What is best way to debug Shoes applications?

Question

Shoes has some built in dump commands (Shoes.debug), but are there other tools that can debug the code without injecting debug messages throughout? Something like gdb would be great.

Yester

Answer 1

You can also use Shoes.show_log to automatically open a debug console.

Agulhas

"puts" (and "p") messages should appear in stdout in the terminal window from which you launched the shoes application. This is working with Shoes 4.0.0.pre5 running on jruby 9.1.0.0 - but I can't speak for earlier versions of Shoes. – Demasculinize

Answer 2

The shoes console. Press Alt+/ (or apple+/ on a mac) to see the stack trace of your application.

Kelbee

Answer 3

Note that if you use Alt + / you'll have to run that "before" starting the app

Mb

Answer 4

Have you looked at the ruby-debug gem?

% sudo gem install ruby-debug

The rdebug executable gives you a similar interface to gdb (breakpoint setting, etc). You just simply execute your script with rdebug instead of ruby.

You can also do something like this to avoid manually setting breakpoints:

class Foo
  require 'ruby-debug'
  def some_method_somewhere
    debugger # acts like a breakpoint is set at this point
  end
end

Here's a tutorial on ruby-debug: http://www.datanoise.com/articles/2006/7/12/tutorial-on-ruby-debug

Sulfite

How would you do this in Shoes? There's no terminal. – Lamere

This is useful debugging info, but its not clear how to apply to Shoes. – Unspotted

Answer 5

I was a bit confused about the Apple-/ (or Alt-/) bit mentioned here. What I ended up doing was running ./shoes with no arguments, which popped up the console, then started my app with ./shoes my_app.rb.

Lunar