From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Thompson, David" <dthompson2@worcester.edu>
Subject: Re: Fixing package-with-python2
Date: Mon, 1 Feb 2016 17:12:34 -0500
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To: =?UTF-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>

On Mon, Feb 1, 2016 at 5:07 PM, Ludovic Court=C3=A8s <ludo@gnu.org> wrote:
> "Thompson, David" <dthompson2@worcester.edu> skribis:
>
>> On Mon, Feb 1, 2016 at 8:06 AM, Efraim Flashner <efraim@flashner.co.il> =
wrote:
>>
>>> I looked over the commit but not deeply enough yet, would it be possibl=
e to
>>> use some of the logic in this to fix the package-with-python2 issue?
>>
>> Here's a potential solution for 'package-with-python2': module
>> introspection.
>
> Evil!  ;-)
>
> An idea I haven=E2=80=99t taken the time to test yet would be to use
> =E2=80=98properties=E2=80=99:
>
>   (define python-foobar   ;with Python 3
>     (package
>       (name "foobar")
>       ;; Specify which Python 2 variant to use.
>       (properties `((python2-variant . ,(delay python2-foobar))))))
>
>   (define python2-foobar
>     (package (inherit python-foobar)
>       ;; =E2=80=A6 stuff beyond the mechanical python 2=E2=86=923 switch=
=E2=80=A6
>       ))
>
> =E2=80=98package-with-python2=E2=80=99 would honor this =E2=80=98python2-=
variant=E2=80=99 property.
>
> Thoughts?

I'm happy that my evil suggestion got a better solution to show itself. :)

- Dave