# File rbot/plugins.rb, line 113
    def scan
      dirs = Array.new
      dirs << File.dirname(__FILE__) + "/plugins"
      dirs += @dirs
      dirs.each {|dir|
        if(FileTest.directory?(dir))
          d = Dir.new(dir)
          d.each {|file|
            next if(file =~ /^\./)
            next unless(file =~ /\.rb$/)
            @tmpfilename = "#{dir}/#{file}"

            # create a new, anonymous module to "house" the plugin
            plugin_module = Module.new
            
            begin
              plugin_string = IO.readlines(@tmpfilename).join("")
              plugin_module.module_eval(plugin_string)
            rescue StandardError, NameError, LoadError, SyntaxError => err
              puts "plugin #{@tmpfilename} load failed: " + err
              puts err.backtrace.join("\n")
            end
          }
        end
      }
    end