[bug#66557] [PATCH] home: services: Add goimapnotify service.

[Nils Landt <nils@landt.email>]

Thank you for the feedback, I'll work on implementing it, hopefully on the weekend. 

I've already added a few comments / questions below though.

> Bruno Victal <mirai@makinata.eu> hat am 20.11.2023 18:16 CET ls,
> 
> On 2023-10-15 15:01, Nils Landt wrote:
> > This patch adds a home service for generating goimapnotify JSON
> > configuration files.
> 
> […]
> 
> Not a goimapnotify user but this looks like a daemon application.
> I don't like this design much, I think goimapnotify should be launched and managed
> using shepherd instead of simply exposing these files to the user.

These options can not be given as command line options, they need to be in a config file.
Personally I don't use shepherd, so I won't be contributing shepherd services :)

> > +@item @code{username-cmd} (type: maybe-string-or-file-like)
> > +An executable or script that retrieves your username from
> > +somewhere, we cannot pass arguments to this command from Stdin.
> 
> I'd prefer to write it as “stdin” (lowercase) or expand it to “standard input”.

I think this a good change, and I'm completely fine making it. I just want to mention that I copied these docstrings directly from the project's readme. But I see no reason why the author would capitalize it.

> > +(define (list-of-goimapnotify-accounts? lst)
> > +  "List is in the form of '((file-name file-like))"
> > +  (every (lambda (element)
> > +           (match element
> > +                  ((string ($ <goimapnotify-account>))
> > +                   #t)
> > +                  (_ #f)))
> > +         lst))
> 
> You can replace this with:
> --8<---------------cut here---------------start------------->8---
> (define list-of-goimapnotify-accounts?
>   (list-of goimapnotify-account?))
> --8<---------------cut here---------------end--------------->8---

Wouldn't that fail because it expects '(goimapnotify-account goimapnotify-account[...])?

> This looks misindented, the .dir-locals file automatically handles
> this if you are using emacs.

I'm using vim. The code is indented with autoindent, as mentioned on https://guix.gnu.org/manual/devel/en/html_node/Vim-and-NeoVim.html . If this doesn't match the expected indentation as implemented in Emacs, I'd be grateful if you could indent this file before merging.