feat: add mpd for beets' play plugin

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "Nydragon's NixOS configuration";
+  description = "Nydragon's system configuration";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
@@ -56,6 +56,7 @@
         { pkgs, inputs', ... }:
         {
           formatter = pkgs.nixfmt-rfc-style;
+
           devShells.default = pkgs.mkShell {
             buildInputs = with pkgs; [
               pre-commit

home/terminal/beets.nix

@@ -1,6 +1,13 @@
-{ pkgs, lib, ... }:
+{
+  pkgs,
+  lib,
+  osConfig,
+  config,
+  ...
+}:
 let
   inherit (lib) concatStringsSep listToAttrs;
+  inherit (lib.my) getExe;
   plugins = [
     "convert"
     "chroma"
@@ -14,10 +21,46 @@ let
     "missing"
     "unimported"
     "badfiles"
+    "embedart"
+    "play"
   ];
+
+  mkConf =
+    a:
+    let
+      mkGroup = name: values: ''
+        ${name} {
+            ${lib.concatStringsSep "\n\t" values}
+        }'';
+      stringify = lib.mapAttrsToList (
+        name: value:
+        if lib.isAttrs value then
+          mkGroup name (stringify value)
+        else if (lib.isInt value || lib.isFloat value) then
+          ''${name} "${toString value}"''
+        else
+          ''${name} "${value}"''
+      );
+    in
+    concatStringsSep "\n" (stringify a);
+
+  mpdSocket = "/run/user/${toString osConfig.users.users.${config.home.username}.uid}/mpd/socket";
 in
 {
   config = {
+    services.mpd = {
+      enable = true;
+      extraConfig = mkConf {
+        auto_update = "yes";
+        log_file = "syslog";
+        bind_to_address = mpdSocket;
+        audio_output = {
+          type = "pipewire";
+          name = "PipeWire Sound Server";
+        };
+      };
+    };
+
     programs.beets = {
       package = pkgs.beets.override {
         pluginOverrides = listToAttrs (
@@ -36,6 +79,26 @@ in
           format = "flac";
           never_convert_lossy_files = "yes";
         };
+        play = {
+          command =
+            let
+              mpc = "${getExe pkgs.mpc} --host=\"${mpdSocket}\"";
+              ncmpcpp = getExe pkgs.ncmpcpp;
+
+              command = pkgs.writers.writeFishBin "play-command" ''
+                set playlist "$argv[1]";
+                ${mpc} clear;
+                ${mpc} load "$playlist";
+                rm "$playlist";
+                ${mpc} play;
+                ${ncmpcpp} $args;
+              '';
+            in
+            "${command}/bin/play-command";
+        };
+        embedart = {
+          maxwidth = 500;
+        };
         fetchart = {
           auto = true;
           cover_format = "jpg";
@@ -67,7 +130,8 @@ in
           languages = "en";
         };
         item_fields = {
-          disc_and_track = "u'%02i.%02i' % (disc, track) if disctotal > 1 else u'%02i' % (track)";
+          disc_and_track = # python
+            "u'%02i.%02i' % (disc, track) if disctotal > 1 else u'%02i' % (track)";
           primary_albumartist = # python
             ''
               if albumartist.lower().strip().startswith(albumartists[0].lower().strip()):

modules/users/ny.nix

@@ -7,6 +7,7 @@
       "wheel"
     ];
     shell = pkgs.fish;
+    uid = 1000;
   };
   programs.fish.enable = true;
 }