ruby in .profile

.profile

export GEM_HOME=$HOME/.gem/ruby/active
export PATH=$HOME/.gem/ruby/active/bin:$PATH

chruby.bash

# This is the bash version of the zsh script
# Load it in your .profile or .bashrc / .login script

# Its been tweaked for separate gem directories in $HOME/.gem

chruby () 
{
	v=`ruby -e "puts RUBY_VERSION.split('.')[0,2].join('.')"`
	if [ $v = "1.9" ]; then 
		cv="1.8"
		cvf="1.8"
	else
		cv="1.9"
		cvf="1.9.1"
	fi
	rubyexes=(erb gem irb rake rdoc ri ruby testrb)
	for i in ${rubyexes[*]}; do
		sudo unlink "/opt/local/bin/${i}"
		sudo ln -s "/opt/local/bin/${i}${cv}" "/opt/local/bin/${i}"
	done
	unlink "$HOME/.gem/ruby/active"
	ln -s "$HOME/.gem/ruby/${cvf}" "$HOME/.gem/ruby/active"
	
	echo "Now Running: "`ruby -v`
}