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When repacking into a geometric series and writing a multi-pack bitmap, it is beneficial to have the largest resulting pack be the preferred object source in the bitmap's MIDX, since selecting the large packs can lead to fewer broken delta chains and better compression. Teach 'git repack' to identify this pack and pass it to the MIDX write machinery in order to mark it as preferred. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
206 lines
5.2 KiB
Bash
Executable File
206 lines
5.2 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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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 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_done
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