How to use the cmake.bundle.Bundler function in cmake

def bundle(self, target = None):
        """ make sure that everything target links to is in the bundle """
        if target == None:
            self.bundle(self.exepath)
            return
        lib_file = os.popen('otool -LX ' + target)
        assert(lib_file)
        for l in lib_file:
            id = l.strip().split()[0] # get the link id of the library
            for prefix in Bundler.LOCALS:
                if id.startswith(prefix):
                    self.addlib(id, target)
        lib_file.close()

def main():
    global bundle, bundleapp, libpath, libprefix, executable
    assert(len(sys.argv) > 2)
    bundler = Bundler(sys.argv[1], sys.argv[2])
    bundler.bundle()