From: Eric Hodel <drbrain@...7.net>
Date: 2006-12-29T09:50:27+09:00
Subject: Re: rubygems install problems (the old ubygems (LoadError) problem. Sigh).

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

> 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.

> I followed the notes I made last time I did this[*] and it worked  
> then, so I've screwed something up somewhere; I just don't know what.

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net

I LIT YOUR GEM ON FIRE!