More distutils workarounds

Author: Avasam

mypy.ini

@@ -5,7 +5,7 @@
 strict = False
 
 # Early opt-in even when strict = False
-warn_unused_ignores = True
+# warn_unused_ignores = True # Disabled until we have distutils stubs for Python 3.12+
 warn_redundant_casts = True
 enable_error_code = ignore-without-code
 
@@ -34,12 +34,14 @@ exclude = (?x)(
 	# Duplicate module name
 	| ^pkg_resources/tests/data/my-test-package-source/setup.py$
 	)
-
-# DistributionMetadata.license_files and DistributionMetadata.license_file
-# are dynamically patched in setuptools/_core_metadata.py
-# and no DistributionMetadata subclass exists in setuptools
 [mypy-setuptools.*]
-disable_error_code = attr-defined
+disable_error_code =
+	# DistributionMetadata.license_files and DistributionMetadata.license_file
+	# are dynamically patched in setuptools/_core_metadata.py
+	# and no DistributionMetadata subclass exists in setuptools
+	attr-defined,
+	# See issue described below about distutils across Python versions
+	has-type,
 
 # - pkg_resources tests create modules that won't exists statically before the test is run.
 #   Let's ignore all "import-not-found" since, if an import really wasn't found, then the test would fail.

setuptools/errors.py

@@ -30,15 +30,15 @@
 BaseError = _distutils_errors.DistutilsError
 
 
-class InvalidConfigError(OptionError):
+class InvalidConfigError(OptionError):  # type: ignore[valid-type, misc] # distutils imports are `Any` on python 3.12+
     """Error used for invalid configurations."""
 
 
-class RemovedConfigError(OptionError):
+class RemovedConfigError(OptionError):  # type: ignore[valid-type, misc] # distutils imports are `Any` on python 3.12+
     """Error used for configurations that were deprecated and removed."""
 
 
-class RemovedCommandError(BaseError, RuntimeError):
+class RemovedCommandError(BaseError, RuntimeError):  # type: ignore[valid-type, misc] # distutils imports are `Any` on python 3.12+
     """Error used for commands that have been removed in setuptools.
 
     Since ``setuptools`` is built on ``distutils``, simply removing a command
@@ -48,7 +48,7 @@ class RemovedCommandError(BaseError, RuntimeError):
     """
 
 
-class PackageDiscoveryError(BaseError, RuntimeError):
+class PackageDiscoveryError(BaseError, RuntimeError):  # type: ignore[valid-type, misc] # distutils imports are `Any` on python 3.12+
     """Impossible to perform automatic discovery of packages and/or modules.
 
     The current project layout or given discovery options can lead to problems when