zero/home-environments/radio/shepherd-services.scm

(define-module (home-environments radio shepherd-services)
  #:use-module (guix gexp)
  #:use-module (gnu services shepherd)
  #:use-module (shepherd service timer)

  #:export (repl timer wake-up))

#|Repl|#
(define repl
  (shepherd-service
    (provision '(repl))
    (modules '((shepherd service repl)))
    (free-form #~(repl-service))))

#|Timers|#
(define timer
  (shepherd-service
    (provision '(timer))
    (modules '((shepherd service timer)))
    (free-form #~(timer-service))))

(define timer-trigger-action
  (shepherd-action
    (name 'trigger)
    (procedure #~trigger-timer)
    (documentation
      "Trigger the action associated with @var{timer} as if it had reached its
next calendar event.")))

(define wake-up
  (shepherd-service
    (provision '(wake-up))
    (modules '((shepherd service timer)))
    (start #~(make-timer-constructor
               (calendar-event #:hours '(6) #:minutes '(0))
               (lambda ()
                 (spawn-shell-command "mpv --shuffle ~/media/music/by-artist"))))
    (stop #~(make-timer-destructor))
    (actions (list timer-trigger-action))))