This script will install
ruby-debug19 under your current Ruby
curl -s https://raw.github.com/gist/1949234/rbenv.sh | sh
What if I have patched my Ruby version, like 'ruby-1.9.3-p125 cumulative performance patch'?
Don't worry, this installation script will just work. ;)
Did you have an inspiration?
Nope, just followed @spastorino's great article on http://blog.wyeworks.com/2011/11/1/ruby-1-9-3-and-ruby-debug!