[PATCH] remote: make prune work for mixed mirror/non-mirror repos

[Dennis Kaarsemaker <dennis@kaarsemaker.net>]

When cloning a repo with --mirror, and adding more remotes later,
get_stale_heads for origin would mark all refs from other repos as stale. In
this situation, with refs-src and refs->dst both equal to refs/*, we should
ignore refs/remotes/* when looking for stale refs to prevent this from
happening.

Signed-off-by: Dennis Kaarsemaker <dennis@kaarsemaker.net>
---
 remote.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/remote.c b/remote.c
index e71f66d..863c183 100644
--- a/remote.c
+++ b/remote.c
@@ -1884,6 +1884,7 @@ struct stale_heads_info {
 	struct ref **stale_refs_tail;
 	struct refspec *refs;
 	int ref_count;
+	int ignore_remotes;
 };
 
 static int get_stale_heads_cb(const char *refname,
@@ -1903,7 +1904,8 @@ static int get_stale_heads_cb(const char *refname,
 	 * remote we consider it to be stale.
 	 */
 	if (!((flags & REF_ISSYMREF) ||
-	      string_list_has_string(info->ref_names, query.src))) {
+	      string_list_has_string(info->ref_names, query.src) ||
+	      (info->ignore_remotes && !prefixcmp(refname, "refs/remotes/")))) {
 		struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
 		hashcpy(ref->new_sha1, sha1);
 	}
@@ -1917,6 +1919,8 @@ struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fet
 	struct ref *ref, *stale_refs = NULL;
 	struct string_list ref_names = STRING_LIST_INIT_NODUP;
 	struct stale_heads_info info;
+	if(!strcmp(refs->src, "refs/*") && !strcmp(refs->dst, "refs/*"))
+		info.ignore_remotes = 1;
 	info.ref_names = &ref_names;
 	info.stale_refs_tail = &stale_refs;
 	info.refs = refs;
-- 
1.8.3.1-619-gbec0aa7