| #!/bin/sh | 
 |  | 
 | test_description='Test git update-ref error handling' | 
 | . ./test-lib.sh | 
 |  | 
 | # Create some references, perhaps run pack-refs --all, then try to | 
 | # create some more references. Ensure that the second creation fails | 
 | # with the correct error message. | 
 | # Usage: test_update_rejected <before> <pack> <create> <error> | 
 | #   <before> is a ws-separated list of refs to create before the test | 
 | #   <pack> (true or false) tells whether to pack the refs before the test | 
 | #   <create> is a list of variables to attempt creating | 
 | #   <error> is a string to look for in the stderr of update-ref. | 
 | # All references are created in the namespace specified by the current | 
 | # value of $prefix. | 
 | test_update_rejected () { | 
 | 	before="$1" && | 
 | 	pack="$2" && | 
 | 	create="$3" && | 
 | 	error="$4" && | 
 | 	printf "create $prefix/%s $C\n" $before | | 
 | 	git update-ref --stdin && | 
 | 	git for-each-ref $prefix >unchanged && | 
 | 	if $pack | 
 | 	then | 
 | 		git pack-refs --all | 
 | 	fi && | 
 | 	printf "create $prefix/%s $C\n" $create >input && | 
 | 	test_must_fail git update-ref --stdin <input 2>output.err && | 
 | 	grep -F "$error" output.err && | 
 | 	git for-each-ref $prefix >actual && | 
 | 	test_cmp unchanged actual | 
 | } | 
 |  | 
 | Q="'" | 
 |  | 
 | # Test adding and deleting D/F-conflicting references in a single | 
 | # transaction. | 
 | df_test() { | 
 | 	prefix="$1" | 
 | 	pack=: symadd=false symdel=false add_del=false addref= delref= | 
 | 	shift | 
 | 	while test $# -gt 0 | 
 | 	do | 
 | 		case "$1" in | 
 | 		--pack) | 
 | 			pack="git pack-refs --all" | 
 | 			shift | 
 | 			;; | 
 | 		--sym-add) | 
 | 			# Perform the add via a symbolic reference | 
 | 			symadd=true | 
 | 			shift | 
 | 			;; | 
 | 		--sym-del) | 
 | 			# Perform the del via a symbolic reference | 
 | 			symdel=true | 
 | 			shift | 
 | 			;; | 
 | 		--del-add) | 
 | 			# Delete first reference then add second | 
 | 			add_del=false | 
 | 			delref="$prefix/r/$2" | 
 | 			addref="$prefix/r/$3" | 
 | 			shift 3 | 
 | 			;; | 
 | 		--add-del) | 
 | 			# Add first reference then delete second | 
 | 			add_del=true | 
 | 			addref="$prefix/r/$2" | 
 | 			delref="$prefix/r/$3" | 
 | 			shift 3 | 
 | 			;; | 
 | 		*) | 
 | 			echo 1>&2 "Extra args to df_test: $*" | 
 | 			return 1 | 
 | 			;; | 
 | 		esac | 
 | 	done | 
 | 	git update-ref "$delref" $C && | 
 | 	if $symadd | 
 | 	then | 
 | 		addname="$prefix/s/symadd" && | 
 | 		git symbolic-ref "$addname" "$addref" | 
 | 	else | 
 | 		addname="$addref" | 
 | 	fi && | 
 | 	if $symdel | 
 | 	then | 
 | 		delname="$prefix/s/symdel" && | 
 | 		git symbolic-ref "$delname" "$delref" | 
 | 	else | 
 | 		delname="$delref" | 
 | 	fi && | 
 | 	cat >expected-err <<-EOF && | 
 | 	fatal: cannot lock ref $Q$addname$Q: $Q$delref$Q exists; cannot create $Q$addref$Q | 
 | 	EOF | 
 | 	$pack && | 
 | 	if $add_del | 
 | 	then | 
 | 		printf "%s\n" "create $addname $D" "delete $delname" | 
 | 	else | 
 | 		printf "%s\n" "delete $delname" "create $addname $D" | 
 | 	fi >commands && | 
 | 	test_must_fail git update-ref --stdin <commands 2>output.err && | 
 | 	test_cmp expected-err output.err && | 
 | 	printf "%s\n" "$C $delref" >expected-refs && | 
 | 	git for-each-ref --format="%(objectname) %(refname)" $prefix/r >actual-refs && | 
 | 	test_cmp expected-refs actual-refs | 
 | } | 
 |  | 
 | test_expect_success 'setup' ' | 
 |  | 
 | 	git commit --allow-empty -m Initial && | 
 | 	C=$(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 'existing loose ref is a simple prefix of new' ' | 
 |  | 
 | 	prefix=refs/1l && | 
 | 	test_update_rejected "a c e" false "b c/x d" \ | 
 | 		"$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'existing packed ref is a simple prefix of new' ' | 
 |  | 
 | 	prefix=refs/1p && | 
 | 	test_update_rejected "a c e" true "b c/x d" \ | 
 | 		"$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'existing loose ref is a deeper prefix of new' ' | 
 |  | 
 | 	prefix=refs/2l && | 
 | 	test_update_rejected "a c e" false "b c/x/y d" \ | 
 | 		"$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x/y$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'existing packed ref is a deeper prefix of new' ' | 
 |  | 
 | 	prefix=refs/2p && | 
 | 	test_update_rejected "a c e" true "b c/x/y d" \ | 
 | 		"$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x/y$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'new ref is a simple prefix of existing loose' ' | 
 |  | 
 | 	prefix=refs/3l && | 
 | 	test_update_rejected "a c/x e" false "b c d" \ | 
 | 		"$Q$prefix/c/x$Q exists; cannot create $Q$prefix/c$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'new ref is a simple prefix of existing packed' ' | 
 |  | 
 | 	prefix=refs/3p && | 
 | 	test_update_rejected "a c/x e" true "b c d" \ | 
 | 		"$Q$prefix/c/x$Q exists; cannot create $Q$prefix/c$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'new ref is a deeper prefix of existing loose' ' | 
 |  | 
 | 	prefix=refs/4l && | 
 | 	test_update_rejected "a c/x/y e" false "b c d" \ | 
 | 		"$Q$prefix/c/x/y$Q exists; cannot create $Q$prefix/c$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'new ref is a deeper prefix of existing packed' ' | 
 |  | 
 | 	prefix=refs/4p && | 
 | 	test_update_rejected "a c/x/y e" true "b c d" \ | 
 | 		"$Q$prefix/c/x/y$Q exists; cannot create $Q$prefix/c$Q" | 
 |  | 
 | ' | 
 |  | 
 | test_expect_success 'one new ref is a simple prefix of another' ' | 
 |  | 
 | 	prefix=refs/5 && | 
 | 	test_update_rejected "a e" false "b c c/x d" \ | 
 | 		"cannot process $Q$prefix/c$Q and $Q$prefix/c/x$Q at the same time" | 
 |  | 
 | ' | 
 |  | 
 | 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 'D/F conflict prevents add long + delete short' ' | 
 | 	df_test refs/df-al-ds --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents add short + delete long' ' | 
 | 	df_test refs/df-as-dl --add-del foo foo/bar | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents delete long + add short' ' | 
 | 	df_test refs/df-dl-as --del-add foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents delete short + add long' ' | 
 | 	df_test refs/df-ds-al --del-add foo foo/bar | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents add long + delete short packed' ' | 
 | 	df_test refs/df-al-dsp --pack --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents add short + delete long packed' ' | 
 | 	df_test refs/df-as-dlp --pack --add-del foo foo/bar | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents delete long packed + add short' ' | 
 | 	df_test refs/df-dlp-as --pack --del-add foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents delete short packed + add long' ' | 
 | 	df_test refs/df-dsp-al --pack --del-add foo foo/bar | 
 | ' | 
 |  | 
 | # Try some combinations involving symbolic refs... | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect add long + delete short' ' | 
 | 	df_test refs/df-ial-ds --sym-add --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect add long + indirect delete short' ' | 
 | 	df_test refs/df-ial-ids --sym-add --sym-del --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect add short + indirect delete long' ' | 
 | 	df_test refs/df-ias-idl --sym-add --sym-del --add-del foo foo/bar | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect delete long + indirect add short' ' | 
 | 	df_test refs/df-idl-ias --sym-add --sym-del --del-add foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect add long + delete short packed' ' | 
 | 	df_test refs/df-ial-dsp --sym-add --pack --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect add long + indirect delete short packed' ' | 
 | 	df_test refs/df-ial-idsp --sym-add --sym-del --pack --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents add long + indirect delete short packed' ' | 
 | 	df_test refs/df-al-idsp --sym-del --pack --add-del foo/bar foo | 
 | ' | 
 |  | 
 | test_expect_success 'D/F conflict prevents indirect delete long packed + indirect add short' ' | 
 | 	df_test refs/df-idlp-ias --sym-add --sym-del --pack --del-add foo/bar foo | 
 | ' | 
 |  | 
 | # Test various errors when reading the old values of references... | 
 |  | 
 | test_expect_success 'missing old value blocks update' ' | 
 | 	prefix=refs/missing-update && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q | 
 | 	EOF | 
 | 	printf "%s\n" "update $prefix/foo $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks update' ' | 
 | 	prefix=refs/incorrect-update && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/foo$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "update $prefix/foo $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'existing old value blocks create' ' | 
 | 	prefix=refs/existing-create && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/foo$Q: reference already exists | 
 | 	EOF | 
 | 	printf "%s\n" "create $prefix/foo $E" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks delete' ' | 
 | 	prefix=refs/incorrect-delete && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/foo$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "delete $prefix/foo $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'missing old value blocks indirect update' ' | 
 | 	prefix=refs/missing-indirect-update && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q | 
 | 	EOF | 
 | 	printf "%s\n" "update $prefix/symref $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks indirect update' ' | 
 | 	prefix=refs/incorrect-indirect-update && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "update $prefix/symref $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'existing old value blocks indirect create' ' | 
 | 	prefix=refs/existing-indirect-create && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: reference already exists | 
 | 	EOF | 
 | 	printf "%s\n" "create $prefix/symref $E" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks indirect delete' ' | 
 | 	prefix=refs/incorrect-indirect-delete && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "delete $prefix/symref $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'missing old value blocks indirect no-deref update' ' | 
 | 	prefix=refs/missing-noderef-update && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: reference is missing but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "option no-deref" "update $prefix/symref $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks indirect no-deref update' ' | 
 | 	prefix=refs/incorrect-noderef-update && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "option no-deref" "update $prefix/symref $E $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'existing old value blocks indirect no-deref create' ' | 
 | 	prefix=refs/existing-noderef-create && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: reference already exists | 
 | 	EOF | 
 | 	printf "%s\n" "option no-deref" "create $prefix/symref $E" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'incorrect old value blocks indirect no-deref delete' ' | 
 | 	prefix=refs/incorrect-noderef-delete && | 
 | 	git symbolic-ref $prefix/symref $prefix/foo && | 
 | 	git update-ref $prefix/foo $C && | 
 | 	cat >expected <<-EOF && | 
 | 	fatal: cannot lock ref $Q$prefix/symref$Q: is at $C but expected $D | 
 | 	EOF | 
 | 	printf "%s\n" "option no-deref" "delete $prefix/symref $D" | | 
 | 	test_must_fail git update-ref --stdin 2>output.err && | 
 | 	test_cmp expected output.err | 
 | ' | 
 |  | 
 | test_expect_success 'non-empty directory blocks create' ' | 
 | 	prefix=refs/ne-create && | 
 | 	mkdir -p .git/$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 $Q$prefix/foo$Q: there is a non-empty directory $Q.git/$prefix/foo$Q blocking reference $Q$prefix/foo$Q | 
 | 	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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q | 
 | 	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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/foo$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/symref$Q: there is a non-empty directory $Q.git/$prefix/foo$Q blocking reference $Q$prefix/foo$Q | 
 | 	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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q | 
 | 	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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q: 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 $Q$prefix/symref$Q: unable to resolve reference $Q$prefix/foo$Q: 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 && | 
 | 	git for-each-ref $prefix >unchanged && | 
 | 	# 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 longer than | 
 | 		# it takes for us to do the check then delete it: | 
 | 		git -c core.packedrefstimeout=3000 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_i18ngrep "Unable to create $Q.*packed-refs.lock$Q: File exists" err && | 
 | 	test_cmp unchanged actual | 
 | ' | 
 |  | 
 | test_done |