Editing default configurations at a module level

Hi,

I'm running IntelliJ 12 with the ruby plugin.  I'd like to either be able to use an environment variable ($MODULE_DIR$ or something) in arbitary fields in the run/debug configurations, or have a way to configure the default settings per module.

The concrete example is I have 3 ruby projects which use RSpec.  I would like to be able to configure the Working Directory to be based off of the module directory, and have a log location for each ruby module.

Is there a way to do this currently?