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import random

from fabric.contrib.files import append, exists

from fabric.api import cd, env, local, run

REPO_URL = 'https://github.com/hjwp/book-example.git'

def deploy():

site_folder = f'/home/{env.user}/sites/{env.host}'

run(f'mkdir -p {site_folder}')

with cd(site_folder):

_get_latest_source()

_update_virtualenv()

_create_or_update_dotenv()

_update_static_files()

_update_database()

def _get_latest_source():

if exists('.git'):

run('git fetch')

else:

run(f'git clone {REPO_URL} .')

current_commit = local("git log -n 1 --format=%H", capture=True)

run(f'git reset --hard {current_commit}')

def _update_virtualenv():

if not exists('virtualenv/bin/pip'):

run(f'python3.6 -m venv virtualenv')

run('./virtualenv/bin/pip install -r requirements.txt')

def _create_or_update_dotenv():

append('.env', 'DJANGO_DEBUG_FALSE=y')

append('.env', f'SITENAME={env.host}')

current_contents = run('cat .env')

if 'DJANGO_SECRET_KEY' not in current_contents:

new_secret = ''.join(random.SystemRandom().choices(

'abcdefghijklmnopqrstuvwxyz0123456789', k=50

))

append('.env', f'DJANGO_SECRET_KEY={new_secret}')

def _update_static_files():

run('./virtualenv/bin/python manage.py collectstatic --noinput')

def _update_database():

run('./virtualenv/bin/python manage.py migrate --noinput')