A quick work-around to get rake assets:precompile to work when using the jruby-complete.jar.
How to set up a JRuby project using the jruby-complete.jar using Bundler to manage gem dependencies.
Here are a few reasons why you might want to embed JRuby into your application instead of relying on a regular Ruby or JRuby installation.
In a JRuby project, it’s easy to run Ruby programs without installing Ruby. All you need is a JVM runtime and jruby-complete.