From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Tip of the day: storing your GuixSD config in the instantiated
	system
Date: Mon, 28 Aug 2017 14:04:18 +0200
Message-ID: <877exngapp.fsf@gnu.org>
References: <871snzfl4s.fsf@gnu.org> <87a82mp2jq.fsf@gmail.com>
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In-Reply-To: <87a82mp2jq.fsf@gmail.com> (Mekeor Melire's message of "Sat, 26
	Aug 2017 21:11:21 +0200")
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To: Mekeor Melire <mekeor.melire@gmail.com>
Cc: help-guix <help-guix@gnu.org>

Hi Mekeor,

(I think you forgot to Cc: the list.)

Mekeor Melire <mekeor.melire@gmail.com> skribis:

> Ludovic Court=C3=A8s <ludo@gnu.org> writes:
>
>> Hello Guix!
>>
>> Following a discussion we had at the GHM today, here=E2=80=99s the tip o=
f the
>> day!
>
> Greetings to everyone at GHM!
>
>> 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-loc=
ation)
>>                                                      '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.
>
> Because of the frequent demand for it, I think it would make sense to
> offer this as pre-defined service by default, as part of Guix itself.
> What do you think?

Why not, indeed.  I think this would have to be a macro so that the
=E2=80=98current-source-location=E2=80=99 trick works as expected, nothing
insurmountable.

Ludo=E2=80=99.