1 files changed, 678 insertions, 0 deletions
diff --git a/t/t7201-co.sh b/t/t7201-co.sh
new file mode 100755
index 0000000..61ad47b
--- /dev/null
+++ b/t/t7201-co.sh
@@ -0,0 +1,678 @@
+#!/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_i18ngrep 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_i18ngrep "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 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 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