fabfile.py

from fabric.contrib.files import exists
from fabric.api import env, run
from os import path


REPO_URL = 'https://github.com/hjwp/book-example.git'
SITES_FOLDER = '/home/harry/sites'

def deploy():
    _create_directory_structure_if_necessary(env.host)
    source_folder = path.join(SITES_FOLDER, env.host, 'source')
    _get_latest_source(source_folder)
    _update_virtualenv(source_folder)
    _update_static_files(source_folder)
    _update_database(source_folder)


def _create_directory_structure_if_necessary(site_name):
    base_folder = path.join(SITES_FOLDER, site_name)
    run('mkdir -p %s' % (base_folder))
    for subfolder in ('database', 'static', 'virtualenv', 'source'):
        run('mkdir -p %s/%s' % (base_folder, subfolder))


def _get_latest_source(source_folder):
    if exists(path.join(source_folder, '.git')):
        run('cd %s && git pull' % (source_folder,))
        run('cd %s && git reset --hard' % (source_folder,))
    else:
        run('git clone %s %s' % (REPO_URL, source_folder))


def _update_virtualenv(source_folder):
    virtualenv_folder = path.join(source_folder, '../virtualenv')
    if not exists(path.join(virtualenv_folder, 'bin', 'pip')):
        run('virtualenv %s' % (virtualenv_folder,))
    run('%s/bin/pip install -r %s/requirements.txt' % (
            virtualenv_folder, source_folder
    ))


def _update_static_files(source_folder):
    run('cd %s && python manage.py collectstatic --noinput' % (
        source_folder,
    ))


def _update_database(source_folder):
    run('cd %s && python manage.py syncdb --noinput' % (
        source_folder,
    ))