Synnefo

import sys

import pkg_resources

import inspect

def get_entry_ponts(ns, name):

    for entry_point in pkg_resources.iter_entry_points(group=ns):

        if entry_point.name == name:

            yield entry_point

def extend_settings(ns, module_name):

    """

    Extend module from entry_point hooks

    """

    settings = sys.modules[module_name]

    # apps hook

    app_entry_points = get_entry_ponts(ns, 'apps')

    # settings hook

    settings_entry_points = get_entry_ponts(ns, 'settings')

    # extend INSTALLED_APPS setting

    NEW_INSTALLED_APPS = list(getattr(settings, 'INSTALLED_APPS', []));

    # if failed to execute app hook as function parse it as string

    # synnefo.app:get_additional_apps or app1,app2,app3

    for e in app_entry_points:

        try:

            NEW_INSTALLED_APPS = list(e.load()())

        except Exception, e:

            for e in app_entry_points:

                NEW_INSTALLED_APPS = NEW_INSTALLED_APPS + \

                        e.module_name.split(",")

    # extend additional settings

    # TODO: existing settings logic ??

    for e in settings_entry_points:

        module = e.load()

        for k in dir(module):

            if k == k.upper():

                setattr(settings, k, getattr(module, k))

    setattr(settings, 'INSTALLED_APPS', NEW_INSTALLED_APPS)