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-rwxr-xr-xt/t7703-repack-geometric.sh284
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+#!/bin/sh
+
+test_description='git repack --geometric works correctly'
+
+. ./test-lib.sh
+
+GIT_TEST_MULTI_PACK_INDEX=0
+
+objdir=.git/objects
+packdir=$objdir/pack
+midx=$objdir/pack/multi-pack-index
+
+test_expect_success '--geometric with no packs' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ git repack --write-midx --geometric 2 >out &&
+ test_i18ngrep "Nothing new to pack" out
+ )
+'
+
+test_expect_success '--geometric with one pack' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ test_commit "base" &&
+ git repack -d &&
+
+ git repack --geometric 2 >out &&
+
+ test_i18ngrep "Nothing new to pack" out
+ )
+'
+
+test_expect_success '--geometric with an intact progression' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ # These packs already form a geometric progression.
+ test_commit_bulk --start=1 1 && # 3 objects
+ test_commit_bulk --start=2 2 && # 6 objects
+ test_commit_bulk --start=4 4 && # 12 objects
+
+ find $objdir/pack -name "*.pack" | sort >expect &&
+ git repack --geometric 2 -d &&
+ find $objdir/pack -name "*.pack" | sort >actual &&
+
+ test_cmp expect actual
+ )
+'
+
+test_expect_success '--geometric with loose objects' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ # These packs already form a geometric progression.
+ test_commit_bulk --start=1 1 && # 3 objects
+ test_commit_bulk --start=2 2 && # 6 objects
+ # The loose objects are packed together, breaking the
+ # progression.
+ test_commit loose && # 3 objects
+
+ find $objdir/pack -name "*.pack" | sort >before &&
+ git repack --geometric 2 -d &&
+ find $objdir/pack -name "*.pack" | sort >after &&
+
+ comm -13 before after >new &&
+ comm -23 before after >removed &&
+
+ test_line_count = 1 new &&
+ test_must_be_empty removed &&
+
+ git repack --geometric 2 -d &&
+ find $objdir/pack -name "*.pack" | sort >after &&
+
+ # The progression (3, 3, 6) is combined into one new pack.
+ test_line_count = 1 after
+ )
+'
+
+test_expect_success '--geometric with small-pack rollup' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ test_commit_bulk --start=1 1 && # 3 objects
+ test_commit_bulk --start=2 1 && # 3 objects
+ find $objdir/pack -name "*.pack" | sort >small &&
+ test_commit_bulk --start=3 4 && # 12 objects
+ test_commit_bulk --start=7 8 && # 24 objects
+ find $objdir/pack -name "*.pack" | sort >before &&
+
+ git repack --geometric 2 -d &&
+
+ # Three packs in total; two of the existing large ones, and one
+ # new one.
+ find $objdir/pack -name "*.pack" | sort >after &&
+ test_line_count = 3 after &&
+ comm -3 small before | tr -d "\t" >large &&
+ grep -qFf large after
+ )
+'
+
+test_expect_success '--geometric with small- and large-pack rollup' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ # size(small1) + size(small2) > size(medium) / 2
+ test_commit_bulk --start=1 1 && # 3 objects
+ test_commit_bulk --start=2 1 && # 3 objects
+ test_commit_bulk --start=2 3 && # 7 objects
+ test_commit_bulk --start=6 9 && # 27 objects &&
+
+ find $objdir/pack -name "*.pack" | sort >before &&
+
+ git repack --geometric 2 -d &&
+
+ find $objdir/pack -name "*.pack" | sort >after &&
+ comm -12 before after >untouched &&
+
+ # Two packs in total; the largest pack from before running "git
+ # repack", and one new one.
+ test_line_count = 1 untouched &&
+ test_line_count = 2 after
+ )
+'
+
+test_expect_success '--geometric ignores kept packs' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ test_commit kept && # 3 objects
+ test_commit pack && # 3 objects
+
+ KEPT=$(git pack-objects --revs $objdir/pack/pack <<-EOF
+ refs/tags/kept
+ EOF
+ ) &&
+ PACK=$(git pack-objects --revs $objdir/pack/pack <<-EOF
+ refs/tags/pack
+ ^refs/tags/kept
+ EOF
+ ) &&
+
+ # neither pack contains more than twice the number of objects in
+ # the other, so they should be combined. but, marking one as
+ # .kept on disk will "freeze" it, so the pack structure should
+ # remain unchanged.
+ touch $objdir/pack/pack-$KEPT.keep &&
+
+ find $objdir/pack -name "*.pack" | sort >before &&
+ git repack --geometric 2 -d &&
+ find $objdir/pack -name "*.pack" | sort >after &&
+
+ # both packs should still exist
+ test_path_is_file $objdir/pack/pack-$KEPT.pack &&
+ test_path_is_file $objdir/pack/pack-$PACK.pack &&
+
+ # and no new packs should be created
+ test_cmp before after &&
+
+ # Passing --pack-kept-objects causes packs with a .keep file to
+ # be repacked, too.
+ git repack --geometric 2 -d --pack-kept-objects &&
+
+ # After repacking, two packs remain: one new one (containing the
+ # objects in both the .keep and non-kept pack), and the .keep
+ # pack (since `--pack-kept-objects -d` does not actually delete
+ # the kept pack).
+ find $objdir/pack -name "*.pack" >after &&
+ test_line_count = 2 after
+ )
+'
+
+test_expect_success '--geometric ignores --keep-pack packs' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ # Create two equal-sized packs
+ test_commit kept && # 3 objects
+ git repack -d &&
+ test_commit pack && # 3 objects
+ git repack -d &&
+
+ find $objdir/pack -type f -name "*.pack" | sort >packs.before &&
+ git repack --geometric 2 -dm \
+ --keep-pack="$(basename "$(head -n 1 packs.before)")" >out &&
+ find $objdir/pack -type f -name "*.pack" | sort >packs.after &&
+
+ # Packs should not have changed (only one non-kept pack, no
+ # loose objects), but $midx should now exist.
+ grep "Nothing new to pack" out &&
+ test_path_is_file $midx &&
+
+ test_cmp packs.before packs.after &&
+
+ git fsck
+ )
+'
+
+test_expect_success '--geometric chooses largest MIDX preferred pack' '
+ git init geometric &&
+ test_when_finished "rm -fr geometric" &&
+ (
+ cd geometric &&
+
+ # These packs already form a geometric progression.
+ test_commit_bulk --start=1 1 && # 3 objects
+ test_commit_bulk --start=2 2 && # 6 objects
+ ls $objdir/pack/pack-*.idx >before &&
+ test_commit_bulk --start=4 4 && # 12 objects
+ ls $objdir/pack/pack-*.idx >after &&
+
+ git repack --geometric 2 -dbm &&
+
+ comm -3 before after | xargs -n 1 basename >expect &&
+ test-tool read-midx --preferred-pack $objdir >actual &&
+
+ test_cmp expect actual
+ )
+'
+
+test_expect_success '--geometric with pack.packSizeLimit' '
+ git init pack-rewrite &&
+ test_when_finished "rm -fr pack-rewrite" &&
+ (
+ cd pack-rewrite &&
+
+ test-tool genrandom foo 1048576 >foo &&
+ test-tool genrandom bar 1048576 >bar &&
+
+ git add foo bar &&
+ test_tick &&
+ git commit -m base &&
+
+ git rev-parse HEAD:foo HEAD:bar >p1.objects &&
+ git rev-parse HEAD HEAD^{tree} >p2.objects &&
+
+ # These two packs each contain two objects, so the following
+ # `--geometric` repack will try to combine them.
+ p1="$(git pack-objects $packdir/pack <p1.objects)" &&
+ p2="$(git pack-objects $packdir/pack <p2.objects)" &&
+
+ # Remove any loose objects in packs, since we do not want extra
+ # copies around (which would mask over potential object
+ # corruption issues).
+ git prune-packed &&
+
+ # Both p1 and p2 will be rolled up, but pack-objects will write
+ # three packs:
+ #
+ # - one containing object "foo",
+ # - another containing object "bar",
+ # - a final pack containing the commit and tree objects
+ # (identical to p2 above)
+ git repack --geometric 2 -d --max-pack-size=1048576 &&
+
+ # Ensure `repack` can detect that the third pack it wrote
+ # (containing just the tree and commit objects) was identical to
+ # one that was below the geometric split, so that we can save it
+ # from deletion.
+ #
+ # If `repack` fails to do that, we will incorrectly delete p2,
+ # causing object corruption.
+ git fsck
+ )
+'
+
+test_done