def _get_data_files(self):
        """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
        self.analyze_manifest()
        return list(map(self._get_pkg_data_files, self.packages or ()))
Generate list of '(package,src_dir,build_dir,filenames)' tuples
product/gradle-plugin/src/main/python/setuptools/command/build_py.py