mpd-discord-rpc: init service (nix-community#2728)

.github/CODEOWNERS

@@ -340,6 +340,8 @@
 
 /modules/services/mpdris2.nix                         @pjones
 
+/modules/services/mpd-discord-rpc.nix                 @Kranzes
+
 /modules/services/mpris-proxy.nix                     @ThibautMarty
 
 /modules/services/muchsync.nix                        @pacien

modules/modules.nix

@@ -209,6 +209,7 @@ let
     ./services/mbsync.nix
     ./services/mpd.nix
     ./services/mpdris2.nix
+    ./services/mpd-discord-rpc.nix
     ./services/mpris-proxy.nix
     ./services/muchsync.nix
     ./services/network-manager-applet.nix

modules/services/mpd-discord-rpc.nix

@@ -0,0 +1,55 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.mpd-discord-rpc;
+  tomlFormat = pkgs.formats.toml { };
+  configFile = tomlFormat.generate "config.toml" cfg.settings;
+in {
+  meta.maintainers = [ maintainers.kranzes ];
+
+  options.services.mpd-discord-rpc = {
+    enable = mkEnableOption "the mpd-discord-rpc service";
+
+    settings = mkOption {
+      type = tomlFormat.type;
+      default = { };
+      example = literalExpression ''
+        {
+          hosts = [ "localhost:6600" ];
+          format = {
+            details = "$title";
+            state = "On $album by $artist";
+          };
+        }
+      '';
+      description = ''
+        Configuration included in <literal>config.toml</literal>.
+        For available options see <link xlink:href="https://github.com/JakeStanger/mpd-discord-rpc#configuration"/> 
+      '';
+    };
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.mpd-discord-rpc;
+      defaultText = literalExpression "pkgs.mpd-discord-rpc";
+      description = "mpd-discord-rpc package to use.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    xdg.configFile."discord-rpc/config.toml".source = configFile;
+
+    systemd.user.services.mpd-discord-rpc = {
+      Unit = {
+        Description = "Discord Rich Presence for MPD";
+        Documentation = "https://github.com/JakeStanger/mpd-discord-rpc";
+        After = [ "graphical-session-pre.target" ];
+        PartOf = [ "graphical-session.desktop" ];
+      };
+      Service.ExecStart = "${cfg.package}/bin/mpd-discord-rpc";
+      Install.WantedBy = [ "graphical-session.target" ];
+    };
+  };
+}