code: def ostree_path(self):
          
          if self._ostree_path is None:
              self._ostree_path = os.path.join(self.tmpdir, "ostree-repo")
              subprocess.check_call(["ostree", "init", "--mode", "bare-user-only",
                                     "--repo", self._ostree_path])
          return self._ostree_path
docs: ostree repository -- content