fetch-pack: add a deref_without_lazy_fetch_extended()

Add a version of the deref_without_lazy_fetch function which can be
called with custom oi_flags and to grab information about the
"object_type". This will be used for the bundle-uri client in a
subsequent commit.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

fetch-pack.c

@@ -115,11 +115,12 @@ static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
 		cb(negotiator, cache.items[i]);
 }
 
-static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
-					       int mark_tags_complete)
+static struct commit *deref_without_lazy_fetch_extended(const struct object_id *oid,
+							int mark_tags_complete,
+							enum object_type *type,
+							unsigned int oi_flags)
 {
-	enum object_type type;
-	struct object_info info = { .typep = &type };
+	struct object_info info = { .typep = type };
 	struct commit *commit;
 
 	commit = lookup_commit_in_graph(the_repository, oid);
@@ -128,9 +129,9 @@ static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
 
 	while (1) {
 		if (oid_object_info_extended(the_repository, oid, &info,
-					     OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK))
+					     oi_flags))
 			return NULL;
-		if (type == OBJ_TAG) {
+		if (*type == OBJ_TAG) {
 			struct tag *tag = (struct tag *)
 				parse_object(the_repository, oid);
 
@@ -144,7 +145,7 @@ static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
 		}
 	}
 
-	if (type == OBJ_COMMIT) {
+	if (*type == OBJ_COMMIT) {
 		struct commit *commit = lookup_commit(the_repository, oid);
 		if (!commit || repo_parse_commit(the_repository, commit))
 			return NULL;
@@ -154,6 +155,16 @@ static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
 	return NULL;
 }
 
+
+static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
+					       int mark_tags_complete)
+{
+	enum object_type type;
+	unsigned flags = OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK;
+	return deref_without_lazy_fetch_extended(oid, mark_tags_complete,
+						 &type, flags);
+}
+
 static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
 			       const struct object_id *oid)
 {