Re: Automated /etc/config.scm

["Marek Paśnikowski" <marek@marekpasnikowski.pl>]

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26.05.2024 22:51:33 CEST Richard Sent:
> Hi Marek!
> 
> > I have already built the infrastructure to host my configurations on my
> > home server.  I would like now to ditch the configuration repositories'
> > clones in the home directories on my computers and rely entirely on the
> > combination of the system-wide channels (this I have implemented) and the
> > /etc/config.scm file.
> > 
> > Is there a way to have 'guix pull' edit the /etc/config.scm file to mirror
> > the designated system configuration file? I assume that any module
> > imports are handled by an existing guix infrastructure, because I had no
> > need to use the -L switch during reconfigurations for a while.
>
> If your channel includes the configuration files for the target
> machines and you are successfully adding those channels to the system,
> you could take advantage of Guix's -e flag. e.g.
> 
> --8<---------------cut here---------------start------------->8---
> $ guix system reconfigure -e '(@ (my-custom-channel machines this-machine)
> use-this-system)'
> --8<---------------cut here---------------end--------------->8---

Yes! This is exactly what I hoped for! Thank you very much.  For anyone 
reading this in the future: the code is '(@ module-name procedure-name)'.
The operating-system record needs to be named with a define-public.

> When combined with unattended-upgrade-service-type [1] and embeddeding a
> "self-referential" channels.scm file in your configuration [2] (a
> channels.scm file that contains it's own repository), your systems would
> regularly reconfigure themselves using the newest versions of your
> channel machine configuration files.

Sounds lovely, but I would need to construct a continuous integration 
subsystem to be to able to use it.  I tend to experiment a lot while 
programming and I do not trust myself to just upgrade automatically to the 
newest revision of my code.  Most of my reconfigures fail, due to any number 
of reasons.

Now I really need to come up with a nice channel / distribution name.  The 
number of modules in my codebase is about to explode and I can already tell 
that renaming them after the fact would be… painful and tedious.

> [1]:
> https://git.sr.ht/~freakingpenguin/rsent/tree/
1b79ec8a91a9546d4cc158590b1d50145e5fe42a/item/rsent/machines/droplets/
rampart.scm#L69
> [2]:
> https://git.sr.ht/~freakingpenguin/rsent/tree/
1b79ec8a91a9546d4cc158590b1d50145e5fe42a/item/rsent/configs/channel.scm#L13


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