Adopt distutils

changelog.d/2143.breaking.rst

@@ -0,0 +1 @@
+Setuptools adopts distutils from the Python 3.9 standard library and no longer depends on distutils in the standard library. When importing ``setuptools`` or ``setuptools.distutils_patch``, Setuptools will expose its bundled version as a top-level ``distutils`` package (and unload any previously-imported top-level distutils package), retaining the expectation that ``distutils``' objects are actually Setuptools objects. Although this change is not expected to break any use cases, it will likely affect tool chains that are monkey-patching distutils or relying on Setuptools' own monkey-patching of distutils.

conftest.py

@@ -14,6 +14,7 @@ def pytest_addoption(parser):
 collect_ignore = [
     'tests/manual_test.py',
     'setuptools/tests/mod_with_constant.py',
+    'setuptools/_distutils',
 ]
 
 

pkg_resources/__init__.py

@@ -1459,7 +1459,8 @@ def run_script(self, script_name, namespace):
         script_filename = self._fn(self.egg_info, script)
         namespace['__file__'] = script_filename
         if os.path.exists(script_filename):
-            source = open(script_filename).read()
+            with open(script_filename) as fid:
+                source = fid.read()
             code = compile(source, script_filename, 'exec')
             exec(code, namespace, namespace)
         else:

setuptools/__init__.py

@@ -2,6 +2,9 @@
 
 import os
 import functools
+
+import setuptools.distutils_patch  # noqa: F401
+
 import distutils.core
 import distutils.filelist
 import re

setuptools/_distutils/README

@@ -0,0 +1,11 @@
+This directory contains the Distutils package.
+
+There's a full documentation available at:
+
+    http://docs.python.org/distutils/
+
+The Distutils-SIG web page is also a good starting point:
+
+    http://www.python.org/sigs/distutils-sig/
+
+$Id$

setuptools/_distutils/__init__.py

@@ -0,0 +1,15 @@
+"""distutils
+
+The main package for the Python Module Distribution Utilities.  Normally
+used from a setup script as
+
+   from distutils.core import setup
+
+   setup (...)
+"""
+
+import sys
+
+__version__ = sys.version[:sys.version.index(' ')]
+
+local = True