t/t3400-rebase.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2005 Amos Waterland
 #

 test_description='git rebase assorted tests

 This test runs git rebase and checks that the author information is not lost
 among other things.
 '
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh

 GIT_AUTHOR_NAME=author@name
 GIT_AUTHOR_EMAIL=bogus@email@address
 export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL

 test_expect_success 'prepare repository with topic branches' '
 	test_commit "Add A." A First First &&
 	git checkout -b force-3way &&
 	echo Dummy >Y &&
 	git update-index --add Y &&
 	git commit -m "Add Y." &&
 	git checkout -b filemove &&
 	git reset --soft main &&
 	mkdir D &&
 	git mv A D/A &&
 	git commit -m "Move A." &&
 	git checkout -b my-topic-branch main &&
 	test_commit "Add B." B Second Second &&
 	git checkout -f main &&
 	echo Third >>A &&
 	git update-index A &&
 	git commit -m "Modify A." &&
 	git checkout -b side my-topic-branch &&
 	echo Side >>C &&
 	git add C &&
 	git commit -m "Add C" &&
 	git checkout -f my-topic-branch &&
 	git tag topic
 '

 test_expect_success 'rebase on dirty worktree' '
 	echo dirty >>A &&
 	test_must_fail git rebase main
 '

 test_expect_success 'rebase on dirty cache' '
 	git add A &&
 	test_must_fail git rebase main
 '

 test_expect_success 'rebase against main' '
 	git reset --hard HEAD &&
 	git rebase main
 '

 test_expect_success 'rebase sets ORIG_HEAD to pre-rebase state' '
 	git checkout -b orig-head topic &&
 	pre="$(git rev-parse --verify HEAD)" &&
 	git rebase main &&
 	test_cmp_rev "$pre" ORIG_HEAD &&
 	test_cmp_rev ! "$pre" HEAD
 '

 test_expect_success 'rebase, with <onto> and <upstream> specified as :/quuxery' '
 	test_when_finished "git branch -D torebase" &&
 	git checkout -b torebase my-topic-branch^ &&
 	upstream=$(git rev-parse ":/Add B") &&
 	onto=$(git rev-parse ":/Add A") &&
 	git rebase --onto $onto $upstream &&
 	git reset --hard my-topic-branch^ &&
 	git rebase --onto ":/Add A" ":/Add B" &&
 	git checkout my-topic-branch
 '

 test_expect_success 'the rebase operation should not have destroyed author information' '
 	! (git log | grep "Author:" | grep "<>")
 '

 test_expect_success 'the rebase operation should not have destroyed author information (2)' "
 	git log -1 |
 	grep 'Author: $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>'
 "

 test_expect_success 'HEAD was detached during rebase' '
 	test $(git rev-parse HEAD@{1}) != $(git rev-parse my-topic-branch@{1})
 '

 test_expect_success 'rebase from ambiguous branch name' '
 	git checkout -b topic side &&
 	git rebase main
 '

 test_expect_success 'rebase off of the previous branch using "-"' '
 	git checkout main &&
 	git checkout HEAD^ &&
 	git rebase @{-1} >expect.messages &&
 	git merge-base main HEAD >expect.forkpoint &&

 	git checkout main &&
 	git checkout HEAD^ &&
 	git rebase - >actual.messages &&
 	git merge-base main HEAD >actual.forkpoint &&

 	test_cmp expect.forkpoint actual.forkpoint &&
 	# the next one is dubious---we may want to say "-",
 	# instead of @{-1}, in the message
 	test_cmp expect.messages actual.messages
 '

 test_expect_success 'rebase a single mode change' '
 	git checkout main &&
 	git branch -D topic &&
 	echo 1 >X &&
 	git add X &&
 	test_tick &&
 	git commit -m prepare &&
 	git checkout -b modechange HEAD^ &&
 	echo 1 >X &&
 	git add X &&
 	test_chmod +x A &&
 	test_tick &&
 	git commit -m modechange &&
 	GIT_TRACE=1 git rebase main
 '

 test_expect_success 'rebase is not broken by diff.renames' '
 	test_config diff.renames copies &&
 	git checkout filemove &&
 	GIT_TRACE=1 git rebase force-3way
 '

 test_expect_success 'setup: recover' '
 	test_might_fail git rebase --abort &&
 	git reset --hard &&
 	git checkout modechange
 '

 test_expect_success 'Show verbose error when HEAD could not be detached' '
 	>B &&
 	test_when_finished "rm -f B" &&
 	test_must_fail git rebase topic 2>output.err >output.out &&
 	test_grep "The following untracked working tree files would be overwritten by checkout:" output.err &&
 	test_grep B output.err
 '

 test_expect_success 'fail when upstream arg is missing and not on branch' '
 	git checkout topic &&
 	test_must_fail git rebase
 '

 test_expect_success 'fail when upstream arg is missing and not configured' '
 	git checkout -b no-config topic &&
 	test_must_fail git rebase
 '

 test_expect_success 'rebase works with format.useAutoBase' '
 	test_config format.useAutoBase true &&
 	git checkout topic &&
 	git rebase main
 '

 test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg (--merge)' '
 	git checkout -b default-base main &&
 	git checkout -b default topic &&
 	git config branch.default.remote . &&
 	git config branch.default.merge refs/heads/default-base &&
 	git rebase --merge &&
 	git rev-parse --verify default-base >expect &&
 	git rev-parse default~1 >actual &&
 	test_cmp expect actual &&
 	git checkout default-base &&
 	git reset --hard HEAD^ &&
 	git checkout default &&
 	git rebase --merge &&
 	git rev-parse --verify default-base >expect &&
 	git rev-parse default~1 >actual &&
 	test_cmp expect actual
 '

 test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg (--apply)' '
 	git checkout -B default-base main &&
 	git checkout -B default topic &&
 	git config branch.default.remote . &&
 	git config branch.default.merge refs/heads/default-base &&
 	git rebase --apply &&
 	git rev-parse --verify default-base >expect &&
 	git rev-parse default~1 >actual &&
 	test_cmp expect actual &&
 	git checkout default-base &&
 	git reset --hard HEAD^ &&
 	git checkout default &&
 	git rebase --apply &&
 	git rev-parse --verify default-base >expect &&
 	git rev-parse default~1 >actual &&
 	test_cmp expect actual
 '

 test_expect_success 'cherry-picked commits and fork-point work together' '
 	git checkout default-base &&
 	echo Amended >A &&
 	git commit -a --no-edit --amend &&
 	test_commit B B &&
 	test_commit new_B B "New B" &&
 	test_commit C C &&
 	git checkout default &&
 	git reset --hard default-base@{4} &&
 	test_commit D D &&
 	git cherry-pick -2 default-base^ &&
 	test_commit final_B B "Final B" &&
 	git rebase &&
 	echo Amended >expect &&
 	test_cmp expect A &&
 	echo "Final B" >expect &&
 	test_cmp expect B &&
 	echo C >expect &&
 	test_cmp expect C &&
 	echo D >expect &&
 	test_cmp expect D
 '

 test_expect_success 'rebase --apply -q is quiet' '
 	git checkout -b quiet topic &&
 	git rebase --apply -q main >output.out 2>&1 &&
 	test_must_be_empty output.out
 '

 test_expect_success 'rebase --merge -q is quiet' '
 	git checkout -B quiet topic &&
 	git rebase --merge -q main >output.out 2>&1 &&
 	test_must_be_empty output.out
 '

 test_expect_success 'Rebase a commit that sprinkles CRs in' '
 	(
 		echo "One" &&
 		echo "TwoQ" &&
 		echo "Three" &&
 		echo "FQur" &&
 		echo "Five"
 	) | q_to_cr >CR &&
 	git add CR &&
 	test_tick &&
 	git commit -a -m "A file with a line with CR" &&
 	git tag file-with-cr &&
 	git checkout HEAD^0 &&
 	git rebase --onto HEAD^^ HEAD^ &&
 	git diff --exit-code file-with-cr:CR HEAD:CR
 '

 test_expect_success 'rebase can copy notes' '
 	git config notes.rewrite.rebase true &&
 	git config notes.rewriteRef "refs/notes/*" &&
 	test_commit n1 &&
 	test_commit n2 &&
 	test_commit n3 &&
 	git notes add -m"a note" n3 &&
 	git rebase --onto n1 n2 &&
 	test "a note" = "$(git notes show HEAD)"
 '

 test_expect_success 'rebase -m can copy notes' '
 	git reset --hard n3 &&
 	git rebase -m --onto n1 n2 &&
 	test "a note" = "$(git notes show HEAD)"
 '

 test_expect_success 'rebase commit with an ancient timestamp' '
 	git reset --hard &&

 	>old.one && git add old.one && test_tick &&
 	git commit --date="@12345 +0400" -m "Old one" &&
 	>old.two && git add old.two && test_tick &&
 	git commit --date="@23456 +0500" -m "Old two" &&
 	>old.three && git add old.three && test_tick &&
 	git commit --date="@34567 +0600" -m "Old three" &&

 	git cat-file commit HEAD^^ >actual &&
 	grep "author .* 12345 +0400$" actual &&
 	git cat-file commit HEAD^ >actual &&
 	grep "author .* 23456 +0500$" actual &&
 	git cat-file commit HEAD >actual &&
 	grep "author .* 34567 +0600$" actual &&

 	git rebase --onto HEAD^^ HEAD^ &&

 	git cat-file commit HEAD >actual &&
 	grep "author .* 34567 +0600$" actual
 '

 test_expect_success 'rebase with "From " line in commit message' '
 	git checkout -b preserve-from main~1 &&
 	cat >From_.msg <<EOF &&
 Somebody embedded an mbox in a commit message

 This is from so-and-so:

 From a@b Mon Sep 17 00:00:00 2001
 From: John Doe <nobody@example.com>
 Date: Sat, 11 Nov 2017 00:00:00 +0000
 Subject: not this message

 something
 EOF
 	>From_ &&
 	git add From_ &&
 	git commit -F From_.msg &&
 	git rebase main &&
 	git log -1 --pretty=format:%B >out &&
 	test_cmp From_.msg out
 '

 test_expect_success 'rebase --apply and --show-current-patch' '
 	test_create_repo conflict-apply &&
 	(
 		cd conflict-apply &&
 		test_commit init &&
 		echo one >>init.t &&
 		git commit -a -m one &&
 		echo two >>init.t &&
 		git commit -a -m two &&
 		git tag two &&
 		test_must_fail git rebase --apply -f --onto init HEAD^ &&
 		GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
 		grep "show.*$(git rev-parse two)" stderr
 	)
 '

 test_expect_success 'rebase --apply and .gitattributes' '
 	test_create_repo attributes &&
 	(
 		cd attributes &&
 		test_commit init &&
 		git config filter.test.clean "sed -e '\''s/smudged/clean/g'\''" &&
 		git config filter.test.smudge "sed -e '\''s/clean/smudged/g'\''" &&

 		test_commit second &&
 		git checkout -b test HEAD^ &&

 		echo "*.txt filter=test" >.gitattributes &&
 		git add .gitattributes &&
 		test_commit third &&

 		echo "This text is smudged." >a.txt &&
 		git add a.txt &&
 		test_commit fourth &&

 		git checkout -b removal HEAD^ &&
 		git rm .gitattributes &&
 		git add -u &&
 		test_commit fifth &&
 		git cherry-pick test &&

 		git checkout test &&
 		git rebase main &&
 		grep "smudged" a.txt &&

 		git checkout removal &&
 		git reset --hard &&
 		git rebase main &&
 		grep "clean" a.txt
 	)
 '

 test_expect_success 'rebase--merge.sh and --show-current-patch' '
 	test_create_repo conflict-merge &&
 	(
 		cd conflict-merge &&
 		test_commit init &&
 		echo one >>init.t &&
 		git commit -a -m one &&
 		echo two >>init.t &&
 		git commit -a -m two &&
 		git tag two &&
 		test_must_fail git rebase --merge --onto init HEAD^ &&
 		git rebase --show-current-patch >actual.patch &&
 		GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
 		grep "show.*REBASE_HEAD" stderr &&
 		test "$(git rev-parse REBASE_HEAD)" = "$(git rev-parse two)"
 	)
 '

 test_expect_success 'switch to branch checked out here' '
 	git checkout main &&
 	git rebase main main
 '

 test_expect_success 'switch to branch checked out elsewhere fails' '
 	test_when_finished "
 		git worktree remove wt1 &&
 		git worktree remove wt2 &&
 		git branch -d shared
 	" &&
 	git worktree add wt1 -b shared &&
 	git worktree add wt2 -f shared &&
 	# we test in both worktrees to ensure that works
 	# as expected with "first" and "next" worktrees
 	test_must_fail git -C wt1 rebase shared shared &&
 	test_must_fail git -C wt2 rebase shared shared
 '

 test_expect_success 'switch to branch not checked out' '
 	git checkout main &&
 	git branch other &&
 	git rebase main other
 '

 test_expect_success 'switch to non-branch detaches HEAD' '
 	git checkout main &&
 	old_main=$(git rev-parse HEAD) &&
 	git rebase First Second^0 &&
 	test_cmp_rev HEAD Second &&
 	test_cmp_rev main $old_main &&
 	test_must_fail git symbolic-ref HEAD
 '

 test_expect_success 'refuse to switch to branch checked out elsewhere' '
 	git checkout main &&
 	git worktree add wt &&
 	test_must_fail git -C wt rebase main main 2>err &&
 	test_grep "already used by worktree at" err
 '

 test_expect_success 'rebase when inside worktree subdirectory' '
 	git init main-wt &&
 	(
 		cd main-wt &&
 		git commit --allow-empty -m "initial" &&
 		mkdir -p foo/bar &&
 		test_commit foo/bar/baz &&
 		mkdir -p a/b &&
 		test_commit a/b/c &&
 		# create another branch for our other worktree
 		git branch other &&
 		git worktree add ../other-wt other &&
 		cd ../other-wt &&
 		# create and cd into a subdirectory
 		mkdir -p random/dir &&
 		cd random/dir &&
 		# now do the rebase
 		git rebase --onto HEAD^^ HEAD^  # drops the HEAD^ commit
 	)
 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2005 Amos Waterland
	#

	test_description='git rebase assorted tests

	This test runs git rebase and checks that the author information is not lost
	among other things.
	'
	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

	. ./test-lib.sh

	GIT_AUTHOR_NAME=author@name
	GIT_AUTHOR_EMAIL=bogus@email@address
	export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL

	test_expect_success 'prepare repository with topic branches' '
	test_commit "Add A." A First First &&
	git checkout -b force-3way &&
	echo Dummy >Y &&
	git update-index --add Y &&
	git commit -m "Add Y." &&
	git checkout -b filemove &&
	git reset --soft main &&
	mkdir D &&
	git mv A D/A &&
	git commit -m "Move A." &&
	git checkout -b my-topic-branch main &&
	test_commit "Add B." B Second Second &&
	git checkout -f main &&
	echo Third >>A &&
	git update-index A &&
	git commit -m "Modify A." &&
	git checkout -b side my-topic-branch &&
	echo Side >>C &&
	git add C &&
	git commit -m "Add C" &&
	git checkout -f my-topic-branch &&
	git tag topic
	'

	test_expect_success 'rebase on dirty worktree' '
	echo dirty >>A &&
	test_must_fail git rebase main
	'

	test_expect_success 'rebase on dirty cache' '
	git add A &&
	test_must_fail git rebase main
	'

	test_expect_success 'rebase against main' '
	git reset --hard HEAD &&
	git rebase main
	'

	test_expect_success 'rebase sets ORIG_HEAD to pre-rebase state' '
	git checkout -b orig-head topic &&
	pre="$(git rev-parse --verify HEAD)" &&
	git rebase main &&
	test_cmp_rev "$pre" ORIG_HEAD &&
	test_cmp_rev ! "$pre" HEAD
	'

	test_expect_success 'rebase, with <onto> and <upstream> specified as :/quuxery' '
	test_when_finished "git branch -D torebase" &&
	git checkout -b torebase my-topic-branch^ &&
	upstream=$(git rev-parse ":/Add B") &&
	onto=$(git rev-parse ":/Add A") &&
	git rebase --onto $onto $upstream &&
	git reset --hard my-topic-branch^ &&
	git rebase --onto ":/Add A" ":/Add B" &&
	git checkout my-topic-branch
	'

	test_expect_success 'the rebase operation should not have destroyed author information' '
	! (git log \| grep "Author:" \| grep "<>")
	'

	test_expect_success 'the rebase operation should not have destroyed author information (2)' "
	git log -1 \|
	grep 'Author: $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>'
	"

	test_expect_success 'HEAD was detached during rebase' '
	test $(git rev-parse HEAD@{1}) != $(git rev-parse my-topic-branch@{1})
	'

	test_expect_success 'rebase from ambiguous branch name' '
	git checkout -b topic side &&
	git rebase main
	'

	test_expect_success 'rebase off of the previous branch using "-"' '
	git checkout main &&
	git checkout HEAD^ &&
	git rebase @{-1} >expect.messages &&
	git merge-base main HEAD >expect.forkpoint &&

	git checkout main &&
	git checkout HEAD^ &&
	git rebase - >actual.messages &&
	git merge-base main HEAD >actual.forkpoint &&

	test_cmp expect.forkpoint actual.forkpoint &&
	# the next one is dubious---we may want to say "-",
	# instead of @{-1}, in the message
	test_cmp expect.messages actual.messages
	'

	test_expect_success 'rebase a single mode change' '
	git checkout main &&
	git branch -D topic &&
	echo 1 >X &&
	git add X &&
	test_tick &&
	git commit -m prepare &&
	git checkout -b modechange HEAD^ &&
	echo 1 >X &&
	git add X &&
	test_chmod +x A &&
	test_tick &&
	git commit -m modechange &&
	GIT_TRACE=1 git rebase main
	'

	test_expect_success 'rebase is not broken by diff.renames' '
	test_config diff.renames copies &&
	git checkout filemove &&
	GIT_TRACE=1 git rebase force-3way
	'

	test_expect_success 'setup: recover' '
	test_might_fail git rebase --abort &&
	git reset --hard &&
	git checkout modechange
	'

	test_expect_success 'Show verbose error when HEAD could not be detached' '
	>B &&
	test_when_finished "rm -f B" &&
	test_must_fail git rebase topic 2>output.err >output.out &&
	test_grep "The following untracked working tree files would be overwritten by checkout:" output.err &&
	test_grep B output.err
	'

	test_expect_success 'fail when upstream arg is missing and not on branch' '
	git checkout topic &&
	test_must_fail git rebase
	'

	test_expect_success 'fail when upstream arg is missing and not configured' '
	git checkout -b no-config topic &&
	test_must_fail git rebase
	'

	test_expect_success 'rebase works with format.useAutoBase' '
	test_config format.useAutoBase true &&
	git checkout topic &&
	git rebase main
	'

	test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg (--merge)' '
	git checkout -b default-base main &&
	git checkout -b default topic &&
	git config branch.default.remote . &&
	git config branch.default.merge refs/heads/default-base &&
	git rebase --merge &&
	git rev-parse --verify default-base >expect &&
	git rev-parse default~1 >actual &&
	test_cmp expect actual &&
	git checkout default-base &&
	git reset --hard HEAD^ &&
	git checkout default &&
	git rebase --merge &&
	git rev-parse --verify default-base >expect &&
	git rev-parse default~1 >actual &&
	test_cmp expect actual
	'

	test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg (--apply)' '
	git checkout -B default-base main &&
	git checkout -B default topic &&
	git config branch.default.remote . &&
	git config branch.default.merge refs/heads/default-base &&
	git rebase --apply &&
	git rev-parse --verify default-base >expect &&
	git rev-parse default~1 >actual &&
	test_cmp expect actual &&
	git checkout default-base &&
	git reset --hard HEAD^ &&
	git checkout default &&
	git rebase --apply &&
	git rev-parse --verify default-base >expect &&
	git rev-parse default~1 >actual &&
	test_cmp expect actual
	'

	test_expect_success 'cherry-picked commits and fork-point work together' '
	git checkout default-base &&
	echo Amended >A &&
	git commit -a --no-edit --amend &&
	test_commit B B &&
	test_commit new_B B "New B" &&
	test_commit C C &&
	git checkout default &&
	git reset --hard default-base@{4} &&
	test_commit D D &&
	git cherry-pick -2 default-base^ &&
	test_commit final_B B "Final B" &&
	git rebase &&
	echo Amended >expect &&
	test_cmp expect A &&
	echo "Final B" >expect &&
	test_cmp expect B &&
	echo C >expect &&
	test_cmp expect C &&
	echo D >expect &&
	test_cmp expect D
	'

	test_expect_success 'rebase --apply -q is quiet' '
	git checkout -b quiet topic &&
	git rebase --apply -q main >output.out 2>&1 &&
	test_must_be_empty output.out
	'

	test_expect_success 'rebase --merge -q is quiet' '
	git checkout -B quiet topic &&
	git rebase --merge -q main >output.out 2>&1 &&
	test_must_be_empty output.out
	'

	test_expect_success 'Rebase a commit that sprinkles CRs in' '
	(
	echo "One" &&
	echo "TwoQ" &&
	echo "Three" &&
	echo "FQur" &&
	echo "Five"
	) \| q_to_cr >CR &&
	git add CR &&
	test_tick &&
	git commit -a -m "A file with a line with CR" &&
	git tag file-with-cr &&
	git checkout HEAD^0 &&
	git rebase --onto HEAD^^ HEAD^ &&
	git diff --exit-code file-with-cr:CR HEAD:CR
	'

	test_expect_success 'rebase can copy notes' '
	git config notes.rewrite.rebase true &&
	git config notes.rewriteRef "refs/notes/*" &&
	test_commit n1 &&
	test_commit n2 &&
	test_commit n3 &&
	git notes add -m"a note" n3 &&
	git rebase --onto n1 n2 &&
	test "a note" = "$(git notes show HEAD)"
	'

	test_expect_success 'rebase -m can copy notes' '
	git reset --hard n3 &&
	git rebase -m --onto n1 n2 &&
	test "a note" = "$(git notes show HEAD)"
	'

	test_expect_success 'rebase commit with an ancient timestamp' '
	git reset --hard &&

	>old.one && git add old.one && test_tick &&
	git commit --date="@12345 +0400" -m "Old one" &&
	>old.two && git add old.two && test_tick &&
	git commit --date="@23456 +0500" -m "Old two" &&
	>old.three && git add old.three && test_tick &&
	git commit --date="@34567 +0600" -m "Old three" &&

	git cat-file commit HEAD^^ >actual &&
	grep "author .* 12345 +0400$" actual &&
	git cat-file commit HEAD^ >actual &&
	grep "author .* 23456 +0500$" actual &&
	git cat-file commit HEAD >actual &&
	grep "author .* 34567 +0600$" actual &&

	git rebase --onto HEAD^^ HEAD^ &&

	git cat-file commit HEAD >actual &&
	grep "author .* 34567 +0600$" actual
	'

	test_expect_success 'rebase with "From " line in commit message' '
	git checkout -b preserve-from main~1 &&
	cat >From_.msg <<EOF &&
	Somebody embedded an mbox in a commit message

	This is from so-and-so:

	From a@b Mon Sep 17 00:00:00 2001
	From: John Doe <nobody@example.com>
	Date: Sat, 11 Nov 2017 00:00:00 +0000
	Subject: not this message

	something
	EOF
	>From_ &&
	git add From_ &&
	git commit -F From_.msg &&
	git rebase main &&
	git log -1 --pretty=format:%B >out &&
	test_cmp From_.msg out
	'

	test_expect_success 'rebase --apply and --show-current-patch' '
	test_create_repo conflict-apply &&
	(
	cd conflict-apply &&
	test_commit init &&
	echo one >>init.t &&
	git commit -a -m one &&
	echo two >>init.t &&
	git commit -a -m two &&
	git tag two &&
	test_must_fail git rebase --apply -f --onto init HEAD^ &&
	GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
	grep "show.*$(git rev-parse two)" stderr
	)
	'

	test_expect_success 'rebase --apply and .gitattributes' '
	test_create_repo attributes &&
	(
	cd attributes &&
	test_commit init &&
	git config filter.test.clean "sed -e '\''s/smudged/clean/g'\''" &&
	git config filter.test.smudge "sed -e '\''s/clean/smudged/g'\''" &&

	test_commit second &&
	git checkout -b test HEAD^ &&

	echo "*.txt filter=test" >.gitattributes &&
	git add .gitattributes &&
	test_commit third &&

	echo "This text is smudged." >a.txt &&
	git add a.txt &&
	test_commit fourth &&

	git checkout -b removal HEAD^ &&
	git rm .gitattributes &&
	git add -u &&
	test_commit fifth &&
	git cherry-pick test &&

	git checkout test &&
	git rebase main &&
	grep "smudged" a.txt &&

	git checkout removal &&
	git reset --hard &&
	git rebase main &&
	grep "clean" a.txt
	)
	'

	test_expect_success 'rebase--merge.sh and --show-current-patch' '
	test_create_repo conflict-merge &&
	(
	cd conflict-merge &&
	test_commit init &&
	echo one >>init.t &&
	git commit -a -m one &&
	echo two >>init.t &&
	git commit -a -m two &&
	git tag two &&
	test_must_fail git rebase --merge --onto init HEAD^ &&
	git rebase --show-current-patch >actual.patch &&
	GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
	grep "show.*REBASE_HEAD" stderr &&
	test "$(git rev-parse REBASE_HEAD)" = "$(git rev-parse two)"
	)
	'

	test_expect_success 'switch to branch checked out here' '
	git checkout main &&
	git rebase main main
	'

	test_expect_success 'switch to branch checked out elsewhere fails' '
	test_when_finished "
	git worktree remove wt1 &&
	git worktree remove wt2 &&
	git branch -d shared
	" &&
	git worktree add wt1 -b shared &&
	git worktree add wt2 -f shared &&
	# we test in both worktrees to ensure that works
	# as expected with "first" and "next" worktrees
	test_must_fail git -C wt1 rebase shared shared &&
	test_must_fail git -C wt2 rebase shared shared
	'

	test_expect_success 'switch to branch not checked out' '
	git checkout main &&
	git branch other &&
	git rebase main other
	'

	test_expect_success 'switch to non-branch detaches HEAD' '
	git checkout main &&
	old_main=$(git rev-parse HEAD) &&
	git rebase First Second^0 &&
	test_cmp_rev HEAD Second &&
	test_cmp_rev main $old_main &&
	test_must_fail git symbolic-ref HEAD
	'

	test_expect_success 'refuse to switch to branch checked out elsewhere' '
	git checkout main &&
	git worktree add wt &&
	test_must_fail git -C wt rebase main main 2>err &&
	test_grep "already used by worktree at" err
	'

	test_expect_success 'rebase when inside worktree subdirectory' '
	git init main-wt &&
	(
	cd main-wt &&
	git commit --allow-empty -m "initial" &&
	mkdir -p foo/bar &&
	test_commit foo/bar/baz &&
	mkdir -p a/b &&
	test_commit a/b/c &&
	# create another branch for our other worktree
	git branch other &&
	git worktree add ../other-wt other &&
	cd ../other-wt &&
	# create and cd into a subdirectory
	mkdir -p random/dir &&
	cd random/dir &&
	# now do the rebase
	git rebase --onto HEAD^^ HEAD^ # drops the HEAD^ commit
	)
	'

	test_done