From: Eric Hodel <drbrain@...7.net>
Date: 2009-03-05T09:41:00+09:00
Subject: Re: gem cleanup problem

On Mar 4, 2009, at 12:56, Tom Cloyd wrote:
> Eric Hodel wrote:
>>> $ sudo gem cleanup
>>> Cleaning up installed gems...
>>> Attempting to uninstall bones-2.3.1
>>> ERROR:  While executing gem ... (Gem::InstallError)
>>>  Unknown gem bones = 2.3.1
>>> tomc@tomc-desktop:~$
>>>
>>> I don't understand the problem here. Can anyone offer me a clue?
>>
>> gem cleanup doesn't handle multiple gem repos well yet, this may be  
>> your problem:
>>
>> $ gem list -d rails
>>
>> *** LOCAL GEMS ***
>>
>> rails (2.2.2, 1.2.6)
>>    Author: David Heinemeier Hansson
>>    Rubyforge: http://rubyforge.org/projects/rails
>>    Homepage: http://www.rubyonrails.org
>>    Installed at (2.2.2): /Library/Ruby/Gems/1.8
>>                 (1.2.6): /System/Library/Frameworks/Ruby.framework/ 
>> Versions/1.8/usr/lib/ruby/gems/1.8
>> [...]
>> $ sudo gem cleanup rails
>> Password:
>> Cleaning up installed gems...
>> :0:Warning: Gem::SourceIndex#search support for Regexp patterns is  
>> deprecated
>> Attempting to uninstall rails-1.2.6
>> ERROR:  While executing gem ... (Gem::InstallError)
>>    Unknown gem rails = 1.2.6
>> $
>>
>>
> Bingo. That's it. I have ruby 1.8.7 installed, and recently  
> installed 1.9 as well. It never occurred to me that Rubygems was  
> catching both installs, and that is clearly the case. Hadn't used  
> the 'gem list -d {}' command until I read your email. Problem  
> explained, if not solved. Interesting....

I forgot the workaround:

sudo sh -c 'GEM_PATH=`gem env home` gem cleanup'