[Distutils] Provisionally accepting PEP 517's declarative build system interface

Thomas Kluyver thomas at kluyver.me.uk
Wed May 31 15:12:27 EDT 2017

On Wed, May 31, 2017, at 07:40 PM, Donald Stufft wrote:
> Taking pip completely off the table a second, let’s take a look at
> tox. Tox’s default mode of operation is to produce a sdist. Now let’s
> say I’m writing a project that I want to use PEP 517 and get rid of
> setup.py, except now tox is broken with no path forward because PEP
> 517 doesn’t define how to produce a sdist.> 
> The same story is true for TravisCI’s PyPI deployment pipeline, as
> soon as any project starts depending on PEP 517, we completely break
> that feature for them without a path for them to fix it (besides
> writing a PEP of course).> 
> The same is true for Gem Fury’s private PyPI repositories where
> you can ``git push fury`` and have them build a sdist
> automatically for you.
These tools are all things that the developers of the project choose to
use, however. I don't use them, so I'm happy enough to get rid of
setup.py and not have a standard interface to building sdists.
Developers who do use them will want to stick with setup.py until
there's a standard way to build an sdist - or a tool like tox may add
support for going via wheels instead of via sdist.
So PEP 517 may not be useful to *everyone* without standardising a way
to build sdists, but it is still useful for many projects, and I don't
think it prevents a later PEP from standardising a way to build sdists.
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