From: Eric Hodel <drbrain@...7.net>
Date: 2009-11-24T07:38:40+09:00
Subject: Re: RubyGems current load paths

On Nov 20, 2009, at 08:40, Intransition wrote:
> I need to get a list of the "current" gem load paths. I learned that I
> can get a list of all the latest load paths via:
>
>  Gem.latest_load_paths
>
> which is great. But lets say I specify an older version of a lib, eg:
>
>  gem "RubyInline", "= 3.7.0"
>
> Gem.latest_load_paths doesn't change. How can I get a list of latest
> load paths but adjusted to reflect any specified gem versions?

Gem.latest_load_paths works for all installed gems, even if they're  
not activated.  You'll need to use Gem::Specification#full_gem_path  
and Gem::Specification#require_path.

Needing to know where the gem lives is a sign that you're doing  
something wrong though.