Python packaging policy?

[Hamish McIntyre-Bhatty]

On 20/01/2021 05:02, Marco Atzeri via Cygwin wrote:
> On 20.01.2021 00:02, Oleksandr Gavenko via Cygwin wrote:
>> I figured it out myself that I have to avoid "python3-*" packages and
>> instead
>> to work with "python36-*" or "python38-*" as "python3-*" packages are
>> marked
>> as "category: _obsolete" in setup.bz2.
>>
>> Are there any docs that describes policy for python packages in Cygwin?
>>
>> I had experience with
>> https://www.debian.org/doc/packaging-manuals/python-policy/
>> That document had answers to the most questions.
>
> Hi Ole,
> unfortunately not.
> We have not the bandwith to publish official documents as Debian.
> As you can see, that document is signed by all the maintainers that
> are probably working with python packages.
> The current team in Cygwin is one, and I took over from the previous
> maintainer when he decided to retire from the project.
>
> I addition Cygwin is a rolling distro so we need to
> maintanin some compatibility with the past as we evolve.
>
>> I tried to search for similar information under:
>>
>> /usr/share/doc/
>> /usr/share/doc/Cygwin
>>
>> and in
>>
>> git://cygwin.com/git/cygwin-htdocs.git
>>
>> and haven't succeeded.
>>
>> I'm interested in a package naming/versioning schema, a migration
>> path across
>> Python releases and the way of "pip install" to live in harmony with
>> Cygwin.
>>
>> I don't insist on anything particular but some "official" generic
>> guide how to
>> cook Python in Cygwin would be helpful.
>
> As you can seen from the several python announcements on the
> "cygwin-announce" mailing list
>
> https://sourceware.org/pipermail/cygwin-announce/
>
> ------------------------------------------------------------
> starting from April/June 2020 the work in progress is:
>
> -) update python-2.7, python-3.6, 3.7 and 3.8 at last versions
>
> python-2.7 is officially dead (EOL) upstream so only minor
> maintance is performed to "python27-*" packages
>
> python-3.5 is not updated anymore and will be removed in the future.
>
> -) move the meta-package python3 to pull python 3.8 instead of 3.6
>
> The retiring of python 3.6 is not too far, and some subpackages
> do not build anymore with it asking for at least 3.7.
>
> -) upload the "python38-*" for the majority of the subpackages
> most has been already done.
>
> Currently there are 158 / 159 / 122 packages for python 3.6/3.7/3.8
> and most of the difference is in obsoletes packages.
>
> -) work for python 3.9 will start after the rollout of 3.8 is completed.
> Probably a summer vacation excercise :-)
>
> -) check the packages still using python 2 and move the major ones to
> 3.8 (possibly)
>
> https://sourceware.org/pipermail/cygwin-apps/2021-January/040985.html
>
> -------------------------------------------------------------
>
> About the "pip install" please use 3.8 as your base
> and use "python3.8 -m pip .." to avoid misalignment
> between python and pip
>
> I plan to convert the test packages to stable
>
> https://cygwin.com/packages/summary/python38.html
>
> by this weekend or next one.
> There will be surely some fallout :-(
>
> After the switch or if you are already using the test packages,
> if you need to switch between the several python/python3
> possibilities, use "alternatives --config ...."
>
> $ alternatives --display python
> python - status is auto.
>  link currently points to /usr/bin/python3.8
> /usr/bin/python3.7 - priority 37
> /usr/bin/python2.7 - priority 27
> /usr/bin/python3.6 - priority 36
> /usr/bin/python3.8 - priority 38
> Current `best' version is /usr/bin/python3.8.
>
> $ alternatives --display python3
> python3 - status is auto.
>  link currently points to /usr/bin/python3.8
> /usr/bin/python3.7 - priority 37
> /usr/bin/python3.6 - priority 36
> /usr/bin/python3.8 - priority 38
> Current `best' version is /usr/bin/python3.8.
>
> If you (or others) need other clarification, let me know
> on this mailing list and I will try to clarify the matter.
>
> Regards
> Marco Atzeri
>
> Cygwin Python maintainer

Is python3-* still okay for source package names, eg python3-wx that I
maintain?

Hamish

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