extglob is in there for future improvements. I plan to make it robust enough to accept parameters in the future.

When building Ruby the output complained about some missing deps. libffi-dev and libyaml-dev made Ruby stop complaining about them :)

Bundler is installed on the system because you don't have to install Rails on the system. You could simply put Ruby on there, install bundler then when you upload your app and run "bundle" it will pull down Rails and any gems your app depends on. Having Bundler available on the system is needed if you don't install the Rails gem system wide.

Use the script however you see fit and feel free to take from it what you like :)