Checking the failed test:

FAILED tests/functional/test_wheel.py::test_pip_wheel_ext_module_with_tmpdir_inside - AssertionError: Script returned code: 1

I'm not sure whether this PR introduces the given failure. Also, it looks like it fails only on Mac.

We may want to add a test that verifies that provenance_url.json is created when installing a wheel found in cache. I think there is already such a test for download_info in the install report json.

We may want to add a test that verifies that provenance_url.json is created when installing a wheel found in cache. I think there is already such a test for download_info in the install report json.

Added tests, PTAL.

EDIT: docs CI failures do not seem to be related to this PR

There is still a little something that is nagging me.

This PR uses the direct_url.py model which implements the Direct URL Data Structure specification.

However, the current PEP 710 draft does not reference that specification explicitly.

So in theory there is a risk that if the Direct URL Data Structure specification evolves in the future, a change in direct_url.py could makes it inadvertently incompatible with PEP 710. To avoid this, it might be preferable either 1/ for PEP 710 to reference the Direct URL Data Structure specification, mentioning the subset of it that is allowed in provenance_url.json, or 2/ create a distinct provenance_url.py model in pip.

However, the current PEP 710 draft does not reference that specification explicitly.

So in theory there is a risk that if the Direct URL Data Structure specification evolves in the future, a change in direct_url.py could makes it inadvertently incompatible with PEP 710. To avoid this, it might be preferable either 1/ for PEP 710 to reference the Direct URL Data Structure specification, mentioning the subset of it that is allowed in provenance_url.json, or 2/ create a distinct provenance_url.py model in pip.

Added links to the Direct URL data structure in python/peps#3887. Please let me know if you want to be more specific in some specific paragraph with the Direct URL data structure link.