Fixed #14130 -- Made manage.py error reporting more useful when the settings.py…

Fixed #14130 -- Made manage.py error reporting more useful when the settings.py file triggers import errors (in new projects). Thanks Setok for the report, mk and steph for their work.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15522 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/conf/project_template/manage.py

 #!/usr/bin/env python
 from django.core.management import execute_manager
+import imp
 try:
-    import settings # Assumed to be in the same directory.
+    imp.find_module('settings') # Assumed to be in the same directory.
 except ImportError:
     import sys
-    sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n(If the file settings.py does indeed exist, it's causing an ImportError somehow.)\n" % __file__)
+    sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n" % __file__)
     sys.exit(1)
 
+import settings
+
 if __name__ == "__main__":
     execute_manager(settings)

tests/regressiontests/admin_scripts/tests.py

@@ -958,6 +958,35 @@ class ManageMultipleSettings(AdminScriptTestCase):
         self.assertNoOutput(out)
         self.assertOutput(err, "Unknown command: 'noargs_command'")
 
+class ManageSettingsWithImportError(AdminScriptTestCase):
+    """Tests for manage.py when using the default settings.py file
+    with an import error. Ticket #14130.
+    """
+    def setUp(self):
+        self.write_settings_with_import_error('settings.py')
+
+    def tearDown(self):
+        self.remove_settings('settings.py')
+
+    def write_settings_with_import_error(self, filename, apps=None, is_dir=False, sdict=None):
+        test_dir = os.path.dirname(os.path.dirname(__file__))
+        if is_dir:
+            settings_dir = os.path.join(test_dir,filename)
+            os.mkdir(settings_dir)
+            settings_file = open(os.path.join(settings_dir,'__init__.py'), 'w')
+        else:
+            settings_file = open(os.path.join(test_dir, filename), 'w')
+        settings_file.write('# Settings file automatically generated by regressiontests.admin_scripts test case\n')
+        settings_file.write('# The next line will cause an import error:\nimport foo42bar\n')
+
+        settings_file.close()
+
+    def test_builtin_command(self):
+        "import error: manage.py builtin commands shows useful diagnostic info when settings with import errors is provided"
+        args = ['sqlall','admin_scripts']
+        out, err = self.run_manage(args)
+        self.assertNoOutput(out)
+        self.assertOutput(err, "ImportError: No module named foo42bar")
 
 class ManageValidate(AdminScriptTestCase):
     def tearDown(self):