[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

TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh

if ! test_have_prereq REFFILES
then
	skip_all='skipping reffiles specific tests'
	test_done
fi

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

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

	$RWT for-each-reflog | cut -d" " -f 2- | sort >actual &&
	cat >expected <<-\EOF &&
	HEAD 0x1
	PSEUDO-WT 0x0
	refs/bisect/wt-random 0x0
	refs/heads/main 0x0
	refs/heads/wt-main 0x0
	EOF
	test_cmp expected actual &&

	$RMAIN for-each-reflog | cut -d" " -f 2- | sort >actual &&
	cat >expected <<-\EOF &&
	HEAD 0x1
	PSEUDO-MAIN 0x0
	refs/bisect/random 0x0
	refs/heads/main 0x0
	refs/heads/wt-main 0x0
	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_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
	7
	8	TEST_PASSES_SANITIZE_LEAK=true
	9	. ./test-lib.sh
	10
	11	if ! test_have_prereq REFFILES
	12	then
	13	skip_all='skipping reffiles specific tests'
	14	test_done
	15	fi
	16
	17	test_expect_success 'setup' '
	18	git commit --allow-empty -m Initial &&
	19	C=$(git rev-parse HEAD) &&
	20	git commit --allow-empty -m Second &&
	21	D=$(git rev-parse HEAD) &&
	22	git commit --allow-empty -m Third &&
	23	E=$(git rev-parse HEAD)
	24	'
	25
	26	test_expect_success 'empty directory should not fool rev-parse' '
	27	prefix=refs/e-rev-parse &&
	28	git update-ref $prefix/foo $C &&
	29	git pack-refs --all &&
	30	mkdir -p .git/$prefix/foo/bar/baz &&
	31	echo "$C" >expected &&
	32	git rev-parse $prefix/foo >actual &&
	33	test_cmp expected actual
	34	'
	35
	36	test_expect_success 'empty directory should not fool for-each-ref' '
	37	prefix=refs/e-for-each-ref &&
	38	git update-ref $prefix/foo $C &&
	39	git for-each-ref $prefix >expected &&
	40	git pack-refs --all &&
	41	mkdir -p .git/$prefix/foo/bar/baz &&
	42	git for-each-ref $prefix >actual &&
	43	test_cmp expected actual
	44	'
	45
	46	test_expect_success 'empty directory should not fool create' '
	47	prefix=refs/e-create &&
	48	mkdir -p .git/$prefix/foo/bar/baz &&
	49	printf "create %s $C\n" $prefix/foo \|
	50	git update-ref --stdin
	51	'
	52
	53	test_expect_success 'empty directory should not fool verify' '
	54	prefix=refs/e-verify &&
	55	git update-ref $prefix/foo $C &&
	56	git pack-refs --all &&
	57	mkdir -p .git/$prefix/foo/bar/baz &&
	58	printf "verify %s $C\n" $prefix/foo \|
	59	git update-ref --stdin
	60	'
	61
	62	test_expect_success 'empty directory should not fool 1-arg update' '
	63	prefix=refs/e-update-1 &&
	64	git update-ref $prefix/foo $C &&
65	git pack-refs --all &&
66	mkdir -p .git/$prefix/foo/bar/baz &&
67	printf "update %s $D\n" $prefix/foo \|
68	git update-ref --stdin
69	'
70
71	test_expect_success 'empty directory should not fool 2-arg update' '
72	prefix=refs/e-update-2 &&
73	git update-ref $prefix/foo $C &&
74	git pack-refs --all &&
75	mkdir -p .git/$prefix/foo/bar/baz &&
76	printf "update %s $D $C\n" $prefix/foo \|
77	git update-ref --stdin
78	'
79
80	test_expect_success 'empty directory should not fool 0-arg delete' '
81	prefix=refs/e-delete-0 &&
82	git update-ref $prefix/foo $C &&
83	git pack-refs --all &&
84	mkdir -p .git/$prefix/foo/bar/baz &&
85	printf "delete %s\n" $prefix/foo \|
86	git update-ref --stdin
87	'
88
89	test_expect_success 'empty directory should not fool 1-arg delete' '
90	prefix=refs/e-delete-1 &&
91	git update-ref $prefix/foo $C &&
92	git pack-refs --all &&
93	mkdir -p .git/$prefix/foo/bar/baz &&
94	printf "delete %s $C\n" $prefix/foo \|
95	git update-ref --stdin
96	'
97
98	test_expect_success 'non-empty directory blocks create' '
99	prefix=refs/ne-create &&
100	mkdir -p .git/$prefix/foo/bar &&
101	: >.git/$prefix/foo/bar/baz.lock &&
102	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
103	cat >expected <<-EOF &&
104	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
105	EOF
106	printf "%s\n" "update $prefix/foo $C" \|
107	test_must_fail git update-ref --stdin 2>output.err &&
108	test_cmp expected output.err &&
109	cat >expected <<-EOF &&
110	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ
111	EOF
112	printf "%s\n" "update $prefix/foo $D $C" \|
113	test_must_fail git update-ref --stdin 2>output.err &&
114	test_cmp expected output.err
115	'
116
117	test_expect_success 'broken reference blocks create' '
118	prefix=refs/broken-create &&
119	mkdir -p .git/$prefix &&
120	echo "gobbledigook" >.git/$prefix/foo &&
121	test_when_finished "rm -f .git/$prefix/foo" &&
122	cat >expected <<-EOF &&
123	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
124	EOF
125	printf "%s\n" "update $prefix/foo $C" \|
126	test_must_fail git update-ref --stdin 2>output.err &&
127	test_cmp expected output.err &&
128	cat >expected <<-EOF &&
129	fatal: cannot lock ref $SQ$prefix/foo$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
130	EOF
131	printf "%s\n" "update $prefix/foo $D $C" \|
132	test_must_fail git update-ref --stdin 2>output.err &&
133	test_cmp expected output.err
134	'
135
136	test_expect_success 'non-empty directory blocks indirect create' '
137	prefix=refs/ne-indirect-create &&
138	git symbolic-ref $prefix/symref $prefix/foo &&
139	mkdir -p .git/$prefix/foo/bar &&
140	: >.git/$prefix/foo/bar/baz.lock &&
141	test_when_finished "rm -f .git/$prefix/foo/bar/baz.lock" &&
142	cat >expected <<-EOF &&
143	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
144	EOF
145	printf "%s\n" "update $prefix/symref $C" \|
146	test_must_fail git update-ref --stdin 2>output.err &&
147	test_cmp expected output.err &&
148	cat >expected <<-EOF &&
149	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ
150	EOF
151	printf "%s\n" "update $prefix/symref $D $C" \|
152	test_must_fail git update-ref --stdin 2>output.err &&
153	test_cmp expected output.err
154	'
155
156	test_expect_success 'broken reference blocks indirect create' '
157	prefix=refs/broken-indirect-create &&
158	git symbolic-ref $prefix/symref $prefix/foo &&
159	echo "gobbledigook" >.git/$prefix/foo &&
160	test_when_finished "rm -f .git/$prefix/foo" &&
161	cat >expected <<-EOF &&
162	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
163	EOF
164	printf "%s\n" "update $prefix/symref $C" \|
165	test_must_fail git update-ref --stdin 2>output.err &&
166	test_cmp expected output.err &&
167	cat >expected <<-EOF &&
168	fatal: cannot lock ref $SQ$prefix/symref$SQ: unable to resolve reference $SQ$prefix/foo$SQ: reference broken
169	EOF
170	printf "%s\n" "update $prefix/symref $D $C" \|
171	test_must_fail git update-ref --stdin 2>output.err &&
172	test_cmp expected output.err
173	'
174
175	test_expect_success 'no bogus intermediate values during delete' '
176	prefix=refs/slow-transaction &&
177	# Set up a reference with differing loose and packed versions:
178	git update-ref $prefix/foo $C &&
179	git pack-refs --all &&
180	git update-ref $prefix/foo $D &&
181	# Now try to update the reference, but hold the `packed-refs` lock
182	# for a while to see what happens while the process is blocked:
183	: >.git/packed-refs.lock &&
184	test_when_finished "rm -f .git/packed-refs.lock" &&
185	{
186	# Note: the following command is intentionally run in the
187	# background. We increase the timeout so that `update-ref`
188	# attempts to acquire the `packed-refs` lock for much longer
189	# than it takes for us to do the check then delete it:
190	git -c core.packedrefstimeout=30000 update-ref -d $prefix/foo &
191	} &&
192	pid2=$! &&
193	# Give update-ref plenty of time to get to the point where it tries
194	# to lock packed-refs:
195	sleep 1 &&
196	# Make sure that update-ref did not complete despite the lock:
197	kill -0 $pid2 &&
198	# Verify that the reference still has its old value:
199	sha1=$(git rev-parse --verify --quiet $prefix/foo \|\| echo undefined) &&
200	case "$sha1" in
201	$D)
202	# This is what we hope for; it means that nothing
203	# user-visible has changed yet.
204	: ;;
205	undefined)
206	# This is not correct; it means the deletion has happened
207	# already even though update-ref should not have been
208	# able to acquire the lock yet.
209	echo "$prefix/foo deleted prematurely" &&
210	break
211	;;
212	$C)
213	# This value should never be seen. Probably the loose
214	# reference has been deleted but the packed reference
215	# is still there:
216	echo "$prefix/foo incorrectly observed to be C" &&
217	break
218	;;
219	*)
220	# WTF?
221	echo "unexpected value observed for $prefix/foo: $sha1" &&
222	break
223	;;
224	esac >out &&
225	rm -f .git/packed-refs.lock &&
226	wait $pid2 &&
227	test_must_be_empty out &&
228	test_must_fail git rev-parse --verify --quiet $prefix/foo
229	'
230
231	test_expect_success 'delete fails cleanly if packed-refs file is locked' '
232	prefix=refs/locked-packed-refs &&
233	# Set up a reference with differing loose and packed versions:
234	git update-ref $prefix/foo $C &&
235	git pack-refs --all &&
236	git update-ref $prefix/foo $D &&
237	git for-each-ref $prefix >unchanged &&
238	# Now try to delete it while the `packed-refs` lock is held:
239	: >.git/packed-refs.lock &&
240	test_when_finished "rm -f .git/packed-refs.lock" &&
241	test_must_fail git update-ref -d $prefix/foo >out 2>err &&
242	git for-each-ref $prefix >actual &&
243	test_grep "Unable to create $SQ.*packed-refs.lock$SQ: " err &&
244	test_cmp unchanged actual
245	'
246
247	test_expect_success 'delete fails cleanly if packed-refs.new write fails' '
248	# Setup and expectations are similar to the test above.
249	prefix=refs/failed-packed-refs &&
250	git update-ref $prefix/foo $C &&
251	git pack-refs --all &&
252	git update-ref $prefix/foo $D &&
253	git for-each-ref $prefix >unchanged &&
254	# This should not happen in practice, but it is an easy way to get a
255	# reliable error (we open with create_tempfile(), which uses O_EXCL).
256	: >.git/packed-refs.new &&
257	test_when_finished "rm -f .git/packed-refs.new" &&
258	test_must_fail git update-ref -d $prefix/foo &&
259	git for-each-ref $prefix >actual &&
260	test_cmp unchanged actual
261	'
262
e74d9f57 JC	263	RWT="test-tool ref-store worktree:wt"
	264	RMAIN="test-tool ref-store worktree:main"
	265
	266	test_expect_success 'setup worktree' '
	267	test_commit first &&
	268	git worktree add -b wt-main wt &&
	269	(
	270	cd wt &&
	271	test_commit second
	272	)
	273	'
	274
	275	# Some refs (refs/bisect/*, pseudorefs) are kept per worktree, so they should
	276	# only appear in the for-each-reflog output if it is called from the correct
	277	# worktree, which is exercised in this test. This test is poorly written for
	278	# mulitple reasons: 1) it creates invalidly formatted log entres. 2) it uses
	279	# direct FS access for creating the reflogs. 3) PSEUDO-WT and refs/bisect/random
	280	# do not create reflogs by default, so it is not testing a realistic scenario.
	281	test_expect_success 'for_each_reflog()' '
	282	echo $ZERO_OID > .git/logs/PSEUDO-MAIN &&
	283	mkdir -p .git/logs/refs/bisect &&
	284	echo $ZERO_OID > .git/logs/refs/bisect/random &&
	285
	286	echo $ZERO_OID > .git/worktrees/wt/logs/PSEUDO-WT &&
	287	mkdir -p .git/worktrees/wt/logs/refs/bisect &&
	288	echo $ZERO_OID > .git/worktrees/wt/logs/refs/bisect/wt-random &&
	289
	290	$RWT for-each-reflog \| cut -d" " -f 2- \| sort >actual &&
	291	cat >expected <<-\EOF &&
	292	HEAD 0x1
	293	PSEUDO-WT 0x0
	294	refs/bisect/wt-random 0x0
	295	refs/heads/main 0x0
	296	refs/heads/wt-main 0x0
	297	EOF
	298	test_cmp expected actual &&
	299
	300	$RMAIN for-each-reflog \| cut -d" " -f 2- \| sort >actual &&
	301	cat >expected <<-\EOF &&
	302	HEAD 0x1
	303	PSEUDO-MAIN 0x0
	304	refs/bisect/random 0x0
	305	refs/heads/main 0x0
	306	refs/heads/wt-main 0x0
	307	EOF
	308	test_cmp expected actual
	309	'
	310
c02ce758 JC	311	# Triggering the bug detected by this test requires a newline to fall
	312	# exactly BUFSIZ-1 bytes from the end of the file. We don't know
	313	# what that value is, since it's platform dependent. However, if
	314	# we choose some value N, we also catch any D which divides N evenly
	315	# (since we will read backwards in chunks of D). So we choose 8K,
	316	# which catches glibc (with an 8K BUFSIZ) and *BSD (1K).
	317	#
	318	# Each line is 114 characters, so we need 75 to still have a few before the
	319	# last 8K. The 89-character padding on the final entry lines up our
	320	# newline exactly.
	321	test_expect_success SHA1 'parsing reverse reflogs at BUFSIZ boundaries' '
	322	git checkout -b reflogskip &&
	323	zf=$(test_oid zero_2) &&
	324	ident="abc <xyz> 0000000001 +0000" &&
	325	for i in $(test_seq 1 75); do
	326	printf "$zf%02d $zf%02d %s\t" $i $(($i+1)) "$ident" &&
	327	if test $i = 75; then
	328	for j in $(test_seq 1 89); do
	329	printf X \|\| return 1
	330	done
	331	else
	332	printf X
	333	fi &&
	334	printf "\n" \|\| return 1
	335	done >.git/logs/refs/heads/reflogskip &&
	336	git rev-parse reflogskip@{73} >actual &&
	337	echo ${zf}03 >expect &&
	338	test_cmp expect actual
	339	'
	340
	341	# This test takes a lock on an individual ref; this is not supported in
	342	# reftable.
	343	test_expect_success 'reflog expire operates on symref not referrent' '
	344	git branch --create-reflog the_symref &&
	345	git branch --create-reflog referrent &&
	346	git update-ref referrent HEAD &&
	347	git symbolic-ref refs/heads/the_symref refs/heads/referrent &&
	348	test_when_finished "rm -f .git/refs/heads/referrent.lock" &&
	349	touch .git/refs/heads/referrent.lock &&
	350	git reflog expire --expire=all the_symref
	351	'
	352
	353	test_expect_success 'empty reflog' '
	354	test_when_finished "rm -rf empty" &&
	355	git init empty &&
	356	test_commit -C empty A &&
	357	>empty/.git/logs/refs/heads/foo &&
	358	git -C empty reflog expire --all 2>err &&
	359	test_must_be_empty err
	360	'
	361
dfc9486c JC	362	test_expect_success SYMLINKS 'ref resolution not confused by broken symlinks' '
	363	ln -s does-not-exist .git/refs/heads/broken &&
	364	test_must_fail git rev-parse --verify broken
	365	'
	366
1030d140 JC	367	test_expect_success 'log diagnoses bogus HEAD hash' '
	368	git init empty &&
	369	test_when_finished "rm -rf empty" &&
	370	echo 1234abcd >empty/.git/refs/heads/main &&
	371	test_must_fail git -C empty log 2>stderr &&
	372	test_grep broken stderr
	373	'
	374
	375	test_expect_success 'log diagnoses bogus HEAD symref' '
	376	git init empty &&
	377	test-tool -C empty ref-store main create-symref HEAD refs/heads/invalid.lock &&
	378	test_must_fail git -C empty log 2>stderr &&
	379	test_grep broken stderr &&
	380	test_must_fail git -C empty log --default totally-bogus 2>stderr &&
	381	test_grep broken stderr
	382	'
	383
102d7154	384	test_done