diff options
| -rwxr-xr-x | t/t1404-update-ref-errors.sh | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/t/t1404-update-ref-errors.sh b/t/t1404-update-ref-errors.sh index c34ece48f5..64a81345a8 100755 --- a/t/t1404-update-ref-errors.sh +++ b/t/t1404-update-ref-errors.sh @@ -404,4 +404,77 @@ test_expect_success 'broken reference blocks indirect create' ' test_cmp expected output.err ' +test_expect_failure 'no bogus intermediate values during delete' ' + prefix=refs/slow-transaction && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to update the reference, but hold the `packed-refs` lock + # for a while to see what happens while the process is blocked: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + { + # Note: the following command is intentionally run in the + # background. We increase the timeout so that `update-ref` + # attempts to acquire the `packed-refs` lock for longer than + # it takes for us to do the check then delete it: + git -c core.packedrefstimeout=3000 update-ref -d $prefix/foo & + } && + pid2=$! && + # Give update-ref plenty of time to get to the point where it tries + # to lock packed-refs: + sleep 1 && + # Make sure that update-ref did not complete despite the lock: + kill -0 $pid2 && + # Verify that the reference still has its old value: + sha1=$(git rev-parse --verify --quiet $prefix/foo || echo undefined) && + case "$sha1" in + $D) + # This is what we hope for; it means that nothing + # user-visible has changed yet. + : ;; + undefined) + # This is not correct; it means the deletion has happened + # already even though update-ref should not have been + # able to acquire the lock yet. + echo "$prefix/foo deleted prematurely" && + break + ;; + $C) + # This value should never be seen. Probably the loose + # reference has been deleted but the packed reference + # is still there: + echo "$prefix/foo incorrectly observed to be C" && + break + ;; + *) + # WTF? + echo "unexpected value observed for $prefix/foo: $sha1" && + break + ;; + esac >out && + rm -f .git/packed-refs.lock && + wait $pid2 && + test_must_be_empty out && + test_must_fail git rev-parse --verify --quiet $prefix/foo +' + +test_expect_failure 'delete fails cleanly if packed-refs file is locked' ' + prefix=refs/locked-packed-refs && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to delete it while the `packed-refs` lock is held: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + test_must_fail git update-ref -d $prefix/foo >out 2>err && + git for-each-ref $prefix >actual && + test_i18ngrep "Unable to create $Q.*packed-refs.lock$Q: File exists" err && + test_cmp unchanged actual +' + test_done |