From: Wojtek Kosior via "Development of GNU Guix and the GNU System distribution." <guix-devel@gnu.org>
To: Zhu Zihao <all_but_last@163.com>
Cc: jgart <jgart@dismail.de>, guix-devel@gnu.org
Subject: Re: foreign-distro?
Date: Wed, 23 Nov 2022 13:34:33 +0100 [thread overview]
Message-ID: <20221123133433.46c5d9ea@koszkonutek-tmp.pl.eu.org> (raw)
In-Reply-To: <86k03mvtu3.fsf@163.com>
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Hi all,
Sorry to tell this - I don't think something like this would be even
possible to implement :/
AFAIK package definition fields like `(inputs)` don't just describe how
the package gets installed. They affect the actual build. So if we
really wanted this feature, we'd need to build 2 separate variants of a
package - one for Guix system and one for foreign distros.
In addition to looking like an overkill, such separate build variants
could also require changes to existing utilities like `guix copy`.
Besides all this, It it not that easy to determine whether Guix is
running under a foreign distro. One idea would be to check whether the
currently-running init system is Shepherd. But what if the user is
running Guix commands inside a Guix system chroot? The Shepherd process
is not going to be visible in such case
Wojtek
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On Wed, 23 Nov 2022 18:36:49 +0800
Zhu Zihao <all_but_last@163.com> wrote:
> If you want to left the choice to user. You can just don't patch it. Or
> you can always patch it because user can still use package transformer
> to specify a custom ffmpeg.
>
>
> jgart <jgart@dismail.de> writes:
>
> > Does Guix have a declarative Guix API way of knowing if it is installing
> > a package into foreign distro versus Guix System?
> >
> > I'm thinking of a function like `foreign-distro?`:
> >
> > ```
> > (define-public peek
> > (package
> > (name "peek")
> > ...
> > (inputs
> > `(,@(if (foreign-distro?) `(("ffmpeg" ,ffmpeg)) '())))
> > ```
> >
> > The above includes ffmpeg in the inputs only if installing peek on a
> > foreign distro. It could additionally patch the ffmpeg executable in
> > a peek package phases if foreign-distro? returns #t.
> >
> > WDYT
>
>
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prev parent reply other threads:[~2022-11-23 12:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-20 20:54 foreign-distro? jgart
2022-11-20 22:08 ` foreign-distro? Julien Lepiller
2022-11-21 1:57 ` foreign-distro? Jake Shilling
2022-11-23 10:36 ` foreign-distro? Zhu Zihao
2022-11-23 12:34 ` Wojtek Kosior via Development of GNU Guix and the GNU System distribution. [this message]
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