From: Paul van Delst <Paul.vanDelst@...>
Date: 2006-12-29T10:45:10+09:00
Subject: Re: rubygems install problems (the old ubygems (LoadError) problem. Sigh).

Hi Eric,

Eric Hodel wrote:
> On Dec 28, 2006, at 16:30, Paul van Delst wrote:
> 
>> I just did a complete re-install of ruby 1.8.5-p12 and rubygems-0.9.0 
>> and I'm getting the old sawhorse error:
>>
>> ruby: no such file to load -- ubygems (LoadError)
>>
>> I've searched the newsgroup, but nothing seems to address the problem 
>> I'm having (I think). Here's what I did:
>>
>> 0) rm -fr'd my "ruby" and "rubygems" installation directories in my 
>> $HOME/local (I do not have root access to the computer in question). 
>> Also unset RUBYOPT.
>>
>> ruby install
>> ------------
>> 1) Installed ruby 1.8.5-p12. No problems
>> 2) Modified my login script with:
>>      export PATH=$PATH:${HOME}/local/ruby/bin
>>    ruby and irb run fine.
>>
>> rubygems install
>> ----------------
>> 3) Specified where I want gems to actually go,
>>      export GEM_HOME=${HOME}/local/rubygemrepository
>> 4) ruby setup.rb config --prefix=${HOME}/local/rubygems
> 
> This tells ruby to put ubygems.rb under ~/local/rubygems.
> 
>> 5) ruby setup.rb setup
>> 6) ruby setup.rb install
>>    ....
>>      Successfully built RubyGem
>>      Name: sources
>>      Version: 0.0.1
>>      File: sources-0.0.1.gem
> 
> This puts ubygems.rb under ~/local/rubygems.
> 
>> 7) In login script added
>>      export GEM_HOME=${HOME}/local/rubygemrepository
>>      export PATH=$PATH:${HOME}/local/rubygems/bin
>>    and
>>      export RUBYOPT="rubygems"
>>
>>
>> Now I want to install a gem (Bil Kleb's funit) and I did:
>>
>>    gem install funit
>>
>> and got the error:
>>
>>    ruby: no such file to load -- ubygems (LoadError)
>>
>> And, of course, ruby and irb no longer work either (same error).
> 
> ubygems.rb is not in your $LOAD_PATH for ruby.
> 
>> O.k., so what did I do wrong? *After* I installed rubygems I set the 
>> RUBYOPT envar. But, ruby can't seem to find anything rubygem related.
>>
>> Is there some other magical envar that I need to set so that ruby and 
>> rubygems play nice?
> 
> You probably want to add:
> 
> export RUBYLIB=${HOME}/local/rubygems

Well, I eventually figured out that I need
   export RUBYLIB=${HOME}/local/rubygems/lib/ruby/site_ruby/1.8

Just specifying ${HOME}/local/rubygems didn't work.

>> Or should I install rubygem "inside" my ruby install? In:
>>   ${HOME}/local/ruby/lib/ruby/site_ruby/1.8/i686-linux ?
>> or
>>   ${HOME}/local/ruby/lib/ruby/site_ruby
>> or
>>   ??
> 
> This is how rubygems is typically installed (by not supplying the 
> --prefix option in step 4).  But you do not have root access.  You just 
> needed to add rubygems to the $LOAD_PATH.

This is going to make your eyes roll, but how does one add a root subdirectory to 
LOAD_PATH so that ruby searches recursively down? The only way I can figure out how to 
modify LOAD_PATH is to list every specific directory via the RUBYLIB envar -- which is 
rather onerous.

An online search didn't reveal anything clever.

cheers,

paulv


-- 
Paul van Delst             Ride lots.
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