Re: Resize Filesystem Service

[Wicki Gabriel (wicg)]

Hi

Thanks for the input, Felix.  I finally managed to get it to work (with 
additional input from ludo).  I attach the service to this mail.  If people 
think this might be a nice-to-have in upstream guix i'll happily craft a patch.

g
________________________________
From: Felix Lechner <felix.lechner@lease-up.com>
Sent: Monday, December 4, 2023 9:18 PM
To: Wicki Gabriel (wicg) <wicg@zhaw.ch>; help-guix@gnu.org <help-guix@gnu.org>
Subject: Re: Resize Filesystem Service

Hi Gabriel,

On Mon, Dec 04 2023, Wicki Gabriel wrote:

> I crafted the service in the file attached but this doesn't work and i
> neither know where to look nor how to debug the issue.

Writing services is probably more complex than it should be, but it can
be done.

Please have a look at the cachefilesd-service [1] which I wrote together
with Bruno Victal (mirai) and which was accepted, or the Heimdal
Kerberos services that are still waiting for review. [2]

My most immediate suggestion is that I would use define-configuration
even when no serialization (which helps write configuration files) is
needed. Also, you have to think carefully about where to place the
G-Expressions, which can be tough to wrap your mind arround. Finally, I
would use "file-append" instead of string-append for some of the
configurable executable paths.

Kind regards
Felix

[1] https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/services/linux.scm#n492
[2] https://issues.guix.gnu.org/67555

resize-fs.scm
Description: resize-fs.scm