+ if (!index_lock) {
+ index_lock = xcalloc(1, sizeof(struct lock_file));
+ fd = hold_locked_index(index_lock, 1);
+ }
+
+ if (read_cache() < 0)
+ return error("Could not read index");
+ result = refresh_cache(0) ? 1 : 0;
+ if (write_cache(fd, active_cache, active_nr) ||
+ close(fd) ||
+ commit_locked_index(index_lock))
+ return error ("Could not refresh index");
+ return result;
+}