Massive refactoring in configurable modules

general.nix

@@ -0,0 +1,92 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  cfg = config.aviallon.general;
+in
+{
+  options.aviallon.general = {
+    enable = mkOption {
+      default = true;
+      example = false;
+      description = "Enable aviallon's general tuning";
+      type = types.bool;
+    };
+    cpuArch = mkOption {
+      default = "x86-64";
+      example = "x86-64-v2";
+      description = "Set CPU arch used in overlays, ...";
+      type = types.str;
+    };
+    cpuTune = mkOption {
+      default = "generic";
+      example = "sandybridge";
+      description = "Set CPU tuning for compilers";
+      type = types.str;
+    };
+    unsafeOptimizations = mkEnableOption "unsafe system tuning";
+  };
+
+  config = mkIf cfg.enable {
+    # Set your time zone.
+    time.timeZone = "Europe/Paris";
+
+    # Select internationalisation properties.
+    i18n = {
+      defaultLocale = "fr_FR.UTF-8";
+    };
+
+    console = {
+      keyMap = "fr-pc";
+      font = "Lat2-Terminus16";
+    };
+
+    boot.kernelParams = concatLists [
+      (optional cfg.unsafeOptimizations "mitigations=off")
+    ];
+
+    powerManagement.cpuFreqGovernor = mkDefault "schedutil";
+
+    # Some programs need SUID wrappers, can be configured further or are
+    # started in user sessions.
+    programs.mtr.enable = true;
+    programs.gnupg.agent = {
+      enable = true;
+      enableSSHSupport = true;
+    };
+
+    nix.gc.automatic = mkDefault true;
+    nix.gc.randomizedDelaySec = "30min";
+    nix.optimise.automatic = mkDefault true;
+
+    nix.daemonIOSchedPriority = 5;
+    nix.daemonCPUSchedPolicy = "batch";
+    nix.daemonIOSchedClass = "idle";
+
+    system.autoUpgrade.enable = mkDefault true;
+    system.autoUpgrade.allowReboot = mkOverride 500 true;
+    system.autoUpgrade.dates = "00:00";
+
+
+    nixpkgs.localSystem.system = builtins.currentSystem;
+    nixpkgs.localSystem.platform  = lib.systems.platforms.pc // {
+      gcc.arch = cfg.cpuArch;
+      gcc.tune = cfg.cpuTune;
+    };
+
+    nix.buildMachines = [
+      {
+        hostName = "lesviallon.fr";
+        system = "x86_64-linux";
+        maxJobs = 2;
+        speedFactor = 4;
+        supportedFeatures = [ "kvm" "benchmark" "big-parallel" ];
+      }
+    ];
+    nix.distributedBuilds = mkDefault false;
+
+    nix.extraOptions = ''
+      builders-use-substitutes = true
+    '';
+  };
+
+}