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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Peter Mikkelsen <petermikkelsen10@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 services audio)
+ #:use-module (guix gexp)
+ #:use-module (gnu services)
+ #:use-module (gnu services shepherd)
+ #:use-module (gnu packages mpd)
+ #:use-module (guix records)
+ #:use-module (ice-9 match)
+ #:export (mpd-configuration
+ mpd-configuration?
+ mpd-service-type))
+
+;;; Commentary:
+;;;
+;;; Audio related services
+;;;
+;;; Code:
+
+(define-record-type* <mpd-configuration>
+ mpd-configuration make-mpd-configuration
+ mpd-configuration?
+ (user mpd-configuration-user
+ (default "mpd"))
+ (music-dir mpd-configuration-music-dir
+ (default "~/Music"))
+ (playlist-dir mpd-configuration-playlist-dir
+ (default "~/.mpd/playlists"))
+ (port mpd-configuration-port
+ (default "6600"))
+ (address mpd-configuration-address
+ (default "any"))
+ (pid-file mpd-configuration-pid-file
+ (default "/var/run/mpd.pid")))
+
+(define (mpd-config->file config)
+ (apply
+ mixed-text-file "mpd.conf"
+ "audio_output {\n"
+ " type \"pulse\"\n"
+ " name \"MPD\"\n"
+ "}\n"
+ (map (match-lambda
+ ((config-name config-val)
+ (string-append config-name " \"" (config-val config) "\"\n")))
+ `(("user" ,mpd-configuration-user)
+ ("music_directory" ,mpd-configuration-music-dir)
+ ("playlist_directory" ,mpd-configuration-playlist-dir)
+ ("port" ,mpd-configuration-port)
+ ("bind_to_address" ,mpd-configuration-address)
+ ("pid_file" ,mpd-configuration-pid-file)))))
+
+(define (mpd-service config)
+ (shepherd-service
+ (documentation "Run the MPD (Music Player Daemon)")
+ (provision '(mpd))
+ (start #~(make-forkexec-constructor
+ (list #$(file-append mpd "/bin/mpd")
+ "--no-daemon"
+ #$(mpd-config->file config))
+ #:pid-file #$(mpd-configuration-pid-file config)))
+ (stop #~(make-kill-destructor))))
+
+(define mpd-service-type
+ (service-type
+ (name 'mpd)
+ (extensions
+ (list (service-extension shepherd-root-service-type
+ (compose list mpd-service))))
+ (default-value (mpd-configuration))))