Merge branch 'np/maint-1.6.3-deepen'

* np/maint-1.6.3-deepen:
  fix simple deepening of a repo

Conflicts:
	t/t5500-fetch-pack.sh

1 files changed, 15 insertions, 1 deletions

diff --git a/transport.c b/transport.c
index faee154c38..f7e1663d18 100644
--- a/transport.c
+++ b/transport.c
@@ -1059,11 +1059,12 @@ const struct ref *transport_get_remote_refs(struct transport *transport)
 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 {
 	int rc;
-	int nr_heads = 0, nr_alloc = 0;
+	int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 	const struct ref **heads = NULL;
 	const struct ref *rm;
 
 	for (rm = refs; rm; rm = rm->next) {
+		nr_refs++;
 		if (rm->peer_ref &&
 		    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 			continue;
@@ -1071,6 +1072,19 @@ int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 		heads[nr_heads++] = rm;
 	}
 
+	if (!nr_heads) {
+		/*
+		 * When deepening of a shallow repository is requested,
+		 * then local and remote refs are likely to still be equal.
+		 * Just feed them all to the fetch method in that case.
+		 * This condition shouldn't be met in a non-deepening fetch
+		 * (see builtin-fetch.c:quickfetch()).
+		 */
+		heads = xmalloc(nr_refs * sizeof(*heads));
+		for (rm = refs; rm; rm = rm->next)
+			heads[nr_heads++] = rm;
+	}
+
 	rc = transport->fetch(transport, nr_heads, heads);
 	free(heads);
 	return rc;