feat(pipewire): try to do some pulseaudio networking stuff

configs/default.nix

@@ -86,6 +86,7 @@ in {
         hashedPasswordFile = config.age.secrets.kfm-password.path;
         isNormalUser = true;
         uid = 1000;
+        extraGroups = ["pipewire" "audio"];
       };
 
       age.secrets = {

configs/sound.nix

@@ -1,9 +1,6 @@
 {pkgs, ...}: {
   sound.enable = true;
 
-  # realtime audio
-  security.rtkit.enable = true;
-
   services.pipewire = {
     enable = true;
     alsa = {
@@ -16,25 +13,19 @@
 
   systemd.user.services.pipewire-pulse.path = [pkgs.pulseaudio];
 
-  hardware.pulseaudio = {
-    enable = false;
-    package = pkgs.pulseaudioFull;
-    # copy server:/run/pulse/.config/pulse/cookie to client:~/.config/pulse/cookie to authenticate a client machine
-    zeroconf.discovery.enable = true;
-    extraConfig = ''
-      load-module ${
-        toString [
-          "module-tunnel-sink-new"
-          "server=zaatar.r"
-          "sink_name=zaatar"
-          "channels=2"
-          "rate=44100"
-        ]
-      }
-    '';
+  services.avahi = {
+    enable = true;
+    publish.enable = true;
+    publish.userServices = true;
   };
 
-  users.users.me.extraGroups = ["pipewire" "audio"];
+  environment.etc."pipewire/pipewire-pulse.conf.d/50-network-party.conf".text = ''
+    context.exec = [
+      { path = "pactl" args = "load-module module-native-protocol-tcp" }
+      { path = "pactl" args = "load-module module-zeroconf-discover" }
+      { path = "pactl" args = "load-module module-zeroconf-publish" }
+    ]
+  '';
 
   environment.systemPackages = [
     pkgs.pavucontrol

systems/zaatar/configuration.nix

@@ -12,12 +12,12 @@ in {
     ./gaslight.nix
     ./kiosk.nix
     ./hardware-configuration.nix
-    ./pulseaudio.nix
     ./home-assistant.nix
     ./mpd.nix
     ./grocy.nix
     ./spotifyd.nix
     ../../configs/keyboard.nix
+    ../../configs/sound.nix
     ../../configs/monitoring.nix
     ../../configs/retiolum.nix
     ../../configs/printing.nix

systems/zaatar/kiosk.nix

@@ -7,7 +7,7 @@
   users.extraUsers.kiosk = {
     isNormalUser = true;
     password = "";
-    extraGroups = ["audio"];
+    extraGroups = ["audio" "pipewire"];
   };
   # TODO https://github.com/cage-kiosk/cage/issues/138
   services.cage = {

systems/zaatar/mpd.nix

@@ -36,6 +36,8 @@ in {
     };
   };
 
+  users.users.${config.services.mpd.user}.extraGroups = ["pipewire"];
+
   services.mpd = {
     enable = true;
     network.listenAddress = "0.0.0.0";
@@ -44,7 +46,7 @@ in {
       auto_update "yes"
 
       audio_output {
-        type "pulse"
+        type "pipewire"
         name "zaatar single room audio system"
       }
     '';

systems/zaatar/pulseaudio.nix

@@ -1,17 +0,0 @@
-{pkgs, ...}: {
-  sound.enable = true;
-
-  environment.systemPackages = [pkgs.ncpamixer];
-
-  hardware.pulseaudio = {
-    package = pkgs.pulseaudioFull;
-    enable = true;
-    systemWide = true;
-    tcp = {
-      enable = true;
-      anonymousClients.allowedIpRanges = ["127.0.0.1" "10.243.2.0/24" "192.168.0.0/16"];
-    };
-    zeroconf.publish.enable = true;
-  };
-  networking.firewall.allowedTCPPorts = [4713];
-}

systems/zaatar/spotifyd.nix

@@ -3,7 +3,10 @@
     # mpris is a dbus service for controlling all music players with e.g. playerctl
     # I do not need this, because I only interact with the service via Spotify Connect
     # otherẃise it will pull in DBus which fails without X11
-    spotifyd = pkgs.spotifyd.overrideAttrs {withMPris = false;};
+    spotifyd = pkgs.spotifyd.overrideAttrs {
+      withMpris = false;
+      withKeyring = false;
+    };
   };
 
   services.spotifyd = {
@@ -12,7 +15,6 @@
       global = {
         username_cmd = "cat $CREDENTIALS_DIRECTORY/username";
         password_cmd = "cat $CREDENTIALS_DIRECTORY/password";
-        backend = "pulseaudio";
         bitrate = 320;
         device_type = "s_t_b"; # set-top box
         device_name = config.networking.hostName;
@@ -27,6 +29,8 @@
     ];
   };
 
+  networking.firewall.allowedTCPPorts = [4713];
+
   age.secrets = {
     spotify-username.file = ../../secrets/spotify-username.age;
     spotify-password.file = ../../secrets/spotify-password.age;