Disable distutils fixup for python 3

docs/changelog/1669.bugfix.rst

@@ -0,0 +1,2 @@
+Disable distutils fixup for python 3 until `pypa/pip #7778 <https://github.com/pypa/pip/issues/7778>`_ is fixed and
+released - by :user:`gaborbernat`.

setup.py

@@ -5,8 +5,5 @@
 
 setup(
     use_scm_version={"write_to": "src/virtualenv/version.py", "write_to_template": '__version__ = "{version}"'},
-    setup_requires=[
-        # this cannot be enabled until https://github.com/pypa/pip/issues/7778 is addressed
-        # "setuptools_scm >= 2"
-    ],
+    setup_requires=["setuptools_scm >= 2"],
 )

src/virtualenv/create/via_global_ref/api.py

@@ -53,6 +53,8 @@ def create(self):
 
     def patch_distutils_via_pth(self):
         """Patch the distutils package to not be derailed by its configuration files"""
+        if self.interpreter.version_info.major == 3:
+            return  # TODO: remove this, for her to bypass: https://github.com/pypa/pip/issues/7778
         patch_file = Path(__file__).parent / "_distutils_patch_virtualenv.py"
         with ensure_file_on_disk(patch_file, self.app_data) as resolved_path:
             text = resolved_path.read_text()

tests/unit/create/test_creator.py

@@ -19,7 +19,7 @@
 from virtualenv.create.creator import DEBUG_SCRIPT, Creator, get_env_debug_info
 from virtualenv.discovery.builtin import get_interpreter
 from virtualenv.discovery.py_info import PythonInfo
-from virtualenv.info import IS_PYPY, fs_supports_symlink
+from virtualenv.info import IS_PYPY, PY3, fs_supports_symlink
 from virtualenv.pyenv_cfg import PyEnvCfg
 from virtualenv.run import cli_run, session_via_cli
 from virtualenv.util.path import Path
@@ -351,6 +351,7 @@ def test_create_long_path(current_fastest, tmp_path):
     subprocess.check_call([str(result.creator.script("pip")), "--version"])
 
 
+@pytest.mark.skipif(PY3, reason="https://github.com/pypa/pip/issues/7778")
 @pytest.mark.parametrize("creator", set(PythonInfo.current_system().creators().key_to_class) - {"builtin"})
 def test_create_distutils_cfg(creator, tmp_path, monkeypatch):
     cmd = [