1 files changed, 47 insertions, 0 deletions
diff --git a/sys/boot/chain.nix b/sys/boot/chain.nix
new file mode 100644
index 0000000..b6a9ab2
--- /dev/null
+++ b/sys/boot/chain.nix
@@ -0,0 +1,47 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.local.boot;
+in {
+  options.local.boot = {
+    loader = mkOption {
+      type = types.enum ["none" "out-of-band" "grub" "systemd-boot"];
+    };
+
+    kernel = mkOption {
+      type = types.raw;
+    };
+  };
+
+  config = mkIf (cfg.loader != "none") {
+    boot = {
+      kernelPackages = cfg.kernel;
+
+      loader =
+        if cfg.loader == "none" || cfg.loader == "out-of-band"
+        then {
+          grub.enable = false;
+        }
+        else if cfg.loader == "grub"
+        then {
+          grub = {
+            enable = true;
+            device = "nodev";
+            efiSupport = true;
+          };
+        }
+        else if cfg.loader == "systemd-boot"
+        then {
+          systemd-boot = {
+            enable = true;
+            editor = true;
+          };
+        }
+        else throw "unexpected config.local.boot.loader setting: ${cfg.loader}";
+    };
+  };
+}