Differently handle intermediate signals we trigger to create permissions

We need Django to generate permissions, but we can not yet execute own
code as all migrations are not yet applied. This can be removed once
new permissions (#1798) are implemented.

Issue #1838

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/lang/models.py

@@ -327,9 +327,9 @@ def have_translation(self):
 
 
 @receiver(post_migrate)
-def setup_lang(sender, **kwargs):
+def setup_lang(sender, intermediate=False, **kwargs):
     """Hook for creating basic set of languages on database migration."""
-    if sender.label == 'lang':
+    if not intermediate and sender.label == 'lang':
         with transaction.atomic():
             Language.objects.setup(False)
 

weblate/permissions/migrations/0006_auto_20170404_1637.py

@@ -16,7 +16,7 @@ def migrate_acl(apps, schema_editor):
 
     # Workaround to ensure the permission added in 0083_auto_20170404_1633
     # is actually created, see https://code.djangoproject.com/ticket/23422
-    emit_post_migrate_signal(0, False, schema_editor.connection.alias)
+    emit_post_migrate_signal(0, False, schema_editor.connection.alias, intermediate=True)
 
     groups = {}
     all_perms = Permission.objects.filter(codename__in=ADMIN_PERMS)

weblate/permissions/models.py

@@ -174,8 +174,10 @@ def move_users():
 
 
 @receiver(post_migrate)
-def sync_create_groups(sender, **kwargs):
+def sync_create_groups(sender, intermediate=False, **kwargs):
     """Create groups on syncdb."""
+    if intermediate:
+        return
     # Figure out last app in signals
     for app_config in apps.get_app_configs():
         if app_config.models_module is None:

weblate/trans/migrations/0085_auto_20170406_0904.py

@@ -9,7 +9,7 @@
 def add_perm(apps, schema_editor):
     # Workaround to ensure the permission added in 0084_auto_20170406_0858
     # is actually created, see https://code.djangoproject.com/ticket/23422
-    emit_post_migrate_signal(0, False, schema_editor.connection.alias)
+    emit_post_migrate_signal(0, False, schema_editor.connection.alias, intermediate=True)
 
     GroupACL = apps.get_model('permissions', 'GroupACL')
     Group = apps.get_model('auth', 'Group')