#!/bin/sh
test_description='pack-objects multi-pack reuse'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-bitmap.sh
GIT_TEST_MULTI_PACK_INDEX=0
GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=0
objdir=.git/objects
packdir=$objdir/pack
test_pack_reused () {
test_trace2_data pack-objects pack-reused "$1"
}
test_packs_reused () {
test_trace2_data pack-objects packs-reused "$1"
}
# pack_position <object> </path/to/pack.idx
pack_position () {
git show-index >objects &&
grep "$1" objects | cut -d" " -f1
}
# test_pack_objects_reused_all <pack-reused> <packs-reused>
test_pack_objects_reused_all () {
: >trace2.txt &&
GIT_TRACE2_EVENT="$PWD/trace2.txt" \
git pack-objects --stdout --revs --all --delta-base-offset \
>got.pack &&
test_pack_reused "$1" <trace2.txt &&
test_packs_reused "$2" <trace2.txt &&
git index-pack --strict -o got.idx got.pack
}
# test_pack_objects_reused <pack-reused> <packs-reused>
test_pack_objects_reused () {
: >trace2.txt &&
GIT_TRACE2_EVENT="$PWD/trace2.txt" \
git pack-objects --stdout --revs >got.pack &&
test_pack_reused "$1" <trace2.txt &&
test_packs_reused "$2" <trace2.txt &&
git index-pack --strict -o got.idx got.pack
}
test_expect_success 'preferred pack is reused for single-pack reuse' '
test_config pack.allowPackReuse single &&
for i in A B
do
test_commit "$i" &&
git repack -d || return 1
done &&
git multi-pack-index write --bitmap &&
test_pack_objects_reused_all 3 1
'
test_expect_success 'multi-pack reuse is disabled by default' '
test_pack_objects_reused_all 3 1
'
test_expect_success 'feature.experimental implies multi-pack reuse' '
test_config feature.experimental true &&
test_pack_objects_reused_all 6 2
'
test_expect_success 'multi-pack reuse can be disabled with feature.experimental' '
test_config feature.experimental true &&
test_config pack.allowPackReuse single &&
test_pack_objects_reused_all 3 1
'
test_expect_success 'enable multi-pack reuse' '
git config pack.allowPackReuse multi
'
test_expect_success 'reuse all objects from subset of bitmapped packs' '
test_commit C &&
git repack -d &&
git multi-pack-index write --bitmap &&
cat >in <<-EOF &&
$(git rev-parse C)
^$(git rev-parse A)
EOF
test_pack_objects_reused 6 2 <in
'
test_expect_success 'reuse all objects from all packs' '
test_pack_objects_reused_all 9 3
'
test_expect_success 'reuse objects from first pack with middle gap' '
for i in D E F
do
test_commit "$i" || return 1
done &&
# Set "pack.window" to zero to ensure that we do not create any
# deltas, which could alter the amount of pack reuse we perform
# (if, for e.g., we are not sending one or more bases).
D="$(git -c pack.window=0 pack-objects --all --unpacked $packdir/pack)" &&
d_pos="$(pack_position $(git rev-parse D) <$packdir/pack-$D.idx)" &&
e_pos="$(pack_position $(git rev-parse E) <$packdir/pack-$D.idx)" &&
f_pos="$(pack_position $(git rev-parse F) <$packdir/pack-$D.idx)" &&
# commits F, E, and D, should appear in that order at the
# beginning of the pack
test $f_pos -lt $e_pos &&
test $e_pos -lt $d_pos &&
# Ensure that the pack we are constructing sorts ahead of any
# other packs in lexical/bitmap order by choosing it as the
# preferred pack.
git multi-pack-index write --bitmap --preferred-pack="pack-$D.idx" &&
cat >in <<-EOF &&
$(git rev-parse E)
^$(git rev-parse D)
EOF
test_pack_objects_reused 3 1 <in
'
test_expect_success 'reuse objects from middle pack with middle gap' '
rm -fr $packdir/multi-pack-index* &&
# Ensure that the pack we are constructing sort into any
# position *but* the first one, by choosing a different pack as
# the preferred one.
git multi-pack-index write --bitmap --preferred-pack="pack-$A.idx" &&
cat >in <<-EOF &&
$(git rev-parse E)
^$(git rev-parse D)
EOF
test_pack_objects_reused 3 1 <in
'
test_expect_success 'omit delta with uninteresting base (same pack)' '
git repack -adk &&
test_seq 32 >f &&
git add f &&
test_tick &&
git commit -m "delta" &&
delta="$(git rev-parse HEAD)" &&
test_seq 64 >f &&
test_tick &&
git commit -a -m "base" &&
base="$(git rev-parse HEAD)" &&
test_commit other &&
git repack -d &&
have_delta "$(git rev-parse $delta:f)" "$(git rev-parse $base:f)" &&
git multi-pack-index write --bitmap &&
cat >in <<-EOF &&
$(git rev-parse other)
^$base
EOF
# We can only reuse the 3 objects corresponding to "other" from
# the latest pack.
#
# This is because even though we want "delta", we do not want
# "base", meaning that we have to inflate the delta/base-pair
# corresponding to the blob in commit "delta", which bypasses
# the pack-reuse mechanism.
#
# The remaining objects from the other pack are similarly not
# reused because their objects are on the uninteresting side of
# the query.
test_pack_objects_reused 3 1 <in
'
test_expect_success 'omit delta from uninteresting base (cross pack)' '
cat >in <<-EOF &&
$(git rev-parse $base)
^$(git rev-parse $delta)
EOF
P="$(git pack-objects --revs $packdir/pack <in)" &&
git multi-pack-index write --bitmap --preferred-pack="pack-$P.idx" &&
packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" &&
objects_nr="$(git rev-list --count --all --objects)" &&
test_pack_objects_reused_all $(($objects_nr - 1)) $packs_nr
'
test_expect_success 'non-omitted delta in MIDX preferred pack' '
test_config pack.allowPackReuse single &&
cat >p1.objects <<-EOF &&
$(git rev-parse $base)
^$(git rev-parse $delta^)
EOF
cat >p2.objects <<-EOF &&
$(git rev-parse F)
EOF
p1="$(git pack-objects --revs $packdir/pack <p1.objects)" &&
p2="$(git pack-objects --revs $packdir/pack <p2.objects)" &&
cat >in <<-EOF &&
pack-$p1.idx
pack-$p2.idx
EOF
git multi-pack-index write --bitmap --stdin-packs \
--preferred-pack=pack-$p1.pack <in &&
git show-index <$packdir/pack-$p1.idx >expect &&
test_pack_objects_reused_all $(wc -l <expect) 1
'
test_expect_success 'duplicate objects' '
git init duplicate-objects &&
(
cd duplicate-objects &&
git config pack.allowPackReuse multi &&
test_commit base &&
git repack -a &&
git rev-parse HEAD^{tree} >in &&
p="$(git pack-objects $packdir/pack <in)" &&
git multi-pack-index write --bitmap --preferred-pack=pack-$p.idx &&
objects_nr="$(git rev-list --count --all --objects)" &&
packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" &&
test_pack_objects_reused_all $objects_nr $packs_nr
)
'
test_done
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