[thirdparty/git.git] / t / t5323-pack-redundant.sh

#!/bin/sh
#
# Copyright (c) 2018 Jiang Xin
#

test_description='Test git pack-redundant

In order to test git-pack-redundant, we will create a number of objects and
packs in the repository `master.git`. The relationship between packs (P1-P8)
and objects (T, A-R) is showed in the following chart. Objects of a pack will
be marked with letter x, while objects of redundant packs will be marked with
exclamation point, and redundant pack itself will be marked with asterisk.

	| T A B C D E F G H I J K L M N O P Q R
    ----+--------------------------------------
    P1  | x x x x x x x                       x
    P2* |     ! ! ! !   ! ! !
    P3  |             x     x x x x x
    P4* |                     ! ! ! !     !
    P5  |               x x           x x
    P6* |                             ! !   !
    P7  |                                 x x
    P8* |   !
    ----+--------------------------------------
    ALL | x x x x x x x x x x x x x x x x x x x

Another repository `shared.git` has unique objects (X-Z), while other objects
(marked with letter s) are shared through alt-odb (of `master.git`). The
relationship between packs and objects is as follows:

	| T A B C D E F G H I J K L M N O P Q R   X Y Z
    ----+----------------------------------------------
    Px1 |   s s s                                 x x x
    Px2 |         s s s                           x x x
'

. ./test-lib.sh

master_repo=master.git
shared_repo=shared.git

# Create commits in <repo> and assign each commit's oid to shell variables
# given in the arguments (A, B, and C). E.g.:
#
#     create_commits_in <repo> A B C
#
# NOTE: Avoid calling this function from a subshell since variable
# assignments will disappear when subshell exits.
create_commits_in () {
	repo="$1" &&
	if ! parent=$(git -C "$repo" rev-parse HEAD^{} 2>/dev/null)
	then
		parent=
	fi &&
	T=$(git -C "$repo" write-tree) &&
	shift &&
	while test $# -gt 0
	do
		name=$1 &&
		test_tick &&
		if test -z "$parent"
		then
			oid=$(echo $name | git -C "$repo" commit-tree $T)
		else
			oid=$(echo $name | git -C "$repo" commit-tree -p $parent $T)
		fi &&
		eval $name=$oid &&
		parent=$oid &&
		shift ||
		return 1
	done &&
	git -C "$repo" update-ref refs/heads/master $oid
}

# Create pack in <repo> and assign pack id to variable given in the 2nd argument
# (<name>). Commits in the pack will be read from stdin. E.g.:
#
#     create_pack_in <repo> <name> <<-EOF
#         ...
#         EOF
#
# NOTE: commits from stdin should be given using heredoc, not using pipe, and
# avoid calling this function from a subshell since variable assignments will
# disappear when subshell exits.
create_pack_in () {
	repo="$1" &&
	name="$2" &&
	pack=$(git -C "$repo/objects/pack" pack-objects -q pack) &&
	eval $name=$pack &&
	eval P$pack=$name:$pack
}

format_packfiles () {
	sed \
		-e "s#.*/pack-\(.*\)\.idx#\1#" \
		-e "s#.*/pack-\(.*\)\.pack#\1#" |
	sort -u |
	while read p
	do
		if test -z "$(eval echo \${P$p})"
		then
			echo $p
		else
			eval echo "\${P$p}"
		fi
	done |
	sort
}

test_expect_success 'setup master repo' '
	git init --bare "$master_repo" &&
	create_commits_in "$master_repo" A B C D E F G H I J K L M N O P Q R
'

#############################################################################
# Chart of packs and objects for this test case
#
#         | T A B C D E F G H I J K L M N O P Q R
#     ----+--------------------------------------
#     P1  | x x x x x x x                       x
#     P2  |     x x x x   x x x
#     P3  |             x     x x x x x
#     ----+--------------------------------------
#     ALL | x x x x x x x x x x x x x x         x
#
#############################################################################
test_expect_success 'master: no redundant for pack 1, 2, 3' '
	create_pack_in "$master_repo" P1 <<-EOF &&
		$T
		$A
		$B
		$C
		$D
		$E
		$F
		$R
		EOF
	create_pack_in "$master_repo" P2 <<-EOF &&
		$B
		$C
		$D
		$E
		$G
		$H
		$I
		EOF
	create_pack_in "$master_repo" P3 <<-EOF &&
		$F
		$I
		$J
		$K
		$L
		$M
		EOF
	(
		cd "$master_repo" &&
		git pack-redundant --all >out &&
		test_must_be_empty out
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#         | T A B C D E F G H I J K L M N O P Q R
#     ----+--------------------------------------
#     P1  | x x x x x x x                       x
#     P2  |     x x x x   x x x
#     P3* |             !     ! ! ! ! !
#     P4  |                     x x x x     x
#     P5  |               x x           x x
#     ----+--------------------------------------
#     ALL | x x x x x x x x x x x x x x x x x   x
#
#############################################################################
test_expect_success 'master: one of pack-2/pack-3 is redundant' '
	create_pack_in "$master_repo" P4 <<-EOF &&
		$J
		$K
		$L
		$M
		$P
		EOF
	create_pack_in "$master_repo" P5 <<-EOF &&
		$G
		$H
		$N
		$O
		EOF
	(
		cd "$master_repo" &&
		cat >expect <<-EOF &&
			P3:$P3
			EOF
		git pack-redundant --all >out &&
		format_packfiles <out >actual &&
		test_cmp expect actual
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#         | T A B C D E F G H I J K L M N O P Q R
#     ----+--------------------------------------
#     P1  | x x x x x x x                       x
#     P2* |     ! ! ! !   ! ! !
#     P3  |             x     x x x x x
#     P4* |                     ! ! ! !     !
#     P5  |               x x           x x
#     P6* |                             ! !   !
#     P7  |                                 x x
#     ----+--------------------------------------
#     ALL | x x x x x x x x x x x x x x x x x x x
#
#############################################################################
test_expect_success 'master: pack 2, 4, and 6 are redundant' '
	create_pack_in "$master_repo" P6 <<-EOF &&
		$N
		$O
		$Q
		EOF
	create_pack_in "$master_repo" P7 <<-EOF &&
		$P
		$Q
		EOF
	(
		cd "$master_repo" &&
		cat >expect <<-EOF &&
			P2:$P2
			P4:$P4
			P6:$P6
			EOF
		git pack-redundant --all >out &&
		format_packfiles <out >actual &&
		test_cmp expect actual
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#         | T A B C D E F G H I J K L M N O P Q R
#     ----+--------------------------------------
#     P1  | x x x x x x x                       x
#     P2* |     ! ! ! !   ! ! !
#     P3  |             x     x x x x x
#     P4* |                     ! ! ! !     !
#     P5  |               x x           x x
#     P6* |                             ! !   !
#     P7  |                                 x x
#     P8* |   !
#     ----+--------------------------------------
#     ALL | x x x x x x x x x x x x x x x x x x x
#
#############################################################################
test_expect_success 'master: pack-8 (subset of pack-1) is also redundant' '
	create_pack_in "$master_repo" P8 <<-EOF &&
		$A
		EOF
	(
		cd "$master_repo" &&
		cat >expect <<-EOF &&
			P2:$P2
			P4:$P4
			P6:$P6
			P8:$P8
			EOF
		git pack-redundant --all >out &&
		format_packfiles <out >actual &&
		test_cmp expect actual
	)
'

test_expect_success 'master: clean loose objects' '
	(
		cd "$master_repo" &&
		git prune-packed &&
		find objects -type f | sed -e "/objects\/pack\//d" >out &&
		test_must_be_empty out
	)
'

test_expect_success 'master: remove redundant packs and pass fsck' '
	(
		cd "$master_repo" &&
		git pack-redundant --all | xargs rm &&
		git fsck &&
		git pack-redundant --all >out &&
		test_must_be_empty out
	)
'

# The following test cases will execute inside `shared.git`, instead of
# inside `master.git`.
test_expect_success 'setup shared.git' '
	git clone --mirror "$master_repo" "$shared_repo" &&
	(
		cd "$shared_repo" &&
		printf "../../$master_repo/objects\n" >objects/info/alternates
	)
'

test_expect_success 'shared: all packs are redundant, but no output without --alt-odb' '
	(
		cd "$shared_repo" &&
		git pack-redundant --all >out &&
		test_must_be_empty out
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#     ================ master.git ===============
#         | T A B C D E F G H I J K L M N O P Q R  <----------+
#     ----+--------------------------------------             |
#     P1  | x x x x x x x                       x             |
#     P3  |             x     x x x x x                       |
#     P5  |               x x           x x                   |
#     P7  |                                 x x               |
#     ----+--------------------------------------             |
#     ALL | x x x x x x x x x x x x x x x x x x x             |
#                                                             |
#                                                             |
#     ================ shared.git ===============             |
#         | T A B C D E F G H I J K L M N O P Q R  <objects/info/alternates>
#     ----+--------------------------------------
#     P1* | s s s s s s s                       s
#     P3* |             s     s s s s s
#     P5* |               s s           s s
#     P7* |                                 s s
#     ----+--------------------------------------
#     ALL | x x x x x x x x x x x x x x x x x x x
#
#############################################################################
test_expect_success 'shared: show redundant packs in stderr for verbose mode' '
	(
		cd "$shared_repo" &&
		cat >expect <<-EOF &&
			P1:$P1
			P3:$P3
			P5:$P5
			P7:$P7
			EOF
		git pack-redundant --all --verbose >out 2>out.err &&
		test_must_be_empty out &&
		grep "pack$" out.err | format_packfiles >actual &&
		test_cmp expect actual
	)
'

test_expect_success 'shared: remove redundant packs, no packs left' '
	(
		cd "$shared_repo" &&
		cat >expect <<-EOF &&
			fatal: Zero packs found!
			EOF
		git pack-redundant --all --alt-odb | xargs rm &&
		git fsck &&
		test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
		test_cmp expect actual
	)
'

test_expect_success 'shared: create new objects and packs' '
	create_commits_in "$shared_repo" X Y Z &&
	create_pack_in "$shared_repo" Px1 <<-EOF &&
		$X
		$Y
		$Z
		$A
		$B
		$C
		EOF
	create_pack_in "$shared_repo" Px2 <<-EOF
		$X
		$Y
		$Z
		$D
		$E
		$F
		EOF
'

test_expect_success 'shared: no redundant without --alt-odb' '
	(
		cd "$shared_repo" &&
		git pack-redundant --all >out &&
		test_must_be_empty out
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#     ================ master.git ===============
#         | T A B C D E F G H I J K L M N O P Q R  <----------------+
#     ----+--------------------------------------                   |
#     P1  | x x x x x x x                       x                   |
#     P3  |             x     x x x x x                             |
#     P5  |               x x           x x                         |
#     P7  |                                 x x                     |
#     ----+--------------------------------------                   |
#     ALL | x x x x x x x x x x x x x x x x x x x                   |
#                                                                   |
#                                                                   |
#     ================ shared.git =======================           |
#         | T A B C D E F G H I J K L M N O P Q R   X Y Z <objects/info/alternates>
#     ----+----------------------------------------------
#     Px1 |   s s s                                 x x x
#     Px2*|         s s s                           ! ! !
#     ----+----------------------------------------------
#     ALL | s s s s s s s s s s s s s s s s s s s   x x x
#
#############################################################################
test_expect_success 'shared: one pack is redundant with --alt-odb' '
	(
		cd "$shared_repo" &&
		git pack-redundant --all --alt-odb >out &&
		format_packfiles <out >actual &&
		test_line_count = 1 actual
	)
'

#############################################################################
# Chart of packs and objects for this test case
#
#     ================ master.git ===============
#         | T A B C D E F G H I J K L M N O P Q R  <----------------+
#     ----+--------------------------------------                   |
#     P1  | x x x x x x x                       x                   |
#     P3  |             x     x x x x x                             |
#     P5  |               x x           x x                         |
#     P7  |                                 x x                     |
#     ----+--------------------------------------                   |
#     ALL | x x x x x x x x x x x x x x x x x x x                   |
#                                                                   |
#                                                                   |
#     ================ shared.git =======================           |
#         | T A B C D E F G H I J K L M N O P Q R   X Y Z <objects/info/alternates>
#     ----+----------------------------------------------
#     Px1*|   s s s                                 i i i
#     Px2*|         s s s                           i i i
#     ----+----------------------------------------------
#     ALL | s s s s s s s s s s s s s s s s s s s   i i i
#                                                  (ignored objects, marked with i)
#
#############################################################################
test_expect_success 'shared: ignore unique objects and all two packs are redundant' '
	(
		cd "$shared_repo" &&
		cat >expect <<-EOF &&
			Px1:$Px1
			Px2:$Px2
			EOF
		git pack-redundant --all --alt-odb >out <<-EOF &&
			$X
			$Y
			$Z
			EOF
		format_packfiles <out >actual &&
		test_cmp expect actual
	)
'

test_done
Commit	Line	Data
3173a94d JX	1	#!/bin/sh
	2	#
	3	# Copyright (c) 2018 Jiang Xin
	4	#
	5
	6	test_description='Test git pack-redundant
	7
	8	In order to test git-pack-redundant, we will create a number of objects and
	9	packs in the repository `master.git`. The relationship between packs (P1-P8)
	10	and objects (T, A-R) is showed in the following chart. Objects of a pack will
	11	be marked with letter x, while objects of redundant packs will be marked with
	12	exclamation point, and redundant pack itself will be marked with asterisk.
	13
	14	\| T A B C D E F G H I J K L M N O P Q R
	15	----+--------------------------------------
	16	P1 \| x x x x x x x x
	17	P2* \| ! ! ! ! ! ! !
	18	P3 \| x x x x x x
	19	P4* \| ! ! ! ! !
	20	P5 \| x x x x
	21	P6* \| ! ! !
	22	P7 \| x x
	23	P8* \| !
	24	----+--------------------------------------
	25	ALL \| x x x x x x x x x x x x x x x x x x x
	26
	27	Another repository `shared.git` has unique objects (X-Z), while other objects
	28	(marked with letter s) are shared through alt-odb (of `master.git`). The
	29	relationship between packs and objects is as follows:
	30
	31	\| T A B C D E F G H I J K L M N O P Q R X Y Z
	32	----+----------------------------------------------
	33	Px1 \| s s s x x x
	34	Px2 \| s s s x x x
	35	'
	36
	37	. ./test-lib.sh
	38
	39	master_repo=master.git
	40	shared_repo=shared.git
	41
	42	# Create commits in <repo> and assign each commit's oid to shell variables
	43	# given in the arguments (A, B, and C). E.g.:
	44	#
	45	# create_commits_in <repo> A B C
	46	#
	47	# NOTE: Avoid calling this function from a subshell since variable
	48	# assignments will disappear when subshell exits.
	49	create_commits_in () {
	50	repo="$1" &&
	51	if ! parent=$(git -C "$repo" rev-parse HEAD^{} 2>/dev/null)
	52	then
	53	parent=
	54	fi &&
	55	T=$(git -C "$repo" write-tree) &&
	56	shift &&
	57	while test $# -gt 0
	58	do
	59	name=$1 &&
	60	test_tick &&
	61	if test -z "$parent"
	62	then
	63	oid=$(echo $name \| git -C "$repo" commit-tree $T)
	64	else
65	oid=$(echo $name \| git -C "$repo" commit-tree -p $parent $T)
66	fi &&
67	eval $name=$oid &&
68	parent=$oid &&
69	shift \|\|
70	return 1
71	done &&
72	git -C "$repo" update-ref refs/heads/master $oid
73	}
74
75	# Create pack in <repo> and assign pack id to variable given in the 2nd argument
76	# (<name>). Commits in the pack will be read from stdin. E.g.:
77	#
78	# create_pack_in <repo> <name> <<-EOF
79	# ...
80	# EOF
81	#
82	# NOTE: commits from stdin should be given using heredoc, not using pipe, and
83	# avoid calling this function from a subshell since variable assignments will
84	# disappear when subshell exits.
85	create_pack_in () {
86	repo="$1" &&
87	name="$2" &&
88	pack=$(git -C "$repo/objects/pack" pack-objects -q pack) &&
89	eval $name=$pack &&
90	eval P$pack=$name:$pack
91	}
92
93	format_packfiles () {
94	sed \
95	-e "s#./pack-\(.\)\.idx#\1#" \
96	-e "s#./pack-\(.\)\.pack#\1#" \|
97	sort -u \|
98	while read p
99	do
100	if test -z "$(eval echo \${P$p})"
101	then
102	echo $p
103	else
104	eval echo "\${P$p}"
105	fi
106	done \|
107	sort
108	}
109
110	test_expect_success 'setup master repo' '
111	git init --bare "$master_repo" &&
112	create_commits_in "$master_repo" A B C D E F G H I J K L M N O P Q R
113	'
114
115	#############################################################################
116	# Chart of packs and objects for this test case
117	#
118	# \| T A B C D E F G H I J K L M N O P Q R
119	# ----+--------------------------------------
120	# P1 \| x x x x x x x x
121	# P2 \| x x x x x x x
122	# P3 \| x x x x x x
123	# ----+--------------------------------------
124	# ALL \| x x x x x x x x x x x x x x x
125	#
126	#############################################################################
127	test_expect_success 'master: no redundant for pack 1, 2, 3' '
128	create_pack_in "$master_repo" P1 <<-EOF &&
129	$T
130	$A
131	$B
132	$C
133	$D
134	$E
135	$F
136	$R
137	EOF
138	create_pack_in "$master_repo" P2 <<-EOF &&
139	$B
140	$C
141	$D
142	$E
143	$G
144	$H
145	$I
146	EOF
147	create_pack_in "$master_repo" P3 <<-EOF &&
148	$F
149	$I
150	$J
151	$K
152	$L
153	$M
154	EOF
155	(
156	cd "$master_repo" &&
157	git pack-redundant --all >out &&
158	test_must_be_empty out
159	)
160	'
161
162	#############################################################################
163	# Chart of packs and objects for this test case
164	#
165	# \| T A B C D E F G H I J K L M N O P Q R
166	# ----+--------------------------------------
167	# P1 \| x x x x x x x x
0e37abd2 JX	168	# P2 \| x x x x x x x
0e37abd2 JX	169	# P3* \| ! ! ! ! ! !
3173a94d JX	170	# P4 \| x x x x x
	171	# P5 \| x x x x
	172	# ----+--------------------------------------
	173	# ALL \| x x x x x x x x x x x x x x x x x x
	174	#
	175	#############################################################################
0e37abd2	176	test_expect_success 'master: one of pack-2/pack-3 is redundant' '
3173a94d JX	177	create_pack_in "$master_repo" P4 <<-EOF &&
	178	$J
	179	$K
	180	$L
	181	$M
	182	$P
	183	EOF
	184	create_pack_in "$master_repo" P5 <<-EOF &&
	185	$G
	186	$H
	187	$N
	188	$O
	189	EOF
	190	(
	191	cd "$master_repo" &&
	192	cat >expect <<-EOF &&
0e37abd2	193	P3:$P3
3173a94d JX	194	EOF
	195	git pack-redundant --all >out &&
	196	format_packfiles <out >actual &&
	197	test_cmp expect actual
	198	)
	199	'
	200
	201	#############################################################################
	202	# Chart of packs and objects for this test case
	203	#
	204	# \| T A B C D E F G H I J K L M N O P Q R
	205	# ----+--------------------------------------
	206	# P1 \| x x x x x x x x
	207	# P2* \| ! ! ! ! ! ! !
	208	# P3 \| x x x x x x
	209	# P4* \| ! ! ! ! !
	210	# P5 \| x x x x
	211	# P6* \| ! ! !
	212	# P7 \| x x
	213	# ----+--------------------------------------
	214	# ALL \| x x x x x x x x x x x x x x x x x x x
	215	#
	216	#############################################################################
0e37abd2	217	test_expect_success 'master: pack 2, 4, and 6 are redundant' '
3173a94d JX	218	create_pack_in "$master_repo" P6 <<-EOF &&
	219	$N
	220	$O
	221	$Q
	222	EOF
	223	create_pack_in "$master_repo" P7 <<-EOF &&
	224	$P
	225	$Q
	226	EOF
	227	(
	228	cd "$master_repo" &&
	229	cat >expect <<-EOF &&
	230	P2:$P2
	231	P4:$P4
	232	P6:$P6
	233	EOF
	234	git pack-redundant --all >out &&
	235	format_packfiles <out >actual &&
	236	test_cmp expect actual
	237	)
	238	'
	239
	240	#############################################################################
	241	# Chart of packs and objects for this test case
	242	#
	243	# \| T A B C D E F G H I J K L M N O P Q R
	244	# ----+--------------------------------------
	245	# P1 \| x x x x x x x x
	246	# P2* \| ! ! ! ! ! ! !
	247	# P3 \| x x x x x x
	248	# P4* \| ! ! ! ! !
	249	# P5 \| x x x x
	250	# P6* \| ! ! !
	251	# P7 \| x x
	252	# P8* \| !
	253	# ----+--------------------------------------
	254	# ALL \| x x x x x x x x x x x x x x x x x x x
	255	#
	256	#############################################################################
0e37abd2	257	test_expect_success 'master: pack-8 (subset of pack-1) is also redundant' '
3173a94d JX	258	create_pack_in "$master_repo" P8 <<-EOF &&
	259	$A
	260	EOF
	261	(
	262	cd "$master_repo" &&
	263	cat >expect <<-EOF &&
	264	P2:$P2
	265	P4:$P4
	266	P6:$P6
	267	P8:$P8
	268	EOF
	269	git pack-redundant --all >out &&
	270	format_packfiles <out >actual &&
	271	test_cmp expect actual
	272	)
	273	'
	274
	275	test_expect_success 'master: clean loose objects' '
	276	(
	277	cd "$master_repo" &&
	278	git prune-packed &&
	279	find objects -type f \| sed -e "/objects\/pack\//d" >out &&
	280	test_must_be_empty out
	281	)
	282	'
	283
0e37abd2	284	test_expect_success 'master: remove redundant packs and pass fsck' '
3173a94d JX	285	(
	286	cd "$master_repo" &&
	287	git pack-redundant --all \| xargs rm &&
	288	git fsck &&
	289	git pack-redundant --all >out &&
	290	test_must_be_empty out
	291	)
	292	'
	293
	294	# The following test cases will execute inside `shared.git`, instead of
	295	# inside `master.git`.
	296	test_expect_success 'setup shared.git' '
	297	git clone --mirror "$master_repo" "$shared_repo" &&
	298	(
	299	cd "$shared_repo" &&
	300	printf "../../$master_repo/objects\n" >objects/info/alternates
	301	)
	302	'
	303
0e37abd2	304	test_expect_success 'shared: all packs are redundant, but no output without --alt-odb' '
3173a94d JX	305	(
	306	cd "$shared_repo" &&
	307	git pack-redundant --all >out &&
	308	test_must_be_empty out
	309	)
	310	'
	311
	312	#############################################################################
	313	# Chart of packs and objects for this test case
	314	#
	315	# ================ master.git ===============
	316	# \| T A B C D E F G H I J K L M N O P Q R <----------+
	317	# ----+-------------------------------------- \|
	318	# P1 \| x x x x x x x x \|
	319	# P3 \| x x x x x x \|
	320	# P5 \| x x x x \|
	321	# P7 \| x x \|
	322	# ----+-------------------------------------- \|
	323	# ALL \| x x x x x x x x x x x x x x x x x x x \|
	324	# \|
	325	# \|
	326	# ================ shared.git =============== \|
	327	# \| T A B C D E F G H I J K L M N O P Q R <objects/info/alternates>
	328	# ----+--------------------------------------
	329	# P1* \| s s s s s s s s
	330	# P3* \| s s s s s s
	331	# P5* \| s s s s
	332	# P7* \| s s
	333	# ----+--------------------------------------
	334	# ALL \| x x x x x x x x x x x x x x x x x x x
	335	#
	336	#############################################################################
0e37abd2	337	test_expect_success 'shared: show redundant packs in stderr for verbose mode' '
3173a94d JX	338	(
	339	cd "$shared_repo" &&
	340	cat >expect <<-EOF &&
	341	P1:$P1
	342	P3:$P3
	343	P5:$P5
	344	P7:$P7
	345	EOF
	346	git pack-redundant --all --verbose >out 2>out.err &&
	347	test_must_be_empty out &&
	348	grep "pack$" out.err \| format_packfiles >actual &&
	349	test_cmp expect actual
	350	)
	351	'
	352
	353	test_expect_success 'shared: remove redundant packs, no packs left' '
	354	(
	355	cd "$shared_repo" &&
	356	cat >expect <<-EOF &&
	357	fatal: Zero packs found!
	358	EOF
	359	git pack-redundant --all --alt-odb \| xargs rm &&
	360	git fsck &&
	361	test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
	362	test_cmp expect actual
	363	)
	364	'
	365
	366	test_expect_success 'shared: create new objects and packs' '
	367	create_commits_in "$shared_repo" X Y Z &&
	368	create_pack_in "$shared_repo" Px1 <<-EOF &&
	369	$X
	370	$Y
	371	$Z
	372	$A
	373	$B
	374	$C
	375	EOF
	376	create_pack_in "$shared_repo" Px2 <<-EOF
	377	$X
	378	$Y
	379	$Z
	380	$D
	381	$E
	382	$F
	383	EOF
	384	'
	385
	386	test_expect_success 'shared: no redundant without --alt-odb' '
	387	(
	388	cd "$shared_repo" &&
	389	git pack-redundant --all >out &&
	390	test_must_be_empty out
	391	)
	392	'
	393
	394	#############################################################################
	395	# Chart of packs and objects for this test case
	396	#
	397	# ================ master.git ===============
	398	# \| T A B C D E F G H I J K L M N O P Q R <----------------+
	399	# ----+-------------------------------------- \|
	400	# P1 \| x x x x x x x x \|
	401	# P3 \| x x x x x x \|
402	# P5 \| x x x x \|
403	# P7 \| x x \|
404	# ----+-------------------------------------- \|
405	# ALL \| x x x x x x x x x x x x x x x x x x x \|
406	# \|
407	# \|
408	# ================ shared.git ======================= \|
409	# \| T A B C D E F G H I J K L M N O P Q R X Y Z <objects/info/alternates>
410	# ----+----------------------------------------------
411	# Px1 \| s s s x x x
412	# Px2*\| s s s ! ! !
413	# ----+----------------------------------------------
414	# ALL \| s s s s s s s s s s s s s s s s s s s x x x
415	#
416	#############################################################################
417	test_expect_success 'shared: one pack is redundant with --alt-odb' '
418	(
419	cd "$shared_repo" &&
420	git pack-redundant --all --alt-odb >out &&
421	format_packfiles <out >actual &&
422	test_line_count = 1 actual
423	)
424	'
425
426	#############################################################################
427	# Chart of packs and objects for this test case
428	#
429	# ================ master.git ===============
430	# \| T A B C D E F G H I J K L M N O P Q R <----------------+
431	# ----+-------------------------------------- \|
432	# P1 \| x x x x x x x x \|
433	# P3 \| x x x x x x \|
434	# P5 \| x x x x \|
435	# P7 \| x x \|
436	# ----+-------------------------------------- \|
437	# ALL \| x x x x x x x x x x x x x x x x x x x \|
438	# \|
439	# \|
440	# ================ shared.git ======================= \|
441	# \| T A B C D E F G H I J K L M N O P Q R X Y Z <objects/info/alternates>
442	# ----+----------------------------------------------
443	# Px1*\| s s s i i i
444	# Px2*\| s s s i i i
445	# ----+----------------------------------------------
446	# ALL \| s s s s s s s s s s s s s s s s s s s i i i
447	# (ignored objects, marked with i)
448	#
449	#############################################################################
450	test_expect_success 'shared: ignore unique objects and all two packs are redundant' '
451	(
452	cd "$shared_repo" &&
453	cat >expect <<-EOF &&
454	Px1:$Px1
455	Px2:$Px2
456	EOF
457	git pack-redundant --all --alt-odb >out <<-EOF &&
458	$X
459	$Y
460	$Z
461	EOF
462	format_packfiles <out >actual &&
463	test_cmp expect actual
464	)
465	'
466
467	test_done