[Distutils] Finishing up PEP 517

[Nick Coghlan]

Sorry, I also meant to reply to this part before hitting send.

On 28 June 2017 at 13:43, Nathaniel Smith <njs at pobox.com> wrote:
> I would say that there's only one required path, which is in-place.
> (But the tree that they do the in-place build in might have a more or
> less complicated history). It worries me that you seem to think that
> build_sdist and build_wheel should be coupled like this... this
> proliferation of cases and the reification of "out of tree builds" as
> a special thing that's different from an in-tree build in a temporary
> tree is already what worried me about prepare_wheel_input_files, and
> now it seems to be spreading :-).

I don't know what additional coupling you're seeing: the only coupling
is that building a wheel directly from a VCS source tree and first
exporting an sdist and then building a wheel from that *must give the
same result* (modulo any problems related to reproducible builds, or
the lack thereof). If a project can't meet that expectation, then
their sdist generation is broken, since it clearly isn't exporting the
necessary content to actually build the project properly.

If you weren't aware of that inherent coupling, and are surprised by
the fact that it's a constraint on publishing useful sdists, then I'd
consider it a good thing that PEP 517 is now making it more explicit.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia