Need help invoking debug

Ruby
1

Newbie here… I’m trying to run a ruby program in debug mode. I used
the following command:

ruby -r debug debugtest.rb

The response I get is this:

Debug.rb
Emacs support available.

C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:require
‘rubygems’
(rdb:1)

No typos… does it have something to do with the reference to ubygems.
I haven’t played around with the installation files so I don’t
understand how a file could be mis-named, but who knows. And looking at
the folder shows both rubygems.rb and ubygems.rb.

Or is it referring to something else? I don’t get it. I’m working my
way through a beginners book but seem to be hung-up on this example.

Thanks in advance…

2

On Sat, Oct 10, 2009 at 5:13 AM, Shawn H. [email protected] wrote:

C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:require
‘rubygems’
(rdb:1)

No typos… does it have something to do with the reference to ubygems.
I haven’t played around with the installation files so I don’t
understand how a file could be mis-named, but who knows. And looking at
the folder shows both rubygems.rb and ubygems.rb.

Or is it referring to something else? I don’t get it. I’m working my
way through a beginners book but seem to be hung-up on this example.

Did you try looking at what’s inside ubygems.rb

This file allows for the running of rubygems with a nice

command line look-and-feel: ruby -rubygems foo.rb

#–

Copyright 2006 by Chad F., Rich Kilmer, Jim W. and others.

All rights reserved.

See LICENSE.txt for permissions.

#++

require ‘rubygems’

–
Rick DeNatale

Blog: http://talklikeaduck.denhaven2.com/
Twitter: http://twitter.com/RickDeNatale
WWR: http://www.workingwithrails.com/person/9021-rick-denatale
LinkedIn: http://www.linkedin.com/in/rickdenatale

3

C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:require
‘rubygems’
(rdb:1)

No typos… does it have something to do with the reference to ubygems.
I haven’t played around with the installation files so I don’t
understand how a file could be mis-named, but who knows. And looking at
the folder shows both rubygems.rb and ubygems.rb.

What’s happening is probably that you have RUBYOPT=-rubygems

which is a shortcut way to require rubygems, sometimes setup by the one
click installer. So when you ruby ruby -r debug some_file

it ends up running a require BEFORE it runs that file, and,
conveniently, brings you to a debug prompt in the pre-file file.

To get around it:
gem install ruby-debug
then within debugtest.rb
require ‘ruby-debug’
debugger
Cheers!
-r

4

What’s happening is probably that you have RUBYOPT=-rubygems

which is a shortcut way to require rubygems, sometimes setup by the one
click installer. So when you ruby ruby -r debug some_file

it ends up running a require BEFORE it runs that file, and,
conveniently, brings you to a debug prompt in the pre-file file.

To get around it:
gem install ruby-debug
then within debugtest.rb
require ‘ruby-debug’
debugger
Cheers!
-r

Thanks for the advice guys… RP I did what you suggested and it seemed
to work, although some of the commands don’t seem to work (following the
example in the book). But I was able to list and step through the
code… maybe a different version of ruby-debug from that used in the
book.

I’m moving on… I figure I can come back to this if it proves to be
important when I have some more knowledge. Thanks again for the help.