[bug#54986] [PATCH] gnu: mpd: Add support for socket activation.

[Ludovic Courtès]

Hi,

Liliana Marie Prikler <liliana.prikler@gmail.com> skribis:

> Am Montag, dem 01.05.2023 um 11:53 -0400 schrieb Maxim Cournoyer:
>> > > Like Ludovic, I'm wondering what duplicating the Shepherd
>> > > endpoints API in Guix buys us?  [...]
>> 
>> Instead of replicating the Shepherd API in Guix, could we use the
>> Shepherd API directly?  It's Scheme, and already depended on by Guix,
>> so the question arises.
> In theory, it'd be possible, albeit with some caveats:

It’s not just possible: several services in (gnu services …) and (gnu
home services …) use endpoints for systemd or inetd-style startup.

> 1. Shepherd doesn't (didn't) have a full guix-style records API, which
> might cause discrepancies in otherwise normal-looking Scheme code.

I’m not convinced.  :-)

> 2. It'd probably make shepherd a compile-time dependency, which is
> avoided in other places in the code, i.e. (gnu build shepherd)

(gnu build shepherd) is 75% deprecated; the introduction of endpoints in
the Shepherd didn’t have any effect on it.

> 3. Shepherd records are (to my knowledge) not print-readable, so we'd
> have to move them through G-Expressions through some of our own code
> anyway; how strongly that would replicate the API is up to
> debate/speculation.

When would you want to print those <endpoint> records?

Thanks,
Ludo’.