midx: add test that 'expire' respects .keep files

The 'git multi-pack-index expire' subcommand may delete packs that are not needed from the perspective of the multi-pack-index. If a pack has a .keep file, then we should not delete that pack. Add a test that ensures we preserve a pack that would otherwise be expired. First, create a new pack that contains every object in the repo, then add it to the multi-pack-index. Then create a .keep file for a pack starting with "a-pack" that was added in the previous test. Finally, expire and verify that the pack remains and the other packs were expired. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Derrick Stolee committed Jun 10, 2019 at 16:35 UTC 10bfa3f7f58406a5799267e4844fcd3f9ec16097
1 file changed +18
t/t5319-multi-pack-index.sh
+18
@@ -510,4 +510,22 @@ test_expect_success 'expire works when adding new packs' '
510 )
511 '
512
513 +test_expect_success 'expire respects .keep files' '
514 + (
515 + cd dup &&
516 + git pack-objects --revs .git/objects/pack/pack-all <<-EOF &&
517 + refs/heads/A
518 + EOF
519 + git multi-pack-index write &&
520 + PACKA=$(ls .git/objects/pack/a-pack*\.pack | sed s/\.pack\$//) &&
521 + touch $PACKA.keep &&
522 + git multi-pack-index expire &&
523 + ls -S .git/objects/pack/a-pack* | grep $PACKA >a-pack-files &&
524 + test_line_count = 3 a-pack-files &&
525 + test-tool read-midx .git/objects | grep idx >midx-list &&
526 + test_line_count = 2 midx-list
527 + )
528 +'
529 +
530 +
531 test_done