_distutils_hack uses importlib.util.abc.Loader instead of importlib.abc.Loader

[ammaraskar]

The following error is being thrown on the latest Python built from source:

Traceback (most recent call last):
  File "/root/cpython/Doc/./venv/bin/sphinx-build", line 5, in <module>
    from sphinx.cmd.build import main
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/cmd/build.py", line 23, in <module>
    from sphinx.application import Sphinx
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/application.py", line 28, in <module>
    from sphinx.config import Config
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/config.py", line 22, in <module>
    from sphinx.util import logging
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/util/__init__.py", line 40, in <module>
    from sphinx.util import smartypants  # noqa
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/util/smartypants.py", line 33, in <module>
    from sphinx.util.docutils import __version_info__ as docutils_version
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/sphinx/util/docutils.py", line 17, in <module>
    from distutils.version import LooseVersion
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 982, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 925, in _find_spec
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/_distutils_hack/__init__.py", line 74, in find_spec
    return method()
  File "/root/cpython/Doc/venv/lib/python3.10/site-packages/_distutils_hack/__init__.py", line 79, in spec_for_distutils
    class DistutilsLoader(importlib.util.abc.Loader):
AttributeError: module 'importlib.util' has no attribute 'abc'

The curlprit commit is python/cpython@9e09849

It seems to me like the fact that importlib.abc was exported through importlib.util.abc was an implementation detail and this code should be using importlib.abc.Loader directly:

setuptools/_distutils_hack/__init__.py

Line 79 in 04e3df2

class DistutilsLoader(importlib.util.abc.Loader):

[ammaraskar]

Pinging @pganssle / @jaraco as the last people to touch this code.

[encukou]

See #2361

[ammaraskar]

Thanks for the pointer! Sorry for the duplicate.