如何从正在运行的脚本中切换到IRB提示符?

Can I drop to an IRB prompt from a running Ruby script?

我可以从运行的Ruby脚本中切换到IRB提示符吗?

I want to run a script, but then have it give me an IRB prompt at a point in the program with the current state of the program, but not just by running rdebug and having a breakpoint.

我想运行一个脚本，但是让它在程序的某个点上给我一个IRB提示符，提示符是程序的当前状态，而不是仅仅通过运行rdebug和断点。

6 个解决方案

#1

you can use ruby-debug to get access to irb

您可以使用ruby-debug来访问irb

require 'rubygems'
require 'ruby-debug'
x = 23
puts "welcome"
debugger
puts "end"

when program reaches debugger you will get access to irb.

当程序到达调试器时，您将访问irb。

#2

Pry (an IRB alternative) also lets you do this, in fact it was designed from the ground up for exactly this use case :)

Pry (IRB的一种替代方案)也允许您这样做，事实上它是为这个用例从头开始设计的:)

It's as easy as putting binding.pry at the point you want to start the session:

它和装订一样简单。在你想要开始会议的时候:

require 'pry'
x = 10
binding.pry

And inside the session:

并在会话:

pry(main)> puts x
=> 10

Check out the website: http://pry.github.com

看看这个网站:http://pry.github.com

Pry let's you:

撬让你:

drop into a session at any point in your code
在您的代码中的任何位置插入会话
view method source code
视图方法的源代码
view method documentation (not using RI so you dont have to pre-generate it)
查看方法文档(不使用RI，所以您不必预先生成它)
pop in and out of different contexts
在不同的上下文中弹出
syntax highlighting
语法高亮显示
gist integration
依据集成
view and replay history
视图和重演历史
open editors to edit methods using edit obj.my_method syntax
打开编辑器，使用edit obj编辑方法。my_method语法

A tonne more great and original features

更多伟大和原创的特征

#3

apparently it requires a chunk of code to drop into irb.

显然，它需要一段代码才能进入irb。

Here's the link (seems to work well).

这是链接(看起来效果不错)。

http://jameskilton.com/2009/04/02/embedding-irb-into-your-ruby-application


require 'irb'

module IRB
  def self.start_session(binding) # call this method to drop into irb
    unless @__initialized
      args = ARGV
      ARGV.replace(ARGV.dup)
      IRB.setup(nil)
      ARGV.replace(args)
      @__initialized = true
    end

    workspace = WorkSpace.new(binding)

    irb = Irb.new(workspace)

    @CONF[:IRB_RC].call(irb.context) if @CONF[:IRB_RC]
    @CONF[:MAIN_CONTEXT] = irb.context

    catch(:IRB_EXIT) do
      irb.eval_input
    end
  end
end

#4

This feature is available from Ruby 2.4. You can just use binding.irb

这个特性可以从Ruby 2.4中获得。你可以用binding。irb

E.g.

如。

require 'irb'
a = 10
binding.irb
puts a

If you run above code, you will get irb console, so that you can inspect values of local variables and anything else that is in scope.

如果您运行上述代码，您将获得irb控制台，以便您可以检查本地变量的值和范围内的任何其他值。

Source: http://blog.redpanthers.co/new-binding-irb-introduced-ruby-2-4/

来源:http://blog.redpanthers.co/new-binding-irb-introduced-ruby-2-4/

Ruby commit: https://github.com/ruby/ruby/commit/493e48897421d176a8faf0f0820323d79ecdf94a

Ruby提交:https://github.com/ruby/ruby/commit/493e48897421d176a8faf0f0820323d79ecdf94a

#5

Just add this line to where you want the breakpoint:

只需在需要断点的地方添加这一行:

require 'ruby-debug';debugger

需要“ruby-debug”;调试器

but i suggest use pry instead of irb, which is super handy, insert the following line instead:

但是我建议用pry代替irb，这是非常方便的，插入下面的一行代替:

require 'pry'; binding.pry

需要“撬”;binding.pry

#6

I'm quite late to the game but if you're loading a script from within irb/pry already, a simple raise also works to pop you back out to the irb/pry prompt. I use this quite often when writing one off scripts within the rails console.

我已经很晚了，但是如果你已经在irb/pry中加载了一个脚本，一个简单的raise也可以让你回到irb/pry提示符。当我在rails控制台中编写一个脱机脚本时，我经常使用这种方法。

#1