Don't use setup.py in doc tests (#8820)

ci-constraints-requirements.txt

@@ -1,7 +1,7 @@
 # This is named ambigiously, but it's a pip constraints file, named like a
 # requirements file so dependabot will update the pins.
 # It was originally generated with;
-#    pip-compile --extra=docs --extra=docstest --extra=pep8test --extra=test --extra=test-randomorder --extra=nox --resolver=backtracking --strip-extras --unsafe-package=cffi --unsafe-package=pycparser --unsafe-package=setuptools pyproject.toml
+#    pip-compile --extra=docs --extra=docstest --extra=pep8test --extra=test --extra=test-randomorder --extra=nox --extra=sdist --resolver=backtracking --strip-extras --unsafe-package=cffi --unsafe-package=pycparser --unsafe-package=setuptools pyproject.toml
 # and then manually massaged to add version specifiers to packages whose
 # versions vary by Python version
 
@@ -16,7 +16,9 @@ black==23.3.0
 bleach==6.0.0
     # via readme-renderer
 build==0.10.0
-    # via check-manifest
+    # via
+    #   check-manifest
+    #   cryptography (pyproject.toml)
 certifi==2022.12.7
     # via requests
 charset-normalizer==3.1.0

noxfile.py

@@ -106,7 +106,7 @@ def docs(session: nox.Session) -> None:
 
     # This is in the docs job because `twine check` verifies that the README
     # is valid reStructuredText.
-    session.run("python", "setup.py", "sdist")
+    session.run("python", "-m", "build", "--sdist")
     session.run("twine", "check", "dist/*")
 
 

pyproject.toml

@@ -80,7 +80,7 @@ test = [
 test-randomorder = ["pytest-randomly"]
 docs = ["sphinx >=5.3.0", "sphinx-rtd-theme >=1.1.1"]
 docstest =  ["pyenchant >=1.6.11", "twine >=1.12.0", "sphinxcontrib-spelling >=4.0.1"]
-sdist = ["setuptools_rust >=0.11.4"]
+sdist = ["build"]
 pep8test = ["black", "ruff", "mypy", "check-manifest"]
 
 [tool.black]