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Diffstat (limited to '')
| -rwxr-xr-x | t/t7703-repack-geometric.sh | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/t/t7703-repack-geometric.sh b/t/t7703-repack-geometric.sh new file mode 100755 index 0000000..9fc1626 --- /dev/null +++ b/t/t7703-repack-geometric.sh @@ -0,0 +1,448 @@ +#!/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 + +packed_objects () { + git show-index <"$1" >tmp-object-list && + cut -d' ' -f2 tmp-object-list | sort && + rm tmp-object-list + } + +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_grep "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_grep "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_expect_success '--geometric --write-midx with packfiles in main and alternate ODB' ' + test_when_finished "rm -fr shared member" && + + # Create a shared repository that will serve as the alternate object + # database for the member linked to it. It has got some objects on its + # own that are packed into a single packfile. + git init shared && + test_commit -C shared common-object && + git -C shared repack -ad && + + # We create member so that its alternates file points to the shared + # repository. We then create a commit in it so that git-repack(1) has + # something to repack. + # of the shared object database. + git clone --shared shared member && + test_commit -C member unique-object && + git -C member repack --geometric=2 --write-midx 2>err && + test_must_be_empty err && + + # We should see that a new packfile was generated. + find shared/.git/objects/pack -type f -name "*.pack" >packs && + test_line_count = 1 packs && + + # We should also see a multi-pack-index. This multi-pack-index should + # never refer to any packfiles in the alternate object database. + test_path_is_file member/.git/objects/pack/multi-pack-index && + test-tool read-midx member/.git/objects >packs.midx && + grep "^pack-.*\.idx$" packs.midx | sort >actual && + basename member/.git/objects/pack/pack-*.idx >expect && + test_cmp expect actual +' + +test_expect_success '--geometric --with-midx with no local objects' ' + test_when_finished "rm -fr shared member" && + + # Create a repository with a single packfile that acts as alternate + # object database. + git init shared && + test_commit -C shared "shared-objects" && + git -C shared repack -ad && + + # Create a second repository linked to the first one and perform a + # geometric repack on it. + git clone --shared shared member && + git -C member repack --geometric 2 --write-midx 2>err && + test_must_be_empty err && + + # Assert that we wrote neither a new packfile nor a multi-pack-index. + # We should not have a packfile because the single packfile in the + # alternate object database does not invalidate the geometric sequence. + # And we should not have a multi-pack-index because these only index + # local packfiles, and there are none. + test_dir_is_empty member/$packdir +' + +test_expect_success '--geometric with same pack in main and alternate ODB' ' + test_when_finished "rm -fr shared member" && + + # Create a repository with a single packfile that acts as alternate + # object database. + git init shared && + test_commit -C shared "shared-objects" && + git -C shared repack -ad && + + # We create the member repository as an exact copy so that it has the + # same packfile. + cp -r shared member && + test-tool path-utils real_path shared/.git/objects >member/.git/objects/info/alternates && + find shared/.git/objects -type f >expected-files && + + # Verify that we can repack objects as expected without observing any + # error. Having the same packfile in both ODBs used to cause an error + # in git-pack-objects(1). + git -C member repack --geometric 2 2>err && + test_must_be_empty err && + # Nothing should have changed. + find shared/.git/objects -type f >actual-files && + test_cmp expected-files actual-files +' + +test_expect_success '--geometric -l with non-intact geometric sequence across ODBs' ' + test_when_finished "rm -fr shared member" && + + git init shared && + test_commit_bulk -C shared --start=1 1 && + + git clone --shared shared member && + test_commit_bulk -C member --start=2 1 && + + # Verify that our assumptions actually hold: both generated packfiles + # should have three objects and should be non-equal. + packed_objects shared/.git/objects/pack/pack-*.idx >shared-objects && + packed_objects member/.git/objects/pack/pack-*.idx >member-objects && + test_line_count = 3 shared-objects && + test_line_count = 3 member-objects && + ! test_cmp shared-objects member-objects && + + # Perform the geometric repack. With `-l`, we should only see the local + # packfile and thus arrive at the conclusion that the geometric + # sequence is intact. We thus expect no changes. + # + # Note that we are tweaking mtimes of the packfiles so that we can + # verify they did not change. This is done in order to detect the case + # where we do repack objects, but the resulting packfile is the same. + test-tool chmtime --verbose =0 member/.git/objects/pack/* >expected-member-packs && + git -C member repack --geometric=2 -l -d && + test-tool chmtime --verbose member/.git/objects/pack/* >actual-member-packs && + test_cmp expected-member-packs actual-member-packs && + + { + packed_objects shared/.git/objects/pack/pack-*.idx && + packed_objects member/.git/objects/pack/pack-*.idx + } | sort >expected-objects && + + # On the other hand, when doing a non-local geometric repack we should + # see both packfiles and thus repack them. We expect that the shared + # object database was not changed. + test-tool chmtime --verbose =0 shared/.git/objects/pack/* >expected-shared-packs && + git -C member repack --geometric=2 -d && + test-tool chmtime --verbose shared/.git/objects/pack/* >actual-shared-packs && + test_cmp expected-shared-packs actual-shared-packs && + + # Furthermore, we expect that the member repository now has a single + # packfile that contains the combined shared and non-shared objects. + ls member/.git/objects/pack/pack-*.idx >actual && + test_line_count = 1 actual && + packed_objects member/.git/objects/pack/pack-*.idx >actual-objects && + test_line_count = 6 actual-objects && + test_cmp expected-objects actual-objects +' + +test_expect_success '--geometric -l disables writing bitmaps with non-local packfiles' ' + test_when_finished "rm -fr shared member" && + + git init shared && + test_commit_bulk -C shared --start=1 1 && + + git clone --shared shared member && + test_commit_bulk -C member --start=2 1 && + + # When performing a geometric repack with `-l` while connected to an + # alternate object database that has a packfile we do not have full + # coverage of objects. As a result, we expect that writing the bitmap + # will be disabled. + git -C member repack -l --geometric=2 --write-midx --write-bitmap-index 2>err && + cat >expect <<-EOF && + warning: disabling bitmap writing, as some objects are not being packed + EOF + test_cmp expect err && + test_path_is_missing member/.git/objects/pack/multi-pack-index-*.bitmap && + + # On the other hand, when we repack without `-l`, we should see that + # the bitmap gets created. + git -C member repack --geometric=2 --write-midx --write-bitmap-index 2>err && + test_must_be_empty err && + test_path_is_file member/.git/objects/pack/multi-pack-index-*.bitmap +' + +test_done |