GNU bug report logs - #78580
[PATCH] pull: allow filtering which channels to pull from the CLI

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From: Sergey Trofimov <sarg <at> sarg.org.ru>
To: Sergio Pastor Pérez <sergio.pastorperez <at> gmail.com>
Cc: Josselin Poiret <dev <at> jpoiret.xyz>, Tobias Geerinckx-Rice <me <at> tobias.gr>, Maxim Cournoyer <maxim.cournoyer <at> gmail.com>, Simon Tournier <zimon.toutoune <at> gmail.com>, Mathieu Othacehe <othacehe <at> gnu.org>, Ludovic Courtès <ludo <at> gnu.org>, Gabriel Wicki <gabriel <at> erlikon.ch>, Christopher Baines <guix <at> cbaines.net>, 78580 <at> debbugs.gnu.org
Subject: [bug#78580] [PATCH v2] pull: allow filtering which channels to pull from the CLI
Date: Sun, 25 May 2025 09:30:46 +0200

Hi Sergio, 

Sergio Pastor Pérez <sergio.pastorperez <at> gmail.com> writes:

> Hello Sergey.
>
> Sergey Trofimov <sarg <at> sarg.org.ru> writes:
>>> +The optional @var{channels} argument filters the list of pulled channels
>>> +to those whose names match the given list.  The channel named @dfn{guix}
>>> +is always pulled.
>>>
>>
>> wouldn't it be better to let user decide whether `guix` channel has to
>> be pulled? The use-case is simple - I've made a change in my personal
>> channel and I want to apply it without risking to build missing /
>> download new substitutes of the main channel.
>
> Unfortunately this is not possible. That was my initial idea as well,
> but the `guix' channel is required. If you allow it to compose the list
> of channels to pull without the `guix' channel, you get this error:
> --8<---------------cut here---------------start------------->8---
> $ ./pre-inst-env guix pull rde
> Updating channel 'rde' from Git repository at 'https://git.sr.ht/~abcdw/rde'...
> Building from this channel:
>   rde       https://git.sr.ht/~abcdw/rde        bf8f628
> /home/pastor/projects/guix/puntos/dots/.config/guix/channels.scm:12:6: error: 'guix' channel is lacking
> hint: Make sure your list of channels contains one channel named `guix' providing the core of Guix.
> --8<---------------cut here---------------end--------------->8---
>
> Once thing we could do, is to pin the Guix channel to the current commit
> so it does not pull. I can try to implement that if you would like to
> have that behaviour.

It'd be nice, otherwise one would need to use `--commit=$(guix describe
...)` which might work, but is not that user friendly.

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