There's also gem list -d gemname
$ gem list -d rails
*** LOCAL GEMS ***
rails (2.1.2, 2.1.0, 2.0.2, 1.2.6, 1.2.5, 1.2.3)
Author: David Heinemeier Hansson
Rubyforge:
http://rubyforge.org/projects/rails
Homepage:
http://www.rubyonrails.org
Installed at (2.1.2): /Library/Ruby/Gems/1.8
(2.1.0): /Library/Ruby/Gems/1.8
(2.0.2): /Library/Ruby/Gems/1.8
(1.2.6): /System/Library/Frameworks/Ruby.framework/
Versions/1.8/usr/lib/ruby/gems/1.8
(1.2.5): /Library/Ruby/Gems/1.8
(1.2.3): /System/Library/Frameworks/Ruby.framework/
Versions/1.8/usr/lib/ruby/gems/1.8
Web-application framework with template engine, control-flow layer,
and ORM.
So if you're looking to know where a particular version of a gem is
installed, it can be better than gem env:
$ gem env
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.1
- RUBY VERSION: 1.8.6 (2008-03-03 patchlevel 114) [universal-
darwin9.0]
- INSTALLATION DIRECTORY: /Library/Ruby/Gems/1.8
- RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/
Versions/1.8/usr/bin/ruby
- EXECUTABLE DIRECTORY: /usr/bin
- RUBYGEMS PLATFORMS:
- ruby
- universal-darwin-9
- GEM PATHS:
- /Library/Ruby/Gems/1.8
- /Users/rab/.gem/ruby/1.8
- /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/
ruby/gems/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
-
http://gems.rubyforge.org/
Hopefully, this gives you much more information that you needed ;-)
-Rob
Rob Biedenharn
http://agileconsultingllc.com
(e-mail address removed)