Allow plugins to register via setuptools, allow for invisible plugins

src/pretix/control/views/event.py

@@ -96,7 +96,8 @@ class EventPlugins(EventPermissionRequiredMixin, TemplateView, SingleObjectMixin
         from pretix.base.plugins import get_all_plugins
 
         context = super().get_context_data(*args, **kwargs)
-        context['plugins'] = [p for p in get_all_plugins() if not p.name.startswith('.')]
+        context['plugins'] = [p for p in get_all_plugins() if not p.name.startswith('.')
+                              if getattr(p, 'visible', True)]
         context['plugins_active'] = self.object.get_plugins()
         return context
 

src/pretix/settings.py

@@ -6,6 +6,7 @@ import django.conf.locale
 from django.contrib.messages import constants as messages  # NOQA
 from django.utils.crypto import get_random_string
 from django.utils.translation import ugettext_lazy as _  # NOQA
+from pkg_resources import iter_entry_points
 
 config = configparser.ConfigParser()
 config.read(['/etc/pretix/pretix.cfg', os.path.expanduser('~/.pretix.cfg'), 'pretix.cfg'],
@@ -160,6 +161,9 @@ INSTALLED_APPS = [
     'easy_thumbnails'
 ]
 
+for entry_point in iter_entry_points(group='pretix.plugin', name=None):
+    INSTALLED_APPS.append(entry_point.module_name)
+
 MIDDLEWARE_CLASSES = [
     'pretix.multidomain.middlewares.MultiDomainMiddleware',
     'pretix.multidomain.middlewares.SessionMiddleware',