handle_options

# File lib/rake/application.rb, line 422
    def handle_options
      options.rakelib = ['rakelib']

      OptionParser.new do |opts|
        opts.banner = "rake [-f rakefile] {options} targets..."
        opts.separator ""
        opts.separator "Options are ..."

        opts.on_tail("-h", "--help", "-H", "Display this help message.") do
          puts opts
          exit
        end

        standard_rake_options.each { |args| opts.on(*args) }
        opts.environment('RAKEOPT')
      end.parse!

      # If class namespaces are requested, set the global options
      # according to the values in the options structure.
      if options.classic_namespace
        $show_tasks = options.show_tasks
        $show_prereqs = options.show_prereqs
        $trace = options.trace
        $dryrun = options.dryrun
        $silent = options.silent
      end
    end