instance method options

# File railties/lib/commands/plugin.rb, line 683
    def options
      OptionParser.new do |o|
        o.set_summary_indent('  ')
        o.banner =    "Usage: #{@base_command.script_name} discover URI [URI [URI]...]"
        o.define_head "Discover repositories referenced on a page."
        o.separator   ""        
        o.separator   "Options:"
        o.separator   ""
        o.on(         "-l", "--list", 
                      "List but don't prompt or add discovered repositories.") { |list| @list, @prompt = list, !@list }
        o.on(         "-n", "--no-prompt", 
                      "Add all new repositories without prompting.") { |v| @prompt = !v }
      end
    end