bug#36641: [PATCH] gnu: python-gst: Fix build failure.

[Christopher Baines]

Marius Bakke <address@hidden> writes:

> Christopher Baines <address@hidden> writes:
>
>> Building python-gst fails with:
>>
>>   Unbound variable: python-version
>>
>> Therefore, add python-build-system to #:modules so that it's imported, and
>> give it a prefix to avoid clashing with the gnu-build-system.
>>
>> Also, simplify the code by using the site-packages function from the
>> python-build-system module.
>>
>> * gnu/packages/gstreamer.scm (python-gst)[arguments]: Rework to fix build
>> failure.
>> ---
>>  gnu/packages/gstreamer.scm | 15 ++++++---------
>>  1 file changed, 6 insertions(+), 9 deletions(-)
>>
>> diff --git a/gnu/packages/gstreamer.scm b/gnu/packages/gstreamer.scm
>> index b0f0b032b3..efb9a6f796 100644
>> --- a/gnu/packages/gstreamer.scm
>> +++ b/gnu/packages/gstreamer.scm
>> @@ -431,17 +431,14 @@ compression formats through the use of the libav 
>> library.")
>>                  "0f1d9rvy2qxlymmfzyknnfr5rz1vx69jv17gp7wnamc5s6p7mp2m"))))
>>      (build-system gnu-build-system)
>>      (arguments
>> -     ;; XXX: Factorize python-sitedir with python-build-system.
>> -     `(#:imported-modules (,@%gnu-build-system-modules
>> +     `(#:modules ((guix build gnu-build-system)
>> +                  ((guix build python-build-system) #:prefix python:))
>> +       #:imported-modules (,@%gnu-build-system-modules
>>                             (guix build python-build-system))
>>         #:configure-flags
>> -       (let* ((python (assoc-ref %build-inputs "python"))
>> -              (python-version (python-version python))
>> -              (python-sitedir (string-append
>> -                               "lib/python" python-version 
>> "/site-packages")))
>> -         (list (string-append
>> -                "--with-pygi-overrides-dir=" %output "/" python-sitedir
>> -                "/gi/overrides")))))
>> +       (list (string-append
>> +              "--with-pygi-overrides-dir=" %output "/"
>
> Nitpicking, but since we're refactoring, could you also change %output
> to the less magical (assoc-ref %outputs "out")?

Actually, turns out that most of the stuff there was
redundant. python:site-packages did more than I was expecting, so I've
removed the use of %output entirely.

>> +              (python:site-packages %build-inputs %outputs) 
>> "/gi/overrides"))))
>
> Neat!  LGTM.

Great, I've pushed this now.

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