1#!/usr/bin/python
2
3"""Parse and check syntax errors of a given OWNERS file."""
4
5import argparse
6import re
7import sys
8import urllib2
9
10parser = argparse.ArgumentParser(description='Check OWNERS file syntax')
11parser.add_argument('-v', '--verbose', dest='verbose',
12                    action='store_true', default=False,
13                    help='Verbose output to debug')
14parser.add_argument('-c', '--check_address', dest='check_address',
15                    action='store_true', default=False,
16                    help='Check email addresses')
17parser.add_argument(dest='owners', metavar='OWNERS', nargs='+',
18                    help='Path to OWNERS file')
19args = parser.parse_args()
20
21gerrit_server = 'https://android-review.googlesource.com'
22checked_addresses = {}
23
24
25def echo(msg):
26  if args.verbose:
27    print msg
28
29
30def find_address(address):
31  if address not in checked_addresses:
32    request = gerrit_server + '/accounts/?suggest&q=' + address
33    echo('Checking email address: ' + address)
34    result = urllib2.urlopen(request).read()
35    expected = '"email": "' + address + '"'
36    checked_addresses[address] = (result.find(expected) >= 0)
37  return checked_addresses[address]
38
39
40def main():
41  # One regular expression to check all valid lines.
42  noparent = 'set +noparent'
43  email = '([^@ ]+@[^ @]+|\\*)'
44  directive = '(%s|%s)' % (email, noparent)
45  glob = '[a-zA-Z0-9_\\.\\-\\*\\?]+'
46  perfile = 'per-file +' + glob + ' *= *' + directive
47  pats = '(|%s|%s|%s)$' % (noparent, email, perfile)
48  patterns = re.compile(pats)
49
50  # One pattern to capture email address.
51  email_address = '.*(@| |=|^)([^@ =]+@[^ @]+)'
52  address_pattern = re.compile(email_address)
53
54  error = 0
55  for fname in args.owners:
56    echo('Checking file: ' + fname)
57    num = 0
58    for line in open(fname, 'r'):
59      num += 1
60      stripped_line = re.sub('#.*$', '', line).strip()
61      if not patterns.match(stripped_line):
62        error = 1
63        print('%s:%d: ERROR: unknown line [%s]'
64              % (fname, num, line.strip()))
65      elif args.check_address and address_pattern.match(stripped_line):
66        address = address_pattern.match(stripped_line).group(2)
67        if find_address(address):
68          echo('Found email address: ' + address)
69        else:
70          error = 1
71          print('%s:%d: ERROR: unknown email address: %s'
72                % (fname, num, address))
73  sys.exit(error)
74
75if __name__ == '__main__':
76  main()
77