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(define-module (oni home services xmodmap)
  #:use-module (gnu services configuration)
  #:use-module (gnu packages xorg)
  #:use-module (gnu home services)
  #:use-module (gnu home services utils)
  #:use-module (guix packages)
  #:use-module (guix gexp)

  #:export (home-xmodmap-service-type
            home-xmodmap-configuration))

(define-configuration/no-serialization home-xmodmap-configuration
  (package
   (package xmodmap)
   "Package to use for setting Xmodmap")
  (auto-start?
   (boolean #t)
   "Should xmodmap be started automatically")
  (pointer
   (list '())
   "List of numbers indicating the order of numbers")
  (extra
   (text-config '())
   "Any other configuration settings."))

(define (serialize-xmodmap-config config)
  (let ((pointer (home-xmodmap-configuration-pointer config)))
    (string-append
     (if pointer
         (string-append "pointer = " (string-join (map number->string pointer) " ") "\n\n")
         "")
     (string-join (home-xmodmap-configuration-extra config) "\n" 'suffix))))

(define (xmodmap-home-config-file config)
  (mixed-text-file
   "Xmodmap"
   (serialize-xmodmap-config config)))

(define (add-xmodmap-packages config)
  (list (home-xmodmap-configuration-package config)))

(define (launch-xmodmap-gexp config)
  (let ((xmodmap (home-xmodmap-configuration-package config)))
    (if (home-xmodmap-configuration-auto-start? config)
        #~(system* #$(file-append xmodmap "/bin/xmodmap")
                   #$(xmodmap-home-config-file config))
        #~"")))

(define home-xmodmap-service-type
  (service-type
   (name 'home-xmodmap)
   (extensions
    (list (service-extension
           home-profile-service-type
           add-xmodmap-packages)
          (service-extension
           home-run-on-first-login-service-type
           launch-xmodmap-gexp)))
   (compose identity)
   (default-value (home-xmodmap-configuration))
   (description "Install and configure Xmodmap.")))