FSEventDirWatch

try:
    import pyfsevents
except ImportError:
    raise
else:
    class FSEventDirWatch(DirWatch):
        def __init__(self):
            pass
    
        def wait(self, bld):
            for x in self.enumerate(bld.srcnode):
                path = os.path.abspath(x)
                
                pyfsevents.registerpath(path, self.callback)
            
            pyfsevents.listen()
            pyfsevents.clear()
    
        def callback(self, path, isrec):
            print `path, isrec`
            pyfsevents.stop()

    DefaultDirWatch = FSEventDirWatch