1#!/usr/bin/env python3
2#
3# Copyright 2018, 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
17import argparse
18import subprocess
19import sys
20import shlex
21
22def main():
23  parser = argparse.ArgumentParser(
24      description='Runs a command while collecting logcat in the background')
25  parser.add_argument('--output', '-o',
26                      type=lambda f: open(f,'w'),
27                      required=True,
28                      action='store',
29                      help='File to store the logcat to. Will be created if not already existing')
30  parser.add_argument('--logcat-invoke',
31                      action='store',
32                      default='adb logcat',
33                      help="""Command to run to retrieve logcat data. Defaults to 'adb logcat'.
34                      It will be run in the background and killed by SIGTERM when the 'command'
35                      finishes.""")
36  parser.add_argument('command',
37                      action='store',
38                      nargs=argparse.REMAINDER,
39                      help='The command to run with logcat in the background.')
40  args = parser.parse_args()
41  if len(args.command) == 0:
42    print("Must have some command to run.", file=sys.stderr)
43    parser.print_help(file=sys.stderr)
44    return 1
45  # Send all output from logcat to the file.
46  with subprocess.Popen(shlex.split(args.logcat_invoke),
47                                    stdout=args.output,
48                                    stderr=subprocess.STDOUT,
49                                    shell=False,
50                                    universal_newlines=True) as logcat_proc:
51    # Let the run-test-proc inherit our stdout FDs
52    with subprocess.Popen(shlex.split(args.command[0]) if len(args.command) == 1 else args.command,
53                          stdout=None,
54                          stderr=None,
55                          shell=False) as run_test_proc:
56      # Don't actually do anything. Just let the run-test proc finish.
57      pass
58    # Send SIGTERM to the logcat process.
59    logcat_proc.kill()
60  return 0
61
62if __name__ == '__main__':
63  sys.exit(main())
64
65