    # File lib/yard/cli/command.rb, line 23
          def common_options(opts)
            opts.separator ""
            opts.separator "Other options:"
            opts.on('-e', '--load FILE', 'A Ruby script to load before running command.') do |file|
              load_script(file)
            end
            opts.on('--plugin PLUGIN', 'Load a YARD plugin (gem with `yard-\' prefix)') do |name|
              # Not actually necessary to load here, this is done at boot in YARD::Config.load_plugins
              # YARD::Config.load_plugin(name)
            end
            opts.on('--legacy', 'Use old style Ruby parser and handlers. ',
                                '  Always on in 1.8.x.') do
              YARD::Parser::SourceParser.parser_type = :ruby18
            end
            opts.on_tail('-q', '--quiet', 'Show no warnings.') { log.level = Logger::ERROR }
            opts.on_tail('--verbose', 'Show more information.') { log.level = Logger::INFO }
            opts.on_tail('--debug', 'Show debugging information.') { log.level = Logger::DEBUG }
            opts.on_tail('--backtrace', 'Show stack traces') { log.show_backtraces = true }
            opts.on_tail('-v', '--version', 'Show version.') { puts "yard #{YARD::VERSION}"; exit }
            opts.on_tail('-h', '--help', 'Show this help.')  { puts opts; exit }
          end