1#!/usr/bin/env python
2#
3# Copyright (C) 2019 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16#
17"""
18Merges input notice files to the output file while ignoring duplicated files
19This script shouldn't be confused with build/soong/scripts/generate-notice-files.py
20which is responsible for creating the final notice file for all artifacts
21installed. This script has rather limited scope; it is meant to create a merged
22notice file for a set of modules that are packaged together, e.g. in an APEX.
23The merged notice file does not reveal the individual files in the package.
24"""
25
26import sys
27import argparse
28
29def get_args():
30  parser = argparse.ArgumentParser(description='Merge notice files.')
31  parser.add_argument('--output', help='output file path.')
32  parser.add_argument('inputs', metavar='INPUT', nargs='+',
33                      help='input notice file')
34  return parser.parse_args()
35
36def main(argv):
37  args = get_args()
38
39  processed = set()
40  with open(args.output, 'w+') as output:
41    for input in args.inputs:
42      with open(input, 'r') as f:
43        data = f.read().strip()
44        if data not in processed:
45          processed.add(data)
46          output.write('%s\n\n' % data)
47
48if __name__ == '__main__':
49  main(sys.argv)
50