Install rvm rubies; use example config

.gitignore

@@ -0,0 +1 @@
+config.rb

README.md

@@ -21,7 +21,11 @@ You need to install Sprinkle:
 
     gem install sprinkle
 
-Check out the Continuous Sprinkles repository, and edit config.rb to use your CI's host name. Then cd into the checked out Continuous Sprinkles repository, and run:
+Check out the Continuous Sprinkles repository, copy the config.example.rb to config.rb, and edit config.rb to use your CI's host name:
+
+    HOST = 'ci.mydomain.com'
+
+ Then cd into the checked out Continuous Sprinkles repository, and run:
 
     sprinkle -s main.rb
 

config.example.rb

@@ -0,0 +1,2 @@
+HOST = "ci.yourhost.com"
+RUBIES = %w(jruby-1.5.6 ree-1.8.7-2010.02 ruby-1.8.7-p174 ruby-1.9.2-p180)

main.rb

@@ -9,6 +9,7 @@
 require 'packages/iptables'
 require 'packages/rvm'
 require 'packages/git'
+require 'packages/rvm_rubies'
 
 deployment do
   delivery :capistrano do
@@ -29,6 +30,7 @@
   requires :ruby
   requires :rubygems
   requires :rvm
+  requires :rvm_rubies
   requires :mysql
   requires :postgres
   requires :redis

packages/rvm_rubies.rb

@@ -0,0 +1,22 @@
+package :rvm_rubies do
+  description "Useful versions of Ruby within RVM"
+  requires RUBIES.map { |version| "ruby_#{version}" }
+end
+
+RUBIES.each do |version|
+  package "ruby_#{version}" do
+    runner "sudo -u jenkins -H -i rvm install #{version}"
+    verify do
+      has_executable "/var/lib/jenkins/.rvm/rubies/#{version}/bin/ruby"
+    end
+    requires :build_essential
+  end
+end
+
+package :build_essential do
+  description "Essential compiler tools"
+  apt "build-essential"
+  verify do
+    has_apt "build-essential"
+  end
+end