SVN Add for Phing Buildfile

SVN Add for Phing Buildfile

I've got a phing buildfile where I've got some svn tasks like commit,
update, export and checkout working just fine. But I have one problem...
if I have add some new files to the local repo dir, i need to "add" them
in the SVN before commit (i do that with TortoiseSVN), and that's the
problem, I can't automate this with Phing because I can't find out how can
I make phing add the files for revision.