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python-3.xtartarfile

how to mimic `--numeric-owner` in tarfile?

with tar command we can use tar --numeric-owner -cf - test | tee to make sure in tar data it use number to represent owner:group. How can we do this in python3's tarfile? It seems only extract mentioned numeric owner.

Solution

  • I've faced a similar problem. After some investigation the only solution I was able to come up with was to pass a TarInfo filter when adding the files to the tarball. Something like:

    def tar_filter(tarinfo: TarInfo) -> TarInfo:
    # tar filter to mimic --numeric-owner argument
    tarinfo.uname = ''
    tarinfo.gname = ''
    return tarinfo

with tarfile.open(<tar_file_name>, w:gz) as tar:
    tar.add(<file_to_add>, filter=tar_filter)