def _prepare(self, pbw_path):
self._bundle = PebbleBundle(
pbw_path,
hardware=self._pebble.watch_info.running.hardware_platform)
if not self._bundle.is_app_bundle:
raise AppInstallError("This is not an app bundle.")
self.total_size = self._bundle.zip.getinfo(
self._bundle.get_app_path()).file_size
if self._bundle.has_resources:
self.total_size += self._bundle.zip.getinfo(
self._bundle.get_resource_path()).file_size
if self._bundle.has_worker:
self.total_size += self._bundle.zip.getinfo(
self._bundle.get_worker_path()).file_size
