threadsafe! & engines

I'm having a problem with rails 2.3.2, engines, and eager loading. There is a default set of eager_load_paths (the usual suspects under app/) that will be greedily required by rails at boot time when you're running with threadsafe! on, and of course you can append your own custom paths. However, so far as I can tell, engines are never eagerly loaded and therefore unavailable when the system is running in threadsafe! mode.

First, I'd like to know if I'm missing something. I looked through the plugin loader, found the code that loads the engines, and could not discover how, if at all, it attempts to eager load them. I also explored the rails initializer in railties, found the eager loading code, and didn't see anything related to plugins there.

So far as workarounds go it appears subclassing the plugin loader is the best option. If there is a better approach, I'm interested.

Your help is greatly appreciated,

-Tyler Jennings

Pinged core, it's a bug.