add disko

hosts/canopus/default.nix

@@ -5,6 +5,8 @@
 }: {
   imports = [
     inputs.nixos-hardware.nixosModules.asus-zephyrus-ga503
+    inputs.disko.nixosModules.default
+    (./disko.nix {device = "/dev/nvme0n1";})
     ./hardware-configuration.nix
     ../common
     ../../modules/nixos/desktop

hosts/canopus/disko.nix

@@ -0,0 +1,48 @@
+{device ? throw "Set this to the disk device, e.g. /dev/nvme0n1", ...}: {
+  disko.devices.disk.primary = {
+    inherit device;
+    type = "disk";
+    content = {
+      type = "gpt"; # GPT partitioning scheme
+      partitions = {
+        # EFI Partition
+        ESP = {
+          size = "512M";
+          type = "EF00";
+          content = {
+            type = "filesystem";
+            format = "vfat";
+            mountpoint = "/boot";
+            mountOptions = ["defaults" "umask=0077"];
+          };
+        };
+        # Btrfs Root Partition
+        root = {
+          size = "100%"; # Use remaining space
+          type = "8300"; # Linux filesystem type
+          content = {
+            type = "btrfs";
+            subvolumes = {
+              "/root" = {
+                mountOptions = ["compress=zstd"]; # Compression for better performance
+                mountpoint = "/"; # Root subvolume
+              };
+              "/persistent" = {
+                mountOptions = ["compress=zstd"]; # Compression for persistent data
+                mountpoint = "/persistent"; # Persistent subvolume
+              };
+              "/nix" = {
+                mountOptions = [
+                  "compress=zstd"
+                  "noatime"
+                  "noacl"
+                ]; # Optimize for Nix store
+                mountpoint = "/nix"; # Nix subvolume
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/canopus/hardware-configuration.nix

@@ -8,26 +8,11 @@
     [ (modulesPath + "/installer/scan/not-detected.nix")
     ];
 
-  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usb_storage" "usbhid" "sd_mod" "sdhci_pci" ];
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usbhid" "usb_storage" "sd_mod" "sdhci_pci" ];
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-amd" ];
   boot.extraModulePackages = [ ];
 
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/b76b1267-0c4e-425b-aec5-968aece6e55d";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/2A0B-D264";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices =
-    [ { device = "/dev/disk/by-uuid/f3c7073e-2e51-490f-8668-09faeed74043"; }
-    ];
-
   # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
   # (the default) this is the recommended approach. When using systemd-networkd it's
   # still possible to use this option, but it's recommended to use it in conjunction