[Distutils] PEP 517 again

[xoviat]

> But I'm suspicious of the rationale that *there will be fewer frontends so
they should have more responsibility*.

To be fair, pip is currently struggling to keep up with project
requirements as it is, which has caused some frustration in the community
(not that the frustration isn't wrong, but I don't think it's not going to
resolve any problems). I don't see how having even more frontends will
resolve these manpower issues.

2017-08-28 14:32 GMT-05:00 Thomas Kluyver <thomas at kluyver.me.uk>:

> On Mon, Aug 28, 2017, at 08:20 PM, Paul Moore wrote:
> > Maybe we go fully to Nick's proposal that we don't mandate any sort of
> > consistency constraints in the PEP. That would mean pip *has* to go
> > sdist->wheel (because pip does need consistent behaviour), and
> > xoviat's setuptools backend can skip building a sdist on the way to
> > building a wheel. It also means that the build_wheel hook is
> > essentially unreliable in isolation, and that all frontends will
> > likely have to do the build_sdist->build_wheel with fallback to
> > inplace build_wheel dance that pip does. But we expect many less
> > frontends than backends, so maybe that's the right trade-off?
>
> I've mentioned this before, but I have little faith in our ability to
> predict that one side of an interface will be far more numerous than the
> other. This is partly from my experience with Jupyter, where we got that
> prediction completely wrong. But I also think it's quite plausible that
> many frontend tools will want to use this interface (to argue against
> myself, most will be Python tools, so they could theoretically share a
> common wrapper module - but I have some doubts about whether they will).
>
> I'm not saying we shouldn't do this - as Donald is firmly in favour and
> you're wavering, it seems the easier option to wrap the discussion up.
> But I'm suspicious of the rationale that *there will be fewer frontends
> so they should have more responsibility*.
>
> Thomas
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