You know, I’ve always wondered why requiring a library on the command line is ruby -r library but you can require rubygems with ruby -rubygems. Here’s why:
[rubygems-1.3.5] cat lib/ubygems.rb
# This file allows for the running of rubygems with a nice
# command line look-and-feel: ruby -rubygems foo.rb
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++
require 'rubygems'
Nice hack.