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git/t/t5323-pack-redundant.sh

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#!/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