+ if (item->negative) {
+ struct object_id unused;
+
+ /*
+ * Negative refspecs only have a LHS, which indicates a ref
+ * (or pattern of refs) to exclude from other matches. This
+ * can either be a simple ref, or a glob pattern. Exact sha1
+ * match is not currently supported.
+ */
+ if (!*item->src)
+ return 0; /* negative refspecs must not be empty */
+ else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
+ return 0; /* negative refpsecs cannot be exact sha1 */
+ else if (!check_refname_format(item->src, flags))
+ ; /* valid looking ref is ok */
+ else
+ return 0;
+
+ /* the other rules below do not apply to negative refspecs */
+ return 1;
+ }
+