Merge "Handle rustc warning messages."

     'patterns': [r".*: .+\[clang-analyzer-.+\]$",

                  r".*: Call Path : .+$"]},

    # rustc warnings

    {'category': 'rust', 'severity': Severity.HIGH,

     'description': 'Does not derive Copy',

     'patterns': [r".*: warning: .+ does not derive Copy"]},

    {'category': 'rust', 'severity': Severity.MEDIUM,

     'description': 'Deprecated range pattern',

     'patterns': [r".*: warning: .+ range patterns are deprecated"]},

    {'category': 'rust', 'severity': Severity.MEDIUM,

     'description': 'Deprecated missing explicit \'dyn\'',

     'patterns': [r".*: warning: .+ without an explicit `dyn` are deprecated"]},

    # catch-all for warnings this script doesn't know about yet

    {'category': 'C/C++', 'severity': Severity.UNKNOWN,

     'description': 'Unclassified/unrecognized warnings',

  global target_variant

  line_counter = 0

  # handle only warning messages with a file path

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

  # rustc warning messages have two lines that should be combined:

  #     warning: description

  #        --> file_path:line_number:column_number

  # Some warning messages have no file name:

  #     warning: macro replacement list ... [bugprone-macro-parentheses]

  # Some makefile warning messages have no line number:

  #     some/path/file.mk: warning: description

  # C/C++ compiler warning messages have line and column numbers:

  #     some/path/file.c:line_number:column_number: warning: description

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

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

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

  # Collect all warnings into the warning_lines set.

  warning_lines = set()

  prev_warning = ''

  for line in infile:

    if prev_warning:

      if rustc_file_position.match(line):

        # must be a rustc warning, combine 2 lines into one warning

        line = line.strip().replace('--> ', '') + ': ' + prev_warning

        warning_lines.add(normalize_warning_line(line))

        prev_warning = ''

        continue

      # add prev_warning, and then process the current line

      prev_warning = 'unknown_source_file: ' + prev_warning

      warning_lines.add(normalize_warning_line(prev_warning))

      prev_warning = ''

    if warning_pattern.match(line):

      line = normalize_warning_line(line)

      warning_lines.add(line)

    elif line_counter < 100:

      if warning_without_file.match(line):

        # save this line and combine it with the next line

        prev_warning = line

      else:

        warning_lines.add(normalize_warning_line(line))

      continue

    if line_counter < 100:

      # save a little bit of time by only doing this for the first few lines

      line_counter += 1

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