The Fabric script (fabfile.py) with deploy common implementation

fabfile.py

# -*- coding: utf-8 -*-

from fabric.api import cd, hide, settings, show, path, prefix, lcd, require,\
    prompt, put, get, run, sudo, local, reboot, open_shell, env, output,    \
    abort, warn, puts, fastprint, execute
from fabric.contrib.console import confirm
import datetime
import sys

###############################################################################
# THE CONFIGURATION SECTION. CHANGE YOUR SETTINGS HERE                        #
###############################################################################

env.hosts = ['username@hostname.com']
env.directory = '/home/username/hostname.com/'
env.activate  = 'source {directory}.env/bin/activate'.format(directory=env.directory)
env.deploy_user = 'username'
env.settings = ''

###############################################################################
# YOU DON'T NEED TO EDIT ANYTHING BELOW THIS COMMENTS                         #
###############################################################################

def virtualenv(command):
    """
    Runs the command in the virtuale environment
    """
    with cd(env.directory):
        run(env.activate + ' && ' + command)

def manage(command, settings=env.settings):
    """
    Runs the Django management command (manage.py) with the given
    settings module
    """
    with cd(env.directory):
        virtualenv('python ./src/manage.py {command} --settings=settings{settings}'.format(
            command = command,
            settings = settings,
        ))

###############################################################################
# Meta commands                                                               #
###############################################################################

def deploy(settings=env.settings):
    local_update_requirements()
    local_vcs_sync()
    remote_vcs_sync()
    remote_update_requirements()
    remote_syncdb(settings)
    remote_generate_configs(settings)
    remote_clean_cache()
    remote_restart_service(settings)

###############################################################################
# Atomic commands                                                             #
###############################################################################

def local_update_requirements():
    """
    Updates the requirements.txt file
    """
    local('pip freeze -r {requirements} > {requirements}'.format(
        requirements = 'requirements.txt'
    ))

def local_vcs_sync():
    """
    Synchronize the local developer copy with GIT repository
    """
    with settings(warn_only=True):
        add = local('git add .', capture=True)

        if not add.failed:
            local('git commit -m "{message}"'.format(message="Autocommit "+\
                                                             "via Fabric at {date}".format(
                date = datetime.datetime.now().isoformat()
            )), capture=True)

        pull = local('git pull origin master', capture=True)
        push = local('git push origin master', capture=True)

def remote_vcs_sync():
    """
    Update the source code on server
    """
    with cd(env.directory):
        run('git pull origin master')

def remote_update_requirements(update=False, ignore=False):
    """
    Update requirements
    """
    virtualenv('pip install {update} {ignore} -r {path}requirements.txt'.format(
        path   = env.directory,
        update = '-U' if update else '',
        ignore = '-I' if ignore else ''))

def remote_syncdb(settings=env.settings):
    """
    Synchronizes the database via South
    """
    manage('syncdb', settings)
    manage('migrate', settings)

def remote_generate_configs(settings=env.settings):
    """
    Generates configuration files from templates
    """
    manage('config_gen', settings)

def remote_restart_service(settings=env.settings):
    """
    """
    run('sudo svc -du /etc/service/hostname.com') # @TODO: remove hardcoded

def remote_clean_cache():
    """
    Clean all memcache values
    """
    run('echo flush_all | nc localhost 11211')