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git/t/t5319-multi-pack-index.sh
Taylor Blau 9218c6a40c midx: allow marking a pack as preferred 
When multiple packs in the multi-pack index contain the same object, the
MIDX machinery must make a choice about which pack it associates with
that object. Prior to this patch, the lowest-ordered[1] pack was always
selected.

Pack selection for duplicate objects is relatively unimportant today,
but it will become important for multi-pack bitmaps. This is because we
can only invoke the pack-reuse mechanism when all of the bits for reused
objects come from the reuse pack (in order to ensure that all reused
deltas can find their base objects in the same pack).

To encourage the pack selection process to prefer one pack over another
(the pack to be preferred is the one a caller would like to later use as
a reuse pack), introduce the concept of a "preferred pack". When
provided, the MIDX code will always prefer an object found in a
preferred pack over any other.

No format changes are required to store the preferred pack, since it
will be able to be inferred with a corresponding MIDX bitmap, by looking
up the pack associated with the object in the first bit position (this
ordering is described in detail in a subsequent commit).

[1]: the ordering is specified by MIDX internals; for our purposes we
can consider the "lowest ordered" pack to be "the one with the
most-recent mtime.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-01 13:07:37 -07:00

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#!/bin/sh
test_description='multi-pack-indexes'
. ./test-lib.sh
GIT_TEST_MULTI_PACK_INDEX=0
objdir=.git/objects
HASH_LEN=$(test_oid rawsz)
midx_read_expect () {
NUM_PACKS=$1
NUM_OBJECTS=$2
NUM_CHUNKS=$3
OBJECT_DIR=$4
EXTRA_CHUNKS="$5"
{
cat <<-EOF &&
header: 4d494458 1 $HASH_LEN $NUM_CHUNKS $NUM_PACKS
chunks: pack-names oid-fanout oid-lookup object-offsets$EXTRA_CHUNKS
num_objects: $NUM_OBJECTS
packs:
EOF
if test $NUM_PACKS -ge 1
then
ls $OBJECT_DIR/pack/ | grep idx | sort
fi &&
printf "object-dir: $OBJECT_DIR\n"
} >expect &&
test-tool read-midx $OBJECT_DIR >actual &&
test_cmp expect actual
}
test_expect_success 'setup' '
test_oid_cache <<-EOF
idxoff sha1:2999
idxoff sha256:3739
packnameoff sha1:652
packnameoff sha256:940
fanoutoff sha1:1
fanoutoff sha256:3
EOF
'
test_expect_success "don't write midx with no packs" '
test_must_fail git multi-pack-index --object-dir=. write &&
test_path_is_missing pack/multi-pack-index
'
test_expect_success SHA1 'warn if a midx contains no oid' '
cp "$TEST_DIRECTORY"/t5319/no-objects.midx $objdir/pack/multi-pack-index &&
test_must_fail git multi-pack-index verify &&
rm $objdir/pack/multi-pack-index
'
generate_objects () {
i=$1
iii=$(printf '%03i' $i)
{
test-tool genrandom "bar" 200 &&
test-tool genrandom "baz $iii" 50
} >wide_delta_$iii &&
{
test-tool genrandom "foo"$i 100 &&
test-tool genrandom "foo"$(( $i + 1 )) 100 &&
test-tool genrandom "foo"$(( $i + 2 )) 100
} >deep_delta_$iii &&
{
echo $iii &&
test-tool genrandom "$iii" 8192
} >file_$iii &&
git update-index --add file_$iii deep_delta_$iii wide_delta_$iii
}
commit_and_list_objects () {
{
echo 101 &&
test-tool genrandom 100 8192;
} >file_101 &&
git update-index --add file_101 &&
tree=$(git write-tree) &&
commit=$(git commit-tree $tree -p HEAD</dev/null) &&
{
echo $tree &&
git ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\) .*/\\1/"
} >obj-list &&
git reset --hard $commit
}
test_expect_success 'create objects' '
test_commit initial &&
for i in $(test_seq 1 5)
do
generate_objects $i
done &&
commit_and_list_objects
'
test_expect_success 'write midx with one v1 pack' '
pack=$(git pack-objects --index-version=1 $objdir/pack/test <obj-list) &&
test_when_finished rm $objdir/pack/test-$pack.pack \
$objdir/pack/test-$pack.idx $objdir/pack/multi-pack-index &&
git multi-pack-index --object-dir=$objdir write &&
midx_read_expect 1 18 4 $objdir
'
midx_git_two_modes () {
git -c core.multiPackIndex=false $1 >expect &&
git -c core.multiPackIndex=true $1 >actual &&
if [ "$2" = "sorted" ]
then
sort <expect >expect.sorted &&
mv expect.sorted expect &&
sort <actual >actual.sorted &&
mv actual.sorted actual
fi &&
test_cmp expect actual
}
compare_results_with_midx () {
MSG=$1
test_expect_success "check normal git operations: $MSG" '
midx_git_two_modes "rev-list --objects --all" &&
midx_git_two_modes "log --raw" &&
midx_git_two_modes "count-objects --verbose" &&
midx_git_two_modes "cat-file --batch-all-objects --batch-check" &&
midx_git_two_modes "cat-file --batch-all-objects --batch-check --unordered" sorted
'
}
test_expect_success 'write midx with one v2 pack' '
git pack-objects --index-version=2,0x40 $objdir/pack/test <obj-list &&
git multi-pack-index --object-dir=$objdir write &&
midx_read_expect 1 18 4 $objdir
'
compare_results_with_midx "one v2 pack"
test_expect_success 'corrupt idx reports errors' '
idx=$(test-tool read-midx $objdir | grep "\.idx\$") &&
mv $objdir/pack/$idx backup-$idx &&
test_when_finished "mv backup-\$idx \$objdir/pack/\$idx" &&
# This is the minimum size for a sha-1 based .idx; this lets
# us pass perfunctory tests, but anything that actually opens and reads
# the idx file will complain.
test_copy_bytes 1064 <backup-$idx >$objdir/pack/$idx &&
git -c core.multiPackIndex=true rev-list --objects --all 2>err &&
grep "index unavailable" err
'
test_expect_success 'add more objects' '
for i in $(test_seq 6 10)
do
generate_objects $i
done &&
commit_and_list_objects
'
test_expect_success 'write midx with two packs' '
git pack-objects --index-version=1 $objdir/pack/test-2 <obj-list &&
git multi-pack-index --object-dir=$objdir write &&
midx_read_expect 2 34 4 $objdir
'
compare_results_with_midx "two packs"
test_expect_success 'write progress off for redirected stderr' '
git multi-pack-index --object-dir=$objdir write 2>err &&
test_line_count = 0 err
'
test_expect_success 'write force progress on for stderr' '
GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir --progress write 2>err &&
test_file_not_empty err
'
test_expect_success 'write with the --no-progress option' '
GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir --no-progress write 2>err &&
test_line_count = 0 err
'
test_expect_success 'add more packs' '
for j in $(test_seq 11 20)
do
generate_objects $j &&
commit_and_list_objects &&
git pack-objects --index-version=2 $objdir/pack/test-pack <obj-list
done
'
compare_results_with_midx "mixed mode (two packs + extra)"
test_expect_success 'write midx with twelve packs' '
git multi-pack-index --object-dir=$objdir write &&
midx_read_expect 12 74 4 $objdir
'
compare_results_with_midx "twelve packs"
test_expect_success 'warn on improper hash version' '
git init --object-format=sha1 sha1 &&
(
cd sha1 &&
git config core.multiPackIndex true &&
test_commit 1 &&
git repack -a &&
git multi-pack-index write &&
mv .git/objects/pack/multi-pack-index ../mpi-sha1
) &&
git init --object-format=sha256 sha256 &&
(
cd sha256 &&
git config core.multiPackIndex true &&
test_commit 1 &&
git repack -a &&
git multi-pack-index write &&
mv .git/objects/pack/multi-pack-index ../mpi-sha256
) &&
(
cd sha1 &&
mv ../mpi-sha256 .git/objects/pack/multi-pack-index &&
git log -1 2>err &&
test_i18ngrep "multi-pack-index hash version 2 does not match version 1" err
) &&
(
cd sha256 &&
mv ../mpi-sha1 .git/objects/pack/multi-pack-index &&
git log -1 2>err &&
test_i18ngrep "multi-pack-index hash version 1 does not match version 2" err
)
'
test_expect_success 'midx picks objects from preferred pack' '
test_when_finished rm -rf preferred.git &&
git init --bare preferred.git &&
(
cd preferred.git &&
a=$(echo "a" | git hash-object -w --stdin) &&
b=$(echo "b" | git hash-object -w --stdin) &&
c=$(echo "c" | git hash-object -w --stdin) &&
# Set up two packs, duplicating the object "B" at different
# offsets.
#
# Note that the "BC" pack (the one we choose as preferred) sorts
# lexically after the "AB" pack, meaning that omitting the
# --preferred-pack argument would cause this test to fail (since
# the MIDX code would select the copy of "b" in the "AB" pack).
git pack-objects objects/pack/test-AB <<-EOF &&
$a
$b
EOF
bc=$(git pack-objects objects/pack/test-BC <<-EOF
$b
$c
EOF
) &&
git multi-pack-index --object-dir=objects \
write --preferred-pack=test-BC-$bc.idx 2>err &&
test_must_be_empty err &&
test-tool read-midx --show-objects objects >out &&
ofs=$(git show-index <objects/pack/test-BC-$bc.idx | grep $b |
cut -d" " -f1) &&
printf "%s %s\tobjects/pack/test-BC-%s.pack\n" \
"$b" "$ofs" "$bc" >expect &&
grep ^$b out >actual &&
test_cmp expect actual
)
'
test_expect_success 'verify multi-pack-index success' '
git multi-pack-index verify --object-dir=$objdir
'
test_expect_success 'verify progress off for redirected stderr' '
git multi-pack-index verify --object-dir=$objdir 2>err &&
test_line_count = 0 err
'
test_expect_success 'verify force progress on for stderr' '
git multi-pack-index verify --object-dir=$objdir --progress 2>err &&
test_file_not_empty err
'
test_expect_success 'verify with the --no-progress option' '
git multi-pack-index verify --object-dir=$objdir --no-progress 2>err &&
test_line_count = 0 err
'
# usage: corrupt_midx_and_verify <pos> <data> <objdir> <string>
corrupt_midx_and_verify() {
POS=$1 &&
DATA="${2:-\0}" &&
OBJDIR=$3 &&
GREPSTR="$4" &&
COMMAND="$5" &&
if test -z "$COMMAND"
then
COMMAND="git multi-pack-index verify --object-dir=$OBJDIR"
fi &&
FILE=$OBJDIR/pack/multi-pack-index &&
chmod a+w $FILE &&
test_when_finished mv midx-backup $FILE &&
cp $FILE midx-backup &&
printf "$DATA" | dd of="$FILE" bs=1 seek="$POS" conv=notrunc &&
test_must_fail $COMMAND 2>test_err &&
grep -v "^+" test_err >err &&
test_i18ngrep "$GREPSTR" err
}
test_expect_success 'verify bad signature' '
corrupt_midx_and_verify 0 "\00" $objdir \
"multi-pack-index signature"
'
NUM_OBJECTS=74
MIDX_BYTE_VERSION=4
MIDX_BYTE_OID_VERSION=5
MIDX_BYTE_CHUNK_COUNT=6
MIDX_HEADER_SIZE=12
MIDX_BYTE_CHUNK_ID=$MIDX_HEADER_SIZE
MIDX_BYTE_CHUNK_OFFSET=$(($MIDX_HEADER_SIZE + 4))
MIDX_NUM_CHUNKS=5
MIDX_CHUNK_LOOKUP_WIDTH=12
MIDX_OFFSET_PACKNAMES=$(($MIDX_HEADER_SIZE + \
$MIDX_NUM_CHUNKS * $MIDX_CHUNK_LOOKUP_WIDTH))
MIDX_BYTE_PACKNAME_ORDER=$(($MIDX_OFFSET_PACKNAMES + 2))
MIDX_OFFSET_OID_FANOUT=$(($MIDX_OFFSET_PACKNAMES + $(test_oid packnameoff)))
MIDX_OID_FANOUT_WIDTH=4
MIDX_BYTE_OID_FANOUT_ORDER=$((MIDX_OFFSET_OID_FANOUT + 250 * $MIDX_OID_FANOUT_WIDTH + $(test_oid fanoutoff)))
MIDX_OFFSET_OID_LOOKUP=$(($MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH))
MIDX_BYTE_OID_LOOKUP=$(($MIDX_OFFSET_OID_LOOKUP + 16 * $HASH_LEN))
MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN))
MIDX_OFFSET_WIDTH=8
MIDX_BYTE_PACK_INT_ID=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 2))
MIDX_BYTE_OFFSET=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 6))
test_expect_success 'verify bad version' '
corrupt_midx_and_verify $MIDX_BYTE_VERSION "\00" $objdir \
"multi-pack-index version"
'
test_expect_success 'verify bad OID version' '
corrupt_midx_and_verify $MIDX_BYTE_OID_VERSION "\03" $objdir \
"hash version"
'
test_expect_success 'verify truncated chunk count' '
corrupt_midx_and_verify $MIDX_BYTE_CHUNK_COUNT "\01" $objdir \
"final chunk has non-zero id"
'
test_expect_success 'verify extended chunk count' '
corrupt_midx_and_verify $MIDX_BYTE_CHUNK_COUNT "\07" $objdir \
"terminating chunk id appears earlier than expected"
'
test_expect_success 'verify missing required chunk' '
corrupt_midx_and_verify $MIDX_BYTE_CHUNK_ID "\01" $objdir \
"missing required"
'
test_expect_success 'verify invalid chunk offset' '
corrupt_midx_and_verify $MIDX_BYTE_CHUNK_OFFSET "\01" $objdir \
"improper chunk offset(s)"
'
test_expect_success 'verify packnames out of order' '
corrupt_midx_and_verify $MIDX_BYTE_PACKNAME_ORDER "z" $objdir \
"pack names out of order"
'
test_expect_success 'verify packnames out of order' '
corrupt_midx_and_verify $MIDX_BYTE_PACKNAME_ORDER "a" $objdir \
"failed to load pack"
'
test_expect_success 'verify oid fanout out of order' '
corrupt_midx_and_verify $MIDX_BYTE_OID_FANOUT_ORDER "\01" $objdir \
"oid fanout out of order"
'
test_expect_success 'verify oid lookup out of order' '
corrupt_midx_and_verify $MIDX_BYTE_OID_LOOKUP "\00" $objdir \
"oid lookup out of order"
'
test_expect_success 'verify incorrect pack-int-id' '
corrupt_midx_and_verify $MIDX_BYTE_PACK_INT_ID "\07" $objdir \
"bad pack-int-id"
'
test_expect_success 'verify incorrect offset' '
corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
"incorrect object offset"
'
test_expect_success 'git-fsck incorrect offset' '
corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
"incorrect object offset" \
"git -c core.multipackindex=true fsck"
'
test_expect_success 'repack progress off for redirected stderr' '
GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir repack 2>err &&
test_line_count = 0 err
'
test_expect_success 'repack force progress on for stderr' '
GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir --progress repack 2>err &&
test_file_not_empty err
'
test_expect_success 'repack with the --no-progress option' '
GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir --no-progress repack 2>err &&
test_line_count = 0 err
'
test_expect_success 'repack removes multi-pack-index when deleting packs' '
test_path_is_file $objdir/pack/multi-pack-index &&
# Set GIT_TEST_MULTI_PACK_INDEX to 0 to avoid writing a new
# multi-pack-index after repacking, but set "core.multiPackIndex" to
# true so that "git repack" can read the existing MIDX.
GIT_TEST_MULTI_PACK_INDEX=0 git -c core.multiPackIndex repack -adf &&
test_path_is_missing $objdir/pack/multi-pack-index
'
test_expect_success 'repack preserves multi-pack-index when creating packs' '
git init preserve &&
test_when_finished "rm -fr preserve" &&
(
cd preserve &&
packdir=.git/objects/pack &&
midx=$packdir/multi-pack-index &&
test_commit 1 &&
pack1=$(git pack-objects --all $packdir/pack) &&
touch $packdir/pack-$pack1.keep &&
test_commit 2 &&
pack2=$(git pack-objects --revs $packdir/pack) &&
touch $packdir/pack-$pack2.keep &&
git multi-pack-index write &&
cp $midx $midx.bak &&
cat >pack-input <<-EOF &&
HEAD
^HEAD~1
EOF
test_commit 3 &&
pack3=$(git pack-objects --revs $packdir/pack <pack-input) &&
test_commit 4 &&
pack4=$(git pack-objects --revs $packdir/pack <pack-input) &&
GIT_TEST_MULTI_PACK_INDEX=0 git -c core.multiPackIndex repack -ad &&
ls -la $packdir &&
test_path_is_file $packdir/pack-$pack1.pack &&
test_path_is_file $packdir/pack-$pack2.pack &&
test_path_is_missing $packdir/pack-$pack3.pack &&
test_path_is_missing $packdir/pack-$pack4.pack &&
test_cmp_bin $midx.bak $midx
)
'
compare_results_with_midx "after repack"
test_expect_success 'multi-pack-index and pack-bitmap' '
git -c repack.writeBitmaps=true repack -ad &&
git multi-pack-index write &&
git rev-list --test-bitmap HEAD
'
test_expect_success 'multi-pack-index and alternates' '
git init --bare alt.git &&
echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
echo content1 >file1 &&
altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
git cat-file blob $altblob &&
git rev-list --all
'
compare_results_with_midx "with alternate (local midx)"
test_expect_success 'multi-pack-index in an alternate' '
mv .git/objects/pack/* alt.git/objects/pack &&
test_commit add_local_objects &&
git repack --local &&
git multi-pack-index write &&
midx_read_expect 1 3 4 $objdir &&
git reset --hard HEAD~1 &&
rm -f .git/objects/pack/*
'
compare_results_with_midx "with alternate (remote midx)"
# usage: corrupt_data <file> <pos> [<data>]
corrupt_data () {
file=$1
pos=$2
data="${3:-\0}"
printf "$data" | dd of="$file" bs=1 seek="$pos" conv=notrunc
}
# Force 64-bit offsets by manipulating the idx file.
# This makes the IDX file _incorrect_ so be careful to clean up after!
test_expect_success 'force some 64-bit offsets with pack-objects' '
mkdir objects64 &&
mkdir objects64/pack &&
for i in $(test_seq 1 11)
do
generate_objects 11
done &&
commit_and_list_objects &&
pack64=$(git pack-objects --index-version=2,0x40 objects64/pack/test-64 <obj-list) &&
idx64=objects64/pack/test-64-$pack64.idx &&
chmod u+w $idx64 &&
corrupt_data $idx64 $(test_oid idxoff) "\02" &&
midx64=$(git multi-pack-index --object-dir=objects64 write) &&
midx_read_expect 1 63 5 objects64 " large-offsets"
'
test_expect_success 'verify multi-pack-index with 64-bit offsets' '
git multi-pack-index verify --object-dir=objects64
'
NUM_OBJECTS=63
MIDX_OFFSET_OID_FANOUT=$((MIDX_OFFSET_PACKNAMES + 54))
MIDX_OFFSET_OID_LOOKUP=$((MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH))
MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN))
MIDX_OFFSET_LARGE_OFFSETS=$(($MIDX_OFFSET_OBJECT_OFFSETS + $NUM_OBJECTS * $MIDX_OFFSET_WIDTH))
MIDX_BYTE_LARGE_OFFSET=$(($MIDX_OFFSET_LARGE_OFFSETS + 3))
test_expect_success 'verify incorrect 64-bit offset' '
corrupt_midx_and_verify $MIDX_BYTE_LARGE_OFFSET "\07" objects64 \
"incorrect object offset"
'
test_expect_success 'setup expire tests' '
mkdir dup &&
(
cd dup &&
git init &&
test-tool genrandom "data" 4096 >large_file.txt &&
git update-index --add large_file.txt &&
for i in $(test_seq 1 20)
do
test_commit $i
done &&
git branch A HEAD &&
git branch B HEAD~8 &&
git branch C HEAD~13 &&
git branch D HEAD~16 &&
git branch E HEAD~18 &&
git pack-objects --revs .git/objects/pack/pack-A <<-EOF &&
refs/heads/A
^refs/heads/B
EOF
git pack-objects --revs .git/objects/pack/pack-B <<-EOF &&
refs/heads/B
^refs/heads/C
EOF
git pack-objects --revs .git/objects/pack/pack-C <<-EOF &&
refs/heads/C
^refs/heads/D
EOF
git pack-objects --revs .git/objects/pack/pack-D <<-EOF &&
refs/heads/D
^refs/heads/E
EOF
git pack-objects --revs .git/objects/pack/pack-E <<-EOF &&
refs/heads/E
EOF
git multi-pack-index write &&
cp -r .git/objects/pack .git/objects/pack-backup
)
'
test_expect_success 'expire does not remove any packs' '
(
cd dup &&
ls .git/objects/pack >expect &&
git multi-pack-index expire &&
ls .git/objects/pack >actual &&
test_cmp expect actual
)
'
test_expect_success 'expire progress off for redirected stderr' '
(
cd dup &&
git multi-pack-index expire 2>err &&
test_line_count = 0 err
)
'
test_expect_success 'expire force progress on for stderr' '
(
cd dup &&
GIT_PROGRESS_DELAY=0 git multi-pack-index --progress expire 2>err &&
test_file_not_empty err
)
'
test_expect_success 'expire with the --no-progress option' '
(
cd dup &&
GIT_PROGRESS_DELAY=0 git multi-pack-index --no-progress expire 2>err &&
test_line_count = 0 err
)
'
test_expect_success 'expire removes unreferenced packs' '
(
cd dup &&
git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
refs/heads/A
^refs/heads/C
EOF
git multi-pack-index write &&
ls .git/objects/pack | grep -v -e pack-[AB] >expect &&
git multi-pack-index expire &&
ls .git/objects/pack >actual &&
test_cmp expect actual &&
ls .git/objects/pack/ | grep idx >expect-idx &&
test-tool read-midx .git/objects | grep idx >actual-midx &&
test_cmp expect-idx actual-midx &&
git multi-pack-index verify &&
git fsck
)
'
test_expect_success 'repack with minimum size does not alter existing packs' '
(
cd dup &&
rm -rf .git/objects/pack &&
mv .git/objects/pack-backup .git/objects/pack &&
test-tool chmtime =-5 .git/objects/pack/pack-D* &&
test-tool chmtime =-4 .git/objects/pack/pack-C* &&
test-tool chmtime =-3 .git/objects/pack/pack-B* &&
test-tool chmtime =-2 .git/objects/pack/pack-A* &&
ls .git/objects/pack >expect &&
MINSIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | head -n 1) &&
git multi-pack-index repack --batch-size=$MINSIZE &&
ls .git/objects/pack >actual &&
test_cmp expect actual
)
'
test_expect_success 'repack respects repack.packKeptObjects=false' '
test_when_finished rm -f dup/.git/objects/pack/*keep &&
(
cd dup &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 5 idx-list &&
ls .git/objects/pack/*.pack | sed "s/\.pack/.keep/" >keep-list &&
test_line_count = 5 keep-list &&
for keep in $(cat keep-list)
do
touch $keep || return 1
done &&
git multi-pack-index repack --batch-size=0 &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 5 idx-list &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 5 midx-list &&
THIRD_SMALLEST_SIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | sed -n 3p) &&
BATCH_SIZE=$((THIRD_SMALLEST_SIZE + 1)) &&
git multi-pack-index repack --batch-size=$BATCH_SIZE &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 5 idx-list &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 5 midx-list
)
'
test_expect_success 'repack creates a new pack' '
(
cd dup &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 5 idx-list &&
THIRD_SMALLEST_SIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | head -n 3 | tail -n 1) &&
BATCH_SIZE=$(($THIRD_SMALLEST_SIZE + 1)) &&
git multi-pack-index repack --batch-size=$BATCH_SIZE &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 6 idx-list &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 6 midx-list
)
'
test_expect_success 'expire removes repacked packs' '
(
cd dup &&
ls -al .git/objects/pack/*pack &&
ls -S .git/objects/pack/*pack | head -n 4 >expect &&
git multi-pack-index expire &&
ls -S .git/objects/pack/*pack >actual &&
test_cmp expect actual &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 4 midx-list
)
'
test_expect_success 'expire works when adding new packs' '
(
cd dup &&
git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
refs/heads/A
^refs/heads/B
EOF
git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
refs/heads/B
^refs/heads/C
EOF
git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
refs/heads/C
^refs/heads/D
EOF
git multi-pack-index write &&
git pack-objects --revs .git/objects/pack/a-pack <<-EOF &&
refs/heads/D
^refs/heads/E
EOF
git multi-pack-index write &&
git pack-objects --revs .git/objects/pack/z-pack <<-EOF &&
refs/heads/E
EOF
git multi-pack-index expire &&
ls .git/objects/pack/ | grep idx >expect &&
test-tool read-midx .git/objects | grep idx >actual &&
test_cmp expect actual &&
git multi-pack-index verify
)
'
test_expect_success 'expire respects .keep files' '
(
cd dup &&
git pack-objects --revs .git/objects/pack/pack-all <<-EOF &&
refs/heads/A
EOF
git multi-pack-index write &&
PACKA=$(ls .git/objects/pack/a-pack*\.pack | sed s/\.pack\$//) &&
touch $PACKA.keep &&
git multi-pack-index expire &&
test_path_is_file $PACKA.idx &&
test_path_is_file $PACKA.keep &&
test_path_is_file $PACKA.pack &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 2 midx-list
)
'
test_expect_success 'repack --batch-size=0 repacks everything' '
cp -r dup dup2 &&
(
cd dup &&
rm .git/objects/pack/*.keep &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 2 idx-list &&
git multi-pack-index repack --batch-size=0 &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 3 idx-list &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 3 midx-list &&
git multi-pack-index expire &&
ls -al .git/objects/pack/*idx >idx-list &&
test_line_count = 1 idx-list &&
git multi-pack-index repack --batch-size=0 &&
ls -al .git/objects/pack/*idx >new-idx-list &&
test_cmp idx-list new-idx-list
)
'
test_expect_success 'repack --batch-size=<large> repacks everything' '
(
cd dup2 &&
rm .git/objects/pack/*.keep &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 2 idx-list &&
git multi-pack-index repack --batch-size=2000000 &&
ls .git/objects/pack/*idx >idx-list &&
test_line_count = 3 idx-list &&
test-tool read-midx .git/objects | grep idx >midx-list &&
test_line_count = 3 midx-list &&
git multi-pack-index expire &&
ls -al .git/objects/pack/*idx >idx-list &&
test_line_count = 1 idx-list
)
'
test_expect_success 'load reverse index when missing .idx, .pack' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
git config core.multiPackIndex true &&
test_commit base &&
git repack -ad &&
git multi-pack-index write &&
git rev-parse HEAD >tip &&
pack=$(ls .git/objects/pack/pack-*.pack) &&
idx=$(ls .git/objects/pack/pack-*.idx) &&
mv $idx $idx.bak &&
git cat-file --batch-check="%(objectsize:disk)" <tip &&
mv $idx.bak $idx &&
mv $pack $pack.bak &&
git cat-file --batch-check="%(objectsize:disk)" <tip
)
'
test_done
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