https://rvm.beginrescueend.com/
RVM ~ Ruby Environment Manager ~ Ruby Gem Library
- gem install rvm
Most common ways to use RVM from ruby process
require 'rvm'
RVM.gemset_use! 'rails3'
RVM.use_from_path! '/path/to/project' # The same ruby has to be used
The most common use for this gem is in Passenger integration:
$ rake spec