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66731ff921
The previous patch demonstrates a scenario where the list of packs
written by `pack-objects` (and stored in the `names` string_list) is
out-of-order, and can thus cause us to delete packs we shouldn't.
This patch resolves that bug by ensuring that `names` is sorted in all
cases, not just when
delete_redundant && pack_everything & ALL_INTO_ONE
is true.
Because we did sort `names` in that case (which, prior to `--geometric`
repacks, was the only time we would actually delete packs, this is only
a bug for `--geometric` repacks.
It would be sufficient to only sort `names` when `delete_redundant` is
set to a non-zero value. But sorting a small list of strings is cheap,
and it is defensive against future calls to `string_list_has_string()`
on this list.
Co-discovered-by: Victoria Dye <vdye@github.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
281 lines
7.4 KiB
Bash
Executable File
281 lines
7.4 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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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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find $objdir/pack -name "*.pack" >after &&
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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 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_done
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