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(define-module (mirenn home services timer)
  #:use-module (guix gexp)
  #:use-module (gnu services)
  #:use-module (gnu services shepherd)
  #:use-module (gnu services configuration)
  #:use-module (gnu home services)
  #:use-module (gnu home services shepherd)

  #:export (home-timer-configuration))

(define-configuration/no-serialization home-timer-configuration
  (name
    symbol
    "Name of the timer.")
  (script
    local-file
    "Script to run on timeout.")
  (arguments
    (list string)
    "Arguments passed to the script.")
  (delay
    number
    "Timer delay in seconds."))

(define (home-timer-shepherd-service config)
  (list
    (shepherd-service
      (documentation "Run a periodic task")
      (provision (list (home-timer-configuration-name config)))
      (respawn? #t)
      (respawn-delay (home-timer-configuration-delay config))
      (start #~(make-forkexec-constructor
                 (cons #$(home-timer-configuration-script config)
                       #$(home-timer-configuration-arguments config))))
      (stop #~(make-kill-destructor)))))

(define-public home-timer-service-type
  (service-type
    (name 'home-timer')
    (extensions
      (list (service-extension home-shepherd-service-type home-timer-shepherd-service)))
    (description "Runs a script periodically based on a respawn delay")))