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pack-refs: prune top-level refs like "refs/foo"

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After we have packed all refs, we prune any loose refs that
correspond to what we packed. We do so by first taking a
lock with lock_ref_sha1, and then deleting the loose ref
file.

However, lock_ref_sha1 will refuse to take a lock on any
refs that exist at the top-level of the "refs/" directory,
and we skip pruning the ref.  This is almost certainly not
what we want to happen here. The criteria to be pruned
should not differ from that to be packed; if a ref makes it
to prune_ref, it's because we want it both packed and
pruned (if there are refs you do not want to be packed, they
should be omitted much earlier by pack_ref_is_possible,
which we do in this case if --all is not given).

We can fix this by switching to lock_any_ref_for_update.
This behaves exactly the same with the exception of this
top-level check.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Reviewed-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-08-23 01:27:07 -04:00 committed by Junio C Hamano
parent 32f56600bb
commit afd11d3ebc
2 changed files with 9 additions and 1 deletions
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3
refs.c
View file

@ -2353,7 +2353,8 @@ static void try_remove_empty_parents(char *name)
/* make sure nobody touched the ref, and unlink */
static void prune_ref(struct ref_to_prune *r)
{
struct ref_lock *lock = lock_ref_sha1(r->name + 5, r->sha1);
struct ref_lock *lock = lock_any_ref_for_update(r->name, r->sha1,
0, NULL);
if (lock) {
unlink_or_warn(git_path("%s", r->name));

7
t/t3210-pack-refs.sh
View file

@ -151,4 +151,11 @@ test_expect_success 'delete ref while another dangling packed ref' '
test_cmp /dev/null result
'
test_expect_success 'pack ref directly below refs/' '
git update-ref refs/top HEAD &&
git pack-refs --all --prune &&
grep refs/top .git/packed-refs &&
test_path_is_missing .git/refs/top
'
test_done