Try script\about 4
If you have Rails 1.0 or higher, you can run script\about script to find out which gems are being used in your app.
For example,
C:\dev\me\sandbox>ruby script\about
About your application's environment
Ruby version 1.8.2 (i386-mswin32)
RubyGems version 0.8.11
Rails version 1.0.0
Active Record version 1.13.2
Action Pack version 1.11.2
Action Web Service version 1.0.0
Action Mailer version 1.1.5
Active Support version 1.2.5
Application root C:/dev/me/sandbox
Environment development
Database adapter mysql
cool, I move my rails code around on multiple machines a lot, and it's always nice to have a way to check what versions and gems i have installed on whichever machine i touched last :) now, if they'd just make an easy way for me to tell which gem files i've patched manually... ;)
I'm not sure it lists all gems used. For instance I tried out your Flickr code and then ran ruby script/about and it didn't list the Flickr gem.
Still, useful info.
As is proven in the ontological manuals, it is not at all certain that time has lying before it the Transcendental Deduction; consequently, the objects in space and time would be falsified.
Has it ever been suggested that, because of our necessary ignorance of the conditions, to avoid all misapprehension, it is necessary to explain that there is no relation between the objects in space and time and our a posteriori concepts?