[bug#44276] [PATCH] gnu: Add python-simpleaudio.

[Leo Famulari]

On Wed, Oct 28, 2020 at 10:08:10AM +0100, Tanguy Le Carrour wrote:
> * gnu/packages/python-xyz.scm (python-simpleaudio): New variable.

> +    (native-inputs
> +      `(("alsa-lib" ,alsa-lib)))

After taking a closer look at the inputs in the pydub package, I noticed
that alsa-lib is a native-input; native-inputs are typically used only
while building the package.

The built package keeps a reference to alsa-lib:

------
$ guix gc --references $(./pre-inst-env guix build --no-grafts 
python-simpleaudio) | grep alsa-lib
/gnu/store/zcjdb23gbhl0pcnvvm8rnlprkfl43cv5-alsa-lib-1.2.2
$ grep -r alsa-lib $(./pre-inst-env guix build --no-grafts python-simpleaudio)  
       
Binary file 
/gnu/store/kaiww0wf6a7kqzrn9la681lmwmp2k26w-python-simpleaudio-1.0.4/lib/python3.8/site-packages/simpleaudio/_simpleaudio.cpython-38-x86_64-linux-gnu.so
 matches
------

Either the reference is used and should not be the "native alsa-lib" (in
terms of cross-compiling), or it's not used and we can remove the
reference after building. I think the first option is more likely.
Should I change it from a 'native-input' to an 'input'?

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