[thirdparty/git.git] / t / t0600-reffiles-backend.sh

#!/bin/sh

test_description='Test reffiles backend'

GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
GIT_TEST_DEFAULT_REF_FORMAT=files
export GIT_TEST_DEFAULT_REF_FORMAT

TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh

test_expect_success 'setup' '
	git commit --allow-empty -m Initial &&
	C=$(git rev-parse HEAD) &&
	git commit --allow-empty -m Second &&
	D=$(git rev-parse HEAD) &&
	git commit --allow-empty -m Third &&
	E=$(git rev-parse HEAD)
'

test_expect_success 'empty directory should not fool rev-parse' '
	prefix=refs/e-rev-parse &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	echo "$C" >expected &&
	git rev-parse $prefix/foo >actual &&
	test_cmp expected actual
'

test_expect_success 'empty directory should not fool for-each-ref' '
	prefix=refs/e-for-each-ref &&
	git update-ref $prefix/foo $C &&
	git for-each-ref $prefix >expected &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	git for-each-ref $prefix >actual &&
	test_cmp expected actual
'

test_expect_success 'empty directory should not fool create' '
	prefix=refs/e-create &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "create %s $C\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'empty directory should not fool verify' '
	prefix=refs/e-verify &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "verify %s $C\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'empty directory should not fool 1-arg update' '
	prefix=refs/e-update-1 &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "update %s $D\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'empty directory should not fool 2-arg update' '
	prefix=refs/e-update-2 &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "update %s $D $C\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'empty directory should not fool 0-arg delete' '
	prefix=refs/e-delete-0 &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "delete %s\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'empty directory should not fool 1-arg delete' '
	prefix=refs/e-delete-1 &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	mkdir -p .git/$prefix/foo/bar/baz &&
	printf "delete %s $C\n" $prefix/foo |
	git update-ref --stdin
'

test_expect_success 'non-empty directory blocks create' '
	prefix=refs/ne-create &&
	mkdir -p .git/$prefix/foo/bar &&
	: >.git/$prefix/foo/bar/baz.lock &&
	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/foo$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ
	EOF
	printf "%s\n" "update $prefix/foo $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ
	EOF
	printf "%s\n" "update $prefix/foo $D $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err
'

test_expect_success 'broken reference blocks create' '
	prefix=refs/broken-create &&
	mkdir -p .git/$prefix &&
	echo "gobbledigook" >.git/$prefix/foo &&
	test_when_finished "rm -f .git/$prefix/foo" &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
	EOF
	printf "%s\n" "update $prefix/foo $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
	EOF
	printf "%s\n" "update $prefix/foo $D $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err
'

test_expect_success 'non-empty directory blocks indirect create' '
	prefix=refs/ne-indirect-create &&
	git symbolic-ref $prefix/symref $prefix/foo &&
	mkdir -p .git/$prefix/foo/bar &&
	: >.git/$prefix/foo/bar/baz.lock &&
	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/symref$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ
	EOF
	printf "%s\n" "update $prefix/symref $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ
	EOF
	printf "%s\n" "update $prefix/symref $D $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err
'

test_expect_success 'broken reference blocks indirect create' '
	prefix=refs/broken-indirect-create &&
	git symbolic-ref $prefix/symref $prefix/foo &&
	echo "gobbledigook" >.git/$prefix/foo &&
	test_when_finished "rm -f .git/$prefix/foo" &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
	EOF
	printf "%s\n" "update $prefix/symref $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err &&
	cat >expected <<-EOF &&
	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
	EOF
	printf "%s\n" "update $prefix/symref $D $C" |
	test_must_fail git update-ref --stdin 2>output.err &&
	test_cmp expected output.err
'

test_expect_success 'no bogus intermediate values during delete' '
	prefix=refs/slow-transaction &&
	# Set up a reference with differing loose and packed versions:
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	git update-ref $prefix/foo $D &&
	# Now try to update the reference, but hold the `packed-refs` lock
	# for a while to see what happens while the process is blocked:
	: >.git/packed-refs.lock &&
	test_when_finished "rm -f .git/packed-refs.lock" &&
	{
		# Note: the following command is intentionally run in the
		# background. We increase the timeout so that `update-ref`
		# attempts to acquire the `packed-refs` lock for much longer
		# than it takes for us to do the check then delete it:
		git -c core.packedrefstimeout=30000 update-ref -d $prefix/foo &
	} &&
	pid2=$! &&
	# Give update-ref plenty of time to get to the point where it tries
	# to lock packed-refs:
	sleep 1 &&
	# Make sure that update-ref did not complete despite the lock:
	kill -0 $pid2 &&
	# Verify that the reference still has its old value:
	sha1=$(git rev-parse --verify --quiet $prefix/foo || echo undefined) &&
	case "$sha1" in
	$D)
		# This is what we hope for; it means that nothing
		# user-visible has changed yet.
		: ;;
	undefined)
		# This is not correct; it means the deletion has happened
		# already even though update-ref should not have been
		# able to acquire the lock yet.
		echo "$prefix/foo deleted prematurely" &&
		break
		;;
	$C)
		# This value should never be seen. Probably the loose
		# reference has been deleted but the packed reference
		# is still there:
		echo "$prefix/foo incorrectly observed to be C" &&
		break
		;;
	*)
		# WTF?
		echo "unexpected value observed for $prefix/foo: $sha1" &&
		break
		;;
	esac >out &&
	rm -f .git/packed-refs.lock &&
	wait $pid2 &&
	test_must_be_empty out &&
	test_must_fail git rev-parse --verify --quiet $prefix/foo
'

test_expect_success 'delete fails cleanly if packed-refs file is locked' '
	prefix=refs/locked-packed-refs &&
	# Set up a reference with differing loose and packed versions:
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	git update-ref $prefix/foo $D &&
	git for-each-ref $prefix >unchanged &&
	# Now try to delete it while the `packed-refs` lock is held:
	: >.git/packed-refs.lock &&
	test_when_finished "rm -f .git/packed-refs.lock" &&
	test_must_fail git update-ref -d $prefix/foo >out 2>err &&
	git for-each-ref $prefix >actual &&
	test_grep "Unable to create $SQ.*packed-refs.lock$SQ: " err &&
	test_cmp unchanged actual
'

test_expect_success 'delete fails cleanly if packed-refs.new write fails' '
	# Setup and expectations are similar to the test above.
	prefix=refs/failed-packed-refs &&
	git update-ref $prefix/foo $C &&
	git pack-refs --all &&
	git update-ref $prefix/foo $D &&
	git for-each-ref $prefix >unchanged &&
	# This should not happen in practice, but it is an easy way to get a
	# reliable error (we open with create_tempfile(), which uses O_EXCL).
	: >.git/packed-refs.new &&
	test_when_finished "rm -f .git/packed-refs.new" &&
	test_must_fail git update-ref -d $prefix/foo &&
	git for-each-ref $prefix >actual &&
	test_cmp unchanged actual
'

RWT="test-tool ref-store worktree:wt"
RMAIN="test-tool ref-store worktree:main"

test_expect_success 'setup worktree' '
	test_commit first &&
	git worktree add -b wt-main wt &&
	(
		cd wt &&
		test_commit second
	)
'

# Some refs (refs/bisect/*, pseudorefs) are kept per worktree, so they should
# only appear in the for-each-reflog output if it is called from the correct
# worktree, which is exercised in this test. This test is poorly written for
# mulitple reasons: 1) it creates invalidly formatted log entres. 2) it uses
# direct FS access for creating the reflogs. 3) PSEUDO-WT and refs/bisect/random
# do not create reflogs by default, so it is not testing a realistic scenario.
test_expect_success 'for_each_reflog()' '
	echo $ZERO_OID >.git/logs/PSEUDO_MAIN_HEAD &&
	mkdir -p     .git/logs/refs/bisect &&
	echo $ZERO_OID >.git/logs/refs/bisect/random &&

	echo $ZERO_OID >.git/worktrees/wt/logs/PSEUDO_WT_HEAD &&
	mkdir -p     .git/worktrees/wt/logs/refs/bisect &&
	echo $ZERO_OID >.git/worktrees/wt/logs/refs/bisect/wt-random &&

	$RWT for-each-reflog >actual &&
	cat >expected <<-\EOF &&
	HEAD
	PSEUDO_WT_HEAD
	refs/bisect/wt-random
	refs/heads/main
	refs/heads/wt-main
	EOF
	test_cmp expected actual &&

	$RMAIN for-each-reflog >actual &&
	cat >expected <<-\EOF &&
	HEAD
	PSEUDO_MAIN_HEAD
	refs/bisect/random
	refs/heads/main
	refs/heads/wt-main
	EOF
	test_cmp expected actual
'

# Triggering the bug detected by this test requires a newline to fall
# exactly BUFSIZ-1 bytes from the end of the file. We don't know
# what that value is, since it's platform dependent. However, if
# we choose some value N, we also catch any D which divides N evenly
# (since we will read backwards in chunks of D). So we choose 8K,
# which catches glibc (with an 8K BUFSIZ) and *BSD (1K).
#
# Each line is 114 characters, so we need 75 to still have a few before the
# last 8K. The 89-character padding on the final entry lines up our
# newline exactly.
test_expect_success SHA1 'parsing reverse reflogs at BUFSIZ boundaries' '
	git checkout -b reflogskip &&
	zf=$(test_oid zero_2) &&
	ident="abc <xyz> 0000000001 +0000" &&
	for i in $(test_seq 1 75); do
		printf "$zf%02d $zf%02d %s\t" $i $(($i+1)) "$ident" &&
		if test $i = 75; then
			for j in $(test_seq 1 89); do
				printf X || return 1
			done
		else
			printf X
		fi &&
		printf "\n" || return 1
	done >.git/logs/refs/heads/reflogskip &&
	git rev-parse reflogskip@{73} >actual &&
	echo ${zf}03 >expect &&
	test_cmp expect actual
'

# This test takes a lock on an individual ref; this is not supported in
# reftable.
test_expect_success 'reflog expire operates on symref not referrent' '
	git branch --create-reflog the_symref &&
	git branch --create-reflog referrent &&
	git update-ref referrent HEAD &&
	git symbolic-ref refs/heads/the_symref refs/heads/referrent &&
	test_when_finished "rm -f .git/refs/heads/referrent.lock" &&
	touch .git/refs/heads/referrent.lock &&
	git reflog expire --expire=all the_symref
'

test_expect_success 'empty reflog' '
	test_when_finished "rm -rf empty" &&
	git init empty &&
	test_commit -C empty A &&
	>empty/.git/logs/refs/heads/foo &&
	git -C empty reflog expire --all 2>err &&
	test_must_be_empty err
'

test_expect_success SYMLINKS 'ref resolution not confused by broken symlinks' '
       ln -s does-not-exist .git/refs/heads/broken &&
       test_must_fail git rev-parse --verify broken
'

test_expect_success 'log diagnoses bogus HEAD hash' '
	git init empty &&
	test_when_finished "rm -rf empty" &&
	echo 1234abcd >empty/.git/refs/heads/main &&
	test_must_fail git -C empty log 2>stderr &&
	test_grep broken stderr
'

test_expect_success 'log diagnoses bogus HEAD symref' '
	git init empty &&
	test-tool -C empty ref-store main create-symref HEAD refs/heads/invalid.lock &&
	test_must_fail git -C empty log 2>stderr &&
	test_grep broken stderr &&
	test_must_fail git -C empty log --default totally-bogus 2>stderr &&
	test_grep broken stderr
'

test_expect_success 'empty directory removal' '
	git branch d1/d2/r1 HEAD &&
	git branch d1/r2 HEAD &&
	test_path_is_file .git/refs/heads/d1/d2/r1 &&
	test_path_is_file .git/logs/refs/heads/d1/d2/r1 &&
	git branch -d d1/d2/r1 &&
	test_must_fail git show-ref --verify -q refs/heads/d1/d2 &&
	test_must_fail git show-ref --verify -q logs/refs/heads/d1/d2 &&
	test_path_is_file .git/refs/heads/d1/r2 &&
	test_path_is_file .git/logs/refs/heads/d1/r2
'

test_expect_success 'symref empty directory removal' '
	git branch e1/e2/r1 HEAD &&
	git branch e1/r2 HEAD &&
	git checkout e1/e2/r1 &&
	test_when_finished "git checkout main" &&
	test_path_is_file .git/refs/heads/e1/e2/r1 &&
	test_path_is_file .git/logs/refs/heads/e1/e2/r1 &&
	git update-ref -d HEAD &&
	test_must_fail git show-ref --verify -q refs/heads/e1/e2 &&
	test_must_fail git show-ref --verify -q logs/refs/heads/e1/e2 &&
	test_path_is_file .git/refs/heads/e1/r2 &&
	test_path_is_file .git/logs/refs/heads/e1/r2 &&
	test_path_is_file .git/logs/HEAD
'

test_expect_success 'directory not created deleting packed ref' '
	git branch d1/d2/r1 HEAD &&
	git pack-refs --all &&
	test_path_is_missing .git/refs/heads/d1/d2 &&
	git update-ref -d refs/heads/d1/d2/r1 &&
	test_path_is_missing .git/refs/heads/d1/d2 &&
	test_path_is_missing .git/refs/heads/d1
'

test_expect_success SYMLINKS 'git branch -m u v should fail when the reflog for u is a symlink' '
	git branch --create-reflog u &&
	mv .git/logs/refs/heads/u real-u &&
	ln -s real-u .git/logs/refs/heads/u &&
	test_must_fail git branch -m u v
'

test_expect_success SYMLINKS 'git branch -m with symlinked .git/refs' '
	test_when_finished "rm -rf subdir" &&
	git init --bare subdir &&

	rm -rf subdir/refs subdir/objects subdir/packed-refs &&
	ln -s ../.git/refs subdir/refs &&
	ln -s ../.git/objects subdir/objects &&
	ln -s ../.git/packed-refs subdir/packed-refs &&

	git -C subdir rev-parse --absolute-git-dir >subdir.dir &&
	git rev-parse --absolute-git-dir >our.dir &&
	! test_cmp subdir.dir our.dir &&

	git -C subdir log &&
	git -C subdir branch rename-src &&
	git rev-parse rename-src >expect &&
	git -C subdir branch -m rename-src rename-dest &&
	git rev-parse rename-dest >actual &&
	test_cmp expect actual &&
	git branch -D rename-dest
'

test_expect_success MINGW,SYMLINKS_WINDOWS 'rebase when .git/logs is a symlink' '
	git checkout main &&
	mv .git/logs actual_logs &&
	cmd //c "mklink /D .git\logs ..\actual_logs" &&
	git rebase -f HEAD^ &&
	test -L .git/logs &&
	rm .git/logs &&
	mv actual_logs .git/logs
'

test_expect_success POSIXPERM 'git reflog expire honors core.sharedRepository' '
	umask 077 &&
	git config core.sharedRepository group &&
	git reflog expire --all &&
	actual="$(ls -l .git/logs/refs/heads/main)" &&
	case "$actual" in
	-rw-rw-*)
		: happy
		;;
	*)
		echo Ooops, .git/logs/refs/heads/main is not 066x [$actual]
		false
		;;
	esac
'

test_done
Commit	Line	Data
102d7154 JC	1	#!/bin/sh
	2
	3	test_description='Test reffiles backend'
	4
	5	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
	6	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
ca13c3e9 PS	7	GIT_TEST_DEFAULT_REF_FORMAT=files
ca13c3e9 PS	8	export GIT_TEST_DEFAULT_REF_FORMAT
102d7154 JC	9
	10	TEST_PASSES_SANITIZE_LEAK=true
	11	. ./test-lib.sh
	12
102d7154 JC	13	test_expect_success 'setup' '
	14	git commit --allow-empty -m Initial &&
	15	C=$(git rev-parse HEAD) &&
	16	git commit --allow-empty -m Second &&
	17	D=$(git rev-parse HEAD) &&
	18	git commit --allow-empty -m Third &&
	19	E=$(git rev-parse HEAD)
	20	'
	21
	22	test_expect_success 'empty directory should not fool rev-parse' '
	23	prefix=refs/e-rev-parse &&
	24	git update-ref $prefix/foo $C &&
	25	git pack-refs --all &&
	26	mkdir -p .git/$prefix/foo/bar/baz &&
	27	echo "$C" >expected &&
	28	git rev-parse $prefix/foo >actual &&
	29	test_cmp expected actual
	30	'
	31
	32	test_expect_success 'empty directory should not fool for-each-ref' '
	33	prefix=refs/e-for-each-ref &&
	34	git update-ref $prefix/foo $C &&
	35	git for-each-ref $prefix >expected &&
	36	git pack-refs --all &&
	37	mkdir -p .git/$prefix/foo/bar/baz &&
	38	git for-each-ref $prefix >actual &&
	39	test_cmp expected actual
	40	'
	41
	42	test_expect_success 'empty directory should not fool create' '
	43	prefix=refs/e-create &&
	44	mkdir -p .git/$prefix/foo/bar/baz &&
	45	printf "create %s $C\n" $prefix/foo \|
	46	git update-ref --stdin
	47	'
	48
	49	test_expect_success 'empty directory should not fool verify' '
	50	prefix=refs/e-verify &&
	51	git update-ref $prefix/foo $C &&
	52	git pack-refs --all &&
	53	mkdir -p .git/$prefix/foo/bar/baz &&
	54	printf "verify %s $C\n" $prefix/foo \|
	55	git update-ref --stdin
	56	'
	57
	58	test_expect_success 'empty directory should not fool 1-arg update' '
	59	prefix=refs/e-update-1 &&
	60	git update-ref $prefix/foo $C &&
	61	git pack-refs --all &&
	62	mkdir -p .git/$prefix/foo/bar/baz &&
	63	printf "update %s $D\n" $prefix/foo \|
	64	git update-ref --stdin
	65	'
	66
	67	test_expect_success 'empty directory should not fool 2-arg update' '
	68	prefix=refs/e-update-2 &&
	69	git update-ref $prefix/foo $C &&
	70	git pack-refs --all &&
	71	mkdir -p .git/$prefix/foo/bar/baz &&
	72	printf "update %s $D $C\n" $prefix/foo \|
	73	git update-ref --stdin
	74	'
	75
	76	test_expect_success 'empty directory should not fool 0-arg delete' '
77	prefix=refs/e-delete-0 &&
78	git update-ref $prefix/foo $C &&
79	git pack-refs --all &&
80	mkdir -p .git/$prefix/foo/bar/baz &&
81	printf "delete %s\n" $prefix/foo \|
82	git update-ref --stdin
83	'
84
85	test_expect_success 'empty directory should not fool 1-arg delete' '
86	prefix=refs/e-delete-1 &&
87	git update-ref $prefix/foo $C &&
88	git pack-refs --all &&
89	mkdir -p .git/$prefix/foo/bar/baz &&
90	printf "delete %s $C\n" $prefix/foo \|
91	git update-ref --stdin
92	'
93
94	test_expect_success 'non-empty directory blocks create' '
95	prefix=refs/ne-create &&
96	mkdir -p .git/$prefix/foo/bar &&
97	: >.git/$prefix/foo/bar/baz.lock &&
98	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
99	cat >expected <<-EOF &&
100	fatal: cannot lock ref $SQ$prefix/foo$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ
101	EOF
102	printf "%s\n" "update $prefix/foo $C" \|
103	test_must_fail git update-ref --stdin 2>output.err &&
104	test_cmp expected output.err &&
105	cat >expected <<-EOF &&
106	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ
107	EOF
108	printf "%s\n" "update $prefix/foo $D $C" \|
109	test_must_fail git update-ref --stdin 2>output.err &&
110	test_cmp expected output.err
111	'
112
113	test_expect_success 'broken reference blocks create' '
114	prefix=refs/broken-create &&
115	mkdir -p .git/$prefix &&
116	echo "gobbledigook" >.git/$prefix/foo &&
117	test_when_finished "rm -f .git/$prefix/foo" &&
118	cat >expected <<-EOF &&
119	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
120	EOF
121	printf "%s\n" "update $prefix/foo $C" \|
122	test_must_fail git update-ref --stdin 2>output.err &&
123	test_cmp expected output.err &&
124	cat >expected <<-EOF &&
125	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
126	EOF
127	printf "%s\n" "update $prefix/foo $D $C" \|
128	test_must_fail git update-ref --stdin 2>output.err &&
129	test_cmp expected output.err
130	'
131
132	test_expect_success 'non-empty directory blocks indirect create' '
133	prefix=refs/ne-indirect-create &&
134	git symbolic-ref $prefix/symref $prefix/foo &&
135	mkdir -p .git/$prefix/foo/bar &&
136	: >.git/$prefix/foo/bar/baz.lock &&
137	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
138	cat >expected <<-EOF &&
139	fatal: cannot lock ref $SQ$prefix/symref$SQ: there is a non-empty directory $SQ.git/$prefix/foo$SQ blocking reference $SQ$prefix/foo$SQ
140	EOF
141	printf "%s\n" "update $prefix/symref $C" \|
142	test_must_fail git update-ref --stdin 2>output.err &&
143	test_cmp expected output.err &&
144	cat >expected <<-EOF &&
145	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ
146	EOF
147	printf "%s\n" "update $prefix/symref $D $C" \|
148	test_must_fail git update-ref --stdin 2>output.err &&
149	test_cmp expected output.err
150	'
151
152	test_expect_success 'broken reference blocks indirect create' '
153	prefix=refs/broken-indirect-create &&
154	git symbolic-ref $prefix/symref $prefix/foo &&
155	echo "gobbledigook" >.git/$prefix/foo &&
156	test_when_finished "rm -f .git/$prefix/foo" &&
157	cat >expected <<-EOF &&
158	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
159	EOF
160	printf "%s\n" "update $prefix/symref $C" \|
161	test_must_fail git update-ref --stdin 2>output.err &&
162	test_cmp expected output.err &&
163	cat >expected <<-EOF &&
164	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
165	EOF
166	printf "%s\n" "update $prefix/symref $D $C" \|
167	test_must_fail git update-ref --stdin 2>output.err &&
168	test_cmp expected output.err
169	'
170
171	test_expect_success 'no bogus intermediate values during delete' '
172	prefix=refs/slow-transaction &&
173	# Set up a reference with differing loose and packed versions:
174	git update-ref $prefix/foo $C &&
175	git pack-refs --all &&
176	git update-ref $prefix/foo $D &&
177	# Now try to update the reference, but hold the `packed-refs` lock
178	# for a while to see what happens while the process is blocked:
179	: >.git/packed-refs.lock &&
180	test_when_finished "rm -f .git/packed-refs.lock" &&
181	{
182	# Note: the following command is intentionally run in the
183	# background. We increase the timeout so that `update-ref`
184	# attempts to acquire the `packed-refs` lock for much longer
185	# than it takes for us to do the check then delete it:
186	git -c core.packedrefstimeout=30000 update-ref -d $prefix/foo &
187	} &&
188	pid2=$! &&
189	# Give update-ref plenty of time to get to the point where it tries
190	# to lock packed-refs:
191	sleep 1 &&
192	# Make sure that update-ref did not complete despite the lock:
193	kill -0 $pid2 &&
194	# Verify that the reference still has its old value:
195	sha1=$(git rev-parse --verify --quiet $prefix/foo \|\| echo undefined) &&
196	case "$sha1" in
197	$D)
198	# This is what we hope for; it means that nothing
199	# user-visible has changed yet.
200	: ;;
201	undefined)
202	# This is not correct; it means the deletion has happened
203	# already even though update-ref should not have been
204	# able to acquire the lock yet.
205	echo "$prefix/foo deleted prematurely" &&
206	break
207	;;
208	$C)
209	# This value should never be seen. Probably the loose
210	# reference has been deleted but the packed reference
211	# is still there:
212	echo "$prefix/foo incorrectly observed to be C" &&
213	break
214	;;
215	*)
216	# WTF?
217	echo "unexpected value observed for $prefix/foo: $sha1" &&
218	break
219	;;
220	esac >out &&
221	rm -f .git/packed-refs.lock &&
222	wait $pid2 &&
223	test_must_be_empty out &&
224	test_must_fail git rev-parse --verify --quiet $prefix/foo
225	'
226
227	test_expect_success 'delete fails cleanly if packed-refs file is locked' '
228	prefix=refs/locked-packed-refs &&
229	# Set up a reference with differing loose and packed versions:
230	git update-ref $prefix/foo $C &&
231	git pack-refs --all &&
232	git update-ref $prefix/foo $D &&
233	git for-each-ref $prefix >unchanged &&
234	# Now try to delete it while the `packed-refs` lock is held:
235	: >.git/packed-refs.lock &&
236	test_when_finished "rm -f .git/packed-refs.lock" &&
237	test_must_fail git update-ref -d $prefix/foo >out 2>err &&
238	git for-each-ref $prefix >actual &&
239	test_grep "Unable to create $SQ.*packed-refs.lock$SQ: " err &&
240	test_cmp unchanged actual
241	'
242
243	test_expect_success 'delete fails cleanly if packed-refs.new write fails' '
244	# Setup and expectations are similar to the test above.
245	prefix=refs/failed-packed-refs &&
246	git update-ref $prefix/foo $C &&
247	git pack-refs --all &&
248	git update-ref $prefix/foo $D &&
249	git for-each-ref $prefix >unchanged &&
250	# This should not happen in practice, but it is an easy way to get a
251	# reliable error (we open with create_tempfile(), which uses O_EXCL).
252	: >.git/packed-refs.new &&
253	test_when_finished "rm -f .git/packed-refs.new" &&
254	test_must_fail git update-ref -d $prefix/foo &&
255	git for-each-ref $prefix >actual &&
256	test_cmp unchanged actual
257	'
258
e74d9f57 JC	259	RWT="test-tool ref-store worktree:wt"
	260	RMAIN="test-tool ref-store worktree:main"
	261
	262	test_expect_success 'setup worktree' '
	263	test_commit first &&
	264	git worktree add -b wt-main wt &&
	265	(
	266	cd wt &&
	267	test_commit second
	268	)
	269	'
	270
	271	# Some refs (refs/bisect/*, pseudorefs) are kept per worktree, so they should
	272	# only appear in the for-each-reflog output if it is called from the correct
	273	# worktree, which is exercised in this test. This test is poorly written for
	274	# mulitple reasons: 1) it creates invalidly formatted log entres. 2) it uses
	275	# direct FS access for creating the reflogs. 3) PSEUDO-WT and refs/bisect/random
	276	# do not create reflogs by default, so it is not testing a realistic scenario.
	277	test_expect_success 'for_each_reflog()' '
d037212d	278	echo $ZERO_OID >.git/logs/PSEUDO_MAIN_HEAD &&
e74d9f57	279	mkdir -p .git/logs/refs/bisect &&
d037212d	280	echo $ZERO_OID >.git/logs/refs/bisect/random &&
e74d9f57	281
d037212d	282	echo $ZERO_OID >.git/worktrees/wt/logs/PSEUDO_WT_HEAD &&
e74d9f57	283	mkdir -p .git/worktrees/wt/logs/refs/bisect &&
d037212d	284	echo $ZERO_OID >.git/worktrees/wt/logs/refs/bisect/wt-random &&
e74d9f57	285
31f89839	286	$RWT for-each-reflog >actual &&
e74d9f57	287	cat >expected <<-\EOF &&
31f89839	288	HEAD
d037212d	289	PSEUDO_WT_HEAD
31f89839 PS	290	refs/bisect/wt-random
	291	refs/heads/main
	292	refs/heads/wt-main
e74d9f57 JC	293	EOF
	294	test_cmp expected actual &&
	295
31f89839	296	$RMAIN for-each-reflog >actual &&
e74d9f57	297	cat >expected <<-\EOF &&
31f89839	298	HEAD
d037212d	299	PSEUDO_MAIN_HEAD
31f89839 PS	300	refs/bisect/random
	301	refs/heads/main
	302	refs/heads/wt-main
e74d9f57 JC	303	EOF
	304	test_cmp expected actual
	305	'
	306
c02ce758 JC	307	# Triggering the bug detected by this test requires a newline to fall
	308	# exactly BUFSIZ-1 bytes from the end of the file. We don't know
	309	# what that value is, since it's platform dependent. However, if
	310	# we choose some value N, we also catch any D which divides N evenly
	311	# (since we will read backwards in chunks of D). So we choose 8K,
	312	# which catches glibc (with an 8K BUFSIZ) and *BSD (1K).
	313	#
	314	# Each line is 114 characters, so we need 75 to still have a few before the
	315	# last 8K. The 89-character padding on the final entry lines up our
	316	# newline exactly.
	317	test_expect_success SHA1 'parsing reverse reflogs at BUFSIZ boundaries' '
	318	git checkout -b reflogskip &&
	319	zf=$(test_oid zero_2) &&
	320	ident="abc <xyz> 0000000001 +0000" &&
	321	for i in $(test_seq 1 75); do
	322	printf "$zf%02d $zf%02d %s\t" $i $(($i+1)) "$ident" &&
	323	if test $i = 75; then
	324	for j in $(test_seq 1 89); do
	325	printf X \|\| return 1
	326	done
	327	else
	328	printf X
	329	fi &&
	330	printf "\n" \|\| return 1
	331	done >.git/logs/refs/heads/reflogskip &&
	332	git rev-parse reflogskip@{73} >actual &&
	333	echo ${zf}03 >expect &&
	334	test_cmp expect actual
	335	'
	336
	337	# This test takes a lock on an individual ref; this is not supported in
	338	# reftable.
	339	test_expect_success 'reflog expire operates on symref not referrent' '
	340	git branch --create-reflog the_symref &&
	341	git branch --create-reflog referrent &&
	342	git update-ref referrent HEAD &&
	343	git symbolic-ref refs/heads/the_symref refs/heads/referrent &&
	344	test_when_finished "rm -f .git/refs/heads/referrent.lock" &&
	345	touch .git/refs/heads/referrent.lock &&
	346	git reflog expire --expire=all the_symref
	347	'
	348
	349	test_expect_success 'empty reflog' '
	350	test_when_finished "rm -rf empty" &&
	351	git init empty &&
	352	test_commit -C empty A &&
	353	>empty/.git/logs/refs/heads/foo &&
	354	git -C empty reflog expire --all 2>err &&
	355	test_must_be_empty err
	356	'
	357
dfc9486c JC	358	test_expect_success SYMLINKS 'ref resolution not confused by broken symlinks' '
	359	ln -s does-not-exist .git/refs/heads/broken &&
	360	test_must_fail git rev-parse --verify broken
	361	'
	362
1030d140 JC	363	test_expect_success 'log diagnoses bogus HEAD hash' '
	364	git init empty &&
	365	test_when_finished "rm -rf empty" &&
	366	echo 1234abcd >empty/.git/refs/heads/main &&
	367	test_must_fail git -C empty log 2>stderr &&
	368	test_grep broken stderr
	369	'
	370
	371	test_expect_success 'log diagnoses bogus HEAD symref' '
	372	git init empty &&
	373	test-tool -C empty ref-store main create-symref HEAD refs/heads/invalid.lock &&
	374	test_must_fail git -C empty log 2>stderr &&
	375	test_grep broken stderr &&
	376	test_must_fail git -C empty log --default totally-bogus 2>stderr &&
	377	test_grep broken stderr
	378	'
	379
161d9816 PS	380	test_expect_success 'empty directory removal' '
	381	git branch d1/d2/r1 HEAD &&
	382	git branch d1/r2 HEAD &&
	383	test_path_is_file .git/refs/heads/d1/d2/r1 &&
	384	test_path_is_file .git/logs/refs/heads/d1/d2/r1 &&
	385	git branch -d d1/d2/r1 &&
	386	test_must_fail git show-ref --verify -q refs/heads/d1/d2 &&
	387	test_must_fail git show-ref --verify -q logs/refs/heads/d1/d2 &&
	388	test_path_is_file .git/refs/heads/d1/r2 &&
	389	test_path_is_file .git/logs/refs/heads/d1/r2
	390	'
	391
	392	test_expect_success 'symref empty directory removal' '
	393	git branch e1/e2/r1 HEAD &&
	394	git branch e1/r2 HEAD &&
	395	git checkout e1/e2/r1 &&
	396	test_when_finished "git checkout main" &&
	397	test_path_is_file .git/refs/heads/e1/e2/r1 &&
	398	test_path_is_file .git/logs/refs/heads/e1/e2/r1 &&
	399	git update-ref -d HEAD &&
	400	test_must_fail git show-ref --verify -q refs/heads/e1/e2 &&
	401	test_must_fail git show-ref --verify -q logs/refs/heads/e1/e2 &&
	402	test_path_is_file .git/refs/heads/e1/r2 &&
	403	test_path_is_file .git/logs/refs/heads/e1/r2 &&
	404	test_path_is_file .git/logs/HEAD
	405	'
	406
	407	test_expect_success 'directory not created deleting packed ref' '
	408	git branch d1/d2/r1 HEAD &&
	409	git pack-refs --all &&
	410	test_path_is_missing .git/refs/heads/d1/d2 &&
	411	git update-ref -d refs/heads/d1/d2/r1 &&
	412	test_path_is_missing .git/refs/heads/d1/d2 &&
	413	test_path_is_missing .git/refs/heads/d1
	414	'
	415
	416	test_expect_success SYMLINKS 'git branch -m u v should fail when the reflog for u is a symlink' '
	417	git branch --create-reflog u &&
	418	mv .git/logs/refs/heads/u real-u &&
	419	ln -s real-u .git/logs/refs/heads/u &&
	420	test_must_fail git branch -m u v
	421	'
	422
	423	test_expect_success SYMLINKS 'git branch -m with symlinked .git/refs' '
	424	test_when_finished "rm -rf subdir" &&
	425	git init --bare subdir &&
	426
ce09c692	427	rm -rf subdir/refs subdir/objects subdir/packed-refs &&
161d9816 PS	428	ln -s ../.git/refs subdir/refs &&
	429	ln -s ../.git/objects subdir/objects &&
	430	ln -s ../.git/packed-refs subdir/packed-refs &&
	431
	432	git -C subdir rev-parse --absolute-git-dir >subdir.dir &&
	433	git rev-parse --absolute-git-dir >our.dir &&
	434	! test_cmp subdir.dir our.dir &&
	435
	436	git -C subdir log &&
	437	git -C subdir branch rename-src &&
	438	git rev-parse rename-src >expect &&
	439	git -C subdir branch -m rename-src rename-dest &&
	440	git rev-parse rename-dest >actual &&
	441	test_cmp expect actual &&
	442	git branch -D rename-dest
	443	'
	444
	445	test_expect_success MINGW,SYMLINKS_WINDOWS 'rebase when .git/logs is a symlink' '
	446	git checkout main &&
	447	mv .git/logs actual_logs &&
	448	cmd //c "mklink /D .git\logs ..\actual_logs" &&
	449	git rebase -f HEAD^ &&
	450	test -L .git/logs &&
	451	rm .git/logs &&
	452	mv actual_logs .git/logs
	453	'
	454
	455	test_expect_success POSIXPERM 'git reflog expire honors core.sharedRepository' '
	456	umask 077 &&
	457	git config core.sharedRepository group &&
	458	git reflog expire --all &&
	459	actual="$(ls -l .git/logs/refs/heads/main)" &&
	460	case "$actual" in
	461	-rw-rw-*)
	462	: happy
	463	;;
	464	*)
	465	echo Ooops, .git/logs/refs/heads/main is not 066x [$actual]
	466	false
	467	;;
	468	esac
	469	'
	470
102d7154	471	test_done