addlicense.py

import os
import glob
from typing import List


preamble = """
Copyright 2020 (c) Netguru S.A.
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."""


def get_file_list(data_dir: str) -> List[str]:
    files_list = glob.glob(os.path.join(
        data_dir, "**", "*.py"), recursive=True)
    files_list = [file for file in files_list if "__init__" not in file]
    return files_list


def prepend_preamble(filename: str, preamble: str) -> None:
    with open(filename, "r+") as f:
        content = f.read()
        f.seek(0, 0)
        f.write(preamble + "\n\n" + content)


def add_preamble_to_files(preamble: str, files_list: List[str]) -> None:
    for file in files_list:
        prepend_preamble(file, preamble)


if __name__ == "__main__":
    files = get_file_list(".")
    preamble = ["# " + line for line in preamble.split("\n")]
    preamble = "\n".join(preamble)
    add_preamble_to_files(preamble, files)