Sorry to bump into this so late, but: Would not 2a be more backward compatible than 2b? I mean people may have build environments/installs doing: - pip install setuptools-scm setuptools pbr - pip install os-system-level
This way you can bypass the setup requires of setuptools to use easy_install. With 2b there is no way to avoid setup requires elements to not trigger easy install; other than os-system-level (which requires pbr for setup) to switch to pyproject.toml. > OK, thanks for confirming that. I think everyone who made comments on my > proposal was ultimately saying something along the lines of "but I'm not > sufficiently bothered to make a fight over it". So in the interests of > bringing this discussion to a conclusion and moving on, I'm going to say that > we go with what I proposed: 1. It should be legal for pyproject.toml to *not* > contain a [build-system] section. 2. If a [build-system] section is present, > the requires key must be present. Tools should behave as follows: 1. If > [build-system] is present but requires is missing, they should raise an > error. 2. If [build-system] is missing, they should take one of the following > two approaches: a) Act as if pyproject.toml is missing altogether b) Act as > if [build-system] is present, with a requires value of ["setuptools", > "wheel"] Whether there is any practical difference between cases 2a and 2b is > tool-dependent. (It's not ideal that we don't make a recommendation between > 2a and 2b, but getting i nto the details of pip's isolation strategy hasn't really helped make the choice more obvious, and I doubt that any new tools without pip's backward compatibility requirements would behave differently in the two cases anyway). Brett - you offered to update the PEP, so I'll leave that step to you. Thanks to everyone for the helpful discussions and willingness to compromise on the final outcome :-) Paul -- Distutils-SIG mailing list -- distutils-sig@python.org To unsubscribe send an email to distutils-sig-le...@python.org https://mail.python.org/mm3/mailman3/lists/distutils-sig.python.org/ Message archived at https://mail.python.org/mm3/archives/list/distutils-sig@python.org/message/XLQILTH4E3JF52EZWJYVO63CLQEE5PVZ/ -- Distutils-SIG mailing list -- distutils-sig@python.org To unsubscribe send an email to distutils-sig-le...@python.org https://mail.python.org/mm3/mailman3/lists/distutils-sig.python.org/ Message archived at https://mail.python.org/mm3/archives/list/distutils-sig@python.org/message/PTNKGMJ6VGMTUXUWDQKI56FGZJCBDW3O/
