Django command to dealing with certbot (let's encrypt, letsencrypt.org) and nginx

certbot.py

import os

from django.core.management.base import BaseCommand
from django.conf import settings


COMMAND = f'''
    ./var/env/bin/certbot {{}}
        --config-dir=./var/certbot/cfg
        --work-dir=./var/certbot/work
        --logs-dir=./var/log/certbot
        --renew-hook "sudo /etc/init.d/nginx reload"
'''
COMMAND = ' '.join(COMMAND.split())


class Command(BaseCommand):
    help = 'Obtain and renew certificates with certbot'

    def add_arguments(self, parser):
        parser.add_argument('command', help='obtain or revew')

    def handle(self, *args, **options):
        command = options['command']
        assert command in ['obtain', 'renew']
        globals()[command]()


def obtain():
    host = settings.HOST
    dir = './static/root'
    os.makedirs(dir, exist_ok=True)
    command = COMMAND.format(
        f'certonly --webroot -w {dir} -d {host} -d {host}')
    print(command)
    os.system(command)


def renew():
    command = COMMAND.format(f'renew')
    print(command)
    os.system(command)