How do I explore the source of a gem that isn't installed?

Question

I just have the gem on my desktop. How can I inspect it's source in Sublime Text or Xcode or anything really? I know I can check installed gems out with Sublime Text, what about uninstalled ones?

Answer 1

If you don't have the gem tool either (unlikely, but just in case), a gem is a tar archive with several gz and tar.gz files in it, so you can get the contents using the standard tar and gzip utilities.

Answer 2

gem unpack foo.gem then just go into the foo/ directory

see http://guides.rubygems.org/command-reference/#gem_unpack