Question

We use svn:ingored to mask out externally sourced files (aka compiled or copied) from our projects.
Is there a way to remove just those files and directories as part of an ant cleanup target?

Answer 1

Never used svnant, but from the documentation it seems they provide some selectors, a svnIgnored selector f.e.,
so in theory it should work like that :

 <delete>
  <fileset dir="workingcopy">
   <svnIgnored/>
  </fileset>
 </delete>