base_ref = args.revision
        g = subprocess.Popen(["git", "ls-tree", "-r", base_ref, "--name-only", "menu"], stdout=subprocess.PIPE, encoding="utf-8")
        flist, _ = g.communicate()
        for fn in flist.splitlines():
                g = subprocess.Popen(["git", "show", "%s:%s" % (base_ref, fn)], stdout=subprocess.PIPE, encoding="utf-8")
                all[fn] = json.load(g.stdout)