From: cnjohnson <charles.johnson@...>
Date: 2009-01-01T06:30:45+09:00
Subject: Re: Problem with "gem cleanup" on OS X 10.5



Ken McDonald wrote:
> 
> When I try to execute 'sudo gem cleanup' on OS X 10.5, I get the  
> message:
> 
> Attempting to uninstall rails-1.2.6
> ERROR: While executing gem . . . (Gem:InstallError)
>      Unknown gem rails = 1.2.6
> 
> How can I fix this so gem cleanup will continue to completion?
> 

You can search for the offending gem with 

%gem list -d sqlite3 

On OS X you will get back something akin to 

*** LOCAL GEMS *** 

sqlite3-ruby (1.2.4, 1.2.1) 
    Author: Jamis Buck 
    Homepage: http://sqlite-ruby.rubyforge.org/sqlite3
    Installed at (1.2.4): /Library/Ruby/Gems/1.8 
                 (1.2.1):
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8 

    SQLite3/Ruby is a module to allow Ruby scripts to interface with a 
    SQLite3 database. 

You may now uninstall the offending gem with 

%gem uninstall --install-dir 
System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8
sqlite3 

So, in general 

gem list -d <gem-name> 

will get you the location of the gem, and 

gem uninstall --install-dir </install/directory> <gem-name> 

will uninstall the gem. 

HTH 

Charles
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