// lists files only - who needs to list directories?!
// lists in typical .zip fashion - dir1/dir2/bla.txt
static L<S> listZipFile(File inZip) ctex {
  ZipFile zipFile = new ZipFile(inZip);
  try {
    ret listZipFile(zipFile);
  } finally {
    zipFile.close();
  }
}
    
static L<S> listZipFile(ZipFile zipFile) ctex {
  new L<S> list;
  Enumeration entries = zipFile.entries();
  while (entries.hasMoreElements()) {
    ZipEntry entry = (ZipEntry) entries.nextElement(); 
    if (!entry.isDirectory())
      list.add(entry.getName());
  }
  ret list;
}

static L<S> listZipFile(S name) {
  if (isSnippetID(name)) ret listZipFile(loadLibrary(name));
  ret listZipFile(getProgramFile(name));
}

Began life as a copy of #1001173