Using importlib_metadata to backport to Python 3.9

Author: kageurufu

klippy/printer.py

@@ -5,7 +5,8 @@
 # This file may be distributed under the terms of the GNU GPLv3 license.
 
 import sys, os, gc, optparse, logging, time, collections
-import importlib, importlib.metadata, importlib.util
+import importlib, importlib.util
+import importlib_metadata
 
 from . import compat
 from . import util, reactor, queuelogger, msgproto
@@ -146,7 +147,7 @@ def load_object(self, config, section, default=configfile.sentinel):
         plugins_spec = importlib.util.find_spec(
             f".{module_name}", "klippy.plugins"
         )
-        entrypoints = importlib.metadata.entry_points(
+        entrypoints = importlib_metadata.entry_points(
             group="kalico.plugins", name=module_name
         )
         if entrypoints:
@@ -557,7 +558,7 @@ def main():
     extra_git_desc += "\nRemote: %s" % (git_info["remote"])
     extra_git_desc += "\nTracked URL: %s" % (git_info["url"])
 
-    plugins = importlib.metadata.entry_points(group="kalico.plugins")
+    plugins = importlib_metadata.entry_points(group="kalico.plugins")
     for plugin in plugins:
         extra_git_desc += f"\nPlugin {plugin.dist.name}=={plugin.dist.version}"
         start_args["plugins"][plugin.dist.name] = plugin.dist.metadata.json

pyproject.toml

@@ -15,6 +15,7 @@ dependencies = [
   "pyserial==3.4",
   "python-can~=4.5",
   "setuptools==75.8.2 ; python_version >= '3.12'", # required by python-can < 4.3
+  "importlib-metadata>=8.7.0",
 ]
 
 [tool.uv]

scripts/klippy-requirements.txt

@@ -10,6 +10,8 @@ greenlet==3.0.3 ; python_full_version == '3.12.*'
     # via kalico
 greenlet==3.1.0 ; python_full_version >= '3.13'
     # via kalico
+importlib-metadata==8.7.0
+    # via kalico
 jinja2==3.1.5
     # via kalico
 markupsafe==2.1.5
@@ -36,3 +38,5 @@ typing-extensions==4.13.2
     # via python-can
 wrapt==1.17.2
     # via python-can
+zipp==3.23.0
+    # via importlib-metadata