# File lib/rails-installer.rb, line 637
  def execute_command(*args)
    if args.size < 2
      display_help
      exit(1)
    end
    
    command_class = Command.commands[args.first]
    
    if command_class
      command_class.command(self,*(args[2..-1]))
    else
      display_help
      exit(1)
    end
  end