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Gems won't load

• Edit

Corey

12 May, 2010 12:55 AM

I've installed the development version of Crunchbang, a linux distro based off Debian. I got Ruby and Rubygems installed, but I can't get the gems I've installed to load. Here is a command-line session:

# ruby -v
ruby 1.9.1p378 (2010-01-10 revision 26273) [i486-linux]

# gem env
RubyGems Environment:  
  - RUBYGEMS VERSION: 1.3.6  
  - RUBY VERSION: 1.9.1 (2010-01-10 patchlevel 378) [i486-linux]  
  - INSTALLATION DIRECTORY: /usr/lib/ruby1.9.1/gems/1.9.1  
  - RUBY EXECUTABLE: /usr/bin/ruby1.9.1  
  - EXECUTABLE DIRECTORY: /usr/bin  
  - RUBYGEMS PLATFORMS:  
    - ruby  
    - x86-linux  
  - GEM PATHS:  
     - /usr/lib/ruby1.9.1/gems/1.9.1  
     - /home/corey/.gem/ruby/1.9.1  
  - GEM CONFIGURATION:  
     - :update_sources => true  
     - :verbose => true  
     - :benchmark => false  
     - :backtrace => false  
     - :bulk_threshold => 1000  
  - REMOTE SOURCES:  
     - http://rubygems.org/  

# echo $PATH
/home/corey/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/home/corey/.gem/ruby/1.9.1:/usr/lib/ruby1.9.1/gems/1.9.1  

# gem list -d nokogiri

`*** LOCAL GEMS ***`  

nokogiri (1.4.1)  
    Authors: Aaron Patterson, Mike Dalessio  
    Rubyforge: http://rubyforge.org/projects/nokogiri  
    Homepage: http://nokogiri.org  
    Installed at: /usr/lib/ruby1.9.1/gems/1.9.1  
    Nokogiri (鋸) is an HTML, XML, SAX, and Reader parser  

# ruby -r rubygems -e "require 'nokogiri'"
-e:1:in `require': no such file to load -- nokogiri (LoadError)  
from -e:1:in `<main>'

I've encountered similar problems on Ubuntu before, but they were easy to fix. I can't figure out what's wrong in this particular case, and Google didn't seem to know either. Any help would be greatly appreciated!

1. Support Staff 1 Posted by Nick Quaranto on 12 May, 2010 04:17 AM

   

   That's definitely wacky.... what happens if you just launch irb and do

   require 'rubygems'
   require 'nokogiri'
   

   The same? Maybe show us the output of require 'pp'; pp $LOAD_PATH after requiring RubyGems too.

   • Edit

2. 2 Posted by Corey on 12 May, 2010 12:11 PM

   

   In that case, the required path is absent. I'm confused. IRB doesn't read the PATH when it starts?

   irb(main):001:0> require 'rubygems' 
   => true
   irb(main):002:0> require 'nokogiri'
   LoadError: no such file to load -- nokogiri
     from (irb):2:in `require'
     from (irb):2
     from /usr/bin/irb:12:in `<main>'
   irb(main):003:0> require 'pp'
   => true
   irb(main):004:0> pp $LOAD_PATH
   ["/usr/local/lib/site_ruby/1.9.1",
    "/usr/local/lib/site_ruby/1.9.1/i486-linux",
    "/usr/local/lib/site_ruby",
    "/usr/lib/ruby/vendor_ruby/1.9.1",
    "/usr/lib/ruby/vendor_ruby/1.9.1/i486-linux",
    "/usr/lib/ruby/vendor_ruby",
    "/usr/lib/ruby/1.9.1",
    "/usr/lib/ruby/1.9.1/i486-linux",
    "."]
   => nil
   

   • Edit

3. Support Staff 3 Posted by Eric Hodel on 12 May, 2010 06:06 PM

   

   "Based off Debian" is the problem. Ruby 1.9.1 ships with RubyGems which provides an alternative to RubyGems rubygems/custom_require.rb which Debian has removed.

   Since RubyGems expects that alternative to exist custom_require won't be loaded on 1.9.1. I'm not sure what the official Debian solution to this problem is, but installing ruby from source will fix it.

   • Edit

4. Nick Quaranto closed this discussion on 17 Jul, 2010 08:30 PM.