feat(build): resolving PyPI deps with a SourceRecord Python

[lucascolley]

for python/cpython#142897

we should probably add a test

[nichmor]

I think in theory we could write a test with PassThrough backend ( to not build the source package ) and just validate that we are not getting the error.

But I'm also fine merging this without it.

[lucascolley]

If we don't want a test in-tree we should at least check it works locally. Can someone try with the manifest in the linked issue?

[nichmor]

If we don't want a test in-tree we should at least check it works locally. Can someone try with the manifest in the linked issue?

let me test it

[nichmor]

If we don't want a test in-tree we should at least check it works locally. Can someone try with the manifest in the linked issue?

I've tested and had a problem with lockfile validation. Pushed a small fix

[nichmor]

added also extra-slow tests to ensure that we are not breaking anything

[lucascolley]

confirmed that this is working, thanks Nichita!

[nichmor]

thanks @lucascolley !