fix #918: use packaging from setuptools for self-build

pypa · Sep 21, 2023 · 355e835 · 355e835
1 parent 9d6ab45
commit 355e835
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Showing 2 changed files with 6 additions and 3 deletions.
diff --git a/pyproject.toml b/pyproject.toml
@@ -4,7 +4,6 @@
 build-backend = "_own_version_helper"
 requires = [
   'importlib-metadata>=4.6; python_version < "3.10"',
-  "packaging>=20",
   "rich",
   "setuptools>=61",
   'tomli; python_version < "3.11"',

diff --git a/src/setuptools_scm/_version_cls.py b/src/setuptools_scm/_version_cls.py
@@ -5,8 +5,12 @@
 from typing import Type
 from typing import Union
 
-from packaging.version import InvalidVersion
-from packaging.version import Version as Version
+try:
+    from packaging.version import InvalidVersion
+    from packaging.version import Version as Version
+except ImportError:
+    from setuptools.extern.packaging.version import InvalidVersion  # type: ignore
+    from setuptools.extern.packaging.version import Version as Version  # type: ignore
 
 
 class NonNormalizedVersion(Version):