gistfile1.sh

This example shows how to setup an environment running Rails 3 beta 3 under 1.9.2-head with a 'rails3' gem set.

∴ rvm update --head
# ((Open a new shell)) or do 'rvm reload'

# If you do not already have the ruby interpreter installed, install it:
∴ rvm install 1.9.2-head

# Switch to 1.9.2-head and gemset rails3, create if it doesn't exist. 
∴ rvm --create use 1.9.2-head@rails3

# Download the gems(et) file for rails3 beta 3:
# ∴ curl -L http://rvm.beginrescueend.com/gemsets/rails3b3.gems -o rails3b3.gems 
# Load the gems(et) file into the current gem environment.
#∴ rvm gemset import rails3b3.gems
# ^^^ Is no longer necessary, at this point all dependencies are installed automatically if you do:
∴ gem install rails --pre

# Check to see we now have Rails 3.0.0 beta3
∴ rails --version
Rails 3.0.0.beta3