setup

# File lib/irb/init.rb, line 16
  def IRB.setup(ap_path, argv: ::ARGV)
    IRB.init_config(ap_path)
    IRB.init_error
    IRB.parse_opts(argv: argv)
    IRB.run_config
    IRB.load_modules

    unless @CONF[:PROMPT][@CONF[:PROMPT_MODE]]
      IRB.fail(UndefinedPromptMode, @CONF[:PROMPT_MODE])
    end
  end