2023-12-14 22:24:44 +00:00
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#!/bin/sh
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test_description='pack-objects multi-pack reuse'
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2024-01-29 21:08:27 +00:00
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TEST_PASSES_SANITIZE_LEAK=true
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2023-12-14 22:24:44 +00:00
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-bitmap.sh
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objdir=.git/objects
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packdir=$objdir/pack
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test_pack_reused () {
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test_trace2_data pack-objects pack-reused "$1"
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}
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test_packs_reused () {
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test_trace2_data pack-objects packs-reused "$1"
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}
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# pack_position <object> </path/to/pack.idx
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pack_position () {
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git show-index >objects &&
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grep "$1" objects | cut -d" " -f1
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}
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2024-02-05 22:50:19 +00:00
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# test_pack_objects_reused_all <pack-reused> <packs-reused>
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test_pack_objects_reused_all () {
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: >trace2.txt &&
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GIT_TRACE2_EVENT="$PWD/trace2.txt" \
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git pack-objects --stdout --revs --all --delta-base-offset \
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>/dev/null &&
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test_pack_reused "$1" <trace2.txt &&
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test_packs_reused "$2" <trace2.txt
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}
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# test_pack_objects_reused <pack-reused> <packs-reused>
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test_pack_objects_reused () {
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: >trace2.txt &&
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GIT_TRACE2_EVENT="$PWD/trace2.txt" \
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git pack-objects --stdout --revs >/dev/null &&
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test_pack_reused "$1" <trace2.txt &&
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test_packs_reused "$2" <trace2.txt
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}
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2023-12-14 22:24:44 +00:00
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test_expect_success 'preferred pack is reused for single-pack reuse' '
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test_config pack.allowPackReuse single &&
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for i in A B
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do
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test_commit "$i" &&
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git repack -d || return 1
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done &&
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git multi-pack-index write --bitmap &&
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2024-02-05 22:50:19 +00:00
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test_pack_objects_reused_all 3 1
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'
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2024-02-05 22:50:23 +00:00
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test_expect_success 'multi-pack reuse is disabled by default' '
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test_pack_objects_reused_all 3 1
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'
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test_expect_success 'feature.experimental implies multi-pack reuse' '
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test_config feature.experimental true &&
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test_pack_objects_reused_all 6 2
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'
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test_expect_success 'multi-pack reuse can be disabled with feature.experimental' '
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test_config feature.experimental true &&
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test_config pack.allowPackReuse single &&
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2023-12-14 22:24:44 +00:00
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2024-02-05 22:50:23 +00:00
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test_pack_objects_reused_all 3 1
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2023-12-14 22:24:44 +00:00
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'
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test_expect_success 'enable multi-pack reuse' '
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git config pack.allowPackReuse multi
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'
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test_expect_success 'reuse all objects from subset of bitmapped packs' '
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test_commit C &&
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git repack -d &&
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git multi-pack-index write --bitmap &&
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cat >in <<-EOF &&
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$(git rev-parse C)
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^$(git rev-parse A)
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EOF
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2024-02-05 22:50:19 +00:00
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test_pack_objects_reused 6 2 <in
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'
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test_expect_success 'reuse all objects from all packs' '
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test_pack_objects_reused_all 9 3
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'
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test_expect_success 'reuse objects from first pack with middle gap' '
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for i in D E F
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do
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test_commit "$i" || return 1
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done &&
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# Set "pack.window" to zero to ensure that we do not create any
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# deltas, which could alter the amount of pack reuse we perform
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# (if, for e.g., we are not sending one or more bases).
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D="$(git -c pack.window=0 pack-objects --all --unpacked $packdir/pack)" &&
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d_pos="$(pack_position $(git rev-parse D) <$packdir/pack-$D.idx)" &&
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e_pos="$(pack_position $(git rev-parse E) <$packdir/pack-$D.idx)" &&
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f_pos="$(pack_position $(git rev-parse F) <$packdir/pack-$D.idx)" &&
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# commits F, E, and D, should appear in that order at the
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# beginning of the pack
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test $f_pos -lt $e_pos &&
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test $e_pos -lt $d_pos &&
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# Ensure that the pack we are constructing sorts ahead of any
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# other packs in lexical/bitmap order by choosing it as the
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# preferred pack.
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git multi-pack-index write --bitmap --preferred-pack="pack-$D.idx" &&
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cat >in <<-EOF &&
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$(git rev-parse E)
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^$(git rev-parse D)
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EOF
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test_pack_objects_reused 3 1 <in
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'
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test_expect_success 'reuse objects from middle pack with middle gap' '
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rm -fr $packdir/multi-pack-index* &&
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# Ensure that the pack we are constructing sort into any
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# position *but* the first one, by choosing a different pack as
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# the preferred one.
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git multi-pack-index write --bitmap --preferred-pack="pack-$A.idx" &&
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cat >in <<-EOF &&
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$(git rev-parse E)
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^$(git rev-parse D)
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EOF
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test_pack_objects_reused 3 1 <in
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'
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test_expect_success 'omit delta with uninteresting base (same pack)' '
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git repack -adk &&
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test_seq 32 >f &&
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git add f &&
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test_tick &&
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git commit -m "delta" &&
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delta="$(git rev-parse HEAD)" &&
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test_seq 64 >f &&
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test_tick &&
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git commit -a -m "base" &&
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base="$(git rev-parse HEAD)" &&
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test_commit other &&
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git repack -d &&
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have_delta "$(git rev-parse $delta:f)" "$(git rev-parse $base:f)" &&
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git multi-pack-index write --bitmap &&
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cat >in <<-EOF &&
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$(git rev-parse other)
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^$base
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EOF
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# We can only reuse the 3 objects corresponding to "other" from
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# the latest pack.
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#
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# This is because even though we want "delta", we do not want
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# "base", meaning that we have to inflate the delta/base-pair
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# corresponding to the blob in commit "delta", which bypasses
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# the pack-reuse mechanism.
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#
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# The remaining objects from the other pack are similarly not
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# reused because their objects are on the uninteresting side of
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# the query.
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test_pack_objects_reused 3 1 <in
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'
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test_expect_success 'omit delta from uninteresting base (cross pack)' '
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cat >in <<-EOF &&
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$(git rev-parse $base)
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^$(git rev-parse $delta)
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EOF
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P="$(git pack-objects --revs $packdir/pack <in)" &&
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git multi-pack-index write --bitmap --preferred-pack="pack-$P.idx" &&
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packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" &&
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objects_nr="$(git rev-list --count --all --objects)" &&
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2024-02-05 22:50:19 +00:00
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test_pack_objects_reused_all $(($objects_nr - 1)) $packs_nr
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'
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test_done
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