Merge "Handle warning lines from RBE" am: 799e26e6

  warning_pattern = re.compile('^/[^ ]*/[^ ]*: warning: .*')

  count = 0

  for line in buildlog:

    if warning_pattern.match(line):

    # We want to find android_root of a local build machine.

    # Do not use RBE warning lines, which has '/b/f/w/' path prefix.

    # Do not use /tmp/ file warnings.

    if warning_pattern.match(line) and (

        '/b/f/w' not in line and not line.startswith('/tmp/')):

      warning_lines.append(line)

      count += 1

      if count > 9999:

  architecture = 'unknown'

  # only handle warning lines of format 'file_path:line_no:col_no: warning: ...'

  # Bug: http://198657613, This might need change to handle RBE output.

  chrome_warning_pattern = r'^[^ ]*/[^ ]*:[0-9]+:[0-9]+: warning: .*'

  warning_pattern = re.compile(chrome_warning_pattern)

  platform_version = 'unknown'

  target_product = 'unknown'

  target_variant = 'unknown'

  build_id = 'unknown'

  use_rbe = False

  android_root = find_android_root(infile)

  infile.seek(0)

  warning_without_file = re.compile('^warning: .*')

  rustc_file_position = re.compile('^[ ]+--> [^ ]*/[^ ]*:[0-9]+:[0-9]+')

  # If RBE was used, try to reclaim some warning lines mixed with some

  # leading chars from other concurrent job's stderr output .

  # The leading characters can be any character, including digits and spaces.

  # It's impossible to correctly identify the starting point of the source

  # file path without the file directory name knowledge.

  # Here we can only be sure to recover lines containing "/b/f/w/".

  rbe_warning_pattern = re.compile('.*/b/f/w/[^ ]*: warning: .*')

   # Collect all unique warning lines

  # Remove the duplicated warnings save ~8% of time when parsing

  # one typical build log than before

          prev_warning, flags, android_root, unique_warnings)

      prev_warning = ''

    if use_rbe and rbe_warning_pattern.match(line):

      cleaned_up_line = re.sub('.*/b/f/w/', '', line)

      unique_warnings = add_normalized_line_to_warnings(

          cleaned_up_line, flags, android_root, unique_warnings)

      continue

    if warning_pattern.match(line):

      if warning_without_file.match(line):

        # save this line and combine it with the next line

      result = re.search('(?<=^PLATFORM_VERSION=).*', line)

      if result is not None:

        platform_version = result.group(0)

        continue

      result = re.search('(?<=^TARGET_PRODUCT=).*', line)

      if result is not None:

        target_product = result.group(0)

        continue

      result = re.search('(?<=^TARGET_BUILD_VARIANT=).*', line)

      if result is not None:

        target_variant = result.group(0)

        continue

      result = re.search('(?<=^BUILD_ID=).*', line)

      if result is not None:

        build_id = result.group(0)

        continue

      result = re.search('(?<=^TOP=).*', line)

      if result is not None:

        android_root = result.group(1)

        continue

      if re.search('USE_RBE=', line) is not None:

        use_rbe = True

        continue

  if android_root:

    new_unique_warnings = dict()

          warning_line, flags, android_root)

    unique_warnings = new_unique_warnings

  header_str = '%s - %s - %s' % (platform_version, target_product,

                                 target_variant)

  header_str = '%s - %s - %s (%s)' % (

      platform_version, target_product, target_variant, build_id)

  return unique_warnings, header_str