Make include_x inheritance more congruent with docs (#32769)

* draft making tags congruent with include_x

* remove ability to 'inline tags' for new inc keys

* generic inheritance

* fix typo

* pepe

lib/ansible/playbook/base.py

@@ -165,6 +165,8 @@ class Base(with_metaclass(BaseMeta, object)):
         'su', 'su_user', 'su_pass', 'su_exe', 'su_flags',
     ]
 
+    _inheritable = True
+
     def __init__(self):
 
         # initialize the data loader and variable manager, which will be provided

lib/ansible/playbook/helpers.py

@@ -249,6 +249,7 @@ def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_h
                         variable_manager=variable_manager,
                     )
 
+                    # FIXME: remove once 'include' is removed
                     # pop tags out of the include args, if they were specified there, and assign
                     # them to the include. If the include already had tags specified, we raise an
                     # error so that users know not to specify them both ways
@@ -257,6 +258,8 @@ def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_h
                         tags = tags.split(',')
 
                     if len(tags) > 0:
+                        if 'include_tasks' in task_ds or 'import_tasks' in task_ds:
+                            raise AnsibleParserError('You cannot specify "tags" inline to the task, it is a task keyword')
                         if len(ti_copy.tags) > 0:
                             raise AnsibleParserError(
                                 "Include tasks should not specify tags in more than one way (both via args and directly on the task). "

lib/ansible/playbook/role_include.py

@@ -48,6 +48,8 @@ class IncludeRole(TaskInclude):
     OTHER_ARGS = ('private', 'allow_duplicates')  # assigned to matching property
     VALID_ARGS = tuple(frozenset(BASE + FROM_ARGS + OTHER_ARGS))  # all valid args
 
+    _inheritable = False
+
     # =================================================================================
     # ATTRIBUTES
 

lib/ansible/playbook/taggable.py

@@ -49,11 +49,9 @@ class Taggable:
 
     def _get_attr_tags(self):
         '''
-        Override for the 'tags' getattr fetcher, used from Base.
+        Override for the 'tags' getattr fetcher, used from Base, allow some classes to not give their tags to their 'children'
         '''
-        tags = self._attributes['tags']
+        tags = self._attributes.get('tags', [])
-        if tags is None:
-            tags = []
         if hasattr(self, '_get_parent_attribute'):
             tags = self._get_parent_attribute('tags', extend=True)
         return tags

lib/ansible/playbook/task.py

@@ -420,7 +420,12 @@ class Task(Base, Conditional, Taggable, Become):
             value = self._attributes[attr]
             if self._parent and (value is None or extend):
                 if attr != 'when' or getattr(self._parent, 'statically_loaded', True):
-                    parent_value = getattr(self._parent, attr, None)
+                    # vars are always inheritable, other attributes might not be for the partent but still should be for other ancestors
+                    if attr != 'vars' and not getattr(self._parent, '_inheritable', True) and hasattr(self._parent, '_get_parent_attribute'):
+                        parent_value = self._parent._get_parent_attribute(attr, extend=extend, prepend=prepend)
+                    else:
+                        parent_value = getattr(self._parent, attr, None)
+
                     if extend:
                         value = self._extend_value(value, parent_value, prepend)
                     else:

lib/ansible/playbook/task_include.py

@@ -50,6 +50,8 @@ class TaskInclude(Task):
     @staticmethod
     def load(data, block=None, role=None, task_include=None, variable_manager=None, loader=None):
         t = TaskInclude(block=block, role=role, task_include=task_include)
+        if t.action == 'include_task':
+            t._inheritable = False
         return t.load_data(data, variable_manager=variable_manager, loader=loader)
 
     def copy(self, exclude_parent=False, exclude_tasks=False):