ext-map

just an object that maps `src` file extensions to `dest` file extensions as key/value pairs (e.g. `{'.less': '.css'}`). Useful for dynamically rewriting paths in tasks/plugins. pull requests welcome.

rewrite-ext

Automatically re-write the destination extension of a filepath based on the source extension. e.g `.coffee` => `.js`. This will only rename the ext, no other path parts are modified.