[Distutils] PEP 527 - Removing Un(der)used file types/extensions on PyPI

Daniel Holth dholth at gmail.com
Thu Aug 25 12:26:11 EDT 2016

Wheels have a sort order depending on the tag that is independent of the
order present in pypi. Sdists don't have anything like that.

On Thu, Aug 25, 2016, 12:15 Wes Turner <wes.turner at gmail.com> wrote:

> On Thu, Aug 25, 2016 at 11:11 AM, Donald Stufft <donald at stufft.io> wrote:
>> > On Aug 25, 2016, at 11:46 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>> >
>> > You may not be aware, but developers that work on both Windows
>> > and Unix often have two sets of source code packages: one using
>> > Windows line ends, the other using Unix ones.
>> >
>> > The Windows ones can also include code which is only relevant
>> > on Windows while the Unix one includes parts that are only used
>> > on Unix, so having two sets (ZIP for Windows and .tar.gz for Unix)
>> > is a natural way to distribute your source code for those two
>> > target systems.
>> >
>> > Standardizing on two sdist formats is fine, but artificially
>> > limiting this to just one sdist upload removes useful
>> > functionality.
>> Well, except this doesn’t actually work in practice and anyone
>> doing this has a broken sdist. Neither pip nor setuptools is going
>> to consider a ``.tar.gz`` as a “Linux” sdist nor a ``.zip`` as a
>> “Windows” sdist and which one they happen to pick is basically an
>> implementation detail (in the latest version of pip, it’ll use
>> whichever one appears first in the /simple/<whatever>/ page.
> Is that because there wasn't an OrderedDict
> (either in the data producer (pypi, warehouse) or in the data consumer
> (pip, easy_install)?
>> In fact people doing this (which I am entirely sure is not common,
>> but I’m sure there is someone doing it) are likely to be the cause
>> of the weird issues that this part of the PEP is attempting to
>> prevent. Someone who happens to get the “Windows” sdist on Linux
>> and then is incredibly confused when it doesn’t have the Linux pieces
>> they need (and remember, none of the tooling supports the idea that
>> .tar.gz is for Linux and .zip is for Windows, so who knows which one
>> they’ll get). Of course, if the only difference is Windows vs Unix
>> line endings it’ll be ~roughly fine because Unix line endings work
>> fine on Windows, and Windows line endings work fine on Unix, but
>> shipping line ending differences to the correct OS is not a good
>> enough reason to keep this.
>>>> Donald Stufft
>> _______________________________________________
>> Distutils-SIG maillist  -  Distutils-SIG at python.org
>> https://mail.python.org/mailman/listinfo/distutils-sig
> _______________________________________________
> Distutils-SIG maillist  -  Distutils-SIG at python.org
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