by October 3, 2011on
During my attempts to install Vagrant 1 on my gentoo machine I stumpled upon RVM – the ruby version manager. Using RVM you are able to maintain multiple ruby environments in parallel. So you can have i.e. ruby-1.8.7 and ruby-1.9.2 installed next to each other and switch with only a couple of commands.
The RVM installation process is explained in detail on the RVM website but I just want to sum up the steps I did on my machine.
# fetch rvm sources $ bash < <(curl -sk https://rvm.beginrescueend.com/install/rvm) # source rvm scripts on shell login $ echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"' >> ~/.zshrc # emerge required packages $ emerge -va libiconv readline zlib openssl curl git libyaml sqlite libxslt libtool bison
Now you are ready to install and load a ruby instance of your liking:
$ rvm install 1.9.2 $ rvm use 1.9.2
RVM allows you to have multiple sets of RubyGems even for one single ruby version – these sets are called gemsets. A typical workflow borrowed from the RVM website looks like this:
$ rvm 1.9.2 $ gem install rails -v 2.3.3 $ rvm gemset create rails222 rails126 $ rvm 1.9.2@rails222 $ gem install rails -v 2.2.2 $ rvm 1.9.2@rails126 $ gem install rails -v 1.2.6 $ rvm 1.8.7 $ gem install rails -v 1.2.3