1 files changed, 92 insertions, 0 deletions
diff --git a/nixos/modules/services/audio/mpd.nix b/nixos/modules/services/audio/mpd.nix
new file mode 100644
index 00000000000..a9880dee20c
--- /dev/null
+++ b/nixos/modules/services/audio/mpd.nix
@@ -0,0 +1,92 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  uid = config.ids.uids.mpd;
+  gid = config.ids.gids.mpd;
+  cfg = config.services.mpd;
+
+  mpdConf = pkgs.writeText "mpd.conf" ''
+    music_directory     "${cfg.musicDirectory}"
+    playlist_directory  "${cfg.dataDir}/playlists"
+    db_file             "${cfg.dataDir}/tag_cache"
+    state_file          "${cfg.dataDir}/state"
+    sticker_file        "${cfg.dataDir}/sticker.sql"
+    log_file            "syslog"
+    user                "mpd"
+    ${cfg.extraConfig}
+  ''; 
+
+in {
+
+  ###### interface
+
+  options = { 
+
+    services.mpd = { 
+
+      enable = mkOption {
+        default = false;
+        description = ''
+          Whether to enable MPD, the music player daemon.
+        ''; 
+      };  
+
+      musicDirectory = mkOption {
+        default = "${cfg.dataDir}/music";
+        description = ''
+          Extra configuration added to the end of MPD's
+          configuration file, mpd.conf.
+        ''; 
+      };  
+
+      extraConfig = mkOption {
+        default = ""; 
+        description = ''
+          Extra directives added to to the end of MPD's configuration file,
+          mpd.conf. Basic configuration like file location and uid/gid
+          is added automatically to the beginning of the file.
+        ''; 
+      };  
+
+      dataDir = mkOption {
+        default = "/var/lib/mpd/";
+        description = ''
+          The directory where MPD stores its state, tag cache,
+          playlists etc.
+        ''; 
+      };  
+
+    };  
+
+  };  
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.services.mpd = {
+      after = [ "network.target" "sound.target" ];
+      description = "Music Player Daemon";
+      wantedBy = [ "multi-user.target" ];
+      path = [ pkgs.mpd ];
+      preStart = "mkdir -p ${cfg.dataDir} && chown -R mpd:mpd  ${cfg.dataDir}";
+      script = "exec mpd --no-daemon ${mpdConf}";
+    };
+
+    users.extraUsers.mpd = {
+      inherit uid;
+      group = "mpd";
+      extraGroups = [ "audio" ];
+      description = "Music Player Daemon user";
+      home = "${cfg.dataDir}";
+    };
+
+    users.extraGroups.mpd.gid = gid;
+
+  };
+
+}