Merge branch 'as/calloc-takes-nmemb-then-size'

Code clean-up.

* as/calloc-takes-nmemb-then-size:
  calloc() and xcalloc() takes nmemb and then size
diff --git a/.gitignore b/.gitignore
index 81e12c0..5bfb234 100644
--- a/.gitignore
+++ b/.gitignore
@@ -178,6 +178,7 @@
 /gitweb/static/gitweb.min.*
 /test-chmtime
 /test-ctype
+/test-config
 /test-date
 /test-delta
 /test-dump-cache-tree
diff --git a/Documentation/RelNotes/2.2.0.txt b/Documentation/RelNotes/2.2.0.txt
new file mode 100644
index 0000000..22b7361
--- /dev/null
+++ b/Documentation/RelNotes/2.2.0.txt
@@ -0,0 +1,132 @@
+Git v2.2 Release Notes
+======================
+
+Updates since v2.1
+------------------
+
+Ports
+
+ * Building on older MacOS X systems automatically sets
+   the necessary NO_APPLE_COMMON_CRYPTO build-time option.
+
+
+UI, Workflows & Features
+
+ * "git config --edit --global" starts from a skeletal per-user
+   configuration file contents, instead of a total blank, when the
+   user does not already have any.  This immediately reduces the
+   need for a later "Have you forgotten setting core.user?" and we
+   can add more to the template as we gain more experience.
+
+ * "git stash list -p" used to be almost always a no-op because each
+   stash entry is represented as a merge commit.  It learned to show
+   the difference between the base commit version and the working tree
+   version, which is in line with what "git show" gives.
+
+Performance, Internal Implementation, etc.
+
+ * The API to manipulate the "refs" is currently undergoing a revamp
+   to make it more transactional, with the eventual goal to allow
+   all-or-none atomic updates and migrating the storage to something
+   other than the traditional filesystem based one (e.g. databases).
+
+ * We no longer attempt to keep track of individual dependencies to
+   the header files in the build procedure, relying on automated
+   dependency generation support from modern compilers.
+
+ * In tests, we have been using NOT_{MINGW,CYGWIN} test prerequisites
+   long before negated prerequisites e.g. !MINGW were invented.
+   The former has been converted to the latter to avoid confusion.
+
+ * Looking up remotes configuration in a repository with very many
+   remotes defined has been optimized.
+
+ * There are cases where you lock and open to write a file, close it
+   to show the updated contents to external processes, and then have
+   to update the file again while still holding the lock, but the
+   lockfile API lacked support for such an access pattern.
+
+ * The API to allocate the structure to keep track of commit
+   decoration has been updated to make it less cumbersome to use.
+
+ * An in-core caching layer to let us avoid reading the same
+   configuration files number of times has been added.  A few commands
+   have been converted to use this subsystem.
+
+ * Various code paths have been cleaned up and simplified by using
+   "strbuf", "starts_with()", and "skip_prefix()" APIs more.
+
+ * A few codepaths that died when large blobs that would not fit in
+   core are involved in their operation have been taught to punt
+   instead, by e.g. marking too large a blob as not to be diffed.
+
+ * A few more code paths in "commit" and "checkout" have been taught
+   to repopulate the cache-tree in the index, to help speed up later
+   "write-tree" (used in "commit") and "diff-index --cached" (used in
+   "status").
+
+
+Also contains various documentation updates and code clean-ups.
+
+
+Fixes since v2.1
+----------------
+
+Unless otherwise noted, all the fixes since v2.1 in the maintenance
+track are contained in this release (see the maintenance releases'
+notes for details).
+
+ * "git log --pretty/format=" with an empty format string did not
+   mean the more obvious "No output whatsoever" but "Use default
+   format", which was counterintuitive.
+   (merge b9c7d6e jk/pretty-empty-format later to maint).
+
+ * Implementations of "tar" that do not understand an extended pax
+   header would extract the contents of it in a regular file; make
+   sure the permission bits of this file follows the same tar.umask
+   configuration setting.
+
+ * "git -c section.var command" and "git -c section.var= command"
+   should pass the configuration differently (the former should be a
+   boolean true, the latter should be an empty string).
+   (merge a789ca7 jk/command-line-config-empty-string later to maint).
+
+ * Applying a patch not generated by Git in a subdirectory used to
+   check the whitespace breakage using the attributes for incorrect
+   paths. Also whitespace checks were performed even for paths
+   excluded via "git apply --exclude=<path>" mechanism.
+   (merge 477a08a jc/apply-ws-prefix later to maint).
+
+ * "git bundle create" with date-range specification were meant to
+   exclude tags outside the range, but it didn't.
+   (merge 2c8544a lf/bundle-exclusion later to maint).
+
+ * "git add x" where x that used to be a directory has become a
+   symbolic link to a directory misbehaved.
+   (merge ccad42d rs/refresh-beyond-symlink later to maint).
+
+ * The prompt script checked $GIT_DIR/ref/stash file to see if there
+   is a stash, which was a no-no.
+   (merge 0fa7f01 jk/prompt-stash-could-be-packed later to maint).
+
+ * Pack-protocol documentation had a minor typo.
+   (merge 5d146f7 sp/pack-protocol-doc-on-shallow later to maint).
+
+ * "git checkout -m" did not switch to another branch while carrying
+   the local changes forward when a path was deleted from the index.
+   (merge 6a143aa jn/unpack-trees-checkout-m-carry-deletion later to maint).
+
+ * With sufficiently long refnames, "git fast-import" could have
+   overflown an on-stack buffer.
+   (merge c252785 jk/fast-import-fixes later to maint).
+
+ * After "pack-refs --prune" packed refs at the top-level, it failed
+   to prune them.
+   (merge afd11d3 jk/prune-top-level-refs-after-packing later to maint).
+
+ * Progress output from "git gc --auto" was visible in "git fetch -q".
+   (merge 6fceed3 nd/fetch-pass-quiet-to-gc-child-process later to maint).
+
+ * We used to pass -1000 to poll(2), expecting it to also mean "no
+   timeout", which should be spelled as -1.
+   (merge 6c71f8b et/spell-poll-infinite-with-minus-one-only later to maint).
diff --git a/Documentation/config.txt b/Documentation/config.txt
index c55c22a..3b5b24a 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -499,7 +499,8 @@
 	Files larger than this size are stored deflated, without
 	attempting delta compression.  Storing large files without
 	delta compression avoids excessive memory usage, at the
-	slight expense of increased disk usage.
+	slight expense of increased disk usage. Additionally files
+	larger than this size are always treated as binary.
 +
 Default is 512 MiB on all platforms.  This should be reasonable
 for most projects as source code and other text files can still
diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt
index 221506b..dbe9a46 100644
--- a/Documentation/git-fast-export.txt
+++ b/Documentation/git-fast-export.txt
@@ -105,6 +105,11 @@
 	in the commit (as opposed to just listing the files which are
 	different from the commit's first parent).
 
+--anonymize::
+	Anonymize the contents of the repository while still retaining
+	the shape of the history and stored tree.  See the section on
+	`ANONYMIZING` below.
+
 --refspec::
 	Apply the specified refspec to each ref exported. Multiple of them can
 	be specified.
@@ -141,6 +146,62 @@
 'refs/heads/master'.
 
 
+ANONYMIZING
+-----------
+
+If the `--anonymize` option is given, git will attempt to remove all
+identifying information from the repository while still retaining enough
+of the original tree and history patterns to reproduce some bugs. The
+goal is that a git bug which is found on a private repository will
+persist in the anonymized repository, and the latter can be shared with
+git developers to help solve the bug.
+
+With this option, git will replace all refnames, paths, blob contents,
+commit and tag messages, names, and email addresses in the output with
+anonymized data.  Two instances of the same string will be replaced
+equivalently (e.g., two commits with the same author will have the same
+anonymized author in the output, but bear no resemblance to the original
+author string). The relationship between commits, branches, and tags is
+retained, as well as the commit timestamps (but the commit messages and
+refnames bear no resemblance to the originals). The relative makeup of
+the tree is retained (e.g., if you have a root tree with 10 files and 3
+trees, so will the output), but their names and the contents of the
+files will be replaced.
+
+If you think you have found a git bug, you can start by exporting an
+anonymized stream of the whole repository:
+
+---------------------------------------------------
+$ git fast-export --anonymize --all >anon-stream
+---------------------------------------------------
+
+Then confirm that the bug persists in a repository created from that
+stream (many bugs will not, as they really do depend on the exact
+repository contents):
+
+---------------------------------------------------
+$ git init anon-repo
+$ cd anon-repo
+$ git fast-import <../anon-stream
+$ ... test your bug ...
+---------------------------------------------------
+
+If the anonymized repository shows the bug, it may be worth sharing
+`anon-stream` along with a regular bug report. Note that the anonymized
+stream compresses very well, so gzipping it is encouraged. If you want
+to examine the stream to see that it does not contain any private data,
+you can peruse it directly before sending. You may also want to try:
+
+---------------------------------------------------
+$ perl -pe 's/\d+/X/g' <anon-stream | sort -u | less
+---------------------------------------------------
+
+which shows all of the unique lines (with numbers converted to "X", to
+collapse "User 0", "User 1", etc into "User X"). This produces a much
+smaller output, and it is usually easy to quickly confirm that there is
+no private data in the stream.
+
+
 Limitations
 -----------
 
diff --git a/Documentation/git-imap-send.txt b/Documentation/git-imap-send.txt
index 875d283..7d991d9 100644
--- a/Documentation/git-imap-send.txt
+++ b/Documentation/git-imap-send.txt
@@ -38,18 +38,17 @@
 imap.folder::
 	The folder to drop the mails into, which is typically the Drafts
 	folder. For example: "INBOX.Drafts", "INBOX/Drafts" or
-	"[Gmail]/Drafts". Required to use imap-send.
+	"[Gmail]/Drafts". Required.
 
 imap.tunnel::
 	Command used to setup a tunnel to the IMAP server through which
 	commands will be piped instead of using a direct network connection
-	to the server. Required when imap.host is not set to use imap-send.
+	to the server. Required when imap.host is not set.
 
 imap.host::
 	A URL identifying the server. Use a `imap://` prefix for non-secure
 	connections and a `imaps://` prefix for secure connections.
-	Ignored when imap.tunnel is set, but required to use imap-send
-	otherwise.
+	Ignored when imap.tunnel is set, but required otherwise.
 
 imap.user::
 	The username to use when logging in to the server.
@@ -76,7 +75,8 @@
 
 imap.authMethod::
 	Specify authenticate method for authentication with IMAP server.
-	Current supported method is 'CRAM-MD5' only.
+	Current supported method is 'CRAM-MD5' only. If this is not set
+	then 'git imap-send' uses the basic IMAP plaintext LOGIN command.
 
 Examples
 ~~~~~~~~
diff --git a/Documentation/git-init.txt b/Documentation/git-init.txt
index afd721e..369f889 100644
--- a/Documentation/git-init.txt
+++ b/Documentation/git-init.txt
@@ -43,7 +43,7 @@
 -q::
 --quiet::
 
-Only print error and warning messages, all other output will be suppressed.
+Only print error and warning messages; all other output will be suppressed.
 
 --bare::
 
@@ -57,12 +57,12 @@
 
 --separate-git-dir=<git dir>::
 
-Instead of initializing the repository where it is supposed to be,
-place a filesytem-agnostic Git symbolic link there, pointing to the
-specified path, and initialize a Git repository at the path. The
-result is Git repository can be separated from working tree. If this
-is reinitialization, the repository will be moved to the specified
-path.
+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
+repository.  This file acts as filesystem-agnostic Git symbolic link to the
+repository.
++
+If this is reinitialization, the repository will be moved to the specified path.
 
 --shared[=(false|true|umask|group|all|world|everybody|0xxx)]::
 
@@ -72,60 +72,65 @@
 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).
-
++
 The option can have the following values, defaulting to 'group' if no value
 is given:
++
+--
+'umask' (or 'false')::
 
- - 'umask' (or 'false'): Use permissions reported by umask(2). The default,
-   when `--shared` is not specified.
+Use permissions reported by umask(2). The default, when `--shared` is not
+specified.
 
- - 'group' (or 'true'): Make the repository group-writable, (and g+sx, since
-   the git group may be not 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 the repository
-   permissions.
+'group' (or 'true')::
 
- - 'all' (or 'world' or 'everybody'): Same as 'group', but make the repository
-   readable by all users.
+Make the repository group-writable, (and g+sx, since the git group may be not
+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
+the repository permissions.
 
- - '0xxx': '0xxx' is an octal number and each file will have mode '0xxx'.
-   '0xxx' will override users' umask(2) value (and not only loosen permissions
-   as 'group' and 'all' does). '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.
+'all' (or 'world' or 'everybody')::
 
-By default, the configuration flag receive.denyNonFastForwards is enabled
+Same as 'group', but make the repository readable by all users.
+
+'0xxx'::
+
+'0xxx' is an octal number and each file will have mode '0xxx'. '0xxx' will
+override users' umask(2) value (and not only loosen permissions as 'group' and
+'all' does). '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.
+--
+
+By default, the configuration flag `receive.denyNonFastForwards` is enabled
 in shared repositories, so that you cannot force a non fast-forwarding push
 into it.
 
-If you name a (possibly non-existent) directory at the end of the command
-line, the command is run inside the directory (possibly after creating it).
+If you provide a 'directory', the command is run inside it. If this directory
+does not exist, it will be created.
 
 --
 
-
 TEMPLATE DIRECTORY
 ------------------
 
 The template directory contains files and directories that will be copied to
 the `$GIT_DIR` after it is created.
 
-The template directory used will (in order):
+The template directory will be one of the following (in order):
 
- - The argument given with the `--template` option.
+ - the argument given with the `--template` option;
 
- - The contents of the `$GIT_TEMPLATE_DIR` environment variable.
+ - the contents of the `$GIT_TEMPLATE_DIR` environment variable;
 
- - The `init.templatedir` configuration variable.
+ - the `init.templatedir` configuration variable; or
 
- - The default template directory: `/usr/share/git-core/templates`.
+ - the default template directory: `/usr/share/git-core/templates`.
 
-The default template directory includes some directory structure, some
-suggested "exclude patterns", and copies of sample "hook" files.
-The suggested patterns and hook files are all modifiable and extensible.
+The default template directory includes some directory structure, suggested
+"exclude patterns" (see linkgit:gitignore[5]), and sample hook files (see linkgit:githooks[5]).
 
 EXAMPLES
 --------
@@ -136,10 +141,12 @@
 $ cd /path/to/my/codebase
 $ git init      <1>
 $ git add .     <2>
+$ git commit    <3>
 ----------------
 +
-<1> prepare /path/to/my/codebase/.git directory
-<2> add all existing file to the index
+<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.
 
 GIT
 ---
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 2a93c64..f14100a 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -316,11 +316,8 @@
 
 -f::
 --force-rebase::
-	Force the rebase even if the current branch is a descendant
-	of the commit you are rebasing onto.  Normally non-interactive rebase will
-	exit with the message "Current branch is up to date" in such a
-	situation.
-	Incompatible with the --interactive option.
+	Force a rebase even if the current branch is up-to-date and
+	the command without `--force` would return without doing anything.
 +
 You may find this (or --no-ff with an interactive rebase) helpful after
 reverting a topic branch merge, as this option recreates the topic branch with
diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt
index 7a1585d..fd7f8b5 100644
--- a/Documentation/git-rev-list.txt
+++ b/Documentation/git-rev-list.txt
@@ -45,7 +45,7 @@
 	     [ \--regexp-ignore-case | -i ]
 	     [ \--extended-regexp | -E ]
 	     [ \--fixed-strings | -F ]
-	     [ \--date=(local|relative|default|iso|rfc|short) ]
+	     [ \--date=(local|relative|default|iso|iso-strict|rfc|short) ]
 	     [ [\--objects | \--objects-edge] [ \--unpacked ] ]
 	     [ \--pretty | \--header ]
 	     [ \--bisect ]
diff --git a/Documentation/git-send-pack.txt b/Documentation/git-send-pack.txt
index dc3a568..2a0de42 100644
--- a/Documentation/git-send-pack.txt
+++ b/Documentation/git-send-pack.txt
@@ -35,6 +35,16 @@
 	Instead of explicitly specifying which refs to update,
 	update all heads that locally exist.
 
+--stdin::
+	Take the list of refs from stdin, one per line. If there
+	are refs specified on the command line in addition to this
+	option, then the refs from stdin are processed after those
+	on the command line.
++
+If '--stateless-rpc' is specified together with this option then
+the list of refs must be in packet format (pkt-line). Each ref must
+be in a separate packet, and the list must end with a flush packet.
+
 --dry-run::
 	Do everything except actually send the updates.
 
@@ -77,7 +87,8 @@
 Without '--all' and without any '<ref>', the heads that exist
 both on the local side and on the remote side are updated.
 
-When one or more '<ref>' are specified explicitly, it can be either a
+When one or more '<ref>' are specified explicitly (whether on the
+command line or via `--stdin`), it can be either a
 single pattern, or a pair of such pattern separated by a colon
 ":" (this means that a ref name cannot have a colon in it).  A
 single pattern '<name>' is just a shorthand for '<name>:<name>'.
diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index 44c970c..ef8ef1c 100644
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -386,11 +386,13 @@
 	tree-ish to specify which branch should be searched).  When given a
 	tree-ish, returns the corresponding SVN revision number.
 +
+-B;;
 --before;;
 	Don't require an exact match if given an SVN revision, instead find
 	the commit corresponding to the state of the SVN repository (on the
 	current branch) at the specified revision.
 +
+-A;;
 --after;;
 	Don't require an exact match if given an SVN revision; if there is
 	not an exact match return the closest match searching forward in the
@@ -608,21 +610,6 @@
 	Make 'git svn' less verbose. Specify a second time to make it
 	even less verbose.
 
---repack[=<n>]::
---repack-flags=<flags>::
-	These should help keep disk usage sane for large fetches with
-	many revisions.
-+
---repack takes an optional argument for the number of revisions
-to fetch before repacking.  This defaults to repacking every
-1000 commits fetched if no argument is specified.
-+
---repack-flags are passed directly to 'git repack'.
-+
-[verse]
-config key: svn.repack
-config key: svn.repackflags
-
 -m::
 --merge::
 -s<strategy>::
diff --git a/Documentation/git.txt b/Documentation/git.txt
index de7b870..26de4dd 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -452,6 +452,11 @@
 	given will override values from configuration files.
 	The <name> is expected in the same format as listed by
 	'git config' (subkeys separated by dots).
++
+Note that omitting the `=` in `git -c foo.bar ...` is allowed and sets
+`foo.bar` to the boolean true value (just like `[foo]bar` would in a
+config file). Including the equals but with an empty value (like `git -c
+foo.bar= ...`) sets `foo.bar` to the empty string.
 
 --exec-path[=<path>]::
 	Path to wherever your core Git programs are installed.
diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 643c1ba..9b45bda 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -440,8 +440,8 @@
 
 	A path to which the `diff` attribute is unspecified
 	first gets its contents inspected, and if it looks like
-	text, it is treated as text.  Otherwise it would
-	generate `Binary files differ`.
+	text and is smaller than core.bigFileThreshold, it is treated
+	as text. Otherwise it would generate `Binary files differ`.
 
 String::
 
diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 85d6353..6c30723 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -115,18 +115,20 @@
 - '%aD': author date, RFC2822 style
 - '%ar': author date, relative
 - '%at': author date, UNIX timestamp
-- '%ai': author date, ISO 8601 format
+- '%ai': author date, ISO 8601-like format
+- '%aI': author date, strict ISO 8601 format
 - '%cn': committer name
 - '%cN': committer name (respecting .mailmap, see
   linkgit:git-shortlog[1] or linkgit:git-blame[1])
 - '%ce': committer email
 - '%cE': committer email (respecting .mailmap, see
   linkgit:git-shortlog[1] or linkgit:git-blame[1])
-- '%cd': committer date
+- '%cd': committer date (format respects --date= option)
 - '%cD': committer date, RFC2822 style
 - '%cr': committer date, relative
 - '%ct': committer date, UNIX timestamp
-- '%ci': committer date, ISO 8601 format
+- '%ci': committer date, ISO 8601-like format
+- '%cI': committer date, strict ISO 8601 format
 - '%d': ref names, like the --decorate option of linkgit:git-log[1]
 - '%e': encoding
 - '%s': subject
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index deb8cca..5d311b8 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -677,7 +677,7 @@
 --relative-date::
 	Synonym for `--date=relative`.
 
---date=(relative|local|default|iso|rfc|short|raw)::
+--date=(relative|local|default|iso|iso-strict|rfc|short|raw)::
 	Only takes effect for dates shown in human-readable format, such
 	as when using `--pretty`. `log.date` config variable sets a default
 	value for the log command's `--date` option.
@@ -687,7 +687,16 @@
 +
 `--date=local` shows timestamps in user's local time zone.
 +
-`--date=iso` (or `--date=iso8601`) shows timestamps in ISO 8601 format.
+`--date=iso` (or `--date=iso8601`) shows timestamps in a ISO 8601-like format.
+The differences to the strict ISO 8601 format are:
+
+	- a space instead of the `T` date/time delimiter
+	- a space between time and time zone
+	- no colon between hours and minutes of the time zone
+
++
+`--date=iso-strict` (or `--date=iso8601-strict`) shows timestamps in strict
+ISO 8601 format.
 +
 `--date=rfc` (or `--date=rfc2822`) shows timestamps in RFC 2822
 format, often found in email messages.
diff --git a/Documentation/technical/api-config.txt b/Documentation/technical/api-config.txt
index edd5018..0d8b99b 100644
--- a/Documentation/technical/api-config.txt
+++ b/Documentation/technical/api-config.txt
@@ -77,6 +77,99 @@
 `git_config_from_file`. This takes the same callback and data parameters
 as `git_config`.
 
+Querying For Specific Variables
+-------------------------------
+
+For programs wanting to query for specific variables in a non-callback
+manner, the config API provides two functions `git_config_get_value`
+and `git_config_get_value_multi`. They both read values from an internal
+cache generated previously from reading the config files.
+
+`int git_config_get_value(const char *key, const char **value)`::
+
+	Finds the highest-priority value for the configuration variable `key`,
+	stores the pointer to it in `value` and returns 0. When the
+	configuration variable `key` is not found, returns 1 without touching
+	`value`. The caller should not free or modify `value`, as it is owned
+	by the cache.
+
+`const struct string_list *git_config_get_value_multi(const char *key)`::
+
+	Finds and returns the value list, sorted in order of increasing priority
+	for the configuration variable `key`. When the configuration variable
+	`key` is not found, returns NULL. The caller should not free or modify
+	the returned pointer, as it is owned by the cache.
+
+`void git_config_clear(void)`::
+
+	Resets and invalidates the config cache.
+
+The config API also provides type specific API functions which do conversion
+as well as retrieval for the queried variable, including:
+
+`int git_config_get_int(const char *key, int *dest)`::
+
+	Finds and parses the value to an integer for the configuration variable
+	`key`. Dies on error; otherwise, stores the value of the parsed integer in
+	`dest` and returns 0. When the configuration variable `key` is not found,
+	returns 1 without touching `dest`.
+
+`int git_config_get_ulong(const char *key, unsigned long *dest)`::
+
+	Similar to `git_config_get_int` but for unsigned longs.
+
+`int git_config_get_bool(const char *key, int *dest)`::
+
+	Finds and parses the value into a boolean value, for the configuration
+	variable `key` respecting keywords like "true" and "false". Integer
+	values are converted into true/false values (when they are non-zero or
+	zero, respectively). Other values cause a die(). If parsing is successful,
+	stores the value of the parsed result in `dest` and returns 0. When the
+	configuration variable `key` is not found, returns 1 without touching
+	`dest`.
+
+`int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)`::
+
+	Similar to `git_config_get_bool`, except that integers are copied as-is,
+	and `is_bool` flag is unset.
+
+`int git_config_get_maybe_bool(const char *key, int *dest)`::
+
+	Similar to `git_config_get_bool`, except that it returns -1 on error
+	rather than dying.
+
+`int git_config_get_string_const(const char *key, const char **dest)`::
+
+	Allocates and copies the retrieved string into the `dest` parameter for
+	the configuration variable `key`; if NULL string is given, prints an
+	error message and returns -1. When the configuration variable `key` is
+	not found, returns 1 without touching `dest`.
+
+`int git_config_get_string(const char *key, char **dest)`::
+
+	Similar to `git_config_get_string_const`, except that retrieved value
+	copied into the `dest` parameter is a mutable string.
+
+`int git_config_get_pathname(const char *key, const char **dest)`::
+
+	Similar to `git_config_get_string`, but expands `~` or `~user` into
+	the user's home directory when found at the beginning of the path.
+
+`git_die_config(const char *key, const char *err, ...)`::
+
+	First prints the error message specified by the caller in `err` and then
+	dies printing the line number and the file name of the highest priority
+	value for the configuration variable `key`.
+
+`void git_die_config_linenr(const char *key, const char *filename, int linenr)`::
+
+	Helper function which formats the die error message according to the
+	parameters entered. Used by `git_die_config()`. It can be used by callers
+	handling `git_config_get_value_multi()` to print the correct error message
+	for the desired value.
+
+See test-config.c for usage examples.
+
 Value Parsing Helpers
 ---------------------
 
@@ -134,6 +227,68 @@
 `git_config` respects includes automatically. The lower-level
 `git_config_from_file` does not.
 
+Custom Configsets
+-----------------
+
+A `config_set` can be used to construct an in-memory cache for
+config-like files that the caller specifies (i.e., files like `.gitmodules`,
+`~/.gitconfig` etc.). For example,
+
+---------------------------------------
+struct config_set gm_config;
+git_configset_init(&gm_config);
+int b;
+/* we add config files to the config_set */
+git_configset_add_file(&gm_config, ".gitmodules");
+git_configset_add_file(&gm_config, ".gitmodules_alt");
+
+if (!git_configset_get_bool(gm_config, "submodule.frotz.ignore", &b)) {
+	/* hack hack hack */
+}
+
+/* when we are done with the configset */
+git_configset_clear(&gm_config);
+----------------------------------------
+
+Configset API provides functions for the above mentioned work flow, including:
+
+`void git_configset_init(struct config_set *cs)`::
+
+	Initializes the config_set `cs`.
+
+`int git_configset_add_file(struct config_set *cs, const char *filename)`::
+
+	Parses the file and adds the variable-value pairs to the `config_set`,
+	dies if there is an error in parsing the file. Returns 0 on success, or
+	-1 if the file does not exist or is inaccessible. The user has to decide
+	if he wants to free the incomplete configset or continue using it when
+	the function returns -1.
+
+`int git_configset_get_value(struct config_set *cs, const char *key, const char **value)`::
+
+	Finds the highest-priority value for the configuration variable `key`
+	and config set `cs`, stores the pointer to it in `value` and returns 0.
+	When the configuration variable `key` is not found, returns 1 without
+	touching `value`. The caller should not free or modify `value`, as it
+	is owned by the cache.
+
+`const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)`::
+
+	Finds and returns the value list, sorted in order of increasing priority
+	for the configuration variable `key` and config set `cs`. When the
+	configuration variable `key` is not found, returns NULL. The caller
+	should not free or modify the returned pointer, as it is owned by the cache.
+
+`void git_configset_clear(struct config_set *cs)`::
+
+	Clears `config_set` structure, removes all saved variable-value pairs.
+
+In addition to above functions, the `config_set` API provides type specific
+functions in the vein of `git_config_get_int` and family but with an extra
+parameter, pointer to struct `config_set`.
+They all behave similarly to the `git_config_get*()` family described in
+"Querying For Specific Variables" above.
+
 Writing Config Files
 --------------------
 
diff --git a/Documentation/technical/api-run-command.txt b/Documentation/technical/api-run-command.txt
index 69510ae..842b838 100644
--- a/Documentation/technical/api-run-command.txt
+++ b/Documentation/technical/api-run-command.txt
@@ -13,6 +13,10 @@
 Functions
 ---------
 
+`child_process_init`
+
+	Initialize a struct child_process variable.
+
 `start_command`::
 
 	Start a sub-process. Takes a pointer to a `struct child_process`
@@ -96,8 +100,8 @@
 
 The caller:
 
-1. allocates and clears (memset(&chld, 0, sizeof(chld));) a
-   struct child_process variable;
+1. allocates and clears (using child_process_init() or
+   CHILD_PROCESS_INIT) a struct child_process variable;
 2. initializes the members;
 3. calls start_command();
 4. processes the data;
diff --git a/Documentation/technical/api-strbuf.txt b/Documentation/technical/api-strbuf.txt
index f9c06a7..430302c 100644
--- a/Documentation/technical/api-strbuf.txt
+++ b/Documentation/technical/api-strbuf.txt
@@ -307,6 +307,16 @@
 	use it unless you need the correct position in the file
 	descriptor.
 
+`strbuf_getcwd`::
+
+	Set the buffer to the path of the current working directory.
+
+`strbuf_add_absolute_path`
+
+	Add a path to a buffer, converting a relative path to an
+	absolute one in the process.  Symbolic links are not
+	resolved.
+
 `stripspace`::
 
 	Strip whitespace from a buffer. The second parameter controls if
diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt
index 18dea8d..569c48a 100644
--- a/Documentation/technical/pack-protocol.txt
+++ b/Documentation/technical/pack-protocol.txt
@@ -467,7 +467,7 @@
 ----
   update-request    =  *shallow command-list [pack-file]
 
-  shallow           =  PKT-LINE("shallow" SP obj-id)
+  shallow           =  PKT-LINE("shallow" SP obj-id LF)
 
   command-list      =  PKT-LINE(command NUL capability-list LF)
 		       *PKT-LINE(command LF)
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index a4cdfbf..153d55d 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v2.1.0
+DEF_VER=v2.1.0.GIT
 
 LF='
 '
diff --git a/Makefile b/Makefile
index 9f984a9..d8284bd 100644
--- a/Makefile
+++ b/Makefile
@@ -317,9 +317,6 @@
 # dependency rules.  The default is "auto", which means to use computed header
 # dependencies if your compiler is detected to support it.
 #
-# Define CHECK_HEADER_DEPENDENCIES to check for problems in the hard-coded
-# dependency rules.
-#
 # Define NATIVE_CRLF if your platform uses CRLF for line endings.
 #
 # Define XDL_FAST_HASH to use an alternative line-hashing method in
@@ -432,7 +429,6 @@
 VCSSVN_OBJS =
 GENERATED_H =
 EXTRA_CPPFLAGS =
-LIB_H =
 LIB_OBJS =
 PROGRAM_OBJS =
 PROGRAMS =
@@ -551,6 +547,7 @@
 
 TEST_PROGRAMS_NEED_X += test-chmtime
 TEST_PROGRAMS_NEED_X += test-ctype
+TEST_PROGRAMS_NEED_X += test-config
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
@@ -631,131 +628,11 @@
 
 GENERATED_H += common-cmds.h
 
-LIB_H += advice.h
-LIB_H += archive.h
-LIB_H += argv-array.h
-LIB_H += attr.h
-LIB_H += bisect.h
-LIB_H += blob.h
-LIB_H += branch.h
-LIB_H += builtin.h
-LIB_H += bulk-checkin.h
-LIB_H += bundle.h
-LIB_H += cache-tree.h
-LIB_H += cache.h
-LIB_H += color.h
-LIB_H += column.h
-LIB_H += commit.h
-LIB_H += compat/bswap.h
-LIB_H += compat/mingw.h
-LIB_H += compat/obstack.h
-LIB_H += compat/poll/poll.h
-LIB_H += compat/precompose_utf8.h
-LIB_H += compat/terminal.h
-LIB_H += compat/win32/dirent.h
-LIB_H += compat/win32/pthread.h
-LIB_H += compat/win32/syslog.h
-LIB_H += connected.h
-LIB_H += convert.h
-LIB_H += credential.h
-LIB_H += csum-file.h
-LIB_H += decorate.h
-LIB_H += delta.h
-LIB_H += diff.h
-LIB_H += diffcore.h
-LIB_H += dir.h
-LIB_H += exec_cmd.h
-LIB_H += ewah/ewok.h
-LIB_H += ewah/ewok_rlw.h
-LIB_H += fetch-pack.h
-LIB_H += fmt-merge-msg.h
-LIB_H += fsck.h
-LIB_H += gettext.h
-LIB_H += git-compat-util.h
-LIB_H += gpg-interface.h
-LIB_H += graph.h
-LIB_H += grep.h
-LIB_H += hashmap.h
-LIB_H += help.h
-LIB_H += http.h
-LIB_H += kwset.h
-LIB_H += levenshtein.h
-LIB_H += line-log.h
-LIB_H += line-range.h
-LIB_H += list-objects.h
-LIB_H += ll-merge.h
-LIB_H += log-tree.h
-LIB_H += mailmap.h
-LIB_H += merge-blobs.h
-LIB_H += merge-recursive.h
-LIB_H += mergesort.h
-LIB_H += notes-cache.h
-LIB_H += notes-merge.h
-LIB_H += notes-utils.h
-LIB_H += notes.h
-LIB_H += object.h
-LIB_H += pack-objects.h
-LIB_H += pack-revindex.h
-LIB_H += pack.h
-LIB_H += pack-bitmap.h
-LIB_H += parse-options.h
-LIB_H += patch-ids.h
-LIB_H += pathspec.h
-LIB_H += pkt-line.h
-LIB_H += prio-queue.h
-LIB_H += progress.h
-LIB_H += prompt.h
-LIB_H += quote.h
-LIB_H += reachable.h
-LIB_H += reflog-walk.h
-LIB_H += refs.h
-LIB_H += remote.h
-LIB_H += rerere.h
-LIB_H += resolve-undo.h
-LIB_H += revision.h
-LIB_H += run-command.h
-LIB_H += send-pack.h
-LIB_H += sequencer.h
-LIB_H += sha1-array.h
-LIB_H += sha1-lookup.h
-LIB_H += shortlog.h
-LIB_H += sideband.h
-LIB_H += sigchain.h
-LIB_H += strbuf.h
-LIB_H += streaming.h
-LIB_H += string-list.h
-LIB_H += submodule.h
-LIB_H += tag.h
-LIB_H += tar.h
-LIB_H += thread-utils.h
-LIB_H += transport.h
-LIB_H += tree-walk.h
-LIB_H += tree.h
-LIB_H += unpack-trees.h
-LIB_H += unicode_width.h
-LIB_H += url.h
-LIB_H += urlmatch.h
-LIB_H += userdiff.h
-LIB_H += utf8.h
-LIB_H += varint.h
-LIB_H += vcs-svn/fast_export.h
-LIB_H += vcs-svn/line_buffer.h
-LIB_H += vcs-svn/repo_tree.h
-LIB_H += vcs-svn/sliding_window.h
-LIB_H += vcs-svn/svndiff.h
-LIB_H += vcs-svn/svndump.h
-LIB_H += walker.h
-LIB_H += wildmatch.h
-LIB_H += wt-status.h
-LIB_H += xdiff-interface.h
-LIB_H += xdiff/xdiff.h
-LIB_H += xdiff/xdiffi.h
-LIB_H += xdiff/xemit.h
-LIB_H += xdiff/xinclude.h
-LIB_H += xdiff/xmacros.h
-LIB_H += xdiff/xprepare.h
-LIB_H += xdiff/xtypes.h
-LIB_H += xdiff/xutils.h
+LIB_H = $(shell $(FIND) . \
+	-name .git -prune -o \
+	-name t -prune -o \
+	-name Documentation -prune -o \
+	-name '*.h' -print)
 
 LIB_OBJS += abspath.o
 LIB_OBJS += advice.o
@@ -1025,11 +902,6 @@
 endif
 endif
 
-ifdef CHECK_HEADER_DEPENDENCIES
-COMPUTE_HEADER_DEPENDENCIES = no
-USE_COMPUTED_HEADER_DEPENDENCIES =
-endif
-
 ifndef COMPUTE_HEADER_DEPENDENCIES
 COMPUTE_HEADER_DEPENDENCIES = auto
 endif
@@ -1381,7 +1253,6 @@
 endif
 ifndef NO_UNIX_SOCKETS
 	LIB_OBJS += unix-socket.o
-	LIB_H += unix-socket.h
 	PROGRAM_OBJS += credential-cache.o
 	PROGRAM_OBJS += credential-cache--daemon.o
 endif
@@ -1405,12 +1276,10 @@
 ifdef BLK_SHA1
 	SHA1_HEADER = "block-sha1/sha1.h"
 	LIB_OBJS += block-sha1/sha1.o
-	LIB_H += block-sha1/sha1.h
 else
 ifdef PPC_SHA1
 	SHA1_HEADER = "ppc/sha1.h"
 	LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
-	LIB_H += ppc/sha1.h
 else
 ifdef APPLE_COMMON_CRYPTO
 	COMPAT_CFLAGS += -DCOMMON_DIGEST_FOR_OPENSSL
@@ -1479,6 +1348,9 @@
 	COMPAT_CFLAGS += -Icompat/regex
 	COMPAT_OBJS += compat/regex/regex.o
 endif
+ifdef NATIVE_CRLF
+	BASIC_CFLAGS += -DNATIVE_CRLF
+endif
 
 ifdef USE_NED_ALLOCATOR
        COMPAT_CFLAGS += -Icompat/nedmalloc
@@ -1937,29 +1809,13 @@
 missing_dep_dirs := $(filter-out $(wildcard $(dep_dirs)),$(dep_dirs))
 dep_file = $(dir $@).depend/$(notdir $@).d
 dep_args = -MF $(dep_file) -MQ $@ -MMD -MP
-ifdef CHECK_HEADER_DEPENDENCIES
-$(error cannot compute header dependencies outside a normal build. \
-Please unset CHECK_HEADER_DEPENDENCIES and try again)
-endif
 endif
 
 ifneq ($(COMPUTE_HEADER_DEPENDENCIES),yes)
-ifndef CHECK_HEADER_DEPENDENCIES
 dep_dirs =
 missing_dep_dirs =
 dep_args =
 endif
-endif
-
-ifdef CHECK_HEADER_DEPENDENCIES
-ifndef PRINT_HEADER_DEPENDENCIES
-missing_deps = $(filter-out $(notdir $^), \
-	$(notdir $(shell $(MAKE) -s $@ \
-		CHECK_HEADER_DEPENDENCIES=YesPlease \
-		USE_COMPUTED_HEADER_DEPENDENCIES=YesPlease \
-		PRINT_HEADER_DEPENDENCIES=YesPlease)))
-endif
-endif
 
 ASM_SRC := $(wildcard $(OBJECTS:o=S))
 ASM_OBJ := $(ASM_SRC:S=o)
@@ -1967,45 +1823,10 @@
 
 .SUFFIXES:
 
-ifdef PRINT_HEADER_DEPENDENCIES
-$(C_OBJ): %.o: %.c FORCE
-	echo $^
-$(ASM_OBJ): %.o: %.S FORCE
-	echo $^
-
-ifndef CHECK_HEADER_DEPENDENCIES
-$(error cannot print header dependencies during a normal build. \
-Please set CHECK_HEADER_DEPENDENCIES and try again)
-endif
-endif
-
-ifndef PRINT_HEADER_DEPENDENCIES
-ifdef CHECK_HEADER_DEPENDENCIES
-$(C_OBJ): %.o: %.c $(dep_files) FORCE
-	@set -e; echo CHECK $@; \
-	missing_deps="$(missing_deps)"; \
-	if test "$$missing_deps"; \
-	then \
-		echo missing dependencies: $$missing_deps; \
-		false; \
-	fi
-$(ASM_OBJ): %.o: %.S $(dep_files) FORCE
-	@set -e; echo CHECK $@; \
-	missing_deps="$(missing_deps)"; \
-	if test "$$missing_deps"; \
-	then \
-		echo missing dependencies: $$missing_deps; \
-		false; \
-	fi
-endif
-endif
-
-ifndef CHECK_HEADER_DEPENDENCIES
 $(C_OBJ): %.o: %.c GIT-CFLAGS $(missing_dep_dirs)
 	$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $<
 $(ASM_OBJ): %.o: %.S GIT-CFLAGS $(missing_dep_dirs)
 	$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $<
-endif
 
 %.s: %.c GIT-CFLAGS FORCE
 	$(QUIET_CC)$(CC) -o $@ -S $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $<
@@ -2132,9 +1953,9 @@
 XGETTEXT_FLAGS_SH = $(XGETTEXT_FLAGS) --language=Shell \
 	--keyword=gettextln --keyword=eval_gettextln
 XGETTEXT_FLAGS_PERL = $(XGETTEXT_FLAGS) --keyword=__ --language=Perl
-LOCALIZED_C := $(C_OBJ:o=c) $(LIB_H) $(GENERATED_H)
-LOCALIZED_SH := $(SCRIPT_SH)
-LOCALIZED_PERL := $(SCRIPT_PERL)
+LOCALIZED_C = $(C_OBJ:o=c) $(LIB_H) $(GENERATED_H)
+LOCALIZED_SH = $(SCRIPT_SH)
+LOCALIZED_PERL = $(SCRIPT_PERL)
 
 ifdef XGETTEXT_INCLUDE_TESTS
 LOCALIZED_C += t/t0200/test.c
@@ -2142,7 +1963,7 @@
 LOCALIZED_PERL += t/t0200/test.perl
 endif
 
-po/git.pot: $(LOCALIZED_C)
+po/git.pot: $(GENERATED_H) FORCE
 	$(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ $(XGETTEXT_FLAGS_C) $(LOCALIZED_C)
 	$(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ --join-existing $(XGETTEXT_FLAGS_SH) \
 		$(LOCALIZED_SH)
diff --git a/RelNotes b/RelNotes
index bf76091..c473b35 120000
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/2.1.0.txt
\ No newline at end of file
+Documentation/RelNotes/2.2.0.txt
\ No newline at end of file
diff --git a/abspath.c b/abspath.c
index ca33558..5edb4e7 100644
--- a/abspath.c
+++ b/abspath.c
@@ -33,7 +33,7 @@
  */
 static const char *real_path_internal(const char *path, int die_on_error)
 {
-	static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
+	static struct strbuf sb = STRBUF_INIT;
 	char *retval = NULL;
 
 	/*
@@ -41,16 +41,14 @@
 	 * here so that we can chdir() back to it at the end of the
 	 * function:
 	 */
-	char cwd[1024] = "";
-
-	int buf_index = 1;
+	struct strbuf cwd = STRBUF_INIT;
 
 	int depth = MAXDEPTH;
 	char *last_elem = NULL;
 	struct stat st;
 
 	/* We've already done it */
-	if (path == buf || path == next_buf)
+	if (path == sb.buf)
 		return path;
 
 	if (!*path) {
@@ -60,41 +58,38 @@
 			goto error_out;
 	}
 
-	if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) {
-		if (die_on_error)
-			die("Too long path: %.*s", 60, path);
-		else
-			goto error_out;
-	}
+	strbuf_reset(&sb);
+	strbuf_addstr(&sb, path);
 
 	while (depth--) {
-		if (!is_directory(buf)) {
-			char *last_slash = find_last_dir_sep(buf);
+		if (!is_directory(sb.buf)) {
+			char *last_slash = find_last_dir_sep(sb.buf);
 			if (last_slash) {
 				last_elem = xstrdup(last_slash + 1);
-				last_slash[1] = '\0';
+				strbuf_setlen(&sb, last_slash - sb.buf + 1);
 			} else {
-				last_elem = xstrdup(buf);
-				*buf = '\0';
+				last_elem = xmemdupz(sb.buf, sb.len);
+				strbuf_reset(&sb);
 			}
 		}
 
-		if (*buf) {
-			if (!*cwd && !getcwd(cwd, sizeof(cwd))) {
+		if (sb.len) {
+			if (!cwd.len && strbuf_getcwd(&cwd)) {
 				if (die_on_error)
 					die_errno("Could not get current working directory");
 				else
 					goto error_out;
 			}
 
-			if (chdir(buf)) {
+			if (chdir(sb.buf)) {
 				if (die_on_error)
-					die_errno("Could not switch to '%s'", buf);
+					die_errno("Could not switch to '%s'",
+						  sb.buf);
 				else
 					goto error_out;
 			}
 		}
-		if (!getcwd(buf, PATH_MAX)) {
+		if (strbuf_getcwd(&sb)) {
 			if (die_on_error)
 				die_errno("Could not get current working directory");
 			else
@@ -102,48 +97,35 @@
 		}
 
 		if (last_elem) {
-			size_t len = strlen(buf);
-			if (len + strlen(last_elem) + 2 > PATH_MAX) {
-				if (die_on_error)
-					die("Too long path name: '%s/%s'",
-					    buf, last_elem);
-				else
-					goto error_out;
-			}
-			if (len && !is_dir_sep(buf[len - 1]))
-				buf[len++] = '/';
-			strcpy(buf + len, last_elem);
+			if (sb.len && !is_dir_sep(sb.buf[sb.len - 1]))
+				strbuf_addch(&sb, '/');
+			strbuf_addstr(&sb, last_elem);
 			free(last_elem);
 			last_elem = NULL;
 		}
 
-		if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
-			ssize_t len = readlink(buf, next_buf, PATH_MAX);
+		if (!lstat(sb.buf, &st) && S_ISLNK(st.st_mode)) {
+			struct strbuf next_sb = STRBUF_INIT;
+			ssize_t len = strbuf_readlink(&next_sb, sb.buf, 0);
 			if (len < 0) {
 				if (die_on_error)
-					die_errno("Invalid symlink '%s'", buf);
+					die_errno("Invalid symlink '%s'",
+						  sb.buf);
 				else
 					goto error_out;
 			}
-			if (PATH_MAX <= len) {
-				if (die_on_error)
-					die("symbolic link too long: %s", buf);
-				else
-					goto error_out;
-			}
-			next_buf[len] = '\0';
-			buf = next_buf;
-			buf_index = 1 - buf_index;
-			next_buf = bufs[buf_index];
+			strbuf_swap(&sb, &next_sb);
+			strbuf_release(&next_sb);
 		} else
 			break;
 	}
 
-	retval = buf;
+	retval = sb.buf;
 error_out:
 	free(last_elem);
-	if (*cwd && chdir(cwd))
-		die_errno("Could not change back to '%s'", cwd);
+	if (cwd.len && chdir(cwd.buf))
+		die_errno("Could not change back to '%s'", cwd.buf);
+	strbuf_release(&cwd);
 
 	return retval;
 }
@@ -158,54 +140,16 @@
 	return real_path_internal(path, 0);
 }
 
-static const char *get_pwd_cwd(void)
-{
-	static char cwd[PATH_MAX + 1];
-	char *pwd;
-	struct stat cwd_stat, pwd_stat;
-	if (getcwd(cwd, PATH_MAX) == NULL)
-		return NULL;
-	pwd = getenv("PWD");
-	if (pwd && strcmp(pwd, cwd)) {
-		stat(cwd, &cwd_stat);
-		if ((cwd_stat.st_dev || cwd_stat.st_ino) &&
-		    !stat(pwd, &pwd_stat) &&
-		    pwd_stat.st_dev == cwd_stat.st_dev &&
-		    pwd_stat.st_ino == cwd_stat.st_ino) {
-			strlcpy(cwd, pwd, PATH_MAX);
-		}
-	}
-	return cwd;
-}
-
 /*
  * Use this to get an absolute path from a relative one. If you want
  * to resolve links, you should use real_path.
- *
- * If the path is already absolute, then return path. As the user is
- * never meant to free the return value, we're safe.
  */
 const char *absolute_path(const char *path)
 {
-	static char buf[PATH_MAX + 1];
-
-	if (!*path) {
-		die("The empty string is not a valid path");
-	} else if (is_absolute_path(path)) {
-		if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
-			die("Too long path: %.*s", 60, path);
-	} else {
-		size_t len;
-		const char *fmt;
-		const char *cwd = get_pwd_cwd();
-		if (!cwd)
-			die_errno("Cannot determine the current working directory");
-		len = strlen(cwd);
-		fmt = (len > 0 && is_dir_sep(cwd[len - 1])) ? "%s%s" : "%s/%s";
-		if (snprintf(buf, PATH_MAX, fmt, cwd, path) >= PATH_MAX)
-			die("Too long path: %.*s", 60, path);
-	}
-	return buf;
+	static struct strbuf sb = STRBUF_INIT;
+	strbuf_reset(&sb);
+	strbuf_add_absolute_path(&sb, path);
+	return sb.buf;
 }
 
 /*
diff --git a/advice.c b/advice.c
index 9b42033..3b8bf3c 100644
--- a/advice.c
+++ b/advice.c
@@ -86,8 +86,7 @@
 		 * other commands doing a merge do.
 		 */
 		advise(_("Fix them up in the work tree, and then use 'git add/rm <file>'\n"
-			 "as appropriate to mark resolution and make a commit, or use\n"
-			 "'git commit -a'."));
+			 "as appropriate to mark resolution and make a commit."));
 	return -1;
 }
 
diff --git a/alias.c b/alias.c
index 758c867..6aa164a 100644
--- a/alias.c
+++ b/alias.c
@@ -1,26 +1,13 @@
 #include "cache.h"
 
-static const char *alias_key;
-static char *alias_val;
-
-static int alias_lookup_cb(const char *k, const char *v, void *cb)
-{
-	const char *name;
-	if (skip_prefix(k, "alias.", &name) && !strcmp(name, alias_key)) {
-		if (!v)
-			return config_error_nonbool(k);
-		alias_val = xstrdup(v);
-		return 0;
-	}
-	return 0;
-}
-
 char *alias_lookup(const char *alias)
 {
-	alias_key = alias;
-	alias_val = NULL;
-	git_config(alias_lookup_cb, NULL);
-	return alias_val;
+	char *v = NULL;
+	struct strbuf key = STRBUF_INIT;
+	strbuf_addf(&key, "alias.%s", alias);
+	git_config_get_string(key.buf, &v);
+	strbuf_release(&key);
+	return v;
 }
 
 #define SPLIT_CMDLINE_BAD_ENDING 1
diff --git a/archive-tar.c b/archive-tar.c
index 719b629..df2f4c8 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -192,7 +192,7 @@
 	unsigned int mode;
 	memset(&header, 0, sizeof(header));
 	*header.typeflag = TYPEFLAG_EXT_HEADER;
-	mode = 0100666;
+	mode = 0100666 & ~tar_umask;
 	sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
 	prepare_header(args, &header, mode, size);
 	write_blocked(&header, sizeof(header));
@@ -300,7 +300,7 @@
 	strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
 	memset(&header, 0, sizeof(header));
 	*header.typeflag = TYPEFLAG_GLOBAL_HEADER;
-	mode = 0100666;
+	mode = 0100666 & ~tar_umask;
 	strcpy(header.name, "pax_global_header");
 	prepare_header(args, &header, mode, ext_header.len);
 	write_blocked(&header, sizeof(header));
@@ -395,7 +395,7 @@
 				    struct archiver_args *args)
 {
 	struct strbuf cmd = STRBUF_INIT;
-	struct child_process filter;
+	struct child_process filter = CHILD_PROCESS_INIT;
 	const char *argv[2];
 	int r;
 
@@ -406,7 +406,6 @@
 	if (args->compression_level >= 0)
 		strbuf_addf(&cmd, " -%d", args->compression_level);
 
-	memset(&filter, 0, sizeof(filter));
 	argv[0] = cmd.buf;
 	argv[1] = NULL;
 	filter.argv = argv;
diff --git a/archive.c b/archive.c
index 3fc0fb2..952a659 100644
--- a/archive.c
+++ b/archive.c
@@ -402,14 +402,6 @@
 	return argc;
 }
 
-static int git_default_archive_config(const char *var, const char *value,
-				      void *cb)
-{
-	if (!strcmp(var, "uploadarchive.allowunreachable"))
-		remote_allow_unreachable = git_config_bool(var, value);
-	return git_default_config(var, value, cb);
-}
-
 int write_archive(int argc, const char **argv, const char *prefix,
 		  int setup_prefix, const char *name_hint, int remote)
 {
@@ -420,7 +412,9 @@
 	if (setup_prefix && prefix == NULL)
 		prefix = setup_git_directory_gently(&nongit);
 
-	git_config(git_default_archive_config, NULL);
+	git_config_get_bool("uploadarchive.allowunreachable", &remote_allow_unreachable);
+	git_config(git_default_config, NULL);
+
 	init_tar_archiver();
 	init_zip_archiver();
 
diff --git a/bisect.c b/bisect.c
index d6e851d..df09cbc 100644
--- a/bisect.c
+++ b/bisect.c
@@ -215,11 +215,12 @@
 	}
 	qsort(array, cnt, sizeof(*array), compare_commit_dist);
 	for (p = list, i = 0; i < cnt; i++) {
-		struct name_decoration *r = xmalloc(sizeof(*r) + 100);
+		char buf[100]; /* enough for dist=%d */
 		struct object *obj = &(array[i].commit->object);
 
-		sprintf(r->name, "dist=%d", array[i].distance);
-		r->next = add_decoration(&name_decoration, obj, r);
+		snprintf(buf, sizeof(buf), "dist=%d", array[i].distance);
+		add_name_decoration(DECORATION_NONE, buf, obj);
+
 		p->item = array[i].commit;
 		p = p->next;
 	}
diff --git a/branch.c b/branch.c
index 46e8aa8..9a2228e 100644
--- a/branch.c
+++ b/branch.c
@@ -140,33 +140,17 @@
 	return 0;
 }
 
-struct branch_desc_cb {
-	const char *config_name;
-	const char *value;
-};
-
-static int read_branch_desc_cb(const char *var, const char *value, void *cb)
-{
-	struct branch_desc_cb *desc = cb;
-	if (strcmp(desc->config_name, var))
-		return 0;
-	free((char *)desc->value);
-	return git_config_string(&desc->value, var, value);
-}
-
 int read_branch_desc(struct strbuf *buf, const char *branch_name)
 {
-	struct branch_desc_cb cb;
+	char *v = NULL;
 	struct strbuf name = STRBUF_INIT;
 	strbuf_addf(&name, "branch.%s.description", branch_name);
-	cb.config_name = name.buf;
-	cb.value = NULL;
-	if (git_config(read_branch_desc_cb, &cb) < 0) {
+	if (git_config_get_string(name.buf, &v)) {
 		strbuf_release(&name);
 		return -1;
 	}
-	if (cb.value)
-		strbuf_addstr(buf, cb.value);
+	strbuf_addstr(buf, v);
+	free(v);
 	strbuf_release(&name);
 	return 0;
 }
@@ -226,7 +210,6 @@
 		   int force, int reflog, int clobber_head,
 		   int quiet, enum branch_track track)
 {
-	struct ref_lock *lock = NULL;
 	struct commit *commit;
 	unsigned char sha1[20];
 	char *real_ref, msg[PATH_MAX + 20];
@@ -285,15 +268,6 @@
 		die(_("Not a valid branch point: '%s'."), start_name);
 	hashcpy(sha1, commit->object.sha1);
 
-	if (!dont_change_ref) {
-		lock = lock_any_ref_for_update(ref.buf, NULL, 0, NULL);
-		if (!lock)
-			die_errno(_("Failed to lock ref for update"));
-	}
-
-	if (reflog)
-		log_all_ref_updates = 1;
-
 	if (forcing)
 		snprintf(msg, sizeof msg, "branch: Reset to %s",
 			 start_name);
@@ -301,13 +275,26 @@
 		snprintf(msg, sizeof msg, "branch: Created from %s",
 			 start_name);
 
+	if (reflog)
+		log_all_ref_updates = 1;
+
+	if (!dont_change_ref) {
+		struct ref_transaction *transaction;
+		struct strbuf err = STRBUF_INIT;
+
+		transaction = ref_transaction_begin(&err);
+		if (!transaction ||
+		    ref_transaction_update(transaction, ref.buf, sha1,
+					   null_sha1, 0, !forcing, &err) ||
+		    ref_transaction_commit(transaction, msg, &err))
+			die("%s", err.buf);
+		ref_transaction_free(transaction);
+		strbuf_release(&err);
+	}
+
 	if (real_ref && track)
 		setup_tracking(ref.buf + 11, real_ref, track, quiet);
 
-	if (!dont_change_ref)
-		if (write_ref_sha1(lock, sha1, msg) < 0)
-			die_errno(_("Failed to write ref"));
-
 	strbuf_release(&ref);
 	free(real_ref);
 }
diff --git a/builtin/add.c b/builtin/add.c
index 4baf3a5..352b85e 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -180,7 +180,7 @@
 	char *file = git_pathdup("ADD_EDIT.patch");
 	const char *apply_argv[] = { "apply", "--recount", "--cached",
 		NULL, NULL };
-	struct child_process child;
+	struct child_process child = CHILD_PROCESS_INIT;
 	struct rev_info rev;
 	int out;
 	struct stat st;
@@ -214,7 +214,6 @@
 	if (!st.st_size)
 		die(_("Empty patch. Aborted."));
 
-	memset(&child, 0, sizeof(child));
 	child.git_cmd = 1;
 	child.argv = apply_argv;
 	if (run_command(&child))
diff --git a/builtin/apply.c b/builtin/apply.c
index be2b4ce..f204cca 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -1920,6 +1920,66 @@
 	return used;
 }
 
+static void prefix_one(char **name)
+{
+	char *old_name = *name;
+	if (!old_name)
+		return;
+	*name = xstrdup(prefix_filename(prefix, prefix_length, *name));
+	free(old_name);
+}
+
+static void prefix_patch(struct patch *p)
+{
+	if (!prefix || p->is_toplevel_relative)
+		return;
+	prefix_one(&p->new_name);
+	prefix_one(&p->old_name);
+}
+
+/*
+ * include/exclude
+ */
+
+static struct string_list limit_by_name;
+static int has_include;
+static void add_name_limit(const char *name, int exclude)
+{
+	struct string_list_item *it;
+
+	it = string_list_append(&limit_by_name, name);
+	it->util = exclude ? NULL : (void *) 1;
+}
+
+static int use_patch(struct patch *p)
+{
+	const char *pathname = p->new_name ? p->new_name : p->old_name;
+	int i;
+
+	/* Paths outside are not touched regardless of "--include" */
+	if (0 < prefix_length) {
+		int pathlen = strlen(pathname);
+		if (pathlen <= prefix_length ||
+		    memcmp(prefix, pathname, prefix_length))
+			return 0;
+	}
+
+	/* See if it matches any of exclude/include rule */
+	for (i = 0; i < limit_by_name.nr; i++) {
+		struct string_list_item *it = &limit_by_name.items[i];
+		if (!wildmatch(it->string, pathname, 0, NULL))
+			return (it->util != NULL);
+	}
+
+	/*
+	 * If we had any include, a path that does not match any rule is
+	 * not used.  Otherwise, we saw bunch of exclude rules (or none)
+	 * and such a path is used.
+	 */
+	return !has_include;
+}
+
+
 /*
  * Read the patch text in "buffer" that extends for "size" bytes; stop
  * reading after seeing a single patch (i.e. changes to a single file).
@@ -1935,9 +1995,14 @@
 	if (offset < 0)
 		return offset;
 
-	patch->ws_rule = whitespace_rule(patch->new_name
-					 ? patch->new_name
-					 : patch->old_name);
+	prefix_patch(patch);
+
+	if (!use_patch(patch))
+		patch->ws_rule = 0;
+	else
+		patch->ws_rule = whitespace_rule(patch->new_name
+						 ? patch->new_name
+						 : patch->old_name);
 
 	patchsize = parse_single_patch(buffer + offset + hdrsize,
 				       size - offset - hdrsize, patch);
@@ -4127,64 +4192,6 @@
 
 static struct lock_file lock_file;
 
-static struct string_list limit_by_name;
-static int has_include;
-static void add_name_limit(const char *name, int exclude)
-{
-	struct string_list_item *it;
-
-	it = string_list_append(&limit_by_name, name);
-	it->util = exclude ? NULL : (void *) 1;
-}
-
-static int use_patch(struct patch *p)
-{
-	const char *pathname = p->new_name ? p->new_name : p->old_name;
-	int i;
-
-	/* Paths outside are not touched regardless of "--include" */
-	if (0 < prefix_length) {
-		int pathlen = strlen(pathname);
-		if (pathlen <= prefix_length ||
-		    memcmp(prefix, pathname, prefix_length))
-			return 0;
-	}
-
-	/* See if it matches any of exclude/include rule */
-	for (i = 0; i < limit_by_name.nr; i++) {
-		struct string_list_item *it = &limit_by_name.items[i];
-		if (!wildmatch(it->string, pathname, 0, NULL))
-			return (it->util != NULL);
-	}
-
-	/*
-	 * If we had any include, a path that does not match any rule is
-	 * not used.  Otherwise, we saw bunch of exclude rules (or none)
-	 * and such a path is used.
-	 */
-	return !has_include;
-}
-
-
-static void prefix_one(char **name)
-{
-	char *old_name = *name;
-	if (!old_name)
-		return;
-	*name = xstrdup(prefix_filename(prefix, prefix_length, *name));
-	free(old_name);
-}
-
-static void prefix_patches(struct patch *p)
-{
-	if (!prefix || p->is_toplevel_relative)
-		return;
-	for ( ; p; p = p->next) {
-		prefix_one(&p->new_name);
-		prefix_one(&p->old_name);
-	}
-}
-
 #define INACCURATE_EOF	(1<<0)
 #define RECOUNT		(1<<1)
 
@@ -4210,8 +4217,6 @@
 			break;
 		if (apply_in_reverse)
 			reverse_patches(patch);
-		if (prefix)
-			prefix_patches(patch);
 		if (use_patch(patch)) {
 			patch_stats(patch);
 			*listp = patch;
@@ -4269,13 +4274,11 @@
 	return 0;
 }
 
-static int git_apply_config(const char *var, const char *value, void *cb)
+static void git_apply_config(void)
 {
-	if (!strcmp(var, "apply.whitespace"))
-		return git_config_string(&apply_default_whitespace, var, value);
-	else if (!strcmp(var, "apply.ignorewhitespace"))
-		return git_config_string(&apply_default_ignorewhitespace, var, value);
-	return git_default_config(var, value, cb);
+	git_config_get_string_const("apply.whitespace", &apply_default_whitespace);
+	git_config_get_string_const("apply.ignorewhitespace", &apply_default_ignorewhitespace);
+	git_config(git_default_config, NULL);
 }
 
 static int option_parse_exclude(const struct option *opt,
@@ -4423,7 +4426,7 @@
 
 	prefix = prefix_;
 	prefix_length = prefix ? strlen(prefix) : 0;
-	git_config(git_apply_config, NULL);
+	git_apply_config();
 	if (apply_default_whitespace)
 		parse_whitespace_option(apply_default_whitespace);
 	if (apply_default_ignorewhitespace)
diff --git a/builtin/blame.c b/builtin/blame.c
index 17d30d0..3838be2 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -2580,6 +2580,9 @@
 	case DATE_RFC2822:
 		blame_date_width = sizeof("Thu, 19 Oct 2006 16:00:04 -0700");
 		break;
+	case DATE_ISO8601_STRICT:
+		blame_date_width = sizeof("2006-10-19T16:00:04-07:00");
+		break;
 	case DATE_ISO8601:
 		blame_date_width = sizeof("2006-10-19 16:00:04 -0700");
 		break;
@@ -2700,7 +2703,7 @@
 	 * uninteresting.
 	 */
 	if (prepare_revision_walk(&revs))
-		die("revision walk setup failed");
+		die(_("revision walk setup failed"));
 
 	if (is_null_sha1(sb.final->object.sha1)) {
 		o = sb.final->util;
diff --git a/builtin/branch.c b/builtin/branch.c
index 0591b22..ced422b 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -653,7 +653,9 @@
 		add_pending_object(&ref_list.revs,
 				   (struct object *) filter, "");
 		ref_list.revs.limited = 1;
-		prepare_revision_walk(&ref_list.revs);
+
+		if (prepare_revision_walk(&ref_list.revs))
+			die(_("revision walk setup failed"));
 		if (verbose)
 			ref_list.maxwidth = calc_maxwidth(&ref_list);
 	}
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f71e745..8afdf2b 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -552,6 +552,12 @@
 		}
 	}
 
+	if (!active_cache_tree)
+		active_cache_tree = cache_tree();
+
+	if (!cache_tree_fully_valid(active_cache_tree))
+		cache_tree_update(&the_index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR);
+
 	if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
diff --git a/builtin/clean.c b/builtin/clean.c
index 1032563..3beeea6 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -67,7 +67,7 @@
 	char hotkey;
 	const char *title;
 	int selected;
-	int (*fn)();
+	int (*fn)(void);
 };
 
 enum menu_stuff_type {
diff --git a/builtin/clone.c b/builtin/clone.c
index bbd169c..3927edf 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -685,9 +685,10 @@
 	}
 }
 
-static void write_refspec_config(const char* src_ref_prefix,
-		const struct ref* our_head_points_at,
-		const struct ref* remote_head_points_at, struct strbuf* branch_top)
+static void write_refspec_config(const char *src_ref_prefix,
+		const struct ref *our_head_points_at,
+		const struct ref *remote_head_points_at,
+		struct strbuf *branch_top)
 {
 	struct strbuf key = STRBUF_INIT;
 	struct strbuf value = STRBUF_INIT;
@@ -1004,5 +1005,7 @@
 	strbuf_release(&key);
 	strbuf_release(&value);
 	junk_mode = JUNK_LEAVE_ALL;
+
+	free(refspec);
 	return err;
 }
diff --git a/builtin/commit.c b/builtin/commit.c
index 5ed6036..b0fe784 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -42,7 +42,20 @@
 	NULL
 };
 
-static const char implicit_ident_advice[] =
+static const char implicit_ident_advice_noconfig[] =
+N_("Your name and email address were configured automatically based\n"
+"on your username and hostname. Please check that they are accurate.\n"
+"You can suppress this message by setting them explicitly. Run the\n"
+"following command and follow the instructions in your editor to edit\n"
+"your configuration file:\n"
+"\n"
+"    git config --global --edit\n"
+"\n"
+"After doing this, you may fix the identity used for this commit with:\n"
+"\n"
+"    git commit --amend --reset-author\n");
+
+static const char implicit_ident_advice_config[] =
 N_("Your name and email address were configured automatically based\n"
 "on your username and hostname. Please check that they are accurate.\n"
 "You can suppress this message by setting them explicitly:\n"
@@ -340,6 +353,13 @@
 
 		discard_cache();
 		read_cache_from(index_lock.filename);
+		if (update_main_cache_tree(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, CLOSE_LOCK))
+				die(_("unable to update temporary index"));
+		} else
+			warning(_("Failed to update main cache tree"));
 
 		commit_style = COMMIT_NORMAL;
 		return index_lock.filename;
@@ -380,8 +400,12 @@
 	if (!only && !pathspec.nr) {
 		hold_locked_index(&index_lock, 1);
 		refresh_cache_or_die(refresh_flags);
-		if (active_cache_changed) {
+		if (active_cache_changed
+		    || !cache_tree_fully_valid(active_cache_tree)) {
 			update_main_cache_tree(WRITE_TREE_SILENT);
+			active_cache_changed = 1;
+		}
+		if (active_cache_changed) {
 			if (write_locked_index(&the_index, &index_lock,
 					       COMMIT_LOCK))
 				die(_("unable to write new_index file"));
@@ -431,6 +455,7 @@
 	hold_locked_index(&index_lock, 1);
 	add_remove_files(&partial);
 	refresh_cache(REFRESH_QUIET);
+	update_main_cache_tree(WRITE_TREE_SILENT);
 	if (write_locked_index(&the_index, &index_lock, CLOSE_LOCK))
 		die(_("unable to write new_index file"));
 
@@ -520,77 +545,80 @@
 	return 1;
 }
 
-static int parse_force_date(const char *in, char *out, int len)
+static int parse_force_date(const char *in, struct strbuf *out)
 {
-	if (len < 1)
-		return -1;
-	*out++ = '@';
-	len--;
+	strbuf_addch(out, '@');
 
-	if (parse_date(in, out, len) < 0) {
+	if (parse_date(in, out) < 0) {
 		int errors = 0;
 		unsigned long t = approxidate_careful(in, &errors);
 		if (errors)
 			return -1;
-		snprintf(out, len, "%lu", t);
+		strbuf_addf(out, "%lu", t);
 	}
 
 	return 0;
 }
 
+static void set_ident_var(char **buf, char *val)
+{
+	free(*buf);
+	*buf = val;
+}
+
+static char *envdup(const char *var)
+{
+	const char *val = getenv(var);
+	return val ? xstrdup(val) : NULL;
+}
+
 static void determine_author_info(struct strbuf *author_ident)
 {
 	char *name, *email, *date;
 	struct ident_split author;
-	char date_buf[64];
 
-	name = getenv("GIT_AUTHOR_NAME");
-	email = getenv("GIT_AUTHOR_EMAIL");
-	date = getenv("GIT_AUTHOR_DATE");
+	name = envdup("GIT_AUTHOR_NAME");
+	email = envdup("GIT_AUTHOR_EMAIL");
+	date = envdup("GIT_AUTHOR_DATE");
 
 	if (author_message) {
-		const char *a, *lb, *rb, *eol;
+		struct ident_split ident;
 		size_t len;
+		const char *a;
 
-		a = strstr(author_message_buffer, "\nauthor ");
+		a = find_commit_header(author_message_buffer, "author", &len);
 		if (!a)
-			die(_("invalid commit: %s"), author_message);
+			die(_("commit '%s' lacks author header"), author_message);
+		if (split_ident_line(&ident, a, len) < 0)
+			die(_("commit '%s' has malformed author line"), author_message);
 
-		lb = strchrnul(a + strlen("\nauthor "), '<');
-		rb = strchrnul(lb, '>');
-		eol = strchrnul(rb, '\n');
-		if (!*lb || !*rb || !*eol)
-			die(_("invalid commit: %s"), author_message);
+		set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
+		set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
 
-		if (lb == a + strlen("\nauthor "))
-			/* \nauthor <foo@example.com> */
-			name = xcalloc(1, 1);
-		else
-			name = xmemdupz(a + strlen("\nauthor "),
-					(lb - strlen(" ") -
-					 (a + strlen("\nauthor "))));
-		email = xmemdupz(lb + strlen("<"), rb - (lb + strlen("<")));
-		len = eol - (rb + strlen("> "));
-		date = xmalloc(len + 2);
-		*date = '@';
-		memcpy(date + 1, rb + strlen("> "), len);
-		date[len + 1] = '\0';
+		if (ident.date_begin) {
+			struct strbuf date_buf = STRBUF_INIT;
+			strbuf_addch(&date_buf, '@');
+			strbuf_add(&date_buf, ident.date_begin, ident.date_end - ident.date_begin);
+			strbuf_addch(&date_buf, ' ');
+			strbuf_add(&date_buf, ident.tz_begin, ident.tz_end - ident.tz_begin);
+			set_ident_var(&date, strbuf_detach(&date_buf, NULL));
+		}
 	}
 
 	if (force_author) {
-		const char *lb = strstr(force_author, " <");
-		const char *rb = strchr(force_author, '>');
+		struct ident_split ident;
 
-		if (!lb || !rb)
+		if (split_ident_line(&ident, force_author, strlen(force_author)) < 0)
 			die(_("malformed --author parameter"));
-		name = xstrndup(force_author, lb - force_author);
-		email = xstrndup(lb + 2, rb - (lb + 2));
+		set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
+		set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
 	}
 
 	if (force_date) {
-		if (parse_force_date(force_date, date_buf, sizeof(date_buf)))
+		struct strbuf date_buf = STRBUF_INIT;
+		if (parse_force_date(force_date, &date_buf))
 			die(_("invalid date format: %s"), force_date);
-		date = date_buf;
+		set_ident_var(&date, strbuf_detach(&date_buf, NULL));
 	}
 
 	strbuf_addstr(author_ident, fmt_ident(name, email, date, IDENT_STRICT));
@@ -600,6 +628,10 @@
 		export_one("GIT_AUTHOR_EMAIL", author.mail_begin, author.mail_end, 0);
 		export_one("GIT_AUTHOR_DATE", author.date_begin, author.tz_end, '@');
 	}
+
+	free(name);
+	free(email);
+	free(date);
 }
 
 static void split_ident_or_die(struct ident_split *id, const struct strbuf *buf)
@@ -1048,7 +1080,8 @@
 	revs.mailmap = &mailmap;
 	read_mailmap(revs.mailmap, NULL);
 
-	prepare_revision_walk(&revs);
+	if (prepare_revision_walk(&revs))
+		die(_("revision walk setup failed"));
 	commit = get_revision(&revs);
 	if (commit) {
 		struct pretty_print_context ctx = {0};
@@ -1402,6 +1435,24 @@
 	return 0;
 }
 
+static const char *implicit_ident_advice(void)
+{
+	char *user_config = NULL;
+	char *xdg_config = NULL;
+	int config_exists;
+
+	home_config_paths(&user_config, &xdg_config, "config");
+	config_exists = file_exists(user_config) || file_exists(xdg_config);
+	free(user_config);
+	free(xdg_config);
+
+	if (config_exists)
+		return _(implicit_ident_advice_config);
+	else
+		return _(implicit_ident_advice_noconfig);
+
+}
+
 static void print_summary(const char *prefix, const unsigned char *sha1,
 			  int initial_commit)
 {
@@ -1440,7 +1491,7 @@
 		strbuf_addbuf_percentquote(&format, &committer_ident);
 		if (advice_implicit_identity) {
 			strbuf_addch(&format, '\n');
-			strbuf_addstr(&format, _(implicit_ident_advice));
+			strbuf_addstr(&format, implicit_ident_advice());
 		}
 	}
 	strbuf_release(&author_ident);
@@ -1508,7 +1559,7 @@
 {
 	/* oldsha1 SP newsha1 LF NUL */
 	static char buf[2*40 + 3];
-	struct child_process proc;
+	struct child_process proc = CHILD_PROCESS_INIT;
 	const char *argv[3];
 	int code;
 	size_t n;
@@ -1520,7 +1571,6 @@
 	argv[1] = "amend";
 	argv[2] = NULL;
 
-	memset(&proc, 0, sizeof(proc));
 	proc.argv = argv;
 	proc.in = -1;
 	proc.stdout_to_stderr = 1;
@@ -1620,11 +1670,12 @@
 	const char *index_file, *reflog_msg;
 	char *nl;
 	unsigned char sha1[20];
-	struct ref_lock *ref_lock;
 	struct commit_list *parents = NULL, **pptr = &parents;
 	struct stat statbuf;
 	struct commit *current_head = NULL;
 	struct commit_extra_header *extra = NULL;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage_with_options(builtin_commit_usage, builtin_commit_options);
@@ -1746,16 +1797,6 @@
 	strbuf_release(&author_ident);
 	free_commit_extra_headers(extra);
 
-	ref_lock = lock_any_ref_for_update("HEAD",
-					   !current_head
-					   ? NULL
-					   : current_head->object.sha1,
-					   0, NULL);
-	if (!ref_lock) {
-		rollback_index_files();
-		die(_("cannot lock HEAD ref"));
-	}
-
 	nl = strchr(sb.buf, '\n');
 	if (nl)
 		strbuf_setlen(&sb, nl + 1 - sb.buf);
@@ -1764,10 +1805,17 @@
 	strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
 	strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
 
-	if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) {
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, "HEAD", sha1,
+				   current_head
+				   ? current_head->object.sha1 : NULL,
+				   0, !!current_head, &err) ||
+	    ref_transaction_commit(transaction, sb.buf, &err)) {
 		rollback_index_files();
-		die(_("cannot update HEAD ref"));
+		die("%s", err.buf);
 	}
+	ref_transaction_free(transaction);
 
 	unlink(git_path("CHERRY_PICK_HEAD"));
 	unlink(git_path("REVERT_HEAD"));
@@ -1778,7 +1826,7 @@
 
 	if (commit_index_files())
 		die (_("Repository has been updated, but unable to write\n"
-		     "new_index file. Check that disk is not full or quota is\n"
+		     "new_index file. Check that disk is not full and quota is\n"
 		     "not exceeded, and then \"git reset HEAD\" to recover."));
 
 	rerere(0);
@@ -1796,5 +1844,6 @@
 	if (!quiet)
 		print_summary(prefix, sha1, !current_head);
 
+	strbuf_release(&err);
 	return 0;
 }
diff --git a/builtin/config.c b/builtin/config.c
index fcd8474..aba7135 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -445,6 +445,20 @@
 	return 0;
 }
 
+static char *default_user_config(void)
+{
+	struct strbuf buf = STRBUF_INIT;
+	strbuf_addf(&buf,
+		    _("# This is Git's per-user configuration file.\n"
+		      "[core]\n"
+		      "# Please adapt and uncomment the following lines:\n"
+		      "#	user = %s\n"
+		      "#	email = %s\n"),
+		    ident_default_name(),
+		    ident_default_email());
+	return strbuf_detach(&buf, NULL);
+}
+
 int cmd_config(int argc, const char **argv, const char *prefix)
 {
 	int nongit = !startup_info->have_repository;
@@ -551,6 +565,8 @@
 		}
 	}
 	else if (actions == ACTION_EDIT) {
+		const char *config_file = given_config_source.file ?
+			given_config_source.file : git_path("config");
 		check_argc(argc, 0, 0);
 		if (!given_config_source.file && nongit)
 			die("not in a git directory");
@@ -559,9 +575,18 @@
 		if (given_config_source.blob)
 			die("editing blobs is not supported");
 		git_config(git_default_config, NULL);
-		launch_editor(given_config_source.file ?
-			      given_config_source.file : git_path("config"),
-			      NULL, NULL);
+		if (use_global_config) {
+			int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
+			if (fd) {
+				char *content = default_user_config();
+				write_str_in_full(fd, content);
+				free(content);
+				close(fd);
+			}
+			else if (errno != EEXIST)
+				die_errno(_("cannot create configuration file %s"), config_file);
+		}
+		launch_editor(config_file, NULL, NULL);
 	}
 	else if (actions == ACTION_SET) {
 		int ret;
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 92b4624..b8182c2 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -18,6 +18,7 @@
 #include "parse-options.h"
 #include "quote.h"
 #include "remote.h"
+#include "blob.h"
 
 static const char *fast_export_usage[] = {
 	N_("git fast-export [rev-list-opts]"),
@@ -34,6 +35,7 @@
 static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
 static struct refspec *refspecs;
 static int refspecs_nr;
+static int anonymize;
 
 static int parse_opt_signed_tag_mode(const struct option *opt,
 				     const char *arg, int unset)
@@ -81,6 +83,76 @@
 	return 0;
 }
 
+struct anonymized_entry {
+	struct hashmap_entry hash;
+	const char *orig;
+	size_t orig_len;
+	const char *anon;
+	size_t anon_len;
+};
+
+static int anonymized_entry_cmp(const void *va, const void *vb,
+				const void *data)
+{
+	const struct anonymized_entry *a = va, *b = vb;
+	return a->orig_len != b->orig_len ||
+		memcmp(a->orig, b->orig, a->orig_len);
+}
+
+/*
+ * Basically keep a cache of X->Y so that we can repeatedly replace
+ * the same anonymized string with another. The actual generation
+ * is farmed out to the generate function.
+ */
+static const void *anonymize_mem(struct hashmap *map,
+				 void *(*generate)(const void *, size_t *),
+				 const void *orig, size_t *len)
+{
+	struct anonymized_entry key, *ret;
+
+	if (!map->cmpfn)
+		hashmap_init(map, anonymized_entry_cmp, 0);
+
+	hashmap_entry_init(&key, memhash(orig, *len));
+	key.orig = orig;
+	key.orig_len = *len;
+	ret = hashmap_get(map, &key, NULL);
+
+	if (!ret) {
+		ret = xmalloc(sizeof(*ret));
+		hashmap_entry_init(&ret->hash, key.hash.hash);
+		ret->orig = xstrdup(orig);
+		ret->orig_len = *len;
+		ret->anon = generate(orig, len);
+		ret->anon_len = *len;
+		hashmap_put(map, ret);
+	}
+
+	*len = ret->anon_len;
+	return ret->anon;
+}
+
+/*
+ * We anonymize each component of a path individually,
+ * so that paths a/b and a/c will share a common root.
+ * The paths are cached via anonymize_mem so that repeated
+ * lookups for "a" will yield the same value.
+ */
+static void anonymize_path(struct strbuf *out, const char *path,
+			   struct hashmap *map,
+			   void *(*generate)(const void *, size_t *))
+{
+	while (*path) {
+		const char *end_of_component = strchrnul(path, '/');
+		size_t len = end_of_component - path;
+		const char *c = anonymize_mem(map, generate, path, &len);
+		strbuf_add(out, c, len);
+		path = end_of_component;
+		if (*path)
+			strbuf_addch(out, *path++);
+	}
+}
+
 /* Since intptr_t is C99, we do not use it here */
 static inline uint32_t *mark_to_ptr(uint32_t mark)
 {
@@ -119,6 +191,26 @@
 		printf("progress %d objects\n", counter);
 }
 
+/*
+ * Ideally we would want some transformation of the blob data here
+ * that is unreversible, but would still be the same size and have
+ * the same data relationship to other blobs (so that we get the same
+ * delta and packing behavior as the original). But the first and last
+ * requirements there are probably mutually exclusive, so let's take
+ * the easy way out for now, and just generate arbitrary content.
+ *
+ * There's no need to cache this result with anonymize_mem, since
+ * we already handle blob content caching with marks.
+ */
+static char *anonymize_blob(unsigned long *size)
+{
+	static int counter;
+	struct strbuf out = STRBUF_INIT;
+	strbuf_addf(&out, "anonymous blob %d", counter++);
+	*size = out.len;
+	return strbuf_detach(&out, NULL);
+}
+
 static void export_blob(const unsigned char *sha1)
 {
 	unsigned long size;
@@ -137,12 +229,19 @@
 	if (object && object->flags & SHOWN)
 		return;
 
-	buf = read_sha1_file(sha1, &type, &size);
-	if (!buf)
-		die ("Could not read blob %s", sha1_to_hex(sha1));
-	if (check_sha1_signature(sha1, buf, size, typename(type)) < 0)
-		die("sha1 mismatch in blob %s", sha1_to_hex(sha1));
-	object = parse_object_buffer(sha1, type, size, buf, &eaten);
+	if (anonymize) {
+		buf = anonymize_blob(&size);
+		object = (struct object *)lookup_blob(sha1);
+		eaten = 0;
+	} else {
+		buf = read_sha1_file(sha1, &type, &size);
+		if (!buf)
+			die ("Could not read blob %s", sha1_to_hex(sha1));
+		if (check_sha1_signature(sha1, buf, size, typename(type)) < 0)
+			die("sha1 mismatch in blob %s", sha1_to_hex(sha1));
+		object = parse_object_buffer(sha1, type, size, buf, &eaten);
+	}
+
 	if (!object)
 		die("Could not read blob %s", sha1_to_hex(sha1));
 
@@ -190,7 +289,7 @@
 	return (a->status == 'R') - (b->status == 'R');
 }
 
-static void print_path(const char *path)
+static void print_path_1(const char *path)
 {
 	int need_quote = quote_c_style(path, NULL, NULL, 0);
 	if (need_quote)
@@ -201,6 +300,43 @@
 		printf("%s", path);
 }
 
+static void *anonymize_path_component(const void *path, size_t *len)
+{
+	static int counter;
+	struct strbuf out = STRBUF_INIT;
+	strbuf_addf(&out, "path%d", counter++);
+	return strbuf_detach(&out, len);
+}
+
+static void print_path(const char *path)
+{
+	if (!anonymize)
+		print_path_1(path);
+	else {
+		static struct hashmap paths;
+		static struct strbuf anon = STRBUF_INIT;
+
+		anonymize_path(&anon, path, &paths, anonymize_path_component);
+		print_path_1(anon.buf);
+		strbuf_reset(&anon);
+	}
+}
+
+static void *generate_fake_sha1(const void *old, size_t *len)
+{
+	static uint32_t counter = 1; /* avoid null sha1 */
+	unsigned char *out = xcalloc(20, 1);
+	put_be32(out + 16, counter++);
+	return out;
+}
+
+static const unsigned char *anonymize_sha1(const unsigned char *sha1)
+{
+	static struct hashmap sha1s;
+	size_t len = 20;
+	return anonymize_mem(&sha1s, generate_fake_sha1, sha1, &len);
+}
+
 static void show_filemodify(struct diff_queue_struct *q,
 			    struct diff_options *options, void *data)
 {
@@ -245,7 +381,9 @@
 			 */
 			if (no_data || S_ISGITLINK(spec->mode))
 				printf("M %06o %s ", spec->mode,
-				       sha1_to_hex(spec->sha1));
+				       sha1_to_hex(anonymize ?
+						   anonymize_sha1(spec->sha1) :
+						   spec->sha1));
 			else {
 				struct object *object = lookup_object(spec->sha1);
 				printf("M %06o :%d ", spec->mode,
@@ -279,6 +417,114 @@
 	return bol;
 }
 
+static void *anonymize_ref_component(const void *old, size_t *len)
+{
+	static int counter;
+	struct strbuf out = STRBUF_INIT;
+	strbuf_addf(&out, "ref%d", counter++);
+	return strbuf_detach(&out, len);
+}
+
+static const char *anonymize_refname(const char *refname)
+{
+	/*
+	 * If any of these prefixes is found, we will leave it intact
+	 * so that tags remain tags and so forth.
+	 */
+	static const char *prefixes[] = {
+		"refs/heads/",
+		"refs/tags/",
+		"refs/remotes/",
+		"refs/"
+	};
+	static struct hashmap refs;
+	static struct strbuf anon = STRBUF_INIT;
+	int i;
+
+	/*
+	 * We also leave "master" as a special case, since it does not reveal
+	 * anything interesting.
+	 */
+	if (!strcmp(refname, "refs/heads/master"))
+		return refname;
+
+	strbuf_reset(&anon);
+	for (i = 0; i < ARRAY_SIZE(prefixes); i++) {
+		if (skip_prefix(refname, prefixes[i], &refname)) {
+			strbuf_addstr(&anon, prefixes[i]);
+			break;
+		}
+	}
+
+	anonymize_path(&anon, refname, &refs, anonymize_ref_component);
+	return anon.buf;
+}
+
+/*
+ * We do not even bother to cache commit messages, as they are unlikely
+ * to be repeated verbatim, and it is not that interesting when they are.
+ */
+static char *anonymize_commit_message(const char *old)
+{
+	static int counter;
+	return xstrfmt("subject %d\n\nbody\n", counter++);
+}
+
+static struct hashmap idents;
+static void *anonymize_ident(const void *old, size_t *len)
+{
+	static int counter;
+	struct strbuf out = STRBUF_INIT;
+	strbuf_addf(&out, "User %d <user%d@example.com>", counter, counter);
+	counter++;
+	return strbuf_detach(&out, len);
+}
+
+/*
+ * Our strategy here is to anonymize the names and email addresses,
+ * but keep timestamps intact, as they influence things like traversal
+ * order (and by themselves should not be too revealing).
+ */
+static void anonymize_ident_line(const char **beg, const char **end)
+{
+	static struct strbuf buffers[] = { STRBUF_INIT, STRBUF_INIT };
+	static unsigned which_buffer;
+
+	struct strbuf *out;
+	struct ident_split split;
+	const char *end_of_header;
+
+	out = &buffers[which_buffer++];
+	which_buffer %= ARRAY_SIZE(buffers);
+	strbuf_reset(out);
+
+	/* skip "committer", "author", "tagger", etc */
+	end_of_header = strchr(*beg, ' ');
+	if (!end_of_header)
+		die("BUG: malformed line fed to anonymize_ident_line: %.*s",
+		    (int)(*end - *beg), *beg);
+	end_of_header++;
+	strbuf_add(out, *beg, end_of_header - *beg);
+
+	if (!split_ident_line(&split, end_of_header, *end - end_of_header) &&
+	    split.date_begin) {
+		const char *ident;
+		size_t len;
+
+		len = split.mail_end - split.name_begin;
+		ident = anonymize_mem(&idents, anonymize_ident,
+				      split.name_begin, &len);
+		strbuf_add(out, ident, len);
+		strbuf_addch(out, ' ');
+		strbuf_add(out, split.date_begin, split.tz_end - split.date_begin);
+	} else {
+		strbuf_addstr(out, "Malformed Ident <malformed@example.com> 0 -0000");
+	}
+
+	*beg = out->buf;
+	*end = out->buf + out->len;
+}
+
 static void handle_commit(struct commit *commit, struct rev_info *rev)
 {
 	int saved_output_format = rev->diffopt.output_format;
@@ -287,6 +533,7 @@
 	const char *encoding, *message;
 	char *reencoded = NULL;
 	struct commit_list *p;
+	const char *refname;
 	int i;
 
 	rev->diffopt.output_format = DIFF_FORMAT_CALLBACK;
@@ -326,13 +573,22 @@
 		if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
 			export_blob(diff_queued_diff.queue[i]->two->sha1);
 
+	refname = commit->util;
+	if (anonymize) {
+		refname = anonymize_refname(refname);
+		anonymize_ident_line(&committer, &committer_end);
+		anonymize_ident_line(&author, &author_end);
+	}
+
 	mark_next_object(&commit->object);
-	if (!is_encoding_utf8(encoding))
+	if (anonymize)
+		reencoded = anonymize_commit_message(message);
+	else if (!is_encoding_utf8(encoding))
 		reencoded = reencode_string(message, "UTF-8", encoding);
 	if (!commit->parents)
-		printf("reset %s\n", (const char*)commit->util);
+		printf("reset %s\n", refname);
 	printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
-	       (const char *)commit->util, last_idnum,
+	       refname, last_idnum,
 	       (int)(author_end - author), author,
 	       (int)(committer_end - committer), committer,
 	       (unsigned)(reencoded
@@ -363,6 +619,14 @@
 	show_progress();
 }
 
+static void *anonymize_tag(const void *old, size_t *len)
+{
+	static int counter;
+	struct strbuf out = STRBUF_INIT;
+	strbuf_addf(&out, "tag message %d", counter++);
+	return strbuf_detach(&out, len);
+}
+
 static void handle_tail(struct object_array *commits, struct rev_info *revs)
 {
 	struct commit *commit;
@@ -419,6 +683,17 @@
 	} else {
 		tagger++;
 		tagger_end = strchrnul(tagger, '\n');
+		if (anonymize)
+			anonymize_ident_line(&tagger, &tagger_end);
+	}
+
+	if (anonymize) {
+		name = anonymize_refname(name);
+		if (message) {
+			static struct hashmap tags;
+			message = anonymize_mem(&tags, anonymize_tag,
+						message, &message_size);
+		}
 	}
 
 	/* handle signed tags */
@@ -584,6 +859,8 @@
 			handle_tag(name, (struct tag *)object);
 			break;
 		case OBJ_COMMIT:
+			if (anonymize)
+				name = anonymize_refname(name);
 			/* create refs pointing to already seen commits */
 			commit = (struct commit *)object;
 			printf("reset %s\nfrom :%d\n\n", name,
@@ -719,6 +996,7 @@
 		OPT_BOOL(0, "no-data", &no_data, N_("Skip output of blob data")),
 		OPT_STRING_LIST(0, "refspec", &refspecs_list, N_("refspec"),
 			     N_("Apply refspec to exported refs")),
+		OPT_BOOL(0, "anonymize", &anonymize, N_("anonymize output")),
 		OPT_END()
 	};
 
diff --git a/builtin/fetch.c b/builtin/fetch.c
index e8d0cca..159fb7e 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1110,9 +1110,7 @@
 	struct string_list list = STRING_LIST_INIT_NODUP;
 	struct remote *remote;
 	int result = 0;
-	static const char *argv_gc_auto[] = {
-		"gc", "--auto", NULL,
-	};
+	struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
 
 	packet_trace_identity("fetch");
 
@@ -1198,7 +1196,11 @@
 	list.strdup_strings = 1;
 	string_list_clear(&list, 0);
 
-	run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
+	argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
+	if (verbosity < 0)
+		argv_array_push(&argv_gc_auto, "--quiet");
+	run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
+	argv_array_clear(&argv_gc_auto);
 
 	return result;
 }
diff --git a/builtin/gc.c b/builtin/gc.c
index 8d219d8..ced1456 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -55,44 +55,33 @@
 	raise(signo);
 }
 
-static int gc_config(const char *var, const char *value, void *cb)
+static void gc_config(void)
 {
-	if (!strcmp(var, "gc.packrefs")) {
+	const char *value;
+
+	if (!git_config_get_value("gc.packrefs", &value)) {
 		if (value && !strcmp(value, "notbare"))
 			pack_refs = -1;
 		else
-			pack_refs = git_config_bool(var, value);
-		return 0;
+			pack_refs = git_config_bool("gc.packrefs", value);
 	}
-	if (!strcmp(var, "gc.aggressivewindow")) {
-		aggressive_window = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.aggressivedepth")) {
-		aggressive_depth = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.auto")) {
-		gc_auto_threshold = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.autopacklimit")) {
-		gc_auto_pack_limit = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.autodetach")) {
-		detach_auto = git_config_bool(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "gc.pruneexpire")) {
-		if (value && strcmp(value, "now")) {
+
+	git_config_get_int("gc.aggressivewindow", &aggressive_window);
+	git_config_get_int("gc.aggressivedepth", &aggressive_depth);
+	git_config_get_int("gc.auto", &gc_auto_threshold);
+	git_config_get_int("gc.autopacklimit", &gc_auto_pack_limit);
+	git_config_get_bool("gc.autodetach", &detach_auto);
+
+	if (!git_config_get_string_const("gc.pruneexpire", &prune_expire)) {
+		if (strcmp(prune_expire, "now")) {
 			unsigned long now = approxidate("now");
-			if (approxidate(value) >= now)
-				return error(_("Invalid %s: '%s'"), var, value);
+			if (approxidate(prune_expire) >= now) {
+				git_die_config("gc.pruneexpire", _("Invalid gc.pruneexpire: '%s'"),
+						prune_expire);
+			}
 		}
-		return git_config_string(&prune_expire, var, value);
 	}
-	return git_default_config(var, value, cb);
+	git_config(git_default_config, NULL);
 }
 
 static int too_many_loose_objects(void)
@@ -301,7 +290,7 @@
 	argv_array_pushl(&prune, "prune", "--expire", NULL );
 	argv_array_pushl(&rerere, "rerere", "gc", NULL);
 
-	git_config(gc_config, NULL);
+	gc_config();
 
 	if (pack_refs < 0)
 		pack_refs = !is_bare_repository();
diff --git a/builtin/help.c b/builtin/help.c
index 1fdefeb..8343b40 100644
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -79,12 +79,11 @@
 static int check_emacsclient_version(void)
 {
 	struct strbuf buffer = STRBUF_INIT;
-	struct child_process ec_process;
+	struct child_process ec_process = CHILD_PROCESS_INIT;
 	const char *argv_ec[] = { "emacsclient", "--version", NULL };
 	int version;
 
 	/* emacsclient prints its version number on stderr */
-	memset(&ec_process, 0, sizeof(ec_process));
 	ec_process.argv = argv_ec;
 	ec_process.err = -1;
 	ec_process.stdout_to_stderr = 1;
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 5568a5b..eebf1a8 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -112,6 +112,10 @@
 #define deepest_delta_lock()	lock_mutex(&deepest_delta_mutex)
 #define deepest_delta_unlock()	unlock_mutex(&deepest_delta_mutex)
 
+static pthread_mutex_t type_cas_mutex;
+#define type_cas_lock()		lock_mutex(&type_cas_mutex)
+#define type_cas_unlock()	unlock_mutex(&type_cas_mutex)
+
 static pthread_key_t key;
 
 static inline void lock_mutex(pthread_mutex_t *mutex)
@@ -135,6 +139,7 @@
 	init_recursive_mutex(&read_mutex);
 	pthread_mutex_init(&counter_mutex, NULL);
 	pthread_mutex_init(&work_mutex, NULL);
+	pthread_mutex_init(&type_cas_mutex, NULL);
 	if (show_stat)
 		pthread_mutex_init(&deepest_delta_mutex, NULL);
 	pthread_key_create(&key, NULL);
@@ -157,6 +162,7 @@
 	pthread_mutex_destroy(&read_mutex);
 	pthread_mutex_destroy(&counter_mutex);
 	pthread_mutex_destroy(&work_mutex);
+	pthread_mutex_destroy(&type_cas_mutex);
 	if (show_stat)
 		pthread_mutex_destroy(&deepest_delta_mutex);
 	for (i = 0; i < nr_threads; i++)
@@ -862,7 +868,6 @@
 {
 	void *base_data, *delta_data;
 
-	delta_obj->real_type = base->obj->real_type;
 	if (show_stat) {
 		delta_obj->delta_depth = base->obj->delta_depth + 1;
 		deepest_delta_lock();
@@ -888,6 +893,26 @@
 	counter_unlock();
 }
 
+/*
+ * Standard boolean compare-and-swap: atomically check whether "*type" is
+ * "want"; if so, swap in "set" and return true. Otherwise, leave it untouched
+ * and return false.
+ */
+static int compare_and_swap_type(enum object_type *type,
+				 enum object_type want,
+				 enum object_type set)
+{
+	enum object_type old;
+
+	type_cas_lock();
+	old = *type;
+	if (old == want)
+		*type = set;
+	type_cas_unlock();
+
+	return old == want;
+}
+
 static struct base_data *find_unresolved_deltas_1(struct base_data *base,
 						  struct base_data *prev_base)
 {
@@ -915,7 +940,10 @@
 		struct object_entry *child = objects + deltas[base->ref_first].obj_no;
 		struct base_data *result = alloc_base_data();
 
-		assert(child->real_type == OBJ_REF_DELTA);
+		if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
+					   base->obj->real_type))
+			die("BUG: child->real_type != OBJ_REF_DELTA");
+
 		resolve_delta(child, base, result);
 		if (base->ref_first == base->ref_last && base->ofs_last == -1)
 			free_base_data(base);
@@ -929,6 +957,7 @@
 		struct base_data *result = alloc_base_data();
 
 		assert(child->real_type == OBJ_OFS_DELTA);
+		child->real_type = base->obj->real_type;
 		resolve_delta(child, base, result);
 		if (base->ofs_first == base->ofs_last)
 			free_base_data(base);
diff --git a/builtin/init-db.c b/builtin/init-db.c
index 56f85e2..587a505 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -330,12 +330,12 @@
 		 * moving the target repo later on in separate_git_dir()
 		 */
 		git_link = xstrdup(real_path(git_dir));
+		set_git_dir(real_path(real_git_dir));
 	}
 	else {
-		real_git_dir = real_path(git_dir);
+		set_git_dir(real_path(git_dir));
 		git_link = NULL;
 	}
-	set_git_dir(real_path(real_git_dir));
 	return 0;
 }
 
@@ -426,8 +426,9 @@
 
 static int guess_repository_type(const char *git_dir)
 {
-	char cwd[PATH_MAX];
 	const char *slash;
+	char *cwd;
+	int cwd_is_git_dir;
 
 	/*
 	 * "GIT_DIR=. git init" is always bare.
@@ -435,9 +436,10 @@
 	 */
 	if (!strcmp(".", git_dir))
 		return 1;
-	if (!getcwd(cwd, sizeof(cwd)))
-		die_errno(_("cannot tell cwd"));
-	if (!strcmp(git_dir, cwd))
+	cwd = xgetcwd();
+	cwd_is_git_dir = !strcmp(git_dir, cwd);
+	free(cwd);
+	if (cwd_is_git_dir)
 		return 1;
 	/*
 	 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
@@ -535,10 +537,9 @@
 		usage(init_db_usage[0]);
 	}
 	if (is_bare_repository_cfg == 1) {
-		static char git_dir[PATH_MAX+1];
-
-		setenv(GIT_DIR_ENVIRONMENT,
-			getcwd(git_dir, sizeof(git_dir)), argc > 0);
+		char *cwd = xgetcwd();
+		setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
+		free(cwd);
 	}
 
 	if (init_shared_repository != -1)
@@ -572,13 +573,10 @@
 			git_work_tree_cfg = xstrdup(real_path(rel));
 			free(rel);
 		}
-		if (!git_work_tree_cfg) {
-			git_work_tree_cfg = xcalloc(PATH_MAX, 1);
-			if (!getcwd(git_work_tree_cfg, PATH_MAX))
-				die_errno (_("Cannot access current working directory"));
-		}
+		if (!git_work_tree_cfg)
+			git_work_tree_cfg = xgetcwd();
 		if (work_tree)
-			set_git_work_tree(real_path(work_tree));
+			set_git_work_tree(work_tree);
 		else
 			set_git_work_tree(git_work_tree_cfg);
 		if (access(get_git_work_tree(), X_OK))
@@ -587,7 +585,7 @@
 	}
 	else {
 		if (work_tree)
-			set_git_work_tree(real_path(work_tree));
+			set_git_work_tree(work_tree);
 	}
 
 	set_git_dir_init(git_dir, real_git_dir, 1);
diff --git a/builtin/log.c b/builtin/log.c
index 4389722..e4d8122 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -864,6 +864,7 @@
 		strbuf_addbuf(buf, &desc);
 		strbuf_addch(buf, '\n');
 	}
+	strbuf_release(&desc);
 }
 
 static char *find_branch_name(struct rev_info *rev)
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 47c3880..99cee20 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -474,7 +474,7 @@
 		OPT_BOOL('k', "killed", &show_killed,
 			N_("show files on the filesystem that need to be removed")),
 		OPT_BIT(0, "directory", &dir.flags,
-			N_("show 'other' directories' name only"),
+			N_("show 'other' directories' names only"),
 			DIR_SHOW_OTHER_DIRECTORIES),
 		OPT_NEGBIT(0, "empty-directory", &dir.flags,
 			N_("don't show empty directories"),
diff --git a/builtin/mailsplit.c b/builtin/mailsplit.c
index 06296d4..763cda0 100644
--- a/builtin/mailsplit.c
+++ b/builtin/mailsplit.c
@@ -53,14 +53,16 @@
  */
 static int split_one(FILE *mbox, const char *name, int allow_bare)
 {
-	FILE *output = NULL;
+	FILE *output;
 	int fd;
 	int status = 0;
 	int is_bare = !is_from_line(buf.buf, buf.len);
 
-	if (is_bare && !allow_bare)
-		goto corrupt;
-
+	if (is_bare && !allow_bare) {
+		unlink(name);
+		fprintf(stderr, "corrupt mailbox\n");
+		exit(1);
+	}
 	fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
 	if (fd < 0)
 		die_errno("cannot open output file '%s'", name);
@@ -91,13 +93,6 @@
 	}
 	fclose(output);
 	return status;
-
- corrupt:
-	if (output)
-		fclose(output);
-	unlink(name);
-	fprintf(stderr, "corrupt mailbox\n");
-	exit(1);
 }
 
 static int populate_maildir_list(struct string_list *list, const char *path)
diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index 61cbde4..f9ab485 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -25,7 +25,7 @@
 	merge_result_end = &entry->next;
 }
 
-static void merge_trees_recursive(struct tree_desc t[3], const char *base, int df_conflict);
+static void merge_trees(struct tree_desc t[3], const char *base);
 
 static const char *explanation(struct merge_list *entry)
 {
@@ -195,8 +195,8 @@
 	add_merge_entry(final);
 }
 
-static void unresolved_directory(const struct traverse_info *info, struct name_entry n[3],
-				 int df_conflict)
+static void unresolved_directory(const struct traverse_info *info,
+				 struct name_entry n[3])
 {
 	char *newbase;
 	struct name_entry *p;
@@ -218,7 +218,7 @@
 	buf2 = fill_tree_descriptor(t+2, ENTRY_SHA1(n + 2));
 #undef ENTRY_SHA1
 
-	merge_trees_recursive(t, newbase, df_conflict);
+	merge_trees(t, newbase);
 
 	free(buf0);
 	free(buf1);
@@ -259,7 +259,7 @@
 			dirmask |= (1 << i);
 	}
 
-	unresolved_directory(info, n, dirmask && (dirmask != mask));
+	unresolved_directory(info, n);
 
 	if (dirmask == mask)
 		return;
@@ -335,21 +335,15 @@
 	return mask;
 }
 
-static void merge_trees_recursive(struct tree_desc t[3], const char *base, int df_conflict)
+static void merge_trees(struct tree_desc t[3], const char *base)
 {
 	struct traverse_info info;
 
 	setup_traverse_info(&info, base);
-	info.data = &df_conflict;
 	info.fn = threeway_callback;
 	traverse_trees(3, t, &info);
 }
 
-static void merge_trees(struct tree_desc t[3], const char *base)
-{
-	merge_trees_recursive(t, base, 0);
-}
-
 static void *get_tree_descriptor(struct tree_desc *desc, const char *rev)
 {
 	unsigned char sha1[20];
diff --git a/builtin/merge.c b/builtin/merge.c
index ce82eb2..ec6fa93 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -237,11 +237,10 @@
 static int save_state(unsigned char *stash)
 {
 	int len;
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	struct strbuf buffer = STRBUF_INIT;
 	const char *argv[] = {"stash", "create", NULL};
 
-	memset(&cp, 0, sizeof(cp));
 	cp.argv = argv;
 	cp.out = -1;
 	cp.git_cmd = 1;
@@ -1144,14 +1143,14 @@
 		 */
 		if (advice_resolve_conflict)
 			die(_("You have not concluded your merge (MERGE_HEAD exists).\n"
-				  "Please, commit your changes before you can merge."));
+				  "Please, commit your changes before you merge."));
 		else
 			die(_("You have not concluded your merge (MERGE_HEAD exists)."));
 	}
 	if (file_exists(git_path("CHERRY_PICK_HEAD"))) {
 		if (advice_resolve_conflict)
 			die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
-			    "Please, commit your changes before you can merge."));
+			    "Please, commit your changes before you merge."));
 		else
 			die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists)."));
 	}
diff --git a/builtin/mv.c b/builtin/mv.c
index 6ffe540..bf784cb 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -61,6 +61,46 @@
 static struct lock_file lock_file;
 #define SUBMODULE_WITH_GITDIR ((const char *)1)
 
+static void prepare_move_submodule(const char *src, int first,
+				   const char **submodule_gitfile)
+{
+	struct strbuf submodule_dotgit = STRBUF_INIT;
+	if (!S_ISGITLINK(active_cache[first]->ce_mode))
+		die(_("Directory %s is in index and no submodule?"), src);
+	if (!is_staging_gitmodules_ok())
+		die(_("Please stage your changes to .gitmodules or stash them to proceed"));
+	strbuf_addf(&submodule_dotgit, "%s/.git", src);
+	*submodule_gitfile = read_gitfile(submodule_dotgit.buf);
+	if (*submodule_gitfile)
+		*submodule_gitfile = xstrdup(*submodule_gitfile);
+	else
+		*submodule_gitfile = SUBMODULE_WITH_GITDIR;
+	strbuf_release(&submodule_dotgit);
+}
+
+static int index_range_of_same_dir(const char *src, int length,
+				   int *first_p, int *last_p)
+{
+	const char *src_w_slash = add_slash(src);
+	int first, last, len_w_slash = length + 1;
+
+	first = cache_name_pos(src_w_slash, len_w_slash);
+	if (first >= 0)
+		die(_("%.*s is in index"), len_w_slash, src_w_slash);
+
+	first = -1 - first;
+	for (last = first; last < active_nr; last++) {
+		const char *path = active_cache[last]->name;
+		if (strncmp(path, src_w_slash, len_w_slash))
+			break;
+	}
+	if (src_w_slash != src)
+		free((char *)src_w_slash);
+	*first_p = first;
+	*last_p = last;
+	return last - first;
+}
+
 int cmd_mv(int argc, const char **argv, const char *prefix)
 {
 	int i, gitmodules_modified = 0;
@@ -108,7 +148,7 @@
 		destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 	} else {
 		if (argc != 1)
-			die("destination '%s' is not a directory", dest_path[0]);
+			die(_("destination '%s' is not a directory"), dest_path[0]);
 		destination = dest_path;
 	}
 
@@ -131,75 +171,36 @@
 				&& lstat(dst, &st) == 0)
 			bad = _("cannot move directory over file");
 		else if (src_is_dir) {
-			int first = cache_name_pos(src, length);
-			if (first >= 0) {
-				struct strbuf submodule_dotgit = STRBUF_INIT;
-				if (!S_ISGITLINK(active_cache[first]->ce_mode))
-					die (_("Huh? Directory %s is in index and no submodule?"), src);
-				if (!is_staging_gitmodules_ok())
-					die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
-				strbuf_addf(&submodule_dotgit, "%s/.git", src);
-				submodule_gitfile[i] = read_gitfile(submodule_dotgit.buf);
-				if (submodule_gitfile[i])
-					submodule_gitfile[i] = xstrdup(submodule_gitfile[i]);
-				else
-					submodule_gitfile[i] = SUBMODULE_WITH_GITDIR;
-				strbuf_release(&submodule_dotgit);
-			} else {
-				const char *src_w_slash = add_slash(src);
-				int last, len_w_slash = length + 1;
+			int first = cache_name_pos(src, length), last;
+
+			if (first >= 0)
+				prepare_move_submodule(src, first,
+						       submodule_gitfile + i);
+			else if (index_range_of_same_dir(src, length,
+							 &first, &last) < 1)
+				bad = _("source directory is empty");
+			else { /* last - first >= 1 */
+				int j, dst_len, n;
 
 				modes[i] = WORKING_DIRECTORY;
+				n = argc + last - first;
+				source = xrealloc(source, n * sizeof(char *));
+				destination = xrealloc(destination, n * sizeof(char *));
+				modes = xrealloc(modes, n * sizeof(enum update_mode));
+				submodule_gitfile = xrealloc(submodule_gitfile, n * sizeof(char *));
 
-				first = cache_name_pos(src_w_slash, len_w_slash);
-				if (first >= 0)
-					die (_("Huh? %.*s is in index?"),
-							len_w_slash, src_w_slash);
+				dst = add_slash(dst);
+				dst_len = strlen(dst);
 
-				first = -1 - first;
-				for (last = first; last < active_nr; last++) {
-					const char *path = active_cache[last]->name;
-					if (strncmp(path, src_w_slash, len_w_slash))
-						break;
+				for (j = 0; j < last - first; j++) {
+					const char *path = active_cache[first + j]->name;
+					source[argc + j] = path;
+					destination[argc + j] =
+						prefix_path(dst, dst_len, path + length + 1);
+					modes[argc + j] = INDEX;
+					submodule_gitfile[argc + j] = NULL;
 				}
-				if (src_w_slash != src)
-					free((char *)src_w_slash);
-
-				if (last - first < 1)
-					bad = _("source directory is empty");
-				else {
-					int j, dst_len;
-
-					if (last - first > 0) {
-						source = xrealloc(source,
-								(argc + last - first)
-								* sizeof(char *));
-						destination = xrealloc(destination,
-								(argc + last - first)
-								* sizeof(char *));
-						modes = xrealloc(modes,
-								(argc + last - first)
-								* sizeof(enum update_mode));
-						submodule_gitfile = xrealloc(submodule_gitfile,
-								(argc + last - first)
-								* sizeof(char *));
-					}
-
-					dst = add_slash(dst);
-					dst_len = strlen(dst);
-
-					for (j = 0; j < last - first; j++) {
-						const char *path =
-							active_cache[first + j]->name;
-						source[argc + j] = path;
-						destination[argc + j] =
-							prefix_path(dst, dst_len,
-								path + length + 1);
-						modes[argc + j] = INDEX;
-						submodule_gitfile[argc + j] = NULL;
-					}
-					argc += last - first;
-				}
+				argc += last - first;
 			}
 		} else if (cache_name_pos(src, length) < 0)
 			bad = _("not under version control");
@@ -225,24 +226,22 @@
 		else
 			string_list_insert(&src_for_dst, dst);
 
-		if (bad) {
-			if (ignore_errors) {
-				if (--argc > 0) {
-					memmove(source + i, source + i + 1,
-						(argc - i) * sizeof(char *));
-					memmove(destination + i,
-						destination + i + 1,
-						(argc - i) * sizeof(char *));
-					memmove(modes + i, modes + i + 1,
-						(argc - i) * sizeof(enum update_mode));
-					memmove(submodule_gitfile + i,
-						submodule_gitfile + i + 1,
-						(argc - i) * sizeof(char *));
-					i--;
-				}
-			} else
-				die (_("%s, source=%s, destination=%s"),
-				     bad, src, dst);
+		if (!bad)
+			continue;
+		if (!ignore_errors)
+			die(_("%s, source=%s, destination=%s"),
+			     bad, src, dst);
+		if (--argc > 0) {
+			int n = argc - i;
+			memmove(source + i, source + i + 1,
+				n * sizeof(char *));
+			memmove(destination + i, destination + i + 1,
+				n * sizeof(char *));
+			memmove(modes + i, modes + i + 1,
+				n * sizeof(enum update_mode));
+			memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
+				n * sizeof(char *));
+			i--;
 		}
 	}
 
@@ -254,7 +253,7 @@
 			printf(_("Renaming %s to %s\n"), src, dst);
 		if (!show_only && mode != INDEX) {
 			if (rename(src, dst) < 0 && !ignore_errors)
-				die_errno (_("renaming '%s' failed"), src);
+				die_errno(_("renaming '%s' failed"), src);
 			if (submodule_gitfile[i]) {
 				if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 					connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
@@ -275,10 +274,9 @@
 	if (gitmodules_modified)
 		stage_updated_gitmodules();
 
-	if (active_cache_changed) {
-		if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
-			die(_("Unable to write new index file"));
-	}
+	if (active_cache_changed &&
+	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+		die(_("Unable to write new index file"));
 
 	return 0;
 }
diff --git a/builtin/notes.c b/builtin/notes.c
index 820c341..67d0bb1 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -122,12 +122,11 @@
 {
 	const char *show_args[5] =
 		{"show", "--stat", "--no-notes", sha1_to_hex(object), NULL};
-	struct child_process show;
+	struct child_process show = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
 	struct strbuf cbuf = STRBUF_INIT;
 
 	/* Invoke "git show --stat --no-notes $object" */
-	memset(&show, 0, sizeof(show));
 	show.argv = show_args;
 	show.no_stdin = 1;
 	show.out = -1;
@@ -211,7 +210,7 @@
 		if (write_sha1_file(msg->buf.buf, msg->buf.len, blob_type, result)) {
 			error(_("unable to write note object"));
 			if (path)
-				error(_("The note contents has been left in %s"),
+				error(_("The note contents have been left in %s"),
 				      path);
 			exit(128);
 		}
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index f93ac45..afb8d99 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -255,7 +255,7 @@
 typedef int (*feed_fn)(void *, const char **, size_t *);
 static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_state)
 {
-	struct child_process proc;
+	struct child_process proc = CHILD_PROCESS_INIT;
 	struct async muxer;
 	const char *argv[2];
 	int code;
@@ -266,7 +266,6 @@
 
 	argv[1] = NULL;
 
-	memset(&proc, 0, sizeof(proc));
 	proc.argv = argv;
 	proc.in = -1;
 	proc.stdout_to_stderr = 1;
@@ -350,7 +349,7 @@
 static int run_update_hook(struct command *cmd)
 {
 	const char *argv[5];
-	struct child_process proc;
+	struct child_process proc = CHILD_PROCESS_INIT;
 	int code;
 
 	argv[0] = find_hook("update");
@@ -362,7 +361,6 @@
 	argv[3] = sha1_to_hex(cmd->new_sha1);
 	argv[4] = NULL;
 
-	memset(&proc, 0, sizeof(proc));
 	proc.no_stdin = 1;
 	proc.stdout_to_stderr = 1;
 	proc.err = use_sideband ? -1 : 0;
@@ -475,7 +473,6 @@
 	const char *namespaced_name;
 	unsigned char *old_sha1 = cmd->old_sha1;
 	unsigned char *new_sha1 = cmd->new_sha1;
-	struct ref_lock *lock;
 
 	/* only refs/... are allowed */
 	if (!starts_with(name, "refs/") || check_refname_format(name + 5, 0)) {
@@ -576,19 +573,27 @@
 		return NULL; /* good */
 	}
 	else {
+		struct strbuf err = STRBUF_INIT;
+		struct ref_transaction *transaction;
+
 		if (shallow_update && si->shallow_ref[cmd->index] &&
 		    update_shallow_ref(cmd, si))
 			return "shallow error";
 
-		lock = lock_any_ref_for_update(namespaced_name, old_sha1,
-					       0, NULL);
-		if (!lock) {
-			rp_error("failed to lock %s", name);
-			return "failed to lock";
+		transaction = ref_transaction_begin(&err);
+		if (!transaction ||
+		    ref_transaction_update(transaction, namespaced_name,
+					   new_sha1, old_sha1, 0, 1, &err) ||
+		    ref_transaction_commit(transaction, "push", &err)) {
+			ref_transaction_free(transaction);
+
+			rp_error("%s", err.buf);
+			strbuf_release(&err);
+			return "failed to update ref";
 		}
-		if (write_ref_sha1(lock, new_sha1, "push")) {
-			return "failed to write"; /* error() already called */
-		}
+
+		ref_transaction_free(transaction);
+		strbuf_release(&err);
 		return NULL; /* good */
 	}
 }
@@ -598,7 +603,7 @@
 	struct command *cmd;
 	int argc;
 	const char **argv;
-	struct child_process proc;
+	struct child_process proc = CHILD_PROCESS_INIT;
 	char *hook;
 
 	hook = find_hook("post-update");
@@ -621,7 +626,6 @@
 	}
 	argv[argc] = NULL;
 
-	memset(&proc, 0, sizeof(proc));
 	proc.no_stdin = 1;
 	proc.stdout_to_stderr = 1;
 	proc.err = use_sideband ? -1 : 0;
@@ -911,7 +915,7 @@
 	const char *hdr_err;
 	int status;
 	char hdr_arg[38];
-	struct child_process child;
+	struct child_process child = CHILD_PROCESS_INIT;
 	int fsck_objects = (receive_fsck_objects >= 0
 			    ? receive_fsck_objects
 			    : transfer_fsck_objects >= 0
@@ -933,7 +937,6 @@
 		argv_array_pushl(&av, "--shallow-file", alt_shallow_file, NULL);
 	}
 
-	memset(&child, 0, sizeof(child));
 	if (ntohl(hdr.hdr_entries) < unpack_limit) {
 		argv_array_pushl(&av, "unpack-objects", hdr_arg, NULL);
 		if (quiet)
diff --git a/builtin/remote-ext.c b/builtin/remote-ext.c
index 692c834..d699d28 100644
--- a/builtin/remote-ext.c
+++ b/builtin/remote-ext.c
@@ -179,9 +179,8 @@
 static int run_child(const char *arg, const char *service)
 {
 	int r;
-	struct child_process child;
+	struct child_process child = CHILD_PROCESS_INIT;
 
-	memset(&child, 0, sizeof(child));
 	child.in = -1;
 	child.out = -1;
 	child.err = 0;
diff --git a/builtin/repack.c b/builtin/repack.c
index a77e743..fc088db 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -133,7 +133,7 @@
 		{".idx"},
 		{".bitmap", 1},
 	};
-	struct child_process cmd;
+	struct child_process cmd = CHILD_PROCESS_INIT;
 	struct string_list_item *item;
 	struct argv_array cmd_args = ARGV_ARRAY_INIT;
 	struct string_list names = STRING_LIST_INIT_DUP;
@@ -250,7 +250,6 @@
 
 	argv_array_push(&cmd_args, packtmp);
 
-	memset(&cmd, 0, sizeof(cmd));
 	cmd.argv = cmd_args.argv;
 	cmd.git_cmd = 1;
 	cmd.out = -1;
diff --git a/builtin/replace.c b/builtin/replace.c
index 294b61b..8020db8 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -155,7 +155,8 @@
 	unsigned char prev[20];
 	enum object_type obj_type, repl_type;
 	char ref[PATH_MAX];
-	struct ref_lock *lock;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
 	obj_type = sha1_object_info(object, NULL);
 	repl_type = sha1_object_info(repl, NULL);
@@ -168,12 +169,13 @@
 
 	check_ref_valid(object, prev, ref, sizeof(ref), force);
 
-	lock = lock_any_ref_for_update(ref, prev, 0, NULL);
-	if (!lock)
-		die("%s: cannot lock the ref", ref);
-	if (write_ref_sha1(lock, repl, NULL) < 0)
-		die("%s: cannot update the ref", ref);
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, ref, repl, prev, 0, 1, &err) ||
+	    ref_transaction_commit(transaction, NULL, &err))
+		die("%s", err.buf);
 
+	ref_transaction_free(transaction);
 	return 0;
 }
 
@@ -197,7 +199,7 @@
 static void export_object(const unsigned char *sha1, enum object_type type,
 			  int raw, const char *filename)
 {
-	struct child_process cmd = { NULL };
+	struct child_process cmd = CHILD_PROCESS_INIT;
 	int fd;
 
 	fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
@@ -234,7 +236,7 @@
 
 	if (!raw && type == OBJ_TREE) {
 		const char *argv[] = { "mktree", NULL };
-		struct child_process cmd = { argv };
+		struct child_process cmd = CHILD_PROCESS_INIT;
 		struct strbuf result = STRBUF_INIT;
 
 		cmd.argv = argv;
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index d85e08c..c911b45 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -736,7 +736,7 @@
 			}
 			if (!strcmp(arg, "--git-dir")) {
 				const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
-				static char cwd[PATH_MAX];
+				char *cwd;
 				int len;
 				if (gitdir) {
 					puts(gitdir);
@@ -746,10 +746,10 @@
 					puts(".git");
 					continue;
 				}
-				if (!getcwd(cwd, PATH_MAX))
-					die_errno("unable to get current working directory");
+				cwd = xgetcwd();
 				len = strlen(cwd);
 				printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
+				free(cwd);
 				continue;
 			}
 			if (!strcmp(arg, "--resolve-git-dir")) {
diff --git a/builtin/rm.c b/builtin/rm.c
index bc6490b..2b61d3b 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -65,7 +65,7 @@
 			  Q_("the following submodule (or one of its nested "
 			     "submodules)\n"
 			     "uses a .git directory:",
-			     "the following submodules (or one of its nested "
+			     "the following submodules (or one of their nested "
 			     "submodules)\n"
 			     "use a .git directory:", files->nr),
 			  _("\n(use 'rm -rf' if you really want to remove "
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index f420b74..4b1bc0f 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -110,6 +110,7 @@
 	int flags;
 	unsigned int reject_reasons;
 	int progress = -1;
+	int from_stdin = 0;
 	struct push_cas_option cas = {0};
 
 	argv++;
@@ -169,6 +170,10 @@
 				args.stateless_rpc = 1;
 				continue;
 			}
+			if (!strcmp(arg, "--stdin")) {
+				from_stdin = 1;
+				continue;
+			}
 			if (!strcmp(arg, "--helper-status")) {
 				helper_status = 1;
 				continue;
@@ -201,6 +206,28 @@
 	}
 	if (!dest)
 		usage(send_pack_usage);
+
+	if (from_stdin) {
+		struct argv_array all_refspecs = ARGV_ARRAY_INIT;
+
+		for (i = 0; i < nr_refspecs; i++)
+			argv_array_push(&all_refspecs, refspecs[i]);
+
+		if (args.stateless_rpc) {
+			const char *buf;
+			while ((buf = packet_read_line(0, NULL)))
+				argv_array_push(&all_refspecs, buf);
+		} else {
+			struct strbuf line = STRBUF_INIT;
+			while (strbuf_getline(&line, stdin, '\n') != EOF)
+				argv_array_push(&all_refspecs, line.buf);
+			strbuf_release(&line);
+		}
+
+		refspecs = all_refspecs.argv;
+		nr_refspecs = all_refspecs.argc;
+	}
+
 	/*
 	 * --all and --mirror are incompatible; neither makes sense
 	 * with any refspecs.
diff --git a/builtin/tag.c b/builtin/tag.c
index 19eb747..a81b9e4 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -576,7 +576,6 @@
 	struct strbuf ref = STRBUF_INIT;
 	unsigned char object[20], prev[20];
 	const char *object_ref, *tag;
-	struct ref_lock *lock;
 	struct create_tag_options opt;
 	char *cleanup_arg = NULL;
 	int annotate = 0, force = 0, lines = -1;
@@ -584,6 +583,8 @@
 	const char *msgfile = NULL, *keyid = NULL;
 	struct msg_arg msg = { 0, STRBUF_INIT };
 	struct commit_list *with_commit = NULL;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 	struct option options[] = {
 		OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 		{ OPTION_INTEGER, 'n', NULL, &lines, N_("n"),
@@ -729,14 +730,17 @@
 	if (annotate)
 		create_tag(object, tag, &buf, &opt, prev, object);
 
-	lock = lock_any_ref_for_update(ref.buf, prev, 0, NULL);
-	if (!lock)
-		die(_("%s: cannot lock the ref"), ref.buf);
-	if (write_ref_sha1(lock, object, NULL) < 0)
-		die(_("%s: cannot update the ref"), ref.buf);
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, ref.buf, object, prev,
+				   0, 1, &err) ||
+	    ref_transaction_commit(transaction, NULL, &err))
+		die("%s", err.buf);
+	ref_transaction_free(transaction);
 	if (force && !is_null_sha1(prev) && hashcmp(prev, object))
 		printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
 
+	strbuf_release(&err);
 	strbuf_release(&buf);
 	strbuf_release(&ref);
 	return 0;
diff --git a/builtin/update-ref.c b/builtin/update-ref.c
index 3067b11..54a48c0 100644
--- a/builtin/update-ref.c
+++ b/builtin/update-ref.c
@@ -12,11 +12,8 @@
 	NULL
 };
 
-static struct ref_transaction *transaction;
-
 static char line_termination = '\n';
 static int update_flags;
-static struct strbuf err = STRBUF_INIT;
 
 /*
  * Parse one whitespace- or NUL-terminated, possibly C-quoted argument
@@ -177,8 +174,10 @@
  * depending on how line_termination is set.
  */
 
-static const char *parse_cmd_update(struct strbuf *input, const char *next)
+static const char *parse_cmd_update(struct ref_transaction *transaction,
+				    struct strbuf *input, const char *next)
 {
+	struct strbuf err = STRBUF_INIT;
 	char *refname;
 	unsigned char new_sha1[20];
 	unsigned char old_sha1[20];
@@ -204,12 +203,15 @@
 
 	update_flags = 0;
 	free(refname);
+	strbuf_release(&err);
 
 	return next;
 }
 
-static const char *parse_cmd_create(struct strbuf *input, const char *next)
+static const char *parse_cmd_create(struct ref_transaction *transaction,
+				    struct strbuf *input, const char *next)
 {
+	struct strbuf err = STRBUF_INIT;
 	char *refname;
 	unsigned char new_sha1[20];
 
@@ -226,16 +228,21 @@
 	if (*next != line_termination)
 		die("create %s: extra input: %s", refname, next);
 
-	ref_transaction_create(transaction, refname, new_sha1, update_flags);
+	if (ref_transaction_create(transaction, refname, new_sha1,
+				   update_flags, &err))
+		die("%s", err.buf);
 
 	update_flags = 0;
 	free(refname);
+	strbuf_release(&err);
 
 	return next;
 }
 
-static const char *parse_cmd_delete(struct strbuf *input, const char *next)
+static const char *parse_cmd_delete(struct ref_transaction *transaction,
+				    struct strbuf *input, const char *next)
 {
+	struct strbuf err = STRBUF_INIT;
 	char *refname;
 	unsigned char old_sha1[20];
 	int have_old;
@@ -256,17 +263,21 @@
 	if (*next != line_termination)
 		die("delete %s: extra input: %s", refname, next);
 
-	ref_transaction_delete(transaction, refname, old_sha1,
-			       update_flags, have_old);
+	if (ref_transaction_delete(transaction, refname, old_sha1,
+				   update_flags, have_old, &err))
+		die("%s", err.buf);
 
 	update_flags = 0;
 	free(refname);
+	strbuf_release(&err);
 
 	return next;
 }
 
-static const char *parse_cmd_verify(struct strbuf *input, const char *next)
+static const char *parse_cmd_verify(struct ref_transaction *transaction,
+				    struct strbuf *input, const char *next)
 {
+	struct strbuf err = STRBUF_INIT;
 	char *refname;
 	unsigned char new_sha1[20];
 	unsigned char old_sha1[20];
@@ -294,6 +305,7 @@
 
 	update_flags = 0;
 	free(refname);
+	strbuf_release(&err);
 
 	return next;
 }
@@ -307,7 +319,7 @@
 	return next + 8;
 }
 
-static void update_refs_stdin(void)
+static void update_refs_stdin(struct ref_transaction *transaction)
 {
 	struct strbuf input = STRBUF_INIT;
 	const char *next;
@@ -322,13 +334,13 @@
 		else if (isspace(*next))
 			die("whitespace before command: %s", next);
 		else if (starts_with(next, "update "))
-			next = parse_cmd_update(&input, next + 7);
+			next = parse_cmd_update(transaction, &input, next + 7);
 		else if (starts_with(next, "create "))
-			next = parse_cmd_create(&input, next + 7);
+			next = parse_cmd_create(transaction, &input, next + 7);
 		else if (starts_with(next, "delete "))
-			next = parse_cmd_delete(&input, next + 7);
+			next = parse_cmd_delete(transaction, &input, next + 7);
 		else if (starts_with(next, "verify "))
-			next = parse_cmd_verify(&input, next + 7);
+			next = parse_cmd_verify(transaction, &input, next + 7);
 		else if (starts_with(next, "option "))
 			next = parse_cmd_option(&input, next + 7);
 		else
@@ -362,15 +374,21 @@
 		die("Refusing to perform update with empty message.");
 
 	if (read_stdin) {
-		transaction = ref_transaction_begin();
+		struct strbuf err = STRBUF_INIT;
+		struct ref_transaction *transaction;
+
+		transaction = ref_transaction_begin(&err);
+		if (!transaction)
+			die("%s", err.buf);
 		if (delete || no_deref || argc > 0)
 			usage_with_options(git_update_ref_usage, options);
 		if (end_null)
 			line_termination = '\0';
-		update_refs_stdin();
+		update_refs_stdin(transaction);
 		if (ref_transaction_commit(transaction, msg, &err))
 			die("%s", err.buf);
 		ref_transaction_free(transaction);
+		strbuf_release(&err);
 		return 0;
 	}
 
diff --git a/builtin/verify-pack.c b/builtin/verify-pack.c
index 972579f..7747537 100644
--- a/builtin/verify-pack.c
+++ b/builtin/verify-pack.c
@@ -8,7 +8,7 @@
 
 static int verify_one_pack(const char *path, unsigned int flags)
 {
-	struct child_process index_pack;
+	struct child_process index_pack = CHILD_PROCESS_INIT;
 	const char *argv[] = {"index-pack", NULL, NULL, NULL };
 	struct strbuf arg = STRBUF_INIT;
 	int verbose = flags & VERIFY_PACK_VERBOSE;
@@ -32,7 +32,6 @@
 		strbuf_addstr(&arg, ".pack");
 	argv[2] = arg.buf;
 
-	memset(&index_pack, 0, sizeof(index_pack));
 	index_pack.argv = argv;
 	index_pack.git_cmd = 1;
 
diff --git a/bundle.c b/bundle.c
index 71a21a6..b2b89fe 100644
--- a/bundle.c
+++ b/bundle.c
@@ -221,8 +221,8 @@
 	line = memmem(buf, size, "\ntagger ", 8);
 	if (!line++)
 		return 1;
-	lineend = memchr(line, buf + size - line, '\n');
-	line = memchr(line, lineend ? lineend - line : buf + size - line, '>');
+	lineend = memchr(line, '\n', buf + size - line);
+	line = memchr(line, '>', lineend ? lineend - line : buf + size - line);
 	if (!line++)
 		return 1;
 	date = strtoul(line, NULL, 10);
@@ -240,7 +240,7 @@
 	int i, ref_count = 0;
 	struct strbuf buf = STRBUF_INIT;
 	struct rev_info revs;
-	struct child_process rls;
+	struct child_process rls = CHILD_PROCESS_INIT;
 	FILE *rls_fout;
 
 	bundle_to_stdout = !strcmp(path, "-");
@@ -258,7 +258,6 @@
 	init_revisions(&revs, NULL);
 
 	/* write prerequisites */
-	memset(&rls, 0, sizeof(rls));
 	argv_array_pushl(&rls.args,
 			 "rev-list", "--boundary", "--pretty=oneline",
 			 NULL);
@@ -417,14 +416,13 @@
 {
 	const char *argv_index_pack[] = {"index-pack",
 					 "--fix-thin", "--stdin", NULL, NULL};
-	struct child_process ip;
+	struct child_process ip = CHILD_PROCESS_INIT;
 
 	if (flags & BUNDLE_VERBOSE)
 		argv_index_pack[3] = "-v";
 
 	if (verify_bundle(header, 0))
 		return -1;
-	memset(&ip, 0, sizeof(ip));
 	ip.argv = argv_index_pack;
 	ip.in = bundle_fd;
 	ip.no_stdout = 1;
diff --git a/cache-tree.c b/cache-tree.c
index c53f7de..75a54fd 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -246,9 +246,12 @@
 	struct strbuf buffer;
 	int missing_ok = flags & WRITE_TREE_MISSING_OK;
 	int dryrun = flags & WRITE_TREE_DRY_RUN;
+	int repair = flags & WRITE_TREE_REPAIR;
 	int to_invalidate = 0;
 	int i;
 
+	assert(!(dryrun && repair));
+
 	*skip_count = 0;
 
 	if (0 <= it->entry_count && has_sha1_file(it->sha1))
@@ -320,6 +323,7 @@
 		int pathlen, entlen;
 		const unsigned char *sha1;
 		unsigned mode;
+		int expected_missing = 0;
 
 		path = ce->name;
 		pathlen = ce_namelen(ce);
@@ -336,8 +340,10 @@
 			i += sub->count;
 			sha1 = sub->cache_tree->sha1;
 			mode = S_IFDIR;
-			if (sub->cache_tree->entry_count < 0)
+			if (sub->cache_tree->entry_count < 0) {
 				to_invalidate = 1;
+				expected_missing = 1;
+			}
 		}
 		else {
 			sha1 = ce->sha1;
@@ -347,6 +353,8 @@
 		}
 		if (mode != S_IFGITLINK && !missing_ok && !has_sha1_file(sha1)) {
 			strbuf_release(&buffer);
+			if (expected_missing)
+				return -1;
 			return error("invalid object %06o %s for '%.*s'",
 				mode, sha1_to_hex(sha1), entlen+baselen, path);
 		}
@@ -381,7 +389,14 @@
 #endif
 	}
 
-	if (dryrun)
+	if (repair) {
+		unsigned char sha1[20];
+		hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
+		if (has_sha1_file(sha1))
+			hashcpy(it->sha1, sha1);
+		else
+			to_invalidate = 1;
+	} else if (dryrun)
 		hash_sha1_file(buffer.buf, buffer.len, tree_type, it->sha1);
 	else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->sha1)) {
 		strbuf_release(&buffer);
diff --git a/cache-tree.h b/cache-tree.h
index b47ccec..aa7b3e4 100644
--- a/cache-tree.h
+++ b/cache-tree.h
@@ -39,6 +39,7 @@
 #define WRITE_TREE_IGNORE_CACHE_TREE 2
 #define WRITE_TREE_DRY_RUN 4
 #define WRITE_TREE_SILENT 8
+#define WRITE_TREE_REPAIR 16
 
 /* error return codes */
 #define WRITE_TREE_UNREADABLE_INDEX (-1)
diff --git a/cache.h b/cache.h
index fcb511d..db4ccd1 100644
--- a/cache.h
+++ b/cache.h
@@ -8,6 +8,7 @@
 #include "gettext.h"
 #include "convert.h"
 #include "trace.h"
+#include "string-list.h"
 
 #include SHA1_HEADER
 #ifndef git_SHA_CTX
@@ -585,6 +586,7 @@
 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 extern int commit_lock_file(struct lock_file *);
+extern int reopen_lock_file(struct lock_file *);
 extern void update_index_if_able(struct index_state *, struct lock_file *);
 
 extern int hold_locked_index(struct lock_file *, int);
@@ -1037,6 +1039,7 @@
 	DATE_SHORT,
 	DATE_LOCAL,
 	DATE_ISO8601,
+	DATE_ISO8601_STRICT,
 	DATE_RFC2822,
 	DATE_RAW
 };
@@ -1044,10 +1047,10 @@
 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 void show_date_relative(unsigned long time, int tz, const struct timeval *now,
 			struct strbuf *timebuf);
-int parse_date(const char *date, char *buf, int bufsize);
+int parse_date(const char *date, struct strbuf *out);
 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 int parse_expiry_date(const char *date, unsigned long *timestamp);
-void datestamp(char *buf, int bufsize);
+void datestamp(struct strbuf *out);
 #define approxidate(s) approxidate_careful((s), NULL)
 unsigned long approxidate_careful(const char *, int *);
 unsigned long approxidate_relative(const char *date, const struct timeval *now);
@@ -1061,6 +1064,7 @@
 extern const char *git_committer_info(int);
 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 extern const char *fmt_name(const char *name, const char *email);
+extern const char *ident_default_name(void);
 extern const char *ident_default_email(void);
 extern const char *git_editor(void);
 extern const char *git_pager(int stdout_is_tty);
@@ -1294,7 +1298,7 @@
 			       const char *buf, size_t len, void *data);
 extern void git_config_push_parameter(const char *text);
 extern int git_config_from_parameters(config_fn_t fn, void *data);
-extern int git_config(config_fn_t fn, void *);
+extern void git_config(config_fn_t fn, void *);
 extern int git_config_with_options(config_fn_t fn, void *,
 				   struct git_config_source *config_source,
 				   int respect_includes);
@@ -1351,6 +1355,69 @@
 			    const char **subsection, int *subsection_len,
 			    const char **key);
 
+struct config_set_element {
+	struct hashmap_entry ent;
+	char *key;
+	struct string_list value_list;
+};
+
+struct configset_list_item {
+	struct config_set_element *e;
+	int value_index;
+};
+
+/*
+ * the contents of the list are ordered according to their
+ * position in the config files and order of parsing the files.
+ * (i.e. key-value pair at the last position of .git/config will
+ * be at the last item of the list)
+ */
+struct configset_list {
+	struct configset_list_item *items;
+	unsigned int nr, alloc;
+};
+
+struct config_set {
+	struct hashmap config_hash;
+	int hash_initialized;
+	struct configset_list list;
+};
+
+extern void git_configset_init(struct config_set *cs);
+extern int git_configset_add_file(struct config_set *cs, const char *filename);
+extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
+extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
+extern void git_configset_clear(struct config_set *cs);
+extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
+extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
+extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
+extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
+extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
+extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
+extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
+extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
+
+extern int git_config_get_value(const char *key, const char **value);
+extern const struct string_list *git_config_get_value_multi(const char *key);
+extern void git_config_clear(void);
+extern void git_config_iter(config_fn_t fn, void *data);
+extern int git_config_get_string_const(const char *key, const char **dest);
+extern int git_config_get_string(const char *key, char **dest);
+extern int git_config_get_int(const char *key, int *dest);
+extern int git_config_get_ulong(const char *key, unsigned long *dest);
+extern int git_config_get_bool(const char *key, int *dest);
+extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
+extern int git_config_get_maybe_bool(const char *key, int *dest);
+extern int git_config_get_pathname(const char *key, const char **dest);
+
+struct key_value_info {
+	const char *filename;
+	int linenr;
+};
+
+extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
+extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
+
 extern int committer_ident_sufficiently_given(void);
 extern int author_ident_sufficiently_given(void);
 
diff --git a/column.c b/column.c
index ca878bc..76b615d 100644
--- a/column.c
+++ b/column.c
@@ -367,7 +367,7 @@
 }
 
 static int fd_out = -1;
-static struct child_process column_process;
+static struct child_process column_process = CHILD_PROCESS_INIT;
 
 int run_column_filter(int colopts, const struct column_options *opts)
 {
diff --git a/combine-diff.c b/combine-diff.c
index 60cb4f8..91edce5 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1407,7 +1407,8 @@
 		show_log(rev);
 
 		if (rev->verbose_header && opt->output_format &&
-		    opt->output_format != DIFF_FORMAT_NO_OUTPUT)
+		    opt->output_format != DIFF_FORMAT_NO_OUTPUT &&
+		    !commit_format_is_empty(rev->commit_format))
 			printf("%s%c", diff_line_prefix(opt),
 			       opt->line_termination);
 	}
diff --git a/commit.c b/commit.c
index ae7f2b1..9c4439f 100644
--- a/commit.c
+++ b/commit.c
@@ -584,25 +584,19 @@
 static void record_author_date(struct author_date_slab *author_date,
 			       struct commit *commit)
 {
-	const char *buf, *line_end, *ident_line;
 	const char *buffer = get_commit_buffer(commit, NULL);
 	struct ident_split ident;
+	const char *ident_line;
+	size_t ident_len;
 	char *date_end;
 	unsigned long date;
 
-	for (buf = buffer; buf; buf = line_end + 1) {
-		line_end = strchrnul(buf, '\n');
-		if (!skip_prefix(buf, "author ", &ident_line)) {
-			if (!line_end[0] || line_end[1] == '\n')
-				return; /* end of header */
-			continue;
-		}
-		if (split_ident_line(&ident,
-				     ident_line, line_end - ident_line) ||
-		    !ident.date_begin || !ident.date_end)
-			goto fail_exit; /* malformed "author" line */
-		break;
-	}
+	ident_line = find_commit_header(buffer, "author", &ident_len);
+	if (!ident_line)
+		goto fail_exit; /* no author line */
+	if (split_ident_line(&ident, ident_line, ident_len) ||
+	    !ident.date_begin || !ident.date_end)
+		goto fail_exit; /* malformed "author" line */
 
 	date = strtoul(ident.date_begin, &date_end, 10);
 	if (date_end != ident.date_end)
@@ -1256,7 +1250,7 @@
 	}
 }
 
-void check_commit_signature(const struct commit* commit, struct signature_check *sigc)
+void check_commit_signature(const struct commit *commit, struct signature_check *sigc)
 {
 	struct strbuf payload = STRBUF_INIT;
 	struct strbuf signature = STRBUF_INIT;
@@ -1660,3 +1654,25 @@
 		printf(format, sha1_to_hex(list->item->object.sha1));
 	}
 }
+
+const char *find_commit_header(const char *msg, const char *key, size_t *out_len)
+{
+	int key_len = strlen(key);
+	const char *line = msg;
+
+	while (line) {
+		const char *eol = strchrnul(line, '\n');
+
+		if (line == eol)
+			return NULL;
+
+		if (eol - line > key_len &&
+		    !strncmp(line, key, key_len) &&
+		    line[key_len] == ' ') {
+			*out_len = eol - line - key_len - 1;
+			return line + key_len + 1;
+		}
+		line = *eol ? eol + 1 : NULL;
+	}
+	return NULL;
+}
diff --git a/commit.h b/commit.h
index a8cbf52..bc68ccb 100644
--- a/commit.h
+++ b/commit.h
@@ -26,13 +26,25 @@
 extern const char *commit_type;
 
 /* While we can decorate any object with a name, it's only used for commits.. */
-extern struct decoration name_decoration;
 struct name_decoration {
 	struct name_decoration *next;
 	int type;
-	char name[1];
+	char name[FLEX_ARRAY];
 };
 
+enum decoration_type {
+	DECORATION_NONE = 0,
+	DECORATION_REF_LOCAL,
+	DECORATION_REF_REMOTE,
+	DECORATION_REF_TAG,
+	DECORATION_REF_STASH,
+	DECORATION_REF_HEAD,
+	DECORATION_GRAFTED,
+};
+
+void add_name_decoration(enum decoration_type type, const char *name, struct object *obj);
+const struct name_decoration *get_name_decoration(const struct object *obj);
+
 struct commit *lookup_commit(const unsigned char *sha1);
 struct commit *lookup_commit_reference(const unsigned char *sha1);
 struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
@@ -159,6 +171,7 @@
 extern const char *format_subject(struct strbuf *sb, const char *msg,
 				  const char *line_separator);
 extern void userformat_find_requirements(const char *fmt, struct userformat_want *w);
+extern int commit_format_is_empty(enum cmit_fmt);
 extern void format_commit_message(const struct commit *commit,
 				  const char *format, struct strbuf *sb,
 				  const struct pretty_print_context *context);
@@ -313,6 +326,17 @@
 
 extern void free_commit_extra_headers(struct commit_extra_header *extra);
 
+/*
+ * Search the commit object contents given by "msg" for the header "key".
+ * Returns a pointer to the start of the header contents, or NULL. The length
+ * of the header, up to the first newline, is returned via out_len.
+ *
+ * Note that some headers (like mergetag) may be multi-line. It is the caller's
+ * responsibility to parse further in this case!
+ */
+extern const char *find_commit_header(const char *msg, const char *key,
+				      size_t *out_len);
+
 typedef void (*each_mergetag_fn)(struct commit *commit, struct commit_extra_header *extra,
 				 void *cb_data);
 
@@ -346,7 +370,7 @@
  * at all.  This may allocate memory for sig->gpg_output, sig->gpg_status,
  * sig->signer and sig->key.
  */
-extern void check_commit_signature(const struct commit* commit, struct signature_check *sigc);
+extern void check_commit_signature(const struct commit *commit, struct signature_check *sigc);
 
 int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
 
diff --git a/config.c b/config.c
index 058505c..179b681 100644
--- a/config.c
+++ b/config.c
@@ -9,6 +9,8 @@
 #include "exec_cmd.h"
 #include "strbuf.h"
 #include "quote.h"
+#include "hashmap.h"
+#include "string-list.h"
 
 struct config_source {
 	struct config_source *prev;
@@ -37,6 +39,13 @@
 
 static int zlib_compression_seen;
 
+/*
+ * Default config_set that contains key-value pairs from the usual set of config
+ * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
+ * config file and the global /etc/gitconfig)
+ */
+static struct config_set the_config_set;
+
 static int config_file_fgetc(struct config_source *conf)
 {
 	return fgetc(conf->u.file);
@@ -127,7 +136,6 @@
 int git_config_include(const char *var, const char *value, void *data)
 {
 	struct config_include_data *inc = data;
-	const char *type;
 	int ret;
 
 	/*
@@ -138,10 +146,7 @@
 	if (ret < 0)
 		return ret;
 
-	if (!skip_prefix(var, "include.", &type))
-		return ret;
-
-	if (!strcmp(type, "path"))
+	if (!strcmp(var, "include.path"))
 		ret = handle_path_include(value, inc);
 	return ret;
 }
@@ -162,19 +167,27 @@
 int git_config_parse_parameter(const char *text,
 			       config_fn_t fn, void *data)
 {
+	const char *value;
 	struct strbuf **pair;
+
 	pair = strbuf_split_str(text, '=', 2);
 	if (!pair[0])
 		return error("bogus config parameter: %s", text);
-	if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
+
+	if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
 		strbuf_setlen(pair[0], pair[0]->len - 1);
+		value = pair[1] ? pair[1]->buf : "";
+	} else {
+		value = NULL;
+	}
+
 	strbuf_trim(pair[0]);
 	if (!pair[0]->len) {
 		strbuf_list_free(pair);
 		return error("bogus config parameter: %s", text);
 	}
 	strbuf_tolower(pair[0]);
-	if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
+	if (fn(pair[0]->buf, value, data) < 0) {
 		strbuf_list_free(pair);
 		return -1;
 	}
@@ -229,6 +242,7 @@
 		cf->linenr++;
 	if (c == EOF) {
 		cf->eof = 1;
+		cf->linenr++;
 		c = '\n';
 	}
 	return c;
@@ -304,6 +318,7 @@
 {
 	int c;
 	char *value;
+	int ret;
 
 	/* Get the full name */
 	for (;;) {
@@ -326,7 +341,15 @@
 		if (!value)
 			return -1;
 	}
-	return fn(name->buf, value, data);
+	/*
+	 * We already consumed the \n, but we need linenr to point to
+	 * the line we just parsed during the call to fn to get
+	 * accurate line number in error messages.
+	 */
+	cf->linenr--;
+	ret = fn(name->buf, value, data);
+	cf->linenr++;
+	return ret;
 }
 
 static int get_extended_base_var(struct strbuf *name, int c)
@@ -442,9 +465,9 @@
 			break;
 	}
 	if (cf->die_on_error)
-		die("bad config file line %d in %s", cf->linenr, cf->name);
+		die(_("bad config file line %d in %s"), cf->linenr, cf->name);
 	else
-		return error("bad config file line %d in %s", cf->linenr, cf->name);
+		return error(_("bad config file line %d in %s"), cf->linenr, cf->name);
 }
 
 static int parse_unit_factor(const char *end, uintmax_t *val)
@@ -560,9 +583,9 @@
 		value = "";
 
 	if (cf && cf->name)
-		die("bad numeric config value '%s' for '%s' in %s: %s",
+		die(_("bad numeric config value '%s' for '%s' in %s: %s"),
 		    value, name, cf->name, reason);
-	die("bad numeric config value '%s' for '%s': %s", value, name, reason);
+	die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
 }
 
 int git_config_int(const char *name, const char *value)
@@ -647,7 +670,7 @@
 		return config_error_nonbool(var);
 	*dest = expand_user_path(value);
 	if (!*dest)
-		die("Failed to expand user dir in: '%s'", value);
+		die(_("failed to expand user dir in: '%s'"), value);
 	return 0;
 }
 
@@ -725,7 +748,7 @@
 		if (level == -1)
 			level = Z_DEFAULT_COMPRESSION;
 		else if (level < 0 || level > Z_BEST_COMPRESSION)
-			die("bad zlib compression level %d", level);
+			die(_("bad zlib compression level %d"), level);
 		zlib_compression_level = level;
 		zlib_compression_seen = 1;
 		return 0;
@@ -736,7 +759,7 @@
 		if (level == -1)
 			level = Z_DEFAULT_COMPRESSION;
 		else if (level < 0 || level > Z_BEST_COMPRESSION)
-			die("bad zlib compression level %d", level);
+			die(_("bad zlib compression level %d"), level);
 		core_compression_level = level;
 		core_compression_seen = 1;
 		if (!zlib_compression_seen)
@@ -858,7 +881,7 @@
 		else if (!strcmp(value, "link"))
 			object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
 		else
-			die("Invalid mode for object creation: %s", value);
+			die(_("invalid mode for object creation: %s"), value);
 		return 0;
 	}
 
@@ -1158,7 +1181,7 @@
 
 	switch (git_config_from_parameters(fn, data)) {
 	case -1: /* error */
-		die("unable to parse command-line config");
+		die(_("unable to parse command-line config"));
 		break;
 	case 0: /* found nothing */
 		break;
@@ -1205,9 +1228,365 @@
 	return ret;
 }
 
-int git_config(config_fn_t fn, void *data)
+static void git_config_raw(config_fn_t fn, void *data)
 {
-	return git_config_with_options(fn, data, NULL, 1);
+	if (git_config_with_options(fn, data, NULL, 1) < 0)
+		/*
+		 * git_config_with_options() normally returns only
+		 * positive values, as most errors are fatal, and
+		 * non-fatal potential errors are guarded by "if"
+		 * statements that are entered only when no error is
+		 * possible.
+		 *
+		 * If we ever encounter a non-fatal error, it means
+		 * something went really wrong and we should stop
+		 * immediately.
+		 */
+		die(_("unknown error occured while reading the configuration files"));
+}
+
+static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
+{
+	int i, value_index;
+	struct string_list *values;
+	struct config_set_element *entry;
+	struct configset_list *list = &cs->list;
+	struct key_value_info *kv_info;
+
+	for (i = 0; i < list->nr; i++) {
+		entry = list->items[i].e;
+		value_index = list->items[i].value_index;
+		values = &entry->value_list;
+		if (fn(entry->key, values->items[value_index].string, data) < 0) {
+			kv_info = values->items[value_index].util;
+			git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
+		}
+	}
+}
+
+static void git_config_check_init(void);
+
+void git_config(config_fn_t fn, void *data)
+{
+	git_config_check_init();
+	configset_iter(&the_config_set, fn, data);
+}
+
+static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
+{
+	struct config_set_element k;
+	struct config_set_element *found_entry;
+	char *normalized_key;
+	int ret;
+	/*
+	 * `key` may come from the user, so normalize it before using it
+	 * for querying entries from the hashmap.
+	 */
+	ret = git_config_parse_key(key, &normalized_key, NULL);
+
+	if (ret)
+		return NULL;
+
+	hashmap_entry_init(&k, strhash(normalized_key));
+	k.key = normalized_key;
+	found_entry = hashmap_get(&cs->config_hash, &k, NULL);
+	free(normalized_key);
+	return found_entry;
+}
+
+static int configset_add_value(struct config_set *cs, const char *key, const char *value)
+{
+	struct config_set_element *e;
+	struct string_list_item *si;
+	struct configset_list_item *l_item;
+	struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
+
+	e = configset_find_element(cs, key);
+	/*
+	 * Since the keys are being fed by git_config*() callback mechanism, they
+	 * are already normalized. So simply add them without any further munging.
+	 */
+	if (!e) {
+		e = xmalloc(sizeof(*e));
+		hashmap_entry_init(e, strhash(key));
+		e->key = xstrdup(key);
+		string_list_init(&e->value_list, 1);
+		hashmap_add(&cs->config_hash, e);
+	}
+	si = string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
+
+	ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
+	l_item = &cs->list.items[cs->list.nr++];
+	l_item->e = e;
+	l_item->value_index = e->value_list.nr - 1;
+
+	if (cf) {
+		kv_info->filename = strintern(cf->name);
+		kv_info->linenr = cf->linenr;
+	} else {
+		/* for values read from `git_config_from_parameters()` */
+		kv_info->filename = NULL;
+		kv_info->linenr = -1;
+	}
+	si->util = kv_info;
+
+	return 0;
+}
+
+static int config_set_element_cmp(const struct config_set_element *e1,
+				 const struct config_set_element *e2, const void *unused)
+{
+	return strcmp(e1->key, e2->key);
+}
+
+void git_configset_init(struct config_set *cs)
+{
+	hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
+	cs->hash_initialized = 1;
+	cs->list.nr = 0;
+	cs->list.alloc = 0;
+	cs->list.items = NULL;
+}
+
+void git_configset_clear(struct config_set *cs)
+{
+	struct config_set_element *entry;
+	struct hashmap_iter iter;
+	if (!cs->hash_initialized)
+		return;
+
+	hashmap_iter_init(&cs->config_hash, &iter);
+	while ((entry = hashmap_iter_next(&iter))) {
+		free(entry->key);
+		string_list_clear(&entry->value_list, 1);
+	}
+	hashmap_free(&cs->config_hash, 1);
+	cs->hash_initialized = 0;
+	free(cs->list.items);
+	cs->list.nr = 0;
+	cs->list.alloc = 0;
+	cs->list.items = NULL;
+}
+
+static int config_set_callback(const char *key, const char *value, void *cb)
+{
+	struct config_set *cs = cb;
+	configset_add_value(cs, key, value);
+	return 0;
+}
+
+int git_configset_add_file(struct config_set *cs, const char *filename)
+{
+	return git_config_from_file(config_set_callback, filename, cs);
+}
+
+int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
+{
+	const struct string_list *values = NULL;
+	/*
+	 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
+	 * queried key in the files of the configset, the value returned will be the last
+	 * value in the value list for that key.
+	 */
+	values = git_configset_get_value_multi(cs, key);
+
+	if (!values)
+		return 1;
+	assert(values->nr > 0);
+	*value = values->items[values->nr - 1].string;
+	return 0;
+}
+
+const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
+{
+	struct config_set_element *e = configset_find_element(cs, key);
+	return e ? &e->value_list : NULL;
+}
+
+int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value))
+		return git_config_string(dest, key, value);
+	else
+		return 1;
+}
+
+int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
+{
+	return git_configset_get_string_const(cs, key, (const char **)dest);
+}
+
+int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value)) {
+		*dest = git_config_int(key, value);
+		return 0;
+	} else
+		return 1;
+}
+
+int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value)) {
+		*dest = git_config_ulong(key, value);
+		return 0;
+	} else
+		return 1;
+}
+
+int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value)) {
+		*dest = git_config_bool(key, value);
+		return 0;
+	} else
+		return 1;
+}
+
+int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
+				int *is_bool, int *dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value)) {
+		*dest = git_config_bool_or_int(key, value, is_bool);
+		return 0;
+	} else
+		return 1;
+}
+
+int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value)) {
+		*dest = git_config_maybe_bool(key, value);
+		if (*dest == -1)
+			return -1;
+		return 0;
+	} else
+		return 1;
+}
+
+int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
+{
+	const char *value;
+	if (!git_configset_get_value(cs, key, &value))
+		return git_config_pathname(dest, key, value);
+	else
+		return 1;
+}
+
+static void git_config_check_init(void)
+{
+	if (the_config_set.hash_initialized)
+		return;
+	git_configset_init(&the_config_set);
+	git_config_raw(config_set_callback, &the_config_set);
+}
+
+void git_config_clear(void)
+{
+	if (!the_config_set.hash_initialized)
+		return;
+	git_configset_clear(&the_config_set);
+}
+
+int git_config_get_value(const char *key, const char **value)
+{
+	git_config_check_init();
+	return git_configset_get_value(&the_config_set, key, value);
+}
+
+const struct string_list *git_config_get_value_multi(const char *key)
+{
+	git_config_check_init();
+	return git_configset_get_value_multi(&the_config_set, key);
+}
+
+int git_config_get_string_const(const char *key, const char **dest)
+{
+	int ret;
+	git_config_check_init();
+	ret = git_configset_get_string_const(&the_config_set, key, dest);
+	if (ret < 0)
+		git_die_config(key, NULL);
+	return ret;
+}
+
+int git_config_get_string(const char *key, char **dest)
+{
+	git_config_check_init();
+	return git_config_get_string_const(key, (const char **)dest);
+}
+
+int git_config_get_int(const char *key, int *dest)
+{
+	git_config_check_init();
+	return git_configset_get_int(&the_config_set, key, dest);
+}
+
+int git_config_get_ulong(const char *key, unsigned long *dest)
+{
+	git_config_check_init();
+	return git_configset_get_ulong(&the_config_set, key, dest);
+}
+
+int git_config_get_bool(const char *key, int *dest)
+{
+	git_config_check_init();
+	return git_configset_get_bool(&the_config_set, key, dest);
+}
+
+int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
+{
+	git_config_check_init();
+	return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
+}
+
+int git_config_get_maybe_bool(const char *key, int *dest)
+{
+	git_config_check_init();
+	return git_configset_get_maybe_bool(&the_config_set, key, dest);
+}
+
+int git_config_get_pathname(const char *key, const char **dest)
+{
+	int ret;
+	git_config_check_init();
+	ret = git_configset_get_pathname(&the_config_set, key, dest);
+	if (ret < 0)
+		git_die_config(key, NULL);
+	return ret;
+}
+
+NORETURN
+void git_die_config_linenr(const char *key, const char *filename, int linenr)
+{
+	if (!filename)
+		die(_("unable to parse '%s' from command-line config"), key);
+	else
+		die(_("bad config variable '%s' in file '%s' at line %d"),
+		    key, filename, linenr);
+}
+
+NORETURN __attribute__((format(printf, 2, 3)))
+void git_die_config(const char *key, const char *err, ...)
+{
+	const struct string_list *values;
+	struct key_value_info *kv_info;
+
+	if (err) {
+		va_list params;
+		va_start(params, err);
+		vreportf("error: ", err, params);
+		va_end(params);
+	}
+	values = git_config_get_value_multi(key);
+	kv_info = values->items[values->nr - 1].util;
+	git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
 }
 
 /*
@@ -1243,7 +1622,7 @@
 	case KEY_SEEN:
 		if (matches(key, value)) {
 			if (store.seen == 1 && store.multi_replace == 0) {
-				warning("%s has multiple values", key);
+				warning(_("%s has multiple values"), key);
 			}
 
 			ALLOC_GROW(store.offset, store.seen + 1,
@@ -1705,6 +2084,9 @@
 	lock = NULL;
 	ret = 0;
 
+	/* Invalidate the config cache */
+	git_config_clear();
+
 out_free:
 	if (lock)
 		rollback_lock_file(lock);
diff --git a/config.mak.uname b/config.mak.uname
index 15ee15e..a2f380f 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -89,8 +89,13 @@
 	NEEDS_CRYPTO_WITH_SSL = YesPlease
 	NEEDS_SSL_WITH_CRYPTO = YesPlease
 	NEEDS_LIBICONV = YesPlease
+	# Note: $(uname_R) gives us the underlying Darwin version.
+	# - MacOS 10.0.* and MacOS 10.1.0 = Darwin 1.*
+	# - MacOS 10.x.* = Darwin (x+4).* for (1 <= x)
+	# i.e. "begins with [15678] and a dot" means "10.4.* or older".
 	ifeq ($(shell expr "$(uname_R)" : '[15678]\.'),2)
 		OLD_ICONV = UnfortunatelyYes
+		NO_APPLE_COMMON_CRYPTO = YesPlease
 	endif
 	ifeq ($(shell expr "$(uname_R)" : '[15]\.'),2)
 		NO_STRLCPY = YesPlease
diff --git a/connect.c b/connect.c
index 5047402..d47d0ec 100644
--- a/connect.c
+++ b/connect.c
@@ -13,28 +13,24 @@
 static char *server_capabilities;
 static const char *parse_feature_value(const char *, const char *, int *);
 
-static int check_ref(const char *name, int len, unsigned int flags)
+static int check_ref(const char *name, unsigned int flags)
 {
 	if (!flags)
 		return 1;
 
-	if (len < 5 || memcmp(name, "refs/", 5))
+	if (!skip_prefix(name, "refs/", &name))
 		return 0;
 
-	/* Skip the "refs/" part */
-	name += 5;
-	len -= 5;
-
 	/* REF_NORMAL means that we don't want the magic fake tag refs */
 	if ((flags & REF_NORMAL) && check_refname_format(name, 0))
 		return 0;
 
 	/* REF_HEADS means that we want regular branch heads */
-	if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6))
+	if ((flags & REF_HEADS) && starts_with(name, "heads/"))
 		return 1;
 
 	/* REF_TAGS means that we want tags */
-	if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5))
+	if ((flags & REF_TAGS) && starts_with(name, "tags/"))
 		return 1;
 
 	/* All type bits clear means that we are ok with anything */
@@ -43,7 +39,7 @@
 
 int check_ref_type(const struct ref *ref, int flags)
 {
-	return check_ref(ref->name, strlen(ref->name), flags);
+	return check_ref(ref->name, flags);
 }
 
 static void die_initial_contact(int got_at_least_one_head)
@@ -167,7 +163,7 @@
 			continue;
 		}
 
-		if (!check_ref(name, name_len, flags))
+		if (!check_ref(name, flags))
 			continue;
 		ref = alloc_ref(buffer + 41);
 		hashcpy(ref->old_sha1, old_sha1);
@@ -537,7 +533,8 @@
 
 	get_host_and_port(&host, &port);
 
-	proxy = xcalloc(1, sizeof(*proxy));
+	proxy = xmalloc(sizeof(*proxy));
+	child_process_init(proxy);
 	argv_array_push(&proxy->args, git_proxy_command);
 	argv_array_push(&proxy->args, host);
 	argv_array_push(&proxy->args, port);
@@ -639,7 +636,7 @@
 	return protocol;
 }
 
-static struct child_process no_fork;
+static struct child_process no_fork = CHILD_PROCESS_INIT;
 
 /*
  * This returns a dummy child_process if the transport protocol does not
@@ -694,7 +691,8 @@
 			     target_host, 0);
 		free(target_host);
 	} else {
-		conn = xcalloc(1, sizeof(*conn));
+		conn = xmalloc(sizeof(*conn));
+		child_process_init(conn);
 
 		strbuf_addstr(&cmd, prog);
 		strbuf_addch(&cmd, ' ');
diff --git a/connected.c b/connected.c
index dae9c99..299c560 100644
--- a/connected.c
+++ b/connected.c
@@ -25,7 +25,7 @@
 					   struct transport *transport,
 					   const char *shallow_file)
 {
-	struct child_process rev_list;
+	struct child_process rev_list = CHILD_PROCESS_INIT;
 	const char *argv[9];
 	char commit[41];
 	unsigned char sha1[20];
@@ -60,7 +60,6 @@
 		argv[ac++] = "--quiet";
 	argv[ac] = NULL;
 
-	memset(&rev_list, 0, sizeof(rev_list));
 	rev_list.argv = argv;
 	rev_list.git_cmd = 1;
 	rev_list.in = -1;
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 9d684b1..c5473dc 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -468,7 +468,8 @@
 			fi
 		fi
 		if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
-		   [ -r "$g/refs/stash" ]; then
+		   git rev-parse --verify --quiet refs/stash >/dev/null
+		then
 			s="$"
 		fi
 
diff --git a/contrib/subtree/Makefile b/contrib/subtree/Makefile
index d9a0ce2..c2bd703 100644
--- a/contrib/subtree/Makefile
+++ b/contrib/subtree/Makefile
@@ -1,3 +1,6 @@
+# The default target of this Makefile is...
+all::
+
 -include ../../config.mak.autogen
 -include ../../config.mak
 
@@ -34,7 +37,7 @@
 GIT_SUBTREE_TXT := git-subtree.txt
 GIT_SUBTREE_HTML := git-subtree.html
 
-all: $(GIT_SUBTREE)
+all:: $(GIT_SUBTREE)
 
 $(GIT_SUBTREE): $(GIT_SUBTREE_SH)
 	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' $< >$@
diff --git a/contrib/svn-fe/Makefile b/contrib/svn-fe/Makefile
index 360d8da..e8651aa 100644
--- a/contrib/svn-fe/Makefile
+++ b/contrib/svn-fe/Makefile
@@ -1,18 +1,58 @@
 all:: svn-fe$X
 
-CC = gcc
+CC = cc
 RM = rm -f
 MV = mv
 
 CFLAGS = -g -O2 -Wall
 LDFLAGS =
-ALL_CFLAGS = $(CFLAGS)
-ALL_LDFLAGS = $(LDFLAGS)
-EXTLIBS =
+EXTLIBS = -lz
+
+include ../../config.mak.uname
+-include ../../config.mak.autogen
+-include ../../config.mak
+
+ifeq ($(uname_S),Darwin)
+	ifndef NO_FINK
+		ifeq ($(shell test -d /sw/lib && echo y),y)
+			CFLAGS += -I/sw/include
+			LDFLAGS += -L/sw/lib
+		endif
+	endif
+	ifndef NO_DARWIN_PORTS
+		ifeq ($(shell test -d /opt/local/lib && echo y),y)
+			CFLAGS += -I/opt/local/include
+			LDFLAGS += -L/opt/local/lib
+		endif
+	endif
+endif
+
+ifndef NO_OPENSSL
+	EXTLIBS += -lssl
+	ifdef NEEDS_CRYPTO_WITH_SSL
+		EXTLIBS += -lcrypto
+	endif
+endif
+
+ifndef NO_PTHREADS
+	CFLAGS += $(PTHREADS_CFLAGS)
+	EXTLIBS += $(PTHREAD_LIBS)
+endif
+
+ifdef HAVE_CLOCK_GETTIME
+	CFLAGS += -DHAVE_CLOCK_GETTIME
+	EXTLIBS += -lrt
+endif
+
+ifdef NEEDS_LIBICONV
+	EXTLIBS += -liconv
+endif
 
 GIT_LIB = ../../libgit.a
 VCSSVN_LIB = ../../vcs-svn/lib.a
-LIBS = $(VCSSVN_LIB) $(GIT_LIB) $(EXTLIBS)
+XDIFF_LIB = ../../xdiff/lib.a
+
+LIBS = $(VCSSVN_LIB) $(GIT_LIB) $(XDIFF_LIB)
 
 QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
 QUIET_SUBDIR1 =
@@ -33,12 +73,11 @@
 endif
 endif
 
-svn-fe$X: svn-fe.o $(VCSSVN_LIB) $(GIT_LIB)
-	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ svn-fe.o \
-		$(ALL_LDFLAGS) $(LIBS)
+svn-fe$X: svn-fe.o $(VCSSVN_LIB) $(XDIFF_LIB) $(GIT_LIB)
+	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(EXTLIBS) -o $@ svn-fe.o $(LIBS)
 
 svn-fe.o: svn-fe.c ../../vcs-svn/svndump.h
-	$(QUIET_CC)$(CC) -I../../vcs-svn -o $*.o -c $(ALL_CFLAGS) $<
+	$(QUIET_CC)$(CC) $(CFLAGS) -I../../vcs-svn -o $*.o -c $<
 
 svn-fe.html: svn-fe.txt
 	$(QUIET_SUBDIR0)../../Documentation $(QUIET_SUBDIR1) \
@@ -54,6 +93,9 @@
 ../../vcs-svn/lib.a: FORCE
 	$(QUIET_SUBDIR0)../.. $(QUIET_SUBDIR1) vcs-svn/lib.a
 
+../../xdiff/lib.a: FORCE
+	$(QUIET_SUBDIR0)../.. $(QUIET_SUBDIR1) xdiff/lib.a
+
 ../../libgit.a: FORCE
 	$(QUIET_SUBDIR0)../.. $(QUIET_SUBDIR1) libgit.a
 
diff --git a/convert.c b/convert.c
index cb5fbb4..aa7a139 100644
--- a/convert.c
+++ b/convert.c
@@ -321,7 +321,7 @@
 	/*
 	 * Spawn cmd and feed the buffer contents through its stdin.
 	 */
-	struct child_process child_process;
+	struct child_process child_process = CHILD_PROCESS_INIT;
 	struct filter_params *params = (struct filter_params *)data;
 	int write_err, status;
 	const char *argv[] = { NULL, NULL };
@@ -344,7 +344,6 @@
 
 	argv[0] = cmd.buf;
 
-	memset(&child_process, 0, sizeof(child_process));
 	child_process.argv = argv;
 	child_process.use_shell = 1;
 	child_process.in = -1;
diff --git a/credential-cache.c b/credential-cache.c
index 9a03792..8689a15 100644
--- a/credential-cache.c
+++ b/credential-cache.c
@@ -37,12 +37,11 @@
 
 static void spawn_daemon(const char *socket)
 {
-	struct child_process daemon;
+	struct child_process daemon = CHILD_PROCESS_INIT;
 	const char *argv[] = { NULL, NULL, NULL };
 	char buf[128];
 	int r;
 
-	memset(&daemon, 0, sizeof(daemon));
 	argv[0] = "git-credential-cache--daemon";
 	argv[1] = socket;
 	daemon.argv = argv;
diff --git a/credential.c b/credential.c
index 4d79d32..1886ea5 100644
--- a/credential.c
+++ b/credential.c
@@ -205,11 +205,10 @@
 				 const char *cmd,
 				 int want_output)
 {
-	struct child_process helper;
+	struct child_process helper = CHILD_PROCESS_INIT;
 	const char *argv[] = { NULL, NULL };
 	FILE *fp;
 
-	memset(&helper, 0, sizeof(helper));
 	argv[0] = cmd;
 	helper.argv = argv;
 	helper.use_shell = 1;
diff --git a/daemon.c b/daemon.c
index e6b51ed..4dcfff9 100644
--- a/daemon.c
+++ b/daemon.c
@@ -230,23 +230,6 @@
 	int overridable;
 };
 
-static struct daemon_service *service_looking_at;
-static int service_enabled;
-
-static int git_daemon_config(const char *var, const char *value, void *cb)
-{
-	const char *service;
-
-	if (skip_prefix(var, "daemon.", &service) &&
-	    !strcmp(service, service_looking_at->config_name)) {
-		service_enabled = git_config_bool(var, value);
-		return 0;
-	}
-
-	/* we are not interested in parsing any other configuration here */
-	return 0;
-}
-
 static int daemon_error(const char *dir, const char *msg)
 {
 	if (!informative_errors)
@@ -259,7 +242,7 @@
 
 static int run_access_hook(struct daemon_service *service, const char *dir, const char *path)
 {
-	struct child_process child;
+	struct child_process child = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
 	const char *argv[8];
 	const char **arg = argv;
@@ -277,7 +260,6 @@
 	*arg = NULL;
 #undef STRARG
 
-	memset(&child, 0, sizeof(child));
 	child.use_shell = 1;
 	child.argv = argv;
 	child.no_stdin = 1;
@@ -324,6 +306,7 @@
 {
 	const char *path;
 	int enabled = service->enabled;
+	struct strbuf var = STRBUF_INIT;
 
 	loginfo("Request %s for '%s'", service->name, dir);
 
@@ -354,11 +337,9 @@
 	}
 
 	if (service->overridable) {
-		service_looking_at = service;
-		service_enabled = -1;
-		git_config(git_daemon_config, NULL);
-		if (0 <= service_enabled)
-			enabled = service_enabled;
+		strbuf_addf(&var, "daemon.%s", service->config_name);
+		git_config_get_bool(var.buf, &enabled);
+		strbuf_release(&var);
 	}
 	if (!enabled) {
 		logerror("'%s': service not enabled for '%s'",
@@ -406,9 +387,8 @@
 
 static int run_service_command(const char **argv)
 {
-	struct child_process cld;
+	struct child_process cld = CHILD_PROCESS_INIT;
 
-	memset(&cld, 0, sizeof(cld));
 	cld.argv = argv;
 	cld.git_cmd = 1;
 	cld.err = -1;
@@ -733,7 +713,7 @@
 static char **cld_argv;
 static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
 {
-	struct child_process cld = { NULL };
+	struct child_process cld = CHILD_PROCESS_INIT;
 	char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
 	char *env[] = { addrbuf, portbuf, NULL };
 
diff --git a/date.c b/date.c
index 782de95..59dfe57 100644
--- a/date.c
+++ b/date.c
@@ -200,7 +200,16 @@
 				tm->tm_mday,
 				tm->tm_hour, tm->tm_min, tm->tm_sec,
 				tz);
-	else if (mode == DATE_RFC2822)
+	else if (mode == DATE_ISO8601_STRICT) {
+		char sign = (tz >= 0) ? '+' : '-';
+		tz = abs(tz);
+		strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
+				tm->tm_year + 1900,
+				tm->tm_mon + 1,
+				tm->tm_mday,
+				tm->tm_hour, tm->tm_min, tm->tm_sec,
+				sign, tz / 100, tz % 100);
+	} else if (mode == DATE_RFC2822)
 		strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d",
 			weekday_names[tm->tm_wday], tm->tm_mday,
 			month_names[tm->tm_mon], tm->tm_year + 1900,
@@ -605,7 +614,7 @@
 	return end - date;
 }
 
-static int date_string(unsigned long date, int offset, char *buf, int len)
+static void date_string(unsigned long date, int offset, struct strbuf *buf)
 {
 	int sign = '+';
 
@@ -613,7 +622,7 @@
 		offset = -offset;
 		sign = '-';
 	}
-	return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60);
+	strbuf_addf(buf, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60);
 }
 
 /*
@@ -735,13 +744,14 @@
 	return errors;
 }
 
-int parse_date(const char *date, char *result, int maxlen)
+int parse_date(const char *date, struct strbuf *result)
 {
 	unsigned long timestamp;
 	int offset;
 	if (parse_date_basic(date, &timestamp, &offset))
 		return -1;
-	return date_string(timestamp, offset, result, maxlen);
+	date_string(timestamp, offset, result);
+	return 0;
 }
 
 enum date_mode parse_date_format(const char *format)
@@ -751,6 +761,9 @@
 	else if (!strcmp(format, "iso8601") ||
 		 !strcmp(format, "iso"))
 		return DATE_ISO8601;
+	else if (!strcmp(format, "iso8601-strict") ||
+		 !strcmp(format, "iso-strict"))
+		return DATE_ISO8601_STRICT;
 	else if (!strcmp(format, "rfc2822") ||
 		 !strcmp(format, "rfc"))
 		return DATE_RFC2822;
@@ -766,7 +779,7 @@
 		die("unknown date format %s", format);
 }
 
-void datestamp(char *buf, int bufsize)
+void datestamp(struct strbuf *out)
 {
 	time_t now;
 	int offset;
@@ -776,7 +789,7 @@
 	offset = tm_to_time_t(localtime(&now)) - now;
 	offset /= 60;
 
-	date_string(now, offset, buf, bufsize);
+	date_string(now, offset, out);
 }
 
 /*
diff --git a/diff.c b/diff.c
index 867f034..d7a5c81 100644
--- a/diff.c
+++ b/diff.c
@@ -376,7 +376,7 @@
 {
 	if (!DIFF_FILE_VALID(one))
 		return 0;
-	diff_populate_filespec(one, 1);
+	diff_populate_filespec(one, CHECK_SIZE_ONLY);
 	return one->size;
 }
 
@@ -1910,11 +1910,11 @@
 			diff_free_filespec_data(p->one);
 			diff_free_filespec_data(p->two);
 		} else if (DIFF_FILE_VALID(p->one)) {
-			diff_populate_filespec(p->one, 1);
+			diff_populate_filespec(p->one, CHECK_SIZE_ONLY);
 			copied = added = 0;
 			diff_free_filespec_data(p->one);
 		} else if (DIFF_FILE_VALID(p->two)) {
-			diff_populate_filespec(p->two, 1);
+			diff_populate_filespec(p->two, CHECK_SIZE_ONLY);
 			copied = 0;
 			added = p->two->size;
 			diff_free_filespec_data(p->two);
@@ -2188,8 +2188,8 @@
 			one->is_binary = one->driver->binary;
 		else {
 			if (!one->data && DIFF_FILE_VALID(one))
-				diff_populate_filespec(one, 0);
-			if (one->data)
+				diff_populate_filespec(one, CHECK_BINARY);
+			if (one->is_binary == -1 && one->data)
 				one->is_binary = buffer_is_binary(one->data,
 						one->size);
 			if (one->is_binary == -1)
@@ -2324,6 +2324,19 @@
 	} else if (!DIFF_OPT_TST(o, TEXT) &&
 	    ( (!textconv_one && diff_filespec_is_binary(one)) ||
 	      (!textconv_two && diff_filespec_is_binary(two)) )) {
+		if (!one->data && !two->data &&
+		    S_ISREG(one->mode) && S_ISREG(two->mode) &&
+		    !DIFF_OPT_TST(o, BINARY)) {
+			if (!hashcmp(one->sha1, two->sha1)) {
+				if (must_show_header)
+					fprintf(o->file, "%s", header.buf);
+				goto free_ab_and_return;
+			}
+			fprintf(o->file, "%s", header.buf);
+			fprintf(o->file, "%sBinary files %s and %s differ\n",
+				line_prefix, lbl[0], lbl[1]);
+			goto free_ab_and_return;
+		}
 		if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
 			die("unable to read files to diff");
 		/* Quite common confusing case */
@@ -2668,8 +2681,9 @@
  * grab the data for the blob (or file) for our own in-core comparison.
  * diff_filespec has data and size fields for this purpose.
  */
-int diff_populate_filespec(struct diff_filespec *s, int size_only)
+int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
 {
+	int size_only = flags & CHECK_SIZE_ONLY;
 	int err = 0;
 	/*
 	 * demote FAIL to WARN to allow inspecting the situation
@@ -2724,6 +2738,11 @@
 		}
 		if (size_only)
 			return 0;
+		if ((flags & CHECK_BINARY) &&
+		    s->size > big_file_threshold && s->is_binary == -1) {
+			s->is_binary = 1;
+			return 0;
+		}
 		fd = open(s->path, O_RDONLY);
 		if (fd < 0)
 			goto err_empty;
@@ -2745,16 +2764,21 @@
 	}
 	else {
 		enum object_type type;
-		if (size_only) {
+		if (size_only || (flags & CHECK_BINARY)) {
 			type = sha1_object_info(s->sha1, &s->size);
 			if (type < 0)
 				die("unable to read %s", sha1_to_hex(s->sha1));
-		} else {
-			s->data = read_sha1_file(s->sha1, &type, &s->size);
-			if (!s->data)
-				die("unable to read %s", sha1_to_hex(s->sha1));
-			s->should_free = 1;
+			if (size_only)
+				return 0;
+			if (s->size > big_file_threshold && s->is_binary == -1) {
+				s->is_binary = 1;
+				return 0;
+			}
 		}
+		s->data = read_sha1_file(s->sha1, &type, &s->size);
+		if (!s->data)
+			die("unable to read %s", sha1_to_hex(s->sha1));
+		s->should_free = 1;
 	}
 	return 0;
 }
@@ -4688,8 +4712,8 @@
 	    !DIFF_FILE_VALID(p->two) ||
 	    (p->one->sha1_valid && p->two->sha1_valid) ||
 	    (p->one->mode != p->two->mode) ||
-	    diff_populate_filespec(p->one, 1) ||
-	    diff_populate_filespec(p->two, 1) ||
+	    diff_populate_filespec(p->one, CHECK_SIZE_ONLY) ||
+	    diff_populate_filespec(p->two, CHECK_SIZE_ONLY) ||
 	    (p->one->size != p->two->size) ||
 	    !diff_filespec_is_identical(p->one, p->two)) /* (2) */
 		p->skip_stat_unmatch_result = 1;
@@ -4931,7 +4955,7 @@
 	struct diff_tempfile *temp;
 	const char *argv[3];
 	const char **arg = argv;
-	struct child_process child;
+	struct child_process child = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
 	int err = 0;
 
@@ -4940,7 +4964,6 @@
 	*arg++ = temp->name;
 	*arg = NULL;
 
-	memset(&child, 0, sizeof(child));
 	child.use_shell = 1;
 	child.argv = argv;
 	child.out = -1;
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 2e44a37..4e132f1 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -147,9 +147,11 @@
 	 * is a possible size - we really should have a flag to
 	 * say whether the size is valid or not!)
 	 */
-	if (!src->cnt_data && diff_populate_filespec(src, 1))
+	if (!src->cnt_data &&
+	    diff_populate_filespec(src, CHECK_SIZE_ONLY))
 		return 0;
-	if (!dst->cnt_data && diff_populate_filespec(dst, 1))
+	if (!dst->cnt_data &&
+	    diff_populate_filespec(dst, CHECK_SIZE_ONLY))
 		return 0;
 
 	max_size = ((src->size > dst->size) ? src->size : dst->size);
diff --git a/diffcore.h b/diffcore.h
index c876dac..33ea2de 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -55,7 +55,9 @@
 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
 			  int, unsigned short);
 
-extern int diff_populate_filespec(struct diff_filespec *, int);
+#define CHECK_SIZE_ONLY 1
+#define CHECK_BINARY    2
+extern int diff_populate_filespec(struct diff_filespec *, unsigned int);
 extern void diff_free_filespec_data(struct diff_filespec *);
 extern void diff_free_filespec_blob(struct diff_filespec *);
 extern int diff_filespec_is_binary(struct diff_filespec *);
diff --git a/dir.c b/dir.c
index fcb6872..bd274a7 100644
--- a/dir.c
+++ b/dir.c
@@ -1507,12 +1507,16 @@
 
 int is_inside_dir(const char *dir)
 {
-	char cwd[PATH_MAX];
+	char *cwd;
+	int rc;
+
 	if (!dir)
 		return 0;
-	if (!getcwd(cwd, sizeof(cwd)))
-		die_errno("can't find the current directory");
-	return dir_inside_of(cwd, dir) >= 0;
+
+	cwd = xgetcwd();
+	rc = (dir_inside_of(cwd, dir) >= 0);
+	free(cwd);
+	return rc;
 }
 
 int is_empty_dir(const char *path)
diff --git a/editor.c b/editor.c
index 0abbd8d..01c644c 100644
--- a/editor.c
+++ b/editor.c
@@ -38,10 +38,9 @@
 
 	if (strcmp(editor, ":")) {
 		const char *args[] = { editor, real_path(path), NULL };
-		struct child_process p;
+		struct child_process p = CHILD_PROCESS_INIT;
 		int ret, sig;
 
-		memset(&p, 0, sizeof(p));
 		p.argv = args;
 		p.env = env;
 		p.use_shell = 1;
diff --git a/exec_cmd.c b/exec_cmd.c
index 125fa6f..698e752 100644
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -86,11 +86,7 @@
 static void add_path(struct strbuf *out, const char *path)
 {
 	if (path && *path) {
-		if (is_absolute_path(path))
-			strbuf_addstr(out, path);
-		else
-			strbuf_addstr(out, absolute_path(path));
-
+		strbuf_add_absolute_path(out, path);
 		strbuf_addch(out, PATH_SEP);
 	}
 }
diff --git a/fast-import.c b/fast-import.c
index d73f58c..487f1f8 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -946,10 +946,12 @@
 
 static void end_packfile(void)
 {
-	struct packed_git *old_p = pack_data, *new_p;
+	if (!pack_data)
+		return;
 
 	clear_delta_base_cache();
 	if (object_count) {
+		struct packed_git *new_p;
 		unsigned char cur_pack_sha1[20];
 		char *idx_name;
 		int i;
@@ -991,10 +993,11 @@
 		pack_id++;
 	}
 	else {
-		close(old_p->pack_fd);
-		unlink_or_warn(old_p->pack_name);
+		close(pack_data->pack_fd);
+		unlink_or_warn(pack_data->pack_name);
 	}
-	free(old_p);
+	free(pack_data);
+	pack_data = NULL;
 
 	/* We can't carry a delta across packfiles. */
 	strbuf_release(&last_blob.data);
@@ -1419,7 +1422,7 @@
 
 static void store_tree(struct tree_entry *root)
 {
-	struct tree_content *t = root->tree;
+	struct tree_content *t;
 	unsigned int i, j, del;
 	struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 };
 	struct object_entry *le = NULL;
@@ -1427,6 +1430,10 @@
 	if (!is_null_sha1(root->versions[1].sha1))
 		return;
 
+	if (!root->tree)
+		load_tree(root);
+	t = root->tree;
+
 	for (i = 0; i < t->entry_count; i++) {
 		if (t->entries[i]->tree)
 			store_tree(t->entries[i]);
@@ -1679,8 +1686,9 @@
 static int update_branch(struct branch *b)
 {
 	static const char *msg = "fast-import";
-	struct ref_lock *lock;
+	struct ref_transaction *transaction;
 	unsigned char old_sha1[20];
+	struct strbuf err = STRBUF_INIT;
 
 	if (read_ref(b->name, old_sha1))
 		hashclr(old_sha1);
@@ -1689,29 +1697,33 @@
 			delete_ref(b->name, old_sha1, 0);
 		return 0;
 	}
-	lock = lock_any_ref_for_update(b->name, old_sha1, 0, NULL);
-	if (!lock)
-		return error("Unable to lock %s", b->name);
 	if (!force_update && !is_null_sha1(old_sha1)) {
 		struct commit *old_cmit, *new_cmit;
 
 		old_cmit = lookup_commit_reference_gently(old_sha1, 0);
 		new_cmit = lookup_commit_reference_gently(b->sha1, 0);
-		if (!old_cmit || !new_cmit) {
-			unlock_ref(lock);
+		if (!old_cmit || !new_cmit)
 			return error("Branch %s is missing commits.", b->name);
-		}
 
 		if (!in_merge_bases(old_cmit, new_cmit)) {
-			unlock_ref(lock);
 			warning("Not updating %s"
 				" (new tip %s does not contain %s)",
 				b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
 			return -1;
 		}
 	}
-	if (write_ref_sha1(lock, b->sha1, msg) < 0)
-		return error("Unable to update %s", b->name);
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, b->name, b->sha1, old_sha1,
+				   0, 1, &err) ||
+	    ref_transaction_commit(transaction, msg, &err)) {
+		ref_transaction_free(transaction);
+		error("%s", err.buf);
+		strbuf_release(&err);
+		return -1;
+	}
+	ref_transaction_free(transaction);
+	strbuf_release(&err);
 	return 0;
 }
 
@@ -1730,15 +1742,32 @@
 {
 	static const char *msg = "fast-import";
 	struct tag *t;
-	struct ref_lock *lock;
-	char ref_name[PATH_MAX];
+	struct strbuf ref_name = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
+	struct ref_transaction *transaction;
 
-	for (t = first_tag; t; t = t->next_tag) {
-		sprintf(ref_name, "tags/%s", t->name);
-		lock = lock_ref_sha1(ref_name, NULL);
-		if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
-			failure |= error("Unable to update %s", ref_name);
+	transaction = ref_transaction_begin(&err);
+	if (!transaction) {
+		failure |= error("%s", err.buf);
+		goto cleanup;
 	}
+	for (t = first_tag; t; t = t->next_tag) {
+		strbuf_reset(&ref_name);
+		strbuf_addf(&ref_name, "refs/tags/%s", t->name);
+
+		if (ref_transaction_update(transaction, ref_name.buf, t->sha1,
+					   NULL, 0, 0, &err)) {
+			failure |= error("%s", err.buf);
+			goto cleanup;
+		}
+	}
+	if (ref_transaction_commit(transaction, msg, &err))
+		failure |= error("%s", err.buf);
+
+ cleanup:
+	ref_transaction_free(transaction);
+	strbuf_release(&ref_name);
+	strbuf_release(&err);
 }
 
 static void dump_marks_helper(FILE *f,
@@ -1971,7 +2000,7 @@
 	return 1;
 }
 
-static int validate_raw_date(const char *src, char *result, int maxlen)
+static int validate_raw_date(const char *src, struct strbuf *result)
 {
 	const char *orig_src = src;
 	char *endp;
@@ -1989,11 +2018,10 @@
 		return -1;
 
 	num = strtoul(src + 1, &endp, 10);
-	if (errno || endp == src + 1 || *endp || (endp - orig_src) >= maxlen ||
-	    1400 < num)
+	if (errno || endp == src + 1 || *endp || 1400 < num)
 		return -1;
 
-	strcpy(result, orig_src);
+	strbuf_addstr(result, orig_src);
 	return 0;
 }
 
@@ -2001,7 +2029,7 @@
 {
 	const char *ltgt;
 	size_t name_len;
-	char *ident;
+	struct strbuf ident = STRBUF_INIT;
 
 	/* ensure there is a space delimiter even if there is no name */
 	if (*buf == '<')
@@ -2020,26 +2048,25 @@
 		die("Missing space after > in ident string: %s", buf);
 	ltgt++;
 	name_len = ltgt - buf;
-	ident = xmalloc(name_len + 24);
-	strncpy(ident, buf, name_len);
+	strbuf_add(&ident, buf, name_len);
 
 	switch (whenspec) {
 	case WHENSPEC_RAW:
-		if (validate_raw_date(ltgt, ident + name_len, 24) < 0)
+		if (validate_raw_date(ltgt, &ident) < 0)
 			die("Invalid raw date \"%s\" in ident: %s", ltgt, buf);
 		break;
 	case WHENSPEC_RFC2822:
-		if (parse_date(ltgt, ident + name_len, 24) < 0)
+		if (parse_date(ltgt, &ident) < 0)
 			die("Invalid rfc2822 date \"%s\" in ident: %s", ltgt, buf);
 		break;
 	case WHENSPEC_NOW:
 		if (strcmp("now", ltgt))
 			die("Date in ident must be 'now': %s", buf);
-		datestamp(ident + name_len, 24);
+		datestamp(&ident);
 		break;
 	}
 
-	return ident;
+	return strbuf_detach(&ident, NULL);
 }
 
 static void parse_and_store_blob(
@@ -3274,36 +3301,34 @@
 	die("This version of fast-import does not support option: %s", option);
 }
 
-static int git_pack_config(const char *k, const char *v, void *cb)
+static void git_pack_config(void)
 {
-	if (!strcmp(k, "pack.depth")) {
-		max_depth = git_config_int(k, v);
+	int indexversion_value;
+	unsigned long packsizelimit_value;
+
+	if (!git_config_get_ulong("pack.depth", &max_depth)) {
 		if (max_depth > MAX_DEPTH)
 			max_depth = MAX_DEPTH;
-		return 0;
 	}
-	if (!strcmp(k, "pack.compression")) {
-		int level = git_config_int(k, v);
-		if (level == -1)
-			level = Z_DEFAULT_COMPRESSION;
-		else if (level < 0 || level > Z_BEST_COMPRESSION)
-			die("bad pack compression level %d", level);
-		pack_compression_level = level;
+	if (!git_config_get_int("pack.compression", &pack_compression_level)) {
+		if (pack_compression_level == -1)
+			pack_compression_level = Z_DEFAULT_COMPRESSION;
+		else if (pack_compression_level < 0 ||
+			 pack_compression_level > Z_BEST_COMPRESSION)
+			git_die_config("pack.compression",
+					"bad pack compression level %d", pack_compression_level);
 		pack_compression_seen = 1;
-		return 0;
 	}
-	if (!strcmp(k, "pack.indexversion")) {
-		pack_idx_opts.version = git_config_int(k, v);
+	if (!git_config_get_int("pack.indexversion", &indexversion_value)) {
+		pack_idx_opts.version = indexversion_value;
 		if (pack_idx_opts.version > 2)
-			die("bad pack.indexversion=%"PRIu32,
-			    pack_idx_opts.version);
-		return 0;
+			git_die_config("pack.indexversion",
+					"bad pack.indexversion=%"PRIu32, pack_idx_opts.version);
 	}
-	if (!strcmp(k, "pack.packsizelimit")) {
-		max_packsize = git_config_ulong(k, v);
-		return 0;
-	}
-	return git_default_config(k, v, cb);
+	if (!git_config_get_ulong("pack.packsizelimit", &packsizelimit_value))
+		max_packsize = packsizelimit_value;
+
+	git_config(git_default_config, NULL);
 }
 
 static const char fast_import_usage[] =
@@ -3356,7 +3381,7 @@
 
 	setup_git_directory();
 	reset_pack_idx_option(&pack_idx_opts);
-	git_config(git_pack_config, NULL);
+	git_pack_config();
 	if (!pack_compression_seen && core_compression_seen)
 		pack_compression_level = core_compression_level;
 
diff --git a/fetch-pack.c b/fetch-pack.c
index b8a58fa..7487aa7 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -666,7 +666,7 @@
 	char hdr_arg[256];
 	const char **av, *cmd_name;
 	int do_keep = args->keep_pack;
-	struct child_process cmd;
+	struct child_process cmd = CHILD_PROCESS_INIT;
 	int ret;
 
 	memset(&demux, 0, sizeof(demux));
@@ -685,7 +685,6 @@
 	else
 		demux.out = xd[0];
 
-	memset(&cmd, 0, sizeof(cmd));
 	cmd.argv = argv;
 	av = argv;
 	*hdr_arg = 0;
@@ -869,34 +868,15 @@
 	return ref;
 }
 
-static int fetch_pack_config(const char *var, const char *value, void *cb)
+static void fetch_pack_config(void)
 {
-	if (strcmp(var, "fetch.unpacklimit") == 0) {
-		fetch_unpack_limit = git_config_int(var, value);
-		return 0;
-	}
+	git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
+	git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
+	git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
+	git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
+	git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
 
-	if (strcmp(var, "transfer.unpacklimit") == 0) {
-		transfer_unpack_limit = git_config_int(var, value);
-		return 0;
-	}
-
-	if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
-		prefer_ofs_delta = git_config_bool(var, value);
-		return 0;
-	}
-
-	if (!strcmp(var, "fetch.fsckobjects")) {
-		fetch_fsck_objects = git_config_bool(var, value);
-		return 0;
-	}
-
-	if (!strcmp(var, "transfer.fsckobjects")) {
-		transfer_fsck_objects = git_config_bool(var, value);
-		return 0;
-	}
-
-	return git_default_config(var, value, cb);
+	git_config(git_default_config, NULL);
 }
 
 static void fetch_pack_setup(void)
@@ -904,7 +884,7 @@
 	static int did_setup;
 	if (did_setup)
 		return;
-	git_config(fetch_pack_config, NULL);
+	fetch_pack_config();
 	if (0 <= transfer_unpack_limit)
 		unpack_limit = transfer_unpack_limit;
 	else if (0 <= fetch_unpack_limit)
diff --git a/git-bisect.sh b/git-bisect.sh
index 1e0d602..6cda2b5 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -286,11 +286,11 @@
 
 		if test -s "$GIT_DIR/BISECT_START"
 		then
-			gettextln "You need to give me at least one good and one bad revisions.
+			gettextln "You need to give me at least one good and one bad revision.
 (You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
 		else
 			gettextln "You need to start by \"git bisect start\".
-You then need to give me at least one good and one bad revisions.
+You then need to give me at least one good and one bad revision.
 (You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
 		fi
 		exit 1 ;;
diff --git a/git-compat-util.h b/git-compat-util.h
index f587749..4e7e3f8 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -264,19 +264,35 @@
 #endif
 
 #ifndef has_dos_drive_prefix
-#define has_dos_drive_prefix(path) 0
-#endif
-
-#ifndef offset_1st_component
-#define offset_1st_component(path) (is_dir_sep((path)[0]))
+static inline int git_has_dos_drive_prefix(const char *path)
+{
+	return 0;
+}
+#define has_dos_drive_prefix git_has_dos_drive_prefix
 #endif
 
 #ifndef is_dir_sep
-#define is_dir_sep(c) ((c) == '/')
+static inline int git_is_dir_sep(int c)
+{
+	return c == '/';
+}
+#define is_dir_sep git_is_dir_sep
+#endif
+
+#ifndef offset_1st_component
+static inline int git_offset_1st_component(const char *path)
+{
+	return is_dir_sep(path[0]);
+}
+#define offset_1st_component git_offset_1st_component
 #endif
 
 #ifndef find_last_dir_sep
-#define find_last_dir_sep(path) strrchr(path, '/')
+static inline char *git_find_last_dir_sep(const char *path)
+{
+	return strrchr(path, '/');
+}
+#define find_last_dir_sep git_find_last_dir_sep
 #endif
 
 #if defined(__HP_cc) && (__HP_cc >= 61000)
@@ -593,6 +609,7 @@
 extern char *xstrdup(const char *str);
 extern void *xmalloc(size_t size);
 extern void *xmallocz(size_t size);
+extern void *xmallocz_gently(size_t size);
 extern void *xmemdupz(const void *data, size_t len);
 extern char *xstrndup(const char *str, size_t len);
 extern void *xrealloc(void *ptr, size_t size);
@@ -607,6 +624,7 @@
 extern int xmkstemp_mode(char *template, int mode);
 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
+extern char *xgetcwd(void);
 
 static inline size_t xsize_t(off_t len)
 {
diff --git a/git-pull.sh b/git-pull.sh
index 18a394f..4d4fc77 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -20,7 +20,7 @@
     if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
 	die "$(gettext "Pull is not possible because you have unmerged files.
 Please, fix them up in the work tree, and then use 'git add/rm <file>'
-as appropriate to mark resolution, or use 'git commit -a'.")"
+as appropriate to mark resolution and make a commit.")"
     else
 	die "$(gettext "Pull is not possible because you have unmerged files.")"
     fi
diff --git a/git-stash.sh b/git-stash.sh
index bcc757b..0158c73 100755
--- a/git-stash.sh
+++ b/git-stash.sh
@@ -297,7 +297,7 @@
 
 list_stash () {
 	have_stash || return 0
-	git log --format="%gd: %gs" -g "$@" $ref_stash --
+	git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
 }
 
 show_stash () {
@@ -394,7 +394,7 @@
 
 	REV=$(git rev-parse --quiet --symbolic --verify "$1" 2>/dev/null) || {
 		reference="$1"
-		die "$(eval_gettext "\$reference is not valid reference")"
+		die "$(eval_gettext "\$reference is not a valid reference")"
 	}
 
 	i_commit=$(git rev-parse --quiet --verify "$REV^2" 2>/dev/null) &&
diff --git a/git-svn.perl b/git-svn.perl
index 0a32372..b6e2186 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -260,8 +260,8 @@
 			} ],
 	'find-rev' => [ \&cmd_find_rev,
 	                "Translate between SVN revision numbers and tree-ish",
-			{ 'before' => \$_before,
-			  'after' => \$_after } ],
+			{ 'B|before' => \$_before,
+			  'A|after' => \$_after } ],
 	'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
 			{ 'merge|m|M' => \$_merge,
 			  'verbose|v' => \$_verbose,
@@ -306,13 +306,16 @@
 }
 package main;
 
-my $term = eval {
-	$ENV{"GIT_SVN_NOTTY"}
-		? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
-		: new Term::ReadLine 'git-svn';
-};
-if ($@) {
-	$term = new FakeTerm "$@: going non-interactive";
+my $term;
+sub term_init {
+	$term = eval {
+		$ENV{"GIT_SVN_NOTTY"}
+			? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
+			: new Term::ReadLine 'git-svn';
+	};
+	if ($@) {
+		$term = new FakeTerm "$@: going non-interactive";
+	}
 }
 
 my $cmd;
@@ -424,6 +427,7 @@
 	my $default = $arg{default};
 	my $resp;
 	my $i = 0;
+	term_init() unless $term;
 
 	if ( !( defined($term->IN)
             && defined( fileno($term->IN) )
@@ -1161,7 +1165,9 @@
 	::_req_svn();
 
 	my $ctx = SVN::Client->new(
-		auth    => Git::SVN::Ra::_auth_providers(),
+		config => SVN::Core::config_get_config(
+			$Git::SVN::Ra::config_dir
+		),
 		log_msg => sub {
 			${ $_[0] } = defined $_message
 				? $_message
@@ -1475,10 +1481,37 @@
 	}
 }
 
-
 sub cmd_info {
-	my $path = canonicalize_path(defined($_[0]) ? $_[0] : ".");
-	my $fullpath = canonicalize_path($cmd_dir_prefix . $path);
+	my $path_arg = defined($_[0]) ? $_[0] : '.';
+	my $path = $path_arg;
+	if (File::Spec->file_name_is_absolute($path)) {
+		$path = canonicalize_path($path);
+
+		my $toplevel = eval {
+			my @cmd = qw/rev-parse --show-toplevel/;
+			command_oneline(\@cmd, STDERR => 0);
+		};
+
+		# remove $toplevel from the absolute path:
+		my ($vol, $dirs, $file) = File::Spec->splitpath($path);
+		my (undef, $tdirs, $tfile) = File::Spec->splitpath($toplevel);
+		my @dirs = File::Spec->splitdir($dirs);
+		my @tdirs = File::Spec->splitdir($tdirs);
+		pop @dirs if $dirs[-1] eq '';
+		pop @tdirs if $tdirs[-1] eq '';
+		push @dirs, $file;
+		push @tdirs, $tfile;
+		while (@tdirs && @dirs && $tdirs[0] eq $dirs[0]) {
+			shift @dirs;
+			shift @tdirs;
+		}
+		$dirs = File::Spec->catdir(@dirs);
+		$path = File::Spec->catpath($vol, $dirs);
+
+		$path = canonicalize_path($path);
+	} else {
+		$path = canonicalize_path($cmd_dir_prefix . $path);
+	}
 	if (exists $_[1]) {
 		die "Too many arguments specified\n";
 	}
@@ -1499,14 +1532,14 @@
 	# canonicalize_path() will return "" to make libsvn 1.5.x happy,
 	$path = "." if $path eq "";
 
-	my $full_url = canonicalize_url( add_path_to_url( $url, $fullpath ) );
+	my $full_url = canonicalize_url( add_path_to_url( $url, $path ) );
 
 	if ($_url) {
 		print "$full_url\n";
 		return;
 	}
 
-	my $result = "Path: $path\n";
+	my $result = "Path: $path_arg\n";
 	$result .= "Name: " . basename($path) . "\n" if $file_type ne "dir";
 	$result .= "URL: $full_url\n";
 
@@ -1537,7 +1570,7 @@
 	}
 
 	my ($lc_author, $lc_rev, $lc_date_utc);
-	my @args = Git::SVN::Log::git_svn_log_cmd($rev, $rev, "--", $fullpath);
+	my @args = Git::SVN::Log::git_svn_log_cmd($rev, $rev, "--", $path);
 	my $log = command_output_pipe(@args);
 	my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
 	while (<$log>) {
diff --git a/git.c b/git.c
index 9c49519..523768d 100644
--- a/git.c
+++ b/git.c
@@ -14,13 +14,13 @@
 	"           <command> [<args>]";
 
 const char git_more_info_string[] =
-	N_("'git help -a' and 'git help -g' lists available subcommands and some\n"
+	N_("'git help -a' and 'git help -g' list available subcommands and some\n"
 	   "concept guides. See 'git help <command>' or 'git help <concept>'\n"
 	   "to read about a specific subcommand or concept.");
 
 static struct startup_info git_startup_info;
 static int use_pager = -1;
-static char orig_cwd[PATH_MAX];
+static char *orig_cwd;
 static const char *env_names[] = {
 	GIT_DIR_ENVIRONMENT,
 	GIT_WORK_TREE_ENVIRONMENT,
@@ -36,8 +36,7 @@
 	if (saved_environment)
 		return;
 	saved_environment = 1;
-	if (!getcwd(orig_cwd, sizeof(orig_cwd)))
-		die_errno("cannot getcwd");
+	orig_cwd = xgetcwd();
 	for (i = 0; i < ARRAY_SIZE(env_names); i++) {
 		orig_env[i] = getenv(env_names[i]);
 		if (orig_env[i])
@@ -48,8 +47,9 @@
 static void restore_env(void)
 {
 	int i;
-	if (*orig_cwd && chdir(orig_cwd))
+	if (orig_cwd && chdir(orig_cwd))
 		die_errno("could not move to %s", orig_cwd);
+	free(orig_cwd);
 	for (i = 0; i < ARRAY_SIZE(env_names); i++) {
 		if (orig_env[i])
 			setenv(env_names[i], orig_env[i], 1);
@@ -161,9 +161,10 @@
 			if (envchanged)
 				*envchanged = 1;
 		} else if (!strcmp(cmd, "--bare")) {
-			static char git_dir[PATH_MAX+1];
+			char *cwd = xgetcwd();
 			is_bare_repository_cfg = 1;
-			setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
+			setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
+			free(cwd);
 			setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
 			if (envchanged)
 				*envchanged = 1;
diff --git a/gpg-interface.c b/gpg-interface.c
index ff07012..1ef73fb 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -55,12 +55,11 @@
  */
 int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *signing_key)
 {
-	struct child_process gpg;
+	struct child_process gpg = CHILD_PROCESS_INIT;
 	const char *args[4];
 	ssize_t len;
 	size_t i, j, bottom;
 
-	memset(&gpg, 0, sizeof(gpg));
 	gpg.argv = args;
 	gpg.in = -1;
 	gpg.out = -1;
@@ -116,7 +115,7 @@
 			 const char *signature, size_t signature_size,
 			 struct strbuf *gpg_output, struct strbuf *gpg_status)
 {
-	struct child_process gpg;
+	struct child_process gpg = CHILD_PROCESS_INIT;
 	const char *args_gpg[] = {NULL, "--status-fd=1", "--verify", "FILE", "-", NULL};
 	char path[PATH_MAX];
 	int fd, ret;
@@ -133,7 +132,6 @@
 			     path, strerror(errno));
 	close(fd);
 
-	memset(&gpg, 0, sizeof(gpg));
 	gpg.argv = args_gpg;
 	gpg.in = -1;
 	gpg.out = -1;
diff --git a/http-backend.c b/http-backend.c
index 80790bb..404e682 100644
--- a/http-backend.c
+++ b/http-backend.c
@@ -219,29 +219,22 @@
 	send_local_file("application/x-git-packed-objects-toc", name);
 }
 
-static int http_config(const char *var, const char *value, void *cb)
+static void http_config(void)
 {
-	const char *p;
+	int i, value = 0;
+	struct strbuf var = STRBUF_INIT;
 
-	if (!strcmp(var, "http.getanyfile")) {
-		getanyfile = git_config_bool(var, value);
-		return 0;
+	git_config_get_bool("http.getanyfile", &getanyfile);
+
+	for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
+		struct rpc_service *svc = &rpc_service[i];
+		strbuf_addf(&var, "http.%s", svc->config_name);
+		if (!git_config_get_bool(var.buf, &value))
+			svc->enabled = value;
+		strbuf_reset(&var);
 	}
 
-	if (skip_prefix(var, "http.", &p)) {
-		int i;
-
-		for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
-			struct rpc_service *svc = &rpc_service[i];
-			if (!strcmp(p, svc->config_name)) {
-				svc->enabled = git_config_bool(var, value);
-				return 0;
-			}
-		}
-	}
-
-	/* we are not interested in parsing any other configuration here */
-	return 0;
+	strbuf_release(&var);
 }
 
 static struct rpc_service *select_service(const char *name)
@@ -323,7 +316,7 @@
 	const char *host = getenv("REMOTE_ADDR");
 	struct argv_array env = ARGV_ARRAY_INIT;
 	int gzipped_request = 0;
-	struct child_process cld;
+	struct child_process cld = CHILD_PROCESS_INIT;
 
 	if (encoding && !strcmp(encoding, "gzip"))
 		gzipped_request = 1;
@@ -341,7 +334,6 @@
 		argv_array_pushf(&env, "GIT_COMMITTER_EMAIL=%s@http.%s",
 				 user, host);
 
-	memset(&cld, 0, sizeof(cld));
 	cld.argv = argv;
 	cld.env = env.argv;
 	if (gzipped_request)
@@ -627,7 +619,7 @@
 	    access("git-daemon-export-ok", F_OK) )
 		not_found("Repository not exported: '%s'", dir);
 
-	git_config(http_config, NULL);
+	http_config();
 	cmd->imp(cmd_arg);
 	return 0;
 }
diff --git a/http-walker.c b/http-walker.c
index dbddfaa..88da546 100644
--- a/http-walker.c
+++ b/http-walker.c
@@ -230,7 +230,6 @@
 			int okay = 0;
 			int serverlen = 0;
 			struct alt_base *newalt;
-			char *target = NULL;
 			if (data[i] == '/') {
 				/*
 				 * This counts
@@ -287,17 +286,15 @@
 			}
 			/* skip "objects\n" at end */
 			if (okay) {
-				target = xmalloc(serverlen + posn - i - 6);
-				memcpy(target, base, serverlen);
-				memcpy(target + serverlen, data + i,
-				       posn - i - 7);
-				target[serverlen + posn - i - 7] = 0;
+				struct strbuf target = STRBUF_INIT;
+				strbuf_add(&target, base, serverlen);
+				strbuf_add(&target, data + i, posn - i - 7);
 				if (walker->get_verbosely)
-					fprintf(stderr,
-						"Also look at %s\n", target);
+					fprintf(stderr, "Also look at %s\n",
+						target.buf);
 				newalt = xmalloc(sizeof(*newalt));
 				newalt->next = NULL;
-				newalt->base = target;
+				newalt->base = strbuf_detach(&target, NULL);
 				newalt->got_indices = 0;
 				newalt->packs = NULL;
 
diff --git a/http.c b/http.c
index c8cd50d..0adcec4 100644
--- a/http.c
+++ b/http.c
@@ -300,6 +300,9 @@
 {
 	CURL *result = curl_easy_init();
 
+	if (!result)
+		die("curl_easy_init failed");
+
 	if (!curl_ssl_verify) {
 		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
@@ -399,7 +402,8 @@
 	git_config(urlmatch_config_entry, &config);
 	free(normalized_url);
 
-	curl_global_init(CURL_GLOBAL_ALL);
+	if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
+		die("curl_global_init failed");
 
 	http_proactive_auth = proactive_auth;
 
@@ -417,10 +421,8 @@
 	}
 
 	curlm = curl_multi_init();
-	if (curlm == NULL) {
-		fprintf(stderr, "Error creating curl multi handle.\n");
-		exit(1);
-	}
+	if (!curlm)
+		die("curl_multi_init failed");
 #endif
 
 	if (getenv("GIT_SSL_NO_VERIFY"))
@@ -1332,7 +1334,7 @@
 	struct packed_git **lst;
 	struct packed_git *p = preq->target;
 	char *tmp_idx;
-	struct child_process ip;
+	struct child_process ip = CHILD_PROCESS_INIT;
 	const char *ip_argv[8];
 
 	close_pack_index(p);
@@ -1355,7 +1357,6 @@
 	ip_argv[3] = preq->tmpfile;
 	ip_argv[4] = NULL;
 
-	memset(&ip, 0, sizeof(ip));
 	ip.argv = ip_argv;
 	ip.git_cmd = 1;
 	ip.no_stdin = 1;
diff --git a/ident.c b/ident.c
index 1d9b6e7..5ff1aad 100644
--- a/ident.c
+++ b/ident.c
@@ -9,7 +9,7 @@
 
 static struct strbuf git_default_name = STRBUF_INIT;
 static struct strbuf git_default_email = STRBUF_INIT;
-static char git_default_date[50];
+static struct strbuf git_default_date = STRBUF_INIT;
 
 #define IDENT_NAME_GIVEN 01
 #define IDENT_MAIL_GIVEN 02
@@ -102,7 +102,7 @@
 	add_domainname(email);
 }
 
-static const char *ident_default_name(void)
+const char *ident_default_name(void)
 {
 	if (!git_default_name.len) {
 		copy_gecos(xgetpwuid_self(), &git_default_name);
@@ -129,9 +129,9 @@
 
 static const char *ident_default_date(void)
 {
-	if (!git_default_date[0])
-		datestamp(git_default_date, sizeof(git_default_date));
-	return git_default_date;
+	if (!git_default_date.len)
+		datestamp(&git_default_date);
+	return git_default_date.buf;
 }
 
 static int crud(unsigned char c)
@@ -292,7 +292,6 @@
 		      const char *date_str, int flag)
 {
 	static struct strbuf ident = STRBUF_INIT;
-	char date[50];
 	int strict = (flag & IDENT_STRICT);
 	int want_date = !(flag & IDENT_NO_DATE);
 	int want_name = !(flag & IDENT_NO_NAME);
@@ -320,15 +319,6 @@
 		die("unable to auto-detect email address (got '%s')", email);
 	}
 
-	if (want_date) {
-		if (date_str && date_str[0]) {
-			if (parse_date(date_str, date, sizeof(date)) < 0)
-				die("invalid date format: %s", date_str);
-		}
-		else
-			strcpy(date, ident_default_date());
-	}
-
 	strbuf_reset(&ident);
 	if (want_name) {
 		strbuf_addstr_without_crud(&ident, name);
@@ -339,8 +329,14 @@
 			strbuf_addch(&ident, '>');
 	if (want_date) {
 		strbuf_addch(&ident, ' ');
-		strbuf_addstr_without_crud(&ident, date);
+		if (date_str && date_str[0]) {
+			if (parse_date(date_str, &ident) < 0)
+				die("invalid date format: %s", date_str);
+		}
+		else
+			strbuf_addstr(&ident, ident_default_date());
 	}
+
 	return ident.buf;
 }
 
diff --git a/imap-send.c b/imap-send.c
index 02eb3e0..70bcc7a 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -69,6 +69,7 @@
 	char *tunnel;
 	char *host;
 	int port;
+	char *folder;
 	char *user;
 	char *pass;
 	int use_ssl;
@@ -82,6 +83,7 @@
 	NULL,	/* tunnel */
 	NULL,	/* host */
 	0,	/* port */
+	NULL,	/* folder */
 	NULL,	/* user */
 	NULL,	/* pass */
 	0,   	/* use_ssl */
@@ -128,7 +130,6 @@
 	char *data;
 	int dlen;
 	int uid;
-	unsigned create:1, trycreate:1;
 };
 
 struct imap_cmd {
@@ -493,9 +494,9 @@
 	return ret;
 }
 
-static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
-					 struct imap_cmd_cb *cb,
-					 const char *fmt, va_list ap)
+static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
+				       struct imap_cmd_cb *cb,
+				       const char *fmt, va_list ap)
 {
 	struct imap *imap = ctx->imap;
 	struct imap_cmd *cmd;
@@ -524,7 +525,7 @@
 	if (Verbose) {
 		if (imap->num_in_progress)
 			printf("(%d in progress) ", imap->num_in_progress);
-		if (memcmp(cmd->cmd, "LOGIN", 5))
+		if (!starts_with(cmd->cmd, "LOGIN"))
 			printf(">>> %s", buf);
 		else
 			printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
@@ -559,20 +560,6 @@
 }
 
 __attribute__((format (printf, 3, 4)))
-static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
-				       struct imap_cmd_cb *cb,
-				       const char *fmt, ...)
-{
-	struct imap_cmd *ret;
-	va_list ap;
-
-	va_start(ap, fmt);
-	ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
-	va_end(ap);
-	return ret;
-}
-
-__attribute__((format (printf, 3, 4)))
 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 		     const char *fmt, ...)
 {
@@ -580,7 +567,7 @@
 	struct imap_cmd *cmdp;
 
 	va_start(ap, fmt);
-	cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
+	cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
 	va_end(ap);
 	if (!cmdp)
 		return RESP_BAD;
@@ -596,7 +583,7 @@
 	struct imap_cmd *cmdp;
 
 	va_start(ap, fmt);
-	cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
+	cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
 	va_end(ap);
 	if (!cmdp)
 		return DRV_STORE_BAD;
@@ -714,8 +701,8 @@
 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 {
 	struct imap *imap = ctx->imap;
-	struct imap_cmd *cmdp, **pcmdp, *ncmdp;
-	char *cmd, *arg, *arg1, *p;
+	struct imap_cmd *cmdp, **pcmdp;
+	char *cmd, *arg, *arg1;
 	int n, resp, resp2, tag;
 
 	for (;;) {
@@ -801,39 +788,17 @@
 			if (!strcmp("OK", arg))
 				resp = DRV_OK;
 			else {
-				if (!strcmp("NO", arg)) {
-					if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
-						p = strchr(cmdp->cmd, '"');
-						if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
-							resp = RESP_BAD;
-							goto normal;
-						}
-						/* not waiting here violates the spec, but a server that does not
-						   grok this nonetheless violates it too. */
-						cmdp->cb.create = 0;
-						if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
-							resp = RESP_BAD;
-							goto normal;
-						}
-						free(cmdp->cmd);
-						free(cmdp);
-						if (!tcmd)
-							return 0;	/* ignored */
-						if (cmdp == tcmd)
-							tcmd = ncmdp;
-						continue;
-					}
+				if (!strcmp("NO", arg))
 					resp = RESP_NO;
-				} else /*if (!strcmp("BAD", arg))*/
+				else /*if (!strcmp("BAD", arg))*/
 					resp = RESP_BAD;
 				fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
-					 memcmp(cmdp->cmd, "LOGIN", 5) ?
+					!starts_with(cmdp->cmd, "LOGIN") ?
 							cmdp->cmd : "LOGIN <user> <pass>",
 							arg, cmd ? cmd : "");
 			}
 			if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 				resp = resp2;
-		normal:
 			if (cmdp->cb.done)
 				cmdp->cb.done(ctx, cmdp, resp);
 			free(cmdp->cb.data);
@@ -944,7 +909,7 @@
 	return 0;
 }
 
-static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
+static struct imap_store *imap_open_store(struct imap_server_conf *srvc, char *folder)
 {
 	struct credential cred = CREDENTIAL_INIT;
 	struct imap_store *ctx;
@@ -961,17 +926,16 @@
 	/* open connection to IMAP server */
 
 	if (srvc->tunnel) {
-		const char *argv[] = { srvc->tunnel, NULL };
-		struct child_process tunnel = {NULL};
+		struct child_process tunnel = CHILD_PROCESS_INIT;
 
 		imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 
-		tunnel.argv = argv;
+		argv_array_push(&tunnel.args, srvc->tunnel);
 		tunnel.use_shell = 1;
 		tunnel.in = -1;
 		tunnel.out = -1;
 		if (start_command(&tunnel))
-			die("cannot start proxy %s", argv[0]);
+			die("cannot start proxy %s", srvc->tunnel);
 
 		imap->buf.sock.fd[0] = tunnel.out;
 		imap->buf.sock.fd[1] = tunnel.in;
@@ -1156,6 +1120,25 @@
 		credential_approve(&cred);
 	credential_clear(&cred);
 
+	/* check the target mailbox exists */
+	ctx->name = folder;
+	switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
+	case RESP_OK:
+		/* ok */
+		break;
+	case RESP_BAD:
+		fprintf(stderr, "IMAP error: could not check mailbox\n");
+		goto out;
+	case RESP_NO:
+		if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
+			imap_info("Created missing mailbox\n");
+		} else {
+			fprintf(stderr, "IMAP error: could not create missing mailbox\n");
+			goto out;
+		}
+		break;
+	}
+
 	ctx->prefix = "";
 	return ctx;
 
@@ -1164,6 +1147,7 @@
 		credential_reject(&cred);
 	credential_clear(&cred);
 
+ out:
 	imap_close_store(ctx);
 	return NULL;
 }
@@ -1219,7 +1203,6 @@
 
 	box = ctx->name;
 	prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
-	cb.create = 0;
 	ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
 	imap->caps = imap->rcaps;
 	if (ret != DRV_OK)
@@ -1324,45 +1307,35 @@
 	return 1;
 }
 
-static char *imap_folder;
-
-static int git_imap_config(const char *key, const char *val, void *cb)
+static void git_imap_config(void)
 {
-	if (!skip_prefix(key, "imap.", &key))
-		return 0;
+	const char *val = NULL;
 
-	/* check booleans first, and barf on others */
-	if (!strcmp("sslverify", key))
-		server.ssl_verify = git_config_bool(key, val);
-	else if (!strcmp("preformattedhtml", key))
-		server.use_html = git_config_bool(key, val);
-	else if (!val)
-		return config_error_nonbool(key);
+	git_config_get_bool("imap.sslverify", &server.ssl_verify);
+	git_config_get_bool("imap.preformattedhtml", &server.use_html);
+	git_config_get_string("imap.folder", &server.folder);
 
-	if (!strcmp("folder", key)) {
-		imap_folder = xstrdup(val);
-	} else if (!strcmp("host", key)) {
-		if (starts_with(val, "imap:"))
-			val += 5;
-		else if (starts_with(val, "imaps:")) {
-			val += 6;
-			server.use_ssl = 1;
+	if (!git_config_get_value("imap.host", &val)) {
+		if (!val) {
+			git_die_config("imap.host", "Missing value for 'imap.host'");
+		} else {
+			if (starts_with(val, "imap:"))
+				val += 5;
+			else if (starts_with(val, "imaps:")) {
+				val += 6;
+				server.use_ssl = 1;
+			}
+			if (starts_with(val, "//"))
+				val += 2;
+			server.host = xstrdup(val);
 		}
-		if (starts_with(val, "//"))
-			val += 2;
-		server.host = xstrdup(val);
-	} else if (!strcmp("user", key))
-		server.user = xstrdup(val);
-	else if (!strcmp("pass", key))
-		server.pass = xstrdup(val);
-	else if (!strcmp("port", key))
-		server.port = git_config_int(key, val);
-	else if (!strcmp("tunnel", key))
-		server.tunnel = xstrdup(val);
-	else if (!strcmp("authmethod", key))
-		server.auth_method = xstrdup(val);
+	}
 
-	return 0;
+	git_config_get_string("imap.user", &server.user);
+	git_config_get_string("imap.pass", &server.pass);
+	git_config_get_int("imap.port", &server.port);
+	git_config_get_string("imap.tunnel", &server.tunnel);
+	git_config_get_string("imap.authmethod", &server.auth_method);
 }
 
 int main(int argc, char **argv)
@@ -1383,12 +1356,12 @@
 		usage(imap_send_usage);
 
 	setup_git_directory_gently(&nongit_ok);
-	git_config(git_imap_config, NULL);
+	git_imap_config();
 
 	if (!server.port)
 		server.port = server.use_ssl ? 993 : 143;
 
-	if (!imap_folder) {
+	if (!server.folder) {
 		fprintf(stderr, "no imap store specified\n");
 		return 1;
 	}
@@ -1418,14 +1391,13 @@
 	}
 
 	/* write it to the imap server */
-	ctx = imap_open_store(&server);
+	ctx = imap_open_store(&server, server.folder);
 	if (!ctx) {
 		fprintf(stderr, "failed to open store\n");
 		return 1;
 	}
 
 	fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
-	ctx->name = imap_folder;
 	while (1) {
 		unsigned percent = n * 100 / total;
 
diff --git a/ll-merge.c b/ll-merge.c
index fb61ea6..8ea03e5 100644
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -225,11 +225,8 @@
 	const char *key, *name;
 	int namelen;
 
-	if (!strcmp(var, "merge.default")) {
-		if (value)
-			default_ll_merge = xstrdup(value);
-		return 0;
-	}
+	if (!strcmp(var, "merge.default"))
+		return git_config_string(&default_ll_merge, var, value);
 
 	/*
 	 * We are not interested in anything but "merge.<name>.variable";
@@ -254,12 +251,8 @@
 		ll_user_merge_tail = &(fn->next);
 	}
 
-	if (!strcmp("name", key)) {
-		if (!value)
-			return error("%s: lacks value", var);
-		fn->description = xstrdup(value);
-		return 0;
-	}
+	if (!strcmp("name", key))
+		return git_config_string(&fn->description, var, value);
 
 	if (!strcmp("driver", key)) {
 		if (!value)
@@ -285,12 +278,8 @@
 		return 0;
 	}
 
-	if (!strcmp("recursive", key)) {
-		if (!value)
-			return error("%s: lacks value", var);
-		fn->recursive = xstrdup(value);
-		return 0;
-	}
+	if (!strcmp("recursive", key))
+		return git_config_string(&fn->recursive, var, value);
 
 	return 0;
 }
diff --git a/lockfile.c b/lockfile.c
index 2564a7f..2a800ce 100644
--- a/lockfile.c
+++ b/lockfile.c
@@ -237,6 +237,16 @@
 	return close(fd);
 }
 
+int reopen_lock_file(struct lock_file *lk)
+{
+	if (0 <= lk->fd)
+		die(_("BUG: reopen a lockfile that is still open"));
+	if (!lk->filename[0])
+		die(_("BUG: reopen a lockfile that has been committed"));
+	lk->fd = open(lk->filename, O_WRONLY);
+	return lk->fd;
+}
+
 int commit_lock_file(struct lock_file *lk)
 {
 	char result_file[PATH_MAX];
diff --git a/log-tree.c b/log-tree.c
index 0c53dc1..bcee7c5 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -12,17 +12,7 @@
 #include "sequencer.h"
 #include "line-log.h"
 
-struct decoration name_decoration = { "object names" };
-
-enum decoration_type {
-	DECORATION_NONE = 0,
-	DECORATION_REF_LOCAL,
-	DECORATION_REF_REMOTE,
-	DECORATION_REF_TAG,
-	DECORATION_REF_STASH,
-	DECORATION_REF_HEAD,
-	DECORATION_GRAFTED,
-};
+static struct decoration name_decoration = { "object names" };
 
 static char decoration_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_RESET,
@@ -84,15 +74,20 @@
 #define decorate_get_color_opt(o, ix) \
 	decorate_get_color((o)->use_color, ix)
 
-static void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
+void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
 {
 	int nlen = strlen(name);
-	struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + nlen);
+	struct name_decoration *res = xmalloc(sizeof(*res) + nlen + 1);
 	memcpy(res->name, name, nlen + 1);
 	res->type = type;
 	res->next = add_decoration(&name_decoration, obj, res);
 }
 
+const struct name_decoration *get_name_decoration(const struct object *obj)
+{
+	return lookup_decoration(&name_decoration, obj);
+}
+
 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 {
 	struct object *obj;
@@ -187,13 +182,13 @@
 			int use_color)
 {
 	const char *prefix;
-	struct name_decoration *decoration;
+	const struct name_decoration *decoration;
 	const char *color_commit =
 		diff_get_color(use_color, DIFF_COMMIT);
 	const char *color_reset =
 		decorate_get_color(use_color, DECORATION_NONE);
 
-	decoration = lookup_decoration(&name_decoration, &commit->object);
+	decoration = get_name_decoration(&commit->object);
 	if (!decoration)
 		return;
 	prefix = " (";
@@ -649,7 +644,7 @@
 		graph_show_commit_msg(opt->graph, &msgbuf);
 	else
 		fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
-	if (opt->use_terminator) {
+	if (opt->use_terminator && !commit_format_is_empty(opt->commit_format)) {
 		if (!opt->missing_newline)
 			graph_show_padding(opt->graph);
 		putchar(opt->diffopt.line_termination);
@@ -676,7 +671,8 @@
 		show_log(opt);
 		if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 		    opt->verbose_header &&
-		    opt->commit_format != CMIT_FMT_ONELINE) {
+		    opt->commit_format != CMIT_FMT_ONELINE &&
+		    !commit_format_is_empty(opt->commit_format)) {
 			/*
 			 * When showing a verbose header (i.e. log message),
 			 * and not in --pretty=oneline format, we would want
diff --git a/merge-recursive.c b/merge-recursive.c
index 1d332b8..8ab944c 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -2026,22 +2026,12 @@
 	return clean ? 0 : 1;
 }
 
-static int merge_recursive_config(const char *var, const char *value, void *cb)
+static void merge_recursive_config(struct merge_options *o)
 {
-	struct merge_options *o = cb;
-	if (!strcmp(var, "merge.verbosity")) {
-		o->verbosity = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "diff.renamelimit")) {
-		o->diff_rename_limit = git_config_int(var, value);
-		return 0;
-	}
-	if (!strcmp(var, "merge.renamelimit")) {
-		o->merge_rename_limit = git_config_int(var, value);
-		return 0;
-	}
-	return git_xmerge_config(var, value, cb);
+	git_config_get_int("merge.verbosity", &o->verbosity);
+	git_config_get_int("diff.renamelimit", &o->diff_rename_limit);
+	git_config_get_int("merge.renamelimit", &o->merge_rename_limit);
+	git_config(git_xmerge_config, NULL);
 }
 
 void init_merge_options(struct merge_options *o)
@@ -2052,7 +2042,7 @@
 	o->diff_rename_limit = -1;
 	o->merge_rename_limit = -1;
 	o->renormalize = 0;
-	git_config(merge_recursive_config, o);
+	merge_recursive_config(o);
 	if (getenv("GIT_MERGE_VERBOSITY"))
 		o->verbosity =
 			strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10);
diff --git a/pack-write.c b/pack-write.c
index 9ccf804..33293ce 100644
--- a/pack-write.c
+++ b/pack-write.c
@@ -288,13 +288,12 @@
 	 * case, we need it to remove the corresponding .keep file
 	 * later on.  If we don't get that then tough luck with it.
 	 */
-	if (read_in_full(ip_out, packname, 46) == 46 && packname[45] == '\n' &&
-	    memcmp(packname, "keep\t", 5) == 0) {
-		char path[PATH_MAX];
+	if (read_in_full(ip_out, packname, 46) == 46 && packname[45] == '\n') {
+		const char *name;
 		packname[45] = 0;
-		snprintf(path, sizeof(path), "%s/pack/pack-%s.keep",
-			 get_object_directory(), packname + 5);
-		return xstrdup(path);
+		if (skip_prefix(packname, "keep\t", &name))
+			return xstrfmt("%s/pack/pack-%s.keep",
+				       get_object_directory(), name);
 	}
 	return NULL;
 }
diff --git a/pager.c b/pager.c
index 8b5cbc5..b2b805a 100644
--- a/pager.c
+++ b/pager.c
@@ -6,19 +6,13 @@
 #define DEFAULT_PAGER "less"
 #endif
 
-struct pager_config {
-	const char *cmd;
-	int want;
-	char *value;
-};
-
 /*
  * This is split up from the rest of git so that we can do
  * something different on Windows.
  */
 
 static const char *pager_argv[] = { NULL, NULL };
-static struct child_process pager_process;
+static struct child_process pager_process = CHILD_PROCESS_INIT;
 
 static void wait_for_pager(void)
 {
@@ -155,30 +149,22 @@
 	return width;
 }
 
-static int pager_command_config(const char *var, const char *value, void *data)
-{
-	struct pager_config *c = data;
-	if (starts_with(var, "pager.") && !strcmp(var + 6, c->cmd)) {
-		int b = git_config_maybe_bool(var, value);
-		if (b >= 0)
-			c->want = b;
-		else {
-			c->want = 1;
-			c->value = xstrdup(value);
-		}
-	}
-	return 0;
-}
-
 /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
 int check_pager_config(const char *cmd)
 {
-	struct pager_config c;
-	c.cmd = cmd;
-	c.want = -1;
-	c.value = NULL;
-	git_config(pager_command_config, &c);
-	if (c.value)
-		pager_program = c.value;
-	return c.want;
+	int want = -1;
+	struct strbuf key = STRBUF_INIT;
+	const char *value = NULL;
+	strbuf_addf(&key, "pager.%s", cmd);
+	if (!git_config_get_value(key.buf, &value)) {
+		int b = git_config_maybe_bool(key.buf, value);
+		if (b >= 0)
+			want = b;
+		else {
+			want = 1;
+			pager_program = xstrdup(value);
+		}
+	}
+	strbuf_release(&key);
+	return want;
 }
diff --git a/path.c b/path.c
index 3afcdb4..f68df0c 100644
--- a/path.c
+++ b/path.c
@@ -148,10 +148,12 @@
 			*global = mkpathdup("%s/.gitconfig", home);
 	}
 
-	if (!xdg_home)
-		*xdg = NULL;
-	else
-		*xdg = mkpathdup("%s/git/%s", xdg_home, file);
+	if (xdg) {
+		if (!xdg_home)
+			*xdg = NULL;
+		else
+			*xdg = mkpathdup("%s/git/%s", xdg_home, file);
+	}
 
 	free(to_free);
 }
diff --git a/pretty.c b/pretty.c
index 3a1da6f..63e03b6 100644
--- a/pretty.c
+++ b/pretty.c
@@ -24,6 +24,11 @@
 static size_t commit_formats_alloc;
 static struct cmt_fmt_map *find_commit_format(const char *sought);
 
+int commit_format_is_empty(enum cmit_fmt fmt)
+{
+	return fmt == CMIT_FMT_USERFORMAT && !*user_format;
+}
+
 static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
 {
 	free(user_format);
@@ -65,7 +70,9 @@
 
 	commit_format->name = xstrdup(name);
 	commit_format->format = CMIT_FMT_USERFORMAT;
-	git_config_string(&fmt, var, value);
+	if (git_config_string(&fmt, var, value))
+		return -1;
+
 	if (starts_with(fmt, "format:") || starts_with(fmt, "tformat:")) {
 		commit_format->is_tformat = fmt[0] == 't';
 		fmt = strchr(fmt, ':') + 1;
@@ -146,7 +153,7 @@
 	struct cmt_fmt_map *commit_format;
 
 	rev->use_terminator = 0;
-	if (!arg || !*arg) {
+	if (!arg) {
 		rev->commit_format = CMIT_FMT_DEFAULT;
 		return;
 	}
@@ -155,7 +162,7 @@
 		return;
 	}
 
-	if (strchr(arg, '%')) {
+	if (!*arg || strchr(arg, '%')) {
 		save_user_format(rev, arg, 1);
 		return;
 	}
@@ -547,31 +554,11 @@
 	strbuf_addch(sb, '\n');
 }
 
-static char *get_header(const struct commit *commit, const char *msg,
-			const char *key)
+static char *get_header(const char *msg, const char *key)
 {
-	int key_len = strlen(key);
-	const char *line = msg;
-
-	while (line) {
-		const char *eol = strchrnul(line, '\n'), *next;
-
-		if (line == eol)
-			return NULL;
-		if (!*eol) {
-			warning("malformed commit (header is missing newline): %s",
-				sha1_to_hex(commit->object.sha1));
-			next = NULL;
-		} else
-			next = eol + 1;
-		if (eol - line > key_len &&
-		    !strncmp(line, key, key_len) &&
-		    line[key_len] == ' ') {
-			return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
-		}
-		line = next;
-	}
-	return NULL;
+	size_t len;
+	const char *v = find_commit_header(msg, key, &len);
+	return v ? xmemdupz(v, len) : NULL;
 }
 
 static char *replace_encoding_header(char *buf, const char *encoding)
@@ -617,11 +604,10 @@
 
 	if (!output_encoding || !*output_encoding) {
 		if (commit_encoding)
-			*commit_encoding =
-				get_header(commit, msg, "encoding");
+			*commit_encoding = get_header(msg, "encoding");
 		return msg;
 	}
-	encoding = get_header(commit, msg, "encoding");
+	encoding = get_header(msg, "encoding");
 	if (commit_encoding)
 		*commit_encoding = encoding;
 	use_encoding = encoding ? encoding : utf8;
@@ -731,9 +717,12 @@
 	case 'r':	/* date, relative */
 		strbuf_addstr(sb, show_ident_date(&s, DATE_RELATIVE));
 		return placeholder_len;
-	case 'i':	/* date, ISO 8601 */
+	case 'i':	/* date, ISO 8601-like */
 		strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601));
 		return placeholder_len;
+	case 'I':	/* date, ISO 8601 strict */
+		strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601_STRICT));
+		return placeholder_len;
 	}
 
 skip:
diff --git a/prompt.c b/prompt.c
index d7bb17c..e5b4938 100644
--- a/prompt.c
+++ b/prompt.c
@@ -6,7 +6,7 @@
 
 static char *do_askpass(const char *cmd, const char *prompt)
 {
-	struct child_process pass;
+	struct child_process pass = CHILD_PROCESS_INIT;
 	const char *args[3];
 	static struct strbuf buffer = STRBUF_INIT;
 	int err = 0;
@@ -15,7 +15,6 @@
 	args[1]	= prompt;
 	args[2] = NULL;
 
-	memset(&pass, 0, sizeof(pass));
 	pass.argv = args;
 	pass.out = -1;
 
diff --git a/read-cache.c b/read-cache.c
index 5d3c8bd..2fc1182 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1064,6 +1064,14 @@
 		return ce;
 	}
 
+	if (has_symlink_leading_path(ce->name, ce_namelen(ce))) {
+		if (ignore_missing)
+			return ce;
+		if (err)
+			*err = ENOENT;
+		return NULL;
+	}
+
 	if (lstat(ce->name, &st) < 0) {
 		if (ignore_missing && errno == ENOENT)
 			return ce;
@@ -1238,24 +1246,16 @@
 
 #define INDEX_FORMAT_DEFAULT 3
 
-static int index_format_config(const char *var, const char *value, void *cb)
-{
-	unsigned int *version = cb;
-	if (!strcmp(var, "index.version")) {
-		*version = git_config_int(var, value);
-		return 0;
-	}
-	return 1;
-}
-
 static unsigned int get_index_format_default(void)
 {
 	char *envversion = getenv("GIT_INDEX_VERSION");
 	char *endp;
+	int value;
 	unsigned int version = INDEX_FORMAT_DEFAULT;
 
 	if (!envversion) {
-		git_config(index_format_config, &version);
+		if (!git_config_get_int("index.version", &value))
+			version = value;
 		if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) {
 			warning(_("index.version set, but the value is invalid.\n"
 				  "Using version %i"), INDEX_FORMAT_DEFAULT);
@@ -1465,6 +1465,21 @@
 	return ce;
 }
 
+static void check_ce_order(struct cache_entry *ce, struct cache_entry *next_ce)
+{
+	int name_compare = strcmp(ce->name, next_ce->name);
+	if (0 < name_compare)
+		die("unordered stage entries in index");
+	if (!name_compare) {
+		if (!ce_stage(ce))
+			die("multiple stage entries for merged file '%s'",
+				ce->name);
+		if (ce_stage(ce) > ce_stage(next_ce))
+			die("unordered stage entries for '%s'",
+				ce->name);
+	}
+}
+
 /* remember to discard_cache() before reading a different cache! */
 int do_read_index(struct index_state *istate, const char *path, int must_exist)
 {
@@ -1526,6 +1541,9 @@
 		ce = create_from_disk(disk_ce, &consumed, previous_name);
 		set_index_entry(istate, i, ce);
 
+		if (i > 0)
+			check_ce_order(istate->cache[i - 1], ce);
+
 		src_offset += consumed;
 	}
 	strbuf_release(&previous_name_buf);
@@ -2172,7 +2190,6 @@
 		if (add_index_entry(istate, new_ce, 0))
 			return error("%s: cannot drop to stage #0",
 				     new_ce->name);
-		i = index_name_pos(istate, new_ce->name, len);
 	}
 	return unmerged;
 }
diff --git a/reflog-walk.c b/reflog-walk.c
index 9ce8b53..0e5174b 100644
--- a/reflog-walk.c
+++ b/reflog-walk.c
@@ -133,7 +133,7 @@
 	struct commit_reflog *last_commit_reflog;
 };
 
-void init_reflog_walk(struct reflog_walk_info** info)
+void init_reflog_walk(struct reflog_walk_info **info)
 {
 	*info = xcalloc(1, sizeof(struct reflog_walk_info));
 }
diff --git a/reflog-walk.h b/reflog-walk.h
index 50265f5..a9bd60e 100644
--- a/reflog-walk.h
+++ b/reflog-walk.h
@@ -5,7 +5,7 @@
 
 struct reflog_walk_info;
 
-extern void init_reflog_walk(struct reflog_walk_info** info);
+extern void init_reflog_walk(struct reflog_walk_info **info);
 extern int add_reflog_for_walk(struct reflog_walk_info *info,
 		struct commit *commit, const char *name);
 extern void fake_reflog_parent(struct reflog_walk_info *info,
diff --git a/refs.c b/refs.c
index 27927f2..2ce5d69 100644
--- a/refs.c
+++ b/refs.c
@@ -25,6 +25,11 @@
 };
 
 /*
+ * Used as a flag to ref_transaction_delete when a loose ref is being
+ * pruned.
+ */
+#define REF_ISPRUNING	0x0100
+/*
  * Try to read one refname component from the front of refname.
  * Return the length of the component found, or -1 if the component is
  * not legal.  It is legal if it is something reasonable to have under
@@ -2068,7 +2073,10 @@
 	return logs_found;
 }
 
-/* This function should make sure errno is meaningful on error */
+/*
+ * Locks a "refs/" ref returning the lock on success and NULL on failure.
+ * On failure errno is set to something meaningful.
+ */
 static struct ref_lock *lock_ref_sha1_basic(const char *refname,
 					    const unsigned char *old_sha1,
 					    int flags, int *type_p)
@@ -2169,15 +2177,6 @@
 	return NULL;
 }
 
-struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1)
-{
-	char refpath[PATH_MAX];
-	if (check_refname_format(refname, 0))
-		return NULL;
-	strcpy(refpath, mkpath("refs/%s", refname));
-	return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
-}
-
 struct ref_lock *lock_any_ref_for_update(const char *refname,
 					 const unsigned char *old_sha1,
 					 int flags, int *type_p)
@@ -2387,13 +2386,25 @@
 /* make sure nobody touched the ref, and unlink */
 static void prune_ref(struct ref_to_prune *r)
 {
-	struct ref_lock *lock = lock_ref_sha1(r->name + 5, r->sha1);
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
-	if (lock) {
-		unlink_or_warn(git_path("%s", r->name));
-		unlock_ref(lock);
-		try_remove_empty_parents(r->name);
+	if (check_refname_format(r->name, 0))
+		return;
+
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_delete(transaction, r->name, r->sha1,
+				   REF_ISPRUNING, 1, &err) ||
+	    ref_transaction_commit(transaction, NULL, &err)) {
+		ref_transaction_free(transaction);
+		error("%s", err.buf);
+		strbuf_release(&err);
+		return;
 	}
+	ref_transaction_free(transaction);
+	strbuf_release(&err);
+	try_remove_empty_parents(r->name);
 }
 
 static void prune_refs(struct ref_to_prune *r)
@@ -2536,11 +2547,6 @@
 	return ret;
 }
 
-static int repack_without_ref(const char *refname)
-{
-	return repack_without_refs(&refname, 1, NULL);
-}
-
 static int delete_ref_loose(struct ref_lock *lock, int flag)
 {
 	if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) {
@@ -2558,24 +2564,22 @@
 
 int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
 {
-	struct ref_lock *lock;
-	int ret = 0, flag = 0;
+	struct ref_transaction *transaction;
+	struct strbuf err = STRBUF_INIT;
 
-	lock = lock_ref_sha1_basic(refname, sha1, delopt, &flag);
-	if (!lock)
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_delete(transaction, refname, sha1, delopt,
+				   sha1 && !is_null_sha1(sha1), &err) ||
+	    ref_transaction_commit(transaction, NULL, &err)) {
+		error("%s", err.buf);
+		ref_transaction_free(transaction);
+		strbuf_release(&err);
 		return 1;
-	ret |= delete_ref_loose(lock, flag);
-
-	/* removing the loose one could have resurrected an earlier
-	 * packed one.  Also, if it was not loose we need to repack
-	 * without it.
-	 */
-	ret |= repack_without_ref(lock->ref_name);
-
-	unlink_or_warn(git_path("logs/%s", lock->ref_name));
-	clear_loose_ref_cache(&ref_cache);
-	unlock_ref(lock);
-	return ret;
+	}
+	ref_transaction_free(transaction);
+	strbuf_release(&err);
+	return 0;
 }
 
 /*
@@ -3332,43 +3336,6 @@
 	return retval;
 }
 
-static struct ref_lock *update_ref_lock(const char *refname,
-					const unsigned char *oldval,
-					int flags, int *type_p,
-					enum action_on_err onerr)
-{
-	struct ref_lock *lock;
-	lock = lock_any_ref_for_update(refname, oldval, flags, type_p);
-	if (!lock) {
-		const char *str = "Cannot lock the ref '%s'.";
-		switch (onerr) {
-		case UPDATE_REFS_MSG_ON_ERR: error(str, refname); break;
-		case UPDATE_REFS_DIE_ON_ERR: die(str, refname); break;
-		case UPDATE_REFS_QUIET_ON_ERR: break;
-		}
-	}
-	return lock;
-}
-
-static int update_ref_write(const char *action, const char *refname,
-			    const unsigned char *sha1, struct ref_lock *lock,
-			    struct strbuf *err, enum action_on_err onerr)
-{
-	if (write_ref_sha1(lock, sha1, action) < 0) {
-		const char *str = "Cannot update the ref '%s'.";
-		if (err)
-			strbuf_addf(err, str, refname);
-
-		switch (onerr) {
-		case UPDATE_REFS_MSG_ON_ERR: error(str, refname); break;
-		case UPDATE_REFS_DIE_ON_ERR: die(str, refname); break;
-		case UPDATE_REFS_QUIET_ON_ERR: break;
-		}
-		return 1;
-	}
-	return 0;
-}
-
 /**
  * Information needed for a single ref update.  Set new_sha1 to the
  * new value or to zero to delete the ref.  To check the old value
@@ -3386,6 +3353,21 @@
 };
 
 /*
+ * Transaction states.
+ * OPEN:   The transaction is in a valid state and can accept new updates.
+ *         An OPEN transaction can be committed.
+ * CLOSED: A closed transaction is no longer active and no other operations
+ *         than free can be used on it in this state.
+ *         A transaction can either become closed by successfully committing
+ *         an active transaction or if there is a failure while building
+ *         the transaction thus rendering it failed/inactive.
+ */
+enum ref_transaction_state {
+	REF_TRANSACTION_OPEN   = 0,
+	REF_TRANSACTION_CLOSED = 1
+};
+
+/*
  * Data structure for holding a reference transaction, which can
  * consist of checks and updates to multiple references, carried out
  * as atomically as possible.  This structure is opaque to callers.
@@ -3394,9 +3376,10 @@
 	struct ref_update **updates;
 	size_t alloc;
 	size_t nr;
+	enum ref_transaction_state state;
 };
 
-struct ref_transaction *ref_transaction_begin(void)
+struct ref_transaction *ref_transaction_begin(struct strbuf *err)
 {
 	return xcalloc(1, sizeof(struct ref_transaction));
 }
@@ -3436,6 +3419,9 @@
 {
 	struct ref_update *update;
 
+	if (transaction->state != REF_TRANSACTION_OPEN)
+		die("BUG: update called for transaction that is not open");
+
 	if (have_old && !old_sha1)
 		die("BUG: have_old is true but old_sha1 is NULL");
 
@@ -3448,44 +3434,84 @@
 	return 0;
 }
 
-void ref_transaction_create(struct ref_transaction *transaction,
-			    const char *refname,
-			    const unsigned char *new_sha1,
-			    int flags)
+int ref_transaction_create(struct ref_transaction *transaction,
+			   const char *refname,
+			   const unsigned char *new_sha1,
+			   int flags,
+			   struct strbuf *err)
 {
-	struct ref_update *update = add_update(transaction, refname);
+	struct ref_update *update;
 
-	assert(!is_null_sha1(new_sha1));
+	if (transaction->state != REF_TRANSACTION_OPEN)
+		die("BUG: create called for transaction that is not open");
+
+	if (!new_sha1 || is_null_sha1(new_sha1))
+		die("BUG: create ref with null new_sha1");
+
+	update = add_update(transaction, refname);
+
 	hashcpy(update->new_sha1, new_sha1);
 	hashclr(update->old_sha1);
 	update->flags = flags;
 	update->have_old = 1;
+	return 0;
 }
 
-void ref_transaction_delete(struct ref_transaction *transaction,
-			    const char *refname,
-			    const unsigned char *old_sha1,
-			    int flags, int have_old)
+int ref_transaction_delete(struct ref_transaction *transaction,
+			   const char *refname,
+			   const unsigned char *old_sha1,
+			   int flags, int have_old,
+			   struct strbuf *err)
 {
-	struct ref_update *update = add_update(transaction, refname);
+	struct ref_update *update;
 
+	if (transaction->state != REF_TRANSACTION_OPEN)
+		die("BUG: delete called for transaction that is not open");
+
+	if (have_old && !old_sha1)
+		die("BUG: have_old is true but old_sha1 is NULL");
+
+	update = add_update(transaction, refname);
 	update->flags = flags;
 	update->have_old = have_old;
 	if (have_old) {
 		assert(!is_null_sha1(old_sha1));
 		hashcpy(update->old_sha1, old_sha1);
 	}
+	return 0;
 }
 
 int update_ref(const char *action, const char *refname,
 	       const unsigned char *sha1, const unsigned char *oldval,
 	       int flags, enum action_on_err onerr)
 {
-	struct ref_lock *lock;
-	lock = update_ref_lock(refname, oldval, flags, NULL, onerr);
-	if (!lock)
+	struct ref_transaction *t;
+	struct strbuf err = STRBUF_INIT;
+
+	t = ref_transaction_begin(&err);
+	if (!t ||
+	    ref_transaction_update(t, refname, sha1, oldval, flags,
+				   !!oldval, &err) ||
+	    ref_transaction_commit(t, action, &err)) {
+		const char *str = "update_ref failed for ref '%s': %s";
+
+		ref_transaction_free(t);
+		switch (onerr) {
+		case UPDATE_REFS_MSG_ON_ERR:
+			error(str, refname, err.buf);
+			break;
+		case UPDATE_REFS_DIE_ON_ERR:
+			die(str, refname, err.buf);
+			break;
+		case UPDATE_REFS_QUIET_ON_ERR:
+			break;
+		}
+		strbuf_release(&err);
 		return 1;
-	return update_ref_write(action, refname, sha1, lock, NULL, onerr);
+	}
+	strbuf_release(&err);
+	ref_transaction_free(t);
+	return 0;
 }
 
 static int ref_update_compare(const void *r1, const void *r2)
@@ -3519,8 +3545,13 @@
 	int n = transaction->nr;
 	struct ref_update **updates = transaction->updates;
 
-	if (!n)
+	if (transaction->state != REF_TRANSACTION_OPEN)
+		die("BUG: commit called for transaction that is not open");
+
+	if (!n) {
+		transaction->state = REF_TRANSACTION_CLOSED;
 		return 0;
+	}
 
 	/* Allocate work space */
 	delnames = xmalloc(sizeof(*delnames) * n);
@@ -3535,12 +3566,12 @@
 	for (i = 0; i < n; i++) {
 		struct ref_update *update = updates[i];
 
-		update->lock = update_ref_lock(update->refname,
-					       (update->have_old ?
-						update->old_sha1 : NULL),
-					       update->flags,
-					       &update->type,
-					       UPDATE_REFS_QUIET_ON_ERR);
+		update->lock = lock_any_ref_for_update(update->refname,
+						       (update->have_old ?
+							update->old_sha1 :
+							NULL),
+						       update->flags,
+						       &update->type);
 		if (!update->lock) {
 			if (err)
 				strbuf_addf(err, "Cannot lock the ref '%s'.",
@@ -3555,14 +3586,15 @@
 		struct ref_update *update = updates[i];
 
 		if (!is_null_sha1(update->new_sha1)) {
-			ret = update_ref_write(msg,
-					       update->refname,
-					       update->new_sha1,
-					       update->lock, err,
-					       UPDATE_REFS_QUIET_ON_ERR);
-			update->lock = NULL; /* freed by update_ref_write */
-			if (ret)
+			ret = write_ref_sha1(update->lock, update->new_sha1,
+					     msg);
+			update->lock = NULL; /* freed by write_ref_sha1 */
+			if (ret) {
+				if (err)
+					strbuf_addf(err, "Cannot update the ref '%s'.",
+						    update->refname);
 				goto cleanup;
+			}
 		}
 	}
 
@@ -3571,8 +3603,9 @@
 		struct ref_update *update = updates[i];
 
 		if (update->lock) {
-			delnames[delnum++] = update->lock->ref_name;
 			ret |= delete_ref_loose(update->lock, update->type);
+			if (!(update->flags & REF_ISPRUNING))
+				delnames[delnum++] = update->lock->ref_name;
 		}
 	}
 
@@ -3582,6 +3615,8 @@
 	clear_loose_ref_cache(&ref_cache);
 
 cleanup:
+	transaction->state = REF_TRANSACTION_CLOSED;
+
 	for (i = 0; i < n; i++)
 		if (updates[i]->lock)
 			unlock_ref(updates[i]->lock);
diff --git a/refs.h b/refs.h
index ec46acd..10fc3a2 100644
--- a/refs.h
+++ b/refs.h
@@ -10,6 +10,38 @@
 	int force_write;
 };
 
+/*
+ * A ref_transaction represents a collection of ref updates
+ * that should succeed or fail together.
+ *
+ * Calling sequence
+ * ----------------
+ * - Allocate and initialize a `struct ref_transaction` by calling
+ *   `ref_transaction_begin()`.
+ *
+ * - List intended ref updates by calling functions like
+ *   `ref_transaction_update()` and `ref_transaction_create()`.
+ *
+ * - Call `ref_transaction_commit()` to execute the transaction.
+ *   If this succeeds, the ref updates will have taken place and
+ *   the transaction cannot be rolled back.
+ *
+ * - At any time call `ref_transaction_free()` to discard the
+ *   transaction and free associated resources.  In particular,
+ *   this rolls back the transaction if it has not been
+ *   successfully committed.
+ *
+ * Error handling
+ * --------------
+ *
+ * On error, transaction functions append a message about what
+ * went wrong to the 'err' argument.  The message mentions what
+ * ref was being updated (if any) when the error occurred so it
+ * can be passed to 'die' or 'error' as-is.
+ *
+ * The message is appended to err without first clearing err.
+ * err will not be '\n' terminated.
+ */
 struct ref_transaction;
 
 /*
@@ -77,7 +109,7 @@
 extern int for_each_rawref(each_ref_fn, void *);
 
 extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
-extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list* refnames);
+extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames);
 
 /*
  * Lock the packed-refs file for writing.  Flags is passed to
@@ -141,14 +173,17 @@
 extern int peel_ref(const char *refname, unsigned char *sha1);
 
 /*
- * Locks a "refs/" ref returning the lock on success and NULL on failure.
- * On failure errno is set to something meaningful.
+ * Flags controlling lock_any_ref_for_update(), ref_transaction_update(),
+ * ref_transaction_create(), etc.
+ * REF_NODEREF: act on the ref directly, instead of dereferencing
+ *              symbolic references.
+ *
+ * Flags >= 0x100 are reserved for internal use.
  */
-extern struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1);
-
-/** Locks any ref (for 'HEAD' type refs). */
 #define REF_NODEREF	0x01
-/* errno is set to something meaningful on failure */
+/*
+ * This function sets errno to something meaningful on failure.
+ */
 extern struct ref_lock *lock_any_ref_for_update(const char *refname,
 						const unsigned char *old_sha1,
 						int flags, int *type_p);
@@ -232,7 +267,7 @@
  * Begin a reference transaction.  The reference transaction must
  * be freed by calling ref_transaction_free().
  */
-struct ref_transaction *ref_transaction_begin(void);
+struct ref_transaction *ref_transaction_begin(struct strbuf *err);
 
 /*
  * The following functions add a reference check or update to a
@@ -250,7 +285,7 @@
  * it must not have existed beforehand.
  * Function returns 0 on success and non-zero on failure. A failure to update
  * means that the transaction as a whole has failed and will need to be
- * rolled back. On failure the err buffer will be updated.
+ * rolled back.
  */
 int ref_transaction_update(struct ref_transaction *transaction,
 			   const char *refname,
@@ -264,28 +299,34 @@
  * that the reference should have after the update; it must not be the
  * null SHA-1.  It is verified that the reference does not exist
  * already.
+ * Function returns 0 on success and non-zero on failure. A failure to create
+ * means that the transaction as a whole has failed and will need to be
+ * rolled back.
  */
-void ref_transaction_create(struct ref_transaction *transaction,
-			    const char *refname,
-			    const unsigned char *new_sha1,
-			    int flags);
+int ref_transaction_create(struct ref_transaction *transaction,
+			   const char *refname,
+			   const unsigned char *new_sha1,
+			   int flags,
+			   struct strbuf *err);
 
 /*
  * Add a reference deletion to transaction.  If have_old is true, then
  * old_sha1 holds the value that the reference should have had before
  * the update (which must not be the null SHA-1).
+ * Function returns 0 on success and non-zero on failure. A failure to delete
+ * means that the transaction as a whole has failed and will need to be
+ * rolled back.
  */
-void ref_transaction_delete(struct ref_transaction *transaction,
-			    const char *refname,
-			    const unsigned char *old_sha1,
-			    int flags, int have_old);
+int ref_transaction_delete(struct ref_transaction *transaction,
+			   const char *refname,
+			   const unsigned char *old_sha1,
+			   int flags, int have_old,
+			   struct strbuf *err);
 
 /*
  * Commit all of the changes that have been queued in transaction, as
  * atomically as possible.  Return a nonzero value if there is a
  * problem.
- * If err is non-NULL we will add an error string to it to explain why
- * the transaction failed. The string does not end in newline.
  */
 int ref_transaction_commit(struct ref_transaction *transaction,
 			   const char *msg, struct strbuf *err);
diff --git a/remote-curl.c b/remote-curl.c
index 0fcf2ce..cd626d1 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -221,7 +221,7 @@
 	return 0;
 }
 
-static struct discovery* discover_refs(const char *service, int for_push)
+static struct discovery *discover_refs(const char *service, int for_push)
 {
 	struct strbuf exp = STRBUF_INIT;
 	struct strbuf type = STRBUF_INIT;
@@ -623,10 +623,9 @@
 	const char *svc = rpc->service_name;
 	struct strbuf buf = STRBUF_INIT;
 	struct strbuf *preamble = rpc->stdin_preamble;
-	struct child_process client;
+	struct child_process client = CHILD_PROCESS_INIT;
 	int err = 0;
 
-	memset(&client, 0, sizeof(client));
 	client.in = -1;
 	client.out = -1;
 	client.git_cmd = 1;
@@ -863,6 +862,7 @@
 	int i, err;
 	struct argv_array args;
 	struct string_list_item *cas_option;
+	struct strbuf preamble = STRBUF_INIT;
 
 	argv_array_init(&args);
 	argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
@@ -880,17 +880,22 @@
 	for_each_string_list_item(cas_option, &cas_options)
 		argv_array_push(&args, cas_option->string);
 	argv_array_push(&args, url.buf);
+
+	argv_array_push(&args, "--stdin");
 	for (i = 0; i < nr_spec; i++)
-		argv_array_push(&args, specs[i]);
+		packet_buf_write(&preamble, "%s\n", specs[i]);
+	packet_buf_flush(&preamble);
 
 	memset(&rpc, 0, sizeof(rpc));
 	rpc.service_name = "git-receive-pack",
 	rpc.argv = args.argv;
+	rpc.stdin_preamble = &preamble;
 
 	err = rpc_service(&rpc, heads);
 	if (rpc.result.len)
 		write_or_die(1, rpc.result.buf, rpc.result.len);
 	strbuf_release(&rpc.result);
+	strbuf_release(&preamble);
 	argv_array_clear(&args);
 	return err;
 }
diff --git a/remote-testsvn.c b/remote-testsvn.c
index 686e07d..48bf6eb 100644
--- a/remote-testsvn.c
+++ b/remote-testsvn.c
@@ -175,7 +175,7 @@
 	char *note_msg;
 	unsigned char head_sha1[20];
 	unsigned int startrev;
-	struct child_process svndump_proc;
+	struct child_process svndump_proc = CHILD_PROCESS_INIT;
 	const char *command = "svnrdump";
 
 	if (read_ref(private_ref, head_sha1))
@@ -200,7 +200,6 @@
 		if(dumpin_fd < 0)
 			die_errno("Couldn't open svn dump file %s.", url);
 	} else {
-		memset(&svndump_proc, 0, sizeof(struct child_process));
 		svndump_proc.out = -1;
 		argv_array_push(&svndump_proc.args, command);
 		argv_array_push(&svndump_proc.args, "dump");
diff --git a/remote.c b/remote.c
index 3d6c86a..35e62ee 100644
--- a/remote.c
+++ b/remote.c
@@ -42,6 +42,7 @@
 static struct remote **remotes;
 static int remotes_alloc;
 static int remotes_nr;
+static struct hashmap remotes_hash;
 
 static struct branch **branches;
 static int branches_alloc;
@@ -136,26 +137,51 @@
 	add_pushurl_alias(remote, url);
 }
 
+struct remotes_hash_key {
+	const char *str;
+	int len;
+};
+
+static int remotes_hash_cmp(const struct remote *a, const struct remote *b, const struct remotes_hash_key *key)
+{
+	if (key)
+		return strncmp(a->name, key->str, key->len) || a->name[key->len];
+	else
+		return strcmp(a->name, b->name);
+}
+
+static inline void init_remotes_hash(void)
+{
+	if (!remotes_hash.cmpfn)
+		hashmap_init(&remotes_hash, (hashmap_cmp_fn)remotes_hash_cmp, 0);
+}
+
 static struct remote *make_remote(const char *name, int len)
 {
-	struct remote *ret;
-	int i;
+	struct remote *ret, *replaced;
+	struct remotes_hash_key lookup;
+	struct hashmap_entry lookup_entry;
 
-	for (i = 0; i < remotes_nr; i++) {
-		if (len ? (!strncmp(name, remotes[i]->name, len) &&
-			   !remotes[i]->name[len]) :
-		    !strcmp(name, remotes[i]->name))
-			return remotes[i];
-	}
+	if (!len)
+		len = strlen(name);
+
+	init_remotes_hash();
+	lookup.str = name;
+	lookup.len = len;
+	hashmap_entry_init(&lookup_entry, memhash(name, len));
+
+	if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL)
+		return ret;
 
 	ret = xcalloc(1, sizeof(struct remote));
 	ret->prune = -1;  /* unspecified */
 	ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
 	remotes[remotes_nr++] = ret;
-	if (len)
-		ret->name = xstrndup(name, len);
-	else
-		ret->name = xstrdup(name);
+	ret->name = xstrndup(name, len);
+
+	hashmap_entry_init(ret, lookup_entry.hash);
+	replaced = hashmap_put(&remotes_hash, ret);
+	assert(replaced == NULL);  /* no previous entry overwritten */
 	return ret;
 }
 
@@ -717,13 +743,16 @@
 
 int remote_is_configured(const char *name)
 {
-	int i;
+	struct remotes_hash_key lookup;
+	struct hashmap_entry lookup_entry;
 	read_config();
 
-	for (i = 0; i < remotes_nr; i++)
-		if (!strcmp(name, remotes[i]->name))
-			return 1;
-	return 0;
+	init_remotes_hash();
+	lookup.str = name;
+	lookup.len = strlen(name);
+	hashmap_entry_init(&lookup_entry, memhash(name, lookup.len));
+
+	return hashmap_get(&remotes_hash, &lookup_entry, &lookup) != NULL;
 }
 
 int for_each_remote(each_remote_fn fn, void *priv)
@@ -1893,7 +1922,8 @@
 
 	init_revisions(&revs, NULL);
 	setup_revisions(rev_argc, rev_argv, &revs, NULL);
-	prepare_revision_walk(&revs);
+	if (prepare_revision_walk(&revs))
+		die("revision walk setup failed");
 
 	/* ... and count the commits on each side. */
 	*num_ours = 0;
@@ -1920,7 +1950,7 @@
 int format_tracking_info(struct branch *branch, struct strbuf *sb)
 {
 	int ours, theirs;
-	const char *base;
+	char *base;
 	int upstream_is_gone = 0;
 
 	switch (stat_tracking_info(branch, &ours, &theirs)) {
@@ -1936,8 +1966,7 @@
 		break;
 	}
 
-	base = branch->merge[0]->dst;
-	base = shorten_unambiguous_ref(base, 0);
+	base = shorten_unambiguous_ref(branch->merge[0]->dst, 0);
 	if (upstream_is_gone) {
 		strbuf_addf(sb,
 			_("Your branch is based on '%s', but the upstream is gone.\n"),
@@ -1983,6 +2012,7 @@
 			strbuf_addf(sb,
 				_("  (use \"git pull\" to merge the remote branch into yours)\n"));
 	}
+	free(base);
 	return 1;
 }
 
diff --git a/remote.h b/remote.h
index 917d383..8b62efd 100644
--- a/remote.h
+++ b/remote.h
@@ -2,6 +2,7 @@
 #define REMOTE_H
 
 #include "parse-options.h"
+#include "hashmap.h"
 
 enum {
 	REMOTE_CONFIG,
@@ -10,6 +11,8 @@
 };
 
 struct remote {
+	struct hashmap_entry ent;  /* must be first */
+
 	const char *name;
 	int origin;
 
diff --git a/rerere.c b/rerere.c
index d84b495..20b18ad 100644
--- a/rerere.c
+++ b/rerere.c
@@ -573,15 +573,11 @@
 	return write_rr(rr, fd);
 }
 
-static int git_rerere_config(const char *var, const char *value, void *cb)
+static void git_rerere_config(void)
 {
-	if (!strcmp(var, "rerere.enabled"))
-		rerere_enabled = git_config_bool(var, value);
-	else if (!strcmp(var, "rerere.autoupdate"))
-		rerere_autoupdate = git_config_bool(var, value);
-	else
-		return git_default_config(var, value, cb);
-	return 0;
+	git_config_get_bool("rerere.enabled", &rerere_enabled);
+	git_config_get_bool("rerere.autoupdate", &rerere_autoupdate);
+	git_config(git_default_config, NULL);
 }
 
 static int is_rerere_enabled(void)
@@ -606,7 +602,7 @@
 {
 	int fd;
 
-	git_config(git_rerere_config, NULL);
+	git_rerere_config();
 	if (!is_rerere_enabled())
 		return -1;
 
@@ -699,24 +695,6 @@
 	rmdir(git_path("rr-cache/%s", name));
 }
 
-struct rerere_gc_config_cb {
-	int cutoff_noresolve;
-	int cutoff_resolve;
-};
-
-static int git_rerere_gc_config(const char *var, const char *value, void *cb)
-{
-	struct rerere_gc_config_cb *cf = cb;
-
-	if (!strcmp(var, "gc.rerereresolved"))
-		cf->cutoff_resolve = git_config_int(var, value);
-	else if (!strcmp(var, "gc.rerereunresolved"))
-		cf->cutoff_noresolve = git_config_int(var, value);
-	else
-		return git_default_config(var, value, cb);
-	return 0;
-}
-
 void rerere_gc(struct string_list *rr)
 {
 	struct string_list to_remove = STRING_LIST_INIT_DUP;
@@ -724,9 +702,12 @@
 	struct dirent *e;
 	int i, cutoff;
 	time_t now = time(NULL), then;
-	struct rerere_gc_config_cb cf = { 15, 60 };
+	int cutoff_noresolve = 15;
+	int cutoff_resolve = 60;
 
-	git_config(git_rerere_gc_config, &cf);
+	git_config_get_int("gc.rerereresolved", &cutoff_resolve);
+	git_config_get_int("gc.rerereunresolved", &cutoff_noresolve);
+	git_config(git_default_config, NULL);
 	dir = opendir(git_path("rr-cache"));
 	if (!dir)
 		die_errno("unable to open rr-cache directory");
@@ -736,12 +717,12 @@
 
 		then = rerere_last_used_at(e->d_name);
 		if (then) {
-			cutoff = cf.cutoff_resolve;
+			cutoff = cutoff_resolve;
 		} else {
 			then = rerere_created_at(e->d_name);
 			if (!then)
 				continue;
-			cutoff = cf.cutoff_noresolve;
+			cutoff = cutoff_noresolve;
 		}
 		if (then < now - cutoff * 86400)
 			string_list_append(&to_remove, e->d_name);
diff --git a/revision.c b/revision.c
index 2571ada..0d3e417 100644
--- a/revision.c
+++ b/revision.c
@@ -473,7 +473,7 @@
 		 * If we are simplifying by decoration, then the commit
 		 * is worth showing if it has a tag pointing at it.
 		 */
-		if (lookup_decoration(&name_decoration, &commit->object))
+		if (get_name_decoration(&commit->object))
 			return REV_TREE_DIFFERENT;
 		/*
 		 * A commit that is not pointed by a tag is uninteresting
@@ -1825,7 +1825,7 @@
 	} else if (!strcmp(arg, "--pretty")) {
 		revs->verbose_header = 1;
 		revs->pretty_given = 1;
-		get_commit_format(arg+8, revs);
+		get_commit_format(NULL, revs);
 	} else if (starts_with(arg, "--pretty=") || starts_with(arg, "--format=")) {
 		/*
 		 * Detached form ("--pretty X" as opposed to "--pretty=X")
diff --git a/run-command.c b/run-command.c
index 35a3ebf..761f0fd 100644
--- a/run-command.c
+++ b/run-command.c
@@ -8,6 +8,12 @@
 # define SHELL_PATH "/bin/sh"
 #endif
 
+void child_process_init(struct child_process *child)
+{
+	memset(child, 0, sizeof(*child));
+	argv_array_init(&child->args);
+}
+
 struct child_to_clean {
 	pid_t pid;
 	struct child_to_clean *next;
@@ -555,31 +561,21 @@
 	return finish_command(cmd);
 }
 
-static void prepare_run_command_v_opt(struct child_process *cmd,
-				      const char **argv,
-				      int opt)
-{
-	memset(cmd, 0, sizeof(*cmd));
-	cmd->argv = argv;
-	cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
-	cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
-	cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
-	cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
-	cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0;
-	cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
-}
-
 int run_command_v_opt(const char **argv, int opt)
 {
-	struct child_process cmd;
-	prepare_run_command_v_opt(&cmd, argv, opt);
-	return run_command(&cmd);
+	return run_command_v_opt_cd_env(argv, opt, NULL, NULL);
 }
 
 int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env)
 {
-	struct child_process cmd;
-	prepare_run_command_v_opt(&cmd, argv, opt);
+	struct child_process cmd = CHILD_PROCESS_INIT;
+	cmd.argv = argv;
+	cmd.no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
+	cmd.git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
+	cmd.stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
+	cmd.silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
+	cmd.use_shell = opt & RUN_USING_SHELL ? 1 : 0;
+	cmd.clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
 	cmd.dir = dir;
 	cmd.env = env;
 	return run_command(&cmd);
@@ -763,14 +759,13 @@
 
 int run_hook_ve(const char *const *env, const char *name, va_list args)
 {
-	struct child_process hook;
+	struct child_process hook = CHILD_PROCESS_INIT;
 	const char *p;
 
 	p = find_hook(name);
 	if (!p)
 		return 0;
 
-	memset(&hook, 0, sizeof(hook));
 	argv_array_push(&hook.args, p);
 	while ((p = va_arg(args, const char *)))
 		argv_array_push(&hook.args, p);
diff --git a/run-command.h b/run-command.h
index ea73de3..1b135d1 100644
--- a/run-command.h
+++ b/run-command.h
@@ -44,6 +44,9 @@
 	unsigned clean_on_exit:1;
 };
 
+#define CHILD_PROCESS_INIT { NULL, ARGV_ARRAY_INIT }
+void child_process_init(struct child_process *);
+
 int start_command(struct child_process *);
 int finish_command(struct child_process *);
 int run_command(struct child_process *);
diff --git a/send-pack.c b/send-pack.c
index 6129b0f..8b4cbf0 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -47,7 +47,7 @@
 		NULL,
 		NULL,
 	};
-	struct child_process po;
+	struct child_process po = CHILD_PROCESS_INIT;
 	int i;
 
 	i = 4;
@@ -59,7 +59,6 @@
 		argv[i++] = "-q";
 	if (args->progress)
 		argv[i++] = "--progress";
-	memset(&po, 0, sizeof(po));
 	po.argv = argv;
 	po.in = -1;
 	po.out = args->stateless_rpc ? -1 : fd;
diff --git a/sequencer.c b/sequencer.c
index 3c060e0..5e8a207 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -237,23 +237,33 @@
 static int fast_forward_to(const unsigned char *to, const unsigned char *from,
 			int unborn, struct replay_opts *opts)
 {
-	struct ref_lock *ref_lock;
+	struct ref_transaction *transaction;
 	struct strbuf sb = STRBUF_INIT;
-	int ret;
+	struct strbuf err = STRBUF_INIT;
 
 	read_cache();
 	if (checkout_fast_forward(from, to, 1))
 		exit(128); /* the callee should have complained already */
-	ref_lock = lock_any_ref_for_update("HEAD", unborn ? null_sha1 : from,
-					   0, NULL);
-	if (!ref_lock)
-		return error(_("Failed to lock HEAD during fast_forward_to"));
 
 	strbuf_addf(&sb, "%s: fast-forward", action_name(opts));
-	ret = write_ref_sha1(ref_lock, to, sb.buf);
+
+	transaction = ref_transaction_begin(&err);
+	if (!transaction ||
+	    ref_transaction_update(transaction, "HEAD",
+				   to, unborn ? null_sha1 : from,
+				   0, 1, &err) ||
+	    ref_transaction_commit(transaction, sb.buf, &err)) {
+		ref_transaction_free(transaction);
+		error("%s", err.buf);
+		strbuf_release(&sb);
+		strbuf_release(&err);
+		return -1;
+	}
 
 	strbuf_release(&sb);
-	return ret;
+	strbuf_release(&err);
+	ref_transaction_free(transaction);
+	return 0;
 }
 
 static int do_recursive_merge(struct commit *base, struct commit *next,
diff --git a/setup.c b/setup.c
index 0a22f8b..979b13f 100644
--- a/setup.c
+++ b/setup.c
@@ -387,7 +387,7 @@
 }
 
 static const char *setup_explicit_git_dir(const char *gitdirenv,
-					  char *cwd, int len,
+					  struct strbuf *cwd,
 					  int *nongit_ok)
 {
 	const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
@@ -434,16 +434,16 @@
 		if (is_absolute_path(git_work_tree_cfg))
 			set_git_work_tree(git_work_tree_cfg);
 		else {
-			char core_worktree[PATH_MAX];
+			char *core_worktree;
 			if (chdir(gitdirenv))
 				die_errno("Could not chdir to '%s'", gitdirenv);
 			if (chdir(git_work_tree_cfg))
 				die_errno("Could not chdir to '%s'", git_work_tree_cfg);
-			if (!getcwd(core_worktree, PATH_MAX))
-				die_errno("Could not get directory '%s'", git_work_tree_cfg);
-			if (chdir(cwd))
+			core_worktree = xgetcwd();
+			if (chdir(cwd->buf))
 				die_errno("Could not come back to cwd");
 			set_git_work_tree(core_worktree);
+			free(core_worktree);
 		}
 	}
 	else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
@@ -459,21 +459,20 @@
 	worktree = get_git_work_tree();
 
 	/* both get_git_work_tree() and cwd are already normalized */
-	if (!strcmp(cwd, worktree)) { /* cwd == worktree */
+	if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
 		set_git_dir(gitdirenv);
 		free(gitfile);
 		return NULL;
 	}
 
-	offset = dir_inside_of(cwd, worktree);
+	offset = dir_inside_of(cwd->buf, worktree);
 	if (offset >= 0) {	/* cwd inside worktree? */
 		set_git_dir(real_path(gitdirenv));
 		if (chdir(worktree))
 			die_errno("Could not chdir to '%s'", worktree);
-		cwd[len++] = '/';
-		cwd[len] = '\0';
+		strbuf_addch(cwd, '/');
 		free(gitfile);
-		return cwd + offset;
+		return cwd->buf + offset;
 	}
 
 	/* cwd outside worktree */
@@ -483,7 +482,7 @@
 }
 
 static const char *setup_discovered_git_dir(const char *gitdir,
-					    char *cwd, int offset, int len,
+					    struct strbuf *cwd, int offset,
 					    int *nongit_ok)
 {
 	if (check_repository_format_gently(gitdir, nongit_ok))
@@ -491,17 +490,17 @@
 
 	/* --work-tree is set without --git-dir; use discovered one */
 	if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
-		if (offset != len && !is_absolute_path(gitdir))
+		if (offset != cwd->len && !is_absolute_path(gitdir))
 			gitdir = xstrdup(real_path(gitdir));
-		if (chdir(cwd))
+		if (chdir(cwd->buf))
 			die_errno("Could not come back to cwd");
-		return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+		return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
 	}
 
 	/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
 	if (is_bare_repository_cfg > 0) {
-		set_git_dir(offset == len ? gitdir : real_path(gitdir));
-		if (chdir(cwd))
+		set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
+		if (chdir(cwd->buf))
 			die_errno("Could not come back to cwd");
 		return NULL;
 	}
@@ -512,18 +511,18 @@
 		set_git_dir(gitdir);
 	inside_git_dir = 0;
 	inside_work_tree = 1;
-	if (offset == len)
+	if (offset == cwd->len)
 		return NULL;
 
 	/* Make "offset" point to past the '/', and add a '/' at the end */
 	offset++;
-	cwd[len++] = '/';
-	cwd[len] = 0;
-	return cwd + offset;
+	strbuf_addch(cwd, '/');
+	return cwd->buf + offset;
 }
 
 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
-static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
+static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
+				      int *nongit_ok)
 {
 	int root_len;
 
@@ -536,20 +535,20 @@
 	if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
 		const char *gitdir;
 
-		gitdir = offset == len ? "." : xmemdupz(cwd, offset);
-		if (chdir(cwd))
+		gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
+		if (chdir(cwd->buf))
 			die_errno("Could not come back to cwd");
-		return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+		return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
 	}
 
 	inside_git_dir = 1;
 	inside_work_tree = 0;
-	if (offset != len) {
-		if (chdir(cwd))
+	if (offset != cwd->len) {
+		if (chdir(cwd->buf))
 			die_errno("Cannot come back to cwd");
-		root_len = offset_1st_component(cwd);
-		cwd[offset > root_len ? offset : root_len] = '\0';
-		set_git_dir(cwd);
+		root_len = offset_1st_component(cwd->buf);
+		strbuf_setlen(cwd, offset > root_len ? offset : root_len);
+		set_git_dir(cwd->buf);
 	}
 	else
 		set_git_dir(".");
@@ -617,14 +616,23 @@
 {
 	const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
 	struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
-	static char cwd[PATH_MAX + 1];
+	static struct strbuf cwd = STRBUF_INIT;
 	const char *gitdirenv, *ret;
 	char *gitfile;
-	int len, offset, offset_parent, ceil_offset = -1;
+	int offset, offset_parent, ceil_offset = -1;
 	dev_t current_device = 0;
 	int one_filesystem = 1;
 
 	/*
+	 * We may have read an incomplete configuration before
+	 * setting-up the git directory. If so, clear the cache so
+	 * that the next queries to the configuration reload complete
+	 * configuration (including the per-repo config file that we
+	 * ignored previously).
+	 */
+	git_config_clear();
+
+	/*
 	 * Let's assume that we are in a git repository.
 	 * If it turns out later that we are somewhere else, the value will be
 	 * updated accordingly.
@@ -632,9 +640,9 @@
 	if (nongit_ok)
 		*nongit_ok = 0;
 
-	if (!getcwd(cwd, sizeof(cwd) - 1))
+	if (strbuf_getcwd(&cwd))
 		die_errno("Unable to read current working directory");
-	offset = len = strlen(cwd);
+	offset = cwd.len;
 
 	/*
 	 * If GIT_DIR is set explicitly, we're not going
@@ -643,7 +651,7 @@
 	 */
 	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
 	if (gitdirenv)
-		return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
+		return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
 
 	if (env_ceiling_dirs) {
 		int empty_entry_found = 0;
@@ -651,11 +659,11 @@
 		string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
 		filter_string_list(&ceiling_dirs, 0,
 				   canonicalize_ceiling_entry, &empty_entry_found);
-		ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
+		ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
 		string_list_clear(&ceiling_dirs, 0);
 	}
 
-	if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
+	if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
 		ceil_offset = 1;
 
 	/*
@@ -683,7 +691,7 @@
 
 		if (gitdirenv) {
 			ret = setup_discovered_git_dir(gitdirenv,
-						       cwd, offset, len,
+						       &cwd, offset,
 						       nongit_ok);
 			free(gitfile);
 			return ret;
@@ -691,29 +699,31 @@
 		free(gitfile);
 
 		if (is_git_directory("."))
-			return setup_bare_git_dir(cwd, offset, len, nongit_ok);
+			return setup_bare_git_dir(&cwd, offset, nongit_ok);
 
 		offset_parent = offset;
-		while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
+		while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
 		if (offset_parent <= ceil_offset)
-			return setup_nongit(cwd, nongit_ok);
+			return setup_nongit(cwd.buf, nongit_ok);
 		if (one_filesystem) {
-			dev_t parent_device = get_device_or_die("..", cwd, offset);
+			dev_t parent_device = get_device_or_die("..", cwd.buf,
+								offset);
 			if (parent_device != current_device) {
 				if (nongit_ok) {
-					if (chdir(cwd))
+					if (chdir(cwd.buf))
 						die_errno("Cannot come back to cwd");
 					*nongit_ok = 1;
 					return NULL;
 				}
-				cwd[offset] = '\0';
+				strbuf_setlen(&cwd, offset);
 				die("Not a git repository (or any parent up to mount point %s)\n"
-				"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
+				"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
+				    cwd.buf);
 			}
 		}
 		if (chdir("..")) {
-			cwd[offset] = '\0';
-			die_errno("Cannot change to '%s/..'", cwd);
+			strbuf_setlen(&cwd, offset);
+			die_errno("Cannot change to '%s/..'", cwd.buf);
 		}
 		offset = offset_parent;
 	}
diff --git a/sha1_file.c b/sha1_file.c
index 3f70b1d..c08c0cb 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -350,7 +350,7 @@
 		return;
 	}
 
-	strbuf_addstr(&objdirbuf, absolute_path(get_object_directory()));
+	strbuf_add_absolute_path(&objdirbuf, get_object_directory());
 	normalize_path_copy(objdirbuf.buf, objdirbuf.buf);
 
 	alt_copy = xmemdupz(alt, len);
@@ -1923,7 +1923,9 @@
 	git_zstream stream;
 	unsigned char *buffer, *in;
 
-	buffer = xmallocz(size);
+	buffer = xmallocz_gently(size);
+	if (!buffer)
+		return NULL;
 	memset(&stream, 0, sizeof(stream));
 	stream.next_out = buffer;
 	stream.avail_out = size + 1;
diff --git a/sha1_name.c b/sha1_name.c
index 63ee66f..7098b10 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -839,7 +839,7 @@
 	}
 	if (object->type != OBJ_COMMIT)
 		return 0;
-	commit_list_insert_by_date((struct commit *)object, list);
+	commit_list_insert((struct commit *)object, list);
 	return 0;
 }
 
@@ -1366,6 +1366,7 @@
 		if (!only_to_die && namelen > 2 && name[1] == '/') {
 			struct commit_list *list = NULL;
 			for_each_ref(handle_one_ref, &list);
+			commit_list_sort_by_date(&list);
 			return get_sha1_oneline(name + 2, sha1, list);
 		}
 		if (namelen < 3 ||
diff --git a/strbuf.c b/strbuf.c
index 33018d8..4d31443 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -406,6 +406,27 @@
 	return -1;
 }
 
+int strbuf_getcwd(struct strbuf *sb)
+{
+	size_t oldalloc = sb->alloc;
+	size_t guessed_len = 128;
+
+	for (;; guessed_len *= 2) {
+		strbuf_grow(sb, guessed_len);
+		if (getcwd(sb->buf, sb->alloc)) {
+			strbuf_setlen(sb, strlen(sb->buf));
+			return 0;
+		}
+		if (errno != ERANGE)
+			break;
+	}
+	if (oldalloc == 0)
+		strbuf_release(sb);
+	else
+		strbuf_reset(sb);
+	return -1;
+}
+
 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
 {
 	int ch;
@@ -555,6 +576,31 @@
 	}
 }
 
+void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
+{
+	if (!*path)
+		die("The empty string is not a valid path");
+	if (!is_absolute_path(path)) {
+		struct stat cwd_stat, pwd_stat;
+		size_t orig_len = sb->len;
+		char *cwd = xgetcwd();
+		char *pwd = getenv("PWD");
+		if (pwd && strcmp(pwd, cwd) &&
+		    !stat(cwd, &cwd_stat) &&
+		    (cwd_stat.st_dev || cwd_stat.st_ino) &&
+		    !stat(pwd, &pwd_stat) &&
+		    pwd_stat.st_dev == cwd_stat.st_dev &&
+		    pwd_stat.st_ino == cwd_stat.st_ino)
+			strbuf_addstr(sb, pwd);
+		else
+			strbuf_addstr(sb, cwd);
+		if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
+			strbuf_addch(sb, '/');
+		free(cwd);
+	}
+	strbuf_addstr(sb, path);
+}
+
 int printf_ln(const char *fmt, ...)
 {
 	int ret;
diff --git a/strbuf.h b/strbuf.h
index a7c0192..7bdc1da 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -174,6 +174,7 @@
 extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
 extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
+extern int strbuf_getcwd(struct strbuf *sb);
 
 extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
 extern int strbuf_getline(struct strbuf *, FILE *, int);
@@ -189,6 +190,8 @@
 				    int reserved);
 extern void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes);
 
+extern void strbuf_add_absolute_path(struct strbuf *sb, const char *path);
+
 __attribute__((format (printf,1,2)))
 extern int printf_ln(const char *fmt, ...);
 __attribute__((format (printf,2,3)))
diff --git a/submodule.c b/submodule.c
index c3a61e7..0690dc5 100644
--- a/submodule.c
+++ b/submodule.c
@@ -433,13 +433,12 @@
 		return 0;
 
 	if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
-		struct child_process cp;
+		struct child_process cp = CHILD_PROCESS_INIT;
 		const char *argv[] = {"rev-list", NULL, "--not", "--remotes", "-n", "1" , NULL};
 		struct strbuf buf = STRBUF_INIT;
 		int needs_pushing = 0;
 
 		argv[1] = sha1_to_hex(sha1);
-		memset(&cp, 0, sizeof(cp));
 		cp.argv = argv;
 		cp.env = local_repo_env;
 		cp.git_cmd = 1;
@@ -524,10 +523,9 @@
 		return 1;
 
 	if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
-		struct child_process cp;
+		struct child_process cp = CHILD_PROCESS_INIT;
 		const char *argv[] = {"push", NULL};
 
-		memset(&cp, 0, sizeof(cp));
 		cp.argv = argv;
 		cp.env = local_repo_env;
 		cp.git_cmd = 1;
@@ -569,12 +567,11 @@
 	if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) {
 		/* Even if the submodule is checked out and the commit is
 		 * present, make sure it is reachable from a ref. */
-		struct child_process cp;
+		struct child_process cp = CHILD_PROCESS_INIT;
 		const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL};
 		struct strbuf buf = STRBUF_INIT;
 
 		argv[3] = sha1_to_hex(sha1);
-		memset(&cp, 0, sizeof(cp));
 		cp.argv = argv;
 		cp.env = local_repo_env;
 		cp.git_cmd = 1;
@@ -695,7 +692,7 @@
 			       int quiet)
 {
 	int i, result = 0;
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	struct argv_array argv = ARGV_ARRAY_INIT;
 	struct string_list_item *name_for_path;
 	const char *work_tree = get_git_work_tree();
@@ -711,7 +708,6 @@
 	argv_array_push(&argv, "--recurse-submodules-default");
 	/* default value, "--submodule-prefix" and its value are added later */
 
-	memset(&cp, 0, sizeof(cp));
 	cp.env = local_repo_env;
 	cp.git_cmd = 1;
 	cp.no_stdin = 1;
@@ -794,7 +790,7 @@
 unsigned is_submodule_modified(const char *path, int ignore_untracked)
 {
 	ssize_t len;
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	const char *argv[] = {
 		"status",
 		"--porcelain",
@@ -821,7 +817,6 @@
 	if (ignore_untracked)
 		argv[2] = "-uno";
 
-	memset(&cp, 0, sizeof(cp));
 	cp.argv = argv;
 	cp.env = local_repo_env;
 	cp.git_cmd = 1;
@@ -862,7 +857,7 @@
 
 int submodule_uses_gitfile(const char *path)
 {
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	const char *argv[] = {
 		"submodule",
 		"foreach",
@@ -883,7 +878,6 @@
 	strbuf_release(&buf);
 
 	/* Now test that all nested submodules use a gitfile too */
-	memset(&cp, 0, sizeof(cp));
 	cp.argv = argv;
 	cp.env = local_repo_env;
 	cp.git_cmd = 1;
@@ -901,7 +895,7 @@
 {
 	struct stat st;
 	ssize_t len;
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	const char *argv[] = {
 		"status",
 		"--porcelain",
@@ -918,7 +912,6 @@
 	if (!submodule_uses_gitfile(path))
 		return 0;
 
-	memset(&cp, 0, sizeof(cp));
 	cp.argv = argv;
 	cp.env = local_repo_env;
 	cp.git_cmd = 1;
diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh
index 39e55a1..8dc6939 100755
--- a/t/t0008-ignores.sh
+++ b/t/t0008-ignores.sh
@@ -806,7 +806,7 @@
 	test_cmp err.expect err
 '
 
-test_expect_success NOT_MINGW,NOT_CYGWIN 'correct handling of backslashes' '
+test_expect_success !MINGW,!CYGWIN 'correct handling of backslashes' '
 	rm -rf whitespace &&
 	mkdir whitespace &&
 	>"whitespace/trailing 1  " &&
diff --git a/t/t0026-eol-config.sh b/t/t0026-eol-config.sh
index 4807b0f..c5203e2 100755
--- a/t/t0026-eol-config.sh
+++ b/t/t0026-eol-config.sh
@@ -80,4 +80,24 @@
 	test -z "$onediff" && test -z "$twodiff"
 '
 
+test_expect_success NATIVE_CRLF 'eol native is crlf' '
+
+	rm -rf native_eol && mkdir native_eol &&
+	(
+		cd native_eol &&
+		printf "*.txt text\n" >.gitattributes &&
+		printf "one\r\ntwo\r\nthree\r\n" >filedos.txt &&
+		printf "one\ntwo\nthree\n" >fileunix.txt &&
+		git init &&
+		git config core.autocrlf false &&
+		git config core.eol native &&
+		git add filedos.txt fileunix.txt &&
+		git commit -m "first" &&
+		rm file*.txt &&
+		git reset --hard HEAD &&
+		has_cr filedos.txt &&
+		has_cr fileunix.txt
+	)
+'
+
 test_done
diff --git a/t/t0027-auto-crlf.sh b/t/t0027-auto-crlf.sh
index 72dd3e8..2a4a6c1 100755
--- a/t/t0027-auto-crlf.sh
+++ b/t/t0027-auto-crlf.sh
@@ -10,30 +10,26 @@
 	test_done
 fi
 
-
-compare_files()
-{
-	od -c <"$1" >"$1".expect &&
-	od -c <"$2" >"$2".actual &&
+compare_files () {
+	tr '\015\000' QN <"$1" >"$1".expect &&
+	tr '\015\000' QN <"$2" >"$2".actual &&
 	test_cmp "$1".expect "$2".actual &&
 	rm "$1".expect "$2".actual
 }
 
-compare_ws_file()
-{
+compare_ws_file () {
 	pfx=$1
 	exp=$2.expect
 	act=$pfx.actual.$3
-	od -c <"$2" >"$exp" &&
-	od -c <"$3" >"$act" &&
+	tr '\015\000' QN <"$2" >"$exp" &&
+	tr '\015\000' QN <"$3" >"$act" &&
 	test_cmp $exp $act &&
 	rm $exp $act
 }
 
-create_gitattributes()
-{
-	txtbin=$1
-	case "$txtbin" in
+create_gitattributes () {
+	attr=$1
+	case "$attr" in
 		auto)
 		echo "*.txt text=auto" >.gitattributes
 		;;
@@ -43,35 +39,43 @@
 		-text)
 		echo "*.txt -text" >.gitattributes
 		;;
-		*)
+		crlf)
+		echo "*.txt eol=crlf" >.gitattributes
+		;;
+		lf)
+		echo "*.txt eol=lf" >.gitattributes
+		;;
+		"")
 		echo >.gitattributes
 		;;
+		*)
+		echo >&2 invalid attribute: $attr
+		exit 1
+		;;
 	esac
 }
 
-create_file_in_repo()
-{
+create_file_in_repo () {
 	crlf=$1
-	txtbin=$2
-	create_gitattributes "$txtbin" &&
+	attr=$2
+	create_gitattributes "$attr" &&
 	for f in LF CRLF LF_mix_CR CRLF_mix_LF CRLF_nul
 	do
-		pfx=crlf_${crlf}_attr_${txtbin}_$f.txt &&
+		pfx=crlf_${crlf}_attr_${attr}_$f.txt &&
 		cp $f $pfx && git -c core.autocrlf=$crlf add $pfx
 	done &&
 	git commit -m "core.autocrlf $crlf"
 }
 
-check_files_in_repo()
-{
+check_files_in_repo () {
 	crlf=$1
-	txtbin=$2
+	attr=$2
 	lfname=$3
 	crlfname=$4
 	lfmixcrlf=$5
 	lfmixcr=$6
 	crlfnul=$7
-	pfx=crlf_${crlf}_attr_${txtbin}_ &&
+	pfx=crlf_${crlf}_attr_${attr}_ &&
 	compare_files $lfname ${pfx}LF.txt &&
 	compare_files $crlfname ${pfx}CRLF.txt &&
 	compare_files $lfmixcrlf ${pfx}CRLF_mix_LF.txt &&
@@ -80,19 +84,18 @@
 }
 
 
-check_files_in_ws()
-{
+check_files_in_ws () {
 	eol=$1
 	crlf=$2
-	txtbin=$3
+	attr=$3
 	lfname=$4
 	crlfname=$5
 	lfmixcrlf=$6
 	lfmixcr=$7
 	crlfnul=$8
-	create_gitattributes $txtbin &&
+	create_gitattributes $attr &&
 	git config core.autocrlf $crlf &&
-	pfx=eol_${eol}_crlf_${crlf}_attr_${txtbin}_ &&
+	pfx=eol_${eol}_crlf_${crlf}_attr_${attr}_ &&
 	src=crlf_false_attr__ &&
 	for f in LF CRLF LF_mix_CR CRLF_mix_LF CRLF_nul
 	do
@@ -104,42 +107,24 @@
 		fi
 	done
 
-
-	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$txtbin file=LF" "
+	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$attr file=LF" "
 		compare_ws_file $pfx $lfname    ${src}LF.txt
 	"
-	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$txtbin file=CRLF" "
+	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$attr file=CRLF" "
 		compare_ws_file $pfx $crlfname  ${src}CRLF.txt
 	"
-	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$txtbin file=CRLF_mix_LF" "
+	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$attr file=CRLF_mix_LF" "
 		compare_ws_file $pfx $lfmixcrlf ${src}CRLF_mix_LF.txt
 	"
-	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$txtbin file=LF_mix_CR" "
+	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$attr file=LF_mix_CR" "
 		compare_ws_file $pfx $lfmixcr   ${src}LF_mix_CR.txt
 	"
-	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$txtbin file=CRLF_nul" "
+	test_expect_success "checkout core.eol=$eol core.autocrlf=$crlf gitattributes=$attr file=CRLF_nul" "
 		compare_ws_file $pfx $crlfnul   ${src}CRLF_nul.txt
 	"
 }
 
 #######
-(
-	type od >/dev/null &&
-	printf "line1Q\r\nline2\r\nline3" | q_to_nul >CRLF_nul &&
-	cat >expect <<-EOF &&
-	0000000 l i n e 1 \0 \r \n l i n e 2 \r \n l
-	0000020 i n e 3
-	0000024
-EOF
-	od -c CRLF_nul | sed -e "s/[ 	][	 ]*/ /g" -e "s/ *$//" >actual
-	test_cmp expect actual &&
-	rm expect actual
-) || {
-		skip_all="od not found or od -c not usable"
-		exit 0
-		test_done
-}
-
 test_expect_success 'setup master' '
 	echo >.gitattributes &&
 	git checkout -b master &&
@@ -150,9 +135,10 @@
 	printf "line1\r\nline2\nline3"   >CRLF_mix_LF &&
 	printf "line1\nline2\rline3"     >LF_mix_CR &&
 	printf "line1\r\nline2\rline3"   >CRLF_mix_CR &&
+	printf "line1Q\r\nline2\r\nline3" | q_to_nul >CRLF_nul &&
 	printf "line1Q\nline2\nline3" | q_to_nul >LF_nul
 '
-#  CRLF_nul had been created above
+
 
 test_expect_success 'create files' '
 	create_file_in_repo false "" &&
@@ -201,7 +187,8 @@
 ################################################################################
 # Check how files in the repo are changed when they are checked out
 # How to read the table below:
-# - check_files_in_ws will check multiple files, see below
+# - check_files_in_ws will check multiple files with a combination of settings
+#   and attributes (core.autocrlf=input is forbidden with core.eol=crlf)
 # - parameter $1 : core.eol               lf | crlf
 # - parameter $2 : core.autocrlf          false | true | input
 # - parameter $3 : text in .gitattributs  "" (empty) | auto | text | -text
@@ -211,55 +198,88 @@
 # - parameter $7 : reference for a file with LF and CR in the repo (does somebody uses this ?)
 # - parameter $8 : reference for a file with CRLF and a NUL (should be handled as binary when auto)
 
-check_files_in_ws lf      false  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      true   ""       CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      input  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-check_files_in_ws lf      false "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
-check_files_in_ws lf      input "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-check_files_in_ws lf      false "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
-check_files_in_ws lf      input "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-check_files_in_ws lf      false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws lf      input "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-###########
-#core.autocrlf=input is forbidden with core.eol=crlf
-check_files_in_ws crlf    false ""        LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws crlf    true  ""        CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-check_files_in_ws crlf    false "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
-check_files_in_ws crlf    true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
-
-check_files_in_ws crlf    false "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
-check_files_in_ws crlf    true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
-
-check_files_in_ws crlf    false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws crlf    true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
+#                                            What we have in the repo:
+#                														 ----------------- EOL in repo ----------------
+#                														 LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+#                   settings with checkout:
+#                   core.   core.   .gitattr
+#                    eol     acrlf
+#                                            ----------------------------------------------
+#                                            What we want to have in the working tree:
 if test_have_prereq MINGW
 then
-check_files_in_ws ""      false ""        LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws ""      true  ""        CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws ""      false "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws ""      true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
-check_files_in_ws ""      false "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws ""      true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
-check_files_in_ws ""      false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws ""      true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-
-check_files_in_ws native  false ""        LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws native  true  ""        CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws native  false "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws native  true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
-check_files_in_ws native  false "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws native  true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
-check_files_in_ws native  false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
-check_files_in_ws native  true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+MIX_CRLF_LF=CRLF
+MIX_LF_CR=CRLF_mix_CR
+NL=CRLF
+else
+MIX_CRLF_LF=CRLF_mix_LF
+MIX_LF_CR=LF_mix_CR
+NL=LF
 fi
+export CRLF_MIX_LF_CR MIX NL
+
+check_files_in_ws    lf      false  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      true   ""       CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      input  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      false "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      input "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      false "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    lf      input "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      input "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      false "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      true  "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      input "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    lf      false "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    lf      true  "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    lf      input "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+
+check_files_in_ws    crlf    false  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    true   ""       CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    false "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    false "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    crlf    true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    crlf    false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    false "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    true  "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    crlf    false "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    crlf    true  "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+
+check_files_in_ws    ""      false  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      true   ""       CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      input  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      false "auto"    $NL   CRLF  $MIX_CRLF_LF LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      input "auto"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      false "text"    $NL   CRLF  $MIX_CRLF_LF $MIX_LF_CR   CRLF_nul
+check_files_in_ws    ""      true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    ""      input "text"    LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      input "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      false "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      true  "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      input "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    ""      false "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    ""      true  "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    ""      input "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+
+check_files_in_ws    native  false  ""       LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  true   ""       CRLF  CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  false "auto"    $NL   CRLF  $MIX_CRLF_LF LF_mix_CR    CRLF_nul
+check_files_in_ws    native  true  "auto"    CRLF  CRLF  CRLF         LF_mix_CR    CRLF_nul
+check_files_in_ws    native  false "text"    $NL   CRLF  $MIX_CRLF_LF $MIX_LF_CR   CRLF_nul
+check_files_in_ws    native  true  "text"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    native  false "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  true  "-text"   LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  false "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  true  "lf"      LF    CRLF  CRLF_mix_LF  LF_mix_CR    CRLF_nul
+check_files_in_ws    native  false "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
+check_files_in_ws    native  true  "crlf"    CRLF  CRLF  CRLF         CRLF_mix_CR  CRLF_nul
 
 test_done
diff --git a/t/t0081-line-buffer.sh b/t/t0081-line-buffer.sh
index 25dba00..ce92e6a 100755
--- a/t/t0081-line-buffer.sh
+++ b/t/t0081-line-buffer.sh
@@ -29,7 +29,7 @@
 	test_cmp expect actual
 '
 
-test_expect_success NOT_MINGW 'read from file descriptor' '
+test_expect_success !MINGW 'read from file descriptor' '
 	rm -f input &&
 	echo hello >expect &&
 	echo hello >input &&
diff --git a/t/t0090-cache-tree.sh b/t/t0090-cache-tree.sh
index 6c33e28..f9648a8 100755
--- a/t/t0090-cache-tree.sh
+++ b/t/t0090-cache-tree.sh
@@ -8,7 +8,7 @@
  . ./test-lib.sh
 
 cmp_cache_tree () {
-	test-dump-cache-tree >actual &&
+	test-dump-cache-tree | sed -e '/#(ref)/d' >actual &&
 	sed "s/$_x40/SHA/" <actual >filtered &&
 	test_cmp "$1" filtered
 }
@@ -16,15 +16,40 @@
 # We don't bother with actually checking the SHA1:
 # test-dump-cache-tree already verifies that all existing data is
 # correct.
-test_shallow_cache_tree () {
-	printf "SHA  (%d entries, 0 subtrees)\n" $(git ls-files|wc -l) >expect &&
+generate_expected_cache_tree_rec () {
+	dir="$1${1:+/}" &&
+	parent="$2" &&
+	# ls-files might have foo/bar, foo/bar/baz, and foo/bar/quux
+	# We want to count only foo because it's the only direct child
+	subtrees=$(git ls-files|grep /|cut -d / -f 1|uniq) &&
+	subtree_count=$(echo "$subtrees"|awk '$1 {++c} END {print c}') &&
+	entries=$(git ls-files|wc -l) &&
+	printf "SHA $dir (%d entries, %d subtrees)\n" "$entries" "$subtree_count" &&
+	for subtree in $subtrees
+	do
+		cd "$subtree"
+		generate_expected_cache_tree_rec "$dir$subtree" "$dir" || return 1
+		cd ..
+	done &&
+	dir=$parent
+}
+
+generate_expected_cache_tree () {
+	(
+		generate_expected_cache_tree_rec
+	)
+}
+
+test_cache_tree () {
+	generate_expected_cache_tree >expect &&
 	cmp_cache_tree expect
 }
 
 test_invalid_cache_tree () {
-	echo "invalid                                   (0 subtrees)" >expect &&
-	printf "SHA #(ref)  (%d entries, 0 subtrees)\n" $(git ls-files|wc -l) >>expect &&
-	cmp_cache_tree expect
+	printf "invalid                                  %s ()\n" "" "$@" >expect &&
+	test-dump-cache-tree |
+	sed -n -e "s/[0-9]* subtrees//" -e '/#(ref)/d' -e '/^invalid /p' >actual &&
+	test_cmp expect actual
 }
 
 test_no_cache_tree () {
@@ -32,26 +57,59 @@
 	cmp_cache_tree expect
 }
 
-test_expect_failure 'initial commit has cache-tree' '
+test_expect_success 'initial commit has cache-tree' '
 	test_commit foo &&
-	test_shallow_cache_tree
+	test_cache_tree
 '
 
 test_expect_success 'read-tree HEAD establishes cache-tree' '
 	git read-tree HEAD &&
-	test_shallow_cache_tree
+	test_cache_tree
 '
 
 test_expect_success 'git-add invalidates cache-tree' '
 	test_when_finished "git reset --hard; git read-tree HEAD" &&
-	echo "I changed this file" > foo &&
+	echo "I changed this file" >foo &&
 	git add foo &&
 	test_invalid_cache_tree
 '
 
+test_expect_success 'git-add in subdir invalidates cache-tree' '
+	test_when_finished "git reset --hard; git read-tree HEAD" &&
+	mkdir dirx &&
+	echo "I changed this file" >dirx/foo &&
+	git add dirx/foo &&
+	test_invalid_cache_tree
+'
+
+cat >before <<\EOF
+SHA  (3 entries, 2 subtrees)
+SHA dir1/ (1 entries, 0 subtrees)
+SHA dir2/ (1 entries, 0 subtrees)
+EOF
+
+cat >expect <<\EOF
+invalid                                   (2 subtrees)
+invalid                                  dir1/ (0 subtrees)
+SHA dir2/ (1 entries, 0 subtrees)
+EOF
+
+test_expect_success 'git-add in subdir does not invalidate sibling cache-tree' '
+	git tag no-children &&
+	test_when_finished "git reset --hard no-children; git read-tree HEAD" &&
+	mkdir dir1 dir2 &&
+	test_commit dir1/a &&
+	test_commit dir2/b &&
+	echo "I changed this file" >dir1/a &&
+	cmp_cache_tree before &&
+	echo "I changed this file" >dir1/a &&
+	git add dir1/a &&
+	cmp_cache_tree expect
+'
+
 test_expect_success 'update-index invalidates cache-tree' '
 	test_when_finished "git reset --hard; git read-tree HEAD" &&
-	echo "I changed this file" > foo &&
+	echo "I changed this file" >foo &&
 	git update-index --add foo &&
 	test_invalid_cache_tree
 '
@@ -59,7 +117,7 @@
 test_expect_success 'write-tree establishes cache-tree' '
 	test-scrap-cache-tree &&
 	git write-tree &&
-	test_shallow_cache_tree
+	test_cache_tree
 '
 
 test_expect_success 'test-scrap-cache-tree works' '
@@ -70,24 +128,94 @@
 
 test_expect_success 'second commit has cache-tree' '
 	test_commit bar &&
-	test_shallow_cache_tree
+	test_cache_tree
+'
+
+test_expect_success 'commit --interactive gives cache-tree on partial commit' '
+	cat <<-\EOT >foo.c &&
+	int foo()
+	{
+		return 42;
+	}
+	int bar()
+	{
+		return 42;
+	}
+	EOT
+	git add foo.c &&
+	test_invalid_cache_tree &&
+	git commit -m "add a file" &&
+	test_cache_tree &&
+	cat <<-\EOT >foo.c &&
+	int foo()
+	{
+		return 43;
+	}
+	int bar()
+	{
+		return 44;
+	}
+	EOT
+	(echo p; echo 1; echo; echo s; echo n; echo y; echo q) |
+	git commit --interactive -m foo &&
+	test_cache_tree
+'
+
+test_expect_success 'commit in child dir has cache-tree' '
+	mkdir dir &&
+	>dir/child.t &&
+	git add dir/child.t &&
+	git commit -m dir/child.t &&
+	test_cache_tree
 '
 
 test_expect_success 'reset --hard gives cache-tree' '
 	test-scrap-cache-tree &&
 	git reset --hard &&
-	test_shallow_cache_tree
+	test_cache_tree
 '
 
 test_expect_success 'reset --hard without index gives cache-tree' '
 	rm -f .git/index &&
 	git reset --hard &&
-	test_shallow_cache_tree
+	test_cache_tree
 '
 
-test_expect_failure 'checkout gives cache-tree' '
+test_expect_success 'checkout gives cache-tree' '
+	git tag current &&
 	git checkout HEAD^ &&
-	test_shallow_cache_tree
+	test_cache_tree
+'
+
+test_expect_success 'checkout -b gives cache-tree' '
+	git checkout current &&
+	git checkout -b prev HEAD^ &&
+	test_cache_tree
+'
+
+test_expect_success 'checkout -B gives cache-tree' '
+	git checkout current &&
+	git checkout -B prev HEAD^ &&
+	test_cache_tree
+'
+
+test_expect_success 'partial commit gives cache-tree' '
+	git checkout -b partial no-children &&
+	test_commit one &&
+	test_commit two &&
+	echo "some change" >one.t &&
+	git add one.t &&
+	echo "some other change" >two.t &&
+	git commit two.t -m partial &&
+	test_cache_tree
+'
+
+test_expect_success 'no phantom error when switching trees' '
+	mkdir newdir &&
+	>newdir/one &&
+	git add newdir/one &&
+	git checkout 2>errors &&
+	! test -s errors
 '
 
 test_done
diff --git a/t/t1020-subdirectory.sh b/t/t1020-subdirectory.sh
index 62c0d25..2edb4f2 100755
--- a/t/t1020-subdirectory.sh
+++ b/t/t1020-subdirectory.sh
@@ -118,7 +118,7 @@
 	)
 '
 
-test_expect_success NOT_MINGW '!alias expansion' '
+test_expect_success !MINGW '!alias expansion' '
 	pwd >expect &&
 	(
 		git config alias.test-alias-directory !pwd &&
diff --git a/t/t1050-large.sh b/t/t1050-large.sh
index aea4936..05a1e1d 100755
--- a/t/t1050-large.sh
+++ b/t/t1050-large.sh
@@ -112,6 +112,20 @@
 	git diff --raw HEAD^
 '
 
+test_expect_success 'diff --stat' '
+	git diff --stat HEAD^ HEAD
+'
+
+test_expect_success 'diff' '
+	git diff HEAD^ HEAD >actual &&
+	grep "Binary files.*differ" actual
+'
+
+test_expect_success 'diff --cached' '
+	git diff --cached HEAD^ >actual &&
+	grep "Binary files.*differ" actual
+'
+
 test_expect_success 'hash-object' '
 	git hash-object large1
 '
@@ -163,4 +177,10 @@
 	git archive --format=zip HEAD >/dev/null
 '
 
+test_expect_success 'fsck' '
+	test_must_fail git fsck 2>err &&
+	n=$(grep "error: attempting to allocate .* over limit" err | wc -l) &&
+	test "$n" -gt 1
+'
+
 test_done
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 3f80ff0..938fc8b 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -824,14 +824,14 @@
 	trailingtilde = foo~
 EOF
 
-test_expect_success NOT_MINGW 'set --path' '
+test_expect_success !MINGW 'set --path' '
 	rm -f .git/config &&
 	git config --path path.home "~/" &&
 	git config --path path.normal "/dev/null" &&
 	git config --path path.trailingtilde "foo~" &&
 	test_cmp expect .git/config'
 
-if test_have_prereq NOT_MINGW && test "${HOME+set}"
+if test_have_prereq !MINGW && test "${HOME+set}"
 then
 	test_set_prereq HOMEVAR
 fi
@@ -854,7 +854,7 @@
 foo~
 EOF
 
-test_expect_success NOT_MINGW 'get --path copes with unset $HOME' '
+test_expect_success !MINGW 'get --path copes with unset $HOME' '
 	(
 		unset HOME;
 		test_must_fail git config --get --path path.home \
@@ -1010,6 +1010,17 @@
 	test_must_fail git -c name=value config core.name
 '
 
+# We just need a type-specifier here that cares about the
+# distinction internally between a NULL boolean and a real
+# string (because most of git's internal parsers do care).
+# Using "--path" works, but we do not otherwise care about
+# its semantics.
+test_expect_success 'git -c can represent empty string' '
+	echo >expect &&
+	git -c foo.empty= config --path foo.empty >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'key sanity-checking' '
 	test_must_fail git config foo=bar &&
 	test_must_fail git config foo=.bar &&
diff --git a/t/t1308-config-set.sh b/t/t1308-config-set.sh
new file mode 100755
index 0000000..ea0bce2
--- /dev/null
+++ b/t/t1308-config-set.sh
@@ -0,0 +1,221 @@
+#!/bin/sh
+
+test_description='Test git config-set API in different settings'
+
+. ./test-lib.sh
+
+# 'check_config get_* section.key value' verifies that the entry for
+# section.key is 'value'
+check_config () {
+	if test "$1" = expect_code
+	then
+		expect_code="$2" && shift && shift
+	else
+		expect_code=0
+	fi &&
+	op=$1 key=$2 && shift && shift &&
+	if test $# != 0
+	then
+		printf "%s\n" "$@"
+	fi >expect &&
+	test_expect_code $expect_code test-config "$op" "$key" >actual &&
+	test_cmp expect actual
+}
+
+test_expect_success 'setup default config' '
+	cat >.git/config <<\EOF
+	[case]
+		penguin = very blue
+		Movie = BadPhysics
+		UPPERCASE = true
+		MixedCase = true
+		my =
+		foo
+		baz = sam
+	[Cores]
+		WhatEver = Second
+		baz = bar
+	[cores]
+		baz = bat
+	[CORES]
+		baz = ball
+	[my "Foo bAr"]
+		hi = mixed-case
+	[my "FOO BAR"]
+		hi = upper-case
+	[my "foo bar"]
+		hi = lower-case
+	[case]
+		baz = bat
+		baz = hask
+	[lamb]
+		chop = 65
+		head = none
+	[goat]
+		legs = 4
+		head = true
+		skin = false
+		nose = 1
+		horns
+	EOF
+'
+
+test_expect_success 'get value for a simple key' '
+	check_config get_value case.penguin "very blue"
+'
+
+test_expect_success 'get value for a key with value as an empty string' '
+	check_config get_value case.my ""
+'
+
+test_expect_success 'get value for a key with value as NULL' '
+	check_config get_value case.foo "(NULL)"
+'
+
+test_expect_success 'upper case key' '
+	check_config get_value case.UPPERCASE "true" &&
+	check_config get_value case.uppercase "true"
+'
+
+test_expect_success 'mixed case key' '
+	check_config get_value case.MixedCase "true" &&
+	check_config get_value case.MIXEDCASE "true" &&
+	check_config get_value case.mixedcase "true"
+'
+
+test_expect_success 'key and value with mixed case' '
+	check_config get_value case.Movie "BadPhysics"
+'
+
+test_expect_success 'key with case sensitive subsection' '
+	check_config get_value "my.Foo bAr.hi" "mixed-case" &&
+	check_config get_value "my.FOO BAR.hi" "upper-case" &&
+	check_config get_value "my.foo bar.hi" "lower-case"
+'
+
+test_expect_success 'key with case insensitive section header' '
+	check_config get_value cores.baz "ball" &&
+	check_config get_value Cores.baz "ball" &&
+	check_config get_value CORES.baz "ball" &&
+	check_config get_value coreS.baz "ball"
+'
+
+test_expect_success 'key with case insensitive section header & variable' '
+	check_config get_value CORES.BAZ "ball" &&
+	check_config get_value cores.baz "ball" &&
+	check_config get_value cores.BaZ "ball" &&
+	check_config get_value cOreS.bAz "ball"
+'
+
+test_expect_success 'find value with misspelled key' '
+	check_config expect_code 1 get_value "my.fOo Bar.hi" "Value not found for \"my.fOo Bar.hi\""
+'
+
+test_expect_success 'find value with the highest priority' '
+	check_config get_value case.baz "hask"
+'
+
+test_expect_success 'find integer value for a key' '
+	check_config get_int lamb.chop 65
+'
+
+test_expect_success 'find string value for a key' '
+	check_config get_string case.baz hask &&
+	check_config expect_code 1 get_string case.ba "Value not found for \"case.ba\""
+'
+
+test_expect_success 'check line error when NULL string is queried' '
+	test_expect_code 128 test-config get_string case.foo 2>result &&
+	test_i18ngrep "fatal: .*case\.foo.*\.git/config.*line 7" result
+'
+
+test_expect_success 'find integer if value is non parse-able' '
+	check_config expect_code 128 get_int lamb.head
+'
+
+test_expect_success 'find bool value for the entered key' '
+	check_config get_bool goat.head 1 &&
+	check_config get_bool goat.skin 0 &&
+	check_config get_bool goat.nose 1 &&
+	check_config get_bool goat.horns 1 &&
+	check_config get_bool goat.legs 1
+'
+
+test_expect_success 'find multiple values' '
+	check_config get_value_multi case.baz sam bat hask
+'
+
+test_expect_success 'find value from a configset' '
+	cat >config2 <<-\EOF &&
+	[case]
+		baz = lama
+	[my]
+		new = silk
+	[case]
+		baz = ball
+	EOF
+	echo silk >expect &&
+	test-config configset_get_value my.new config2 .git/config >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'find value with highest priority from a configset' '
+	echo hask >expect &&
+	test-config configset_get_value case.baz config2 .git/config >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'find value_list for a key from a configset' '
+	cat >except <<-\EOF &&
+	sam
+	bat
+	hask
+	lama
+	ball
+	EOF
+	test-config configset_get_value case.baz config2 .git/config >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'proper error on non-existent files' '
+	echo "Error (-1) reading configuration file non-existent-file." >expect &&
+	test_expect_code 2 test-config configset_get_value foo.bar non-existent-file 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success POSIXPERM,SANITY 'proper error on non-accessible files' '
+	chmod -r .git/config &&
+	test_when_finished "chmod +r .git/config" &&
+	echo "Error (-1) reading configuration file .git/config." >expect &&
+	test_expect_code 2 test-config configset_get_value foo.bar .git/config 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'proper error on error in default config files' '
+	cp .git/config .git/config.old &&
+	test_when_finished "mv .git/config.old .git/config" &&
+	echo "[" >>.git/config &&
+	echo "fatal: bad config file line 35 in .git/config" >expect &&
+	test_expect_code 128 test-config get_value foo.bar 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'proper error on error in custom config files' '
+	echo "[" >>syntax-error &&
+	echo "fatal: bad config file line 1 in syntax-error" >expect &&
+	test_expect_code 128 test-config configset_get_value foo.bar syntax-error 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'check line errors for malformed values' '
+	mv .git/config .git/config.old &&
+	test_when_finished "mv .git/config.old .git/config" &&
+	cat >.git/config <<-\EOF &&
+	[alias]
+		br
+	EOF
+	test_expect_code 128 git br 2>result &&
+	test_i18ngrep "fatal: .*alias\.br.*\.git/config.*line 2" result
+'
+
+test_done
diff --git a/t/t1402-check-ref-format.sh b/t/t1402-check-ref-format.sh
index 4bc7141..e5dc62e 100755
--- a/t/t1402-check-ref-format.sh
+++ b/t/t1402-check-ref-format.sh
@@ -7,7 +7,7 @@
 valid_ref() {
 	prereq=
 	case $1 in
-	[A-Z]*)
+	[A-Z!]*)
 		prereq=$1
 		shift
 	esac
@@ -19,7 +19,7 @@
 invalid_ref() {
 	prereq=
 	case $1 in
-	[A-Z]*)
+	[A-Z!]*)
 		prereq=$1
 		shift
 	esac
@@ -30,17 +30,17 @@
 }
 
 invalid_ref ''
-invalid_ref NOT_MINGW '/'
-invalid_ref NOT_MINGW '/' --allow-onelevel
-invalid_ref NOT_MINGW '/' --normalize
-invalid_ref NOT_MINGW '/' '--allow-onelevel --normalize'
+invalid_ref !MINGW '/'
+invalid_ref !MINGW '/' --allow-onelevel
+invalid_ref !MINGW '/' --normalize
+invalid_ref !MINGW '/' '--allow-onelevel --normalize'
 valid_ref 'foo/bar/baz'
 valid_ref 'foo/bar/baz' --normalize
 invalid_ref 'refs///heads/foo'
 valid_ref 'refs///heads/foo' --normalize
 invalid_ref 'heads/foo/'
-invalid_ref NOT_MINGW '/heads/foo'
-valid_ref NOT_MINGW '/heads/foo' --normalize
+invalid_ref !MINGW '/heads/foo'
+valid_ref !MINGW '/heads/foo' --normalize
 invalid_ref '///heads/foo'
 valid_ref '///heads/foo' --normalize
 invalid_ref './foo'
@@ -120,14 +120,14 @@
 invalid_ref "$ref" '--refspec-pattern --allow-onelevel'
 
 ref='/foo'
-invalid_ref NOT_MINGW "$ref"
-invalid_ref NOT_MINGW "$ref" --allow-onelevel
-invalid_ref NOT_MINGW "$ref" --refspec-pattern
-invalid_ref NOT_MINGW "$ref" '--refspec-pattern --allow-onelevel'
-invalid_ref NOT_MINGW "$ref" --normalize
-valid_ref NOT_MINGW "$ref" '--allow-onelevel --normalize'
-invalid_ref NOT_MINGW "$ref" '--refspec-pattern --normalize'
-valid_ref NOT_MINGW "$ref" '--refspec-pattern --allow-onelevel --normalize'
+invalid_ref !MINGW "$ref"
+invalid_ref !MINGW "$ref" --allow-onelevel
+invalid_ref !MINGW "$ref" --refspec-pattern
+invalid_ref !MINGW "$ref" '--refspec-pattern --allow-onelevel'
+invalid_ref !MINGW "$ref" --normalize
+valid_ref !MINGW "$ref" '--allow-onelevel --normalize'
+invalid_ref !MINGW "$ref" '--refspec-pattern --normalize'
+valid_ref !MINGW "$ref" '--refspec-pattern --allow-onelevel --normalize'
 
 test_expect_success "check-ref-format --branch @{-1}" '
 	T=$(git write-tree) &&
@@ -162,7 +162,7 @@
 valid_ref_normalized() {
 	prereq=
 	case $1 in
-	[A-Z]*)
+	[A-Z!]*)
 		prereq=$1
 		shift
 	esac
@@ -174,7 +174,7 @@
 invalid_ref_normalized() {
 	prereq=
 	case $1 in
-	[A-Z]*)
+	[A-Z!]*)
 		prereq=$1
 		shift
 	esac
@@ -185,10 +185,10 @@
 
 valid_ref_normalized 'heads/foo' 'heads/foo'
 valid_ref_normalized 'refs///heads/foo' 'refs/heads/foo'
-valid_ref_normalized NOT_MINGW '/heads/foo' 'heads/foo'
+valid_ref_normalized !MINGW '/heads/foo' 'heads/foo'
 valid_ref_normalized '///heads/foo' 'heads/foo'
 invalid_ref_normalized 'foo'
-invalid_ref_normalized NOT_MINGW '/foo'
+invalid_ref_normalized !MINGW '/foo'
 invalid_ref_normalized 'heads/foo/../bar'
 invalid_ref_normalized 'heads/./foo'
 invalid_ref_normalized 'heads\foo'
diff --git a/t/t3210-pack-refs.sh b/t/t3210-pack-refs.sh
index 1a2080e..3a017bf 100755
--- a/t/t3210-pack-refs.sh
+++ b/t/t3210-pack-refs.sh
@@ -151,4 +151,11 @@
 	test_cmp /dev/null result
 '
 
+test_expect_success 'pack ref directly below refs/' '
+	git update-ref refs/top HEAD &&
+	git pack-refs --all --prune &&
+	grep refs/top .git/packed-refs &&
+	test_path_is_missing .git/refs/top
+'
+
 test_done
diff --git a/t/t3901-i18n-patch.sh b/t/t3901-i18n-patch.sh
index 55c8a2f..a392f3d 100755
--- a/t/t3901-i18n-patch.sh
+++ b/t/t3901-i18n-patch.sh
@@ -54,7 +54,7 @@
 	git add yours &&
 	git commit -s -m "Second on side" &&
 
-	if test_have_prereq NOT_MINGW
+	if test_have_prereq !MINGW
 	then
 		# the second one on the side branch is ISO-8859-1
 		git config i18n.commitencoding ISO8859-1 &&
@@ -122,7 +122,7 @@
 	check_encoding 2
 '
 
-test_expect_success NOT_MINGW 'rebase (L/L)' '
+test_expect_success !MINGW 'rebase (L/L)' '
 	# In this test we want ISO-8859-1 encoded commits as the result
 	git config i18n.commitencoding ISO8859-1 &&
 	git config i18n.logoutputencoding ISO8859-1 &&
@@ -134,7 +134,7 @@
 	check_encoding 2 8859
 '
 
-test_expect_success NOT_MINGW 'rebase (L/U)' '
+test_expect_success !MINGW 'rebase (L/U)' '
 	# This is pathological -- use UTF-8 as intermediate form
 	# to get ISO-8859-1 results.
 	git config i18n.commitencoding ISO8859-1 &&
@@ -162,7 +162,7 @@
 	check_encoding 3
 '
 
-test_expect_success NOT_MINGW 'cherry-pick(L/L)' '
+test_expect_success !MINGW 'cherry-pick(L/L)' '
 	# Both the commitencoding and logoutputencoding is set to ISO-8859-1
 
 	git config i18n.commitencoding ISO8859-1 &&
@@ -192,7 +192,7 @@
 	check_encoding 3
 '
 
-test_expect_success NOT_MINGW 'cherry-pick(L/U)' '
+test_expect_success !MINGW 'cherry-pick(L/U)' '
 	# Again, the commitencoding is set to ISO-8859-1 but
 	# logoutputencoding is set to UTF-8.
 
diff --git a/t/t3903-stash.sh b/t/t3903-stash.sh
index 5b79b21..1e29962 100755
--- a/t/t3903-stash.sh
+++ b/t/t3903-stash.sh
@@ -685,4 +685,46 @@
 	grep pig file
 '
 
+test_expect_success 'setup stash with index and worktree changes' '
+	git stash clear &&
+	git reset --hard &&
+	echo index >file &&
+	git add file &&
+	echo working >file &&
+	git stash
+'
+
+test_expect_success 'stash list implies --first-parent -m' '
+	cat >expect <<-\EOF &&
+	stash@{0}: WIP on master: b27a2bc subdir
+
+	diff --git a/file b/file
+	index 257cc56..d26b33d 100644
+	--- a/file
+	+++ b/file
+	@@ -1 +1 @@
+	-foo
+	+working
+	EOF
+	git stash list -p >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'stash list --cc shows combined diff' '
+	cat >expect <<-\EOF &&
+	stash@{0}: WIP on master: b27a2bc subdir
+
+	diff --cc file
+	index 257cc56,9015a7a..d26b33d
+	--- a/file
+	+++ b/file
+	@@@ -1,1 -1,1 +1,1 @@@
+	- foo
+	 -index
+	++working
+	EOF
+	git stash list -p --cc >actual &&
+	test_cmp expect actual
+'
+
 test_done
diff --git a/t/t4055-diff-context.sh b/t/t4055-diff-context.sh
index cd04543..741e080 100755
--- a/t/t4055-diff-context.sh
+++ b/t/t4055-diff-context.sh
@@ -79,7 +79,7 @@
 test_expect_success 'negative integer config parsing' '
 	git config diff.context -1 &&
 	test_must_fail git diff 2>output &&
-	test_i18ngrep "bad config file" output
+	test_i18ngrep "bad config variable" output
 '
 
 test_expect_success '-U0 is valid, so is diff.context=0' '
diff --git a/t/t4119-apply-config.sh b/t/t4119-apply-config.sh
index c393be6..a9a0583 100755
--- a/t/t4119-apply-config.sh
+++ b/t/t4119-apply-config.sh
@@ -159,4 +159,21 @@
 	check_result sub/file1
 '
 
+test_expect_success 'in subdir with traditional patch input' '
+	cd "$D" &&
+	git config apply.whitespace strip &&
+	cat >.gitattributes <<-EOF &&
+	/* whitespace=blank-at-eol
+	sub/* whitespace=-blank-at-eol
+	EOF
+	rm -f sub/file1 &&
+	cp saved sub/file1 &&
+	git update-index --refresh &&
+
+	cd sub &&
+	git apply ../gpatch.file &&
+	echo "B " >expect &&
+	test_cmp expect file1
+'
+
 test_done
diff --git a/t/t4124-apply-ws-rule.sh b/t/t4124-apply-ws-rule.sh
index 5d0c598..c6474de 100755
--- a/t/t4124-apply-ws-rule.sh
+++ b/t/t4124-apply-ws-rule.sh
@@ -512,4 +512,15 @@
 	git -c core.whitespace=tab-in-indent apply --whitespace=fix patch
 '
 
+test_expect_success 'whitespace check skipped for excluded paths' '
+	git config core.whitespace blank-at-eol &&
+	>used &&
+	>unused &&
+	git add used unused &&
+	echo "used" >used &&
+	echo "unused " >unused &&
+	git diff-files -p used unused >patch &&
+	git apply --include=used --stat --whitespace=error <patch
+'
+
 test_done
diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index 565c020..7600a3e 100755
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@@ -93,7 +93,7 @@
 	test_cmp expect log.predictable
 '
 
-test_expect_success NOT_MINGW 'shortlog wrapping' '
+test_expect_success !MINGW 'shortlog wrapping' '
 	cat >expect <<\EOF &&
 A U Thor (5):
       Test
@@ -114,7 +114,7 @@
 	test_cmp expect out
 '
 
-test_expect_success NOT_MINGW 'shortlog from non-git directory' '
+test_expect_success !MINGW 'shortlog from non-git directory' '
 	git log HEAD >log &&
 	GIT_DIR=non-existing git shortlog -w <log >out &&
 	test_cmp expect out
@@ -159,7 +159,7 @@
 
 EOF
 
-test_expect_success NOT_MINGW 'shortlog encoding' '
+test_expect_success !MINGW 'shortlog encoding' '
 	git reset --hard "$commit" &&
 	git config --unset i18n.commitencoding &&
 	echo 2 > a1 &&
diff --git a/t/t4205-log-pretty-formats.sh b/t/t4205-log-pretty-formats.sh
index 349c531..9b75399 100755
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@@ -431,6 +431,21 @@
 	test_cmp expected actual
 '
 
+test_expect_success 'strbuf_utf8_replace() not producing NUL' '
+	git log --color --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)%C(auto)%d" |
+		test_decode_color |
+		nul_to_q >actual &&
+	! grep Q actual
+'
+
+# ISO strict date format
+test_expect_success 'ISO and ISO-strict date formats display the same values' '
+	git log --format=%ai%n%ci |
+	sed -e "s/ /T/; s/ //; s/..\$/:&/" >expected &&
+	git log --format=%aI%n%cI >actual &&
+	test_cmp expected actual
+'
+
 # get new digests (with no abbreviations)
 head1=$(git rev-parse --verify HEAD~0) &&
 head2=$(git rev-parse --verify HEAD~1) &&
diff --git a/t/t4210-log-i18n.sh b/t/t4210-log-i18n.sh
index 9110404..e585fe6 100755
--- a/t/t4210-log-i18n.sh
+++ b/t/t4210-log-i18n.sh
@@ -34,7 +34,7 @@
 	test_cmp expect actual
 '
 
-test_expect_success NOT_MINGW 'log --grep searches in log output encoding (latin1)' '
+test_expect_success !MINGW 'log --grep searches in log output encoding (latin1)' '
 	cat >expect <<-\EOF &&
 	latin1
 	utf8
@@ -43,7 +43,7 @@
 	test_cmp expect actual
 '
 
-test_expect_success NOT_MINGW 'log --grep does not find non-reencoded values (utf8)' '
+test_expect_success !MINGW 'log --grep does not find non-reencoded values (utf8)' '
 	>expect &&
 	git log --encoding=utf8 --format=%s --grep=$latin1_e >actual &&
 	test_cmp expect actual
diff --git a/t/t5004-archive-corner-cases.sh b/t/t5004-archive-corner-cases.sh
index 305bcac..83d20c4 100755
--- a/t/t5004-archive-corner-cases.sh
+++ b/t/t5004-archive-corner-cases.sh
@@ -113,4 +113,9 @@
 	check_dir extract sub
 '
 
+test_expect_success 'archive applies umask even for pax headers' '
+	git archive --format=tar HEAD >archive.tar &&
+	! grep 0666 archive.tar
+'
+
 test_done
diff --git a/t/t5408-send-pack-stdin.sh b/t/t5408-send-pack-stdin.sh
new file mode 100755
index 0000000..e8737df
--- /dev/null
+++ b/t/t5408-send-pack-stdin.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+test_description='send-pack --stdin tests'
+. ./test-lib.sh
+
+create_ref () {
+	tree=$(git write-tree) &&
+	test_tick &&
+	commit=$(echo "$1" | git commit-tree $tree) &&
+	git update-ref "$1" $commit
+}
+
+clear_remote () {
+	rm -rf remote.git &&
+	git init --bare remote.git
+}
+
+verify_push () {
+	git rev-parse "$1" >expect &&
+	git --git-dir=remote.git rev-parse "${2:-$1}" >actual &&
+	test_cmp expect actual
+}
+
+test_expect_success 'setup refs' '
+	cat >refs <<-\EOF &&
+	refs/heads/A
+	refs/heads/C
+	refs/tags/D
+	refs/heads/B
+	refs/tags/E
+	EOF
+	for i in $(cat refs); do
+		create_ref $i || return 1
+	done
+'
+
+# sanity check our setup
+test_expect_success 'refs on cmdline' '
+	clear_remote &&
+	git send-pack remote.git $(cat refs) &&
+	for i in $(cat refs); do
+		verify_push $i || return 1
+	done
+'
+
+test_expect_success 'refs over stdin' '
+	clear_remote &&
+	git send-pack remote.git --stdin <refs &&
+	for i in $(cat refs); do
+		verify_push $i || return 1
+	done
+'
+
+test_expect_success 'stdin lines are full refspecs' '
+	clear_remote &&
+	echo "A:other" >input &&
+	git send-pack remote.git --stdin <input &&
+	verify_push refs/heads/A refs/heads/other
+'
+
+test_expect_success 'stdin mixed with cmdline' '
+	clear_remote &&
+	echo A >input &&
+	git send-pack remote.git --stdin B <input &&
+	verify_push A &&
+	verify_push B
+'
+
+test_expect_success 'cmdline refs written in order' '
+	clear_remote &&
+	test_must_fail git send-pack remote.git A:foo B:foo &&
+	verify_push A foo
+'
+
+test_expect_success '--stdin refs come after cmdline' '
+	clear_remote &&
+	echo A:foo >input &&
+	test_must_fail git send-pack remote.git --stdin B:foo <input &&
+	verify_push B foo
+'
+
+test_expect_success 'refspecs and --mirror do not mix (cmdline)' '
+	clear_remote &&
+	test_must_fail git send-pack remote.git --mirror $(cat refs)
+'
+
+test_expect_success 'refspecs and --mirror do not mix (stdin)' '
+	clear_remote &&
+	test_must_fail git send-pack remote.git --mirror --stdin <refs
+'
+
+test_done
diff --git a/t/t5541-http-push-smart.sh b/t/t5541-http-push-smart.sh
index 73af16f..db19988 100755
--- a/t/t5541-http-push-smart.sh
+++ b/t/t5541-http-push-smart.sh
@@ -323,5 +323,20 @@
 	test_cmp expect actual
 '
 
+run_with_limited_cmdline () {
+	(ulimit -s 128 && "$@")
+}
+
+test_lazy_prereq CMDLINE_LIMIT 'run_with_limited_cmdline true'
+
+test_expect_success CMDLINE_LIMIT 'push 2000 tags over http' '
+	sha1=$(git rev-parse HEAD) &&
+	test_seq 2000 |
+	  sort |
+	  sed "s|.*|$sha1 refs/tags/really-long-tag-name-&|" \
+	  >.git/packed-refs &&
+	run_with_limited_cmdline git push --mirror
+'
+
 stop_httpd
 test_done
diff --git a/t/t5601-clone.sh b/t/t5601-clone.sh
index 5e67035..e4f10c0 100755
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -318,7 +318,7 @@
 	expect_ssh myhost src
 '
 
-test_expect_success NOT_MINGW,NOT_CYGWIN 'clone local path foo:bar' '
+test_expect_success !MINGW,!CYGWIN 'clone local path foo:bar' '
 	cp -R src "foo:bar" &&
 	git clone "foo:bar" foobar &&
 	expect_ssh none
@@ -339,7 +339,7 @@
 	expect_ssh "$2" "$3"
 }
 
-test_expect_success NOT_MINGW 'clone c:temp is ssl' '
+test_expect_success !MINGW 'clone c:temp is ssl' '
 	test_clone_url c:temp c temp
 '
 
diff --git a/t/t5704-bundle.sh b/t/t5704-bundle.sh
index a45c316..348d9b3 100755
--- a/t/t5704-bundle.sh
+++ b/t/t5704-bundle.sh
@@ -14,7 +14,10 @@
 	git tag -d third
 '
 
-test_expect_success 'tags can be excluded by rev-list options' '
+test_expect_success 'annotated tags can be excluded by rev-list options' '
+	git bundle create bundle --all --since=7.Apr.2005.15:14:00.-0700 &&
+	git ls-remote bundle > output &&
+	grep tag output &&
 	git bundle create bundle --all --since=7.Apr.2005.15:16:00.-0700 &&
 	git ls-remote bundle > output &&
 	! grep tag output
diff --git a/t/t6038-merge-text-auto.sh b/t/t6038-merge-text-auto.sh
index d9c2d38..85c10b0 100755
--- a/t/t6038-merge-text-auto.sh
+++ b/t/t6038-merge-text-auto.sh
@@ -72,6 +72,10 @@
 	same line
 	EOF
 
+	if test_have_prereq NATIVE_CRLF; then
+		append_cr <expected >expected.temp &&
+		mv expected.temp expected
+	fi &&
 	git config merge.renormalize true &&
 	git rm -fr . &&
 	rm -f .gitattributes &&
@@ -86,6 +90,10 @@
 	same line
 	EOF
 
+	if test_have_prereq NATIVE_CRLF; then
+		append_cr <expected >expected.temp &&
+		mv expected.temp expected
+	fi &&
 	git config merge.renormalize true &&
 	git rm -fr . &&
 	rm -f .gitattributes &&
@@ -95,16 +103,19 @@
 '
 
 test_expect_success 'Detect CRLF/LF conflict after setting text=auto' '
-	q_to_cr <<-\EOF >expected &&
-	<<<<<<<
-	first line
-	same line
-	=======
-	first lineQ
-	same lineQ
-	>>>>>>>
-	EOF
-
+	echo "<<<<<<<" >expected &&
+	if test_have_prereq NATIVE_CRLF; then
+		echo first line | append_cr >>expected &&
+		echo same line | append_cr >>expected &&
+		echo ======= | append_cr >>expected
+	else
+		echo first line >>expected &&
+		echo same line >>expected &&
+		echo ======= >>expected
+	fi &&
+	echo first line | append_cr >>expected &&
+	echo same line | append_cr >>expected &&
+	echo ">>>>>>>" >>expected &&
 	git config merge.renormalize false &&
 	rm -f .gitattributes &&
 	git reset --hard a &&
@@ -114,16 +125,19 @@
 '
 
 test_expect_success 'Detect LF/CRLF conflict from addition of text=auto' '
-	q_to_cr <<-\EOF >expected &&
-	<<<<<<<
-	first lineQ
-	same lineQ
-	=======
-	first line
-	same line
-	>>>>>>>
-	EOF
-
+	echo "<<<<<<<" >expected &&
+	echo first line | append_cr >>expected &&
+	echo same line | append_cr >>expected &&
+	if test_have_prereq NATIVE_CRLF; then
+		echo ======= | append_cr >>expected &&
+		echo first line | append_cr >>expected &&
+		echo same line | append_cr >>expected
+	else
+		echo ======= >>expected &&
+		echo first line >>expected &&
+		echo same line >>expected
+	fi &&
+	echo ">>>>>>>" >>expected &&
 	git config merge.renormalize false &&
 	rm -f .gitattributes &&
 	git reset --hard b &&
diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 0c9ec0a..eae9e5a 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -223,6 +223,23 @@
 	test_cmp two expect
 '
 
+test_expect_success 'switch to another branch while carrying a deletion' '
+
+	git checkout -f master && git reset --hard && git clean -f &&
+	git rm two &&
+
+	test_must_fail git checkout simple 2>errs &&
+	test_i18ngrep overwritten errs &&
+
+	git checkout --merge simple 2>errs &&
+	test_i18ngrep ! overwritten errs &&
+	git ls-files -u &&
+	test_must_fail git cat-file -t :0:two &&
+	test "$(git cat-file -t :1:two)" = blob &&
+	test "$(git cat-file -t :2:two)" = blob &&
+	test_must_fail git cat-file -t :3:two
+'
+
 test_expect_success 'checkout to detach HEAD (with advice declined)' '
 
 	git config advice.detachedHead false &&
diff --git a/t/t7515-status-symlinks.sh b/t/t7515-status-symlinks.sh
new file mode 100755
index 0000000..9f989be
--- /dev/null
+++ b/t/t7515-status-symlinks.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+test_description='git status and symlinks'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	echo .gitignore >.gitignore &&
+	echo actual >>.gitignore &&
+	echo expect >>.gitignore &&
+	mkdir dir &&
+	echo x >dir/file1 &&
+	echo y >dir/file2 &&
+	git add dir &&
+	git commit -m initial &&
+	git tag initial
+'
+
+test_expect_success SYMLINKS 'symlink to a directory' '
+	test_when_finished "rm symlink" &&
+	ln -s dir symlink &&
+	echo "?? symlink" >expect &&
+	git status --porcelain >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success SYMLINKS 'symlink replacing a directory' '
+	test_when_finished "rm -rf copy && git reset --hard initial" &&
+	mkdir copy &&
+	cp dir/file1 copy/file1 &&
+	echo "changed in copy" >copy/file2 &&
+	git add copy &&
+	git commit -m second &&
+	rm -rf copy &&
+	ln -s dir copy &&
+	echo " D copy/file1" >expect &&
+	echo " D copy/file2" >>expect &&
+	echo "?? copy" >>expect &&
+	git status --porcelain >actual &&
+	test_cmp expect actual
+'
+
+test_done
diff --git a/t/t8005-blame-i18n.sh b/t/t8005-blame-i18n.sh
index a6e73d0..847d098 100755
--- a/t/t8005-blame-i18n.sh
+++ b/t/t8005-blame-i18n.sh
@@ -33,7 +33,7 @@
 summary $SJIS_MSG
 EOF
 
-test_expect_success NOT_MINGW \
+test_expect_success !MINGW \
 	'blame respects i18n.commitencoding' '
 	git blame --incremental file | \
 		egrep "^(author|summary) " > actual &&
@@ -49,7 +49,7 @@
 summary $EUC_JAPAN_MSG
 EOF
 
-test_expect_success NOT_MINGW \
+test_expect_success !MINGW \
 	'blame respects i18n.logoutputencoding' '
 	git config i18n.logoutputencoding eucJP &&
 	git blame --incremental file | \
@@ -66,7 +66,7 @@
 summary $UTF8_MSG
 EOF
 
-test_expect_success NOT_MINGW \
+test_expect_success !MINGW \
 	'blame respects --encoding=UTF-8' '
 	git blame --incremental --encoding=UTF-8 file | \
 		egrep "^(author|summary) " > actual &&
@@ -82,7 +82,7 @@
 summary $UTF8_MSG
 EOF
 
-test_expect_success NOT_MINGW \
+test_expect_success !MINGW \
 	'blame respects --encoding=none' '
 	git blame --incremental --encoding=none file | \
 		egrep "^(author|summary) " > actual &&
diff --git a/t/t9119-git-svn-info.sh b/t/t9119-git-svn-info.sh
index ff19695..f16f323 100755
--- a/t/t9119-git-svn-info.sh
+++ b/t/t9119-git-svn-info.sh
@@ -74,6 +74,36 @@
 	test_cmp_info expected.info-dot actual.info-dot
 	"
 
+test_expect_success 'info $(pwd)' '
+	(cd svnwc; svn info "$(pwd)") >expected.info-pwd &&
+	(cd gitwc; git svn info "$(pwd)") >actual.info-pwd &&
+	grep -v ^Path: <expected.info-pwd >expected.info-np &&
+	grep -v ^Path: <actual.info-pwd >actual.info-np &&
+	test_cmp_info expected.info-np actual.info-np &&
+	test "$(sed -ne \"/^Path:/ s!/svnwc!!\" <expected.info-pwd)" = \
+	     "$(sed -ne \"/^Path:/ s!/gitwc!!\" <actual.info-pwd)"
+	'
+
+test_expect_success 'info $(pwd)/../___wc' '
+	(cd svnwc; svn info "$(pwd)/../svnwc") >expected.info-pwd &&
+	(cd gitwc; git svn info "$(pwd)/../gitwc") >actual.info-pwd &&
+	grep -v ^Path: <expected.info-pwd >expected.info-np &&
+	grep -v ^Path: <actual.info-pwd >actual.info-np &&
+	test_cmp_info expected.info-np actual.info-np &&
+	test "$(sed -ne \"/^Path:/ s!/svnwc!!\" <expected.info-pwd)" = \
+	     "$(sed -ne \"/^Path:/ s!/gitwc!!\" <actual.info-pwd)"
+	'
+
+test_expect_success 'info $(pwd)/../___wc//file' '
+	(cd svnwc; svn info "$(pwd)/../svnwc//file") >expected.info-pwd &&
+	(cd gitwc; git svn info "$(pwd)/../gitwc//file") >actual.info-pwd &&
+	grep -v ^Path: <expected.info-pwd >expected.info-np &&
+	grep -v ^Path: <actual.info-pwd >actual.info-np &&
+	test_cmp_info expected.info-np actual.info-np &&
+	test "$(sed -ne \"/^Path:/ s!/svnwc!!\" <expected.info-pwd)" = \
+	     "$(sed -ne \"/^Path:/ s!/gitwc!!\" <actual.info-pwd)"
+	'
+
 test_expect_success 'info --url .' '
 	test "$(cd gitwc; git svn info --url .)" = "$quoted_svnrepo"
 	'
diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 5fc9ef2..60ef3a7 100755
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -2336,7 +2336,7 @@
 	test_must_fail git fast-import --cat-blob-fd=-1 </dev/null
 '
 
-test_expect_success NOT_MINGW 'R: print old blob' '
+test_expect_success !MINGW 'R: print old blob' '
 	blob=$(echo "yes it can" | git hash-object -w --stdin) &&
 	cat >expect <<-EOF &&
 	${blob} blob 11
@@ -2348,7 +2348,7 @@
 	test_cmp expect actual
 '
 
-test_expect_success NOT_MINGW 'R: in-stream cat-blob-fd not respected' '
+test_expect_success !MINGW 'R: in-stream cat-blob-fd not respected' '
 	echo hello >greeting &&
 	blob=$(git hash-object -w greeting) &&
 	cat >expect <<-EOF &&
@@ -2369,7 +2369,7 @@
 	test_cmp expect actual.1
 '
 
-test_expect_success NOT_MINGW 'R: print new blob' '
+test_expect_success !MINGW 'R: print new blob' '
 	blob=$(echo "yep yep yep" | git hash-object --stdin) &&
 	cat >expect <<-EOF &&
 	${blob} blob 12
@@ -2387,7 +2387,7 @@
 	test_cmp expect actual
 '
 
-test_expect_success NOT_MINGW 'R: print new blob by sha1' '
+test_expect_success !MINGW 'R: print new blob by sha1' '
 	blob=$(echo "a new blob named by sha1" | git hash-object --stdin) &&
 	cat >expect <<-EOF &&
 	${blob} blob 25
@@ -3017,4 +3017,108 @@
 	git rev-parse --verify refs/heads/not-to-delete
 '
 
+###
+### series U (filedelete)
+###
+
+cat >input <<INPUT_END
+commit refs/heads/U
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data <<COMMIT
+test setup
+COMMIT
+M 100644 inline hello.c
+data <<BLOB
+blob 1
+BLOB
+M 100644 inline good/night.txt
+data <<BLOB
+sleep well
+BLOB
+M 100644 inline good/bye.txt
+data <<BLOB
+au revoir
+BLOB
+
+INPUT_END
+
+test_expect_success 'U: initialize for U tests' '
+	git fast-import <input
+'
+
+cat >input <<INPUT_END
+commit refs/heads/U
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data <<COMMIT
+delete good/night.txt
+COMMIT
+from refs/heads/U^0
+D good/night.txt
+
+INPUT_END
+
+test_expect_success 'U: filedelete file succeeds' '
+	git fast-import <input
+'
+
+cat >expect <<EOF
+:100644 000000 2907ebb4bf85d91bf0716bb3bd8a68ef48d6da76 0000000000000000000000000000000000000000 D	good/night.txt
+EOF
+
+git diff-tree -M -r U^1 U >actual
+
+test_expect_success 'U: validate file delete result' '
+	compare_diff_raw expect actual
+'
+
+cat >input <<INPUT_END
+commit refs/heads/U
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data <<COMMIT
+delete good dir
+COMMIT
+from refs/heads/U^0
+D good
+
+INPUT_END
+
+test_expect_success 'U: filedelete directory succeeds' '
+	git fast-import <input
+'
+
+cat >expect <<EOF
+:100644 000000 69cb75792f55123d8389c156b0b41c2ff00ed507 0000000000000000000000000000000000000000 D	good/bye.txt
+EOF
+
+git diff-tree -M -r U^1 U >actual
+
+test_expect_success 'U: validate directory delete result' '
+	compare_diff_raw expect actual
+'
+
+cat >input <<INPUT_END
+commit refs/heads/U
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data <<COMMIT
+must succeed
+COMMIT
+from refs/heads/U^0
+D ""
+
+INPUT_END
+
+test_expect_success 'U: filedelete root succeeds' '
+    git fast-import <input
+'
+
+cat >expect <<EOF
+:100644 000000 c18147dc648481eeb65dc5e66628429a64843327 0000000000000000000000000000000000000000 D	hello.c
+EOF
+
+git diff-tree -M -r U^1 U >actual
+
+test_expect_success 'U: validate root delete result' '
+	compare_diff_raw expect actual
+'
+
 test_done
diff --git a/t/t9351-fast-export-anonymize.sh b/t/t9351-fast-export-anonymize.sh
new file mode 100755
index 0000000..897dc50
--- /dev/null
+++ b/t/t9351-fast-export-anonymize.sh
@@ -0,0 +1,112 @@
+#!/bin/sh
+
+test_description='basic tests for fast-export --anonymize'
+. ./test-lib.sh
+
+test_expect_success 'setup simple repo' '
+	test_commit base &&
+	test_commit foo &&
+	git checkout -b other HEAD^ &&
+	mkdir subdir &&
+	test_commit subdir/bar &&
+	test_commit subdir/xyzzy &&
+	git tag -m "annotated tag" mytag
+'
+
+test_expect_success 'export anonymized stream' '
+	git fast-export --anonymize --all >stream
+'
+
+# this also covers commit messages
+test_expect_success 'stream omits path names' '
+	! grep base stream &&
+	! grep foo stream &&
+	! grep subdir stream &&
+	! grep bar stream &&
+	! grep xyzzy stream
+'
+
+test_expect_success 'stream allows master as refname' '
+	grep master stream
+'
+
+test_expect_success 'stream omits other refnames' '
+	! grep other stream &&
+	! grep mytag stream
+'
+
+test_expect_success 'stream omits identities' '
+	! grep "$GIT_COMMITTER_NAME" stream &&
+	! grep "$GIT_COMMITTER_EMAIL" stream &&
+	! grep "$GIT_AUTHOR_NAME" stream &&
+	! grep "$GIT_AUTHOR_EMAIL" stream
+'
+
+test_expect_success 'stream omits tag message' '
+	! grep "annotated tag" stream
+'
+
+# NOTE: we chdir to the new, anonymized repository
+# after this. All further tests should assume this.
+test_expect_success 'import stream to new repository' '
+	git init new &&
+	cd new &&
+	git fast-import <../stream
+'
+
+test_expect_success 'result has two branches' '
+	git for-each-ref --format="%(refname)" refs/heads >branches &&
+	test_line_count = 2 branches &&
+	other_branch=$(grep -v refs/heads/master branches)
+'
+
+test_expect_success 'repo has original shape and timestamps' '
+	shape () {
+		git log --format="%m %ct" --left-right --boundary "$@"
+	} &&
+	(cd .. && shape master...other) >expect &&
+	shape master...$other_branch >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'root tree has original shape' '
+	# the output entries are not necessarily in the same
+	# order, but we know at least that we will have one tree
+	# and one blob, so just check the sorted order
+	cat >expect <<-\EOF &&
+	blob
+	tree
+	EOF
+	git ls-tree $other_branch >root &&
+	cut -d" " -f2 <root | sort >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'paths in subdir ended up in one tree' '
+	cat >expect <<-\EOF &&
+	blob
+	blob
+	EOF
+	tree=$(grep tree root | cut -f2) &&
+	git ls-tree $other_branch:$tree >tree &&
+	cut -d" " -f2 <tree >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'tag points to branch tip' '
+	git rev-parse $other_branch >expect &&
+	git for-each-ref --format="%(*objectname)" | grep . >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'idents are shared' '
+	git log --all --format="%an <%ae>" >authors &&
+	sort -u authors >unique &&
+	test_line_count = 1 unique &&
+	git log --all --format="%cn <%ce>" >committers &&
+	sort -u committers >unique &&
+	test_line_count = 1 unique &&
+	! test_cmp authors committers
+'
+
+test_done
diff --git a/t/t9809-git-p4-client-view.sh b/t/t9809-git-p4-client-view.sh
index 23a827f..897b3c3 100755
--- a/t/t9809-git-p4-client-view.sh
+++ b/t/t9809-git-p4-client-view.sh
@@ -365,7 +365,7 @@
 	(
 		cd "$git" &&
 		echo git-wild-hash >dir1/git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			echo git-wild-star >dir1/git-wild\*star
 		fi &&
@@ -379,7 +379,7 @@
 	(
 		cd "$cli" &&
 		test_path_is_file dir1/git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			test_path_is_file dir1/git-wild\*star
 		fi &&
diff --git a/t/t9812-git-p4-wildcards.sh b/t/t9812-git-p4-wildcards.sh
index c7472cb..0206771 100755
--- a/t/t9812-git-p4-wildcards.sh
+++ b/t/t9812-git-p4-wildcards.sh
@@ -14,7 +14,7 @@
 		printf "file2\nhas\nsome\nrandom\ntext\n" >file2 &&
 		p4 add file2 &&
 		echo file-wild-hash >file-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			echo file-wild-star >file-wild\*star
 		fi &&
@@ -31,7 +31,7 @@
 	(
 		cd "$git" &&
 		test -f file-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			test -f file-wild\*star
 		fi &&
@@ -46,7 +46,7 @@
 	(
 		cd "$git" &&
 		echo git-wild-hash >git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			echo git-wild-star >git-wild\*star
 		fi &&
@@ -60,7 +60,7 @@
 	(
 		cd "$cli" &&
 		test_path_is_file git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			test_path_is_file git-wild\*star
 		fi &&
@@ -75,7 +75,7 @@
 	(
 		cd "$git" &&
 		echo new-line >>git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			echo new-line >>git-wild\*star
 		fi &&
@@ -89,7 +89,7 @@
 	(
 		cd "$cli" &&
 		test_line_count = 2 git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			test_line_count = 2 git-wild\*star
 		fi &&
@@ -152,7 +152,7 @@
 	(
 		cd "$cli" &&
 		test_path_is_missing git-wild#hash &&
-		if test_have_prereq NOT_MINGW NOT_CYGWIN
+		if test_have_prereq !MINGW,!CYGWIN
 		then
 			test_path_is_missing git-wild\*star
 		fi &&
diff --git a/t/t9815-git-p4-submit-fail.sh b/t/t9815-git-p4-submit-fail.sh
index 1243d96..4cff6a7 100755
--- a/t/t9815-git-p4-submit-fail.sh
+++ b/t/t9815-git-p4-submit-fail.sh
@@ -417,7 +417,7 @@
 		! p4 fstat -T action text &&
 		test_path_is_file text+x &&
 		! p4 fstat -T action text+x &&
-		if test_have_prereq NOT_CYGWIN
+		if test_have_prereq !CYGWIN
 		then
 			stat --format=%A text | egrep ^-r-- &&
 			stat --format=%A text+x | egrep ^-r-x
diff --git a/t/test-lib.sh b/t/test-lib.sh
index b1bc65b..82095e3 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -870,7 +870,7 @@
 	# backslashes in pathspec are converted to '/'
 	# exec does not inherit the PID
 	test_set_prereq MINGW
-	test_set_prereq NOT_CYGWIN
+	test_set_prereq NATIVE_CRLF
 	test_set_prereq SED_STRIPS_CR
 	test_set_prereq GREP_STRIPS_CR
 	GIT_TEST_CMP=mingw_test_cmp
@@ -878,7 +878,6 @@
 *CYGWIN*)
 	test_set_prereq POSIXPERM
 	test_set_prereq EXECKEEPSPID
-	test_set_prereq NOT_MINGW
 	test_set_prereq CYGWIN
 	test_set_prereq SED_STRIPS_CR
 	test_set_prereq GREP_STRIPS_CR
@@ -887,8 +886,6 @@
 	test_set_prereq POSIXPERM
 	test_set_prereq BSLASHPSPEC
 	test_set_prereq EXECKEEPSPID
-	test_set_prereq NOT_MINGW
-	test_set_prereq NOT_CYGWIN
 	;;
 esac
 
diff --git a/test-config.c b/test-config.c
new file mode 100644
index 0000000..6a77552
--- /dev/null
+++ b/test-config.c
@@ -0,0 +1,152 @@
+#include "cache.h"
+#include "string-list.h"
+
+/*
+ * This program exposes the C API of the configuration mechanism
+ * as a set of simple commands in order to facilitate testing.
+ *
+ * Reads stdin and prints result of command to stdout:
+ *
+ * get_value -> prints the value with highest priority for the entered key
+ *
+ * get_value_multi -> prints all values for the entered key in increasing order
+ *		     of priority
+ *
+ * get_int -> print integer value for the entered key or die
+ *
+ * get_bool -> print bool value for the entered key or die
+ *
+ * get_string -> print string value for the entered key or die
+ *
+ * configset_get_value -> returns value with the highest priority for the entered key
+ * 			from a config_set constructed from files entered as arguments.
+ *
+ * configset_get_value_multi -> returns value_list for the entered key sorted in
+ * 				ascending order of priority from a config_set
+ * 				constructed from files entered as arguments.
+ *
+ * Examples:
+ *
+ * To print the value with highest priority for key "foo.bAr Baz.rock":
+ * 	test-config get_value "foo.bAr Baz.rock"
+ *
+ */
+
+
+int main(int argc, char **argv)
+{
+	int i, val;
+	const char *v;
+	const struct string_list *strptr;
+	struct config_set cs;
+	git_configset_init(&cs);
+
+	if (argc < 2) {
+		fprintf(stderr, "Please, provide a command name on the command-line\n");
+		goto exit1;
+	} else if (argc == 3 && !strcmp(argv[1], "get_value")) {
+		if (!git_config_get_value(argv[2], &v)) {
+			if (!v)
+				printf("(NULL)\n");
+			else
+				printf("%s\n", v);
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (argc == 3 && !strcmp(argv[1], "get_value_multi")) {
+		strptr = git_config_get_value_multi(argv[2]);
+		if (strptr) {
+			for (i = 0; i < strptr->nr; i++) {
+				v = strptr->items[i].string;
+				if (!v)
+					printf("(NULL)\n");
+				else
+					printf("%s\n", v);
+			}
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (argc == 3 && !strcmp(argv[1], "get_int")) {
+		if (!git_config_get_int(argv[2], &val)) {
+			printf("%d\n", val);
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (argc == 3 && !strcmp(argv[1], "get_bool")) {
+		if (!git_config_get_bool(argv[2], &val)) {
+			printf("%d\n", val);
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (argc == 3 && !strcmp(argv[1], "get_string")) {
+		if (!git_config_get_string_const(argv[2], &v)) {
+			printf("%s\n", v);
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (!strcmp(argv[1], "configset_get_value")) {
+		for (i = 3; i < argc; i++) {
+			int err;
+			if ((err = git_configset_add_file(&cs, argv[i]))) {
+				fprintf(stderr, "Error (%d) reading configuration file %s.\n", err, argv[i]);
+				goto exit2;
+			}
+		}
+		if (!git_configset_get_value(&cs, argv[2], &v)) {
+			if (!v)
+				printf("(NULL)\n");
+			else
+				printf("%s\n", v);
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	} else if (!strcmp(argv[1], "configset_get_value_multi")) {
+		for (i = 3; i < argc; i++) {
+			int err;
+			if ((err = git_configset_add_file(&cs, argv[i]))) {
+				fprintf(stderr, "Error (%d) reading configuration file %s.\n", err, argv[i]);
+				goto exit2;
+			}
+		}
+		strptr = git_configset_get_value_multi(&cs, argv[2]);
+		if (strptr) {
+			for (i = 0; i < strptr->nr; i++) {
+				v = strptr->items[i].string;
+				if (!v)
+					printf("(NULL)\n");
+				else
+					printf("%s\n", v);
+			}
+			goto exit0;
+		} else {
+			printf("Value not found for \"%s\"\n", argv[2]);
+			goto exit1;
+		}
+	}
+
+	die("%s: Please check the syntax and the function name", argv[0]);
+
+exit0:
+	git_configset_clear(&cs);
+	return 0;
+
+exit1:
+	git_configset_clear(&cs);
+	return 1;
+
+exit2:
+	git_configset_clear(&cs);
+	return 2;
+}
diff --git a/test-date.c b/test-date.c
index 10afaab..94a6997 100644
--- a/test-date.c
+++ b/test-date.c
@@ -19,19 +19,21 @@
 
 static void parse_dates(char **argv, struct timeval *now)
 {
+	struct strbuf result = STRBUF_INIT;
+
 	for (; *argv; argv++) {
-		char result[100];
 		unsigned long t;
 		int tz;
 
-		result[0] = 0;
-		parse_date(*argv, result, sizeof(result));
-		if (sscanf(result, "%lu %d", &t, &tz) == 2)
+		strbuf_reset(&result);
+		parse_date(*argv, &result);
+		if (sscanf(result.buf, "%lu %d", &t, &tz) == 2)
 			printf("%s -> %s\n",
 			       *argv, show_date(t, tz, DATE_ISO8601));
 		else
 			printf("%s -> bad\n", *argv);
 	}
+	strbuf_release(&result);
 }
 
 static void parse_approxidate(char **argv, struct timeval *now)
diff --git a/test-dump-cache-tree.c b/test-dump-cache-tree.c
index 330ba4f..54c0872 100644
--- a/test-dump-cache-tree.c
+++ b/test-dump-cache-tree.c
@@ -26,16 +26,16 @@
 		return 0;
 
 	if (it->entry_count < 0) {
+		/* invalid */
 		dump_one(it, pfx, "");
 		dump_one(ref, pfx, "#(ref) ");
-		if (it->subtree_nr != ref->subtree_nr)
-			errs = 1;
 	}
 	else {
 		dump_one(it, pfx, "");
 		if (hashcmp(it->sha1, ref->sha1) ||
 		    ref->entry_count != it->entry_count ||
 		    ref->subtree_nr != it->subtree_nr) {
+			/* claims to be valid but is lying */
 			dump_one(ref, pfx, "#(ref) ");
 			errs = 1;
 		}
diff --git a/test-run-command.c b/test-run-command.c
index 37918e1..89c7de2 100644
--- a/test-run-command.c
+++ b/test-run-command.c
@@ -15,9 +15,7 @@
 
 int main(int argc, char **argv)
 {
-	struct child_process proc;
-
-	memset(&proc, 0, sizeof(proc));
+	struct child_process proc = CHILD_PROCESS_INIT;
 
 	if (argc < 3)
 		return 1;
diff --git a/test-subprocess.c b/test-subprocess.c
index 93525eb..56881a0 100644
--- a/test-subprocess.c
+++ b/test-subprocess.c
@@ -3,7 +3,7 @@
 
 int main(int argc, char **argv)
 {
-	struct child_process cp;
+	struct child_process cp = CHILD_PROCESS_INIT;
 	int nogit = 0;
 
 	setup_git_directory_gently(&nogit);
@@ -13,7 +13,6 @@
 		setup_work_tree();
 		argv++;
 	}
-	memset(&cp, 0, sizeof(cp));
 	cp.git_cmd = 1;
 	cp.argv = (const char **)argv + 1;
 	return run_command(&cp);
diff --git a/trace.c b/trace.c
index e583dc6..54aaee5 100644
--- a/trace.c
+++ b/trace.c
@@ -298,13 +298,12 @@
 {
 	static struct trace_key key = TRACE_KEY_INIT(SETUP);
 	const char *git_work_tree;
-	char cwd[PATH_MAX];
+	char *cwd;
 
 	if (!trace_want(&key))
 		return;
 
-	if (!getcwd(cwd, PATH_MAX))
-		die("Unable to get current working directory");
+	cwd = xgetcwd();
 
 	if (!(git_work_tree = get_git_work_tree()))
 		git_work_tree = "(null)";
@@ -316,6 +315,8 @@
 	trace_printf_key(&key, "setup: worktree: %s\n", quote_crnl(git_work_tree));
 	trace_printf_key(&key, "setup: cwd: %s\n", quote_crnl(cwd));
 	trace_printf_key(&key, "setup: prefix: %s\n", quote_crnl(prefix));
+
+	free(cwd);
 }
 
 int trace_want(struct trace_key *key)
diff --git a/transport-helper.c b/transport-helper.c
index 3d8fe7d..080a7a6 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -118,7 +118,8 @@
 	if (data->helper)
 		return data->helper;
 
-	helper = xcalloc(1, sizeof(*helper));
+	helper = xmalloc(sizeof(*helper));
+	child_process_init(helper);
 	helper->in = -1;
 	helper->out = -1;
 	helper->err = 0;
@@ -395,7 +396,7 @@
 	struct child_process *helper = get_helper(transport);
 	struct helper_data *data = transport->data;
 	int cat_blob_fd, code;
-	memset(fastimport, 0, sizeof(*fastimport));
+	child_process_init(fastimport);
 	fastimport->in = helper->out;
 	argv_array_push(&fastimport->args, "fast-import");
 	argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet");
diff --git a/transport.c b/transport.c
index 662421b..7388bb8 100644
--- a/transport.c
+++ b/transport.c
@@ -201,7 +201,7 @@
 {
 	struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 	struct ref dummy = {NULL}, *tail = &dummy;
-	struct child_process rsync;
+	struct child_process rsync = CHILD_PROCESS_INIT;
 	const char *args[5];
 	int temp_dir_len;
 
@@ -218,7 +218,6 @@
 	strbuf_addstr(&buf, rsync_url(transport->url));
 	strbuf_addstr(&buf, "/refs");
 
-	memset(&rsync, 0, sizeof(rsync));
 	rsync.argv = args;
 	rsync.stdout_to_stderr = 1;
 	args[0] = "rsync";
@@ -263,9 +262,8 @@
 static int fetch_objs_via_rsync(struct transport *transport,
 				int nr_objs, struct ref **to_fetch)
 {
-	struct child_process rsync;
+	struct child_process rsync = CHILD_PROCESS_INIT;
 
-	memset(&rsync, 0, sizeof(rsync));
 	rsync.stdout_to_stderr = 1;
 	argv_array_push(&rsync.args, "rsync");
 	argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
@@ -327,7 +325,7 @@
 {
 	struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 	int result = 0, i;
-	struct child_process rsync;
+	struct child_process rsync = CHILD_PROCESS_INIT;
 	const char *args[10];
 
 	if (flags & TRANSPORT_PUSH_MIRROR)
@@ -338,7 +336,6 @@
 	strbuf_addstr(&buf, rsync_url(transport->url));
 	strbuf_addch(&buf, '/');
 
-	memset(&rsync, 0, sizeof(rsync));
 	rsync.argv = args;
 	rsync.stdout_to_stderr = 1;
 	i = 0;
@@ -1056,7 +1053,7 @@
 {
 	int ret = 0, x;
 	struct ref *r;
-	struct child_process proc;
+	struct child_process proc = CHILD_PROCESS_INIT;
 	struct strbuf buf;
 	const char *argv[4];
 
@@ -1067,7 +1064,6 @@
 	argv[2] = transport->url;
 	argv[3] = NULL;
 
-	memset(&proc, 0, sizeof(proc));
 	proc.argv = argv;
 	proc.in = -1;
 
diff --git a/unix-socket.c b/unix-socket.c
index 91bd6b8..19ed48b 100644
--- a/unix-socket.c
+++ b/unix-socket.c
@@ -18,12 +18,12 @@
 }
 
 struct unix_sockaddr_context {
-	char orig_dir[PATH_MAX];
+	char *orig_dir;
 };
 
 static void unix_sockaddr_cleanup(struct unix_sockaddr_context *ctx)
 {
-	if (!ctx->orig_dir[0])
+	if (!ctx->orig_dir)
 		return;
 	/*
 	 * If we fail, we can't just return an error, since we have
@@ -32,6 +32,7 @@
 	 */
 	if (chdir(ctx->orig_dir) < 0)
 		die("unable to restore original working directory");
+	free(ctx->orig_dir);
 }
 
 static int unix_sockaddr_init(struct sockaddr_un *sa, const char *path,
@@ -39,10 +40,11 @@
 {
 	int size = strlen(path) + 1;
 
-	ctx->orig_dir[0] = '\0';
+	ctx->orig_dir = NULL;
 	if (size > sizeof(sa->sun_path)) {
 		const char *slash = find_last_dir_sep(path);
 		const char *dir;
+		struct strbuf cwd = STRBUF_INIT;
 
 		if (!slash) {
 			errno = ENAMETOOLONG;
@@ -56,11 +58,9 @@
 			errno = ENAMETOOLONG;
 			return -1;
 		}
-
-		if (!getcwd(ctx->orig_dir, sizeof(ctx->orig_dir))) {
-			errno = ENAMETOOLONG;
+		if (strbuf_getcwd(&cwd))
 			return -1;
-		}
+		ctx->orig_dir = strbuf_detach(&cwd, NULL);
 		if (chdir_len(dir, slash - dir) < 0)
 			return -1;
 	}
diff --git a/unpack-trees.c b/unpack-trees.c
index c6aa8fb..629c658 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -1176,7 +1176,8 @@
 static int reject_merge(const struct cache_entry *ce,
 			struct unpack_trees_options *o)
 {
-	return add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name);
+	return o->gently ? -1 :
+		add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name);
 }
 
 static int same(const struct cache_entry *a, const struct cache_entry *b)
@@ -1631,7 +1632,7 @@
 	/* #14, #14ALT, #2ALT */
 	if (remote && !df_conflict_head && head_match && !remote_match) {
 		if (index && !same(index, remote) && !same(index, head))
-			return o->gently ? -1 : reject_merge(index, o);
+			return reject_merge(index, o);
 		return merged_entry(remote, index, o);
 	}
 	/*
@@ -1639,7 +1640,7 @@
 	 * make sure that it matches head.
 	 */
 	if (index && !same(index, head))
-		return o->gently ? -1 : reject_merge(index, o);
+		return reject_merge(index, o);
 
 	if (head) {
 		/* #5ALT, #15 */
@@ -1768,9 +1769,8 @@
 				else
 					return merged_entry(newtree, current, o);
 			}
-			return o->gently ? -1 : reject_merge(current, o);
-		}
-		else if ((!oldtree && !newtree) || /* 4 and 5 */
+			return reject_merge(current, o);
+		} else if ((!oldtree && !newtree) || /* 4 and 5 */
 			 (!oldtree && newtree &&
 			  same(current, newtree)) || /* 6 and 7 */
 			 (oldtree && newtree &&
@@ -1779,26 +1779,15 @@
 			  !same(oldtree, newtree) && /* 18 and 19 */
 			  same(current, newtree))) {
 			return keep_entry(current, o);
-		}
-		else if (oldtree && !newtree && same(current, oldtree)) {
+		} else if (oldtree && !newtree && same(current, oldtree)) {
 			/* 10 or 11 */
 			return deleted_entry(oldtree, current, o);
-		}
-		else if (oldtree && newtree &&
+		} else if (oldtree && newtree &&
 			 same(current, oldtree) && !same(current, newtree)) {
 			/* 20 or 21 */
 			return merged_entry(newtree, current, o);
-		}
-		else {
-			/* all other failures */
-			if (oldtree)
-				return o->gently ? -1 : reject_merge(oldtree, o);
-			if (current)
-				return o->gently ? -1 : reject_merge(current, o);
-			if (newtree)
-				return o->gently ? -1 : reject_merge(newtree, o);
-			return -1;
-		}
+		} else
+			return reject_merge(current, o);
 	}
 	else if (newtree) {
 		if (oldtree && !o->initial_checkout) {
diff --git a/upload-pack.c b/upload-pack.c
index 01de944..c789ec0 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -80,7 +80,7 @@
 
 static void create_pack_file(void)
 {
-	struct child_process pack_objects;
+	struct child_process pack_objects = CHILD_PROCESS_INIT;
 	char data[8193], progress[128];
 	char abort_msg[] = "aborting due to possible repository "
 		"corruption on the remote side.";
@@ -108,7 +108,6 @@
 		argv[arg++] = "--include-tag";
 	argv[arg++] = NULL;
 
-	memset(&pack_objects, 0, sizeof(pack_objects));
 	pack_objects.in = -1;
 	pack_objects.out = -1;
 	pack_objects.err = -1;
@@ -167,7 +166,9 @@
 		if (!pollsize)
 			break;
 
-		ret = poll(pfd, pollsize, 1000 * keepalive);
+		ret = poll(pfd, pollsize,
+			keepalive < 0 ? -1 : 1000 * keepalive);
+
 		if (ret < 0) {
 			if (errno != EINTR) {
 				error("poll failed, resuming: %s",
@@ -448,7 +449,7 @@
 	static const char *argv[] = {
 		"rev-list", "--stdin", NULL,
 	};
-	static struct child_process cmd;
+	static struct child_process cmd = CHILD_PROCESS_INIT;
 	struct object *o;
 	char namebuf[42]; /* ^ + SHA-1 + LF */
 	int i;
diff --git a/utf8.c b/utf8.c
index b30790d..401a6a5 100644
--- a/utf8.c
+++ b/utf8.c
@@ -382,6 +382,9 @@
 			dst += n;
 		}
 
+		if (src >= end)
+			break;
+
 		old = src;
 		n = utf8_width((const char**)&src, NULL);
 		if (!src) 	/* broken utf-8, do nothing */
diff --git a/walker.c b/walker.c
index 0148264..f8d3709 100644
--- a/walker.c
+++ b/walker.c
@@ -205,7 +205,7 @@
 	struct commit *commit = lookup_commit_reference_gently(sha1, 1);
 	if (commit) {
 		commit->object.flags |= COMPLETE;
-		commit_list_insert_by_date(commit, &complete);
+		commit_list_insert(commit, &complete);
 	}
 	return 0;
 }
@@ -251,64 +251,76 @@
 int walker_fetch(struct walker *walker, int targets, char **target,
 		 const char **write_ref, const char *write_ref_log_details)
 {
-	struct ref_lock **lock = xcalloc(targets, sizeof(struct ref_lock *));
+	struct strbuf refname = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
+	struct ref_transaction *transaction = NULL;
 	unsigned char *sha1 = xmalloc(targets * 20);
-	const char *msg;
-	char *to_free = NULL;
-	int ret;
-	int i;
+	char *msg = NULL;
+	int i, ret = -1;
 
 	save_commit_buffer = 0;
 
-	for (i = 0; i < targets; i++) {
-		if (!write_ref || !write_ref[i])
-			continue;
-
-		lock[i] = lock_ref_sha1(write_ref[i], NULL);
-		if (!lock[i]) {
-			error("Can't lock ref %s", write_ref[i]);
-			goto unlock_and_fail;
+	if (write_ref) {
+		transaction = ref_transaction_begin(&err);
+		if (!transaction) {
+			error("%s", err.buf);
+			goto done;
 		}
 	}
 
-	if (!walker->get_recover)
+	if (!walker->get_recover) {
 		for_each_ref(mark_complete, NULL);
+		commit_list_sort_by_date(&complete);
+	}
 
 	for (i = 0; i < targets; i++) {
 		if (interpret_target(walker, target[i], &sha1[20 * i])) {
 			error("Could not interpret response from server '%s' as something to pull", target[i]);
-			goto unlock_and_fail;
+			goto done;
 		}
 		if (process(walker, lookup_unknown_object(&sha1[20 * i])))
-			goto unlock_and_fail;
+			goto done;
 	}
 
 	if (loop(walker))
-		goto unlock_and_fail;
-
-	if (write_ref_log_details)
-		msg = to_free = xstrfmt("fetch from %s", write_ref_log_details);
-	else
-		msg = "fetch (unknown)";
-	for (i = 0; i < targets; i++) {
-		if (!write_ref || !write_ref[i])
-			continue;
-		ret = write_ref_sha1(lock[i], &sha1[20 * i], msg);
-		lock[i] = NULL;
-		if (ret)
-			goto unlock_and_fail;
+		goto done;
+	if (!write_ref) {
+		ret = 0;
+		goto done;
 	}
-	free(to_free);
+	if (write_ref_log_details) {
+		msg = xstrfmt("fetch from %s", write_ref_log_details);
+	} else {
+		msg = NULL;
+	}
+	for (i = 0; i < targets; i++) {
+		if (!write_ref[i])
+			continue;
+		strbuf_reset(&refname);
+		strbuf_addf(&refname, "refs/%s", write_ref[i]);
+		if (ref_transaction_update(transaction, refname.buf,
+					   &sha1[20 * i], NULL, 0, 0,
+					   &err)) {
+			error("%s", err.buf);
+			goto done;
+		}
+	}
+	if (ref_transaction_commit(transaction,
+				   msg ? msg : "fetch (unknown)",
+				   &err)) {
+		error("%s", err.buf);
+		goto done;
+	}
 
-	return 0;
+	ret = 0;
 
-unlock_and_fail:
-	for (i = 0; i < targets; i++)
-		if (lock[i])
-			unlock_ref(lock[i]);
-	free(to_free);
-
-	return -1;
+done:
+	ref_transaction_free(transaction);
+	free(msg);
+	free(sha1);
+	strbuf_release(&err);
+	strbuf_release(&refname);
+	return ret;
 }
 
 void walker_free(struct walker *walker)
diff --git a/wrapper.c b/wrapper.c
index bc1bfb8..25074d7 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -9,16 +9,23 @@
 
 static void (*try_to_free_routine)(size_t size) = do_nothing;
 
-static void memory_limit_check(size_t size)
+static int memory_limit_check(size_t size, int gentle)
 {
 	static int limit = -1;
 	if (limit == -1) {
 		const char *env = getenv("GIT_ALLOC_LIMIT");
 		limit = env ? atoi(env) * 1024 : 0;
 	}
-	if (limit && size > limit)
-		die("attempting to allocate %"PRIuMAX" over limit %d",
-		    (intmax_t)size, limit);
+	if (limit && size > limit) {
+		if (gentle) {
+			error("attempting to allocate %"PRIuMAX" over limit %d",
+			      (intmax_t)size, limit);
+			return -1;
+		} else
+			die("attempting to allocate %"PRIuMAX" over limit %d",
+			    (intmax_t)size, limit);
+	}
+	return 0;
 }
 
 try_to_free_t set_try_to_free_routine(try_to_free_t routine)
@@ -42,11 +49,12 @@
 	return ret;
 }
 
-void *xmalloc(size_t size)
+static void *do_xmalloc(size_t size, int gentle)
 {
 	void *ret;
 
-	memory_limit_check(size);
+	if (memory_limit_check(size, gentle))
+		return NULL;
 	ret = malloc(size);
 	if (!ret && !size)
 		ret = malloc(1);
@@ -55,9 +63,16 @@
 		ret = malloc(size);
 		if (!ret && !size)
 			ret = malloc(1);
-		if (!ret)
-			die("Out of memory, malloc failed (tried to allocate %lu bytes)",
-			    (unsigned long)size);
+		if (!ret) {
+			if (!gentle)
+				die("Out of memory, malloc failed (tried to allocate %lu bytes)",
+				    (unsigned long)size);
+			else {
+				error("Out of memory, malloc failed (tried to allocate %lu bytes)",
+				      (unsigned long)size);
+				return NULL;
+			}
+		}
 	}
 #ifdef XMALLOC_POISON
 	memset(ret, 0xA5, size);
@@ -65,16 +80,37 @@
 	return ret;
 }
 
-void *xmallocz(size_t size)
+void *xmalloc(size_t size)
+{
+	return do_xmalloc(size, 0);
+}
+
+static void *do_xmallocz(size_t size, int gentle)
 {
 	void *ret;
-	if (unsigned_add_overflows(size, 1))
-		die("Data too large to fit into virtual memory space.");
-	ret = xmalloc(size + 1);
-	((char*)ret)[size] = 0;
+	if (unsigned_add_overflows(size, 1)) {
+		if (gentle) {
+			error("Data too large to fit into virtual memory space.");
+			return NULL;
+		} else
+			die("Data too large to fit into virtual memory space.");
+	}
+	ret = do_xmalloc(size + 1, gentle);
+	if (ret)
+		((char*)ret)[size] = 0;
 	return ret;
 }
 
+void *xmallocz(size_t size)
+{
+	return do_xmallocz(size, 0);
+}
+
+void *xmallocz_gently(size_t size)
+{
+	return do_xmallocz(size, 1);
+}
+
 /*
  * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
  * "data" to the allocated memory, zero terminates the allocated memory,
@@ -96,7 +132,7 @@
 {
 	void *ret;
 
-	memory_limit_check(size);
+	memory_limit_check(size, 0);
 	ret = realloc(ptr, size);
 	if (!ret && !size)
 		ret = realloc(ptr, 1);
@@ -115,7 +151,7 @@
 {
 	void *ret;
 
-	memory_limit_check(size * nmemb);
+	memory_limit_check(size * nmemb, 0);
 	ret = calloc(nmemb, size);
 	if (!ret && (!nmemb || !size))
 		ret = calloc(1, 1);
@@ -493,3 +529,11 @@
 		    errno ? strerror(errno) : _("no such user"));
 	return pw;
 }
+
+char *xgetcwd(void)
+{
+	struct strbuf sb = STRBUF_INIT;
+	if (strbuf_getcwd(&sb))
+		die_errno(_("unable to get current working directory"));
+	return strbuf_detach(&sb, NULL);
+}
diff --git a/wt-status.c b/wt-status.c
index 27da529..1bf5d72 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -725,7 +725,7 @@
 
 static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitted)
 {
-	struct child_process sm_summary;
+	struct child_process sm_summary = CHILD_PROCESS_INIT;
 	struct argv_array env = ARGV_ARRAY_INIT;
 	struct argv_array argv = ARGV_ARRAY_INIT;
 	struct strbuf cmd_stdout = STRBUF_INIT;
@@ -744,7 +744,6 @@
 	if (!uncommitted)
 		argv_array_push(&argv, s->amend ? "HEAD^" : "HEAD");
 
-	memset(&sm_summary, 0, sizeof(sm_summary));
 	sm_summary.argv = argv.argv;
 	sm_summary.env = env.argv;
 	sm_summary.git_cmd = 1;