Fix send-pack for non-commitish tags.

Again I left the v2.6.11-tree tag behind.  My bad.

This commit makes sure that we do not barf when pushing a ref
that is a non-commitish tag.  You can update a remote ref under
the following conditions:

 * You can always use --force.
 * Creating a brand new ref is OK.
 * If the remote ref is exactly the same as what you are
   pushing, it is OK (nothing is pushed).
 * You can replace a commitish with another commitish which is a
   descendant of it, if you can verify the ancestry between them;
   this and the above means you have to have what you are replacing.
 * Otherwise you cannot update; you need to use --force.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 4 deletions

diff --git a/commit.c b/commit.c
index 6db31651c2..3ac421ac34 100644
--- a/commit.c
+++ b/commit.c
@@ -48,13 +48,10 @@ static struct commit *check_commit(struct object *obj, const unsigned char *sha1
 
 struct commit *lookup_commit_reference(const unsigned char *sha1)
 {
-	struct object *obj = parse_object(sha1);
+	struct object *obj = deref_tag(parse_object(sha1));
 
 	if (!obj)
 		return NULL;
-	while (obj->type == tag_type)
-		obj = parse_object(((struct tag *)obj)->tagged->sha1);
-
 	return check_commit(obj, sha1);
 }