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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu installer services)
+ #:use-module (guix records)
+ #:export (<desktop-environment>
+ desktop-environment
+ make-desktop-environment
+ desktop-environment-name
+ desktop-environment-snippet
+
+ %desktop-environments
+ desktop-environments->configuration))
+
+(define-record-type* <desktop-environment>
+ desktop-environment make-desktop-environment
+ desktop-environment?
+ (name desktop-environment-name) ;string
+ (snippet desktop-environment-snippet)) ;symbol
+
+;; This is the list of desktop environments supported as services.
+(define %desktop-environments
+ (list
+ (desktop-environment
+ (name "GNOME")
+ (snippet '(gnome-desktop-service)))
+ (desktop-environment
+ (name "Xfce")
+ (snippet '(xfce-desktop-service)))
+ (desktop-environment
+ (name "MATE")
+ (snippet '(mate-desktop-service)))
+ (desktop-environment
+ (name "Enlightenment")
+ (snippet '(service enlightenment-desktop-service-type)))))
+
+(define (desktop-environments->configuration desktop-environments)
+ "Return the configuration field for DESKTOP-ENVIRONMENTS."
+ (let ((snippets
+ (map desktop-environment-snippet desktop-environments)))
+ `(,@(if (null? snippets)
+ '()
+ `((services (cons* ,@snippets
+ %desktop-services)))))))