add plasma-manager for plasma config

common/base-graphical/default.nix

@@ -14,5 +14,11 @@ in
 
   config = mkIf cfg.enable {
     services.xserver.enable = true;
+    services.libinput.enable = true;
+    services.printing.enable = true;
+
+    fonts.packages = with pkgs; [
+      corefonts
+    ];
   };
 }

common/environment.nix

@@ -16,6 +16,7 @@
     # used for nix config
     colmena
     agenix
+    rc2nix
   ];
 
   environment.wordlist.enable = true;

flake.lock

@@ -112,13 +112,37 @@
         "type": "github"
       }
     },
+    "plasma-manager": {
+      "inputs": {
+        "home-manager": [
+          "home-manager"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1725914634,
+        "narHash": "sha256-U74hu15xSb6JNySMOwyJrsh4uk1DVa182bdHLeHdYMc=",
+        "owner": "nix-community",
+        "repo": "plasma-manager",
+        "rev": "60becd0e994e25b372c8d0500fc944396f6c1085",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "plasma-manager",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "agenix": "agenix",
         "birdsong": "birdsong",
         "home-manager": "home-manager_2",
         "nixpkgs": "nixpkgs",
-        "nur": "nur"
+        "nur": "nur",
+        "plasma-manager": "plasma-manager"
       }
     },
     "systems": {

flake.nix

@@ -7,6 +7,12 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    plasma-manager = {
+      url = "github:nix-community/plasma-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.home-manager.follows = "home-manager";
+    };
+
     nur.url = "github:nix-community/NUR";
 
     agenix = {
@@ -20,7 +26,7 @@
     birdsong.url = "git+https://git.qenya.tel/qenya/birdsong?ref=main";
   };
 
-  outputs = inputs@{ self, nixpkgs, home-manager, nur, agenix, birdsong, ... }: {
+  outputs = inputs@{ self, nixpkgs, home-manager, plasma-manager, nur, agenix, birdsong, ... }: {
     colmena = {
       meta = {
         nixpkgs = import nixpkgs { system = "x86_64-linux"; };
@@ -38,12 +44,14 @@
 
         nixpkgs.config.packageOverrides = pkgs: {
           agenix = inputs.agenix.packages.${config.nixpkgs.hostPlatform.system}.default;
+          rc2nix = inputs.plasma-manager.packages.${config.nixpkgs.hostPlatform.system}.rc2nix;
         };
         nixpkgs.overlays = [ inputs.nur.overlay ];
 
         home-manager = {
           useUserPackages = true;
           useGlobalPkgs = true;
+          sharedModules = [ plasma-manager.homeManagerModules.plasma-manager ];
         };
 
         imports = [

home/qenya/default.nix

@@ -1,6 +1,7 @@
 {
   imports = [
     ./dconf
+    ./plasma
     ./cli.nix
     ./firefox.nix
     ./git.nix

home/qenya/firefox.nix

@@ -45,6 +45,10 @@
 
         "dom.private-attribution.submission.enabled" = false; # disable "Privacy-Preserving Attribution for Advertising"
         "extensions.autoDisableScopes" = 0; # automatically enable extensions installed through nix
+
+        # external password manager
+        "signon.rememberSignons" = false;
+        "extensions.formautofill.creditCards.enabled" = false;
       };
     };
   };

home/qenya/plasma/default.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, osConfig, ... }:
+
+let
+  isPlasma = osConfig.services.desktopManager.plasma6.enable || osConfig.services.xserver.desktopManager.plasma5.enable;
+in
+{
+  programs.plasma.enable = isPlasma;
+  programs.plasma.overrideConfig = true;
+
+  imports = [ ];
+}

hosts/kilgharrah/default.nix

@@ -24,7 +24,7 @@
   console.keyMap = "uk";
   services.xserver.xkb.layout = "gb";
 
-  services.printing.enable = true;
+  qenya.services.pipewire.lowLatency.enable = true;
 
   age.secrets.user-password-kilgharrah-qenya.file = ../../secrets/user-password-kilgharrah-qenya.age;
   users.users.qenya.hashedPasswordFile = config.age.secrets.user-password-kilgharrah-qenya.path;

hosts/tohru/default.nix

@@ -25,8 +25,6 @@
   console.keyMap = "uk";
   services.xserver.xkb.layout = "gb";
 
-  services.printing.enable = true;
-
   age.secrets.user-password-tohru-qenya.file = ../../secrets/user-password-tohru-qenya.age;
   users.users.qenya.hashedPasswordFile = config.age.secrets.user-password-tohru-qenya.path;
   users.users.qenya.extraGroups = [
@@ -38,7 +36,6 @@
 
   programs.evolution.enable = true; # not in home-manager yet; not declaratively configurable yet
   programs.steam.enable = true;
-  qenya.services.fonts.enable = true;
 
   system.stateVersion = "23.11";
 }

services/default.nix

@@ -1,6 +1,6 @@
 {
   imports = [
-    ./fonts.nix
     ./forgejo.nix
+    ./pipewire-low-latency.nix
   ];
 }

services/fonts.nix

@@ -1,17 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-let
-  cfg = config.qenya.services.fonts;
-in
-{
-  options.qenya.services.fonts = {
-    enable = mkEnableOption "Fonts";
-  };
-
-  config = mkIf cfg.enable {
-    fonts.packages = with pkgs; [
-      corefonts
-    ];
-  };
-}

services/pipewire-low-latency.nix

@@ -0,0 +1,58 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.qenya.services.pipewire.lowLatency;
+in
+{
+  options.qenya.services.pipewire.lowLatency = {
+    enable = mkEnableOption "config to decrease sound latency (increasing CPU load) for e.g. streaming";
+    # TODO: might be an idea to have the numbers be configurable
+  };
+
+  config = mkIf cfg.enable {
+    # TODO: needs more testing
+    services.pipewire.extraConfig = {
+      pipewire."92-low-latency" = {
+        context.properties = {
+          default.clock.rate = 48000;
+          default.clock.quantum = 32;
+          default.clock.min-quantum = 32;
+          default.clock.max-quantum = 32;
+        };
+      };
+      pipewire-pulse."92-low-latency" = {
+        context.modules = [
+          {
+            name = "libpipewire-module-protocol-pulse";
+            args = {
+              pulse.min.req = "32/48000";
+              pulse.default.req = "32/48000";
+              pulse.max.req = "32/48000";
+              pulse.min.quantum = "32/48000";
+              pulse.max.quantum = "32/48000";
+            };
+          }
+        ];
+        stream.properties = {
+          node.latency = "32/48000";
+          resample.quality = 1;
+        };
+      };
+    };
+    # Available from NixOS 24.11. Lifted from https://nixos.wiki/wiki/PipeWire - probably need to adjust numbers
+    # services.pipewire.wireplumber.extraLuaConfig.main."99-alsa-lowlatency" = ''
+    #   alsa_monitor.rules = {
+    #     {
+    #       matches = {{{ "node.name", "matches", "alsa_output.*" }}};
+    #       apply_properties = {
+    #         ["audio.format"] = "S32LE",
+    #         ["audio.rate"] = "96000", -- for USB soundcards it should be twice your desired rate
+    #         ["api.alsa.period-size"] = 2, -- defaults to 1024, tweak by trial-and-error
+    #         -- ["api.alsa.disable-batch"] = true, -- generally, USB soundcards use the batch mode
+    #       },
+    #     },
+    #   }
+    # '';
+  };
+}