Restore python 3.8 functionality

Use the importlib_resources backport.

This allows a fairly seamless python3.12 bump before the 1.29 upgrade

.github/workflows/tox.yaml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v1

pyproject.toml

@@ -14,6 +14,9 @@ license = {text = "Apache"}
 dependencies = [
     "PyYAML",
     'jsonschema',
+    'typing-extensions',
+    'importlib-resources',
+    'packaging'
 ]
 dynamic = ["version", "readme"]
 

src/kubernetes_validate/utils.py

@@ -10,7 +10,9 @@
 from packaging.version import Version
 
 import jsonschema
-import importlib.resources
+
+import importlib_resources
+
 import yaml
 
 from kubernetes_validate.version import __version__
@@ -48,7 +50,7 @@ def __init__(self, message: str):
 
 
 def all_versions() -> List[str]:
-    schemas = importlib.resources.files('kubernetes_validate').joinpath('kubernetes-json-schema')
+    schemas = importlib_resources.files('kubernetes_validate').joinpath('kubernetes-json-schema')
     version_regex = re.compile(r'^v([^-]*).*')
     return sorted([version_regex.sub(r"\1", schema.name)
                    for schema in schemas.iterdir()
@@ -85,10 +87,10 @@ def validate(data: Union[Dict[str, Any], SupportsToDict], desired_version: str,
     schema_dir = 'v%s-local' % version
     if strict:
         schema_dir += '-strict'
-    ref = importlib.resources.files('kubernetes_validate').joinpath('kubernetes-json-schema/%s/%s-%s.json' %
+    ref = importlib_resources.files('kubernetes_validate').joinpath('kubernetes-json-schema/%s/%s-%s.json' %
                                                                     (schema_dir, data['kind'].lower(),
                                                                      api_version))
-    with importlib.resources.as_file(ref) as schema_file:
+    with importlib_resources.as_file(ref) as schema_file:
         try:
             f = open(schema_file)
         except IOError:

tox.ini

@@ -1,24 +1,25 @@
 [tox]
 minversion = 1.6
-envlist = py{39,310,311,312}-{pytest,flake8},mypy
+envlist = py{38,39,310,311,312}-{pytest,flake8},mypy
 
 [gh-actions]
 python =
+    3.8: py38, mypy
     3.9: py39, mypy
     3.10: py310, mypy
     3.11: py311, mypy
     3.12: py312, mypy
 
 [testenv]
 
-[testenv:py{39,310,311,312}-pytest]
+[testenv:py{38,39,310,311,312}-pytest]
 deps =
   -rtest-deps.txt
 commands = pytest
 passenv = HOME
 recreate = False
 
-[testenv:py{39,310,311,312}-flake8]
+[testenv:py{38,39,310,311,312}-flake8]
 platform = linux|darwin
 deps = flake8
 commands = python -m flake8 src