Better variable naming for user in complete

The user variable was being re-assigned based on itself multiple times. In reality there are 3 variables here: The user we pass to the function, the user we pass into the pipeline and the user we get back out of the pipeline. These are 3 separate variables (it just so happens that we don't care about the old one once we create the new one). Separating the variables out into three makes it much clearer what is going on with the pipeline.

Made a similar name change for the added user_authenticated variable.

social_core/actions.py

@@ -33,16 +33,16 @@ def do_complete(backend, login, user=None, redirect_name='next',
                 *args, **kwargs):
     data = backend.strategy.request_data()
 
-    is_authenticated = user_is_authenticated(user)
-    user = user if is_authenticated else None
+    is_authenticated_pre_pipeline = user_is_authenticated(user)
+    pre_pipeline_user = user if is_authenticated else None
 
-    partial = partial_pipeline_data(backend, user, *args, **kwargs)
+    partial = partial_pipeline_data(backend, pre_pipeline_user, *args, **kwargs)
     if partial:
-        user = backend.continue_pipeline(partial)
+        post_pipeline_user = backend.continue_pipeline(partial)
         # clean partial data after usage
         backend.strategy.clean_partial_pipeline(partial.token)
     else:
-        user = backend.complete(user=user, *args, **kwargs)
+        post_pipeline_user = backend.complete(user=pre_pipeline_user, *args, **kwargs)
 
     # pop redirect value before the session is trashed on login(), but after
     # the pipeline so that the pipeline can change the redirect if needed
@@ -52,23 +52,23 @@ def do_complete(backend, login, user=None, redirect_name='next',
     # check if the output value is something else than a user and just
     # return it to the client
     user_model = backend.strategy.storage.user.user_model()
-    if user and not isinstance(user, user_model):
-        return user
+    if post_pipeline_user and not isinstance(post_pipeline_user, user_model):
+        return post_pipeline_user
 
-    is_authenticated = user_is_authenticated(user)
+    is_authenticated_post_pipeline = user_is_authenticated(post_pipeline_user)
     if is_authenticated:
-        if not user:
+        if not post_pipeline_user:
             url = setting_url(backend, redirect_value, 'LOGIN_REDIRECT_URL')
         else:
             url = setting_url(backend, redirect_value,
                               'NEW_ASSOCIATION_REDIRECT_URL',
                               'LOGIN_REDIRECT_URL')
-    elif user:
-        if user_is_active(user):
+    elif post_pipeline_user:
+        if user_is_active(post_pipeline_user):
             # catch is_new/social_user in case login() resets the instance
-            is_new = getattr(user, 'is_new', False)
-            social_user = user.social_user
-            login(backend, user, social_user)
+            is_new = getattr(post_pipeline_user, 'is_new', False)
+            social_user = post_pipeline_user.social_user
+            login(backend, post_pipeline_user, social_user)
             # store last login backend name in session
             backend.strategy.session_set('social_auth_last_login_backend',
                                          social_user.provider)
@@ -83,8 +83,8 @@ def do_complete(backend, login, user=None, redirect_name='next',
                                   'LOGIN_REDIRECT_URL')
         else:
             if backend.setting('INACTIVE_USER_LOGIN', False):
-                social_user = user.social_user
-                login(backend, user, social_user)
+                social_user = post_pipeline_user.social_user
+                login(backend, post_pipeline_user, social_user)
             url = setting_url(backend, 'INACTIVE_USER_URL', 'LOGIN_ERROR_URL',
                               'LOGIN_URL')
     else: