Ruby 交互式 shell 命令 [英] Ruby interactive shell commands

问题描述

我想制作一个从 shell 执行命令的 ruby​​ shell 脚本.当 shell 命令需要用户的回答时会发生什么?

I want to make a ruby shell script that executes command from shell. What happens when the shell command needs the answer from a user?

例如，创建一个新的播放框架应用程序:

For example, creating a new play framework application:

play new calimero

~        _            _ 
~  _ __ | | __ _ _  _| |
~ | '_ \| |/ _' | || |_|
~ |  __/|_|\____|\__ (_)
~ |_|            |__/   
~
~ play! 1.2.7.2, http://www.playframework.org
~

~ The new application will be created in /home/anquegi/src/11paths/buildsdeb/toni_build/devops-tools/packaging/packwithruby/calimero
~ What is the application name? [calimero] ~   <=== here asks to the user

使用 ruby​​ shell 脚本，我想向用户提示并获取它，ruby 脚本等待它，我按 Enter，它就可以工作了.

With ruby shell script, I want to prompt this to the user and get it, the ruby script waits for that, I press enter, and it works.

value = %x(play new calimero)

等到用户点击介绍.我应该如何管理这个?我应该在提出问题之前打印问题吗?

waits until the user clicks intro. How I should manage this? Should I print the question before it is made?

推荐答案

原文:https://stackoverflow.com/a/6488335/2724079

这也可以通过 IO.expect 来实现

This can also be accomplished with IO.expect

require 'pty'
require 'expect'

PTY.spawn("play new calimero") do |reader, writer|
  reader.expect(/What is the application name/)
  writer.puts("\n")
end

这会等待生成的进程显示应用程序名称是什么"，并且当它看到打印定义的字符串(新行)时.

This waits for the spawned process to display "What is the application name" and when it sees that prints a defined string (new line).

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