install_rails3.sh

# Dependencies: ruby, git, rubygems

sudo gem install bundler
git clone git://github.com/rails/rails.git
cd rails && gem bundle

ruby -rvendor/gems/environment railties/bin/rails ../new_app
cd ../new_app

# edit Gemfile to use:
gem "rails", :git => "file:///path/to/rails"
gem "arel", :git => "git://github.com/rails/arel.git"
gem "rack", :git => "git://github.com/rails/rack.git"

gem bundle
./script/server