eggplants/extension-manifest-converter

# Copyright 2021 Google Inc. 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.

from __future__ import annotations

import os
import sys
import zipfile


class Unzip:
    def unzip(self, source: str, destination: str) -> None:
        with zipfile.ZipFile(source, "r") as zip_ref:
            zip_ref.extractall(destination)

    def extract(self, source: str, destination: str, foldername: str) -> None:
        sentinel = False
        with zipfile.ZipFile(source, "r") as zip_ref:
            list = zip_ref.namelist()
            if len(list) == 0:
                return
            for path in list:
                if path == "manifest.json":
                    sentinel = True
                    break
            if not sentinel:
                self.extractFirstDirectory(source, destination, foldername)
            else:
                outfile = destination + os.sep + foldername
                os.mkdir(outfile)
                for path in list:
                    zip_ref.extract(path, destination + os.sep + foldername)

    def extractFirstDirectory(
        self, source: str, destination: str, foldername: str
    ) -> None:
        with zipfile.ZipFile(source, "r") as zip_ref:
            list = zip_ref.namelist()
            if len(list) == 0:
                return
            prefix = list[0]
            for x in list[1:]:
                if x.startswith(prefix):
                    zip_ref.extract(x, destination)
        # TODO: Remove slash in path for OS independence.
        os.rename(destination + os.sep + prefix, destination + os.sep + foldername)


def main() -> None:
    if len(sys.argv) != 2:
        return
    path = sys.argv[1]
    dirname = os.path.dirname(path)
    Unzip().unzip(path, dirname)


if __name__ == "__main__":
    main()