unimplemented!()

            let mut ar =
                tar::Archive::new(flate2::read::GzDecoder::new(r.take(self.data.file_size)));
            for e in ar.entries().unwrap() {
                let mut e = e.unwrap();
                debug!("gz decompress {:?}", e.path());
                // f(&e.path()?);
                e.unpack_in(&path).unwrap();
            }

            unimplemented!()

            let mut decompressor = flate2::read::GzDecoder::new(&ctrl[..]);
            let mut result = Vec::new();
            decompressor.read_to_end(&mut result)?;
            result