[Distutils] PEP 517 again

[Thomas Kluyver]

If pip does uses build_wheel directly, as Paul now prefers, I think we
can leave the NotImplemented/Error/None question for a later date. We
only want some way to signal "I can't do that" because a frontend might
try sdist->wheel with a fallback to making a wheel directly. If no
frontend is actually planning to do that, we can leave specifying it
until a frontend wants it.

Donald, what do you think? IIRC, you were most keen on going
sdist->wheel where possible, and I don't think you've commented on
Paul's suggestion yet (apologies if I've overlooked a response).

Thomas

On Mon, Aug 28, 2017, at 12:47 AM, Nathaniel Smith wrote:
> On Sun, Aug 27, 2017 at 4:27 PM, Greg Ewing <greg.ewing at canterbury.ac.nz>
> wrote:
> > Nathaniel Smith wrote:
> >>
> >> - creating an sdist failed for unexpected reasons, that need a human
> >> to sort out (due to a broken system, or bugs – hey, they happen – or
> >> ...)
> >
> >
> > I think that should still be reported via an exception. Returning
> > None should only be for the specific case that the backend doesn't
> > support the requested operation.
> 
> Well, you can't exactly say "if your code is buggy, then you should
> signal that by doing this well defined thing" :-). One of my
> objections to None is that it's very easy to return accidentally,
> i.e., buggy code *will* sometimes return None no matter what the spec
> says.
> 
> -n
> 
> -- 
> Nathaniel J. Smith -- https://vorpus.org
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