Migrate to Snowfall (#1)

Reviewed-on: #1
Co-authored-by: Evan Reichard <evan@reichard.io>
Co-committed-by: Evan Reichard <evan@reichard.io>

modules/nixos/system/boot/default.nix

@@ -0,0 +1,52 @@
+{ config, lib, namespace, ... }:
+let
+  inherit (lib) mkIf mkDefault;
+
+  cfg = config.${namespace}.system.boot;
+in
+{
+  options.${namespace}.system.boot = {
+    enable = lib.mkEnableOption "Enable Boot";
+    xenGuest = lib.mkEnableOption "Enable Xen Guest";
+    showNotch = lib.mkEnableOption "Show macOS Notch";
+    silentBoot = lib.mkEnableOption "Silent Boot";
+  };
+
+  config = mkIf cfg.enable {
+    services.xe-guest-utilities.enable = mkIf cfg.xenGuest true;
+
+    boot = {
+      kernelParams = lib.optionals cfg.silentBoot [
+        "quiet"
+        "loglevel=3"
+        "udev.log_level=3"
+        "rd.udev.log_level=3"
+        "systemd.show_status=auto"
+        "rd.systemd.show_status=auto"
+        "vt.global_cursor_default=0"
+      ] ++ lib.optionals cfg.showNotch [
+        "apple_dcp.show_notch=1"
+      ];
+
+      loader = {
+        efi = {
+          canTouchEfiVariables = false;
+        };
+
+        systemd-boot = {
+          enable = true;
+          configurationLimit = 20;
+          editor = false;
+        };
+
+        timeout = mkDefault 1;
+      };
+
+      initrd = mkIf cfg.xenGuest {
+        kernelModules = [ "xen_netfront" "xen_blkfront" ];
+        supportedFilesystems = [ "xenfs" ];
+      };
+      kernelModules = mkIf cfg.xenGuest [ "xen_netfront" "xen_blkfront" "xenfs" ];
+    };
+  };
+}