Suppress invalid-name for wsgi application. Fix #77

Author: atodorov

pylint_django/augmentations/__init__.py

@@ -700,6 +700,12 @@ def wrap_func(*args, **kwargs):
     return wrap_func
 
 
+def is_wsgi_application(node):
+    frame = node.frame()
+    return node.name == 'application' and isinstance(frame, Module) and \
+        (frame.name == 'wsgi' or frame.path.endswith('wsgi.py') or frame.file.endswith('wsgi.py'))
+
+
 # The names of some visit functions changed in this commit:
 # https://bitbucket.org/logilab/pylint/commits/c94ee95abaa5737f13b91626fe321150c0ddd140
 
@@ -822,3 +828,6 @@ def apply_augmentations(linter):
 
     # supress not-an-iterable for model_utils.managers. See #117
     suppress_message(linter, IterableChecker._check_iterable, 'not-an-iterable', is_model_manager)
+
+    # wsgi.py
+    suppress_message(linter, _visit_assignname(NameChecker), 'invalid-name', is_wsgi_application)

pylint_django/tests/input/func_noerror_wsgi.py

@@ -0,0 +1,15 @@
+"""
+Standard WSGI config created by django-admin startproject.
+
+Used to verify pylint_django doesn't produce invalid-name for
+the application variable. See:
+https://github.com/PyCQA/pylint-django/issues/77
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "testproj.settings")
+
+application = get_wsgi_application()