From 52d6e1f83612f6f83b7a3df849edc49ca3822acf Mon Sep 17 00:00:00 2001
From: Ronny Pfannschmidt <opensource@ronnypfannschmidt.de>
Date: Thu, 21 Sep 2023 10:17:50 +0200
Subject: [PATCH] fix #918: use packaging from setuptools for self-build

---
 CHANGELOG.rst                      | 1 +
 pyproject.toml                     | 1 -
 src/setuptools_scm/_version_cls.py | 8 ++++++--
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 36587632..994aefe5 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,7 @@ v8.0.2
 
 bugfix
 ------
+* fix #918: use packaging from setuptools for self-build
 * fix #914: ignore the deprecated git archival plugin as its integrated now
 * fix #912: ensure mypy safety of the version template + regression test
 * fix #913: use 240s timeout instead of 20 for git unshallow
diff --git a/pyproject.toml b/pyproject.toml
index dc5475ce..983789f9 100644
--- 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
index e62c9fad..55c00c60 100644
--- 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):