feat: Support Python 3.12

* Replace the use of pkg_resources (from setuptools, which is
  no longer included in virtual environments as of 3.12) with
  importlib.metadata.

* Add Python 3.12 to the test matrix.

.github/workflows/tox.yml

@@ -14,6 +14,7 @@ jobs:
           - '3.9'
           - '3.10'
           - '3.11'
+          - '3.12'
 
     steps:
     - name: Check out code

CHANGELOG.md

@@ -1,3 +1,6 @@
+## Unreleased
+* [Enhancement] Support Python 3.12.
+
 ## Version 3.1.0 (2024-01-12)
 
 * [Enhancement] Support Tutor 17 and Open edX Quince.

tox.ini

@@ -1,12 +1,13 @@
 [tox]
-envlist = gitlint,py{38,39,310,311},flake8
+envlist = gitlint,py{38,39,310,311,312},flake8
 
 [gh-actions]
 python =
     3.8: gitlint,py38,flake8
     3.9: gitlint,py39,flake8
     3.10: gitlint,py310,flake8
     3.11: gitlint,py311,flake8
+    3.12: gitlint,py312,flake8
 
 [flake8]
 ignore = E124,W504

tutorbackup/__about__.py

@@ -1,9 +1,8 @@
-import pkg_resources
+from importlib import metadata
 # __version__ attribute as suggested by (deferred) PEP 396:
 # https://www.python.org/dev/peps/pep-0396/
 #
 # Single-source package definition as suggested (among several
 # options) by:
 # https://packaging.python.org/guides/single-sourcing-package-version/
-__version__ = pkg_resources.get_distribution(
-    'tutor-contrib-backup').version
+__version__ = metadata.version('tutor-contrib-backup')

tutorbackup/plugin.py

@@ -2,7 +2,7 @@
 from .__about__ import __version__
 from glob import glob
 import os
-import pkg_resources
+import importlib_resources
 import click
 from tutor import hooks
 from tutor import config as tutor_config
@@ -154,7 +154,7 @@ def restore(context, date, version, exclude, list_versions):  # noqa: F811
 
 # Add the "templates" folder as a template root
 hooks.Filters.ENV_TEMPLATE_ROOTS.add_item(
-    pkg_resources.resource_filename("tutorbackup", "templates")
+    str(importlib_resources.files("tutorbackup") / "templates")
 )
 # Render the "build" and "apps" folders
 hooks.Filters.ENV_TEMPLATE_TARGETS.add_items(
@@ -164,12 +164,9 @@ def restore(context, date, version, exclude, list_versions):  # noqa: F811
     ],
 )
 # Load patches from files
-for path in glob(
-    os.path.join(
-        pkg_resources.resource_filename("tutorbackup", "patches"),
-        "*",
-    )
-):
+for path in glob(str(
+        importlib_resources.files("tutorbackup") / "patches" / "*")):
+
     with open(path, encoding="utf-8") as patch_file:
         hooks.Filters.ENV_PATCHES.add_item(
             (os.path.basename(path), patch_file.read())