Update test suite ready for python 3.12

Drop support for python 3.8 - it's almost end of life and doesn't
support importlib.resources.files() - we could use the backport
importlib_resources module but easier to drop support.

This change will only get merged into 1.29 and beyond - the
assumption being that anyone who's ready for kubernetes 1.29
is ready for python 3.9+

.github/workflows/tox.yaml

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

src/kubernetes_validate/utils.py

@@ -5,12 +5,12 @@
 import platform
 import re
 import sys
-from distutils.version import LooseVersion
 from typing import Any, Dict, Generator, List, Union
 from typing_extensions import Protocol
+from packaging.version import Version
 
 import jsonschema
-import pkg_resources
+import importlib.resources
 import yaml
 
 from kubernetes_validate.version import __version__
@@ -48,10 +48,12 @@ def __init__(self, message: str):
 
 
 def all_versions() -> List[str]:
-    schemas = pkg_resources.resource_listdir('kubernetes_validate', '/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) for schema in schemas if version_regex.match(schema)],
-                  key=LooseVersion)
+    return sorted([version_regex.sub(r"\1", schema.name)
+                   for schema in schemas.iterdir()
+                   if version_regex.match(schema.name)],
+                  key=Version)
 
 
 def major_minor(version: str) -> str:
@@ -83,24 +85,24 @@ def validate(data: Union[Dict[str, Any], SupportsToDict], desired_version: str,
     schema_dir = 'v%s-local' % version
     if strict:
         schema_dir += '-strict'
-    schema_file = pkg_resources.resource_filename('kubernetes_validate',
-                                                  '/kubernetes-json-schema/%s/%s-%s.json' %
-                                                  (schema_dir, data['kind'].lower(), api_version))
-
-    try:
-        f = open(schema_file)
-    except IOError:
-        if not os.path.exists(os.path.dirname(schema_file)):
-            raise VersionNotSupportedError(version=desired_version)
-        raise SchemaNotFoundError(version=major_minor(desired_version), kind=data['kind'],
-                                  api_version=data['apiVersion'])
-    try:
-        schema = json.load(f)
-    except json.decoder.JSONDecodeError:
-        raise InvalidSchemaError("Couldn't parse schema %s" % schema_file)
-    finally:
-        f.close()
-    schema_dir = os.path.dirname(os.path.abspath(schema_file))
+    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:
+        try:
+            f = open(schema_file)
+        except IOError:
+            if not os.path.exists(os.path.dirname(schema_file)):
+                raise VersionNotSupportedError(version=desired_version)
+            raise SchemaNotFoundError(version=major_minor(desired_version), kind=data['kind'],
+                                      api_version=data['apiVersion'])
+        try:
+            schema = json.load(f)
+        except json.decoder.JSONDecodeError:
+            raise InvalidSchemaError("Couldn't parse schema %s" % schema_file)
+        finally:
+            f.close()
+        schema_dir = os.path.dirname(os.path.abspath(schema_file))
 
     uri_prefix = "file://"
     if platform.system() == 'Windows':

tests/test_validate_file.py

@@ -7,34 +7,34 @@
 def test_validate_resource_file():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'resource.yaml'), '1.22.0',
                                            strict=False, quiet=True, no_warn=True)
-    assert(rc == 0)
+    assert (rc == 0)
 
 
 def test_validate_multi_resource_file():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'kuard-all.yaml'), '1.22.0',
                                            strict=False, quiet=True, no_warn=True)
-    assert(rc == 1)
+    assert (rc == 1)
 
 
 def test_validate_strict_file():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'kuard-extra-property.yaml'), '1.22.0',
                                            strict=True, quiet=True, no_warn=True)
-    assert(rc == 1)
+    assert (rc == 1)
 
 
 def test_validate_invalid_file():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'kuard-invalid-type.yaml'), '1.22.0',
                                            strict=False, quiet=True, no_warn=True)
-    assert(rc == 1)
+    assert (rc == 1)
 
 
 def test_validate_madeup_file():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'kuard-made-up-kind.yaml'), '1.22.0',
                                            strict=False, quiet=True, no_warn=True)
-    assert(rc == 0)
+    assert (rc == 0)
 
 
 def test_validate_version_too_new():
     rc = kubernetes_validate.validate_file(os.path.join(parent, 'resource.yaml'), '1.99.0',
                                            strict=False, quiet=True, no_warn=True)
-    assert(rc == 2)
+    assert (rc == 2)

tests/test_validate_resources.py

@@ -44,6 +44,7 @@ def test_validate_version_too_new():
     except utils.VersionNotSupportedError:
         assert True
 
+
 def test_validate_object_resource():
     resources = utils.resources_from_file(os.path.join(parent, 'resource.yaml'))
 

tox.ini

@@ -1,23 +1,24 @@
 [tox]
 minversion = 1.6
-envlist = py{38,39,310}-{pytest,flake8},mypy
+envlist = py{39,310,311,312}-{pytest,flake8},mypy
 
 [gh-actions]
 python =
-    3.8: py38
-    3.9: py39
+    3.9: py39, mypy
     3.10: py310, mypy
+    3.11: py311, mypy
+    3.12: py312, mypy
 
 [testenv]
 
-[testenv:py{38,39,310}-pytest]
+[testenv:py{39,310,311,312}-pytest]
 deps =
   -rtest-deps.txt
 commands = pytest
 passenv = HOME
 recreate = False
 
-[testenv:py{38,39,310}-flake8]
+[testenv:py{39,310,311,312}-flake8]
 platform = linux|darwin
 deps = flake8
 commands = python -m flake8 src