Re: Defining custom services in /etc/config.scm

[Carlo Zancanaro]

Hi Sergiu!

On Mon, Jan 25 2021, Sergiu Ivanov wrote:
> I understand that I should somehow construct a <service> (?) 
> from my <shepherd-service>, but I don't see a way to do it.

Unfortunately Guix overloads the word "service", where we have (a) 
services that consist of structured modifications to an operating 
system, and (b) shepherd services that define a process that will 
run on the resulting system. Shepherd services cannot be used 
directly, but need to be added to an instance of the 
shepherd-root-service-type service. The easiest way to do this is 
to use simple-service (documented in "(guix) Service Reference" in 
the manual).

Putting it together, this should return a service object which 
runs your redshift shepherd service:

 (simple-service 'redshift-service 'shepherd-root-service-type 
 (list redshift-service))

I hope that helps!

Carlo