From: Aaron Patterson <aaron@...>
Date: 2009-10-09T03:28:38+09:00
Subject: Re: Difficulty updating Ruby Gems in a non-standard location

On Oct 8, 2009, at 10:53 AM, David Brodbeck wrote:

> I have Ruby Gems installed in a non-standard location.  Both  
> $GEM_PREFIX and $GEM_HOME are set.  I'm attempting to update from  
> 0.9.4 to 1.3.5, without success.
>
> First attempt:  I tried "gem update --system".  This didn't work  
> because it ignored $GEM_PREFIX and installed in the wrong location.
>
> Second attempt: I tried the instructions here: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/243916
>   This completely broke gem; every time I tried to do something with  
> it I got this error:
>   /opt/ruby-gems/bin/gem:14: undefined method `ruby_version' for  
> Gem:Module (NoMethodError)
>
> Third attempt: I restored my gem directory from backup and tried  
> "gem install rubygems-update && update_rubygems".  This gave the  
> following error:
>   Error: Cannot find RubyGems Update Path!
>
>   RubyGems has already been updated.
>   The rubygems-update gem may now be uninstalled.
>   E.g.    gem uninstall rubygems-update
>
> So, now I'm stumped.  How do I update Ruby Gems if it's not  
> installed in the standard location?

I would suggest downloading the tar.gz and running setup.rb (making  
sure GEM_PREFIX and GEM_HOME are set).  That might clear up your  
problems.

You can grab the tar.gz file here:

     http://rubyforge.org/frs/?group_id=126

---
Aaron Patterson
http://tenderlovemaking.com