How do I upgrade a rails 3.2 app from ruby 1.9.3 to ruby 2.1.5 using rvm
问题 My Rails 3.2 / Ruby 1.9.3 app is using RVM. I want to upgrade to using ruby 2.1.5. I have used RVM to install Ruby 2.1.5 as well. So rvm list shows both 1.9.3 and 2.1.5 My project directory has a .rvmrc file specifying environment_id="ruby-1.9.3-p551@current_foogems" So I have a gemset named current_foogems How can I switch my project to use ruby 2.1.5? Do I copy the gemset? Create a new (empty) gemset? Given the jump in ruby version from 1.9.3 to 2.1.5, which may mean I should recompile gems