- jruby -S gem install warbler sinatra
- Download Google App Engine SDK for Java
- Add the <appengine-sdk>/bin dir to your PATH
- Edit appengine-web.xml and add your app name in <application></application>
jruby -S rake appengine:server
jruby -S rake appengine:deploy EMAIL=<your email> PASSWORD=<your password>
Thanks to the JRuby team and http://jruby-rack.appspot.com/ for making this so easy!