Future-proof for django 4.0

Minor changes to make the code compatible with django 4.0

Note that we can't actually upgrade to django 4.0 because that requires
python 3.8, and www.eleves only has python 3.7, so we need to upgrade
www.eleves first.

WikiENS/settings/common.py

@@ -7,9 +7,12 @@ from django.contrib.messages import constants as messages
 try:
     from . import secret
 except ImportError:
+    import pathlib
+    dir_path = pathlib.Path(__file__).parent.resolve().as_posix()
     raise ImportError(
         "The secret.py file is missing.\n"
-        "For a development environment, simply copy secret_example.py"
+        "For a development environment, simply copy secret_example.py:\n"
+        f" $ cp {dir_path}/{{secret_example,secret}}.py"
     )
 
 

WikiENS/urls.py

@@ -1,23 +1,22 @@
-from django.conf.urls import url, include
+from django.conf.urls import include
+from django.urls import re_path
 from django.contrib import admin
 
 from allauth_ens.views import capture_login, capture_logout
-from wiki.urls import get_pattern as get_wiki_pattern
-from django_nyt.urls import get_pattern as get_nyt_pattern
 
 allauth_urls = [
     # Catch login/logout views of admin site.
-    url(r'^_admin/login/$', capture_login),
-    url(r'^_admin/logout/$', capture_logout),
+    re_path(r'^_admin/login/$', capture_login),
+    re_path(r'^_admin/logout/$', capture_logout),
     # Allauth urls.
-    url(r'^_profil/', include('allauth.urls')),
+    re_path(r'^_profil/', include('allauth.urls')),
 ]
 
 urlpatterns = allauth_urls + [
-    url(r'^_admin/', admin.site.urls),
-    url(r'^notifications/', get_nyt_pattern()),
-    url(r'^_groups/', include("wiki_groups.urls")),
-    url(r'', get_wiki_pattern()),
+    re_path(r'^_admin/', admin.site.urls),
+    re_path(r'^notifications/', include('django_nyt.urls')),
+    re_path(r'^_groups/', include("wiki_groups.urls")),
+    re_path(r'', include('wiki.urls')),
 ]
 
 # TODO add MEDIA_ROOT

wiki_groups/__init__.py

@@ -1 +0,0 @@
-default_app_config = "wiki_groups.apps.WikiGroupsConfig"