    # File lib/chef/shef.rb, line 99
      def self.configure_irb
        irb_conf[:HISTORY_FILE] = "~/.shef_history"
        irb_conf[:SAVE_HISTORY] = 1000

        irb_conf[:IRB_RC] = lambda do |conf|
          m = conf.main

          conf.prompt_c       = "chef#{leader(m)} > "
          conf.return_format  = " => %s \n"
          conf.prompt_i       = "chef#{leader(m)} > "
          conf.prompt_n       = "chef#{leader(m)} ?> "
          conf.prompt_s       = "chef#{leader(m)}%l> "
        end
      end