import sys

from bakery_cli.scripts import genmetadata


def main(argv=None):
    if argv is None:
        argv = sys.argv
    if len(argv) != 2:
        genmetadata.usage()
        return 1
    genmetadata.run(argv[1])
    return 0

if __name__ == '__main__':
    sys.exit(main())

#!/usr/bin/env python
# coding: utf-8
# Copyright 2013 The Font Bakery Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# See AUTHORS.txt for the list of Authors and LICENSE.txt for the License.
import sys

from bakery_cli.scripts import genmetadata


def main(argv=None):
    if argv is None:
        argv = sys.argv
    if len(argv) != 2:
        genmetadata.usage()
        return 1
    genmetadata.run(argv[1])
    return 0

if __name__ == '__main__':
    sys.exit(main())

Add license and shebang to build-metadata.py