[Distutils] PEP 517 again

[Daniel Holth]

Wheel has always implemented dist info by converting from egg info. It is
necessary to invoke all of the egg info writers provided by setuptools or
tons of packages will break. But so far dist info has only been generated
as part of building a wheel.

On Sun, Sep 3, 2017, 22:01 Nathaniel Smith <njs at pobox.com> wrote:

> On Sun, Sep 3, 2017 at 11:14 AM, xoviat <xoviat at gmail.com> wrote:
> > Just an update for everyone here:
> >
> > 1. We're currently waiting on the implementation of the 'dist_info"
> command
> > in the wheel project.
> > 2. Once that is done we can switch pip over to reading dist-info rather
> than
> > egg_info.
> > 3. Then we can move the backend over to setuptools. Because Jacob has a
> much
> > more efficient release system than pip, I anticipate having a release of
> > setuptools first and then we can switch pip over to requiring a newer
> > setuptools via PEP 518.
>
> I don't think pip actually has any use for the PEP 517
> prepare_wheel_metadata hook right now though? Historically 'setup.py
> egg-info' was needed to kluge around unwanted behavior in 'setup.py
> install', but with a PEP 517 backend that's irrelevant because
> 'setup.py install' is never used. And in the future when pip has a
> real resolver, then prepare_wheel_metadata should allow some
> optimizations. But right now, prepare_wheel_metadata is completely
> useless AFAIK.
>
> So why is 'setup.py dist_info' a blocker for things?
>
> -n
>
> --
> Nathaniel J. Smith -- https://vorpus.org
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> Distutils-SIG maillist  -  Distutils-SIG at python.org
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