initial version of plugins system

This commit is contained in:
Serghei Mihai 2014-09-02 16:22:37 +02:00
parent 8437ef501b
commit dcd9549295
4 changed files with 71 additions and 1 deletions

View File

@ -4,6 +4,10 @@ from django.db.models.signals import class_prepared
MAX_USERNAME_LENGTH = 255
from . import plugins
plugins.init()
def longer_username_signal(sender, *args, **kwargs):
if (sender.__name__ == "User" and
sender.__module__ == "django.contrib.auth.models"):

View File

@ -0,0 +1,59 @@
from pkg_resources import iter_entry_points
import logging
from django.conf.urls import patterns, include, url
logger = logging.getLogger(__name__)
PLUGIN_GROUP_NAME = 'portail_citoyen2.plugin'
class PluginError(Exception):
pass
def get_plugins(*args, **kwargs):
plugins = []
for entrypoint in iter_entry_points(PLUGIN_GROUP_NAME):
try:
plugin = entrypoint.load()
except Exception, e:
logger.exception('failed to load entrypoint %s', entrypoint)
raise PluginError('failed to load entrypoint %s' % entrypoint)
plugins.append(plugin(*args, **kwargs))
return plugins
def register_plugins_urls(urlpatterns):
pre_urls = []
post_urls = []
for plugin in get_plugins():
if hasattr(plugin, 'get_before_urls'):
pre_urls.append(url('^', include(plugin.get_before_urls())))
if hasattr(plugin, 'get_after_urls'):
post_urls.append(url('^', include(plugin.get_after_urls())))
pre_patterns = patterns('', *pre_urls)
post_patterns = patterns('', *post_urls)
return pre_patterns + urlpatterns + post_patterns
def register_plugins_apps(installed_apps):
for plugin in get_plugins():
if hasattr(plugin, 'get_apps'):
apps = plugin.get_apps()
for app in apps:
if app not in installed_apps:
installed_apps += (app, )
return installed_apps
def register_plugins_middleware(middlewares):
for plugin in get_plugins():
if hasattr(plugin, 'get_before_middleware'):
pre_middleware = plugin.get_before_middleware()
middlewares = tuple(set(pre_middleware + middlewares))
if hasattr(plugin, 'get_after_middleware'):
post_middleware = plugin.get_after_middleware()
middlewares = tuple(set(post_middleware + middlewares))
return middlewares
def init():
for plugin in get_plugins():
if hasattr(plugin, 'init'):
plugin.init()

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@ -3,6 +3,8 @@ from django.core.exceptions import ImproperlyConfigured
import os
import logging.handlers
from . import plugins
gettext_noop = lambda s: s
# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'portail_citoyen2.wsgi.application'
@ -105,6 +107,8 @@ MIDDLEWARE_CLASSES = (
'entrouvert.djommon.middleware.VersionMiddleware',
)
MIDDLEWARE_CLASSES = plugins.register_plugins_middleware(MIDDLEWARE_CLASSES)
ROOT_URLCONF = 'portail_citoyen2.urls'
INSTALLED_APPS = (
@ -136,6 +140,8 @@ INSTALLED_APPS = (
'portail_citoyen2',
)
INSTALLED_APPS = plugins.register_plugins_apps(INSTALLED_APPS)
try:
import cmsplugin_blurp
INSTALLED_APPS += (

View File

@ -2,7 +2,7 @@ from django.conf.urls import patterns, include, url
from django.contrib import admin
from django.conf import settings
from . import views
from . import views, plugins
admin.autodiscover()
@ -31,3 +31,4 @@ urlpatterns += patterns('',
url(r'^', include('cms.urls')),
)
urlpatterns = plugins.register_plugins_urls(urlpatterns)