fix: switch pkgutil for importlib-resources (#887)

.pre-commit-config.yaml

@@ -43,6 +43,7 @@ repos:
           - orjson # Faster mypy
           - packaging
           - importlib_metadata
+          - importlib_resources
           - tomli
           - uv
 

nox/tox_to_nox.py

@@ -18,8 +18,8 @@
 
 import argparse
 import os
-import pkgutil
 import re
+import sys
 from configparser import ConfigParser
 from importlib import metadata
 from pathlib import Path
@@ -29,18 +29,25 @@
 import jinja2
 import tox.config
 
+if sys.version_info < (3, 9):
+    from importlib_resources import files
+else:
+    from importlib.resources import files
+
 TOX_VERSION = metadata.version("tox")
 
 TOX4 = int(TOX_VERSION.split(".")[0]) >= 4
 
+DATA = files("nox")
+
 if TOX4:
     _TEMPLATE = jinja2.Template(
-        pkgutil.get_data(__name__, "tox4_to_nox.jinja2").decode("utf-8"),  # type: ignore[union-attr]
+        DATA.joinpath("tox4_to_nox.jinja2").read_text(encoding="utf-8"),
         extensions=["jinja2.ext.do"],
     )
 else:
     _TEMPLATE = jinja2.Template(
-        pkgutil.get_data(__name__, "tox_to_nox.jinja2").decode("utf-8"),  # type: ignore[union-attr]
+        DATA.joinpath("tox_to_nox.jinja2").read_text(encoding="utf-8"),
         extensions=["jinja2.ext.do"],
     )
 

pyproject.toml

@@ -47,6 +47,7 @@ dependencies = [
   "virtualenv>=20.14.1",
 ]
 optional-dependencies.tox_to_nox = [
+  "importlib-resources; python_version<'3.9'",
   "jinja2",
   "tox",
 ]