[bug#70570] [PATCH 2/2] guix: pyproject-build-system: Ignore unwanted pytest flags.

[Nicolas Graves]

On 2024-04-26 10:47, Lars-Dominik Braun wrote:

> Hi,
>
> pretty smart idea to use a pytest plugin :)
>
>> +;; Pytest plugin to filter out arguments to ignore.
>> +(define pytest-default-ignore-alist
>
> From the comment it’s not entirely clear to me what this list
> does. It’s a map from pytest plugin name to it’s pytest command line
> options, right?

Right, I'll update the command.

>
>> +;; Allow guix to ignore these options when underlying pytest package is not
>> +;; an input. These flags are not necessary to properly run tests.
>> +(define (pytest-ignore-options-plugin flags)
>> +  "This function converts an list of flags in a string that can
>> +  be instantiated as a python pytest plugin."
> …
>> +(define (call-with-guix-pytest-plugin inputs thunk)
>
> Same here. As far as I understand you want to emulate command line
> options provided by pytest plugins, so pytest won’t fail if the plugin
> is not present. And we only do that if the plugin is not an input to
> avoid clashing command line options, right?

Will do.
>
> +    for option in options:
> +        group.addoption(option, action='append', nargs='*')"
>
> Not sure nargs='*' is a good idea, since it might consume positional
> arguments intended for pytest. '?' would be a more conservative option,
> especially since we cannot override this easily per-package.

It works. I'll try with '?' then!

>
>> +  (let* ((former-path (getenv "PYTHONPATH"))
> …
>> +    (dynamic-wind
>> +      (lambda ()
>> +        (setenv "PYTHONPATH"
> …
>> +      (lambda ()
>> +        (setenv "PYTHONPATH" former-path)
>
> Isn’t it GUIX_PYTHONPATH?
>
 
I know it works this way. Could be GUIX_PYTHONPATH too, I'm not sure I
properly get the difference. Can test with GUIX_PYTHONPATH too, but in
any case it's just for the tests, so it should be cleared out
too. Should I?

> Lars
>

-- 
Best regards,
Nicolas Graves