def check_pattern_matches()

in tools/automate/automate-git.py [0:0]

• 49 lines of code
• 17 McCabe index (conditional complexity)

def check_pattern_matches(output_file=None):
  """ Evaluate the Chromium checkout for pattern matches. """
  config = read_update_file()
  if config is None:
    msg("Skipping Chromium pattern matching.")
    return

  if 'patterns' in config:
    if output_file is None:
      fp = sys.stdout
    else:
      msg('Writing %s' % output_file)
      fp = open(output_file, 'w', encoding='utf-8')

    has_output = False
    for entry in config['patterns']:
      msg("Evaluating pattern: %s" % entry['pattern'])

      # Read patterns from a file to avoid formatting problems.
      pattern_handle, pattern_file = tempfile.mkstemp()
      os.write(pattern_handle, entry['pattern'])
      os.close(pattern_handle)

      cmd = '%s grep -n -f %s' % (git_exe, pattern_file)
      result = exec_cmd(cmd, chromium_src_dir)
      os.remove(pattern_file)

      if result['out'] != '':
        write_msg = True
        re_exclude = re.compile(
            entry['exclude_matches']) if 'exclude_matches' in entry else None

        for line in result['out'].split('\n'):
          line = line.strip()
          if len(line) == 0:
            continue
          skip = not re_exclude is None and re_exclude.match(line) != None
          if not skip:
            if write_msg:
              if has_output:
                write_fp(fp, '\n')
              write_fp(fp,
                       '!!!! WARNING: FOUND PATTERN: %s\n' % entry['pattern'])
              if 'message' in entry:
                write_fp(fp, entry['message'] + '\n')
              write_fp(fp, '\n')
              write_msg = False
            write_fp(fp, line + '\n')
            has_output = True

    if not output_file is None:
      if has_output:
        msg('ERROR Matches found. See %s for output.' % out_file)
      else:
        write_fp(fp, 'Good news! No matches.\n')
      fp.close()

    if has_output:
      # Don't continue when we know the build will be wrong.
      sys.exit(1)