From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Kost <alezost@gmail.com>
Subject: Re: Tip of the day: storing your GuixSD config in the instantiated
	system
Date: Mon, 28 Aug 2017 19:41:15 +0300
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In-Reply-To: <871snzfl4s.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Fri, 25 Aug 2017 22:27:47 +0200")
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: help-guix <help-guix@gnu.org>

Ludovic Court=C3=A8s (2017-08-25 22:27 +0200) wrote:

> Hello Guix!
>
> Following a discussion we had at the GHM today, here=E2=80=99s the tip of=
 the day!
>
> People often ask how they could store their GuixSD config alongside the
> instantiated system in the store.  Guix maintainers usually grumpily
> reply =E2=80=9Cnah, don=E2=80=99t do this, because the config file is not
> self-contained, so that=E2=80=99s not good enough.=E2=80=9D
>
> But wait: we can already store the config file in the instantiated
> system!  Here=E2=80=99s how:
>
>   (operating-system
>     ;; =E2=80=A6
>     (services (cons (simple-service 'store-my-config
>                                     etc-service-type
>                                     `(("config.scm"
>                                        ,(local-file (assoc-ref
>                                                      (current-source-loca=
tion)
>                                                      'filename)))))
>                     =E2=80=A6)))
>
> You instantiate that, and then /etc/config.scm (aka.
> /run/current-system/etc/config.scm,
> aka. /var/guix/profiles/system/etc/config.scm) contains the config file.
>
> Pretty neat no?

Nice tip indeed, thanks!

--=20
Alex