[Distutils] status check on PEP 517

[Leonardo Rochael Almeida]

Hi Thomas,

On 28 July 2017 at 16:53, Thomas Kluyver <thomas at kluyver.me.uk> wrote:

>
> [...] I have a nagging concern about something that someone mentioned ages
> ago: does it make sense for building sdists and building wheels to be part
> of the same backend?
>
> [...]
>
> So I'd like us to circle back round and reconsider allowing projects to
> specify 'use tool X to make wheels, and tool Y to make sdists'. If everyone
> else thinks that's unnecessary, I think we'd all be glad to finish this
> discussion up, but this concern has been growing in my mind for a while,
> and I want to get it out there before we finalise the PEP.
>

Great, now you've planted your nagging concern on my mind as well ;-)

What would using different backends for sdist and wheel look like?
Something like this?

# pyproject.toml
[build-system]
requires = ["sdister", "wheeler"]
source-backend = "sdister.api:main"
build-backend = "wheeler.api:main"

If it's something like the above (or even, if it's a different section
(`source-system`? I'm trying hard to avoid the `sdist` word), then perhaps
this could be developed in a future pep without much issue. considering
what Daniel just reminded us about tools being able to claim ignorance on
how to develop sdists.

But if it's also that simple, maybe it could be added to this pep (/me
ducks).
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