Running yuicompressor with Ant

I use Ant in Netbeans to run yuicompressor over a set of javascript files as part of my PHP project build process.

I already have it running beautifully on all the .js files in a single directory, but I want to also run it over this sort of structure:

 /A/B/C/a.js
 /A/B/D/b.js
 /A/B/E/c.js
 /A/B/F/d.js
 /A/B/G/e.js

and end up with minified files like this:

 /A/B/C/a-min.js
 /A/B/D/b-min.js
 /A/B/E/c-min.js
 /A/B/F/d-min.js
 /A/B/G/e-min.js

I can't get my head around the Ant build file stuff needed to select the input files and map the output files to do this.