def validate_host()

in application-workloads/jupyter/jupyterhub-classroom/scripts/bootstrap.py [0:0]

• 19 lines of code
• 7 McCabe index (conditional complexity)

def validate_host():
    """
    Make sure TLJH is installable in current host
    """
    # Support only Ubuntu 18.04+
    distro = get_os_release_variable('ID')
    version = float(get_os_release_variable('VERSION_ID'))
    if distro != 'ubuntu':
        print('The Littlest JupyterHub currently supports Ubuntu Linux only')
        sys.exit(1)
    elif float(version) < 18.04:
        print('The Littlest JupyterHub requires Ubuntu 18.04 or higher')
        sys.exit(1)

    if sys.version_info < (3, 5):
        print("bootstrap.py must be run with at least Python 3.5")
        sys.exit(1)

    if not (shutil.which('systemd') and shutil.which('systemctl')):
        print("Systemd is required to run TLJH")
        # Only fail running inside docker if systemd isn't present
        if os.path.exists('/.dockerenv'):
            print("Running inside a docker container without systemd isn't supported")
            print("We recommend against running a production TLJH instance inside a docker container")
            print("For local development, see http://tljh.jupyter.org/en/latest/contributing/dev-setup.html")
        sys.exit(1)