#!/usr/bin/python
#
# see
# https://sourceforge.net/tracker/index.php?func=detail&aid=1336623&group_id=5470&atid=105470
#
#

import tarfile
import sys
from string import find

tar = tarfile.open(sys.argv[1], "r:gz")

namelist = [tarinfo.name for tarinfo in tar]

def is_unique(tname):
    for t in namelist:
        if t == tname:
            continue
        elif not find(t, tname, 0, len(tname)):
            return False
    return True

for tarinfo in tar:
    if is_unique(tarinfo.name):
        tar.extract(tarinfo)