python3-pyinotify: Make asyncore support optional for Python 3

Simple fix for Python 3.12 since it dropped asyncore. Catches the import
error instead of using a version check so that the user can install the
compatibility package for any uses that can't be upgraded to asyncio or
similar immediately.

Fixes:
 # python3
 Python 3.12.1 (main, Dec 7 2023, 20:45:44) [GCC 13.2.0] on linux
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import pyinotify
 Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/lib64/python3.12/site-packages/pyinotify.py", line 71, in <module>
 import asyncore
 ModuleNotFoundError: No module named 'asyncore'
 >>>

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 96 insertions, 0 deletions

diff --git a/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify/0001-Make-asyncore-support-optional-for-Python-3.patch b/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify/0001-Make-asyncore-support-optional-for-Python-3.patch
new file mode 100644
index 0000000..075a035
--- /dev/null
+++ b/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify/0001-Make-asyncore-support-optional-for-Python-3.patch
@@ -0,0 +1,92 @@
+From 478d595a7d086423733e9f5da5edfe9f1df48682 Mon Sep 17 00:00:00 2001
+From: Troy Curtis Jr <troy@troycurtisjr.com>
+Date: Thu, 10 Aug 2023 21:51:15 -0400
+Subject: [PATCH] Make asyncore support optional for Python 3.
+
+Fixes #204.
+
+Upstream-Status: Submitted [https://github.com/seb-m/pyinotify/pull/205]
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+
+---
+ python3/pyinotify.py | 50 +++++++++++++++++++++++++-------------------
+ 1 file changed, 28 insertions(+), 22 deletions(-)
+
+diff --git a/python3/pyinotify.py b/python3/pyinotify.py
+index bc24313..f4a5a90 100755
+--- a/python3/pyinotify.py
++++ b/python3/pyinotify.py
+@@ -68,7 +68,6 @@ from collections import deque
+ from datetime import datetime, timedelta
+ import time
+ import re
+-import asyncore
+ import glob
+ import locale
+ import subprocess
+@@ -1494,33 +1493,40 @@ class ThreadedNotifier(threading.Thread, Notifier):
+         self.loop()
+ 
+ 
+-class AsyncNotifier(asyncore.file_dispatcher, Notifier):
+-    """
+-    This notifier inherits from asyncore.file_dispatcher in order to be able to
+-    use pyinotify along with the asyncore framework.
++try:
++    import asyncore
+ 
+-    """
+-    def __init__(self, watch_manager, default_proc_fun=None, read_freq=0,
+-                 threshold=0, timeout=None, channel_map=None):
++    class AsyncNotifier(asyncore.file_dispatcher, Notifier):
+         """
+-        Initializes the async notifier. The only additional parameter is
+-        'channel_map' which is the optional asyncore private map. See
+-        Notifier class for the meaning of the others parameters.
++        This notifier inherits from asyncore.file_dispatcher in order to be able to
++        use pyinotify along with the asyncore framework.
+ 
+         """
+-        Notifier.__init__(self, watch_manager, default_proc_fun, read_freq,
+-                          threshold, timeout)
+-        asyncore.file_dispatcher.__init__(self, self._fd, channel_map)
++        def __init__(self, watch_manager, default_proc_fun=None, read_freq=0,
++                     threshold=0, timeout=None, channel_map=None):
++            """
++            Initializes the async notifier. The only additional parameter is
++            'channel_map' which is the optional asyncore private map. See
++            Notifier class for the meaning of the others parameters.
+ 
+-    def handle_read(self):
+-        """
+-        When asyncore tells us we can read from the fd, we proceed processing
+-        events. This method can be overridden for handling a notification
+-        differently.
++            """
++            Notifier.__init__(self, watch_manager, default_proc_fun, read_freq,
++                              threshold, timeout)
++            asyncore.file_dispatcher.__init__(self, self._fd, channel_map)
+ 
+-        """
+-        self.read_events()
+-        self.process_events()
++        def handle_read(self):
++            """
++            When asyncore tells us we can read from the fd, we proceed processing
++            events. This method can be overridden for handling a notification
++            differently.
++
++            """
++            self.read_events()
++            self.process_events()
++except ImportError:
++    # asyncore was removed in Python 3.12, but try the import instead of a
++    # version check in case the compatibility package is installed.
++    pass
+ 
+ 
+ class TornadoAsyncNotifier(Notifier):
+-- 
+2.25.1
+
diff --git a/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify_0.9.6.bb b/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify_0.9.6.bb
index 9acdf54..ff1b611 100644
--- a/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify_0.9.6.bb
+++ b/dynamic-layers/meta-python/recipes-devtools/python/python3-pyinotify_0.9.6.bb
@@ -15,4 +15,8 @@ RDEPENDS:${PN} += "\
 SRC_URI[md5sum] = "8e580fa1ff3971f94a6f81672b76c406"
 SRC_URI[sha256sum] = "9c998a5d7606ca835065cdabc013ae6c66eb9ea76a00a1e3bc6e0cfe2b4f71f4"
 
+SRC_URI += " \
+           file://0001-Make-asyncore-support-optional-for-Python-3.patch \
+"
+
 inherit pypi setuptools3