More informative playbook attribute errors (#77082)

* More informative playbook attribute errors

Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>

changelogs/fragments/more_targeted_attribute_errors.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - playbook/strategy have more informative 'attribute' based errors for playbook objects and handlers.

lib/ansible/playbook/base.py

@@ -16,10 +16,9 @@ from jinja2.exceptions import UndefinedError
 
 from ansible import constants as C
 from ansible import context
-from ansible.errors import AnsibleError
+from ansible.errors import AnsibleError, AnsibleParserError, AnsibleUndefinedVariable, AnsibleAssertionError
 from ansible.module_utils.six import string_types
 from ansible.module_utils.parsing.convert_bool import boolean
-from ansible.errors import AnsibleParserError, AnsibleUndefinedVariable, AnsibleAssertionError
 from ansible.module_utils._text import to_text, to_native
 from ansible.parsing.dataloader import DataLoader
 from ansible.playbook.attribute import Attribute, FieldAttribute
@@ -36,7 +35,7 @@ def _generic_g(prop_name, self):
     try:
         value = self._attributes[prop_name]
     except KeyError:
-        raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
+        raise AttributeError("'%s' does not have the keyword '%s'" % (self.__class__.__name__, prop_name))
 
     if value is Sentinel:
         value = self._attr_defaults[prop_name]
@@ -51,7 +50,7 @@ def _generic_g_method(prop_name, self):
         method = "_get_attr_%s" % prop_name
         return getattr(self, method)()
     except KeyError:
-        raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
+        raise AttributeError("'%s' does not support the keyword '%s'" % (self.__class__.__name__, prop_name))
 
 
 def _generic_g_parent(prop_name, self):
@@ -64,7 +63,7 @@ def _generic_g_parent(prop_name, self):
             except AttributeError:
                 value = self._attributes[prop_name]
     except KeyError:
-        raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
+        raise AttributeError("'%s' nor it's parents support the keyword '%s'" % (self.__class__.__name__, prop_name))
 
     if value is Sentinel:
         value = self._attr_defaults[prop_name]
@@ -146,12 +145,15 @@ class BaseMeta(type):
                     # method, or if the attribute is marked as not inheriting
                     # its value from a parent object
                     method = "_get_attr_%s" % attr_name
+                    try:
                         if method in src_dict or method in dst_dict:
                             getter = partial(_generic_g_method, attr_name)
                         elif ('_get_parent_attribute' in dst_dict or '_get_parent_attribute' in src_dict) and value.inherit:
                             getter = partial(_generic_g_parent, attr_name)
                         else:
                             getter = partial(_generic_g, attr_name)
+                    except AttributeError as e:
+                        raise AnsibleParserError("Invalid playbook definition: %s" % to_native(e), orig_exc=e)
 
                     setter = partial(_generic_s, attr_name)
                     deleter = partial(_generic_d, attr_name)

lib/ansible/plugins/strategy/__init__.py

@@ -26,6 +26,7 @@ import pprint
 import sys
 import threading
 import time
+import traceback
 
 from collections import deque
 from multiprocessing import Lock
@@ -42,7 +43,7 @@ from ansible.executor.process.worker import WorkerProcess
 from ansible.executor.task_result import TaskResult
 from ansible.executor.task_queue_manager import CallbackSend
 from ansible.module_utils.six import string_types
-from ansible.module_utils._text import to_text
+from ansible.module_utils._text import to_text, to_native
 from ansible.module_utils.connection import Connection, ConnectionError
 from ansible.playbook.conditional import Conditional
 from ansible.playbook.handler import Handler
@@ -1037,10 +1038,14 @@ class StrategyBase:
             #        but this may take some work in the iterator and gets tricky when
             #        we consider the ability of meta tasks to flush handlers
             for handler in handler_block.block:
+                try:
                     if handler.notified_hosts:
                         result = self._do_handler_run(handler, handler.get_name(), iterator=iterator, play_context=play_context)
                         if not result:
                             break
+                except AttributeError as e:
+                    display.vvv(traceback.format_exc())
+                    raise AnsibleParserError("Invalid handler definition for '%s'" % (handler.get_name()), orig_exc=e)
         return result
 
     def _do_handler_run(self, handler, handler_name, iterator, play_context, notified_hosts=None):