在Ruby中调试第三方宝石的最佳方式 [英] Best way to debug third-party gems in ruby

问题描述

由于ruby宝石中可能有很多 Ghost方法，所以我不认为通过静态读取它的源代码来研究ruby gem的内部机制是不错的。有没有办法将第三部分宝石的源文件附加到正在运行的ruby进程进行调试，以便我可以设置断点并查看事情的动态变化？

BTW，我试过通过点击require语句或第三部分gem的其他符号（ require'）的上下文菜单Go To-> Implementations，导航到RubyMine中第三部分gem的源文件watir'），没有成功。对于Ruby等动态打字语言的IDE来说，这是正常的吗？

Since there may be a lot of Ghost Methods inside a ruby gem, I don't think it is a good idea to study the inner mechanism of a ruby gem just by reading its source code statically. Is there a way to attach the source file of a third-part gem to a running ruby process for debugging so that I can set break point and see how things work dynamically ?
BTW,I've tried to navigate to the source file of a third-part gem in RubyMine by clicking on the context menu "Go To->Implementations" of the 'require' statement or other symbol of an third-part gem( require 'watir' for example ), without success. Is it normal for an IDE of a dynamic typing language such as Ruby to fail a symbol navigation?

推荐答案

我很想知道如果有一个更好的方式来做，但是我通常做的是：

I would love to know if there's a better way to do this, but how I usually do it is:

1. 将ruby-debug gem添加到Gemfile（或ruby-debug19如果你使用的是Ruby 1.9.2）


2. 通过执行 bundle show gemname 找到宝石。我在Mac上，所以我通常把它管理到pbcopy，所以它被复制到我的剪贴板。 bundle show rails | pbcopy


3. 在您最喜欢的编辑器中打开gem目录。 mvim / path / to / gem / directory


4. 浏览到要放置断点*的文件和行，并插入调试器


5. 重新加载页面，运行测试或做任何您将获得Gem文件执行


6. 当调试器执行停止时，您可以检查变量（ p variable_name ），并逐行移动 ruby​​ debugger命令。

1. Add the ruby-debug gem to your Gemfile (or ruby-debug19 if you're on Ruby 1.9.2)
2. Find the Gem by doing bundle show gemname. I'm on a Mac so I usually pipe this to pbcopy so it gets copied to my clipboard. bundle show rails | pbcopy
3. Open the gem directory in your favorite editor. mvim /path/to/gem/directory
4. Navigate to the file and line where you want to put the breakpoint* and insert debugger above the line in question.
5. Reload page, run test, or do whatever you would to get the Gem file to execute
6. When execution stops at debugger, you can inspect variables (p variable_name), and move line by line with the ruby debugger commands.

*知道放置断点可以对代码进行一些了解，但是您应该从lib / gemname.rb开始

*Knowing where to put the breakpoint can take some understanding of the code, but you should start in lib/gemname.rb

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