class RuboCop::Options

def parse(command_line_args)
  args = args_from_file.concat(args_from_env).concat(command_line_args)
  define_options.parse!(args)
  @validator.validate_compatibility
  if @options[:stdin]
    # The parser will put the file name given after --stdin into
    # @options[:stdin]. If it did, then the args array should be empty.
    raise OptionArgumentError, E_STDIN_NO_PATH if args.any?
    # We want the STDIN contents in @options[:stdin] and the file name in
    # args to simplify the rest of the processing.
    args = [@options[:stdin]]
    @options[:stdin] = $stdin.binmode.read
  end
  [@options, args]
end