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https://github.com/git/git
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932c16c04b
When the user passes `-l` to git-repack(1), then they essentially ask us to only repack objects part of the local object database while ignoring any packfiles part of an alternate object database. And we in fact honor this bit when doing a geometric repack as the resulting packfile will only ever contain local objects. What we're missing though is that we don't take locality of packfiles into account when computing whether the geometric sequence is intact or not. So even though we would only ever roll up local packfiles anyway, we could end up trying to repack because of non-local packfiles. This does not make much sense, and in the worst case it can cause us to try and do the geometric repack over and over again because we're never able to restore the geometric sequence. Fix this bug by honoring whether the user has passed `-l`. If so, we skip adding any non-local packfiles to the pack geometry. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
422 lines
13 KiB
Bash
Executable File
422 lines
13 KiB
Bash
Executable File
#!/bin/sh
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test_description='git repack --geometric works correctly'
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. ./test-lib.sh
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GIT_TEST_MULTI_PACK_INDEX=0
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objdir=.git/objects
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packdir=$objdir/pack
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midx=$objdir/pack/multi-pack-index
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packed_objects () {
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git show-index <"$1" >tmp-object-list &&
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cut -d' ' -f2 tmp-object-list | sort &&
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rm tmp-object-list
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}
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test_expect_success '--geometric with no packs' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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git repack --write-midx --geometric 2 >out &&
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test_i18ngrep "Nothing new to pack" out
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)
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'
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test_expect_success '--geometric with one pack' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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test_commit "base" &&
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git repack -d &&
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git repack --geometric 2 >out &&
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test_i18ngrep "Nothing new to pack" out
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)
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'
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test_expect_success '--geometric with an intact progression' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# These packs already form a geometric progression.
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test_commit_bulk --start=1 1 && # 3 objects
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test_commit_bulk --start=2 2 && # 6 objects
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test_commit_bulk --start=4 4 && # 12 objects
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find $objdir/pack -name "*.pack" | sort >expect &&
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git repack --geometric 2 -d &&
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find $objdir/pack -name "*.pack" | sort >actual &&
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test_cmp expect actual
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)
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'
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test_expect_success '--geometric with loose objects' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# These packs already form a geometric progression.
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test_commit_bulk --start=1 1 && # 3 objects
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test_commit_bulk --start=2 2 && # 6 objects
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# The loose objects are packed together, breaking the
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# progression.
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test_commit loose && # 3 objects
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find $objdir/pack -name "*.pack" | sort >before &&
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git repack --geometric 2 -d &&
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find $objdir/pack -name "*.pack" | sort >after &&
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comm -13 before after >new &&
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comm -23 before after >removed &&
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test_line_count = 1 new &&
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test_must_be_empty removed &&
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git repack --geometric 2 -d &&
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find $objdir/pack -name "*.pack" | sort >after &&
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# The progression (3, 3, 6) is combined into one new pack.
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test_line_count = 1 after
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)
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'
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test_expect_success '--geometric with small-pack rollup' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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test_commit_bulk --start=1 1 && # 3 objects
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test_commit_bulk --start=2 1 && # 3 objects
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find $objdir/pack -name "*.pack" | sort >small &&
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test_commit_bulk --start=3 4 && # 12 objects
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test_commit_bulk --start=7 8 && # 24 objects
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find $objdir/pack -name "*.pack" | sort >before &&
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git repack --geometric 2 -d &&
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# Three packs in total; two of the existing large ones, and one
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# new one.
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find $objdir/pack -name "*.pack" | sort >after &&
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test_line_count = 3 after &&
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comm -3 small before | tr -d "\t" >large &&
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grep -qFf large after
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)
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'
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test_expect_success '--geometric with small- and large-pack rollup' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# size(small1) + size(small2) > size(medium) / 2
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test_commit_bulk --start=1 1 && # 3 objects
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test_commit_bulk --start=2 1 && # 3 objects
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test_commit_bulk --start=2 3 && # 7 objects
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test_commit_bulk --start=6 9 && # 27 objects &&
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find $objdir/pack -name "*.pack" | sort >before &&
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git repack --geometric 2 -d &&
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find $objdir/pack -name "*.pack" | sort >after &&
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comm -12 before after >untouched &&
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# Two packs in total; the largest pack from before running "git
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# repack", and one new one.
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test_line_count = 1 untouched &&
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test_line_count = 2 after
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)
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'
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test_expect_success '--geometric ignores kept packs' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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test_commit kept && # 3 objects
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test_commit pack && # 3 objects
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KEPT=$(git pack-objects --revs $objdir/pack/pack <<-EOF
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refs/tags/kept
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EOF
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) &&
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PACK=$(git pack-objects --revs $objdir/pack/pack <<-EOF
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refs/tags/pack
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^refs/tags/kept
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EOF
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) &&
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# neither pack contains more than twice the number of objects in
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# the other, so they should be combined. but, marking one as
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# .kept on disk will "freeze" it, so the pack structure should
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# remain unchanged.
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touch $objdir/pack/pack-$KEPT.keep &&
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find $objdir/pack -name "*.pack" | sort >before &&
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git repack --geometric 2 -d &&
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find $objdir/pack -name "*.pack" | sort >after &&
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# both packs should still exist
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test_path_is_file $objdir/pack/pack-$KEPT.pack &&
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test_path_is_file $objdir/pack/pack-$PACK.pack &&
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# and no new packs should be created
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test_cmp before after &&
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# Passing --pack-kept-objects causes packs with a .keep file to
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# be repacked, too.
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git repack --geometric 2 -d --pack-kept-objects &&
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# After repacking, two packs remain: one new one (containing the
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# objects in both the .keep and non-kept pack), and the .keep
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# pack (since `--pack-kept-objects -d` does not actually delete
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# the kept pack).
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find $objdir/pack -name "*.pack" >after &&
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test_line_count = 2 after
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)
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'
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test_expect_success '--geometric ignores --keep-pack packs' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# Create two equal-sized packs
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test_commit kept && # 3 objects
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git repack -d &&
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test_commit pack && # 3 objects
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git repack -d &&
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find $objdir/pack -type f -name "*.pack" | sort >packs.before &&
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git repack --geometric 2 -dm \
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--keep-pack="$(basename "$(head -n 1 packs.before)")" >out &&
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find $objdir/pack -type f -name "*.pack" | sort >packs.after &&
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# Packs should not have changed (only one non-kept pack, no
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# loose objects), but $midx should now exist.
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grep "Nothing new to pack" out &&
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test_path_is_file $midx &&
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test_cmp packs.before packs.after &&
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git fsck
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)
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'
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test_expect_success '--geometric chooses largest MIDX preferred pack' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# These packs already form a geometric progression.
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test_commit_bulk --start=1 1 && # 3 objects
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test_commit_bulk --start=2 2 && # 6 objects
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ls $objdir/pack/pack-*.idx >before &&
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test_commit_bulk --start=4 4 && # 12 objects
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ls $objdir/pack/pack-*.idx >after &&
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git repack --geometric 2 -dbm &&
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comm -3 before after | xargs -n 1 basename >expect &&
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test-tool read-midx --preferred-pack $objdir >actual &&
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test_cmp expect actual
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)
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'
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test_expect_success '--geometric with pack.packSizeLimit' '
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git init pack-rewrite &&
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test_when_finished "rm -fr pack-rewrite" &&
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(
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cd pack-rewrite &&
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test-tool genrandom foo 1048576 >foo &&
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test-tool genrandom bar 1048576 >bar &&
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git add foo bar &&
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test_tick &&
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git commit -m base &&
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git rev-parse HEAD:foo HEAD:bar >p1.objects &&
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git rev-parse HEAD HEAD^{tree} >p2.objects &&
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# These two packs each contain two objects, so the following
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# `--geometric` repack will try to combine them.
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p1="$(git pack-objects $packdir/pack <p1.objects)" &&
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p2="$(git pack-objects $packdir/pack <p2.objects)" &&
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# Remove any loose objects in packs, since we do not want extra
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# copies around (which would mask over potential object
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# corruption issues).
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git prune-packed &&
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# Both p1 and p2 will be rolled up, but pack-objects will write
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# three packs:
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#
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# - one containing object "foo",
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# - another containing object "bar",
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# - a final pack containing the commit and tree objects
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# (identical to p2 above)
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git repack --geometric 2 -d --max-pack-size=1048576 &&
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# Ensure `repack` can detect that the third pack it wrote
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# (containing just the tree and commit objects) was identical to
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# one that was below the geometric split, so that we can save it
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# from deletion.
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#
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# If `repack` fails to do that, we will incorrectly delete p2,
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# causing object corruption.
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git fsck
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)
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'
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test_expect_success '--geometric --write-midx with packfiles in main and alternate ODB' '
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test_when_finished "rm -fr shared member" &&
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# Create a shared repository that will serve as the alternate object
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# database for the member linked to it. It has got some objects on its
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# own that are packed into a single packfile.
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git init shared &&
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test_commit -C shared common-object &&
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git -C shared repack -ad &&
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# We create member so that its alternates file points to the shared
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# repository. We then create a commit in it so that git-repack(1) has
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# something to repack.
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# of the shared object database.
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git clone --shared shared member &&
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test_commit -C member unique-object &&
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git -C member repack --geometric=2 --write-midx 2>err &&
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test_must_be_empty err &&
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# We should see that a new packfile was generated.
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find shared/.git/objects/pack -type f -name "*.pack" >packs &&
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test_line_count = 1 packs &&
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# We should also see a multi-pack-index. This multi-pack-index should
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# never refer to any packfiles in the alternate object database.
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test_path_is_file member/.git/objects/pack/multi-pack-index &&
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test-tool read-midx member/.git/objects >packs.midx &&
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grep "^pack-.*\.idx$" packs.midx | sort >actual &&
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basename member/.git/objects/pack/pack-*.idx >expect &&
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test_cmp expect actual
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'
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test_expect_success '--geometric --with-midx with no local objects' '
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test_when_finished "rm -fr shared member" &&
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# Create a repository with a single packfile that acts as alternate
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# object database.
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git init shared &&
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test_commit -C shared "shared-objects" &&
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git -C shared repack -ad &&
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# Create a second repository linked to the first one and perform a
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# geometric repack on it.
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git clone --shared shared member &&
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git -C member repack --geometric 2 --write-midx 2>err &&
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test_must_be_empty err &&
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# Assert that we wrote neither a new packfile nor a multi-pack-index.
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# We should not have a packfile because the single packfile in the
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# alternate object database does not invalidate the geometric sequence.
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# And we should not have a multi-pack-index because these only index
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# local packfiles, and there are none.
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test_dir_is_empty member/$packdir
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'
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test_expect_success '--geometric with same pack in main and alternate ODB' '
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test_when_finished "rm -fr shared member" &&
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# Create a repository with a single packfile that acts as alternate
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# object database.
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git init shared &&
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test_commit -C shared "shared-objects" &&
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git -C shared repack -ad &&
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# We create the member repository as an exact copy so that it has the
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# same packfile.
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cp -r shared member &&
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test-tool path-utils real_path shared/.git/objects >member/.git/objects/info/alternates &&
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find shared/.git/objects -type f >expected-files &&
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# Verify that we can repack objects as expected without observing any
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# error. Having the same packfile in both ODBs used to cause an error
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# in git-pack-objects(1).
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git -C member repack --geometric 2 2>err &&
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test_must_be_empty err &&
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# Nothing should have changed.
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find shared/.git/objects -type f >actual-files &&
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test_cmp expected-files actual-files
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'
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test_expect_success '--geometric -l with non-intact geometric sequence across ODBs' '
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test_when_finished "rm -fr shared member" &&
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git init shared &&
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test_commit_bulk -C shared --start=1 1 &&
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git clone --shared shared member &&
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test_commit_bulk -C member --start=2 1 &&
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# Verify that our assumptions actually hold: both generated packfiles
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# should have three objects and should be non-equal.
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packed_objects shared/.git/objects/pack/pack-*.idx >shared-objects &&
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packed_objects member/.git/objects/pack/pack-*.idx >member-objects &&
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test_line_count = 3 shared-objects &&
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test_line_count = 3 member-objects &&
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! test_cmp shared-objects member-objects &&
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# Perform the geometric repack. With `-l`, we should only see the local
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# packfile and thus arrive at the conclusion that the geometric
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# sequence is intact. We thus expect no changes.
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#
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# Note that we are tweaking mtimes of the packfiles so that we can
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# verify they did not change. This is done in order to detect the case
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# where we do repack objects, but the resulting packfile is the same.
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test-tool chmtime --verbose =0 member/.git/objects/pack/* >expected-member-packs &&
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git -C member repack --geometric=2 -l -d &&
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test-tool chmtime --verbose member/.git/objects/pack/* >actual-member-packs &&
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test_cmp expected-member-packs actual-member-packs &&
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{
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packed_objects shared/.git/objects/pack/pack-*.idx &&
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packed_objects member/.git/objects/pack/pack-*.idx
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} | sort >expected-objects &&
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# On the other hand, when doing a non-local geometric repack we should
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# see both packfiles and thus repack them. We expect that the shared
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# object database was not changed.
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test-tool chmtime --verbose =0 shared/.git/objects/pack/* >expected-shared-packs &&
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git -C member repack --geometric=2 -d &&
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test-tool chmtime --verbose shared/.git/objects/pack/* >actual-shared-packs &&
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test_cmp expected-shared-packs actual-shared-packs &&
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# Furthermore, we expect that the member repository now has a single
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# packfile that contains the combined shared and non-shared objects.
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ls member/.git/objects/pack/pack-*.idx >actual &&
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test_line_count = 1 actual &&
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packed_objects member/.git/objects/pack/pack-*.idx >actual-objects &&
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test_line_count = 6 actual-objects &&
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test_cmp expected-objects actual-objects
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'
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test_done
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