!include once #1024944 // Apache Commons Compress

import org.apache.commons.compress.archivers.tar.*;

svoid zip2tar(File inZip, File outTar) ctex {
  temp FileOutputStream out = newFileOutputStream(outTar);
  zip2tar(inZip, out);
}

svoid zip2tar(File inZip, OutputStream out) {
  zip2tar(inZip, bufferedOutputStream(out));
}

svoid zip2tar(File inZip, BufferedOutputStream out) ctex {
  TarArchiveOutputStream tarOut = new(out);
  tarOut.setLongFileMode(tarOut.LONGFILE_GNU);
  zip2tar(inZip, tarOut);
  out.flush();
}

svoid zip2tar(File inZip, TarArchiveOutputStream outTar) ctex {
  ZipFile zipFile = new ZipFile(inZip);
  Enumeration entries = zipFile.entries();
  while (entries.hasMoreElements()) {
    ZipEntry entry = (ZipEntry) entries.nextElement(); 
    //System.out.println("Copying " + entry.getName());
    TarArchiveEntry te = new(entry.getName());
    te.setModTime(entry.getTime());
    te.setSize(entry.getSize());
    outTar.putArchiveEntry(te);

    InputStream fin = zipFile.getInputStream(entry);
    copyStream(fin, outTar);
    fin.close();
    outTar.closeArchiveEntry();
  }
  outTar.flush();
  zipFile.close();
}

Began life as a copy of #1001173