upate michishirube to grub bootloader

hosts/common/disks/digital-ocean-disks.nix

@@ -1,6 +0,0 @@
-{
-  fileSystems."/" = {
-    device = "/dev/disk/by-label/nixos";
-    fsType = "ext4";
-  };
-}

hosts/common/disks/hetzner-disks.nix

@@ -1,11 +0,0 @@
-{
-  fileSystems."/" = {
-    device = "/dev/sda";
-    fsType = "ext4";
-  };
-
-  fileSystems."/efi" = {
-    device = "systemd-1";
-    fsType = "autofs";
-  };
-}

hosts/common/disks/test-disk.nix

@@ -0,0 +1,43 @@
+# NOTE: ... is needed because dikso passes diskoFile
+{
+  lib,
+  disk ? "/dev/vda",
+  withSwap ? false,
+  swapSize,
+  ...
+}: {
+  disko.devices = {
+    disk = {
+      disk0 = {
+        type = "disk";
+        device = disk;
+        content = {
+          type = "gpt";
+          partitions = {
+            boot = {
+              priority = 1;
+              name = "ESP";
+              start = "1M";
+              end = "512M";
+              type = "EF02";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = ["defaults"];
+              };
+            };
+            root = {
+              size = "100%";
+              content = {
+                type = "filesystem";
+                format = "ext4";
+                mountpoint = "/";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/nixos/Michishirube/default.nix

@@ -14,7 +14,7 @@ in {
   imports = lib.flatten [
     # Disks
     inputs.disko.nixosModules.disko
-    (lib.custom.relativeToRoot "hosts/common/disks/btrfs-disk.nix")
+    (lib.custom.relativeToRoot "hosts/common/disks/test-disk.nix")
     {
       _module.args = {
         disk = "/dev/sda";
@@ -49,9 +49,6 @@ in {
   };
 
   boot.loader = {
-    systemd-boot.enable = true;
-    efi = {
-      canTouchEfiVariables = true;
-    };
+    grub.device = "/dev/sda";
   };
 }

hosts/nixos/Michishirube/hardware-configuration.nix

@@ -4,6 +4,7 @@
 {modulesPath, ...}: {
   imports = [
     (modulesPath + "/installer/scan/not-detected.nix")
+    (modulesPath + "/profiles/qemu-guest.nix")
   ];
 
   boot.initrd.availableKernelModules = ["xhci_pci" "ahci" "usb_storage" "sd_mod" "virtio_pci" "virtio_scsi"];