From: Vladsialv Tchernev <vladislav.tchernev@...>
Date: 2006-04-13T00:01:53+09:00
Subject: Using gems problem -- LoadError

Hello all,
I am a newbie with ruby and gems and I have this frustrating problem not being 
able to load any gem I install. I am running Ubuntu 5.10 and I have just 
installed ruby1.8 deb (1.8.4) and have compiled rubygems-0.8.11 without any 
problem. I am able to load rubygems (require 'rubygems') and I setup RUBYOPT 
var as advised in gems doc (export RUBYOPT=rubygems). However, when I try to 
load a gem ($ruby1.8 -e "require 'some_gem' ") I always get an error (This is 
for xml-simple gem:

/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:21:in `require__': no 
such file to load -- xml-simple (LoadError)
        from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require'
        from -e:1

I checked and it seems that rubygems creates a dir-y for every installed gem 
in /usr/lib/ruby/gems/1.8/gems/, but this dir-y is not in the load path:
$ ruby1.8 -e "p $:"
["/usr/local/lib/site_ruby/1.8", "/usr/local/lib/site_ruby/1.8/i486-linux", 
"/usr/local/lib/site_ruby/1.8/i386-linux", "/usr/local/lib/site_ruby", 
"/usr/lib/ruby/1.8", "/usr/lib/ruby/1.8/i486-linux", 
"/usr/lib/ruby/1.8/i386-linux", "."]

... in the other hand rubygems has been installed 
in /usr/local/lib/site_ruby/1.8/

$ ls -l /usr/local/lib/site_ruby/1.8
gemconfigure.rb
i486-linux
rubygems
rubygems.rb
ubygems.rb

So at this point I am confused ... Could someone help me understand what I am 
missing here or point me to a doc or howto

Cheers
Vlad