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

[M.-A. Lemburg]

+sources of truth for a single version. Having multiple sdists often
times can
+account for strange bugs that only expose themselves based on which
sdist that
+the person used.

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.


On 25.08.2016 13:57, Donald Stufft wrote:
> 
>> On Aug 25, 2016, at 7:30 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:
>>
>> On 25 August 2016 at 06:48, Donald Stufft <donald at stufft.io> wrote:
>>> Ok, I’ve updated the PEP. You can see a diff at https://github.com/python/peps/pull/74/files or the entire PEP at https://www.python.org/dev/peps/pep-0527/ once that updated. However the primary differences are:
>>>
>>> * Added Nick Coghlan as the BDFL Delegate (Thanks Nick!).
>>> * Expanded upon rationale for dropping everything but sdist/wheel/egg.
>>> * Allow an sdist to be either .tar.gz or .zip, but still drop all other formats.
>>>
>>> Hopefully that can adequately address Marc-Andre’s concerns for the removal of the other file types, and the inclusion of .zip will address other folk’s concerns about losing .zip.
>>
>> Thanks for those updates.
>>
>> My one remaining question would be whether or not we have any projects
>> that are in the habit of uploading both .zip and .tar.gz for the same
>> release - if there are, the restriction to only one sdist per release
>> will need to be included in the notification message to maintainers.
>> (The introduction of that restriction could probably be clearer in the
>> PEP text as well - previously it was implied by the single extension,
>> but it may need to be called out more explicitly now that there are
>> two permitted options).
> 
> My querying shows that we have a total of 359 projects that have ever
> uploaded two sdists for a single release. Looking at the number of
> releases that have 2+ sdists per project, it appears like there are a
> handful that do it regularly, and then the vast bulk have only done it
> once or twice (see: https://bpaste.net/show/fdfce63673ec).
> 
> I’ve gone ahead and explicitly call out the restriction of a single
> sdist per release in the PEP, diff can be found online at
> https://github.com/python/peps/pull/75/files.
> 
>>
>> Aside from that, I'm inclined to give folks another few days to raise
>> questions and concerns, and then consider the PEP for acceptance early
>> next week.
>>
> 
> Sounds good.
> 
> 
> —
> Donald Stufft
> 
> 
> 
> _______________________________________________
> Distutils-SIG maillist  -  Distutils-SIG at python.org
> https://mail.python.org/mailman/listinfo/distutils-sig
> 

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