Fun with callbacks (#32031)

* Functional-ish unix-ish callback plugin

* fix var

* Don't display include or include_vars

* Correctly display debug output and failed output in loops

* Linter fixes, documentation, and GPL oneliner

lib/ansible/plugins/callback/unixy.py

@@ -0,0 +1,198 @@
+# Copyright: (c) 2017, Allyson Bowles <@akatch>
+# Copyright: (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+DOCUMENTATION = '''
+    callback: unixy
+    type: stdout
+    short_description: condensed Ansible output
+    version_added: 2.5
+    description:
+      - Consolidated Ansible output in the style of *NIX startup logs
+    extends_documentation_fragment:
+      - default_callback
+    requirements:
+      - set as stdout in configuration
+'''
+
+from ansible.plugins.callback import CallbackBase
+from ansible.utils.color import colorize, hostcolor
+from ansible import constants as C
+from os.path import basename
+
+
+class CallbackModule(CallbackBase):
+
+    '''
+    Design goals:
+    - Print consolidated output that looks like a *NIX startup log
+    - Defaults should avoid displaying unnecessary information wherever possible
+
+    TODOs:
+    - Only display task names if the task runs on at least one host
+    - Add option to display all hostnames on a single line in the appropriate result color (failures may have a separate line)
+    - Consolidate stats display
+    - Display whether run is in --check mode
+    - Don't show play name if no hosts found
+    '''
+
+    CALLBACK_VERSION = 2.0
+    CALLBACK_TYPE = 'stdout'
+    CALLBACK_NAME = 'unixy'
+
+    def _run_is_verbose(self, result):
+        return ((self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and '_ansible_verbose_override' not in result._result)
+
+    def _get_task_display_name(self, task):
+        self.task_display_name = None
+        display_name = task.get_name().strip().split(" : ")
+
+        task_display_name = display_name[-1]
+        if task_display_name.startswith("include"):
+            return
+        else:
+            self.task_display_name = task_display_name
+
+    def _preprocess_result(self, result):
+        self.delegated_vars = result._result.get('_ansible_delegated_vars', None)
+        self._handle_exception(result._result)
+        self._handle_warnings(result._result)
+
+    def _process_result_output(self, result, msg):
+        task_host = result._host.get_name()
+        task_result = "%s %s" % (task_host, msg)
+
+        if self._run_is_verbose(result):
+            task_result = "%s %s: %s" % (task_host, msg, self._dump_results(result._result, indent=4))
+
+        if self.delegated_vars:
+            task_delegate_host = self.delegated_vars['ansible_host']
+            task_result = "%s -> %s %s" % (task_host, task_delegate_host, msg)
+
+        if result._result.get('msg') and result._result.get('msg') != "All items completed":
+            task_result += " | msg: " + result._result.get('msg')
+
+        if result._result.get('stdout'):
+            task_result += " | stdout: " + result._result.get('stdout')
+
+        if result._result.get('stderr'):
+            task_result += " | stderr: " + result._result.get('stderr')
+
+        return task_result
+
+    def v2_playbook_on_task_start(self, task, is_conditional):
+        self._get_task_display_name(task)
+        if self.task_display_name is not None:
+            self._display.display("%s..." % self.task_display_name)
+
+    def v2_playbook_on_handler_task_start(self, task):
+        self._get_task_display_name(task)
+        if self.task_display_name is not None:
+            self._display.display("%s (via handler)... " % self.task_display_name)
+
+    def v2_playbook_on_play_start(self, play):
+        # TODO display name of play and list of play hosts
+        # TODO don't display play name if no hosts in play
+        name = play.get_name().strip()
+        if name:
+            msg = u"\n- %s -" % name
+        else:
+            msg = u"---"
+
+        self._display.display(msg)
+
+    def v2_runner_on_failed(self, result, ignore_errors=False):
+        self._preprocess_result(result)
+        display_color = C.COLOR_ERROR
+        msg = "failed"
+
+        task_result = self._process_result_output(result, msg)
+        self._display.display("  " + task_result, display_color)
+
+    def v2_runner_on_ok(self, result, msg="ok", display_color=C.COLOR_OK):
+        self._preprocess_result(result)
+
+        result_was_changed = ('changed' in result._result and result._result['changed'])
+        if result_was_changed:
+            msg = "done"
+            display_color = C.COLOR_CHANGED
+
+        task_result = self._process_result_output(result, msg)
+        self._display.display("  " + task_result, display_color)
+
+    def v2_runner_item_on_failed(self, result):
+        self.v2_runner_on_failed(result)
+
+    def v2_runner_on_unreachable(self, result):
+        msg = "unreachable"
+        display_color = C.COLOR_UNREACHABLE
+        task_result = self._process_result_output(result, msg)
+
+        self._display.display("  " + task_result, display_color)
+
+    def v2_on_file_diff(self, result):
+        if result._task.loop and 'results' in result._result:
+            for res in result._result['results']:
+                if 'diff' in res and res['diff'] and res.get('changed', False):
+                    diff = self._get_diff(res['diff'])
+                    if diff:
+                        self._display.display(diff)
+        elif 'diff' in result._result and result._result['diff'] and result._result.get('changed', False):
+            diff = self._get_diff(result._result['diff'])
+            if diff:
+                self._display.display(diff)
+
+    def v2_playbook_on_stats(self, stats):
+        self._display.display("\n- Play recap -", screen_only=True)
+
+        hosts = sorted(stats.processed.keys())
+        for h in hosts:
+            # TODO how else can we display these?
+            t = stats.summarize(h)
+
+            self._display.display(u"  %s : %s %s %s %s" % (
+                hostcolor(h, t),
+                colorize(u'ok', t['ok'], C.COLOR_OK),
+                colorize(u'changed', t['changed'], C.COLOR_CHANGED),
+                colorize(u'unreachable', t['unreachable'], C.COLOR_UNREACHABLE),
+                colorize(u'failed', t['failures'], C.COLOR_ERROR)),
+                screen_only=True
+            )
+
+            self._display.display(u"  %s : %s %s %s %s" % (
+                hostcolor(h, t, False),
+                colorize(u'ok', t['ok'], None),
+                colorize(u'changed', t['changed'], None),
+                colorize(u'unreachable', t['unreachable'], None),
+                colorize(u'failed', t['failures'], None)),
+                log_only=True
+            )
+
+    def v2_playbook_on_no_hosts_matched(self):
+        self._display.display("  No hosts found!", color=C.COLOR_DEBUG)
+
+    def v2_playbook_on_no_hosts_remaining(self):
+        self._display.display("  Ran out of hosts!", color=C.COLOR_ERROR)
+
+    def v2_playbook_on_start(self, playbook):
+        # TODO display whether this run is happening in check mode
+        self._display.display("Executing playbook %s" % basename(playbook._file_name))
+
+        if self._display.verbosity > 3:
+            if self._options is not None:
+                for option in dir(self._options):
+                    if option.startswith('_') or option in ['read_file', 'ensure_value', 'read_module']:
+                        continue
+                    val = getattr(self._options, option)
+                    if val:
+                        self._display.vvvv('%s: %s' % (option, val))
+
+    def v2_runner_retry(self, result):
+        msg = "  Retrying... (%d of %d)" % (result._result['attempts'], result._result['retries'])
+        if (self._display.verbosity > 2 or '_ansible_verbose_always' in result._result) and '_ansible_verbose_override' not in result._result:
+            msg += "Result was: %s" % self._dump_results(result._result)
+        self._display.display(msg, color=C.COLOR_DEBUG)