Moving Basic Audio Config To nixos Module

hosts/envy/audio.nix

@@ -0,0 +1,30 @@
+{ config, lib, pkgs, ... }:
+{
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    # If you want to use JACK applications, uncomment this
+    #jack.enable = true;
+
+    # use the example session manager (no others are packaged yet so this is enabled by default,
+    # no need to redefine it in your config for now)
+    #media-session.enable = true;
+  };
+  systemd.user.services.pipewire-patching = {
+    enable = true;
+    description = "pipewire patches";
+
+    wantedBy = [ "default.target" ];
+
+    script = ''
+      ${pkgs.pipewire}/bin/pw-link alsa_input.pci-0000_0e_00.4.analog-stereo:capture_FL alsa_output.pci-0000_0e_00.4.iec958-stereo:playback_FL
+      ${pkgs.pipewire}/bin/pw-link alsa_input.pci-0000_0e_00.4.analog-stereo:capture_FR alsa_output.pci-0000_0e_00.4.iec958-stereo:playback_FR
+    '';
+  };
+}

hosts/envy/default.nix

@@ -13,6 +13,7 @@ inputs.nixpkgs.lib.nixosSystem {
     home-manager.nixosModules.home-manager
     sops-nix.nixosModules.sops
     ./hardware-configuration.nix
+    ./gui.nix
     ../../modules/common
     ../../modules/nixos
     {
@@ -36,26 +37,16 @@ inputs.nixpkgs.lib.nixosSystem {
       };
 
       # TODO: Temporary, remove eventually!
-      networking.networkmanager.enable = true;
       time.timeZone = "America/New_York";
       nix.settings.experimental-features = [ "nix-command" "flakes" ];
-      services.xserver.enable = true;
-      services.displayManager.sddm.enable = true;
-      services.xserver.desktopManager.plasma5.enable = true;
-      services.xserver.xkb = {
-        layout = "us";
-        variant = "";
-      };
       users.users.annika = {
         isNormalUser = true;
         description = "Annika Merris";
-        extraGroups = [ "networkmanager" "wheel" ];
+        extraGroups = [ "networkmanager" "wheel" "audio" ];
       };
       nixpkgs.config.allowUnfree = true;
       system.stateVersion = "23.11";
       home-manager.backupFileExtension = "backup";
-      services.openssh.enable = true;
-      services.flatpak.enable = true;
       hardware.bluetooth.enable = true;
       hardware.bluetooth.powerOnBoot = true;
       # Enable sound with pipewire.
@@ -75,8 +66,17 @@ inputs.nixpkgs.lib.nixosSystem {
         #media-session.enable = true;
       };
 
+      services.openssh = {
+        enable = true;
+        hostKeys = [
+          {
+            path = "/etc/ssh/ssh_host_ed25519_key";
+            type = "ed25519";
+          }
+        ];
+      };
 
-      gui.enable = true;
+      services.flatpak.enable = true;
       # Apps
       discord.enable = true;
       element.enable = true;

hosts/envy/gui.nix

@@ -0,0 +1,15 @@
+{ config, lib, pkgs, ... }:
+{
+  gui.enable = true;
+
+  services.xserver.enable = true;
+  services.displayManager.sddm.enable = true;
+  services.xserver = {
+    desktopManager.plasma5.enable = true;
+    xkb = {
+      layout = "us";
+      variant = "";
+    };
+  };
+  networking.networkmanager.enable = true;
+}

hosts/kim/audio.nix

@@ -1,21 +1,6 @@
 { config, lib, pkgs, ... }:
 {
-  # Enable sound with pipewire.
+  # Enable a passthrough from kim's line in port to her optical output.
-  sound.enable = true;
-  hardware.pulseaudio.enable = false;
-  security.rtkit.enable = true;
-  services.pipewire = {
-    enable = true;
-    alsa.enable = true;
-    alsa.support32Bit = true;
-    pulse.enable = true;
-    # If you want to use JACK applications, uncomment this
-    #jack.enable = true;
-
-    # use the example session manager (no others are packaged yet so this is enabled by default,
-    # no need to redefine it in your config for now)
-    #media-session.enable = true;
-  };
   systemd.user.services.pipewire-patching = {
     enable = true;
     description = "pipewire patches";

hosts/kim/default.nix

@@ -53,6 +53,9 @@ inputs.nixpkgs.lib.nixosSystem {
       hardware.bluetooth.enable = true;
       hardware.bluetooth.powerOnBoot = true;
 
+      # Enable hardware features
+      audio.enable = true;
+
       services.openssh.enable = true;
       services.flatpak.enable = true;
       # Apps

modules/nixos/hardware/audio.nix

@@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+{
+  options = {
+    audio = {
+      enable = lib.mkEnableOption {
+        description = "Enable audio via pipewire";
+        default = false;
+      };
+    };
+  };
+  config = lib.mkIf (config.audio.enable) {
+    # Enable sound with pipewire.
+    sound.enable = true;
+    hardware.pulseaudio.enable = false;
+    security.rtkit.enable = true;
+    services.pipewire = {
+      enable = true;
+      alsa.enable = true;
+      alsa.support32Bit = true;
+      pulse.enable = true;
+      # If you want to use JACK applications, uncomment this
+      #jack.enable = true;
+
+      # use the example session manager (no others are packaged yet so this is enabled by default,
+      # no need to redefine it in your config for now)
+      #media-session.enable = true;
+    };
+  };
+}

modules/nixos/hardware/default.nix

@@ -1,6 +1,7 @@
 { lib, ... }:
 {
   imports = [
+    ./audio.nix
     ./boot.nix
   ];