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

From: Maxim Cournoyer
Subject: bug#46028: [PATCH core-updates 0/2] Farewell to PYTHONPATH.
Date: Mon, 01 Feb 2021 13:35:52 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)


Maxim Cournoyer <> writes:

> Maxim Cournoyer <> writes:
>> Hi,
>> Maxim Cournoyer <> 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.



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