From: Tomas Pospisek's Mailing Lists <tpo2@...>
Date: 2007-05-25T17:35:49+09:00
Subject: Re: Ruby - Debugging

On Fri, 25 May 2007, Alex Gutteridge wrote:

> On 25 May 2007, at 16:50, Tomas Pospisek's Mailing Lists wrote:
>
>> On Fri, 25 May 2007, Alex Gutteridge wrote:
>> 
>>> On 25 May 2007, at 15:42, Tomas Pospisek's Mailing Lists wrote:
>>> 
>>>> On Fri, 25 May 2007, Jorge Domenico Bucaran Romano wrote:
>>>>> C:\Users\jbucaran>ruby -rdebug c:\users\jbucaran\desktop\demo2.rb
>>>>> Debug.rb
>>>>> Emacs support available.
>>>>> C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:require
>>>>> 'rubygems'
>>>>> (rdb:1) b "c:\users\jbucaran\desktop\demo2.rb"
>>>>> C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:compile error
>>>>> C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10: unterminated
>>>>> string
>>>>> meets end of file
>>>>> (rdb:1)
>>>>> I am sorry to bother like this, but is there any way I could get serious
>>>>> documentation on how to use this, a good tutorial, maybe you can help me
>>>>> here with a fine start. Please I can't believe it is so hard to do this.
>>>> Did you ask Google?
>>>> In your example above a file named "ubygems" is being parsed. Looks like 
>>>> non-sense to me?
>>>> *t
>>> 
>>> ubygems.rb is the way rubygems is loaded when you run:
>>> 
>>> ruby -rubygems
>> 
>> Where "-rXYZ" means: "Please ruby, load the library XYZ first please, 
>> before loading the actual program". And as can be seen above, ruby does 
>> actually find a file/library named "ubygems" at
>> "C:/Program Files/Ruby/lib/ruby/site_ruby/1.8/ubygems.rb" which doesn't 
>> make any sense to me because (AFAIK) there doesn't exist and library named 
>> "ubygems" unless Jorge did something strange and placed something there.
>> 
>> Or am I misstaken?
>> *t
>
> ubygems *is* rubygems. This is getting off-topic, but ubygems.rb is the 
> reason you can write the aesthetically pleasing:
>
> ruby -rubygems foo.rb
>
> As well as:
>
> ruby -rrubygems foo.rb
>
> Note the double rr in the second one. Every installation of rubygems includes 
> ubygems.rb as far as I know. Try "locate '/ubygems.rb'" on your system.

Ah, you're right, somehow I had missed that the last time I had run
locate '/ubygems.rb.

Thanks for the enlightening,
*t

--
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   Tomas Pospisek
   http://sourcepole.com -  Linux & Open Source Solutions
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