Use either 1.9.3 or 1.9.2 with RVM

.rvmrc

#!/usr/bin/env bash

ruby_string="ruby-1.9.3"
ruby_alt_string="ruby-1.9.2"
gemset_name="tavignano"

if (( `rvm list strings | grep -c "${ruby_string}"` ))
then
	# Load or create the specified environment
  rvm --create use "${ruby_string}@${gemset_name}"
elif (( `rvm list strings | grep -c "${ruby_alt_string}"` ))
then
  # Load or create the specified environment
  rvm --create use "${ruby_alt_string}@${gemset_name}"
else
  # Notify the user to install the desired interpreter before proceeding.
  echo "${ruby_string} was not found, please run 'rvm install ${ruby_string}' and then cd back into the project directory."
fi