Modules: Add mpd module

home/modules/mpd/default.nix

@@ -0,0 +1,71 @@
+{
+  config,
+  nixosConfig,
+  lib,
+  mylib,
+  pkgs,
+  ...
+}: let
+  inherit (config.modules) mpd;
+in {
+  options.modules.mpd = import ./options.nix {inherit lib mylib;};
+
+  config = lib.mkIf mpd.enable {
+    services.mpd = {
+      enable = true;
+      dataDir = "${config.home.homeDirectory}/Music/.mpd";
+      musicDirectory = "${config.home.homeDirectory}/Music";
+      network = {
+        listenAddress = "127.0.0.1"; # Listen on all addresses: "any"
+        port = 6600;
+      };
+      extraArgs = ["--verbose"];
+
+      extraConfig = ''
+        # Refresh the database whenever files in the musicDirectory change
+        auto_update "yes"
+
+        # Don't start playback after startup
+        restore_paused "yes"
+
+        # Use track tags on shuffle and album tags on album play (auto)
+        # Use album's tags (album)
+        # Use track's tags (track)
+        # replaygain "auto"
+
+        # PipeWire main output
+        audio_output {
+          type "pipewire"
+          name "PipeWire Sound Server"
+
+          # Use hardware mixer instead of software volume filter (replaygain_handler "software")
+          # mixer_type "hardware"
+          # replay_gain_handler "mixer"
+        }
+
+        # FiFo output for cava visualization
+        audio_output {
+          type   "fifo"
+          name   "my_fifo"
+          path   "/tmp/mpd.fifo"
+          format "44100:16:2"
+        }
+
+        # Pre-cache 1GB of the queue
+        # input_cache {
+        #   size "1 GB"
+        # }
+
+        # follow_outside_symlinks "no" # If mpd should follow symlinks pointing outside the musicDirectory
+        # follow_inside_symlinks "yes" # If mpd should follow symlinks pointing inside the musicDirectory
+      '';
+    };
+  };
+
+  # MPD integration with mpris (used by player-ctl).
+  # We want to use mpris as it also supports other players (e.g. Spotify) or browsers.
+  services.mpd-mpris = {
+    enable = true;
+    mpd.useLocal = true;
+  };
+}

home/modules/mpd/options.nix

@@ -0,0 +1,7 @@
+{
+  lib,
+  mylib,
+  ...
+}: {
+  enable = lib.mkEnableOption "Enable the Music Player Daemon";
+}