refs: move head_ref{,_submodule} to the common code

diff --git a/refs.c b/refs.c
index b0e6ece6f43437bb7d59490d64802baa3b277090..6b8c16cdd834b3294ef2e3817162b17494e47404 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1080,3 +1080,26 @@ int rename_ref_available(const char *oldname, const char *newname)
        strbuf_release(&err);
        return ret;
 }
+
+int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+{
+       struct object_id oid;
+       int flag;
+
+       if (submodule) {
+               if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0)
+                       return fn("HEAD", &oid, 0, cb_data);
+
+               return 0;
+       }
+
+       if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag))
+               return fn("HEAD", &oid, flag, cb_data);
+
+       return 0;
+}
+
+int head_ref(each_ref_fn fn, void *cb_data)
+{
+       return head_ref_submodule(NULL, fn, cb_data);
+}