Switch between multiple rubies

gistfile1.sh

function use_ruby_186 {
 export MY_RUBY_HOME=/System/Library/Frameworks/Ruby.framework/Versions/Current/usr
 export GEM_HOME=~/.gem/ruby/1.8
 update_path
}


function use_ruby_187 {
 export MY_RUBY_HOME=/opt/local
 export GEM_HOME=~/.gem/ruby/1.8
 update_path
}

function use_jruby_116 {
# after installing JRuby:
# sudo mkdir -p /opt/local/multiruby/jruby-1.1.6/bin/# 
# sudo ln -s /opt/local/bin/jtestrb /opt/local/multiruby/jruby-1.1.6/bin/testrb
# sudo ln -s /opt/local/bin/jruby /opt/local/multiruby/jruby-1.1.6/bin/ruby
# sudo ln -s /opt/local/bin/jrake /opt/local/multiruby/jruby-1.1.6/bin/rake
# sudo ln -s /opt/local/bin/jirb /opt/local/multiruby/jruby-1.1.6/bin/irb
# sudo ln -s /opt/local/bin/jgem /opt/local/multiruby/jruby-1.1.6/bin/gem
 export MY_RUBY_HOME=/opt/local/multiruby/jruby-1.1.6
 export GEM_HOME=~/.gem/jruby/1.8
 update_path
}
 
function use_ree_186 {
 export MY_RUBY_HOME=/opt/ruby-enterprise-1.8.6-20090201
 export GEM_HOME=~/.gem/ruby/1.8
 update_path
}

function use_ruby_191 {
# after installing Ruby 1.9.1:
# sudo mkdir -p /opt/local/multiruby/ruby-1.9.1/bin/# 
# sudo ln -s /opt/local/bin/testrb1.9 /opt/local/multiruby/ruby-1.9.1/bin/testrb
# sudo ln -s /opt/local/bin/ruby1.9 /opt/local/multiruby/ruby-1.9.1/bin/ruby
# sudo ln -s /opt/local/bin/rdoc1.9 /opt/local/multiruby/ruby-1.9.1/bin/rdoc
# sudo ln -s /opt/local/bin/gem1.9 /opt/local/multiruby/ruby-1.9.1/bin/gem
# sudo ln -s /opt/local/bin/erb1.9 /opt/local/multiruby/ruby-1.9.1/bin/erb
# sudo ln -s /opt/local/bin/irb1.9 /opt/local/multiruby/ruby-1.9.1/bin/irb
# sudo ln -s /opt/local/bin/ri1.9 /opt/local/multiruby/ruby-1.9.1/bin/ri
 export MY_RUBY_HOME=/opt/local/multiruby/ruby-1.9.1
 export GEM_HOME=~/.gem/ruby/1.9
 update_path
}


function update_path {
  export PATH=$GEM_HOME/bin:$MY_RUBY_HOME/bin:$PATH
  export RUBY_VERSION="$(ruby -v | colrm 11)"
  display_ruby_version
}

function display_ruby_version {
 if [[ $SHELL =~ "bash" ]]; then
   echo "Using $RUBY_VERSION"
 fi
 # On ZSH, show it on the right PS1
 export RPS1=$RUBY_VERSION
}

use_ruby_187