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1#!/usr/bin/env python
2# Copyright 2017 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6import argparse
7import json
8import shutil
9import sys
10
11
12def noop_merge(output_json, jsons_to_merge):
13  """Use the first supplied JSON as the output JSON.
14
15  Primarily intended for unsharded tasks.
16
17  Args:
18    output_json: A path to a JSON file to which the results should be written.
19    jsons_to_merge: A list of paths to JSON files.
20  """
21  if len(jsons_to_merge) > 1:
22    print >> sys.stderr, (
23        'Multiple JSONs provided: %s' % ','.join(jsons_to_merge))
24    return 1
25  if jsons_to_merge:
26    shutil.copyfile(jsons_to_merge[0], output_json)
27  else:
28    with open(output_json, 'w') as f:
29      json.dump({}, f)
30  return 0
31
32
33def main(raw_args):
34  parser = argparse.ArgumentParser()
35  parser.add_argument('--build-properties', help=argparse.SUPPRESS)
36  parser.add_argument('--summary-json', help=argparse.SUPPRESS)
37  parser.add_argument('-o', '--output-json', required=True)
38  parser.add_argument('jsons_to_merge', nargs='*')
39
40  args = parser.parse_args(raw_args)
41
42  return noop_merge(args.output_json, args.jsons_to_merge)
43
44
45if __name__ == '__main__':
46  sys.exit(main(sys.argv[1:]))
47