Fix task.resolved_action callbacks (#82003)

* Fix task.resolved_action for callbacks when playbooks use action or local_action

* Fix using module_defaults with 'action' and 'local_action' task FA and add a test case

Fixes #81905

changelogs/fragments/correct-callback-fqcn-old-style-action-invocation.yml

@@ -0,0 +1,3 @@
+bugfixes:
+  - Fix the task attribute ``resolved_action`` to show the FQCN instead of ``None`` when ``action`` or ``local_action`` is used in the playbook.
+  - Fix using ``module_defaults`` with ``local_action``/``action`` (https://github.com/ansible/ansible/issues/81905).

lib/ansible/parsing/mod_args.py

@@ -53,6 +53,17 @@ BUILTIN_TASKS = frozenset(add_internal_fqcns((
 )))
 
 
+def _get_action_context(action_or_module, collection_list):
+    module_context = module_loader.find_plugin_with_context(action_or_module, collection_list=collection_list)
+    if module_context and module_context.resolved and module_context.action_plugin:
+        action_or_module = module_context.action_plugin
+
+    context = action_loader.find_plugin_with_context(action_or_module, collection_list=collection_list)
+    if not context or not context.resolved:
+        context = module_context
+    return context
+
+
 class ModuleArgsParser:
 
     """
@@ -291,6 +302,11 @@ class ModuleArgsParser:
             delegate_to = 'localhost'
             action, args = self._normalize_parameters(thing, action=action, additional_args=additional_args)
 
+        if action is not None and not skip_action_validation:
+            context = _get_action_context(action, self._collection_list)
+            if context is not None and context.resolved:
+                self.resolved_action = context.resolved_fqcn
+
         # module: <stuff> is the more new-style invocation
 
         # filter out task attributes so we're only querying unrecognized keys as actions/modules
@@ -306,9 +322,7 @@ class ModuleArgsParser:
                 is_action_candidate = True
             else:
                 try:
-                    context = action_loader.find_plugin_with_context(item, collection_list=self._collection_list)
+                    context = _get_action_context(item, self._collection_list)
-                    if not context.resolved:
-                        context = module_loader.find_plugin_with_context(item, collection_list=self._collection_list)
                 except AnsibleError as e:
                     if e.obj is None:
                         e.obj = self._task_ds

lib/ansible/playbook/task.py

@@ -208,6 +208,7 @@ class Task(Base, Conditional, Taggable, CollectionSearch, Notifiable, Delegatabl
             # But if it wasn't, we can add the yaml object now to get more detail
             raise AnsibleParserError(to_native(e), obj=ds, orig_exc=e)
         else:
+            # Set the resolved action plugin (or if it does not exist, module) for callbacks.
             self.resolved_action = args_parser.resolved_action
 
         # the command/shell/script modules used to support the `cmd` arg,

test/integration/targets/collections/test_task_resolved_plugin/unqualified_and_collections_kw.yml

@@ -10,5 +10,7 @@
     - ping:
     - collection_action:
     - collection_module:
-    - formerly_action:
+    - local_action:
-    - formerly_module:
+        module: formerly_action
+    - action:
+        module: formerly_module

test/integration/targets/module_defaults/tasks/main.yml

@@ -10,16 +10,23 @@
     - debug:
       register: foo
 
+    - local_action:
+        module: debug
+      register: local_action_foo
+
     - name: test that 'debug' task used default 'msg' param
       assert:
-        that: foo.msg == "test default"
+        that:
+          - foo.msg == "test default"
+          - local_action_foo.msg == "test default"
 
     - name: remove test file
       file:
         state: absent
 
     - name: touch test file
-      file:
+      local_action:
+        module: file
         state: touch
 
     - name: stat test file

test/units/playbook/test_block.py

@@ -20,6 +20,10 @@ from __future__ import annotations
 import unittest
 from ansible.playbook.block import Block
 from ansible.playbook.task import Task
+from ansible.plugins.loader import init_plugin_loader
+
+
+init_plugin_loader()
 
 
 class TestBlock(unittest.TestCase):

test/units/playbook/test_helpers.py

@@ -24,13 +24,16 @@ from unittest.mock import MagicMock
 from units.mock.loader import DictDataLoader
 
 from ansible import errors
+from ansible.playbook import helpers
 from ansible.playbook.block import Block
 from ansible.playbook.handler import Handler
 from ansible.playbook.task import Task
 from ansible.playbook.task_include import TaskInclude
 from ansible.playbook.role.include import RoleInclude
+from ansible.plugins.loader import init_plugin_loader
 
-from ansible.playbook import helpers
+
+init_plugin_loader()
 
 
 class MixinForMocks(object):