Add default_without_diff callback (#7949)

* Add default_without_diff callback.

* Add examples and BOTMETA entry.

.github/BOTMETA.yml

@@ -50,6 +50,8 @@ files:
   $callbacks/cgroup_memory_recap.py: {}
   $callbacks/context_demo.py: {}
   $callbacks/counter_enabled.py: {}
+  $callbacks/default_without_diff.py:
+    maintainers: felixfontein
   $callbacks/dense.py:
     maintainers: dagwieers
   $callbacks/diy.py:

plugins/callback/default_without_diff.py

@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2024, Felix Fontein <felix@fontein.de>
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+DOCUMENTATION = r'''
+  name: default_without_diff
+  type: stdout
+  short_description: The default ansible callback without diff output
+  version_added: 8.4.0
+  description:
+    - This is basically the default ansible callback plugin (P(ansible.builtin.default#callback)) without
+      showing diff output. This can be useful when using another callback which sends more detailed information
+      to another service, like the L(ARA, https://ara.recordsansible.org/) callback, and you want diff output
+      sent to that plugin but not shown on the console output.
+  author: Felix Fontein (@felixfontein)
+  extends_documentation_fragment:
+    - ansible.builtin.default_callback
+    - ansible.builtin.result_format_callback
+'''
+
+EXAMPLES = r'''
+# Enable callback in ansible.cfg:
+ansible_config: |
+  [defaults]
+  stdout_callback = community.general.default_without_diff
+
+# Enable callback with environment variables:
+environment_variable: |
+  ANSIBLE_STDOUT_CALLBACK=community.general.default_without_diff
+'''
+
+from ansible.plugins.callback.default import CallbackModule as Default
+
+
+class CallbackModule(Default):
+    CALLBACK_VERSION = 2.0
+    CALLBACK_TYPE = 'stdout'
+    CALLBACK_NAME = 'community.general.default_without_diff'
+
+    def v2_on_file_diff(self, result):
+        pass

tests/integration/targets/callback_default_without_diff/aliases

@@ -0,0 +1,6 @@
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+azp/posix/3
+needs/target/callback

tests/integration/targets/callback_default_without_diff/tasks/main.yml

@@ -0,0 +1,65 @@
+---
+####################################################################
+# WARNING: These are designed specifically for Ansible tests       #
+# and should not be used as examples of how to write Ansible roles #
+####################################################################
+
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+- block:
+    - name: Create temporary file
+      tempfile:
+      register: tempfile
+
+    - name: Run tests
+      include_role:
+        name: callback
+      vars:
+        tests:
+          - name: Basic file diff
+            environment:
+              ANSIBLE_NOCOLOR: 'true'
+              ANSIBLE_FORCE_COLOR: 'false'
+              ANSIBLE_DIFF_ALWAYS: 'true'
+              ANSIBLE_PYTHON_INTERPRETER: "{{ ansible_python_interpreter }}"
+              ANSIBLE_STDOUT_CALLBACK: community.general.default_without_diff
+            playbook: |
+              - hosts: testhost
+                gather_facts: true
+                tasks:
+                  - name: Create file
+                    copy:
+                      dest: "{{ tempfile.path }}"
+                      content: |
+                        Foo bar
+
+                  - name: Modify file
+                    copy:
+                      dest: "{{ tempfile.path }}"
+                      content: |
+                        Foo bar
+                        Bar baz bam!
+            expected_output: [
+              "",
+              "PLAY [testhost] ****************************************************************",
+              "",
+              "TASK [Gathering Facts] *********************************************************",
+              "ok: [testhost]",
+              "",
+              "TASK [Create file] *************************************************************",
+              "changed: [testhost]",
+              "",
+              "TASK [Modify file] *************************************************************",
+              "changed: [testhost]",
+              "",
+              "PLAY RECAP *********************************************************************",
+              "testhost                   : ok=3    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   ",
+            ]
+
+  always:
+    - name: Clean up temp file
+      file:
+        path: "{{ tempfile.path }}"
+        state: absent