this.tarFile = tarFile

        boolean gzip = !tarFile.name.endsWith("tar")
        tarFile.withInputStream { inputStream ->
            TarArchiveInputStream tarInputStream = new TarArchiveInputStream(gzip ? new GZIPInputStream(inputStream) : inputStream, metadataCharset)
            for (TarArchiveEntry tarEntry = getNextEntry(tarInputStream); tarEntry != null; tarEntry = getNextEntry(tarInputStream)) {

        }
        tarOutput.close();
    }

    @Override
    public void unpack(DataSource input, DataTargetFactory targetFactory) throws IOException {
        TarArchiveInputStream tarInput = new TarArchiveInputStream(input.openInput());
        while (true) {
            TarArchiveEntry entry = tarInput.getNextEntry();
            if (entry == null) {
                break;
            }