def _is_netcheck_successful()

in sdw_updater/UpdaterApp.py [0:0]

• 15 lines of code
• 4 McCabe index (conditional complexity)

def _is_netcheck_successful() -> bool:
    """
    Helper function to assess network connectivity before launching updater.

    Assess network connectivity by checking connection status (via nmcli) in
    sys-net.
    """
    command = b"nmcli networking connectivity check"

    if not Util.get_qubes_version():
        logger.error("QubesOS not detected, cannot check network.")
        return False
    try:
        # Use of `--pass-io` is required to check on network status, since
        # nmcli returns 0 for all connection states we need to report back to dom0.
        result = subprocess.check_output(["qvm-run", "-p", "sys-net", command])
        return result.decode("utf-8").strip() == "full"
    except subprocess.CalledProcessError as e:
        logger.error(
            "{} (connectivity check) failed; state reported as {}".format(
                command.decode("utf-8"), e.output
            )
        )
        return False