1# Copyright (C) 2019 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#      http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14"""Script to wrap protoc execution.
15
16This script exists to work-around the bad depfile generation by protoc when
17generating descriptors."""
18
19from __future__ import print_function
20import argparse
21import os
22import sys
23import subprocess
24import tempfile
25import uuid
26
27from codecs import open
28
29
30def main():
31  parser = argparse.ArgumentParser()
32  parser.add_argument('--descriptor_set_out', default=None)
33  parser.add_argument('--dependency_out', default=None)
34  parser.add_argument('protoc')
35  args, remaining = parser.parse_known_args()
36
37  if args.dependency_out and args.descriptor_set_out:
38    tmp_path = os.path.join(tempfile.gettempdir(), str(uuid.uuid4()))
39    custom = [
40        '--descriptor_set_out', args.descriptor_set_out, '--dependency_out',
41        tmp_path
42    ]
43    try:
44      cmd = [args.protoc] + custom + remaining
45      subprocess.check_call(cmd)
46      with open(tmp_path, 'rb') as tmp_rd:
47        dependency_data = tmp_rd.read().decode('utf-8')
48    finally:
49      if os.path.exists(tmp_path):
50        os.unlink(tmp_path)
51
52    with open(args.dependency_out, 'w', encoding='utf-8') as f:
53      f.write(args.descriptor_set_out + ":")
54      f.write(dependency_data)
55  else:
56    subprocess.check_call(sys.argv[1:])
57
58
59if __name__ == '__main__':
60  sys.exit(main())
61