def setup_options_parser
      @options_parser = OptionParser.new do |opts|
        opts.banner = "\nUsage: fission [options] COMMAND [arguments]"

        opts.on_head('-v', '--version', 'Output the version of fission') do
          ui.output VERSION
          exit 0
        end

        opts.on_head('-h', '--help', 'Displays this message') do
          show_all_help
          exit 0
        end
      end
    end
def setup_options_parser
      @options_parser = OptionParser.new do |opts|
        opts.banner = "\nUsage: fission [options] COMMAND [arguments]"

        opts.on_head('-v', '--version', 'Output the version of fission') do
          ui.output VERSION
          exit 0
        end

        opts.on_head('-h', '--help', 'Displays this message') do
          show_all_help
          exit 0
        end
      end
    end
Internal: Sets up the base option parser.

 Examples:

   @cli.setup_option_parser

 Returns nothing.  This will set the @option_parser instance variable.