GNU bug report logs - #46028
[PATCH core-updates 0/2] Farewell to PYTHONPATH.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#46028: closed ([PATCH core-updates 0/2] Farewell to PYTHONPATH.)
Date: Mon, 01 Feb 2021 18:37:02 +0000

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Your message dated Mon, 01 Feb 2021 13:35:52 -0500
with message-id <878s87skjb.fsf_-_ <at> gmail.com>
and subject line Re: bug#46028: [PATCH core-updates 0/2] Farewell to PYTHONPATH.
has caused the debbugs.gnu.org bug report #46028,
regarding [PATCH core-updates 0/2] Farewell to PYTHONPATH.
to be marked as done.

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: guix-patches <at> gnu.org
Cc: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Subject: [PATCH core-updates 0/2] Farewell to PYTHONPATH.
Date: Thu, 21 Jan 2021 23:48:16 -0500

Farewell to PYTHONPATH.

Maxim Cournoyer (2):
  utils: Add a version-minor procedure.
  gnu: python: Replace PYTHONPATH by GUIX_PYTHONPATH_X_Y.

 gnu/packages/python.scm | 37 +++++++++++++++++++++++++++++++++----
 guix/utils.scm          | 15 ++++++++++++---
 2 files changed, 45 insertions(+), 7 deletions(-)

-- 
2.29.2

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: 46028-done <at> debbugs.gnu.org
Subject: Re: bug#46028: [PATCH core-updates 0/2] Farewell to PYTHONPATH.
Date: Mon, 01 Feb 2021 13:35:52 -0500

Hello,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>
>> Hi,
>>
>> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>>
>>> Using PYTHONPATH as a mean to discover the Python packages had the following
>>> issues:
>>>
>>>         1. It is not versioned, so different versions of Python would clash if
>>>         installed in a shared profile.
>>>
>>>         2. It would interfere with the host Python site on foreign
>>>         distributions, sometimes preventing a a user to login their GDM
>>>         session (!).
>>>
>>>         3. It would take precedence over user installed Python packages
>>>         installed through pip.
>>>
>>>         4. It would leak into Python virtualenvs, which are supposed to create
>>>         isolated Python environments.
>>
>> I've adapted the most problematic uses of PYTHONPATH in the code base
>> (mostly (getenv "PYTHONPATH"), which would typically now return #f and
>> pushed the branch to cu/farewell-to-pythonpath (it contains ~160
>> commits, so I thought it'd be easier to review as a branch).
>
> There's now a third version of this that I pushed to the
> cu/farewell-to-pythonpath branch.  It now uses GUIX_PYTHONPATH instead
> of GUIX_PYTHONPATH_X_Y, which makes it easier to use in any package
> definition (as there's no longer a need to import the (guix build
> python-build-system) module for packages not using the Python build
> system).
>
> I'll merge it soon if nobody has an objection.

I've now pushed this to core-updates.

Closing!

Maxim

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