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(define-module (oni home services emacs)
  #:use-module ((gnu services configuration)
                #:select (serialize-package
                          define-configuration))
  #:use-module ((gnu packages emacs)
                #:select (emacs))
  #:use-module ((gnu home services)
                #:select (service-type
                          service-extension
                          home-profile-service-type
                          home-files-service-type))
  #:use-module ((gnu home services shepherd)
                #:select (shepherd-service
                          home-shepherd-service-type))
  #:use-module ((guix gexp)
                #:select (gexp
                          file-append
                          local-file))
  #:use-module ((guix packages)
                #:select (package?))

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

(define-configuration home-emacs-configuration
  (package
   (package emacs)
   "Package to use for setting Emacs"))

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

(define (home-emacs-shepherd-service config)
  (list
   (shepherd-service
    (documentation "Start Emacs")
    (provision '(emacs))
    (auto-start? #t)
    (start
     #~(make-forkexec-constructor
        (list #$(file-append (home-emacs-configuration-package config) "/bin/emacs")
              "--fg-daemon")
        #:log-file (format #f "~a/.local/var/log/xbindkeys.log" (getenv "HOME"))))
    (stop #~(make-kill-destructor)))))

(define (home-emacs-config-files config)
  `((".emacs.d/init.el" ,(local-file "emacs/init.el"))))

(define home-emacs-service-type
  (service-type
   (name 'home-emacs)
   (extensions
    (list (service-extension
           home-profile-service-type
           add-emacs-packages)
          (service-extension
           home-shepherd-service-type
           home-emacs-shepherd-service)
          (service-extension
           home-files-service-type
           home-emacs-config-files)))
   (compose identity)
   (default-value (home-emacs-configuration))
   (description "Install and configure Emacs.")))