use setuptools entrypoints to load plugins

polynum/settings.py

@@ -5,6 +5,7 @@ import os.path
 import django.conf.global_settings as DEFAULT_SETTINGS
 from django.core.urlresolvers import reverse_lazy
 from logging.handlers import SysLogHandler
+import pkg_resources
 
 PROJECT_ROOT = os.path.join(os.path.dirname(__file__), '.')
 
@@ -154,6 +155,14 @@ INSTALLED_APPS = (
     'ajax_select',
 )
 
+# Load plugin applications
+for entrypoint in pkg_resources.iter_entry_points('polynum_plugin'):
+    plugin_class = entrypoint.load()
+    plugin = plugin_class()
+    INSTALLED_APPS += tuple(plugin.get_applications())
+
+
+
 # From http://django-crispy-forms.readthedocs.org/en/d-0/install.html
 CRISPY_TEMPLATE_PACK = 'bootstrap'
 

polynum/urls.py

@@ -1,3 +1,5 @@
+import pkg_resources
+
 from django.conf import settings
 from django.conf.urls import patterns, include, url
 from django.core.urlresolvers import reverse_lazy
@@ -19,8 +21,22 @@ request_decorator = combine_decorators(
         user_passes_test(user_has_validated_cgu,
             login_url=reverse_lazy('cgu-view')))
 
+# Load plugin applications
+after_urls = []
+before_urls = []
 
-urlpatterns = patterns('',
+for entrypoint in pkg_resources.iter_entry_points('polynum_plugin'):
+    plugin_class = entrypoint.load()
+    plugin = plugin_class()
+    for after, urls in plugin.get_urls():
+        if after:
+            after_urls.append(url(r'^', include(urls)))
+        else:
+            before_urls.append(url(r'^', include(urls)))
+
+urlpatterns = patterns('', *before_urls)
+
+urlpatterns += patterns('',
     # Uncomment the admin/doc line below to enable admin documentation:
     # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
 
@@ -64,3 +80,4 @@ urlpatterns += patterns('',
 }),
 )
 
+urlpatterns += patterns('', *after_urls)