Improve parsing of warnings and errors (#811)

* Add logfmt message parser.

* Parse logfmt formatted warnings.

* Follow-up for #810.

* Fix handling of warning and error messages.

* Make Python 2 compatible.

* Linting. Improving tests.

tests/unit/plugins/module_utils/test__logfmt.py

@@ -0,0 +1,100 @@
+# 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
+
+import pytest
+
+from ansible_collections.community.docker.plugins.module_utils._logfmt import (
+    InvalidLogFmt,
+    parse_line,
+)
+
+
+SUCCESS_TEST_CASES = [
+    (
+        'time="2024-02-02T08:14:10+01:00" level=warning msg="a network with name influxNetwork exists but was not'
+        ' created for project \\"influxdb\\".\\nSet `external: true` to use an existing network"',
+        {},
+        {
+            'time': '2024-02-02T08:14:10+01:00',
+            'level': 'warning',
+            'msg': 'a network with name influxNetwork exists but was not created for project "influxdb".\nSet `external: true` to use an existing network',
+        },
+    ),
+    (
+        'time="2024-02-02T08:14:10+01:00" level=warning msg="a network with name influxNetwork exists but was not'
+        ' created for project \\"influxdb\\".\\nSet `external: true` to use an existing network"',
+        {'logrus_mode': True},
+        {
+            'time': '2024-02-02T08:14:10+01:00',
+            'level': 'warning',
+            'msg': 'a network with name influxNetwork exists but was not created for project "influxdb".\nSet `external: true` to use an existing network',
+        },
+    ),
+    (
+        'foo=bar a=14 baz="hello kitty" cool%story=bro f %^asdf',
+        {},
+        {
+            'foo': 'bar',
+            'a': '14',
+            'baz': 'hello kitty',
+            'cool%story': 'bro',
+            'f': None,
+            '%^asdf': None,
+        },
+    ),
+    (
+        '{"foo":"bar"}',
+        {},
+        {
+            '{': None,
+            'foo': None,
+            ':': None,
+            'bar': None,
+            '}': None,
+        },
+    ),
+]
+
+
+FAILURE_TEST_CASES = [
+    (
+        'foo=bar a=14 baz="hello kitty" cool%story=bro f %^asdf',
+        {'logrus_mode': True},
+        'Key must always be followed by "=" in logrus mode',
+    ),
+    (
+        '{}',
+        {'logrus_mode': True},
+        'Key must always be followed by "=" in logrus mode',
+    ),
+    (
+        '[]',
+        {'logrus_mode': True},
+        'Key must always be followed by "=" in logrus mode',
+    ),
+    (
+        '{"foo=bar": "baz=bam"}',
+        {'logrus_mode': True},
+        'Key must always be followed by "=" in logrus mode',
+    ),
+]
+
+
+@pytest.mark.parametrize('line, kwargs, result', SUCCESS_TEST_CASES)
+def test_parse_line_success(line, kwargs, result):
+    res = parse_line(line, **kwargs)
+    print(repr(res))
+    assert res == result
+
+
+@pytest.mark.parametrize('line, kwargs, message', FAILURE_TEST_CASES)
+def test_parse_line_success(line, kwargs, message):
+    with pytest.raises(InvalidLogFmt) as exc:
+        parse_line(line, **kwargs)
+
+    print(repr(exc.value.args[0]))
+    assert exc.value.args[0] == message

tests/unit/plugins/module_utils/test_compose_v2.py

@@ -175,6 +175,48 @@ EXTRA_TEST_CASES = [
         ],
         [],
     ),
+    (
+        # https://github.com/ansible-collections/community.docker/issues/787
+        '2.20.3-logrus-warn',
+        '2.20.3',
+        False,
+        'time="2024-02-02T08:14:10+01:00" level=warning msg="a network with name influxNetwork exists but was not'
+        ' created for project \\"influxdb\\".\\nSet `external: true` to use an existing network"\n',
+        [],
+        [
+            'a network with name influxNetwork exists but was not created for project "influxdb".\nSet `external: true` to use an existing network',
+        ],
+    ),
+    (
+        # https://github.com/ansible-collections/community.docker/issues/807
+        '2.20.3-image-warning-error',
+        '2.20.3',
+        False,
+        " dummy3 Warning \n"
+        " dummy2 Warning \n"
+        " dummy Error \n"
+        " dummy4 Warning Foo bar \n"
+        " dummy5 Error Bar baz bam \n",
+        [
+            Event(
+                'unknown',
+                'dummy',
+                'Error',
+                None,
+            ),
+            Event(
+                'unknown',
+                'dummy5',
+                'Error',
+                'Bar baz bam',
+            ),
+        ],
+        [
+            'Unspecified warning for dummy3',
+            'Unspecified warning for dummy2',
+            'dummy4: Foo bar',
+        ],
+    ),
 ]
 
 _ALL_TEST_CASES = EVENT_TEST_CASES + EXTRA_TEST_CASES
@@ -193,5 +235,8 @@ def test_parse_events(test_id, compose_version, dry_run, stderr, events, warning
 
     collected_events = parse_events(stderr, dry_run=dry_run, warn_function=collect_warning)
 
-    assert events == collected_events
-    assert warnings == collected_warnings
+    print(collected_events)
+    print(collected_warnings)
+
+    assert collected_events == events
+    assert collected_warnings == warnings