From 429e1a41dcb7f6e39208053bbd837ee307347ad8 Mon Sep 17 00:00:00 2001
From: Mike Bryant <mike@mikebryant.me.uk>
Date: Fri, 4 Dec 2015 14:44:50 +0000
Subject: [PATCH] Try to detect the autoconfig module without importing the
 app, and hence triggering imports in apps that don't support autoconfig.
 Fixes #23

---
 django_autoconfig/autoconfig.py            | 26 ++++++++++++----------
 django_autoconfig/tests/test_autoconfig.py |  9 --------
 2 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/django_autoconfig/autoconfig.py b/django_autoconfig/autoconfig.py
index 0f6cfd9..f8d4511 100644
--- a/django_autoconfig/autoconfig.py
+++ b/django_autoconfig/autoconfig.py
@@ -7,6 +7,7 @@
 from django.conf.urls import include, patterns, url
 from django.utils.functional import Promise
 from django.utils.module_loading import module_has_submodule
+import imp
 import importlib
 import operator
 
@@ -15,13 +16,6 @@
 
 MAX_ITERATIONS = 1000
 
-SETTINGS = {
-    'AUTOCONFIG_DISABLED_APPS': [
-        'django.contrib.admin',
-        'django.contrib.auth',
-    ],
-}
-
 class OrderingRelationship(object):
     '''
     This class defines a relationship between an element in a setting
@@ -144,6 +138,18 @@ def merge_dictionaries(current, new, only_defaults=False, template_special_case=
                 changes += 1
     return changes
 
+def autoconfig_module_exists(app_name):
+    names = app_name.split('.')
+    path = None
+    for name in names:
+        _, path, _ = imp.find_module(name, path)
+        path = [path]
+    try:
+        imp.find_module('autoconfig', path)
+        return True
+    except ImportError:
+        return False
+
 def configure_settings(settings, environment_settings=True):
     '''
     Given a settings object, run automatic configuration of all
@@ -158,12 +164,8 @@ def configure_settings(settings, environment_settings=True):
         if environment_settings:
             app_names.append('django_autoconfig.environment_settings')
         for app_name in app_names:
-            if app_name not in settings.get('AUTOCONFIG_DISABLED_APPS', ()):
-                app_module = importlib.import_module(app_name)
-            else:
-                app_module = None
             import django_autoconfig.contrib
-            if app_module and module_has_submodule(app_module, 'autoconfig'):
+            if autoconfig_module_exists(app_name):
                 module = importlib.import_module("%s.autoconfig" % (app_name,))
             elif app_name in django_autoconfig.contrib.CONTRIB_CONFIGS:
                 module = django_autoconfig.contrib.CONTRIB_CONFIGS[app_name]
diff --git a/django_autoconfig/tests/test_autoconfig.py b/django_autoconfig/tests/test_autoconfig.py
index 9261489..1f69366 100644
--- a/django_autoconfig/tests/test_autoconfig.py
+++ b/django_autoconfig/tests/test_autoconfig.py
@@ -141,15 +141,6 @@ def test_importerror_from_import_error(self):
             autoconfig.configure_settings(self.settings_dict)
         self.assertIn('flibble', str(exception_manager.exception))
 
-    def test_disabled_autoconfig(self):
-        '''
-        Test the ability to disable autoconfig for some apps.
-        '''
-        self.settings_dict['INSTALLED_APPS'] = ['django_autoconfig.tests.app_list']
-        self.settings_dict['AUTOCONFIG_DISABLED_APPS'] = ['django_autoconfig.tests.app_list']
-        autoconfig.configure_settings(self.settings_dict)
-        self.assertEqual(self.settings_dict['LIST_SETTING'], [1, 2])
-
     def test_contrib_autoconfig(self):
         '''
         Test autoconfig provided by us instead of the app.