reflog expire: do not punt on tags that point at non commits.

It is unusual for a tag to point at a non-commit, and it is also
unusual for a tag to have reflog, but that is not an error and
we should still prune its reflog entries just as other refs.

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

diff --git a/builtin-reflog.c b/builtin-reflog.c
index 4097c32..de31967 100644 (file)
--- a/builtin-reflog.c
+++ b/builtin-reflog.c
@@ -80,7 +80,8 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
                goto prune;
 
        if ((timestamp < cb->expire_unreachable) &&
-           ((old && !in_merge_bases(old, cb->ref_commit)) ||
+           (!cb->ref_commit ||
+            (old && !in_merge_bases(old, cb->ref_commit)) ||
             (new && !in_merge_bases(new, cb->ref_commit))))
                goto prune;
 
@@ -126,10 +127,9 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
        }
 
        cb.ref_commit = lookup_commit_reference_gently(sha1, 1);
-       if (!cb.ref_commit) {
-               status = error("ref '%s' does not point at a commit", ref);
-               goto finish;
-       }
+       if (!cb.ref_commit)
+               fprintf(stderr,
+                       "warning: ref '%s' does not point at a commit\n", ref);
        cb.ref = ref;
        cb.expire_total = cmd->expire_total;
        cb.expire_unreachable = cmd->expire_unreachable;