do not require South package to be installed when it is not present in INSTALLED_APPS

weblate/accounts/models.py

@@ -33,7 +33,6 @@ from django.utils import translation as django_translation
 from django.template.loader import render_to_string
 from django.core.mail import EmailMultiAlternatives
 
-from south.signals import post_migrate
 from social.apps.django_app.default.models import UserSocialAuth
 
 from weblate.lang.models import Language
@@ -706,8 +705,6 @@ def remove_user(user):
     user.social_auth.all().delete()
 
 
-@receiver(post_syncdb)
-@receiver(post_migrate)
 def sync_create_groups(sender, app, **kwargs):
     '''
     Create groups on syncdb.
@@ -716,6 +713,11 @@ def sync_create_groups(sender, app, **kwargs):
             or getattr(app, '__name__', '') == 'weblate.accounts.models'):
         create_groups(False)
 
+post_syncdb.connect(sync_create_groups)
+if 'south' in settings.INSTALLED_APPS:
+    from south.signals import post_migrate
+    post_migrate.connect(sync_create_groups)
+
 
 @receiver(post_save, sender=User)
 def create_profile_callback(sender, instance, created=False, **kwargs):

weblate/lang/models.py

@@ -25,9 +25,8 @@ from translate.lang.data import languages
 from weblate.lang import data
 from weblate.trans.mixins import PercentMixin
 
-from south.signals import post_migrate
+from django.conf import settings
 from django.db.models.signals import post_syncdb
-from django.dispatch import receiver
 from weblate.appsettings import SIMPLIFY_LANGUAGES
 import weblate
 
@@ -288,8 +287,6 @@ class LanguageManager(models.Manager):
         return errors
 
 
-@receiver(post_syncdb)
-@receiver(post_migrate)
 def setup_lang(sender, app, **kwargs):
     '''
     Hook for creating basic set of languages on database migration.
@@ -297,6 +294,11 @@ def setup_lang(sender, app, **kwargs):
     if app == 'lang' or getattr(app, '__name__', '') == 'weblate.lang.models':
         Language.objects.setup(False)
 
+post_syncdb.connect(setup_lang)
+if 'south' in settings.INSTALLED_APPS:
+    from south.signals import post_migrate
+    post_migrate.connect(setup_lang)
+
 
 class Language(models.Model, PercentMixin):
     PLURAL_CHOICES = (

weblate/requirements.py

@@ -24,6 +24,7 @@ from distutils.version import LooseVersion
 from weblate.trans.vcs import GitRepository
 import importlib
 import sys
+import django
 
 
 def get_version_module(module, name, url, optional=False):
@@ -139,13 +140,14 @@ def get_versions():
 
     name = 'South'
     url = 'http://south.aeracode.org/'
-    mod = get_version_module('south', name, url)
-    result.append((
-        name,
-        url,
-        mod.__version__,
-        '1.0',
-    ))
+    if django.VERSION < (1, 7, 0):
+        mod = get_version_module('south', name, url)
+        result.append((
+            name,
+            url,
+            mod.__version__,
+            '1.0',
+        ))
 
     name = 'Pillow (PIL)'
     url = 'http://python-imaging.github.io/'

weblate/trans/__init__.py

@@ -18,11 +18,9 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-from south.signals import post_migrate
-from django.dispatch import receiver
+from django.conf import settings
 
 
-@receiver(post_migrate)
 def create_permissions_compat(app, **kwargs):
     '''
     Creates permissions like syncdb would if we were not using South
@@ -30,7 +28,6 @@ def create_permissions_compat(app, **kwargs):
     See http://south.aeracode.org/ticket/211
     '''
     from django.db.models import get_app, get_models
-    from django.conf import settings
     from django.contrib.auth.management import create_permissions
     if app in ('trans', 'lang', 'accounts'):
         try:
@@ -40,3 +37,7 @@ def create_permissions_compat(app, **kwargs):
         except AttributeError as error:
             # See https://code.djangoproject.com/ticket/20442
             print 'Failed to create permission objects: {0}'.format(error)
+
+if 'south' in settings.INSTALLED_APPS:
+    from south.signals import post_migrate
+    post_migrate.connect(create_permissions_compat)