feat(systemModules:host): add initial host configuration module

used to define general host configuration, including:

- hardware
- name
- admin
- type
- role

system/modules/host/hardware/features/backlight/default.nix

@@ -0,0 +1,13 @@
+{ lib, config, ... }:
+
+let
+  features = config.systemModules.host.hardware.features;
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+in
+
+{
+  config = mkIf (elem "backlight" features) {
+    hardware.brillo.enable = true;
+  };
+}

system/modules/host/hardware/features/battery/default.nix

@@ -0,0 +1,94 @@
+
+{ lib, config, pkgs, ... }:
+
+let
+  features = config.systemModules.host.hardware.features;
+  cfg = config.systemModules.host.hardware.battery;
+  inherit (lib) mkIf mkDefault mkOption types;
+  inherit (builtins) elem;
+  MHz = x: x * 1000;
+in
+  
+{
+  options.systemModules.host.hardware.battery = {
+    powersave = {
+      minFreq = mkOption {
+        type = types.int;
+        default = 800;
+        description = "Minimum frequency for powersave mode in MHz";
+      };
+      maxFreq = mkOption {
+        type = types.int;
+        default = 1100;
+        description = "Maximum frequency for powersave mode in MHz";
+      };
+    };
+    performance = {
+      minFreq = mkOption {
+        type = types.int;
+        default = 1500;
+        description = "Minimum frequency for performance mode in MHz";
+      };
+      maxFreq = mkOption {
+        type = types.int;
+        default = 2600;
+        description = "Maximum frequency for performance mode in MHz";
+      };
+    };
+  };
+
+  config = mkIf (elem "battery" features) {
+    boot = {
+      kernelModules = ["acpi_call"];
+      extraModulePackages = with config.boot.kernelPackages; [
+        acpi_call
+        cpupower
+      ];
+    };
+
+    services = {
+      auto-cpufreq = {
+        enable = true;
+        settings = {
+          battery = {
+            governor = "powersave";
+            scaling_min_freq = mkDefault (MHz cfg.powersave.minFreq);
+            scaling_max_freq = mkDefault (MHz cfg.powersave.maxFreq);
+            turbo = "never";
+          };
+          charger = {
+            governor = "performance";
+            scaling_min_freq = mkDefault (MHz cfg.performance.minFreq);
+            scaling_max_freq = mkDefault (MHz cfg.performance.maxFreq);
+            turbo = "auto";
+          };
+        };
+      };
+
+      upower = {
+        enable = true;
+        percentageLow = 25;
+        percentageCritical = 5;
+        percentageAction = 3;
+        criticalPowerAction = "Hibernate";
+      };
+
+      undervolt = {
+        enable = true;
+        tempBat = 65;
+      };
+
+      thermald.enable = true;
+
+      power-profiles-daemon.enable = true;
+
+      logind = {
+        lidSwitch = "suspend";
+      };
+    };
+    environment.systemPackages = with pkgs; [
+      acpi
+      powertop
+    ];
+  };
+}

system/modules/host/hardware/features/bluetooth/default.nix

@@ -0,0 +1,24 @@
+{ config, lib, pkgs, ... }:
+
+let
+  features = config.systemModules.host.hardware.features;
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+in
+
+{
+  config = mkIf (elem "bluetooth" features) {
+    hardware.bluetooth = {
+      enable = true;
+      package = pkgs.bluez5-experimental;
+    };
+  
+    environment.systemPackages = with pkgs; [
+      live-buds-cli
+  	  bluetuith
+  	];
+
+    # https://github.com/NixOS/nixpkgs/issues/114222
+    systemd.user.services.telephony_client.enable = false;
+  };
+}

system/modules/host/hardware/features/default.nix

@@ -0,0 +1,20 @@
+{ lib, config, ... }:
+
+let
+  inherit (lib) types mkOption;
+in
+
+{
+  imports = [
+    ./bluetooth
+    ./backlight
+    ./battery
+    ./ssd
+  ];
+
+  options.systemModules.host.hardware.features = mkOption {
+    type = with types; listOf (enum ["bluetooth" "backlight" "battery" "ssd"]);
+    default = [];
+    description = "What extra hardware feature system modules to use";
+  };
+}

system/modules/host/hardware/features/ssd/default.nix

@@ -0,0 +1,23 @@
+{ lib, config, ... }:
+
+let
+  features = config.systemModules.host.hardware.ssd;
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+in
+
+{
+  config = mkIf (elem "ssd" features) {
+    services.fstrim = {
+      enable = true;
+    };
+    # only run fstrim while connected on AC
+    systemd.services.fstrim = {
+      unitConfig.ConditionACPower = true;
+      serviceConfig = {
+        Nice = 19;
+        IOSchedulingClass = "idle";
+      };
+    }; 
+  };
+}