const struct pathspec *pathspec)
 	int i, ret = 0;
 	char *skip_worktree_seen = NULL;
 	struct string_list only_match_skip_worktree = STRING_LIST_INIT_NODUP;
-	int flags = REFRESH_IGNORE_SKIP_WORKTREE |
+	unsigned int flags = REFRESH_IGNORE_SKIP_WORKTREE |
 		    (verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET);
 
 	seen = xcalloc(pathspec->nr, 1);
-	refresh_index(&the_index, flags, pathspec, seen,
+	refresh_index(the_repository->index, flags, pathspec, seen,
 		      _("Unstaged changes after refreshing the index:"));
 	for (i = 0; i < pathspec->nr; i++) {
 		if (!seen[i]) {
 			const char *path = pathspec->items[i].original;
 
 			if (matches_skip_worktree(pathspec, i, &skip_worktree_seen) ||
-			    !path_in_sparse_checkout(path, &the_index)) {
+			    !path_in_sparse_checkout(path, the_repository->index)) {
 				string_list_append(&only_match_skip_worktree,
 						   pathspec->items[i].original);
 			} else {
@@ -150,7 +150,7 @@ static int refresh(int verbose, const struct pathspec *pathspec)
 int interactive_add(const char **argv, const char *prefix, int patch)
 {
 	struct pathspec pathspec;
-	int unused;
+	int unused, ret;
 
 	if (!git_config_get_bool("add.interactive.usebuiltin", &unused))
 		warning(_("the add.interactive.useBuiltin setting has been removed!\n"
@@ -163,9 +163,12 @@ int interactive_add(const char **argv, const char *prefix, int patch)
 		       prefix, argv);
 
 	if (patch)
-		return !!run_add_p(the_repository, ADD_P_ADD, NULL, &pathspec);
+		ret = !!run_add_p(the_repository, ADD_P_ADD, NULL, &pathspec);
 	else
-		return !!run_add_i(the_repository, &pathspec);
+		ret = !!run_add_i(the_repository, &pathspec);
+
+	clear_pathspec(&pathspec);
+	return ret;
 }
 
 static int edit_patch(int argc, const char **argv, const char *prefix)
@@ -310,9 +313,9 @@ static void check_embedded_repo(const char *path)
 	strbuf_strip_suffix(&name, "/");
 
 	warning(_("adding embedded git repository: %s"), name.buf);
-	if (!adviced_on_embedded_repo &&
-	    advice_enabled(ADVICE_ADD_EMBEDDED_REPO)) {
-		advise(embedded_advice, name.buf, name.buf);
+	if (!adviced_on_embedded_repo) {
+		advise_if_enabled(ADVICE_ADD_EMBEDDED_REPO,
+				  embedded_advice, name.buf, name.buf);
 		adviced_on_embedded_repo = 1;
 	}
 
@@ -328,21 +331,19 @@ static int add_files(struct dir_struct *dir, int flags)
 		fprintf(stderr, _(ignore_error));
 		for (i = 0; i < dir->ignored_nr; i++)
 			fprintf(stderr, "%s\n", dir->ignored[i]->name);
-		if (advice_enabled(ADVICE_ADD_IGNORED_FILE))
-			advise(_("Use -f if you really want to add them.\n"
-				"Turn this message off by running\n"
-				"\"git config advice.addIgnoredFile false\""));
+		advise_if_enabled(ADVICE_ADD_IGNORED_FILE,
+				  _("Use -f if you really want to add them."));
 		exit_status = 1;
 	}
 
 	for (i = 0; i < dir->nr; i++) {
 		if (!include_sparse &&
-		    !path_in_sparse_checkout(dir->entries[i]->name, &the_index)) {
+		    !path_in_sparse_checkout(dir->entries[i]->name, the_repository->index)) {
 			string_list_append(&matched_sparse_paths,
 					   dir->entries[i]->name);
 			continue;
 		}
-		if (add_file_to_index(&the_index, dir->entries[i]->name, flags)) {
+		if (add_file_to_index(the_repository->index, dir->entries[i]->name, flags)) {
 			if (!ignore_add_errors)
 				die(_("adding files failed"));
 			exit_status = 1;
@@ -370,6 +371,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	int add_new_files;
 	int require_pathspec;
 	char *seen = NULL;
+	char *ps_matched = NULL;
 	struct lock_file lock_file = LOCK_INIT;
 
 	git_config(add_config, NULL);
@@ -421,7 +423,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	 * Check the "pathspec '%s' did not match any files" block
 	 * below before enabling new magic.
 	 */
-	parse_pathspec(&pathspec, PATHSPEC_ATTR,
+	parse_pathspec(&pathspec, 0,
 		       PATHSPEC_PREFER_FULL |
 		       PATHSPEC_SYMLINK_LEADING_PATH,
 		       prefix, argv);
@@ -430,7 +432,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		if (pathspec.nr)
 			die(_("'%s' and pathspec arguments cannot be used together"), "--pathspec-from-file");
 
-		parse_pathspec_file(&pathspec, PATHSPEC_ATTR,
+		parse_pathspec_file(&pathspec, 0,
 				    PATHSPEC_PREFER_FULL |
 				    PATHSPEC_SYMLINK_LEADING_PATH,
 				    prefix, pathspec_from_file, pathspec_file_nul);
@@ -440,10 +442,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	if (require_pathspec && pathspec.nr == 0) {
 		fprintf(stderr, _("Nothing specified, nothing added.\n"));
-		if (advice_enabled(ADVICE_ADD_EMPTY_PATHSPEC))
-			advise( _("Maybe you wanted to say 'git add .'?\n"
-				"Turn this message off by running\n"
-				"\"git config advice.addEmptyPathspec false\""));
+		advise_if_enabled(ADVICE_ADD_EMPTY_PATHSPEC,
+				  _("Maybe you wanted to say 'git add .'?"));
 		return 0;
 	}
 
@@ -461,8 +461,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	if (repo_read_index_preload(the_repository, &pathspec, 0) < 0)
 		die(_("index file corrupt"));
 
-	die_in_unpopulated_submodule(&the_index, prefix);
-	die_path_inside_submodule(&the_index, &pathspec);
+	die_in_unpopulated_submodule(the_repository->index, prefix);
+	die_path_inside_submodule(the_repository->index, &pathspec);
 
 	if (add_new_files) {
 		int baselen;
@@ -474,7 +474,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		}
 
 		/* This picks up the paths that are not tracked */
-		baselen = fill_directory(&dir, &the_index, &pathspec);
+		baselen = fill_directory(&dir, the_repository->index, &pathspec);
 		if (pathspec.nr)
 			seen = prune_directory(&dir, &pathspec, baselen);
 	}
@@ -491,7 +491,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 		if (!seen)
 			seen = find_pathspecs_matching_against_index(&pathspec,
-					&the_index, PS_IGNORE_SKIP_WORKTREE);
+					the_repository->index, PS_IGNORE_SKIP_WORKTREE);
 
 		/*
 		 * file_exists() assumes exact match
@@ -501,7 +501,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			       PATHSPEC_LITERAL |
 			       PATHSPEC_GLOB |
 			       PATHSPEC_ICASE |
-			       PATHSPEC_EXCLUDE);
+			       PATHSPEC_EXCLUDE |
+			       PATHSPEC_ATTR);
 
 		for (i = 0; i < pathspec.nr; i++) {
 			const char *path = pathspec.items[i].match;
@@ -526,8 +527,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			    !file_exists(path)) {
 				if (ignore_missing) {
 					int dtype = DT_UNKNOWN;
-					if (is_excluded(&dir, &the_index, path, &dtype))
-						dir_add_ignored(&dir, &the_index,
+					if (is_excluded(&dir, the_repository->index, path, &dtype))
+						dir_add_ignored(&dir, the_repository->index,
 								path, pathspec.items[i].len);
 				} else
 					die(_("pathspec '%s' did not match any files"),
@@ -548,12 +549,17 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	begin_odb_transaction();
 
+	ps_matched = xcalloc(pathspec.nr, 1);
 	if (add_renormalize)
 		exit_status |= renormalize_tracked_files(&pathspec, flags);
 	else
 		exit_status |= add_files_to_cache(the_repository, prefix,
-						  &pathspec, include_sparse,
-						  flags);
+						  &pathspec, ps_matched,
+						  include_sparse, flags);
+
+	if (take_worktree_changes && !add_renormalize && !ignore_add_errors &&
+	    report_path_error(ps_matched, &pathspec))
+		exit(128);
 
 	if (add_new_files)
 		exit_status |= add_files(&dir, flags);
@@ -563,10 +569,11 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	end_odb_transaction();
 
 finish:
-	if (write_locked_index(&the_index, &lock_file,
+	if (write_locked_index(the_repository->index, &lock_file,
 			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
 		die(_("unable to write new index file"));
 
+	free(ps_matched);
 	dir_clear(&dir);
 	clear_pathspec(&pathspec);
 	return exit_status;
diff --git a/builtin/am.c b/builtin/am.c
index 43ccd9e..9265926 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -3,7 +3,7 @@
  *
  * Based on git-am.sh by Junio C Hamano.
  */
-#define USE_THE_INDEX_VARIABLE
+
 #include "builtin.h"
 #include "abspath.h"
 #include "advice.h"
@@ -1001,7 +1001,8 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
 
 	if (mkdir(state->dir, 0777) < 0 && errno != EEXIST)
 		die_errno(_("failed to create directory '%s'"), state->dir);
-	delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
+	refs_delete_ref(get_main_ref_store(the_repository), NULL,
+			"REBASE_HEAD", NULL, REF_NO_DEREF);
 
 	if (split_mail(state, patch_format, paths, keep_cr) < 0) {
 		am_destroy(state);
@@ -1081,12 +1082,15 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
 	if (!repo_get_oid(the_repository, "HEAD", &curr_head)) {
 		write_state_text(state, "abort-safety", oid_to_hex(&curr_head));
 		if (!state->rebasing)
-			update_ref("am", "ORIG_HEAD", &curr_head, NULL, 0,
-				   UPDATE_REFS_DIE_ON_ERR);
+			refs_update_ref(get_main_ref_store(the_repository),
+					"am", "ORIG_HEAD", &curr_head, NULL,
+					0,
+					UPDATE_REFS_DIE_ON_ERR);
 	} else {
 		write_state_text(state, "abort-safety", "");
 		if (!state->rebasing)
-			delete_ref(NULL, "ORIG_HEAD", NULL, 0);
+			refs_delete_ref(get_main_ref_store(the_repository),
+					NULL, "ORIG_HEAD", NULL, 0);
 	}
 
 	/*
@@ -1119,7 +1123,8 @@ static void am_next(struct am_state *state)
 
 	oidclr(&state->orig_commit);
 	unlink(am_path(state, "original-commit"));
-	delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
+	refs_delete_ref(get_main_ref_store(the_repository), NULL,
+			"REBASE_HEAD", NULL, REF_NO_DEREF);
 
 	if (!repo_get_oid(the_repository, "HEAD", &head))
 		write_state_text(state, "abort-safety", oid_to_hex(&head));
@@ -1150,19 +1155,23 @@ static const char *msgnum(const struct am_state *state)
 static void NORETURN die_user_resolve(const struct am_state *state)
 {
 	if (state->resolvemsg) {
-		printf_ln("%s", state->resolvemsg);
+		advise_if_enabled(ADVICE_MERGE_CONFLICT, "%s", state->resolvemsg);
 	} else {
 		const char *cmdline = state->interactive ? "git am -i" : "git am";
+		struct strbuf sb = STRBUF_INIT;
 
-		printf_ln(_("When you have resolved this problem, run \"%s --continue\"."), cmdline);
-		printf_ln(_("If you prefer to skip this patch, run \"%s --skip\" instead."), cmdline);
+		strbuf_addf(&sb, _("When you have resolved this problem, run \"%s --continue\".\n"), cmdline);
+		strbuf_addf(&sb, _("If you prefer to skip this patch, run \"%s --skip\" instead.\n"), cmdline);
 
 		if (advice_enabled(ADVICE_AM_WORK_DIR) &&
 		    is_empty_or_missing_file(am_path(state, "patch")) &&
 		    !repo_index_has_changes(the_repository, NULL, NULL))
-			printf_ln(_("To record the empty patch as an empty commit, run \"%s --allow-empty\"."), cmdline);
+			strbuf_addf(&sb, _("To record the empty patch as an empty commit, run \"%s --allow-empty\".\n"), cmdline);
 
-		printf_ln(_("To restore the original branch and stop patching, run \"%s --abort\"."), cmdline);
+		strbuf_addf(&sb, _("To restore the original branch and stop patching, run \"%s --abort\"."), cmdline);
+
+		advise_if_enabled(ADVICE_MERGE_CONFLICT, "%s", sb.buf);
+		strbuf_release(&sb);
 	}
 
 	exit(128);
@@ -1286,7 +1295,7 @@ static int parse_mail(struct am_state *state, const char *mail)
 
 	strbuf_addstr(&msg, "\n\n");
 	strbuf_addbuf(&msg, &mi.log_message);
-	strbuf_stripspace(&msg, '\0');
+	strbuf_stripspace(&msg, NULL);
 
 	assert(!state->author_name);
 	state->author_name = strbuf_detach(&author_name, NULL);
@@ -1462,8 +1471,9 @@ static int parse_mail_rebase(struct am_state *state, const char *mail)
 
 	oidcpy(&state->orig_commit, &commit_oid);
 	write_state_text(state, "original-commit", oid_to_hex(&commit_oid));
-	update_ref("am", "REBASE_HEAD", &commit_oid,
-		   NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
+	refs_update_ref(get_main_ref_store(the_repository), "am",
+			"REBASE_HEAD", &commit_oid,
+			NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
 
 	return 0;
 }
@@ -1532,8 +1542,8 @@ static int run_apply(const struct am_state *state, const char *index_file)
 
 	if (index_file) {
 		/* Reload index as apply_all_patches() will have modified it. */
-		discard_index(&the_index);
-		read_index_from(&the_index, index_file, get_git_dir());
+		discard_index(the_repository->index);
+		read_index_from(the_repository->index, index_file, get_git_dir());
 	}
 
 	return 0;
@@ -1575,10 +1585,10 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
 	if (build_fake_ancestor(state, index_path))
 		return error("could not build fake ancestor");
 
-	discard_index(&the_index);
-	read_index_from(&the_index, index_path, get_git_dir());
+	discard_index(the_repository->index);
+	read_index_from(the_repository->index, index_path, get_git_dir());
 
-	if (write_index_as_tree(&orig_tree, &the_index, index_path, 0, NULL))
+	if (write_index_as_tree(&orig_tree, the_repository->index, index_path, 0, NULL))
 		return error(_("Repository lacks necessary blobs to fall back on 3-way merge."));
 
 	say(state, stdout, _("Using index info to reconstruct a base tree..."));
@@ -1604,12 +1614,12 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
 		return error(_("Did you hand edit your patch?\n"
 				"It does not apply to blobs recorded in its index."));
 
-	if (write_index_as_tree(&their_tree, &the_index, index_path, 0, NULL))
+	if (write_index_as_tree(&their_tree, the_repository->index, index_path, 0, NULL))
 		return error("could not write tree");
 
 	say(state, stdout, _("Falling back to patching base and 3-way merge..."));
 
-	discard_index(&the_index);
+	discard_index(the_repository->index);
 	repo_read_index(the_repository);
 
 	/*
@@ -1656,7 +1666,7 @@ static void do_commit(const struct am_state *state)
 	if (!state->no_verify && run_hooks("pre-applypatch"))
 		exit(1);
 
-	if (write_index_as_tree(&tree, &the_index, get_index_file(), 0, NULL))
+	if (write_index_as_tree(&tree, the_repository->index, get_index_file(), 0, NULL))
 		die(_("git write-tree failed to write a tree"));
 
 	if (!repo_get_oid_commit(the_repository, "HEAD", &parent)) {
@@ -1693,8 +1703,9 @@ static void do_commit(const struct am_state *state)
 	strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg),
 			state->msg);
 
-	update_ref(sb.buf, "HEAD", &commit, old_oid, 0,
-		   UPDATE_REFS_DIE_ON_ERR);
+	refs_update_ref(get_main_ref_store(the_repository), sb.buf, "HEAD",
+			&commit, old_oid, 0,
+			UPDATE_REFS_DIE_ON_ERR);
 
 	if (state->rebasing) {
 		FILE *fp = xfopen(am_path(state, "rewritten"), "a");
@@ -1944,7 +1955,7 @@ static void am_resolve(struct am_state *state, int allow_empty)
 		}
 	}
 
-	if (unmerged_index(&the_index)) {
+	if (unmerged_index(the_repository->index)) {
 		printf_ln(_("You still have unmerged paths in your index.\n"
 			"You should 'git add' each file with resolved conflicts to mark them as such.\n"
 			"You might run `git rm` on a file to accept \"deleted by them\" for it."));
@@ -1983,26 +1994,26 @@ static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
 
 	repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR);
 
-	refresh_index(&the_index, REFRESH_QUIET, NULL, NULL, NULL);
+	refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL);
 
 	memset(&opts, 0, sizeof(opts));
 	opts.head_idx = 1;
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
+	opts.src_index = the_repository->index;
+	opts.dst_index = the_repository->index;
 	opts.update = 1;
 	opts.merge = 1;
 	opts.reset = reset ? UNPACK_RESET_PROTECT_UNTRACKED : 0;
 	opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	opts.fn = twoway_merge;
-	init_tree_desc(&t[0], head->buffer, head->size);
-	init_tree_desc(&t[1], remote->buffer, remote->size);
+	init_tree_desc(&t[0], &head->object.oid, head->buffer, head->size);
+	init_tree_desc(&t[1], &remote->object.oid, remote->buffer, remote->size);
 
 	if (unpack_trees(2, t, &opts)) {
 		rollback_lock_file(&lock_file);
 		return -1;
 	}
 
-	if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+	if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
 	return 0;
@@ -2025,18 +2036,18 @@ static int merge_tree(struct tree *tree)
 
 	memset(&opts, 0, sizeof(opts));
 	opts.head_idx = 1;
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
+	opts.src_index = the_repository->index;
+	opts.dst_index = the_repository->index;
 	opts.merge = 1;
 	opts.fn = oneway_merge;
-	init_tree_desc(&t[0], tree->buffer, tree->size);
+	init_tree_desc(&t[0], &tree->object.oid, tree->buffer, tree->size);
 
 	if (unpack_trees(1, t, &opts)) {
 		rollback_lock_file(&lock_file);
 		return -1;
 	}
 
-	if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+	if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
 	return 0;
@@ -2064,7 +2075,7 @@ static int clean_index(const struct object_id *head, const struct object_id *rem
 	if (fast_forward_to(head_tree, head_tree, 1))
 		return -1;
 
-	if (write_index_as_tree(&index, &the_index, get_index_file(), 0, NULL))
+	if (write_index_as_tree(&index, the_repository->index, get_index_file(), 0, NULL))
 		return -1;
 
 	index_tree = parse_tree_indirect(&index);
@@ -2171,7 +2182,8 @@ static void am_abort(struct am_state *state)
 
 	am_rerere_clear();
 
-	curr_branch = resolve_refdup("HEAD", 0, &curr_head, NULL);
+	curr_branch = refs_resolve_refdup(get_main_ref_store(the_repository),
+					  "HEAD", 0, &curr_head, NULL);
 	has_curr_head = curr_branch && !is_null_oid(&curr_head);
 	if (!has_curr_head)
 		oidcpy(&curr_head, the_hash_algo->empty_tree);
@@ -2184,11 +2196,13 @@ static void am_abort(struct am_state *state)
 		die(_("failed to clean index"));
 
 	if (has_orig_head)
-		update_ref("am --abort", "HEAD", &orig_head,
-			   has_curr_head ? &curr_head : NULL, 0,
-			   UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository),
+				"am --abort", "HEAD", &orig_head,
+				has_curr_head ? &curr_head : NULL, 0,
+				UPDATE_REFS_DIE_ON_ERR);
 	else if (curr_branch)
-		delete_ref(NULL, curr_branch, NULL, REF_NO_DEREF);
+		refs_delete_ref(get_main_ref_store(the_repository), NULL,
+				curr_branch, NULL, REF_NO_DEREF);
 
 	free(curr_branch);
 	am_destroy(state);
diff --git a/builtin/apply.c b/builtin/apply.c
index 861a019..d623c52 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -1,6 +1,7 @@
 #include "builtin.h"
 #include "gettext.h"
 #include "repository.h"
+#include "hash.h"
 #include "apply.h"
 
 static const char * const apply_usage[] = {
@@ -18,6 +19,15 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
 	if (init_apply_state(&state, the_repository, prefix))
 		exit(128);
 
+	/*
+	 * We could to redo the "apply.c" machinery to make this
+	 * arbitrary fallback unnecessary, but it is dubious that it
+	 * is worth the effort.
+	 * cf. https://lore.kernel.org/git/xmqqcypfcmn4.fsf@gitster.g/
+	 */
+	if (!the_hash_algo)
+		repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
 	argc = apply_parse_options(argc, argv,
 				   &state, &force_apply, &options,
 				   apply_usage);
diff --git a/builtin/bisect.c b/builtin/bisect.c
index 032beaa..a58432b 100644
--- a/builtin/bisect.c
+++ b/builtin/bisect.c
@@ -16,7 +16,6 @@
 #include "revision.h"
 
 static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
-static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
 static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
 static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START")
 static GIT_PATH_FUNC(git_path_bisect_log, "BISECT_LOG")
@@ -244,7 +243,7 @@ static int bisect_reset(const char *commit)
 		strbuf_addstr(&branch, commit);
 	}
 
-	if (branch.len && !ref_exists("BISECT_HEAD")) {
+	if (branch.len && !refs_ref_exists(get_main_ref_store(the_repository), "BISECT_HEAD")) {
 		struct child_process cmd = CHILD_PROCESS_INIT;
 
 		cmd.git_cmd = 1;
@@ -303,8 +302,8 @@ static int bisect_write(const char *state, const char *rev,
 		goto finish;
 	}
 
-	if (update_ref(NULL, tag.buf, &oid, NULL, 0,
-		       UPDATE_REFS_MSG_ON_ERR)) {
+	if (refs_update_ref(get_main_ref_store(the_repository), NULL, tag.buf, &oid, NULL, 0,
+			    UPDATE_REFS_MSG_ON_ERR)) {
 		res = -1;
 		goto finish;
 	}
@@ -417,11 +416,12 @@ static void bisect_status(struct bisect_state *state,
 	char *bad_ref = xstrfmt("refs/bisect/%s", terms->term_bad);
 	char *good_glob = xstrfmt("%s-*", terms->term_good);
 
-	if (ref_exists(bad_ref))
+	if (refs_ref_exists(get_main_ref_store(the_repository), bad_ref))
 		state->nr_bad = 1;
 
-	for_each_glob_ref_in(inc_nr, good_glob, "refs/bisect/",
-			     (void *) &state->nr_good);
+	refs_for_each_glob_ref_in(get_main_ref_store(the_repository), inc_nr,
+				  good_glob, "refs/bisect/",
+				  (void *) &state->nr_good);
 
 	free(good_glob);
 	free(bad_ref);
@@ -575,9 +575,11 @@ static int prepare_revs(struct bisect_terms *terms, struct rev_info *revs)
 	reset_revision_walk();
 	repo_init_revisions(the_repository, revs, NULL);
 	setup_revisions(0, NULL, revs, NULL);
-	for_each_glob_ref_in(add_bisect_ref, bad, "refs/bisect/", &cb);
+	refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
+				  add_bisect_ref, bad, "refs/bisect/", &cb);
 	cb.object_flags = UNINTERESTING;
-	for_each_glob_ref_in(add_bisect_ref, good, "refs/bisect/", &cb);
+	refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
+				  add_bisect_ref, good, "refs/bisect/", &cb);
 	if (prepare_revision_walk(revs))
 		res = error(_("revision walk setup failed\n"));
 
@@ -637,7 +639,7 @@ static int bisect_successful(struct bisect_terms *terms)
 	char *bad_ref = xstrfmt("refs/bisect/%s",terms->term_bad);
 	int res;
 
-	read_ref(bad_ref, &oid);
+	refs_read_ref(get_main_ref_store(the_repository), bad_ref, &oid);
 	commit = lookup_commit_reference_by_name(bad_ref);
 	repo_format_commit_message(the_repository, commit, "%s", &commit_name,
 				   &pp);
@@ -780,7 +782,8 @@ static enum bisect_error bisect_start(struct bisect_terms *terms, int argc,
 	/*
 	 * Verify HEAD
 	 */
-	head = resolve_ref_unsafe("HEAD", 0, &head_oid, &flags);
+	head = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+				       "HEAD", 0, &head_oid, &flags);
 	if (!head)
 		if (repo_get_oid(the_repository, "HEAD", &head_oid))
 			return error(_("bad HEAD - I need a HEAD"));
@@ -839,8 +842,8 @@ static enum bisect_error bisect_start(struct bisect_terms *terms, int argc,
 			res = error(_("invalid ref: '%s'"), start_head.buf);
 			goto finish;
 		}
-		if (update_ref(NULL, "BISECT_HEAD", &oid, NULL, 0,
-			       UPDATE_REFS_MSG_ON_ERR)) {
+		if (refs_update_ref(get_main_ref_store(the_repository), NULL, "BISECT_HEAD", &oid, NULL, 0,
+				    UPDATE_REFS_MSG_ON_ERR)) {
 			res = BISECT_FAILED;
 			goto finish;
 		}
@@ -919,7 +922,6 @@ static enum bisect_error bisect_state(struct bisect_terms *terms, int argc,
 	const char *state;
 	int i, verify_expected = 1;
 	struct object_id oid, expected;
-	struct strbuf buf = STRBUF_INIT;
 	struct oid_array revs = OID_ARRAY_INIT;
 
 	if (!argc)
@@ -974,10 +976,8 @@ static enum bisect_error bisect_state(struct bisect_terms *terms, int argc,
 		oid_array_append(&revs, &commit->object.oid);
 	}
 
-	if (strbuf_read_file(&buf, git_path_bisect_expected_rev(), 0) < the_hash_algo->hexsz ||
-	    get_oid_hex(buf.buf, &expected) < 0)
+	if (refs_read_ref(get_main_ref_store(the_repository), "BISECT_EXPECTED_REV", &expected))
 		verify_expected = 0; /* Ignore invalid file contents */
-	strbuf_release(&buf);
 
 	for (i = 0; i < revs.nr; i++) {
 		if (bisect_write(state, oid_to_hex(&revs.oid[i]), terms, 0)) {
@@ -986,7 +986,9 @@ static enum bisect_error bisect_state(struct bisect_terms *terms, int argc,
 		}
 		if (verify_expected && !oideq(&revs.oid[i], &expected)) {
 			unlink_or_warn(git_path_bisect_ancestors_ok());
-			unlink_or_warn(git_path_bisect_expected_rev());
+			refs_delete_ref(get_main_ref_store(the_repository),
+					NULL, "BISECT_EXPECTED_REV", NULL,
+					REF_NO_DEREF);
 			verify_expected = 0;
 		}
 	}
@@ -1183,13 +1185,15 @@ static int verify_good(const struct bisect_terms *terms, const char *command)
 	struct object_id good_rev;
 	struct object_id current_rev;
 	char *good_glob = xstrfmt("%s-*", terms->term_good);
-	int no_checkout = ref_exists("BISECT_HEAD");
+	int no_checkout = refs_ref_exists(get_main_ref_store(the_repository),
+					  "BISECT_HEAD");
 
-	for_each_glob_ref_in(get_first_good, good_glob, "refs/bisect/",
-			     &good_rev);
+	refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
+				  get_first_good, good_glob, "refs/bisect/",
+				  &good_rev);
 	free(good_glob);
 
-	if (read_ref(no_checkout ? "BISECT_HEAD" : "HEAD", &current_rev))
+	if (refs_read_ref(get_main_ref_store(the_repository), no_checkout ? "BISECT_HEAD" : "HEAD", &current_rev))
 		return -1;
 
 	res = bisect_checkout(&good_rev, no_checkout);
diff --git a/builtin/blame.c b/builtin/blame.c
index db1f56d..e09ff01 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -316,7 +316,7 @@ static const char *format_time(timestamp_t time, const char *tz_str,
 		size_t time_width;
 		int tz;
 		tz = atoi(tz_str);
-		time_str = show_date(time, tz, &blame_date_mode);
+		time_str = show_date(time, tz, blame_date_mode);
 		strbuf_addstr(&time_buf, time_str);
 		/*
 		 * Add space paddings to time_buf to display a fixed width
@@ -718,7 +718,7 @@ static int git_blame_config(const char *var, const char *value,
 		return 0;
 	}
 	if (!strcmp(var, "blame.ignorerevsfile")) {
-		const char *str;
+		char *str;
 		int ret;
 
 		ret = git_config_pathname(&str, var, value);
@@ -915,7 +915,6 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	struct range_set ranges;
 	unsigned int range_i;
 	long anchor;
-	const int hexsz = the_hash_algo->hexsz;
 	long num_lines = 0;
 	const char *str_usage = cmd_is_annotate ? annotate_usage : blame_usage;
 	const char **opt_usage = cmd_is_annotate ? annotate_opt_usage : blame_opt_usage;
@@ -973,11 +972,11 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	} else if (show_progress < 0)
 		show_progress = isatty(2);
 
-	if (0 < abbrev && abbrev < hexsz)
+	if (0 < abbrev && abbrev < (int)the_hash_algo->hexsz)
 		/* one more abbrev length is needed for the boundary commit */
 		abbrev++;
 	else if (!abbrev)
-		abbrev = hexsz;
+		abbrev = the_hash_algo->hexsz;
 
 	if (revs_file && read_ancestry(revs_file))
 		die_errno("reading graft file '%s' failed", revs_file);
@@ -1029,7 +1028,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 		blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700");
 		break;
 	case DATE_STRFTIME:
-		blame_date_width = strlen(show_date(0, 0, &blame_date_mode)) + 1; /* add the null */
+		blame_date_width = strlen(show_date(0, 0, blame_date_mode)) + 1; /* add the null */
 		break;
 	}
 	blame_date_width -= 1; /* strip the null */
@@ -1093,8 +1092,8 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 		struct commit *head_commit;
 		struct object_id head_oid;
 
-		if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-					&head_oid, NULL) ||
+		if (!refs_resolve_ref_unsafe(get_main_ref_store(the_repository), "HEAD", RESOLVE_REF_READING,
+					     &head_oid, NULL) ||
 		    !(head_commit = lookup_commit_reference_gently(revs.repo,
 							     &head_oid, 1)))
 			die("no such ref: HEAD");
diff --git a/builtin/branch.c b/builtin/branch.c
index 6e30d5e..48cac74 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -24,6 +24,7 @@
 #include "ref-filter.h"
 #include "worktree.h"
 #include "help.h"
+#include "advice.h"
 #include "commit-reach.h"
 
 static const char * const builtin_branch_usage[] = {
@@ -42,7 +43,6 @@ static const char *head;
 static struct object_id head_oid;
 static int recurse_submodules = 0;
 static int submodule_propagate_branches = 0;
-static int omit_empty = 0;
 
 static int branch_use_color = -1;
 static char branch_colors[][COLOR_MAXLEN] = {
@@ -148,8 +148,8 @@ static int branch_merged(int kind, const char *name,
 
 		if (upstream &&
 		    (reference_name = reference_name_to_free =
-		     resolve_refdup(upstream, RESOLVE_REF_READING,
-				    &oid, NULL)) != NULL)
+		     refs_resolve_refdup(get_main_ref_store(the_repository), upstream, RESOLVE_REF_READING,
+					 &oid, NULL)) != NULL)
 			reference_rev = lookup_commit_reference(the_repository,
 								&oid);
 	}
@@ -158,6 +158,8 @@ static int branch_merged(int kind, const char *name,
 
 	merged = reference_rev ? repo_in_merge_bases(the_repository, rev,
 						     reference_rev) : 0;
+	if (merged < 0)
+		exit(128);
 
 	/*
 	 * After the safety valve is fully redefined to "check with
@@ -166,9 +168,13 @@ static int branch_merged(int kind, const char *name,
 	 * any of the following code, but during the transition period,
 	 * a gentle reminder is in order.
 	 */
-	if ((head_rev != reference_rev) &&
-	    (head_rev ? repo_in_merge_bases(the_repository, rev, head_rev) : 0) != merged) {
-		if (merged)
+	if (head_rev != reference_rev) {
+		int expect = head_rev ? repo_in_merge_bases(the_repository, rev, head_rev) : 0;
+		if (expect < 0)
+			exit(128);
+		if (expect == merged)
+			; /* okay */
+		else if (merged)
 			warning(_("deleting branch '%s' that has been merged to\n"
 				"         '%s', but not yet merged to HEAD"),
 				name, reference_name);
@@ -191,9 +197,10 @@ static int check_branch_commit(const char *branchname, const char *refname,
 		return -1;
 	}
 	if (!force && !branch_merged(kinds, branchname, rev, head_rev)) {
-		error(_("the branch '%s' is not fully merged.\n"
-		      "If you are sure you want to delete it, "
-		      "run 'git branch -D %s'"), branchname, branchname);
+		error(_("the branch '%s' is not fully merged"), branchname);
+		advise_if_enabled(ADVICE_FORCE_DELETE_BRANCH,
+				  _("If you are sure you want to delete it, "
+				  "run 'git branch -D %s'"), branchname);
 		return -1;
 	}
 	return 0;
@@ -265,21 +272,24 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
 			}
 		}
 
-		target = resolve_refdup(name,
-					RESOLVE_REF_READING
-					| RESOLVE_REF_NO_RECURSE
-					| RESOLVE_REF_ALLOW_BAD_NAME,
-					&oid, &flags);
+		target = refs_resolve_refdup(get_main_ref_store(the_repository),
+					     name,
+					     RESOLVE_REF_READING
+					     | RESOLVE_REF_NO_RECURSE
+					     | RESOLVE_REF_ALLOW_BAD_NAME,
+					     &oid, &flags);
 		if (!target) {
 			if (remote_branch) {
 				error(_("remote-tracking branch '%s' not found"), bname.buf);
 			} else {
 				char *virtual_name = mkpathdup(fmt_remotes, bname.buf);
-				char *virtual_target = resolve_refdup(virtual_name,
-							RESOLVE_REF_READING
-							| RESOLVE_REF_NO_RECURSE
-							| RESOLVE_REF_ALLOW_BAD_NAME,
-							&oid, &flags);
+				char *virtual_target = refs_resolve_refdup(get_main_ref_store(the_repository),
+									   virtual_name,
+									   RESOLVE_REF_READING
+									   | RESOLVE_REF_NO_RECURSE
+									   | RESOLVE_REF_ALLOW_BAD_NAME,
+									   &oid,
+									   &flags);
 				FREE_AND_NULL(virtual_name);
 
 				if (virtual_target)
@@ -310,13 +320,13 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
 		free(target);
 	}
 
-	if (delete_refs(NULL, &refs_to_delete, REF_NO_DEREF))
+	if (refs_delete_refs(get_main_ref_store(the_repository), NULL, &refs_to_delete, REF_NO_DEREF))
 		ret = 1;
 
 	for_each_string_list_item(item, &refs_to_delete) {
 		char *describe_ref = item->util;
 		char *name = item->string;
-		if (!ref_exists(name)) {
+		if (!refs_ref_exists(get_main_ref_store(the_repository), name)) {
 			char *refname = name + branch_name_pos;
 			if (!quiet)
 				printf(remote_branch
@@ -435,8 +445,6 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 {
 	int i;
 	struct ref_array array;
-	struct strbuf out = STRBUF_INIT;
-	struct strbuf err = STRBUF_INIT;
 	int maxwidth = 0;
 	const char *remote_prefix = "";
 	char *to_free = NULL;
@@ -466,24 +474,27 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 	filter_ahead_behind(the_repository, format, &array);
 	ref_array_sort(sorting, &array);
 
-	for (i = 0; i < array.nr; i++) {
-		strbuf_reset(&err);
-		strbuf_reset(&out);
-		if (format_ref_array_item(array.items[i], format, &out, &err))
-			die("%s", err.buf);
-		if (column_active(colopts)) {
-			assert(!filter->verbose && "--column and --verbose are incompatible");
-			 /* format to a string_list to let print_columns() do its job */
+	if (column_active(colopts)) {
+		struct strbuf out = STRBUF_INIT, err = STRBUF_INIT;
+
+		assert(!filter->verbose && "--column and --verbose are incompatible");
+
+		for (i = 0; i < array.nr; i++) {
+			strbuf_reset(&err);
+			strbuf_reset(&out);
+			if (format_ref_array_item(array.items[i], format, &out, &err))
+				die("%s", err.buf);
+
+			/* format to a string_list to let print_columns() do its job */
 			string_list_append(output, out.buf);
-		} else {
-			fwrite(out.buf, 1, out.len, stdout);
-			if (out.len || !omit_empty)
-				putchar('\n');
 		}
+
+		strbuf_release(&err);
+		strbuf_release(&out);
+	} else {
+		print_formatted_ref_array(&array, format);
 	}
 
-	strbuf_release(&err);
-	strbuf_release(&out);
 	ref_array_clear(&array);
 	free(to_free);
 }
@@ -491,7 +502,8 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 static void print_current_branch_name(void)
 {
 	int flags;
-	const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, &flags);
+	const char *refname = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
+						      "HEAD", 0, NULL, &flags);
 	const char *shortname;
 	if (!refname)
 		die(_("could not resolve HEAD"));
@@ -547,7 +559,7 @@ static int replace_each_worktree_head_symref(struct worktree **worktrees,
 			continue;
 
 		refs = get_worktree_ref_store(worktrees[i]);
-		if (refs_create_symref(refs, "HEAD", newref, logmsg))
+		if (refs_update_symref(refs, "HEAD", newref, logmsg))
 			ret = error(_("HEAD of working tree %s is not updated"),
 				    worktrees[i]->path);
 	}
@@ -572,10 +584,14 @@ static void copy_or_rename_branch(const char *oldname, const char *newname, int
 		 * Bad name --- this could be an attempt to rename a
 		 * ref that we used to allow to be created by accident.
 		 */
-		if (ref_exists(oldref.buf))
+		if (refs_ref_exists(get_main_ref_store(the_repository), oldref.buf))
 			recovery = 1;
-		else
-			die(_("invalid branch name: '%s'"), oldname);
+		else {
+			int code = die_message(_("invalid branch name: '%s'"), oldname);
+			advise_if_enabled(ADVICE_REF_SYNTAX,
+					  _("See `man git check-ref-format`"));
+			exit(code);
+		}
 	}
 
 	for (int i = 0; worktrees[i]; i++) {
@@ -589,7 +605,7 @@ static void copy_or_rename_branch(const char *oldname, const char *newname, int
 		}
 	}
 
-	if ((copy || !(oldref_usage & IS_HEAD)) && !ref_exists(oldref.buf)) {
+	if ((copy || !(oldref_usage & IS_HEAD)) && !refs_ref_exists(get_main_ref_store(the_repository), oldref.buf)) {
 		if (oldref_usage & IS_HEAD)
 			die(_("no commit on branch '%s' yet"), oldname);
 		else
@@ -620,9 +636,9 @@ static void copy_or_rename_branch(const char *oldname, const char *newname, int
 			    oldref.buf, newref.buf);
 
 	if (!copy && !(oldref_usage & IS_ORPHAN) &&
-	    rename_ref(oldref.buf, newref.buf, logmsg.buf))
+	    refs_rename_ref(get_main_ref_store(the_repository), oldref.buf, newref.buf, logmsg.buf))
 		die(_("branch rename failed"));
-	if (copy && copy_existing_ref(oldref.buf, newref.buf, logmsg.buf))
+	if (copy && refs_copy_existing_ref(get_main_ref_store(the_repository), oldref.buf, newref.buf, logmsg.buf))
 		die(_("branch copy failed"));
 
 	if (recovery) {
@@ -665,18 +681,18 @@ static int edit_branch_description(const char *branch_name)
 	exists = !read_branch_desc(&buf, branch_name);
 	if (!buf.len || buf.buf[buf.len-1] != '\n')
 		strbuf_addch(&buf, '\n');
-	strbuf_commented_addf(&buf, comment_line_char,
+	strbuf_commented_addf(&buf, comment_line_str,
 		    _("Please edit the description for the branch\n"
 		      "  %s\n"
-		      "Lines starting with '%c' will be stripped.\n"),
-		    branch_name, comment_line_char);
+		      "Lines starting with '%s' will be stripped.\n"),
+		    branch_name, comment_line_str);
 	write_file_buf(edit_description(), buf.buf, buf.len);
 	strbuf_reset(&buf);
 	if (launch_editor(edit_description(), &buf, NULL)) {
 		strbuf_release(&buf);
 		return -1;
 	}
-	strbuf_stripspace(&buf, comment_line_char);
+	strbuf_stripspace(&buf, comment_line_str);
 
 	strbuf_addf(&name, "branch.%s.description", branch_name);
 	if (buf.len || exists)
@@ -734,7 +750,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 		OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
 		OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
 		OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
-		OPT_BOOL(0, "omit-empty",  &omit_empty,
+		OPT_BOOL(0, "omit-empty",  &format.array_opts.omit_empty,
 			N_("do not output a newline after empty formatted refs")),
 		OPT_BIT('c', "copy", &copy, N_("copy a branch and its reflog"), 1),
 		OPT_BIT('C', NULL, &copy, N_("copy a branch, even if target exists"), 2),
@@ -764,11 +780,18 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage_with_options(builtin_branch_usage, options);
 
+	/*
+	 * Try to set sort keys from config. If config does not set any,
+	 * fall back on default (refname) sorting.
+	 */
 	git_config(git_branch_config, &sorting_options);
+	if (!sorting_options.nr)
+		string_list_append(&sorting_options, "refname");
 
 	track = git_branch_track;
 
-	head = resolve_refdup("HEAD", 0, &head_oid, NULL);
+	head = refs_resolve_refdup(get_main_ref_store(the_repository), "HEAD",
+				   0, &head_oid, NULL);
 	if (!head)
 		die(_("failed to resolve HEAD as a valid ref"));
 	if (!strcmp(head, "HEAD"))
@@ -873,7 +896,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 		}
 
 		strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
-		if (!ref_exists(branch_ref.buf))
+		if (!refs_ref_exists(get_main_ref_store(the_repository), branch_ref.buf))
 			error((!argc || branch_checked_out(branch_ref.buf))
 			      ? _("no commit on branch '%s' yet")
 			      : _("no branch named '%s'"),
@@ -918,7 +941,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 			die(_("no such branch '%s'"), argv[0]);
 		}
 
-		if (!ref_exists(branch->refname)) {
+		if (!refs_ref_exists(get_main_ref_store(the_repository), branch->refname)) {
 			if (!argc || branch_checked_out(branch->refname))
 				die(_("no commit on branch '%s' yet"), branch->name);
 			die(_("branch '%s' does not exist"), branch->name);
diff --git a/builtin/bugreport.c b/builtin/bugreport.c
index 3106e56..25f860a 100644
--- a/builtin/bugreport.c
+++ b/builtin/bugreport.c
@@ -64,7 +64,8 @@ static void get_populated_hooks(struct strbuf *hook_info, int nongit)
 }
 
 static const char * const bugreport_usage[] = {
-	N_("git bugreport [(-o | --output-directory) <path>] [(-s | --suffix) <format>]\n"
+	N_("git bugreport [(-o | --output-directory) <path>]\n"
+	   "              [(-s | --suffix) <format> | --no-suffix]\n"
 	   "              [--diagnose[=<mode>]]"),
 	NULL
 };
@@ -138,8 +139,11 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 	strbuf_complete(&report_path, '/');
 	output_path_len = report_path.len;
 
-	strbuf_addstr(&report_path, "git-bugreport-");
-	strbuf_addftime(&report_path, option_suffix, localtime_r(&now, &tm), 0, 0);
+	strbuf_addstr(&report_path, "git-bugreport");
+	if (option_suffix) {
+		strbuf_addch(&report_path, '-');
+		strbuf_addftime(&report_path, option_suffix, localtime_r(&now, &tm), 0, 0);
+	}
 	strbuf_addstr(&report_path, ".txt");
 
 	switch (safe_create_leading_directories(report_path.buf)) {
diff --git a/builtin/bundle.c b/builtin/bundle.c
index 3ad11dc..d5d41a8 100644
--- a/builtin/bundle.c
+++ b/builtin/bundle.c
@@ -140,6 +140,11 @@ static int cmd_bundle_verify(int argc, const char **argv, const char *prefix) {
 			builtin_bundle_verify_usage, options, &bundle_file);
 	/* bundle internals use argv[1] as further parameters */
 
+	if (!startup_info->have_repository) {
+		ret = error(_("need a repository to verify a bundle"));
+		goto cleanup;
+	}
+
 	if ((bundle_fd = open_bundle(bundle_file, &header, &name)) < 0) {
 		ret = 1;
 		goto cleanup;
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 7d48993..43a1d7a 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) Linus Torvalds, 2005
  */
-#define USE_THE_INDEX_VARIABLE
+
 #include "builtin.h"
 #include "config.h"
 #include "convert.h"
@@ -77,7 +77,7 @@ static int filter_object(const char *path, unsigned mode,
 		struct checkout_metadata meta;
 
 		init_checkout_metadata(&meta, NULL, NULL, oid);
-		if (convert_to_working_tree(&the_index, path, *buf, *size, &strbuf, &meta)) {
+		if (convert_to_working_tree(the_repository->index, path, *buf, *size, &strbuf, &meta)) {
 			free(*buf);
 			*size = strbuf.len;
 			*buf = strbuf_detach(&strbuf, NULL);
@@ -106,7 +106,10 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
 	struct object_info oi = OBJECT_INFO_INIT;
 	struct strbuf sb = STRBUF_INIT;
 	unsigned flags = OBJECT_INFO_LOOKUP_REPLACE;
-	unsigned get_oid_flags = GET_OID_RECORD_PATH | GET_OID_ONLY_TO_DIE;
+	unsigned get_oid_flags =
+		GET_OID_RECORD_PATH |
+		GET_OID_ONLY_TO_DIE |
+		GET_OID_HASH_ANY;
 	const char *path = force_path;
 	const int opt_cw = (opt == 'c' || opt == 'w');
 	if (!path && opt_cw)
@@ -221,8 +224,13 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
 								     &type,
 								     &size);
 				const char *target;
+
+				if (!buffer)
+					die(_("unable to read %s"), oid_to_hex(&oid));
+
 				if (!skip_prefix(buffer, "object ", &target) ||
-				    get_oid_hex(target, &blob_oid))
+				    get_oid_hex_algop(target, &blob_oid,
+						      &hash_algos[oid.algo]))
 					die("%s not a valid tag", oid_to_hex(&oid));
 				free(buffer);
 			} else
@@ -306,8 +314,8 @@ static int is_atom(const char *atom, const char *s, int slen)
 	return alen == slen && !memcmp(atom, s, alen);
 }
 
-static void expand_atom(struct strbuf *sb, const char *atom, int len,
-			struct expand_data *data)
+static int expand_atom(struct strbuf *sb, const char *atom, int len,
+		       struct expand_data *data)
 {
 	if (is_atom("objectname", atom, len)) {
 		if (!data->mark_query)
@@ -339,7 +347,8 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
 			strbuf_addstr(sb,
 				      oid_to_hex(&data->delta_base_oid));
 	} else
-		die("unknown format element: %.*s", len, atom);
+		return 0;
+	return 1;
 }
 
 static void expand_format(struct strbuf *sb, const char *start,
@@ -350,12 +359,11 @@ static void expand_format(struct strbuf *sb, const char *start,
 
 		if (skip_prefix(start, "%", &start) || *start != '(')
 			strbuf_addch(sb, '%');
-		else if (!(end = strchr(start + 1, ')')))
-			die("format element '%s' does not end in ')'", start);
-		else {
-			expand_atom(sb, start + 1, end - start - 1, data);
+		else if ((end = strchr(start + 1, ')')) &&
+			 expand_atom(sb, start + 1, end - start - 1, data))
 			start = end + 1;
-		}
+		else
+			strbuf_expand_bad_format(start, "cat-file");
 	}
 }
 
@@ -416,6 +424,8 @@ static void print_object_or_die(struct batch_options *opt, struct expand_data *d
 
 		contents = repo_read_object_file(the_repository, oid, &type,
 						 &size);
+		if (!contents)
+			die("object %s disappeared", oid_to_hex(oid));
 
 		if (use_mailmap) {
 			size_t s = size;
@@ -423,8 +433,6 @@ static void print_object_or_die(struct batch_options *opt, struct expand_data *d
 			size = cast_size_t_to_ulong(s);
 		}
 
-		if (!contents)
-			die("object %s disappeared", oid_to_hex(oid));
 		if (type != data->type)
 			die("object %s changed type!?", oid_to_hex(oid));
 		if (data->info.sizep && size != data->size && !use_mailmap)
@@ -481,6 +489,8 @@ static void batch_object_write(const char *obj_name,
 
 			buf = repo_read_object_file(the_repository, &data->oid, &data->type,
 						    &data->size);
+			if (!buf)
+				die(_("unable to read %s"), oid_to_hex(&data->oid));
 			buf = replace_idents_using_mailmap(buf, &s);
 			data->size = cast_size_t_to_ulong(s);
 
@@ -511,7 +521,9 @@ static void batch_one_object(const char *obj_name,
 			     struct expand_data *data)
 {
 	struct object_context ctx;
-	int flags = opt->follow_symlinks ? GET_OID_FOLLOW_SYMLINKS : 0;
+	int flags =
+		GET_OID_HASH_ANY |
+		(opt->follow_symlinks ? GET_OID_FOLLOW_SYMLINKS : 0);
 	enum get_oid_result result;
 
 	result = get_oid_with_context(the_repository, obj_name,
diff --git a/builtin/check-attr.c b/builtin/check-attr.c
index c1da1d1..9376810 100644
--- a/builtin/check-attr.c
+++ b/builtin/check-attr.c
@@ -1,4 +1,3 @@
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "config.h"
 #include "attr.h"
@@ -71,9 +70,9 @@ static void check_attr(const char *prefix, struct attr_check *check,
 		prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
 
 	if (collect_all) {
-		git_all_attrs(&the_index, full_path, check);
+		git_all_attrs(the_repository->index, full_path, check);
 	} else {
-		git_check_attr(&the_index, full_path, check);
+		git_check_attr(the_repository->index, full_path, check);
 	}
 	output_attr(check, file);
 
diff --git a/builtin/check-ignore.c b/builtin/check-ignore.c
index 906cd96..6c43430 100644
--- a/builtin/check-ignore.c
+++ b/builtin/check-ignore.c
@@ -1,4 +1,3 @@
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "config.h"
 #include "dir.h"
@@ -95,21 +94,21 @@ static int check_ignore(struct dir_struct *dir,
 		       PATHSPEC_KEEP_ORDER,
 		       prefix, argv);
 
-	die_path_inside_submodule(&the_index, &pathspec);
+	die_path_inside_submodule(the_repository->index, &pathspec);
 
 	/*
 	 * look for pathspecs matching entries in the index, since these
 	 * should not be ignored, in order to be consistent with
 	 * 'git status', 'git add' etc.
 	 */
-	seen = find_pathspecs_matching_against_index(&pathspec, &the_index,
+	seen = find_pathspecs_matching_against_index(&pathspec, the_repository->index,
 						     PS_HEED_SKIP_WORKTREE);
 	for (i = 0; i < pathspec.nr; i++) {
 		full_path = pathspec.items[i].match;
 		pattern = NULL;
 		if (!seen[i]) {
 			int dtype = DT_UNKNOWN;
-			pattern = last_matching_pattern(dir, &the_index,
+			pattern = last_matching_pattern(dir, the_repository->index,
 							full_path, &dtype);
 			if (!verbose && pattern &&
 			    pattern->flags & PATTERN_FLAG_NEGATIVE)
diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
index 2e086a2..29e744d 100644
--- a/builtin/checkout-index.c
+++ b/builtin/checkout-index.c
@@ -4,7 +4,7 @@
  * Copyright (C) 2005 Linus Torvalds
  *
  */
-#define USE_THE_INDEX_VARIABLE
+
 #include "builtin.h"
 #include "config.h"
 #include "gettext.h"
@@ -69,7 +69,7 @@ static void write_tempfile_record(const char *name, const char *prefix)
 static int checkout_file(const char *name, const char *prefix)
 {
 	int namelen = strlen(name);
-	int pos = index_name_pos(&the_index, name, namelen);
+	int pos = index_name_pos(the_repository->index, name, namelen);
 	int has_same_name = 0;
 	int is_file = 0;
 	int is_skipped = 1;
@@ -79,8 +79,8 @@ static int checkout_file(const char *name, const char *prefix)
 	if (pos < 0)
 		pos = -pos - 1;
 
-	while (pos < the_index.cache_nr) {
-		struct cache_entry *ce = the_index.cache[pos];
+	while (pos <the_repository->index->cache_nr) {
+		struct cache_entry *ce =the_repository->index->cache[pos];
 		if (ce_namelen(ce) != namelen ||
 		    memcmp(ce->name, name, namelen))
 			break;
@@ -140,8 +140,8 @@ static int checkout_all(const char *prefix, int prefix_length)
 	int i, errs = 0;
 	struct cache_entry *last_ce = NULL;
 
-	for (i = 0; i < the_index.cache_nr ; i++) {
-		struct cache_entry *ce = the_index.cache[i];
+	for (i = 0; i < the_repository->index->cache_nr ; i++) {
+		struct cache_entry *ce = the_repository->index->cache[i];
 
 		if (S_ISSPARSEDIR(ce->ce_mode)) {
 			if (!ce_skip_worktree(ce))
@@ -154,8 +154,8 @@ static int checkout_all(const char *prefix, int prefix_length)
 			 * first entry inside the expanded sparse directory).
 			 */
 			if (ignore_skip_worktree) {
-				ensure_full_index(&the_index);
-				ce = the_index.cache[i];
+				ensure_full_index(the_repository->index);
+				ce = the_repository->index->cache[i];
 			}
 		}
 
@@ -260,7 +260,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 			builtin_checkout_index_usage, 0);
-	state.istate = &the_index;
+	state.istate = the_repository->index;
 	state.force = force;
 	state.quiet = quiet;
 	state.not_new = not_new;
@@ -280,7 +280,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 	 */
 	if (index_opt && !state.base_dir_len && !to_tempfile) {
 		state.refresh_cache = 1;
-		state.istate = &the_index;
+		state.istate = the_repository->index;
 		repo_hold_locked_index(the_repository, &lock_file,
 				       LOCK_DIE_ON_ERROR);
 	}
@@ -339,7 +339,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 		return 1;
 
 	if (is_lock_file_locked(&lock_file) &&
-	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+	    write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 		die("Unable to write new index file");
 	return 0;
 }
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 3a7bfde..3cf44b4 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -1,4 +1,3 @@
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "advice.h"
 #include "branch.h"
@@ -91,7 +90,7 @@ struct checkout_opts {
 	int new_branch_log;
 	enum branch_track track;
 	struct diff_options diff_options;
-	char *conflict_style;
+	int conflict_style;
 
 	int branch_exists;
 	const char *prefix;
@@ -100,6 +99,8 @@ struct checkout_opts {
 	struct tree *source_tree;
 };
 
+#define CHECKOUT_OPTS_INIT { .conflict_style = -1, .merge = -1 }
+
 struct branch_info {
 	char *name; /* The short name used */
 	char *path; /* The full name of a real branch */
@@ -144,7 +145,7 @@ static int update_some(const struct object_id *oid, struct strbuf *base,
 		return READ_TREE_RECURSIVE;
 
 	len = base->len + strlen(pathname);
-	ce = make_empty_cache_entry(&the_index, len);
+	ce = make_empty_cache_entry(the_repository->index, len);
 	oidcpy(&ce->oid, oid);
 	memcpy(ce->name, base->buf, base->len);
 	memcpy(ce->name + base->len, pathname, len - base->len);
@@ -157,9 +158,9 @@ static int update_some(const struct object_id *oid, struct strbuf *base,
 	 * entry in place. Whether it is UPTODATE or not, checkout_entry will
 	 * do the right thing.
 	 */
-	pos = index_name_pos(&the_index, ce->name, ce->ce_namelen);
+	pos = index_name_pos(the_repository->index, ce->name, ce->ce_namelen);
 	if (pos >= 0) {
-		struct cache_entry *old = the_index.cache[pos];
+		struct cache_entry *old = the_repository->index->cache[pos];
 		if (ce->ce_mode == old->ce_mode &&
 		    !ce_intent_to_add(old) &&
 		    oideq(&ce->oid, &old->oid)) {
@@ -169,7 +170,7 @@ static int update_some(const struct object_id *oid, struct strbuf *base,
 		}
 	}
 
-	add_index_entry(&the_index, ce,
+	add_index_entry(the_repository->index, ce,
 			ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
 	return 0;
 }
@@ -188,8 +189,8 @@ static int read_tree_some(struct tree *tree, const struct pathspec *pathspec)
 
 static int skip_same_name(const struct cache_entry *ce, int pos)
 {
-	while (++pos < the_index.cache_nr &&
-	       !strcmp(the_index.cache[pos]->name, ce->name))
+	while (++pos < the_repository->index->cache_nr &&
+	       !strcmp(the_repository->index->cache[pos]->name, ce->name))
 		; /* skip */
 	return pos;
 }
@@ -197,9 +198,9 @@ static int skip_same_name(const struct cache_entry *ce, int pos)
 static int check_stage(int stage, const struct cache_entry *ce, int pos,
 		       int overlay_mode)
 {
-	while (pos < the_index.cache_nr &&
-	       !strcmp(the_index.cache[pos]->name, ce->name)) {
-		if (ce_stage(the_index.cache[pos]) == stage)
+	while (pos < the_repository->index->cache_nr &&
+	       !strcmp(the_repository->index->cache[pos]->name, ce->name)) {
+		if (ce_stage(the_repository->index->cache[pos]) == stage)
 			return 0;
 		pos++;
 	}
@@ -216,8 +217,8 @@ static int check_stages(unsigned stages, const struct cache_entry *ce, int pos)
 	unsigned seen = 0;
 	const char *name = ce->name;
 
-	while (pos < the_index.cache_nr) {
-		ce = the_index.cache[pos];
+	while (pos < the_repository->index->cache_nr) {
+		ce = the_repository->index->cache[pos];
 		if (strcmp(name, ce->name))
 			break;
 		seen |= (1 << ce_stage(ce));
@@ -233,10 +234,10 @@ static int checkout_stage(int stage, const struct cache_entry *ce, int pos,
 			  const struct checkout *state, int *nr_checkouts,
 			  int overlay_mode)
 {
-	while (pos < the_index.cache_nr &&
-	       !strcmp(the_index.cache[pos]->name, ce->name)) {
-		if (ce_stage(the_index.cache[pos]) == stage)
-			return checkout_entry(the_index.cache[pos], state,
+	while (pos < the_repository->index->cache_nr &&
+	       !strcmp(the_repository->index->cache[pos]->name, ce->name)) {
+		if (ce_stage(the_repository->index->cache[pos]) == stage)
+			return checkout_entry(the_repository->index->cache[pos], state,
 					      NULL, nr_checkouts);
 		pos++;
 	}
@@ -251,9 +252,10 @@ static int checkout_stage(int stage, const struct cache_entry *ce, int pos,
 }
 
 static int checkout_merged(int pos, const struct checkout *state,
-			   int *nr_checkouts, struct mem_pool *ce_mem_pool)
+			   int *nr_checkouts, struct mem_pool *ce_mem_pool,
+			   int conflict_style)
 {
-	struct cache_entry *ce = the_index.cache[pos];
+	struct cache_entry *ce = the_repository->index->cache[pos];
 	const char *path = ce->name;
 	mmfile_t ancestor, ours, theirs;
 	enum ll_merge_result merge_status;
@@ -262,11 +264,11 @@ static int checkout_merged(int pos, const struct checkout *state,
 	mmbuffer_t result_buf;
 	struct object_id threeway[3];
 	unsigned mode = 0;
-	struct ll_merge_options ll_opts;
+	struct ll_merge_options ll_opts = LL_MERGE_OPTIONS_INIT;
 	int renormalize = 0;
 
 	memset(threeway, 0, sizeof(threeway));
-	while (pos < the_index.cache_nr) {
+	while (pos < the_repository->index->cache_nr) {
 		int stage;
 		stage = ce_stage(ce);
 		if (!stage || strcmp(path, ce->name))
@@ -275,7 +277,7 @@ static int checkout_merged(int pos, const struct checkout *state,
 		if (stage == 2)
 			mode = create_ce_mode(ce->ce_mode);
 		pos++;
-		ce = the_index.cache[pos];
+		ce = the_repository->index->cache[pos];
 	}
 	if (is_null_oid(&threeway[1]) || is_null_oid(&threeway[2]))
 		return error(_("path '%s' does not have necessary versions"), path);
@@ -284,9 +286,9 @@ static int checkout_merged(int pos, const struct checkout *state,
 	read_mmblob(&ours, &threeway[1]);
 	read_mmblob(&theirs, &threeway[2]);
 
-	memset(&ll_opts, 0, sizeof(ll_opts));
 	git_config_get_bool("merge.renormalize", &renormalize);
 	ll_opts.renormalize = renormalize;
+	ll_opts.conflict_style = conflict_style;
 	merge_status = ll_merge(&result_buf, path, &ancestor, "base",
 				&ours, "ours", &theirs, "theirs",
 				state->istate, &ll_opts);
@@ -353,7 +355,7 @@ static void mark_ce_for_checkout_overlay(struct cache_entry *ce,
 	 * match_pathspec() for _all_ entries when
 	 * opts->source_tree != NULL.
 	 */
-	if (ce_path_match(&the_index, ce, &opts->pathspec, ps_matched))
+	if (ce_path_match(the_repository->index, ce, &opts->pathspec, ps_matched))
 		ce->ce_flags |= CE_MATCHED;
 }
 
@@ -364,7 +366,7 @@ static void mark_ce_for_checkout_no_overlay(struct cache_entry *ce,
 	ce->ce_flags &= ~CE_MATCHED;
 	if (!opts->ignore_skipworktree && ce_skip_worktree(ce))
 		return;
-	if (ce_path_match(&the_index, ce, &opts->pathspec, ps_matched)) {
+	if (ce_path_match(the_repository->index, ce, &opts->pathspec, ps_matched)) {
 		ce->ce_flags |= CE_MATCHED;
 		if (opts->source_tree && !(ce->ce_flags & CE_UPDATE))
 			/*
@@ -388,7 +390,7 @@ static int checkout_worktree(const struct checkout_opts *opts,
 
 	state.force = 1;
 	state.refresh_cache = 1;
-	state.istate = &the_index;
+	state.istate = the_repository->index;
 
 	mem_pool_init(&ce_mem_pool, 0);
 	get_parallel_checkout_configs(&pc_workers, &pc_threshold);
@@ -401,8 +403,8 @@ static int checkout_worktree(const struct checkout_opts *opts,
 	if (pc_workers > 1)
 		init_parallel_checkout();
 
-	for (pos = 0; pos < the_index.cache_nr; pos++) {
-		struct cache_entry *ce = the_index.cache[pos];
+	for (pos = 0; pos < the_repository->index->cache_nr; pos++) {
+		struct cache_entry *ce = the_repository->index->cache[pos];
 		if (ce->ce_flags & CE_MATCHED) {
 			if (!ce_stage(ce)) {
 				errs |= checkout_entry(ce, &state,
@@ -417,7 +419,8 @@ static int checkout_worktree(const struct checkout_opts *opts,
 			else if (opts->merge)
 				errs |= checkout_merged(pos, &state,
 							&nr_unmerged,
-							&ce_mem_pool);
+							&ce_mem_pool,
+							opts->conflict_style);
 			pos = skip_same_name(ce, pos) - 1;
 		}
 	}
@@ -425,7 +428,7 @@ static int checkout_worktree(const struct checkout_opts *opts,
 		errs |= run_parallel_checkout(&state, pc_workers, pc_threshold,
 					      NULL, NULL);
 	mem_pool_discard(&ce_mem_pool, should_validate_cache_entries());
-	remove_marked_cache_entries(&the_index, 1);
+	remove_marked_cache_entries(the_repository->index, 1);
 	remove_scheduled_dirs();
 	errs |= finish_delayed_checkout(&state, opts->show_progress);
 
@@ -567,7 +570,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 	if (opts->source_tree)
 		read_tree_some(opts->source_tree, &opts->pathspec);
 	if (opts->merge)
-		unmerge_index(&the_index, &opts->pathspec, CE_MATCHED);
+		unmerge_index(the_repository->index, &opts->pathspec, CE_MATCHED);
 
 	ps_matched = xcalloc(opts->pathspec.nr, 1);
 
@@ -575,13 +578,13 @@ static int checkout_paths(const struct checkout_opts *opts,
 	 * Make sure all pathspecs participated in locating the paths
 	 * to be checked out.
 	 */
-	for (pos = 0; pos < the_index.cache_nr; pos++)
+	for (pos = 0; pos < the_repository->index->cache_nr; pos++)
 		if (opts->overlay_mode)
-			mark_ce_for_checkout_overlay(the_index.cache[pos],
+			mark_ce_for_checkout_overlay(the_repository->index->cache[pos],
 						     ps_matched,
 						     opts);
 		else
-			mark_ce_for_checkout_no_overlay(the_index.cache[pos],
+			mark_ce_for_checkout_no_overlay(the_repository->index->cache[pos],
 							ps_matched,
 							opts);
 
@@ -592,8 +595,8 @@ static int checkout_paths(const struct checkout_opts *opts,
 	free(ps_matched);
 
 	/* Any unmerged paths? */
-	for (pos = 0; pos < the_index.cache_nr; pos++) {
-		const struct cache_entry *ce = the_index.cache[pos];
+	for (pos = 0; pos < the_repository->index->cache_nr; pos++) {
+		const struct cache_entry *ce = the_repository->index->cache[pos];
 		if (ce->ce_flags & CE_MATCHED) {
 			if (!ce_stage(ce))
 				continue;
@@ -618,7 +621,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 	if (opts->checkout_worktree)
 		errs |= checkout_worktree(opts, new_branch_info);
 	else
-		remove_marked_cache_entries(&the_index, 1);
+		remove_marked_cache_entries(the_repository->index, 1);
 
 	/*
 	 * Allow updating the index when checking out from the index.
@@ -630,7 +633,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 		checkout_index = opts->checkout_index;
 
 	if (checkout_index) {
-		if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+		if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 			die(_("unable to write new index file"));
 	} else {
 		/*
@@ -642,7 +645,8 @@ static int checkout_paths(const struct checkout_opts *opts,
 		rollback_lock_file(&lock_file);
 	}
 
-	read_ref_full("HEAD", 0, &rev, NULL);
+	refs_read_ref_full(get_main_ref_store(the_repository), "HEAD", 0,
+			   &rev, NULL);
 	head = lookup_commit_reference_gently(the_repository, &rev, 1);
 
 	errs |= post_checkout_hook(head, head, 0);
@@ -699,13 +703,14 @@ static int reset_tree(struct tree *tree, const struct checkout_opts *o,
 	opts.merge = 1;
 	opts.fn = oneway_merge;
 	opts.verbose_update = o->show_progress;
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
+	opts.src_index = the_repository->index;
+	opts.dst_index = the_repository->index;
 	init_checkout_metadata(&opts.meta, info->refname,
 			       info->commit ? &info->commit->object.oid : null_oid(),
 			       NULL);
-	parse_tree(tree);
-	init_tree_desc(&tree_desc, tree->buffer, tree->size);
+	if (parse_tree(tree) < 0)
+		return 128;
+	init_tree_desc(&tree_desc, &tree->object.oid, tree->buffer, tree->size);
 	switch (unpack_trees(1, &tree_desc, &opts)) {
 	case -2:
 		*writeout_error = 1;
@@ -751,12 +756,12 @@ static void init_topts(struct unpack_trees_options *topts, int merge,
 {
 	memset(topts, 0, sizeof(*topts));
 	topts->head_idx = -1;
-	topts->src_index = &the_index;
-	topts->dst_index = &the_index;
+	topts->src_index = the_repository->index;
+	topts->dst_index = the_repository->index;
 
 	setup_unpack_trees_porcelain(topts, "checkout");
 
-	topts->initial_checkout = is_index_unborn(&the_index);
+	topts->initial_checkout = is_index_unborn(the_repository->index);
 	topts->update = 1;
 	topts->merge = 1;
 	topts->quiet = merge && old_commit;
@@ -778,14 +783,20 @@ static int merge_working_tree(const struct checkout_opts *opts,
 	if (repo_read_index_preload(the_repository, NULL, 0) < 0)
 		return error(_("index file corrupt"));
 
-	resolve_undo_clear_index(&the_index);
+	resolve_undo_clear_index(the_repository->index);
 	if (opts->new_orphan_branch && opts->orphan_from_empty_tree) {
 		if (new_branch_info->commit)
 			BUG("'switch --orphan' should never accept a commit as starting point");
 		new_tree = parse_tree_indirect(the_hash_algo->empty_tree);
-	} else
+		if (!new_tree)
+			BUG("unable to read empty tree");
+	} else {
 		new_tree = repo_get_commit_tree(the_repository,
 						new_branch_info->commit);
+		if (!new_tree)
+			return error(_("unable to read tree (%s)"),
+				     oid_to_hex(&new_branch_info->commit->object.oid));
+	}
 	if (opts->discard_changes) {
 		ret = reset_tree(new_tree, opts, 1, writeout_error, new_branch_info);
 		if (ret)
@@ -796,9 +807,9 @@ static int merge_working_tree(const struct checkout_opts *opts,
 		struct unpack_trees_options topts;
 		const struct object_id *old_commit_oid;
 
-		refresh_index(&the_index, REFRESH_QUIET, NULL, NULL, NULL);
+		refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL);
 
-		if (unmerged_index(&the_index)) {
+		if (unmerged_index(the_repository->index)) {
 			error(_("you need to resolve your current index first"));
 			return 1;
 		}
@@ -819,10 +830,13 @@ static int merge_working_tree(const struct checkout_opts *opts,
 			die(_("unable to parse commit %s"),
 				oid_to_hex(old_commit_oid));
 
-		init_tree_desc(&trees[0], tree->buffer, tree->size);
-		parse_tree(new_tree);
+		init_tree_desc(&trees[0], &tree->object.oid,
+			       tree->buffer, tree->size);
+		if (parse_tree(new_tree) < 0)
+			exit(128);
 		tree = new_tree;
-		init_tree_desc(&trees[1], tree->buffer, tree->size);
+		init_tree_desc(&trees[1], &tree->object.oid,
+			       tree->buffer, tree->size);
 
 		ret = unpack_trees(2, trees, &topts);
 		clear_unpack_trees_porcelain(&topts);
@@ -868,7 +882,8 @@ static int merge_working_tree(const struct checkout_opts *opts,
 			 * entries in the index.
 			 */
 
-			add_files_to_cache(the_repository, NULL, NULL, 0, 0);
+			add_files_to_cache(the_repository, NULL, NULL, NULL, 0,
+					   0);
 			init_merge_options(&o, the_repository);
 			o.verbosity = 0;
 			work = write_in_core_index_as_tree(the_repository);
@@ -887,6 +902,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
 			}
 			o.branch1 = new_branch_info->name;
 			o.branch2 = "local";
+			o.conflict_style = opts->conflict_style;
 			ret = merge_trees(&o,
 					  new_tree,
 					  work,
@@ -903,10 +919,10 @@ static int merge_working_tree(const struct checkout_opts *opts,
 		}
 	}
 
-	if (!cache_tree_fully_valid(the_index.cache_tree))
-		cache_tree_update(&the_index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR);
+	if (!cache_tree_fully_valid(the_repository->index->cache_tree))
+		cache_tree_update(the_repository->index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR);
 
-	if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+	if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
 	if (!opts->discard_changes && !opts->quiet && new_branch_info->commit)
@@ -942,7 +958,8 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 				int ret;
 				struct strbuf err = STRBUF_INIT;
 
-				ret = safe_create_reflog(refname, &err);
+				ret = refs_create_reflog(get_main_ref_store(the_repository),
+							 refname, &err);
 				if (ret) {
 					fprintf(stderr, _("Can not do reflog for '%s': %s\n"),
 						opts->new_orphan_branch, err.buf);
@@ -983,8 +1000,10 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 	if (!strcmp(new_branch_info->name, "HEAD") && !new_branch_info->path && !opts->force_detach) {
 		/* Nothing to do. */
 	} else if (opts->force_detach || !new_branch_info->path) {	/* No longer on any branch. */
-		update_ref(msg.buf, "HEAD", &new_branch_info->commit->object.oid, NULL,
-			   REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository), msg.buf,
+				"HEAD", &new_branch_info->commit->object.oid,
+				NULL,
+				REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
 		if (!opts->quiet) {
 			if (old_branch_info->path &&
 			    advice_enabled(ADVICE_DETACHED_HEAD) && !opts->force_detach)
@@ -992,7 +1011,7 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 			describe_detached_head(_("HEAD is now at"), new_branch_info->commit);
 		}
 	} else if (new_branch_info->path) {	/* Switch branches. */
-		if (create_symref("HEAD", new_branch_info->path, msg.buf) < 0)
+		if (refs_update_symref(get_main_ref_store(the_repository), "HEAD", new_branch_info->path, msg.buf) < 0)
 			die(_("unable to update HEAD"));
 		if (!opts->quiet) {
 			if (old_branch_info->path && !strcmp(new_branch_info->path, old_branch_info->path)) {
@@ -1013,14 +1032,16 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 			}
 		}
 		if (old_branch_info->path && old_branch_info->name) {
-			if (!ref_exists(old_branch_info->path) && reflog_exists(old_branch_info->path))
-				delete_reflog(old_branch_info->path);
+			if (!refs_ref_exists(get_main_ref_store(the_repository), old_branch_info->path) && refs_reflog_exists(get_main_ref_store(the_repository), old_branch_info->path))
+				refs_delete_reflog(get_main_ref_store(the_repository),
+						   old_branch_info->path);
 		}
 	}
 	remove_branch_state(the_repository, !opts->quiet);
 	strbuf_release(&msg);
 	if (!opts->quiet &&
-	    (new_branch_info->path || (!opts->force_detach && !strcmp(new_branch_info->name, "HEAD"))))
+	    !opts->force_detach &&
+	    (new_branch_info->path || !strcmp(new_branch_info->name, "HEAD")))
 		report_tracking(new_branch_info);
 }
 
@@ -1112,7 +1133,8 @@ static void orphaned_commit_warning(struct commit *old_commit, struct commit *ne
 	object->flags &= ~UNINTERESTING;
 	add_pending_object(&revs, object, oid_to_hex(&object->oid));
 
-	for_each_ref(add_pending_uninteresting_ref, &revs);
+	refs_for_each_ref(get_main_ref_store(the_repository),
+			  add_pending_uninteresting_ref, &revs);
 	if (new_commit)
 		add_pending_oid(&revs, "HEAD",
 				&new_commit->object.oid,
@@ -1142,7 +1164,8 @@ static int switch_branches(const struct checkout_opts *opts,
 	trace2_cmd_mode("branch");
 
 	memset(&old_branch_info, 0, sizeof(old_branch_info));
-	old_branch_info.path = resolve_refdup("HEAD", 0, &rev, &flag);
+	old_branch_info.path = refs_resolve_refdup(get_main_ref_store(the_repository),
+						   "HEAD", 0, &rev, &flag);
 	if (old_branch_info.path)
 		old_branch_info.commit = lookup_commit_reference_gently(the_repository, &rev, 1);
 	if (!(flag & REF_ISSYMREF))
@@ -1224,11 +1247,13 @@ static void setup_new_branch_info_and_source_tree(
 	struct tree **source_tree = &opts->source_tree;
 	struct object_id branch_rev;
 
-	new_branch_info->name = xstrdup(arg);
+	/* treat '@' as a shortcut for 'HEAD' */
+	new_branch_info->name = !strcmp(arg, "@") ? xstrdup("HEAD") :
+						    xstrdup(arg);
 	setup_branch_path(new_branch_info);
 
 	if (!check_refname_format(new_branch_info->path, 0) &&
-	    !read_ref(new_branch_info->path, &branch_rev))
+	    !refs_read_ref(get_main_ref_store(the_repository), new_branch_info->path, &branch_rev))
 		oidcpy(rev, &branch_rev);
 	else
 		/* not an existing branch */
@@ -1238,19 +1263,24 @@ static void setup_new_branch_info_and_source_tree(
 	if (!new_branch_info->commit) {
 		/* not a commit */
 		*source_tree = parse_tree_indirect(rev);
+		if (!*source_tree)
+			die(_("unable to read tree (%s)"), oid_to_hex(rev));
 	} else {
 		parse_commit_or_die(new_branch_info->commit);
 		*source_tree = repo_get_commit_tree(the_repository,
 						    new_branch_info->commit);
+		if (!*source_tree)
+			die(_("unable to read tree (%s)"),
+			    oid_to_hex(&new_branch_info->commit->object.oid));
 	}
 }
 
-static const char *parse_remote_branch(const char *arg,
-				       struct object_id *rev,
-				       int could_be_checkout_paths)
+static char *parse_remote_branch(const char *arg,
+				 struct object_id *rev,
+				 int could_be_checkout_paths)
 {
 	int num_matches = 0;
-	const char *remote = unique_tracking_name(arg, rev, &num_matches);
+	char *remote = unique_tracking_name(arg, rev, &num_matches);
 
 	if (remote && could_be_checkout_paths) {
 		die(_("'%s' could be both a local file and a tracking branch.\n"
@@ -1286,6 +1316,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 	const char **new_branch = &opts->new_branch;
 	int argcount = 0;
 	const char *arg;
+	char *remote = NULL;
 	int dash_dash_pos;
 	int has_dash_dash = 0;
 	int i;
@@ -1386,8 +1417,8 @@ static int parse_branchname_arg(int argc, const char **argv,
 			recover_with_dwim = 0;
 
 		if (recover_with_dwim) {
-			const char *remote = parse_remote_branch(arg, rev,
-								 could_be_checkout_paths);
+			remote = parse_remote_branch(arg, rev,
+						     could_be_checkout_paths);
 			if (remote) {
 				*new_branch = arg;
 				arg = remote;
@@ -1429,6 +1460,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 		argc--;
 	}
 
+	free(remote);
 	return argcount;
 }
 
@@ -1442,7 +1474,8 @@ static int switch_unborn_to_new_branch(const struct checkout_opts *opts)
 	if (!opts->new_branch)
 		die(_("You are on a branch yet to be born"));
 	strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch);
-	status = create_symref("HEAD", branch_ref.buf, "checkout -b");
+	status = refs_update_symref(get_main_ref_store(the_repository),
+				    "HEAD", branch_ref.buf, "checkout -b");
 	strbuf_release(&branch_ref);
 	if (!opts->quiet)
 		fprintf(stderr, _("Switched to a new branch '%s'\n"),
@@ -1515,6 +1548,27 @@ static void die_if_some_operation_in_progress(void)
 	wt_status_state_free_buffers(&state);
 }
 
+/*
+ * die if attempting to checkout an existing branch that is in use
+ * in another worktree, unless ignore-other-wortrees option is given.
+ * The check is bypassed when the branch is already the current one,
+ * as it will not make things any worse.
+ */
+static void die_if_switching_to_a_branch_in_use(struct checkout_opts *opts,
+						const char *full_ref)
+{
+	int flags;
+	char *head_ref;
+
+	if (opts->ignore_other_worktrees)
+		return;
+	head_ref = refs_resolve_refdup(get_main_ref_store(the_repository),
+				       "HEAD", 0, NULL, &flags);
+	if (head_ref && (!(flags & REF_ISSYMREF) || strcmp(head_ref, full_ref)))
+		die_if_checked_out(full_ref, 1);
+	free(head_ref);
+}
+
 static int checkout_branch(struct checkout_opts *opts,
 			   struct branch_info *new_branch_info)
 {
@@ -1575,27 +1629,46 @@ static int checkout_branch(struct checkout_opts *opts,
 	if (!opts->can_switch_when_in_progress)
 		die_if_some_operation_in_progress();
 
-	if (new_branch_info->path && !opts->force_detach && !opts->new_branch &&
-	    !opts->ignore_other_worktrees) {
-		int flag;
-		char *head_ref = resolve_refdup("HEAD", 0, NULL, &flag);
-		if (head_ref &&
-		    (!(flag & REF_ISSYMREF) || strcmp(head_ref, new_branch_info->path)))
-			die_if_checked_out(new_branch_info->path, 1);
-		free(head_ref);
+	/* "git checkout <branch>" */
+	if (new_branch_info->path && !opts->force_detach && !opts->new_branch)
+		die_if_switching_to_a_branch_in_use(opts, new_branch_info->path);
+
+	/* "git checkout -B <branch>" */
+	if (opts->new_branch_force) {
+		char *full_ref = xstrfmt("refs/heads/%s", opts->new_branch);
+		die_if_switching_to_a_branch_in_use(opts, full_ref);
+		free(full_ref);
 	}
 
 	if (!new_branch_info->commit && opts->new_branch) {
 		struct object_id rev;
 		int flag;
 
-		if (!read_ref_full("HEAD", 0, &rev, &flag) &&
+		if (!refs_read_ref_full(get_main_ref_store(the_repository), "HEAD", 0, &rev, &flag) &&
 		    (flag & REF_ISSYMREF) && is_null_oid(&rev))
 			return switch_unborn_to_new_branch(opts);
 	}
 	return switch_branches(opts, new_branch_info);
 }
 
+static int parse_opt_conflict(const struct option *o, const char *arg, int unset)
+{
+	struct checkout_opts *opts = o->value;
+
+	if (unset) {
+		opts->conflict_style = -1;
+		return 0;
+	}
+	opts->conflict_style = parse_conflict_style_name(arg);
+	if (opts->conflict_style < 0)
+		return error(_("unknown conflict style '%s'"), arg);
+	/* --conflict overrides a previous --no-merge */
+	if (!opts->merge)
+		opts->merge = -1;
+
+	return 0;
+}
+
 static struct option *add_common_options(struct checkout_opts *opts,
 					 struct option *prevopts)
 {
@@ -1606,8 +1679,9 @@ static struct option *add_common_options(struct checkout_opts *opts,
 			    PARSE_OPT_OPTARG, option_parse_recurse_submodules_worktree_updater),
 		OPT_BOOL(0, "progress", &opts->show_progress, N_("force progress reporting")),
 		OPT_BOOL('m', "merge", &opts->merge, N_("perform a 3-way merge with the new branch")),
-		OPT_STRING(0, "conflict", &opts->conflict_style, N_("style"),
-			   N_("conflict style (merge, diff3, or zdiff3)")),
+		OPT_CALLBACK(0, "conflict", opts, N_("style"),
+			     N_("conflict style (merge, diff3, or zdiff3)"),
+			     parse_opt_conflict),
 		OPT_END()
 	};
 	struct option *newopts = parse_options_concat(prevopts, options);
@@ -1666,10 +1740,11 @@ static char cb_option = 'b';
 
 static int checkout_main(int argc, const char **argv, const char *prefix,
 			 struct checkout_opts *opts, struct option *options,
-			 const char * const usagestr[],
-			 struct branch_info *new_branch_info)
+			 const char * const usagestr[])
 {
 	int parseopt_flags = 0;
+	struct branch_info new_branch_info = { 0 };
+	int ret;
 
 	opts->overwrite_ignore = 1;
 	opts->prefix = prefix;
@@ -1698,15 +1773,10 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 			opts->show_progress = isatty(2);
 	}
 
-	if (opts->conflict_style) {
-		struct key_value_info kvi = KVI_INIT;
-		struct config_context ctx = {
-			.kvi = &kvi,
-		};
-		opts->merge = 1; /* implied */
-		git_xmerge_config("merge.conflictstyle", opts->conflict_style,
-				  &ctx, NULL);
-	}
+	/* --conflicts implies --merge */
+	if (opts->merge == -1)
+		opts->merge = opts->conflict_style >= 0;
+
 	if (opts->force) {
 		opts->discard_changes = 1;
 		opts->ignore_unmerged_opt = "--force";
@@ -1785,7 +1855,7 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 			opts->track == BRANCH_TRACK_UNSPECIFIED &&
 			!opts->new_branch;
 		int n = parse_branchname_arg(argc, argv, dwim_ok,
-					     new_branch_info, opts, &rev);
+					     &new_branch_info, opts, &rev);
 		argv += n;
 		argc -= n;
 	} else if (!opts->accept_ref && opts->from_treeish) {
@@ -1794,7 +1864,7 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 		if (repo_get_oid_mb(the_repository, opts->from_treeish, &rev))
 			die(_("could not resolve %s"), opts->from_treeish);
 
-		setup_new_branch_info_and_source_tree(new_branch_info,
+		setup_new_branch_info_and_source_tree(&new_branch_info,
 						      opts, &rev,
 						      opts->from_treeish);
 
@@ -1814,7 +1884,7 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 		 * Try to give more helpful suggestion.
 		 * new_branch && argc > 1 will be caught later.
 		 */
-		if (opts->new_branch && argc == 1 && !new_branch_info->commit)
+		if (opts->new_branch && argc == 1 && !new_branch_info.commit)
 			die(_("'%s' is not a commit and a branch '%s' cannot be created from it"),
 				argv[0], opts->new_branch);
 
@@ -1864,14 +1934,21 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 	}
 
 	if (opts->patch_mode || opts->pathspec.nr)
-		return checkout_paths(opts, new_branch_info);
+		ret = checkout_paths(opts, &new_branch_info);
 	else
-		return checkout_branch(opts, new_branch_info);
+		ret = checkout_branch(opts, &new_branch_info);
+
+	branch_info_release(&new_branch_info);
+	clear_pathspec(&opts->pathspec);
+	free(opts->pathspec_from_file);
+	free(options);
+
+	return ret;
 }
 
 int cmd_checkout(int argc, const char **argv, const char *prefix)
 {
-	struct checkout_opts opts;
+	struct checkout_opts opts = CHECKOUT_OPTS_INIT;
 	struct option *options;
 	struct option checkout_options[] = {
 		OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
@@ -1884,10 +1961,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "overlay", &opts.overlay_mode, N_("use overlay mode (default)")),
 		OPT_END()
 	};
-	int ret;
-	struct branch_info new_branch_info = { 0 };
 
-	memset(&opts, 0, sizeof(opts));
 	opts.dwim_new_local_branch = 1;
 	opts.switch_branch_doing_nothing_is_ok = 1;
 	opts.only_merge_on_switching_branches = 0;
@@ -1915,18 +1989,13 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 	options = add_common_switch_branch_options(&opts, options);
 	options = add_checkout_path_options(&opts, options);
 
-	ret = checkout_main(argc, argv, prefix, &opts,
-			    options, checkout_usage, &new_branch_info);
-	branch_info_release(&new_branch_info);
-	clear_pathspec(&opts.pathspec);
-	free(opts.pathspec_from_file);
-	FREE_AND_NULL(options);
-	return ret;
+	return checkout_main(argc, argv, prefix, &opts, options,
+			     checkout_usage);
 }
 
 int cmd_switch(int argc, const char **argv, const char *prefix)
 {
-	struct checkout_opts opts;
+	struct checkout_opts opts = CHECKOUT_OPTS_INIT;
 	struct option *options = NULL;
 	struct option switch_options[] = {
 		OPT_STRING('c', "create", &opts.new_branch, N_("branch"),
@@ -1939,10 +2008,7 @@ int cmd_switch(int argc, const char **argv, const char *prefix)
 			 N_("throw away local modifications")),
 		OPT_END()
 	};
-	int ret;
-	struct branch_info new_branch_info = { 0 };
 
-	memset(&opts, 0, sizeof(opts));
 	opts.dwim_new_local_branch = 1;
 	opts.accept_ref = 1;
 	opts.accept_pathspec = 0;
@@ -1959,16 +2025,13 @@ int cmd_switch(int argc, const char **argv, const char *prefix)
 
 	cb_option = 'c';
 
-	ret = checkout_main(argc, argv, prefix, &opts,
-			    options, switch_branch_usage, &new_branch_info);
-	branch_info_release(&new_branch_info);
-	FREE_AND_NULL(options);
-	return ret;
+	return checkout_main(argc, argv, prefix, &opts, options,
+			     switch_branch_usage);
 }
 
 int cmd_restore(int argc, const char **argv, const char *prefix)
 {
-	struct checkout_opts opts;
+	struct checkout_opts opts = CHECKOUT_OPTS_INIT;
 	struct option *options;
 	struct option restore_options[] = {
 		OPT_STRING('s', "source", &opts.from_treeish, "<tree-ish>",
@@ -1982,10 +2045,7 @@ int cmd_restore(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "overlay", &opts.overlay_mode, N_("use overlay mode")),
 		OPT_END()
 	};
-	int ret;
-	struct branch_info new_branch_info = { 0 };
 
-	memset(&opts, 0, sizeof(opts));
 	opts.accept_ref = 0;
 	opts.accept_pathspec = 1;
 	opts.empty_pathspec_ok = 0;
@@ -1998,9 +2058,6 @@ int cmd_restore(int argc, const char **argv, const char *prefix)
 	options = add_common_options(&opts, options);
 	options = add_checkout_path_options(&opts, options);
 
-	ret = checkout_main(argc, argv, prefix, &opts,
-			    options, restore_usage, &new_branch_info);
-	branch_info_release(&new_branch_info);
-	FREE_AND_NULL(options);
-	return ret;
+	return checkout_main(argc, argv, prefix, &opts, options,
+			     restore_usage);
 }
diff --git a/builtin/clean.c b/builtin/clean.c
index d90766c..ded5a91 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -6,7 +6,6 @@
  * Based on git-clean.sh by Pavel Roskin
  */
 
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "abspath.h"
 #include "config.h"
@@ -25,7 +24,7 @@
 #include "help.h"
 #include "prompt.h"
 
-static int force = -1; /* unset */
+static int require_force = -1; /* unset */
 static int interactive;
 static struct string_list del_list = STRING_LIST_INIT_DUP;
 static unsigned int colopts;
@@ -128,7 +127,7 @@ static int git_clean_config(const char *var, const char *value,
 	}
 
 	if (!strcmp(var, "clean.requireforce")) {
-		force = !git_config_bool(var, value);
+		require_force = git_config_bool(var, value);
 		return 0;
 	}
 
@@ -714,7 +713,7 @@ static int filter_by_patterns_cmd(void)
 		for_each_string_list_item(item, &del_list) {
 			int dtype = DT_UNKNOWN;
 
-			if (is_excluded(&dir, &the_index, item->string, &dtype)) {
+			if (is_excluded(&dir, the_repository->index, item->string, &dtype)) {
 				*item->string = '\0';
 				changed++;
 			}
@@ -920,7 +919,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 {
 	int i, res;
 	int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
-	int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
+	int ignored_only = 0, force = 0, errors = 0, gone = 1;
 	int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
 	struct strbuf abs_path = STRBUF_INIT;
 	struct dir_struct dir = DIR_INIT;
@@ -946,22 +945,12 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	};
 
 	git_config(git_clean_config, NULL);
-	if (force < 0)
-		force = 0;
-	else
-		config_set = 1;
 
 	argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 			     0);
 
-	if (!interactive && !dry_run && !force) {
-		if (config_set)
-			die(_("clean.requireForce set to true and neither -i, -n, nor -f given; "
-				  "refusing to clean"));
-		else
-			die(_("clean.requireForce defaults to true and neither -i, -n, nor -f given;"
-				  " refusing to clean"));
-	}
+	if (require_force != 0 && !force && !interactive && !dry_run)
+		die(_("clean.requireForce is true and -f not given: refusing to clean"));
 
 	if (force > 1)
 		rm_flags = 0;
@@ -1031,7 +1020,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		       PATHSPEC_PREFER_CWD,
 		       prefix, argv);
 
-	fill_directory(&dir, &the_index, &pathspec);
+	fill_directory(&dir, the_repository->index, &pathspec);
 	correct_untracked_entries(&dir);
 
 	for (i = 0; i < dir.nr; i++) {
@@ -1039,7 +1028,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		struct stat st;
 		const char *rel;
 
-		if (!index_name_is_other(&the_index, ent->name, ent->len))
+		if (!index_name_is_other(the_repository->index, ent->name, ent->len))
 			continue;
 
 		if (lstat(ent->name, &st))
diff --git a/builtin/clone.c b/builtin/clone.c
index 40cfac4..b89ca92 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -8,7 +8,6 @@
  * Clone a repository into a different directory that does not yet exist.
  */
 
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "abspath.h"
 #include "advice.h"
@@ -71,6 +70,7 @@ static char *remote_name = NULL;
 static char *option_branch = NULL;
 static struct string_list option_not = STRING_LIST_INIT_NODUP;
 static const char *real_git_dir;
+static const char *ref_format;
 static char *option_upload_pack = "git-upload-pack";
 static int option_verbosity;
 static int option_progress = -1;
@@ -115,7 +115,7 @@ static struct option builtin_clone_options[] = {
 	OPT_HIDDEN_BOOL(0, "naked", &option_bare,
 			N_("create a bare repository")),
 	OPT_BOOL(0, "mirror", &option_mirror,
-		 N_("create a mirror repository (implies bare)")),
+		 N_("create a mirror repository (implies --bare)")),
 	OPT_BOOL('l', "local", &option_local,
 		N_("to clone from a local repository")),
 	OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
@@ -156,6 +156,8 @@ static struct option builtin_clone_options[] = {
 		    N_("any cloned submodules will be shallow")),
 	OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
 		   N_("separate git dir from working tree")),
+	OPT_STRING(0, "ref-format", &ref_format, N_("format"),
+		   N_("specify the reference format to use")),
 	OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
 			N_("set config inside the new repository")),
 	OPT_STRING_LIST(0, "server-option", &server_options,
@@ -565,7 +567,8 @@ static void write_remote_refs(const struct ref *local_refs)
 	struct ref_transaction *t;
 	struct strbuf err = STRBUF_INIT;
 
-	t = ref_transaction_begin(&err);
+	t = ref_store_transaction_begin(get_main_ref_store(the_repository),
+					&err);
 	if (!t)
 		die("%s", err.buf);
 
@@ -596,8 +599,9 @@ static void write_followtags(const struct ref *refs, const char *msg)
 						     OBJECT_INFO_QUICK |
 						     OBJECT_INFO_SKIP_FETCH_OBJECT))
 			continue;
-		update_ref(msg, ref->name, &ref->old_oid, NULL, 0,
-			   UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository), msg,
+				ref->name, &ref->old_oid, NULL, 0,
+				UPDATE_REFS_DIE_ON_ERR);
 	}
 }
 
@@ -649,9 +653,9 @@ static void update_remote_refs(const struct ref *refs,
 		struct strbuf head_ref = STRBUF_INIT;
 		strbuf_addstr(&head_ref, branch_top);
 		strbuf_addstr(&head_ref, "HEAD");
-		if (create_symref(head_ref.buf,
-				  remote_head_points_at->peer_ref->name,
-				  msg) < 0)
+		if (refs_update_symref(get_main_ref_store(the_repository), head_ref.buf,
+				       remote_head_points_at->peer_ref->name,
+				       msg) < 0)
 			die(_("unable to update %s"), head_ref.buf);
 		strbuf_release(&head_ref);
 	}
@@ -663,33 +667,36 @@ static void update_head(const struct ref *our, const struct ref *remote,
 	const char *head;
 	if (our && skip_prefix(our->name, "refs/heads/", &head)) {
 		/* Local default branch link */
-		if (create_symref("HEAD", our->name, NULL) < 0)
+		if (refs_update_symref(get_main_ref_store(the_repository), "HEAD", our->name, NULL) < 0)
 			die(_("unable to update HEAD"));
 		if (!option_bare) {
-			update_ref(msg, "HEAD", &our->old_oid, NULL, 0,
-				   UPDATE_REFS_DIE_ON_ERR);
+			refs_update_ref(get_main_ref_store(the_repository),
+					msg, "HEAD", &our->old_oid, NULL, 0,
+					UPDATE_REFS_DIE_ON_ERR);
 			install_branch_config(0, head, remote_name, our->name);
 		}
 	} else if (our) {
 		struct commit *c = lookup_commit_reference(the_repository,
 							   &our->old_oid);
 		/* --branch specifies a non-branch (i.e. tags), detach HEAD */
-		update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF,
-			   UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository), msg,
+				"HEAD", &c->object.oid, NULL, REF_NO_DEREF,
+				UPDATE_REFS_DIE_ON_ERR);
 	} else if (remote) {
 		/*
 		 * We know remote HEAD points to a non-branch, or
 		 * HEAD points to a branch but we don't know which one.
 		 * Detach HEAD in all these cases.
 		 */
-		update_ref(msg, "HEAD", &remote->old_oid, NULL, REF_NO_DEREF,
-			   UPDATE_REFS_DIE_ON_ERR);
+		refs_update_ref(get_main_ref_store(the_repository), msg,
+				"HEAD", &remote->old_oid, NULL, REF_NO_DEREF,
+				UPDATE_REFS_DIE_ON_ERR);
 	} else if (unborn && skip_prefix(unborn, "refs/heads/", &head)) {
 		/*
 		 * Unborn head from remote; same as "our" case above except
 		 * that we have no ref to update.
 		 */
-		if (create_symref("HEAD", unborn, NULL) < 0)
+		if (refs_update_symref(get_main_ref_store(the_repository), "HEAD", unborn, NULL) < 0)
 			die(_("unable to update HEAD"));
 		if (!option_bare)
 			install_branch_config(0, head, remote_name, unborn);
@@ -730,7 +737,8 @@ static int checkout(int submodule_progress, int filter_submodules)
 	if (option_no_checkout)
 		return 0;
 
-	head = resolve_refdup("HEAD", RESOLVE_REF_READING, &oid, NULL);
+	head = refs_resolve_refdup(get_main_ref_store(the_repository), "HEAD",
+				   RESOLVE_REF_READING, &oid, NULL);
 	if (!head) {
 		warning(_("remote HEAD refers to nonexistent ref, "
 			  "unable to checkout"));
@@ -757,21 +765,22 @@ static int checkout(int submodule_progress, int filter_submodules)
 	opts.preserve_ignored = 0;
 	opts.fn = oneway_merge;
 	opts.verbose_update = (option_verbosity >= 0);
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
+	opts.src_index = the_repository->index;
+	opts.dst_index = the_repository->index;
 	init_checkout_metadata(&opts.meta, head, &oid, NULL);
 
 	tree = parse_tree_indirect(&oid);
 	if (!tree)
 		die(_("unable to parse commit %s"), oid_to_hex(&oid));
-	parse_tree(tree);
-	init_tree_desc(&t, tree->buffer, tree->size);
+	if (parse_tree(tree) < 0)
+		exit(128);
+	init_tree_desc(&t, &tree->object.oid, tree->buffer, tree->size);
 	if (unpack_trees(1, &t, &opts) < 0)
 		die(_("unable to checkout working tree"));
 
 	free(head);
 
-	if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+	if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
 	err |= run_hooks_l("post-checkout", oid_to_hex(null_oid()),
@@ -952,6 +961,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	struct ref *mapped_refs = NULL;
 	const struct ref *ref;
 	struct strbuf key = STRBUF_INIT;
+	struct strbuf buf = STRBUF_INIT;
 	struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
 	struct transport *transport = NULL;
 	const char *src_ref_prefix = "refs/heads/";
@@ -960,6 +970,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	int submodule_progress;
 	int filter_submodules = 0;
 	int hash_algo;
+	enum ref_storage_format ref_storage_format = REF_STORAGE_FORMAT_UNKNOWN;
 	const int do_not_override_repo_unix_permissions = -1;
 
 	struct transport_ls_refs_options transport_ls_refs_options =
@@ -985,6 +996,12 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (option_single_branch == -1)
 		option_single_branch = deepen ? 1 : 0;
 
+	if (ref_format) {
+		ref_storage_format = ref_storage_format_by_name(ref_format);
+		if (ref_storage_format == REF_STORAGE_FORMAT_UNKNOWN)
+			die(_("unknown ref storage format '%s'"), ref_format);
+	}
+
 	if (option_mirror)
 		option_bare = 1;
 
@@ -1129,8 +1146,15 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		}
 	}
 
-	init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN, NULL,
-		do_not_override_repo_unix_permissions, INIT_DB_QUIET);
+	/*
+	 * Initialize the repository, but skip initializing the reference
+	 * database. We do not yet know about the object format of the
+	 * repository, and reference backends may persist that information into
+	 * their on-disk data structures.
+	 */
+	init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN,
+		ref_storage_format, NULL,
+		do_not_override_repo_unix_permissions, INIT_DB_QUIET | INIT_DB_SKIP_REFDB);
 
 	if (real_git_dir) {
 		free((char *)git_dir);
@@ -1138,6 +1162,50 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	}
 
 	/*
+	 * We have a chicken-and-egg situation between initializing the refdb
+	 * and spawning transport helpers:
+	 *
+	 *   - Initializing the refdb requires us to know about the object
+	 *     format. We thus have to spawn the transport helper to learn
+	 *     about it.
+	 *
+	 *   - The transport helper may want to access the Git repository. But
+	 *     because the refdb has not been initialized, we don't have "HEAD"
+	 *     or "refs/". Thus, the helper cannot find the Git repository.
+	 *
+	 * Ideally, we would have structured the helper protocol such that it's
+	 * mandatory for the helper to first announce its capabilities without
+	 * yet assuming a fully initialized repository. Like that, we could
+	 * have added a "lazy-refdb-init" capability that announces whether the
+	 * helper is ready to handle not-yet-initialized refdbs. If any helper
+	 * didn't support them, we would have fully initialized the refdb with
+	 * the SHA1 object format, but later on bailed out if we found out that
+	 * the remote repository used a different object format.
+	 *
+	 * But we didn't, and thus we use the following workaround to partially
+	 * initialize the repository's refdb such that it can be discovered by
+	 * Git commands. To do so, we:
+	 *
+	 *   - Create an invalid HEAD ref pointing at "refs/heads/.invalid".
+	 *
+	 *   - Create the "refs/" directory.
+	 *
+	 *   - Set up the ref storage format and repository version as
+	 *     required.
+	 *
+	 * This is sufficient for Git commands to discover the Git directory.
+	 */
+	initialize_repository_version(GIT_HASH_UNKNOWN,
+				      the_repository->ref_storage_format, 1);
+
+	strbuf_addf(&buf, "%s/HEAD", git_dir);
+	write_file(buf.buf, "ref: refs/heads/.invalid");
+
+	strbuf_reset(&buf);
+	strbuf_addf(&buf, "%s/refs", git_dir);
+	safe_create_dir(buf.buf, 1);
+
+	/*
 	 * additional config can be injected with -c, make sure it's included
 	 * after init_db, which clears the entire config environment.
 	 */
@@ -1217,10 +1285,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (option_required_reference.nr || option_optional_reference.nr)
 		setup_reference();
 
-	if (option_sparse_checkout && git_sparse_checkout_init(dir))
-		return 1;
-
-	remote = remote_get(remote_name);
+	remote = remote_get_early(remote_name);
 
 	refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix,
 			branch_top.buf);
@@ -1298,6 +1363,27 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (transport->smart_options && !deepen && !filter_options.choice)
 		transport->smart_options->check_self_contained_and_connected = 1;
 
+	strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD");
+	refspec_ref_prefixes(&remote->fetch,
+			     &transport_ls_refs_options.ref_prefixes);
+	if (option_branch)
+		expand_ref_prefix(&transport_ls_refs_options.ref_prefixes,
+				  option_branch);
+	if (!option_no_tags)
+		strvec_push(&transport_ls_refs_options.ref_prefixes,
+			    "refs/tags/");
+
+	refs = transport_get_remote_refs(transport, &transport_ls_refs_options);
+
+	/*
+	 * Now that we know what algorithm the remote side is using, let's set
+	 * ours to the same thing.
+	 */
+	hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
+	initialize_repository_version(hash_algo, the_repository->ref_storage_format, 1);
+	repo_set_hash_algo(the_repository, hash_algo);
+	create_reference_database(the_repository->ref_storage_format, NULL, 1);
+
 	/*
 	 * Before fetching from the remote, download and install bundle
 	 * data from the --bundle-uri option.
@@ -1313,24 +1399,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 				bundle_uri);
 		else if (has_heuristic)
 			git_config_set_gently("fetch.bundleuri", bundle_uri);
-	}
-
-	strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD");
-	refspec_ref_prefixes(&remote->fetch,
-			     &transport_ls_refs_options.ref_prefixes);
-	if (option_branch)
-		expand_ref_prefix(&transport_ls_refs_options.ref_prefixes,
-				  option_branch);
-	if (!option_no_tags)
-		strvec_push(&transport_ls_refs_options.ref_prefixes,
-			    "refs/tags/");
-
-	refs = transport_get_remote_refs(transport, &transport_ls_refs_options);
-
-	if (refs)
-		mapped_refs = wanted_peer_refs(refs, &remote->fetch);
-
-	if (!bundle_uri) {
+	} else {
 		/*
 		* Populate transport->got_remote_bundle_uri and
 		* transport->bundle_uri. We might get nothing.
@@ -1351,13 +1420,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		}
 	}
 
-		/*
-		 * Now that we know what algorithm the remote side is using,
-		 * let's set ours to the same thing.
-		 */
-	hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
-	initialize_repository_version(hash_algo, 1);
-	repo_set_hash_algo(the_repository, hash_algo);
+	if (refs)
+		mapped_refs = wanted_peer_refs(refs, &remote->fetch);
 
 	if (mapped_refs) {
 		/*
@@ -1395,6 +1459,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	} else if (remote_head) {
 		our_head_points_at = NULL;
 	} else {
+		char *to_free = NULL;
 		const char *branch;
 
 		if (!mapped_refs) {
@@ -1407,7 +1472,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 				"refs/heads/", &branch)) {
 			unborn_head  = xstrdup(transport_ls_refs_options.unborn_head_target);
 		} else {
-			branch = git_default_branch_name(0);
+			branch = to_free = repo_default_branch_name(the_repository, 0);
 			unborn_head = xstrfmt("refs/heads/%s", branch);
 		}
 
@@ -1423,6 +1488,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		 * a match.
 		 */
 		our_head_points_at = find_remote_branch(mapped_refs, branch);
+
+		free(to_free);
 	}
 
 	write_refspec_config(src_ref_prefix, our_head_points_at,
@@ -1460,12 +1527,16 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		dissociate_from_references();
 	}
 
+	if (option_sparse_checkout && git_sparse_checkout_init(dir))
+		return 1;
+
 	junk_mode = JUNK_LEAVE_REPO;
 	err = checkout(submodule_progress, filter_submodules);
 
 	free(remote_name);
 	strbuf_release(&reflog_msg);
 	strbuf_release(&branch_top);
+	strbuf_release(&buf);
 	strbuf_release(&key);
 	free_refs(mapped_refs);
 	free_refs(remote_head_points_at);
diff --git a/builtin/column.c b/builtin/column.c
index e80218f..10ff7e0 100644
--- a/builtin/column.c
+++ b/builtin/column.c
@@ -45,6 +45,8 @@ int cmd_column(int argc, const char **argv, const char *prefix)
 	memset(&copts, 0, sizeof(copts));
 	copts.padding = 1;
 	argc = parse_options(argc, argv, prefix, options, builtin_column_usage, 0);
+	if (copts.padding < 0)
+		die(_("%s must be non-negative"), "--padding");
 	if (argc)
 		usage_with_options(builtin_column_usage, options);
 	if (real_command || command) {
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 666ad57..7102ee9 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -21,7 +21,7 @@
 	N_("git commit-graph write [--object-dir <dir>] [--append]\n" \
 	   "                       [--split[=<strategy>]] [--reachable | --stdin-packs | --stdin-commits]\n" \
 	   "                       [--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress]\n" \
-	   "                       <split options>")
+	   "                       <split-options>")
 
 static const char * builtin_commit_graph_verify_usage[] = {
 	BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
diff --git a/builtin/commit.c b/builtin/commit.c
index 65196a2..f53e7e8 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -5,7 +5,6 @@
  * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
  */
 
-#define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "advice.h"
 #include "config.h"
@@ -38,6 +37,7 @@
 #include "commit-reach.h"
 #include "commit-graph.h"
 #include "pretty.h"
+#include "trailer.h"
 
 static const char * const builtin_commit_usage[] = {
 	N_("git commit [-a | --interactive | --patch] [-s] [-v] [-u<mode>] [--amend]\n"
@@ -107,7 +107,7 @@ static enum {
 } commit_style;
 
 static const char *logfile, *force_author;
-static const char *template_file;
+static char *template_file;
 /*
  * The _message variables are commit names from which to take
  * the commit message and/or authorship.
@@ -133,7 +133,7 @@ static struct strvec trailer_args = STRVEC_INIT;
  * is specified explicitly.
  */
 static enum commit_msg_cleanup_mode cleanup_mode;
-static const char *cleanup_arg;
+static char *cleanup_arg;
 
 static enum commit_whence whence;
 static int use_editor = 1, include_status = 1;
@@ -142,14 +142,6 @@ static struct strbuf message = STRBUF_INIT;
 
 static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
 
-static int opt_pass_trailer(const struct option *opt, const char *arg, int unset)
-{
-	BUG_ON_OPT_NEG(unset);
-
-	strvec_pushl(opt->value, "--trailer", arg, NULL);
-	return 0;
-}
-
 static int opt_parse_porcelain(const struct option *opt, const char *arg, int unset)
 {
 	enum wt_status_format *value = (enum wt_status_format *)opt->value;
@@ -266,19 +258,19 @@ static int list_paths(struct string_list *list, const char *with_tree,
 
 	if (with_tree) {
 		char *max_prefix = common_prefix(pattern);
-		overlay_tree_on_index(&the_index, with_tree, max_prefix);
+		overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
 		free(max_prefix);
 	}
 
 	/* TODO: audit for interaction with sparse-index. */
-	ensure_full_index(&the_index);
-	for (i = 0; i < the_index.cache_nr; i++) {
-		const struct cache_entry *ce = the_index.cache[i];
+	ensure_full_index(the_repository->index);
+	for (i = 0; i < the_repository->index->cache_nr; i++) {
+		const struct cache_entry *ce = the_repository->index->cache[i];
 		struct string_list_item *item;
 
 		if (ce->ce_flags & CE_UPDATE)
 			continue;
-		if (!ce_path_match(&the_index, ce, pattern, m))
+		if (!ce_path_match(the_repository->index, ce, pattern, m))
 			continue;
 		item = string_list_insert(list, ce->name);
 		if (ce_skip_worktree(ce))
@@ -302,10 +294,10 @@ static void add_remove_files(struct string_list *list)
 			continue;
 
 		if (!lstat(p->string, &st)) {
-			if (add_to_index(&the_index, p->string, &st, 0))
+			if (add_to_index(the_repository->index, p->string, &st, 0))
 				die(_("updating files failed"));
 		} else
-			remove_file_from_index(&the_index, p->string);
+			remove_file_from_index(the_repository->index, p->string);
 	}
 }
 
@@ -316,7 +308,7 @@ static void create_base_index(const struct commit *current_head)
 	struct tree_desc t;
 
 	if (!current_head) {
-		discard_index(&the_index);
+		discard_index(the_repository->index);
 		return;
 	}
 
@@ -324,15 +316,16 @@ static void create_base_index(const struct commit *current_head)
 	opts.head_idx = 1;
 	opts.index_only = 1;
 	opts.merge = 1;
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
+	opts.src_index = the_repository->index;
+	opts.dst_index = the_repository->index;
 
 	opts.fn = oneway_merge;
 	tree = parse_tree_indirect(&current_head->object.oid);
 	if (!tree)
 		die(_("failed to unpack HEAD tree object"));
-	parse_tree(tree);
-	init_tree_desc(&t, tree->buffer, tree->size);
+	if (parse_tree(tree) < 0)
+		exit(128);
+	init_tree_desc(&t, &tree->object.oid, tree->buffer, tree->size);
 	if (unpack_trees(1, &t, &opts))
 		exit(128); /* We've already reported the error, finish dying */
 }
@@ -343,7 +336,7 @@ static void refresh_cache_or_die(int refresh_flags)
 	 * refresh_flags contains REFRESH_QUIET, so the only errors
 	 * are for unmerged entries.
 	 */
-	if (refresh_index(&the_index, refresh_flags | REFRESH_IN_PORCELAIN, NULL, NULL, NULL))
+	if (refresh_index(the_repository->index, refresh_flags | REFRESH_IN_PORCELAIN, NULL, NULL, NULL))
 		die_resolve_conflict("commit");
 }
 
@@ -392,7 +385,7 @@ static const char *prepare_index(const char **argv, const char *prefix,
 
 		refresh_cache_or_die(refresh_flags);
 
-		if (write_locked_index(&the_index, &index_lock, 0))
+		if (write_locked_index(the_repository->index, &index_lock, 0))
 			die(_("unable to create temporary index"));
 
 		old_repo_index_file = the_repository->index_file;
@@ -411,13 +404,13 @@ static const char *prepare_index(const char **argv, const char *prefix,
 			unsetenv(INDEX_ENVIRONMENT);
 		FREE_AND_NULL(old_index_env);
 
-		discard_index(&the_index);
-		read_index_from(&the_index, get_lock_file_path(&index_lock),
+		discard_index(the_repository->index);
+		read_index_from(the_repository->index, get_lock_file_path(&index_lock),
 				get_git_dir());
-		if (cache_tree_update(&the_index, WRITE_TREE_SILENT) == 0) {
+		if (cache_tree_update(the_repository->index, WRITE_TREE_SILENT) == 0) {
 			if (reopen_lock_file(&index_lock) < 0)
 				die(_("unable to write index file"));
-			if (write_locked_index(&the_index, &index_lock, 0))
+			if (write_locked_index(the_repository->index, &index_lock, 0))
 				die(_("unable to update temporary index"));
 		} else
 			warning(_("Failed to update main cache tree"));
@@ -440,16 +433,21 @@ static const char *prepare_index(const char **argv, const char *prefix,
 	 * (B) on failure, rollback the real index.
 	 */
 	if (all || (also && pathspec.nr)) {
+		char *ps_matched = xcalloc(pathspec.nr, 1);
 		repo_hold_locked_index(the_repository, &index_lock,
 				       LOCK_DIE_ON_ERROR);
 		add_files_to_cache(the_repository, also ? prefix : NULL,
-				   &pathspec, 0, 0);
+				   &pathspec, ps_matched, 0, 0);
+		if (!all && report_path_error(ps_matched, &pathspec))
+			exit(128);
+
 		refresh_cache_or_die(refresh_flags);
-		cache_tree_update(&the_index, WRITE_TREE_SILENT);
-		if (write_locked_index(&the_index, &index_lock, 0))
+		cache_tree_update(the_repository->index, WRITE_TREE_SILENT);
+		if (write_locked_index(the_repository->index, &index_lock, 0))
 			die(_("unable to write new index file"));
 		commit_style = COMMIT_NORMAL;
 		ret = get_lock_file_path(&index_lock);
+		free(ps_matched);
 		goto out;
 	}
 
@@ -466,10 +464,10 @@ static const char *prepare_index(const char **argv, const char *prefix,
 		repo_hold_locked_index(the_repository, &index_lock,
 				       LOCK_DIE_ON_ERROR);
 		refresh_cache_or_die(refresh_flags);
-		if (the_index.cache_changed
-		    || !cache_tree_fully_valid(the_index.cache_tree))
-			cache_tree_update(&the_index, WRITE_TREE_SILENT);
-		if (write_locked_index(&the_index, &index_lock,
+		if (the_repository->index->cache_changed
+		    || !cache_tree_fully_valid(the_repository->index->cache_tree))
+			cache_tree_update(the_repository->index, WRITE_TREE_SILENT);
+		if (write_locked_index(the_repository->index, &index_lock,
 				       COMMIT_LOCK | SKIP_IF_UNCHANGED))
 			die(_("unable to write new index file"));
 		commit_style = COMMIT_AS_IS;
@@ -510,15 +508,15 @@ static const char *prepare_index(const char **argv, const char *prefix,
 	if (list_paths(&partial, !current_head ? NULL : "HEAD", &pathspec))
 		exit(1);
 
-	discard_index(&the_index);
+	discard_index(the_repository->index);
 	if (repo_read_index(the_repository) < 0)
 		die(_("cannot read the index"));
 
 	repo_hold_locked_index(the_repository, &index_lock, LOCK_DIE_ON_ERROR);
 	add_remove_files(&partial);
-	refresh_index(&the_index, REFRESH_QUIET, NULL, NULL, NULL);
-	cache_tree_update(&the_index, WRITE_TREE_SILENT);
-	if (write_locked_index(&the_index, &index_lock, 0))
+	refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL);
+	cache_tree_update(the_repository->index, WRITE_TREE_SILENT);
+	if (write_locked_index(the_repository->index, &index_lock, 0))
 		die(_("unable to write new index file"));
 
 	hold_lock_file_for_update(&false_lock,
@@ -528,14 +526,14 @@ static const char *prepare_index(const char **argv, const char *prefix,
 
 	create_base_index(current_head);
 	add_remove_files(&partial);
-	refresh_index(&the_index, REFRESH_QUIET, NULL, NULL, NULL);
+	refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL);
 
-	if (write_locked_index(&the_index, &false_lock, 0))
+	if (write_locked_index(the_repository->index, &false_lock, 0))
 		die(_("unable to write temporary index file"));
 
-	discard_index(&the_index);
+	discard_index(the_repository->index);
 	ret = get_lock_file_path(&false_lock);
-	read_index_from(&the_index, ret, get_git_dir());
+	read_index_from(the_repository->index, ret, get_git_dir());
 out:
 	string_list_clear(&partial, 0);
 	clear_pathspec(&pathspec);
@@ -684,9 +682,10 @@ static void adjust_comment_line_char(const struct strbuf *sb)
 	char *candidate;
 	const char *p;
 
-	comment_line_char = candidates[0];
-	if (!memchr(sb->buf, comment_line_char, sb->len))
+	if (!memchr(sb->buf, candidates[0], sb->len)) {
+		comment_line_str = xstrfmt("%c", candidates[0]);
 		return;
+	}
 
 	p = sb->buf;
 	candidate = strchr(candidates, *p);
@@ -705,7 +704,7 @@ static void adjust_comment_line_char(const struct strbuf *sb)
 	if (!*p)
 		die(_("unable to select a comment character that is not used\n"
 		      "in the current commit message"));
-	comment_line_char = *p;
+	comment_line_str = xstrfmt("%c", *p);
 }
 
 static void prepare_amend_commit(struct commit *commit, struct strbuf *sb,
@@ -737,7 +736,6 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	const char *hook_arg2 = NULL;
 	int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
 	int old_display_comment_prefix;
-	int merge_contains_scissors = 0;
 	int invoked_hook;
 
 	/* This checks and barfs if author is badly specified */
@@ -841,7 +839,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		    wt_status_locate_end(sb.buf + merge_msg_start,
 					 sb.len - merge_msg_start) <
 				sb.len - merge_msg_start)
-			merge_contains_scissors = 1;
+			s->added_cut_line = 1;
 	} else if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
 		if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
 			die_errno(_("could not read SQUASH_MSG"));
@@ -889,7 +887,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	s->hints = 0;
 
 	if (clean_message_contents)
-		strbuf_stripspace(&sb, '\0');
+		strbuf_stripspace(&sb, NULL);
 
 	if (signoff)
 		append_signoff(&sb, ignored_log_message_bytes(sb.buf, sb.len), 0);
@@ -909,24 +907,23 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		struct ident_split ci, ai;
 		const char *hint_cleanup_all = allow_empty_message ?
 			_("Please enter the commit message for your changes."
-			  " Lines starting\nwith '%c' will be ignored.\n") :
+			  " Lines starting\nwith '%s' will be ignored.\n") :
 			_("Please enter the commit message for your changes."
-			  " Lines starting\nwith '%c' will be ignored, and an empty"
+			  " Lines starting\nwith '%s' will be ignored, and an empty"
 			  " message aborts the commit.\n");
 		const char *hint_cleanup_space = allow_empty_message ?
 			_("Please enter the commit message for your changes."
 			  " Lines starting\n"
-			  "with '%c' will be kept; you may remove them"
+			  "with '%s' will be kept; you may remove them"
 			  " yourself if you want to.\n") :
 			_("Please enter the commit message for your changes."
 			  " Lines starting\n"
-			  "with '%c' will be kept; you may remove them"
+			  "with '%s' will be kept; you may remove them"
 			  " yourself if you want to.\n"
 			  "An empty message aborts the commit.\n");
 		if (whence != FROM_COMMIT) {
-			if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
-				!merge_contains_scissors)
-				wt_status_add_cut_line(s->fp);
+			if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
+				wt_status_add_cut_line(s);
 			status_printf_ln(
 				s, GIT_COLOR_NORMAL,
 				whence == FROM_MERGE ?
@@ -944,12 +941,12 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 
 		fprintf(s->fp, "\n");
 		if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
-			status_printf(s, GIT_COLOR_NORMAL, hint_cleanup_all, comment_line_char);
+			status_printf(s, GIT_COLOR_NORMAL, hint_cleanup_all, comment_line_str);
 		else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS) {
-			if (whence == FROM_COMMIT && !merge_contains_scissors)
-				wt_status_add_cut_line(s->fp);
+			if (whence == FROM_COMMIT)
+				wt_status_add_cut_line(s);
 		} else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
-			status_printf(s, GIT_COLOR_NORMAL, hint_cleanup_space, comment_line_char);
+			status_printf(s, GIT_COLOR_NORMAL, hint_cleanup_space, comment_line_str);
 
 		/*
 		 * These should never fail because they come from our own
@@ -994,7 +991,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		struct object_id oid;
 		const char *parent = "HEAD";
 
-		if (!the_index.initialized && repo_read_index(the_repository) < 0)
+		if (!the_repository->index->initialized && repo_read_index(the_repository) < 0)
 			die(_("Cannot read index"));
 
 		if (amend)
@@ -1004,11 +1001,11 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 			int i, ita_nr = 0;
 
 			/* TODO: audit for interaction with sparse-index. */
-			ensure_full_index(&the_index);
-			for (i = 0; i < the_index.cache_nr; i++)
-				if (ce_intent_to_add(the_index.cache[i]))
+			ensure_full_index(the_repository->index);
+			for (i = 0; i < the_repository->index->cache_nr; i++)
+				if (ce_intent_to_add(the_repository->index->cache[i]))
 					ita_nr++;
-			committable = the_index.cache_nr - ita_nr > 0;
+			committable = the_repository->index->cache_nr - ita_nr > 0;
 		} else {
 			/*
 			 * Unless the user did explicitly request a submodule
@@ -1033,14 +1030,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	fclose(s->fp);
 
 	if (trailer_args.nr) {
-		struct child_process run_trailer = CHILD_PROCESS_INIT;
-
-		strvec_pushl(&run_trailer.args, "interpret-trailers",
-			     "--in-place", "--no-divider",
-			     git_path_commit_editmsg(), NULL);
-		strvec_pushv(&run_trailer.args, trailer_args.v);
-		run_trailer.git_cmd = 1;
-		if (run_command(&run_trailer))
+		if (amend_file_with_trailers(git_path_commit_editmsg(), &trailer_args))
 			die(_("unable to pass trailers to --trailers"));
 		strvec_clear(&trailer_args);
 	}
@@ -1076,11 +1066,11 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		 * and could have updated it. We must do this before we invoke
 		 * the editor and after we invoke run_status above.
 		 */
-		discard_index(&the_index);
+		discard_index(the_repository->index);
 	}
-	read_index_from(&the_index, index_file, get_git_dir());
+	read_index_from(the_repository->index, index_file, get_git_dir());
 
-	if (cache_tree_update(&the_index, 0)) {
+	if (cache_tree_update(the_repository->index, 0)) {
 		error(_("Error building trees"));
 		return 0;
 	}
@@ -1158,22 +1148,45 @@ static void handle_ignored_arg(struct wt_status *s)
 		die(_("Invalid ignored mode '%s'"), ignored_arg);
 }
 
-static void handle_untracked_files_arg(struct wt_status *s)
+static enum untracked_status_type parse_untracked_setting_name(const char *u)
 {
-	if (!untracked_files_arg)
-		; /* default already initialized */
-	else if (!strcmp(untracked_files_arg, "no"))
-		s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
-	else if (!strcmp(untracked_files_arg, "normal"))
-		s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-	else if (!strcmp(untracked_files_arg, "all"))
-		s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
 	/*
 	 * Please update $__git_untracked_file_modes in
 	 * git-completion.bash when you add new options
 	 */
+	switch (git_parse_maybe_bool(u)) {
+	case 0:
+		u = "no";
+		break;
+	case 1:
+		u = "normal";
+		break;
+	default:
+		break;
+	}
+
+	if (!strcmp(u, "no"))
+		return SHOW_NO_UNTRACKED_FILES;
+	else if (!strcmp(u, "normal"))
+		return SHOW_NORMAL_UNTRACKED_FILES;
+	else if (!strcmp(u, "all"))
+		return SHOW_ALL_UNTRACKED_FILES;
 	else
-		die(_("Invalid untracked files mode '%s'"), untracked_files_arg);
+		return SHOW_UNTRACKED_FILES_ERROR;
+}
+
+static void handle_untracked_files_arg(struct wt_status *s)
+{
+	enum untracked_status_type u;
+
+	if (!untracked_files_arg)
+		return; /* default already initialized */
+
+	u = parse_untracked_setting_name(untracked_files_arg);
+	if (u == SHOW_UNTRACKED_FILES_ERROR)
+		die(_("Invalid untracked files mode '%s'"),
+		    untracked_files_arg);
+	s->show_untracked_files = u;
 }
 
 static const char *read_commit_message(const char *name)
@@ -1456,16 +1469,12 @@ static int git_status_config(const char *k, const char *v,
 		return 0;
 	}
 	if (!strcmp(k, "status.showuntrackedfiles")) {
-		if (!v)
-			return config_error_nonbool(k);
-		else if (!strcmp(v, "no"))
-			s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
-		else if (!strcmp(v, "normal"))
-			s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-		else if (!strcmp(v, "all"))
-			s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
-		else
+		enum untracked_status_type u;
+
+		u = parse_untracked_setting_name(v);
+		if (u == SHOW_UNTRACKED_FILES_ERROR)
 			return error(_("Invalid untracked files mode '%s'"), v);
+		s->show_untracked_files = u;
 		return 0;
 	}
 	if (!strcmp(k, "diff.renamelimit")) {
@@ -1562,7 +1571,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 	    status_format != STATUS_FORMAT_PORCELAIN_V2)
 		progress_flag = REFRESH_PROGRESS;
 	repo_read_index(the_repository);
-	refresh_index(&the_index,
+	refresh_index(the_repository->index,
 		      REFRESH_QUIET|REFRESH_UNMERGED|progress_flag,
 		      &s.pathspec, NULL, NULL);
 
@@ -1649,7 +1658,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		OPT_STRING(0, "fixup", &fixup_message, N_("[(amend|reword):]commit"), N_("use autosquash formatted message to fixup or amend/reword specified commit")),
 		OPT_STRING(0, "squash", &squash_message, N_("commit"), N_("use autosquash formatted message to squash specified commit")),
 		OPT_BOOL(0, "reset-author", &renew_authorship, N_("the commit is authored by me now (used with -C/-c/--amend)")),
-		OPT_CALLBACK_F(0, "trailer", &trailer_args, N_("trailer"), N_("add custom trailer(s)"), PARSE_OPT_NONEG, opt_pass_trailer),
+		OPT_PASSTHRU_ARGV(0, "trailer", &trailer_args, N_("trailer"), N_("add custom trailer(s)"), PARSE_OPT_NONEG),
 		OPT_BOOL('s', "signoff", &signoff, N_("add a Signed-off-by trailer")),
 		OPT_FILENAME('t', "template", &template_file, N_("use specified template file")),
 		OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")),
@@ -1832,7 +1841,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, &the_index.cache_tree->oid,
+	if (commit_tree_extended(sb.buf, sb.len, &the_repository->index->cache_tree->oid,
 				 parents, &oid, author_ident.buf, NULL,
 				 sign_commit, extra)) {
 		rollback_index_files();
@@ -1877,7 +1886,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 				     &oid, flags);
 	}
 
-	apply_autostash(git_path_merge_autostash(the_repository));
+	apply_autostash_ref(the_repository, "MERGE_AUTOSTASH");
 
 cleanup:
 	strbuf_release(&author_ident);
diff --git a/builtin/config.c b/builtin/config.c
index 11a4d4e..20a0b64 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -16,58 +16,112 @@
 #include "worktree.h"
 
 static const char *const builtin_config_usage[] = {
-	N_("git config [<options>]"),
+	N_("git config list [<file-option>] [<display-option>] [--includes]"),
+	N_("git config get [<file-option>] [<display-option>] [--includes] [--all] [--regexp=<regexp>] [--value=<value>] [--fixed-value] [--default=<default>] <name>"),
+	N_("git config set [<file-option>] [--type=<type>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
+	N_("git config unset [<file-option>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
+	N_("git config rename-section [<file-option>] <old-name> <new-name>"),
+	N_("git config remove-section [<file-option>] <name>"),
+	N_("git config edit [<file-option>]"),
+	N_("git config [<file-option>] --get-colorbool <name> [<stdout-is-tty>]"),
 	NULL
 };
 
-static char *key;
-static regex_t *key_regexp;
-static const char *value_pattern;
-static regex_t *regexp;
-static int show_keys;
-static int omit_values;
-static int use_key_regexp;
-static int do_all;
-static int do_not_match;
-static char delim = '=';
-static char key_delim = ' ';
-static char term = '\n';
+static const char *const builtin_config_list_usage[] = {
+	N_("git config list [<file-option>] [<display-option>] [--includes]"),
+	NULL
+};
 
-static int use_global_config, use_system_config, use_local_config;
-static int use_worktree_config;
-static struct git_config_source given_config_source;
-static int actions, type;
-static char *default_value;
-static int end_nul;
-static int respect_includes_opt = -1;
-static struct config_options config_options;
-static int show_origin;
-static int show_scope;
-static int fixed_value;
+static const char *const builtin_config_get_usage[] = {
+	N_("git config get [<file-option>] [<display-option>] [--includes] [--all] [--regexp=<regexp>] [--value=<value>] [--fixed-value] [--default=<default>] <name>"),
+	NULL
+};
 
-#define ACTION_GET (1<<0)
-#define ACTION_GET_ALL (1<<1)
-#define ACTION_GET_REGEXP (1<<2)
-#define ACTION_REPLACE_ALL (1<<3)
-#define ACTION_ADD (1<<4)
-#define ACTION_UNSET (1<<5)
-#define ACTION_UNSET_ALL (1<<6)
-#define ACTION_RENAME_SECTION (1<<7)
-#define ACTION_REMOVE_SECTION (1<<8)
-#define ACTION_LIST (1<<9)
-#define ACTION_EDIT (1<<10)
-#define ACTION_SET (1<<11)
-#define ACTION_SET_ALL (1<<12)
-#define ACTION_GET_COLOR (1<<13)
-#define ACTION_GET_COLORBOOL (1<<14)
-#define ACTION_GET_URLMATCH (1<<15)
+static const char *const builtin_config_set_usage[] = {
+	N_("git config set [<file-option>] [--type=<type>] [--comment=<message>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
+	NULL
+};
 
-/*
- * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
- * one line of output and which should therefore be paged.
- */
-#define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
-			ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
+static const char *const builtin_config_unset_usage[] = {
+	N_("git config unset [<file-option>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
+	NULL
+};
+
+static const char *const builtin_config_rename_section_usage[] = {
+	N_("git config rename-section [<file-option>] <old-name> <new-name>"),
+	NULL
+};
+
+static const char *const builtin_config_remove_section_usage[] = {
+	N_("git config remove-section [<file-option>] <name>"),
+	NULL
+};
+
+static const char *const builtin_config_edit_usage[] = {
+	N_("git config edit [<file-option>]"),
+	NULL
+};
+
+#define CONFIG_LOCATION_OPTIONS(opts) \
+	OPT_GROUP(N_("Config file location")), \
+	OPT_BOOL(0, "global", &opts.use_global_config, N_("use global config file")), \
+	OPT_BOOL(0, "system", &opts.use_system_config, N_("use system config file")), \
+	OPT_BOOL(0, "local", &opts.use_local_config, N_("use repository config file")), \
+	OPT_BOOL(0, "worktree", &opts.use_worktree_config, N_("use per-worktree config file")), \
+	OPT_STRING('f', "file", &opts.source.file, N_("file"), N_("use given config file")), \
+	OPT_STRING(0, "blob", &opts.source.blob, N_("blob-id"), N_("read config from given blob object"))
+
+struct config_location_options {
+	struct git_config_source source;
+	struct config_options options;
+	char *file_to_free;
+	int use_global_config;
+	int use_system_config;
+	int use_local_config;
+	int use_worktree_config;
+	int respect_includes_opt;
+};
+#define CONFIG_LOCATION_OPTIONS_INIT { \
+	.respect_includes_opt = -1, \
+}
+
+#define CONFIG_TYPE_OPTIONS(type) \
+	OPT_GROUP(N_("Type")), \
+	OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type), \
+	OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL), \
+	OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT), \
+	OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT), \
+	OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR), \
+	OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH), \
+	OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE)
+
+#define CONFIG_DISPLAY_OPTIONS(opts) \
+	OPT_GROUP(N_("Display options")), \
+	OPT_BOOL('z', "null", &opts.end_nul, N_("terminate values with NUL byte")), \
+	OPT_BOOL(0, "name-only", &opts.omit_values, N_("show variable names only")), \
+	OPT_BOOL(0, "show-origin", &opts.show_origin, N_("show origin of config (file, standard input, blob, command line)")), \
+	OPT_BOOL(0, "show-scope", &opts.show_scope, N_("show scope of config (worktree, local, global, system, command)")), \
+	OPT_BOOL(0, "show-names", &opts.show_keys, N_("show config keys in addition to their values")), \
+	CONFIG_TYPE_OPTIONS(opts.type)
+
+struct config_display_options {
+	int end_nul;
+	int omit_values;
+	int show_origin;
+	int show_scope;
+	int show_keys;
+	int type;
+	char *default_value;
+	/* Populated via `display_options_init()`. */
+	int term;
+	int delim;
+	int key_delim;
+};
+#define CONFIG_DISPLAY_OPTIONS_INIT { \
+	.term = '\n', \
+	.delim = '=', \
+	.key_delim = ' ', \
+}
 
 #define TYPE_BOOL		1
 #define TYPE_INT		2
@@ -81,8 +135,6 @@ static int fixed_value;
 	{ OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
 	PARSE_OPT_NONEG, option_parse_type, (i) }
 
-static NORETURN void usage_builtin_config(void);
-
 static int option_parse_type(const struct option *opt, const char *arg,
 			     int unset)
 {
@@ -127,60 +179,13 @@ static int option_parse_type(const struct option *opt, const char *arg,
 		 * --type=int'.
 		 */
 		error(_("only one type at a time"));
-		usage_builtin_config();
+		exit(129);
 	}
 	*to_type = new_type;
 
 	return 0;
 }
 
-static struct option builtin_config_options[] = {
-	OPT_GROUP(N_("Config file location")),
-	OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
-	OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
-	OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
-	OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),
-	OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
-	OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
-	OPT_GROUP(N_("Action")),
-	OPT_BIT(0, "get", &actions, N_("get value: name [value-pattern]"), ACTION_GET),
-	OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-pattern]"), ACTION_GET_ALL),
-	OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-pattern]"), ACTION_GET_REGEXP),
-	OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
-	OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value-pattern]"), ACTION_REPLACE_ALL),
-	OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
-	OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-pattern]"), ACTION_UNSET),
-	OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-pattern]"), ACTION_UNSET_ALL),
-	OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
-	OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
-	OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
-	OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),
-	OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
-	OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
-	OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
-	OPT_GROUP(N_("Type")),
-	OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),
-	OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
-	OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
-	OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
-	OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),
-	OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
-	OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
-	OPT_GROUP(N_("Other")),
-	OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),
-	OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
-	OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
-	OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
-	OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
-	OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
-	OPT_END(),
-};
-
-static NORETURN void usage_builtin_config(void)
-{
-	usage_with_options(builtin_config_usage, builtin_config_options);
-}
-
 static void check_argc(int argc, int min, int max)
 {
 	if (argc >= min && argc <= max)
@@ -190,27 +195,29 @@ static void check_argc(int argc, int min, int max)
 	else
 		error(_("wrong number of arguments, should be from %d to %d"),
 		      min, max);
-	usage_builtin_config();
+	exit(129);
 }
 
-static void show_config_origin(const struct key_value_info *kvi,
+static void show_config_origin(const struct config_display_options *opts,
+			       const struct key_value_info *kvi,
 			       struct strbuf *buf)
 {
-	const char term = end_nul ? '\0' : '\t';
+	const char term = opts->end_nul ? '\0' : '\t';
 
 	strbuf_addstr(buf, config_origin_type_name(kvi->origin_type));
 	strbuf_addch(buf, ':');
-	if (end_nul)
+	if (opts->end_nul)
 		strbuf_addstr(buf, kvi->filename ? kvi->filename : "");
 	else
 		quote_c_style(kvi->filename ? kvi->filename : "", buf, NULL, 0);
 	strbuf_addch(buf, term);
 }
 
-static void show_config_scope(const struct key_value_info *kvi,
+static void show_config_scope(const struct config_display_options *opts,
+			      const struct key_value_info *kvi,
 			      struct strbuf *buf)
 {
-	const char term = end_nul ? '\0' : '\t';
+	const char term = opts->end_nul ? '\0' : '\t';
 	const char *scope = config_scope_name(kvi->scope);
 
 	strbuf_addstr(buf, N_(scope));
@@ -219,24 +226,25 @@ static void show_config_scope(const struct key_value_info *kvi,
 
 static int show_all_config(const char *key_, const char *value_,
 			   const struct config_context *ctx,
-			   void *cb UNUSED)
+			   void *cb)
 {
+	const struct config_display_options *opts = cb;
 	const struct key_value_info *kvi = ctx->kvi;
 
-	if (show_origin || show_scope) {
+	if (opts->show_origin || opts->show_scope) {
 		struct strbuf buf = STRBUF_INIT;
-		if (show_scope)
-			show_config_scope(kvi, &buf);
-		if (show_origin)
-			show_config_origin(kvi, &buf);
+		if (opts->show_scope)
+			show_config_scope(opts, kvi, &buf);
+		if (opts->show_origin)
+			show_config_origin(opts, kvi, &buf);
 		/* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 		fwrite(buf.buf, 1, buf.len, stdout);
 		strbuf_release(&buf);
 	}
-	if (!omit_values && value_)
-		printf("%s%c%s%c", key_, delim, value_, term);
+	if (!opts->omit_values && value_)
+		printf("%s%c%s%c", key_, opts->delim, value_, opts->term);
 	else
-		printf("%s%c", key_, term);
+		printf("%s%c", key_, opts->term);
 	return 0;
 }
 
@@ -246,26 +254,27 @@ struct strbuf_list {
 	int alloc;
 };
 
-static int format_config(struct strbuf *buf, const char *key_,
+static int format_config(const struct config_display_options *opts,
+			 struct strbuf *buf, const char *key_,
 			 const char *value_, const struct key_value_info *kvi)
 {
-	if (show_scope)
-		show_config_scope(kvi, buf);
-	if (show_origin)
-		show_config_origin(kvi, buf);
-	if (show_keys)
+	if (opts->show_scope)
+		show_config_scope(opts, kvi, buf);
+	if (opts->show_origin)
+		show_config_origin(opts, kvi, buf);
+	if (opts->show_keys)
 		strbuf_addstr(buf, key_);
-	if (!omit_values) {
-		if (show_keys)
-			strbuf_addch(buf, key_delim);
+	if (!opts->omit_values) {
+		if (opts->show_keys)
+			strbuf_addch(buf, opts->key_delim);
 
-		if (type == TYPE_INT)
+		if (opts->type == TYPE_INT)
 			strbuf_addf(buf, "%"PRId64,
 				    git_config_int64(key_, value_ ? value_ : "", kvi));
-		else if (type == TYPE_BOOL)
+		else if (opts->type == TYPE_BOOL)
 			strbuf_addstr(buf, git_config_bool(key_, value_) ?
 				      "true" : "false");
-		else if (type == TYPE_BOOL_OR_INT) {
+		else if (opts->type == TYPE_BOOL_OR_INT) {
 			int is_bool, v;
 			v = git_config_bool_or_int(key_, value_, kvi,
 						   &is_bool);
@@ -273,24 +282,24 @@ static int format_config(struct strbuf *buf, const char *key_,
 				strbuf_addstr(buf, v ? "true" : "false");
 			else
 				strbuf_addf(buf, "%d", v);
-		} else if (type == TYPE_BOOL_OR_STR) {
+		} else if (opts->type == TYPE_BOOL_OR_STR) {
 			int v = git_parse_maybe_bool(value_);
 			if (v < 0)
 				strbuf_addstr(buf, value_);
 			else
 				strbuf_addstr(buf, v ? "true" : "false");
-		} else if (type == TYPE_PATH) {
-			const char *v;
+		} else if (opts->type == TYPE_PATH) {
+			char *v;
 			if (git_config_pathname(&v, key_, value_) < 0)
 				return -1;
 			strbuf_addstr(buf, v);
 			free((char *)v);
-		} else if (type == TYPE_EXPIRY_DATE) {
+		} else if (opts->type == TYPE_EXPIRY_DATE) {
 			timestamp_t t;
 			if (git_config_expiry_date(&t, key_, value_) < 0)
 				return -1;
 			strbuf_addf(buf, "%"PRItime, t);
-		} else if (type == TYPE_COLOR) {
+		} else if (opts->type == TYPE_COLOR) {
 			char v[COLOR_MAXLEN];
 			if (git_config_color(v, key_, value_) < 0)
 				return -1;
@@ -299,43 +308,73 @@ static int format_config(struct strbuf *buf, const char *key_,
 			strbuf_addstr(buf, value_);
 		} else {
 			/* Just show the key name; back out delimiter */
-			if (show_keys)
+			if (opts->show_keys)
 				strbuf_setlen(buf, buf->len - 1);
 		}
 	}
-	strbuf_addch(buf, term);
+	strbuf_addch(buf, opts->term);
 	return 0;
 }
 
+#define GET_VALUE_ALL        (1 << 0)
+#define GET_VALUE_KEY_REGEXP (1 << 1)
+
+struct collect_config_data {
+	const struct config_display_options *display_opts;
+	struct strbuf_list *values;
+	const char *value_pattern;
+	const char *key;
+	regex_t *regexp;
+	regex_t *key_regexp;
+	int do_not_match;
+	unsigned get_value_flags;
+	unsigned flags;
+};
+
 static int collect_config(const char *key_, const char *value_,
 			  const struct config_context *ctx, void *cb)
 {
-	struct strbuf_list *values = cb;
+	struct collect_config_data *data = cb;
+	struct strbuf_list *values = data->values;
 	const struct key_value_info *kvi = ctx->kvi;
 
-	if (!use_key_regexp && strcmp(key_, key))
+	if (!(data->get_value_flags & GET_VALUE_KEY_REGEXP) &&
+	    strcmp(key_, data->key))
 		return 0;
-	if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
+	if ((data->get_value_flags & GET_VALUE_KEY_REGEXP) &&
+	    regexec(data->key_regexp, key_, 0, NULL, 0))
 		return 0;
-	if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
+	if ((data->flags & CONFIG_FLAGS_FIXED_VALUE) &&
+	    strcmp(data->value_pattern, (value_?value_:"")))
 		return 0;
-	if (regexp != NULL &&
-	    (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
+	if (data->regexp &&
+	    (data->do_not_match ^ !!regexec(data->regexp, (value_?value_:""), 0, NULL, 0)))
 		return 0;
 
 	ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 	strbuf_init(&values->items[values->nr], 0);
 
-	return format_config(&values->items[values->nr++], key_, value_, kvi);
+	return format_config(data->display_opts, &values->items[values->nr++],
+			     key_, value_, kvi);
 }
 
-static int get_value(const char *key_, const char *regex_, unsigned flags)
+static int get_value(const struct config_location_options *opts,
+		     const struct config_display_options *display_opts,
+		     const char *key_, const char *regex_,
+		     unsigned get_value_flags, unsigned flags)
 {
 	int ret = CONFIG_GENERIC_ERROR;
 	struct strbuf_list values = {NULL};
+	struct collect_config_data data = {
+		.display_opts = display_opts,
+		.values = &values,
+		.get_value_flags = get_value_flags,
+		.flags = flags,
+	};
+	char *key = NULL;
 	int i;
 
-	if (use_key_regexp) {
+	if (get_value_flags & GET_VALUE_KEY_REGEXP) {
 		char *tl;
 
 		/*
@@ -352,10 +391,10 @@ static int get_value(const char *key_, const char *regex_, unsigned flags)
 		for (tl = key; *tl && *tl != '.'; tl++)
 			*tl = tolower(*tl);
 
-		key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
-		if (regcomp(key_regexp, key, REG_EXTENDED)) {
+		data.key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
+		if (regcomp(data.key_regexp, key, REG_EXTENDED)) {
 			error(_("invalid key pattern: %s"), key_);
-			FREE_AND_NULL(key_regexp);
+			FREE_AND_NULL(data.key_regexp);
 			ret = CONFIG_INVALID_PATTERN;
 			goto free_strings;
 		}
@@ -364,30 +403,32 @@ static int get_value(const char *key_, const char *regex_, unsigned flags)
 			ret = CONFIG_INVALID_KEY;
 			goto free_strings;
 		}
+
+		data.key = key;
 	}
 
 	if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
-		value_pattern = regex_;
+		data.value_pattern = regex_;
 	else if (regex_) {
 		if (regex_[0] == '!') {
-			do_not_match = 1;
+			data.do_not_match = 1;
 			regex_++;
 		}
 
-		regexp = (regex_t*)xmalloc(sizeof(regex_t));
-		if (regcomp(regexp, regex_, REG_EXTENDED)) {
+		data.regexp = (regex_t*)xmalloc(sizeof(regex_t));
+		if (regcomp(data.regexp, regex_, REG_EXTENDED)) {
 			error(_("invalid pattern: %s"), regex_);
-			FREE_AND_NULL(regexp);
+			FREE_AND_NULL(data.regexp);
 			ret = CONFIG_INVALID_PATTERN;
 			goto free_strings;
 		}
 	}
 
-	config_with_options(collect_config, &values,
-			    &given_config_source, the_repository,
-			    &config_options);
+	config_with_options(collect_config, &data,
+			    &opts->source, the_repository,
+			    &opts->options);
 
-	if (!values.nr && default_value) {
+	if (!values.nr && display_opts->default_value) {
 		struct key_value_info kvi = KVI_INIT;
 		struct strbuf *item;
 
@@ -395,16 +436,17 @@ static int get_value(const char *key_, const char *regex_, unsigned flags)
 		ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 		item = &values.items[values.nr++];
 		strbuf_init(item, 0);
-		if (format_config(item, key_, default_value, &kvi) < 0)
+		if (format_config(display_opts, item, key_,
+				  display_opts->default_value, &kvi) < 0)
 			die(_("failed to format default config value: %s"),
-				default_value);
+			    display_opts->default_value);
 	}
 
 	ret = !values.nr;
 
 	for (i = 0; i < values.nr; i++) {
 		struct strbuf *buf = values.items + i;
-		if (do_all || i == values.nr - 1)
+		if ((get_value_flags & GET_VALUE_ALL) || i == values.nr - 1)
 			fwrite(buf->buf, 1, buf->len, stdout);
 		strbuf_release(buf);
 	}
@@ -412,20 +454,20 @@ static int get_value(const char *key_, const char *regex_, unsigned flags)
 
 free_strings:
 	free(key);
-	if (key_regexp) {
-		regfree(key_regexp);
-		free(key_regexp);
+	if (data.key_regexp) {
+		regfree(data.key_regexp);
+		free(data.key_regexp);
 	}
-	if (regexp) {
-		regfree(regexp);
-		free(regexp);
+	if (data.regexp) {
+		regfree(data.regexp);
+		free(data.regexp);
 	}
 
 	return ret;
 }
 
 static char *normalize_value(const char *key, const char *value,
-			     struct key_value_info *kvi)
+			     int type, struct key_value_info *kvi)
 {
 	if (!value)
 		return NULL;
@@ -476,97 +518,113 @@ static char *normalize_value(const char *key, const char *value,
 	BUG("cannot normalize type %d", type);
 }
 
-static int get_color_found;
-static const char *get_color_slot;
-static const char *get_colorbool_slot;
-static char parsed_color[COLOR_MAXLEN];
+struct get_color_config_data {
+	int get_color_found;
+	const char *get_color_slot;
+	char parsed_color[COLOR_MAXLEN];
+};
 
 static int git_get_color_config(const char *var, const char *value,
 				const struct config_context *ctx UNUSED,
-				void *cb UNUSED)
+				void *cb)
 {
-	if (!strcmp(var, get_color_slot)) {
+	struct get_color_config_data *data = cb;
+
+	if (!strcmp(var, data->get_color_slot)) {
 		if (!value)
 			config_error_nonbool(var);
-		if (color_parse(value, parsed_color) < 0)
+		if (color_parse(value, data->parsed_color) < 0)
 			return -1;
-		get_color_found = 1;
+		data->get_color_found = 1;
 	}
 	return 0;
 }
 
-static void get_color(const char *var, const char *def_color)
+static void get_color(const struct config_location_options *opts,
+		      const char *var, const char *def_color)
 {
-	get_color_slot = var;
-	get_color_found = 0;
-	parsed_color[0] = '\0';
-	config_with_options(git_get_color_config, NULL,
-			    &given_config_source, the_repository,
-			    &config_options);
+	struct get_color_config_data data = {
+		.get_color_slot = var,
+		.parsed_color[0] = '\0',
+	};
 
-	if (!get_color_found && def_color) {
-		if (color_parse(def_color, parsed_color) < 0)
+	config_with_options(git_get_color_config, &data,
+			    &opts->source, the_repository,
+			    &opts->options);
+
+	if (!data.get_color_found && def_color) {
+		if (color_parse(def_color, data.parsed_color) < 0)
 			die(_("unable to parse default color value"));
 	}
 
-	fputs(parsed_color, stdout);
+	fputs(data.parsed_color, stdout);
 }
 
-static int get_colorbool_found;
-static int get_diff_color_found;
-static int get_color_ui_found;
+struct get_colorbool_config_data {
+	int get_colorbool_found;
+	int get_diff_color_found;
+	int get_color_ui_found;
+	const char *get_colorbool_slot;
+};
+
 static int git_get_colorbool_config(const char *var, const char *value,
 				    const struct config_context *ctx UNUSED,
-				    void *data UNUSED)
+				    void *cb)
 {
-	if (!strcmp(var, get_colorbool_slot))
-		get_colorbool_found = git_config_colorbool(var, value);
+	struct get_colorbool_config_data *data = cb;
+
+	if (!strcmp(var, data->get_colorbool_slot))
+		data->get_colorbool_found = git_config_colorbool(var, value);
 	else if (!strcmp(var, "diff.color"))
-		get_diff_color_found = git_config_colorbool(var, value);
+		data->get_diff_color_found = git_config_colorbool(var, value);
 	else if (!strcmp(var, "color.ui"))
-		get_color_ui_found = git_config_colorbool(var, value);
+		data->get_color_ui_found = git_config_colorbool(var, value);
 	return 0;
 }
 
-static int get_colorbool(const char *var, int print)
+static int get_colorbool(const struct config_location_options *opts,
+			 const char *var, int print)
 {
-	get_colorbool_slot = var;
-	get_colorbool_found = -1;
-	get_diff_color_found = -1;
-	get_color_ui_found = -1;
-	config_with_options(git_get_colorbool_config, NULL,
-			    &given_config_source, the_repository,
-			    &config_options);
+	struct get_colorbool_config_data data = {
+		.get_colorbool_slot = var,
+		.get_colorbool_found = -1,
+		.get_diff_color_found = -1,
+		.get_color_ui_found = -1,
+	};
 
-	if (get_colorbool_found < 0) {
-		if (!strcmp(get_colorbool_slot, "color.diff"))
-			get_colorbool_found = get_diff_color_found;
-		if (get_colorbool_found < 0)
-			get_colorbool_found = get_color_ui_found;
+	config_with_options(git_get_colorbool_config, &data,
+			    &opts->source, the_repository,
+			    &opts->options);
+
+	if (data.get_colorbool_found < 0) {
+		if (!strcmp(data.get_colorbool_slot, "color.diff"))
+			data.get_colorbool_found = data.get_diff_color_found;
+		if (data.get_colorbool_found < 0)
+			data.get_colorbool_found = data.get_color_ui_found;
 	}
 
-	if (get_colorbool_found < 0)
+	if (data.get_colorbool_found < 0)
 		/* default value if none found in config */
-		get_colorbool_found = GIT_COLOR_AUTO;
+		data.get_colorbool_found = GIT_COLOR_AUTO;
 
-	get_colorbool_found = want_color(get_colorbool_found);
+	data.get_colorbool_found = want_color(data.get_colorbool_found);
 
 	if (print) {
-		printf("%s\n", get_colorbool_found ? "true" : "false");
+		printf("%s\n", data.get_colorbool_found ? "true" : "false");
 		return 0;
 	} else
-		return get_colorbool_found ? 0 : 1;
+		return data.get_colorbool_found ? 0 : 1;
 }
 
-static void check_write(void)
+static void check_write(const struct git_config_source *source)
 {
-	if (!given_config_source.file && !startup_info->have_repository)
+	if (!source->file && !startup_info->have_repository)
 		die(_("not in a git directory"));
 
-	if (given_config_source.use_stdin)
+	if (source->use_stdin)
 		die(_("writing to stdin is not supported"));
 
-	if (given_config_source.blob)
+	if (source->blob)
 		die(_("writing config blobs is not supported"));
 }
 
@@ -603,10 +661,13 @@ static int urlmatch_collect_fn(const char *var, const char *value,
 	return 0;
 }
 
-static int get_urlmatch(const char *var, const char *url)
+static int get_urlmatch(const struct config_location_options *opts,
+			const struct config_display_options *_display_opts,
+			const char *var, const char *url)
 {
 	int ret;
 	char *section_tail;
+	struct config_display_options display_opts = *_display_opts;
 	struct string_list_item *item;
 	struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 	struct string_list values = STRING_LIST_INIT_DUP;
@@ -623,15 +684,15 @@ static int get_urlmatch(const char *var, const char *url)
 	if (section_tail) {
 		*section_tail = '\0';
 		config.key = section_tail + 1;
-		show_keys = 0;
+		display_opts.show_keys = 0;
 	} else {
 		config.key = NULL;
-		show_keys = 1;
+		display_opts.show_keys = 1;
 	}
 
 	config_with_options(urlmatch_config_entry, &config,
-			    &given_config_source, the_repository,
-			    &config_options);
+			    &opts->source, the_repository,
+			    &opts->options);
 
 	ret = !values.nr;
 
@@ -639,7 +700,7 @@ static int get_urlmatch(const char *var, const char *url)
 		struct urlmatch_current_candidate_value *matched = item->util;
 		struct strbuf buf = STRBUF_INIT;
 
-		format_config(&buf, item->string,
+		format_config(&display_opts, &buf, item->string,
 			      matched->value_is_null ? NULL : matched->value.buf,
 			      &matched->kvi);
 		fwrite(buf.buf, 1, buf.len, stdout);
@@ -669,49 +730,39 @@ static char *default_user_config(voi