feat(ymir): add simple disko config.

flake.nix

@@ -270,6 +270,8 @@
           # Still no specific modules here
           # ./modules/cross-platform/nixos
           agenix.nixosModules.default
+          # Use disko for creating filesystem
+          disko.nixosModules.disko
           # Setup home manager for my user
           home-manager.nixosModules.home-manager
           {

hosts/ymir/configuration.nix

@@ -7,6 +7,7 @@
   imports = [
     # Include the results of the hardware scan.
     ./hardware-configuration.nix
+    ./disk-config.nix
     inputs.home-manager.nixosModules.home-manager
   ];
 

hosts/ymir/disk-config.nix

@@ -0,0 +1,64 @@
+{
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = ["umask=0077"];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "crypt";
+                passwordFile = "/tmp/secret.key"; # Interactive
+                settings = {
+                  allowDiscards = true;
+                  keyFile = "/tmp/secret.key";
+                };
+                content = {
+                  type = "btrfs";
+                  extraArgs = ["-f"];
+                  subvolumes = {
+                    "@" = {
+                      mountpoint = "/";
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
+                    };
+                    "@home" = {
+                      mountpoint = "/home";
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
+                    };
+                    "@nix" = {
+                      mountpoint = "/nix";
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}