t/t7201-co.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2006 Junio C Hamano
 #

 test_description='git checkout tests.

 Creates main, forks renamer and side branches from it.
 Test switching across them.

   ! [main] Initial A one, A two
    * [renamer] Renamer R one->uno, M two
     ! [side] Side M one, D two, A three
      ! [simple] Simple D one, M two
   ----
      + [simple] Simple D one, M two
     +  [side] Side M one, D two, A three
    *   [renamer] Renamer R one->uno, M two
   +*++ [main] Initial A one, A two

 '

 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh

 test_tick

 fill () {
 	for i
 	do
 		echo "$i"
 	done
 }


 test_expect_success setup '
 	fill x y z >same &&
 	fill 1 2 3 4 5 6 7 8 >one &&
 	fill a b c d e >two &&
 	git add same one two &&
 	git commit -m "Initial A one, A two" &&

 	git checkout -b renamer &&
 	rm -f one &&
 	fill 1 3 4 5 6 7 8 >uno &&
 	git add uno &&
 	fill a b c d e f >two &&
 	git commit -a -m "Renamer R one->uno, M two" &&

 	git checkout -b side main &&
 	fill 1 2 3 4 5 6 7 >one &&
 	fill A B C D E >three &&
 	rm -f two &&
 	git update-index --add --remove one two three &&
 	git commit -m "Side M one, D two, A three" &&

 	git checkout -b simple main &&
 	rm -f one &&
 	fill a c e >two &&
 	git commit -a -m "Simple D one, M two" &&

 	git checkout main
 '

 test_expect_success 'checkout from non-existing branch' '
 	git checkout -b delete-me main &&
 	git update-ref -d --no-deref refs/heads/delete-me &&
 	test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
 	git checkout main &&
 	test refs/heads/main = "$(git symbolic-ref HEAD)"
 '

 test_expect_success 'checkout with dirty tree without -m' '
 	fill 0 1 2 3 4 5 6 7 8 >one &&
 	if git checkout side
 	then
 		echo Not happy
 		false
 	else
 		echo "happy - failed correctly"
 	fi
 '

 test_expect_success 'checkout with unrelated dirty tree without -m' '
 	git checkout -f main &&
 	fill 0 1 2 3 4 5 6 7 8 >same &&
 	cp same kept &&
 	git checkout side >messages &&
 	test_cmp same kept &&
 	printf "M\t%s\n" same >messages.expect &&
 	test_cmp messages.expect messages
 '

 test_expect_success 'checkout -m with dirty tree' '
 	git checkout -f main &&
 	git clean -f &&

 	fill 0 1 2 3 4 5 6 7 8 >one &&
 	git checkout -m side >messages &&

 	test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&

 	printf "M\t%s\n" one >expect.messages &&
 	test_cmp expect.messages messages &&

 	fill "M	one" "A	three" "D	two" >expect.main &&
 	git diff --name-status main >current.main &&
 	test_cmp expect.main current.main &&

 	fill "M	one" >expect.side &&
 	git diff --name-status side >current.side &&
 	test_cmp expect.side current.side &&

 	git diff --cached >current.index &&
 	test_must_be_empty current.index
 '

 test_expect_success 'checkout -m with dirty tree, renamed' '
 	git checkout -f main && git clean -f &&

 	fill 1 2 3 4 5 7 8 >one &&
 	if git checkout renamer
 	then
 		echo Not happy
 		false
 	else
 		echo "happy - failed correctly"
 	fi &&

 	git checkout -m renamer &&
 	fill 1 3 4 5 7 8 >expect &&
 	test_cmp expect uno &&
 	! test -f one &&
 	git diff --cached >current &&
 	test_must_be_empty current
 '

 test_expect_success 'checkout -m with merge conflict' '
 	git checkout -f main && git clean -f &&

 	fill 1 T 3 4 5 6 S 8 >one &&
 	if git checkout renamer
 	then
 		echo Not happy
 		false
 	else
 		echo "happy - failed correctly"
 	fi &&

 	git checkout -m renamer &&

 	git diff main:one :3:uno |
 	sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
 	fill d2 aT d7 aS >expect &&
 	test_cmp expect current &&
 	git diff --cached two >current &&
 	test_must_be_empty current
 '

 test_expect_success 'format of merge conflict from checkout -m' '
 	git checkout -f main &&
 	git clean -f &&

 	fill b d >two &&
 	git checkout -m simple &&

 	git ls-files >current &&
 	fill same two two two >expect &&
 	test_cmp expect current &&

 	cat <<-EOF >expect &&
 	<<<<<<< simple
 	a
 	c
 	e
 	=======
 	b
 	d
 	>>>>>>> local
 	EOF
 	test_cmp expect two
 '

 test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
 	git checkout -f main &&
 	git reset --hard &&
 	git clean -f &&

 	fill b d >two &&
 	git checkout --merge --conflict=diff3 simple &&

 	cat <<-EOF >expect &&
 	<<<<<<< simple
 	a
 	c
 	e
 	||||||| main
 	a
 	b
 	c
 	d
 	e
 	=======
 	b
 	d
 	>>>>>>> local
 	EOF
 	test_cmp expect two
 '

 test_expect_success 'switch to another branch while carrying a deletion' '
 	git checkout -f main &&
 	git reset --hard &&
 	git clean -f &&
 	git rm two &&

 	test_must_fail git checkout simple 2>errs &&
 	test_grep overwritten errs &&

 	test_must_fail git read-tree --quiet -m -u HEAD simple 2>errs &&
 	test_must_be_empty errs
 '

 test_expect_success 'checkout to detach HEAD (with advice declined)' '
 	git config advice.detachedHead false &&
 	rev=$(git rev-parse --short renamer^) &&
 	git checkout -f renamer &&
 	git clean -f &&
 	git checkout renamer^ 2>messages &&
 	test_grep "HEAD is now at $rev" messages &&
 	test_line_count = 1 messages &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	if git symbolic-ref HEAD >/dev/null 2>&1
 	then
 		echo "OOPS, HEAD is still symbolic???"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'checkout to detach HEAD' '
 	git config advice.detachedHead true &&
 	rev=$(git rev-parse --short renamer^) &&
 	git checkout -f renamer &&
 	git clean -f &&
 	git checkout renamer^ 2>messages &&
 	grep "HEAD is now at $rev" messages &&
 	test_line_count -gt 1 messages &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	if git symbolic-ref HEAD >/dev/null 2>&1
 	then
 		echo "OOPS, HEAD is still symbolic???"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'checkout to detach HEAD with branchname^' '
 	git checkout -f main &&
 	git clean -f &&
 	git checkout renamer^ &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	if git symbolic-ref HEAD >/dev/null 2>&1
 	then
 		echo "OOPS, HEAD is still symbolic???"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'checkout to detach HEAD with :/message' '
 	git checkout -f main &&
 	git clean -f &&
 	git checkout ":/Initial" &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	if git symbolic-ref HEAD >/dev/null 2>&1
 	then
 		echo "OOPS, HEAD is still symbolic???"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'checkout to detach HEAD with HEAD^0' '
 	git checkout -f main &&
 	git clean -f &&
 	git checkout HEAD^0 &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	if git symbolic-ref HEAD >/dev/null 2>&1
 	then
 		echo "OOPS, HEAD is still symbolic???"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'checkout with ambiguous tag/branch names' '
 	git tag both side &&
 	git branch both main &&
 	git reset --hard &&
 	git checkout main &&

 	git checkout both &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/main) &&
 	test "z$H" = "z$M" &&
 	name=$(git symbolic-ref HEAD 2>/dev/null) &&
 	test "z$name" = zrefs/heads/both
 '

 test_expect_success 'checkout with ambiguous tag/branch names' '
 	git reset --hard &&
 	git checkout main &&

 	git tag frotz side &&
 	git branch frotz main &&
 	git reset --hard &&
 	git checkout main &&

 	git checkout tags/frotz &&
 	H=$(git rev-parse --verify HEAD) &&
 	S=$(git show-ref -s --verify refs/heads/side) &&
 	test "z$H" = "z$S" &&
 	if name=$(git symbolic-ref HEAD 2>/dev/null)
 	then
 		echo "Bad -- should have detached"
 		false
 	else
 		: happy
 	fi
 '

 test_expect_success 'switch branches while in subdirectory' '
 	git reset --hard &&
 	git checkout main &&

 	mkdir subs &&
 	git -C subs checkout side &&
 	! test -f subs/one &&
 	rm -fr subs
 '

 test_expect_success 'checkout specific path while in subdirectory' '
 	git reset --hard &&
 	git checkout side &&
 	mkdir subs &&
 	>subs/bero &&
 	git add subs/bero &&
 	git commit -m "add subs/bero" &&

 	git checkout main &&
 	mkdir -p subs &&
 	git -C subs checkout side -- bero &&
 	test -f subs/bero
 '

 test_expect_success 'checkout w/--track sets up tracking' '
 	git config branch.autosetupmerge false &&
 	git checkout main &&
 	git checkout --track -b track1 &&
 	test "$(git config branch.track1.remote)" &&
 	test "$(git config branch.track1.merge)"
 '

 test_expect_success 'checkout w/autosetupmerge=always sets up tracking' '
 	test_when_finished git config branch.autosetupmerge false &&
 	git config branch.autosetupmerge always &&
 	git checkout main &&
 	git checkout -b track2 &&
 	test "$(git config branch.track2.remote)" &&
 	test "$(git config branch.track2.merge)"
 '

 test_expect_success 'checkout w/--track from non-branch HEAD fails' '
 	git checkout main^0 &&
 	test_must_fail git symbolic-ref HEAD &&
 	test_must_fail git checkout --track -b track &&
 	test_must_fail git rev-parse --verify track &&
 	test_must_fail git symbolic-ref HEAD &&
 	test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
 '

 test_expect_success 'checkout w/--track from tag fails' '
 	git checkout main^0 &&
 	test_must_fail git symbolic-ref HEAD &&
 	test_must_fail git checkout --track -b track frotz &&
 	test_must_fail git rev-parse --verify track &&
 	test_must_fail git symbolic-ref HEAD &&
 	test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
 '

 test_expect_success 'detach a symbolic link HEAD' '
 	git checkout main &&
 	git config --bool core.prefersymlinkrefs yes &&
 	git checkout side &&
 	git checkout main &&
 	it=$(git symbolic-ref HEAD) &&
 	test "z$it" = zrefs/heads/main &&
 	here=$(git rev-parse --verify refs/heads/main) &&
 	git checkout side^ &&
 	test "z$(git rev-parse --verify refs/heads/main)" = "z$here"
 '

 test_expect_success 'checkout with --track fakes a sensible -b <name>' '
 	git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" &&
 	git update-ref refs/remotes/origin/koala/bear renamer &&

 	git checkout --track origin/koala/bear &&
 	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
 	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&

 	git checkout main && git branch -D koala/bear &&

 	git checkout --track refs/remotes/origin/koala/bear &&
 	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
 	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&

 	git checkout main && git branch -D koala/bear &&

 	git checkout --track remotes/origin/koala/bear &&
 	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
 	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"
 '

 test_expect_success 'checkout with --track, but without -b, fails with too short tracked name' '
 	test_must_fail git checkout --track renamer
 '

 setup_conflicting_index () {
 	rm -f .git/index &&
 	O=$(echo original | git hash-object -w --stdin) &&
 	A=$(echo ourside | git hash-object -w --stdin) &&
 	B=$(echo theirside | git hash-object -w --stdin) &&
 	(
 		echo "100644 $A 0	fild" &&
 		echo "100644 $O 1	file" &&
 		echo "100644 $A 2	file" &&
 		echo "100644 $B 3	file" &&
 		echo "100644 $A 0	filf"
 	) | git update-index --index-info
 }

 test_expect_success 'checkout an unmerged path should fail' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	test_must_fail git checkout fild file filf &&
 	test_cmp sample fild &&
 	test_cmp sample filf &&
 	test_cmp sample file
 '

 test_expect_success 'checkout with an unmerged path can be ignored' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout -f fild file filf &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp sample file
 '

 test_expect_success 'checkout unmerged stage' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout --ours . &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp expect file &&
 	git checkout --theirs file &&
 	test ztheirside = "z$(cat file)"
 '

 test_expect_success 'checkout path with --merge from tree-ish is a no-no' '
 	setup_conflicting_index &&
 	test_must_fail git checkout -m HEAD -- file
 '

 test_expect_success 'checkout with --merge' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout -m -- fild file filf &&
 	(
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	) >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'checkout -m works after (mistaken) resolution' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	# resolve to something
 	git add file &&
 	git checkout --merge -- fild file filf &&
 	{
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	} >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'checkout -m works after (mistaken) resolution to remove' '
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	# resolve to remove
 	git rm file &&
 	git checkout --merge -- fild file filf &&
 	{
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	} >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'checkout with --merge, in diff3 -m style' '
 	git config merge.conflictstyle diff3 &&
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout -m -- fild file filf &&
 	(
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "||||||| base" &&
 		echo original &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	) >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'checkout --conflict=merge, overriding config' '
 	git config merge.conflictstyle diff3 &&
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout --conflict=merge -- fild file filf &&
 	(
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	) >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'checkout --conflict=diff3' '
 	test_unconfig merge.conflictstyle &&
 	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
 	cat sample >file &&
 	cat sample >filf &&
 	git checkout --conflict=diff3 -- fild file filf &&
 	(
 		echo "<<<<<<< ours" &&
 		echo ourside &&
 		echo "||||||| base" &&
 		echo original &&
 		echo "=======" &&
 		echo theirside &&
 		echo ">>>>>>> theirs"
 	) >merged &&
 	test_cmp expect fild &&
 	test_cmp expect filf &&
 	test_cmp merged file
 '

 test_expect_success 'failing checkout -b should not break working tree' '
 	git clean -fd &&  # Remove untracked files in the way
 	git reset --hard main &&
 	git symbolic-ref HEAD refs/heads/main &&
 	test_must_fail git checkout -b renamer side^ &&
 	test $(git symbolic-ref HEAD) = refs/heads/main &&
 	git diff --exit-code &&
 	git diff --cached --exit-code
 '

 test_expect_success 'switch out of non-branch' '
 	git reset --hard main &&
 	git checkout main^0 &&
 	echo modified >one &&
 	test_must_fail git checkout renamer 2>error.log &&
 	! grep "^Previous HEAD" error.log
 '

 (
  echo "#!$SHELL_PATH"
  cat <<\EOF
 O=$1 A=$2 B=$3
 cat "$A" >.tmp
 exec >"$A"
 echo '<<<<<<< filfre-theirs'
 cat "$B"
 echo '||||||| filfre-common'
 cat "$O"
 echo '======='
 cat ".tmp"
 echo '>>>>>>> filfre-ours'
 rm -f .tmp
 exit 1
 EOF
 ) >filfre.sh
 chmod +x filfre.sh

 test_expect_success 'custom merge driver with checkout -m' '
 	git reset --hard &&

 	git config merge.filfre.driver "./filfre.sh %O %A %B" &&
 	git config merge.filfre.name "Feel-free merge driver" &&
 	git config merge.filfre.recursive binary &&
 	echo "arm merge=filfre" >.gitattributes &&

 	git checkout -b left &&
 	echo neutral >arm &&
 	git add arm .gitattributes &&
 	test_tick &&
 	git commit -m neutral &&
 	git branch right &&

 	echo left >arm &&
 	test_tick &&
 	git commit -a -m left &&
 	git checkout right &&

 	echo right >arm &&
 	test_tick &&
 	git commit -a -m right &&

 	test_must_fail git merge left &&
 	(
 		for t in filfre-common left right
 		do
 			grep $t arm || exit 1
 		done
 	) &&

 	mv arm expect &&
 	git checkout -m arm &&
 	test_cmp expect arm
 '

 test_expect_success 'tracking info copied with autoSetupMerge=inherit' '
 	git reset --hard main &&
 	# default config does not copy tracking info
 	git checkout -b foo-no-inherit koala/bear &&
 	test_cmp_config "" --default "" branch.foo-no-inherit.remote &&
 	test_cmp_config "" --default "" branch.foo-no-inherit.merge &&
 	# with autoSetupMerge=inherit, we copy tracking info from koala/bear
 	test_config branch.autoSetupMerge inherit &&
 	git checkout -b foo koala/bear &&
 	test_cmp_config origin branch.foo.remote &&
 	test_cmp_config refs/heads/koala/bear branch.foo.merge &&
 	# no tracking info to inherit from main
 	git checkout -b main2 main &&
 	test_cmp_config "" --default "" branch.main2.remote &&
 	test_cmp_config "" --default "" branch.main2.merge
 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2006 Junio C Hamano
	#

	test_description='git checkout tests.

	Creates main, forks renamer and side branches from it.
	Test switching across them.

	! [main] Initial A one, A two
	* [renamer] Renamer R one->uno, M two
	! [side] Side M one, D two, A three
	! [simple] Simple D one, M two
	----
	+ [simple] Simple D one, M two
	+ [side] Side M one, D two, A three
	* [renamer] Renamer R one->uno, M two
	+*++ [main] Initial A one, A two

	'

	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

	. ./test-lib.sh

	test_tick

	fill () {
	for i
	do
	echo "$i"
	done
	}


	test_expect_success setup '
	fill x y z >same &&
	fill 1 2 3 4 5 6 7 8 >one &&
	fill a b c d e >two &&
	git add same one two &&
	git commit -m "Initial A one, A two" &&

	git checkout -b renamer &&
	rm -f one &&
	fill 1 3 4 5 6 7 8 >uno &&
	git add uno &&
	fill a b c d e f >two &&
	git commit -a -m "Renamer R one->uno, M two" &&

	git checkout -b side main &&
	fill 1 2 3 4 5 6 7 >one &&
	fill A B C D E >three &&
	rm -f two &&
	git update-index --add --remove one two three &&
	git commit -m "Side M one, D two, A three" &&

	git checkout -b simple main &&
	rm -f one &&
	fill a c e >two &&
	git commit -a -m "Simple D one, M two" &&

	git checkout main
	'

	test_expect_success 'checkout from non-existing branch' '
	git checkout -b delete-me main &&
	git update-ref -d --no-deref refs/heads/delete-me &&
	test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
	git checkout main &&
	test refs/heads/main = "$(git symbolic-ref HEAD)"
	'

	test_expect_success 'checkout with dirty tree without -m' '
	fill 0 1 2 3 4 5 6 7 8 >one &&
	if git checkout side
	then
	echo Not happy
	false
	else
	echo "happy - failed correctly"
	fi
	'

	test_expect_success 'checkout with unrelated dirty tree without -m' '
	git checkout -f main &&
	fill 0 1 2 3 4 5 6 7 8 >same &&
	cp same kept &&
	git checkout side >messages &&
	test_cmp same kept &&
	printf "M\t%s\n" same >messages.expect &&
	test_cmp messages.expect messages
	'

	test_expect_success 'checkout -m with dirty tree' '
	git checkout -f main &&
	git clean -f &&

	fill 0 1 2 3 4 5 6 7 8 >one &&
	git checkout -m side >messages &&

	test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&

	printf "M\t%s\n" one >expect.messages &&
	test_cmp expect.messages messages &&

	fill "M one" "A three" "D two" >expect.main &&
	git diff --name-status main >current.main &&
	test_cmp expect.main current.main &&

	fill "M one" >expect.side &&
	git diff --name-status side >current.side &&
	test_cmp expect.side current.side &&

	git diff --cached >current.index &&
	test_must_be_empty current.index
	'

	test_expect_success 'checkout -m with dirty tree, renamed' '
	git checkout -f main && git clean -f &&

	fill 1 2 3 4 5 7 8 >one &&
	if git checkout renamer
	then
	echo Not happy
	false
	else
	echo "happy - failed correctly"
	fi &&

	git checkout -m renamer &&
	fill 1 3 4 5 7 8 >expect &&
	test_cmp expect uno &&
	! test -f one &&
	git diff --cached >current &&
	test_must_be_empty current
	'

	test_expect_success 'checkout -m with merge conflict' '
	git checkout -f main && git clean -f &&

	fill 1 T 3 4 5 6 S 8 >one &&
	if git checkout renamer
	then
	echo Not happy
	false
	else
	echo "happy - failed correctly"
	fi &&

	git checkout -m renamer &&

	git diff main:one :3:uno \|
	sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
	fill d2 aT d7 aS >expect &&
	test_cmp expect current &&
	git diff --cached two >current &&
	test_must_be_empty current
	'

	test_expect_success 'format of merge conflict from checkout -m' '
	git checkout -f main &&
	git clean -f &&

	fill b d >two &&
	git checkout -m simple &&

	git ls-files >current &&
	fill same two two two >expect &&
	test_cmp expect current &&

	cat <<-EOF >expect &&
	<<<<<<< simple
	a
	c
	e
	=======
	b
	d
	>>>>>>> local
	EOF
	test_cmp expect two
	'

	test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
	git checkout -f main &&
	git reset --hard &&
	git clean -f &&

	fill b d >two &&
	git checkout --merge --conflict=diff3 simple &&

	cat <<-EOF >expect &&
	<<<<<<< simple
	a
	c
	e
	\|\|\|\|\|\|\| main
	a
	b
	c
	d
	e
	=======
	b
	d
	>>>>>>> local
	EOF
	test_cmp expect two
	'

	test_expect_success 'switch to another branch while carrying a deletion' '
	git checkout -f main &&
	git reset --hard &&
	git clean -f &&
	git rm two &&

	test_must_fail git checkout simple 2>errs &&
	test_grep overwritten errs &&

	test_must_fail git read-tree --quiet -m -u HEAD simple 2>errs &&
	test_must_be_empty errs
	'

	test_expect_success 'checkout to detach HEAD (with advice declined)' '
	git config advice.detachedHead false &&
	rev=$(git rev-parse --short renamer^) &&
	git checkout -f renamer &&
	git clean -f &&
	git checkout renamer^ 2>messages &&
	test_grep "HEAD is now at $rev" messages &&
	test_line_count = 1 messages &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	if git symbolic-ref HEAD >/dev/null 2>&1
	then
	echo "OOPS, HEAD is still symbolic???"
	false
	else
	: happy
	fi
	'

	test_expect_success 'checkout to detach HEAD' '
	git config advice.detachedHead true &&
	rev=$(git rev-parse --short renamer^) &&
	git checkout -f renamer &&
	git clean -f &&
	git checkout renamer^ 2>messages &&
	grep "HEAD is now at $rev" messages &&
	test_line_count -gt 1 messages &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	if git symbolic-ref HEAD >/dev/null 2>&1
	then
	echo "OOPS, HEAD is still symbolic???"
	false
	else
	: happy
	fi
	'

	test_expect_success 'checkout to detach HEAD with branchname^' '
	git checkout -f main &&
	git clean -f &&
	git checkout renamer^ &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	if git symbolic-ref HEAD >/dev/null 2>&1
	then
	echo "OOPS, HEAD is still symbolic???"
	false
	else
	: happy
	fi
	'

	test_expect_success 'checkout to detach HEAD with :/message' '
	git checkout -f main &&
	git clean -f &&
	git checkout ":/Initial" &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	if git symbolic-ref HEAD >/dev/null 2>&1
	then
	echo "OOPS, HEAD is still symbolic???"
	false
	else
	: happy
	fi
	'

	test_expect_success 'checkout to detach HEAD with HEAD^0' '
	git checkout -f main &&
	git clean -f &&
	git checkout HEAD^0 &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	if git symbolic-ref HEAD >/dev/null 2>&1
	then
	echo "OOPS, HEAD is still symbolic???"
	false
	else
	: happy
	fi
	'

	test_expect_success 'checkout with ambiguous tag/branch names' '
	git tag both side &&
	git branch both main &&
	git reset --hard &&
	git checkout main &&

	git checkout both &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/main) &&
	test "z$H" = "z$M" &&
	name=$(git symbolic-ref HEAD 2>/dev/null) &&
	test "z$name" = zrefs/heads/both
	'

	test_expect_success 'checkout with ambiguous tag/branch names' '
	git reset --hard &&
	git checkout main &&

	git tag frotz side &&
	git branch frotz main &&
	git reset --hard &&
	git checkout main &&

	git checkout tags/frotz &&
	H=$(git rev-parse --verify HEAD) &&
	S=$(git show-ref -s --verify refs/heads/side) &&
	test "z$H" = "z$S" &&
	if name=$(git symbolic-ref HEAD 2>/dev/null)
	then
	echo "Bad -- should have detached"
	false
	else
	: happy
	fi
	'

	test_expect_success 'switch branches while in subdirectory' '
	git reset --hard &&
	git checkout main &&

	mkdir subs &&
	git -C subs checkout side &&
	! test -f subs/one &&
	rm -fr subs
	'

	test_expect_success 'checkout specific path while in subdirectory' '
	git reset --hard &&
	git checkout side &&
	mkdir subs &&
	>subs/bero &&
	git add subs/bero &&
	git commit -m "add subs/bero" &&

	git checkout main &&
	mkdir -p subs &&
	git -C subs checkout side -- bero &&
	test -f subs/bero
	'

	test_expect_success 'checkout w/--track sets up tracking' '
	git config branch.autosetupmerge false &&
	git checkout main &&
	git checkout --track -b track1 &&
	test "$(git config branch.track1.remote)" &&
	test "$(git config branch.track1.merge)"
	'

	test_expect_success 'checkout w/autosetupmerge=always sets up tracking' '
	test_when_finished git config branch.autosetupmerge false &&
	git config branch.autosetupmerge always &&
	git checkout main &&
	git checkout -b track2 &&
	test "$(git config branch.track2.remote)" &&
	test "$(git config branch.track2.merge)"
	'

	test_expect_success 'checkout w/--track from non-branch HEAD fails' '
	git checkout main^0 &&
	test_must_fail git symbolic-ref HEAD &&
	test_must_fail git checkout --track -b track &&
	test_must_fail git rev-parse --verify track &&
	test_must_fail git symbolic-ref HEAD &&
	test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
	'

	test_expect_success 'checkout w/--track from tag fails' '
	git checkout main^0 &&
	test_must_fail git symbolic-ref HEAD &&
	test_must_fail git checkout --track -b track frotz &&
	test_must_fail git rev-parse --verify track &&
	test_must_fail git symbolic-ref HEAD &&
	test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
	'

	test_expect_success 'detach a symbolic link HEAD' '
	git checkout main &&
	git config --bool core.prefersymlinkrefs yes &&
	git checkout side &&
	git checkout main &&
	it=$(git symbolic-ref HEAD) &&
	test "z$it" = zrefs/heads/main &&
	here=$(git rev-parse --verify refs/heads/main) &&
	git checkout side^ &&
	test "z$(git rev-parse --verify refs/heads/main)" = "z$here"
	'

	test_expect_success 'checkout with --track fakes a sensible -b <name>' '
	git config remote.origin.fetch "+refs/heads/:refs/remotes/origin/" &&
	git update-ref refs/remotes/origin/koala/bear renamer &&

	git checkout --track origin/koala/bear &&
	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&

	git checkout main && git branch -D koala/bear &&

	git checkout --track refs/remotes/origin/koala/bear &&
	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&

	git checkout main && git branch -D koala/bear &&

	git checkout --track remotes/origin/koala/bear &&
	test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
	test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"
	'

	test_expect_success 'checkout with --track, but without -b, fails with too short tracked name' '
	test_must_fail git checkout --track renamer
	'

	setup_conflicting_index () {
	rm -f .git/index &&
	O=$(echo original \| git hash-object -w --stdin) &&
	A=$(echo ourside \| git hash-object -w --stdin) &&
	B=$(echo theirside \| git hash-object -w --stdin) &&
	(
	echo "100644 $A 0 fild" &&
	echo "100644 $O 1 file" &&
	echo "100644 $A 2 file" &&
	echo "100644 $B 3 file" &&
	echo "100644 $A 0 filf"
	) \| git update-index --index-info
	}

	test_expect_success 'checkout an unmerged path should fail' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	test_must_fail git checkout fild file filf &&
	test_cmp sample fild &&
	test_cmp sample filf &&
	test_cmp sample file
	'

	test_expect_success 'checkout with an unmerged path can be ignored' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout -f fild file filf &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp sample file
	'

	test_expect_success 'checkout unmerged stage' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout --ours . &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp expect file &&
	git checkout --theirs file &&
	test ztheirside = "z$(cat file)"
	'

	test_expect_success 'checkout path with --merge from tree-ish is a no-no' '
	setup_conflicting_index &&
	test_must_fail git checkout -m HEAD -- file
	'

	test_expect_success 'checkout with --merge' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout -m -- fild file filf &&
	(
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	) >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'checkout -m works after (mistaken) resolution' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	# resolve to something
	git add file &&
	git checkout --merge -- fild file filf &&
	{
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	} >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'checkout -m works after (mistaken) resolution to remove' '
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	# resolve to remove
	git rm file &&
	git checkout --merge -- fild file filf &&
	{
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	} >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'checkout with --merge, in diff3 -m style' '
	git config merge.conflictstyle diff3 &&
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout -m -- fild file filf &&
	(
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "\|\|\|\|\|\|\| base" &&
	echo original &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	) >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'checkout --conflict=merge, overriding config' '
	git config merge.conflictstyle diff3 &&
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout --conflict=merge -- fild file filf &&
	(
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	) >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'checkout --conflict=diff3' '
	test_unconfig merge.conflictstyle &&
	setup_conflicting_index &&
	echo "none of the above" >sample &&
	echo ourside >expect &&
	cat sample >fild &&
	cat sample >file &&
	cat sample >filf &&
	git checkout --conflict=diff3 -- fild file filf &&
	(
	echo "<<<<<<< ours" &&
	echo ourside &&
	echo "\|\|\|\|\|\|\| base" &&
	echo original &&
	echo "=======" &&
	echo theirside &&
	echo ">>>>>>> theirs"
	) >merged &&
	test_cmp expect fild &&
	test_cmp expect filf &&
	test_cmp merged file
	'

	test_expect_success 'failing checkout -b should not break working tree' '
	git clean -fd && # Remove untracked files in the way
	git reset --hard main &&
	git symbolic-ref HEAD refs/heads/main &&
	test_must_fail git checkout -b renamer side^ &&
	test $(git symbolic-ref HEAD) = refs/heads/main &&
	git diff --exit-code &&
	git diff --cached --exit-code
	'

	test_expect_success 'switch out of non-branch' '
	git reset --hard main &&
	git checkout main^0 &&
	echo modified >one &&
	test_must_fail git checkout renamer 2>error.log &&
	! grep "^Previous HEAD" error.log
	'

	(
	echo "#!$SHELL_PATH"
	cat <<\EOF
	O=$1 A=$2 B=$3
	cat "$A" >.tmp
	exec >"$A"
	echo '<<<<<<< filfre-theirs'
	cat "$B"
	echo '\|\|\|\|\|\|\| filfre-common'
	cat "$O"
	echo '======='
	cat ".tmp"
	echo '>>>>>>> filfre-ours'
	rm -f .tmp
	exit 1
	EOF
	) >filfre.sh
	chmod +x filfre.sh

	test_expect_success 'custom merge driver with checkout -m' '
	git reset --hard &&

	git config merge.filfre.driver "./filfre.sh %O %A %B" &&
	git config merge.filfre.name "Feel-free merge driver" &&
	git config merge.filfre.recursive binary &&
	echo "arm merge=filfre" >.gitattributes &&

	git checkout -b left &&
	echo neutral >arm &&
	git add arm .gitattributes &&
	test_tick &&
	git commit -m neutral &&
	git branch right &&

	echo left >arm &&
	test_tick &&
	git commit -a -m left &&
	git checkout right &&

	echo right >arm &&
	test_tick &&
	git commit -a -m right &&

	test_must_fail git merge left &&
	(
	for t in filfre-common left right
	do
	grep $t arm \|\| exit 1
	done
	) &&

	mv arm expect &&
	git checkout -m arm &&
	test_cmp expect arm
	'

	test_expect_success 'tracking info copied with autoSetupMerge=inherit' '
	git reset --hard main &&
	# default config does not copy tracking info
	git checkout -b foo-no-inherit koala/bear &&
	test_cmp_config "" --default "" branch.foo-no-inherit.remote &&
	test_cmp_config "" --default "" branch.foo-no-inherit.merge &&
	# with autoSetupMerge=inherit, we copy tracking info from koala/bear
	test_config branch.autoSetupMerge inherit &&
	git checkout -b foo koala/bear &&
	test_cmp_config origin branch.foo.remote &&
	test_cmp_config refs/heads/koala/bear branch.foo.merge &&
	# no tracking info to inherit from main
	git checkout -b main2 main &&
	test_cmp_config "" --default "" branch.main2.remote &&
	test_cmp_config "" --default "" branch.main2.merge
	'

	test_done