JRuby Goldspike in Context Root

If you're using JRuby's Goldspike plugin to create a WAR for deployment, you might discover that rake war:standalone:run puts the application into a named context (e.g. http://localhost:8080/myapplication). Since most Ruby applications run at the root, this might disrupt your application if it wasn't built to handle a changing path (or your remote tests, which might have the same problem).

Fortunately, it's very easy to modify Goldspike to use the root:

1. Open vendor/plugins/goldspike/lib/run.rb
2. Find the WebAppContext definition
3. Adjust the second argument from
   <Arg>/<%= config.name %></Arg>
   to:
   <Arg>/</Arg>

You're done. When Jetty boots up, you'll see something like "NO JSP Support for /, did not ...". The "/" is the context, so you're in good shape.