-extern int cgit_diff_files(const unsigned char *old_sha1,
- const unsigned char *new_sha1,
+void cgit_diff_tree_cb(struct diff_queue_struct *q,
+ struct diff_options *options, void *data);
+
+extern int cgit_diff_files(const struct object_id *old_oid,
+ const struct object_id *new_oid,