[bug#72803] Add restic commands to the restic-guix package

[paul via Guix-patches via <guix-patches@gnu.org>]

Hi Fabio,

thank you very much for your detailed testing and review.

On 9/3/24 00:50, Fabio Natali wrote:
> Perhaps this should now read "...the current job restic invokation..."
> or "...the current restic invokation...", as the action is no longer
> limited to "backup"?

Definitely, good catch.

>>       (program-file
>> -     "restic-backup-job.scm"
>> +     (string-append "restic-" action "-" name "-program.scm")
> Should 'name' be slug-ified in any way here? E.g. to avoid spaces,
> capital letters, symbols that might be confusing when part of a file
> name, etc.
It should, right. I'll use the same approach used for the 
home-dotfiles-service-type (i.e. replacing illegal characters with "-").
>> +  (define action-table
>> +    (map
>> +     (lambda (action)
>> +       (list action
>> +             (map (lambda (job)
>> +                    (list (restic-backup-job-name job)
>> +                          (restic-action-program job action)))
>> +                  jobs)))
>> +     ;; run is an alias for backup
>> +     (filter (lambda (a) (not (string=? a "run"))) supported-actions)))
> Could this be (marginally) simpler if we used two nested association
> lists? That way, 'get-program' might simply use 'assoc-ref' (twice) and
> 'assoc-table' would be redundant?
I thought that as well, in fact my first implementation was with Guile's 
vhashes but it appears that neither alists nor vhashesh can be correctly 
ungexped, or at least I didn't find a way to do so. This is why I'm 
using plain lists and I need assoc-table. If you have some pointer where 
I could look how to lower alists it would be very helpful.
> It'd be nice to have a little test suite for this, but in case this can
> be part of a future patch.

There are already some tests Richard made at #71639 , once they get in 
I'll make sure to expand them for additional restic-guix subcommands.

Thank your for your review Fabio, I'm sending a patchset addressing your 
comments.

giacomo