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

test_description='git checkout tests.

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

  ! [master] 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
  +*++ [master] Initial A one, A two

'

. ./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 master &&
	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 master &&
	rm -f one &&
	fill a c e > two &&
	git commit -a -m "Simple D one, M two" &&

	git checkout master
'

test_expect_success "checkout from non-existing branch" '

	git checkout -b delete-me master &&
	git update-ref -d --no-deref refs/heads/delete-me &&
	test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
	git checkout master &&
	test refs/heads/master = "$(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 master &&
	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 master &&
	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.master &&
	git diff --name-status master >current.master &&
	test_cmp expect.master current.master &&

	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 master && 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 master && 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 master: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 master && 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 master && git reset --hard && git clean -f &&

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

	cat <<-EOF >expect &&
	<<<<<<< simple
	a
	c
	e
	||||||| master
	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 master && 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 &&
	git checkout -f renamer && git clean -f &&
	git checkout renamer^ 2>messages &&
	test_i18ngrep "HEAD is now at 7329388" messages &&
	test_line_count = 1 messages &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 &&
	git checkout -f renamer && git clean -f &&
	GIT_TEST_GETTEXT_POISON= git checkout renamer^ 2>messages &&
	grep "HEAD is now at 7329388" messages &&
	test_line_count -gt 1 messages &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 master && git clean -f &&
	git checkout renamer^ &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 master && git clean -f &&
	git checkout ":/Initial" &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 master && git clean -f &&
	git checkout HEAD^0 &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 master &&
	git reset --hard &&
	git checkout master &&

	git checkout both &&
	H=$(git rev-parse --verify HEAD) &&
	M=$(git show-ref -s --verify refs/heads/master) &&
	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 master &&

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

	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 master &&

	mkdir subs &&
	(
		cd subs &&
		git 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 master &&
	mkdir -p subs &&
	(
		cd subs &&
		git checkout side -- bero
	) &&
	test -f subs/bero

'

test_expect_success \
    'checkout w/--track sets up tracking' '
    git config branch.autosetupmerge false &&
    git checkout master &&
    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 master &&
    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 master^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$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
'

test_expect_success 'checkout w/--track from tag fails' '
    git checkout master^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$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
'

test_expect_success 'detach a symbolic link HEAD' '
    git checkout master &&
    git config --bool core.prefersymlinkrefs yes &&
    git checkout side &&
    git checkout master &&
    it=$(git symbolic-ref HEAD) &&
    test "z$it" = zrefs/heads/master &&
    here=$(git rev-parse --verify refs/heads/master) &&
    git checkout side^ &&
    test "z$(git rev-parse --verify refs/heads/master)" = "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 master && 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 master && 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 reset --hard master &&
	git symbolic-ref HEAD refs/heads/master &&
	test_must_fail git checkout -b renamer side^ &&
	test $(git symbolic-ref HEAD) = refs/heads/master &&
	git diff --exit-code &&
	git diff --cached --exit-code

'

test_expect_success 'switch out of non-branch' '
	git reset --hard master &&
	git checkout master^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_done
debug log:

solving 5990299fc9 ...
found 5990299fc9 in https://80x24.org/mirrors/git.git

git@vger.kernel.org list mirror (unofficial, one of many)

Archives are clonable:
	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

Example config snippet for mirrors

Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.io/gmane.comp.version-control.git

 note: .onion URLs require Tor: https://www.torproject.org/

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git