Refactor modules

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/eirene/format.nix

@@ -0,0 +1,78 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.format;
+in
+{
+  options.format = {
+    device = lib.mkOption {
+      type = lib.types.str;
+      description = "The device to format";
+    };
+  };
+
+  config = {
+    disko.devices = {
+      disk.main = {
+        type = "disk";
+        device = cfg.device;
+        content = {
+          type = "gpt";
+          partitions = {
+            boot = {
+              name = "boot";
+              size = "1M";
+              type = "EF02";
+            };
+            esp = {
+              name = "esp";
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+              };
+            };
+            swap = {
+              name = "swap";
+              size = "32G";
+              content = {
+                type = "swap";
+                resumeDevice = true;
+              };
+            };
+            root = {
+              name = "root";
+              size = "100%";
+              content = {
+                name = "luks";
+                type = "luks";
+                settings = {
+                  allowDiscards = true;
+                };
+                content = {
+                  type = "btrfs";
+                  extraArgs = ["-f"];
+                  subvolumes = {
+                    "/root" = {
+                      mountpoint = "/";
+                    };
+                    "/persist" = {
+                      mountpoint = "/persist";
+                      mountOptions = ["subvol=persist" "compress=zstd" "noatime"];
+                    };
+                    "/nix" = {
+                      mountpoint = "/nix";
+                      mountOptions = ["subvol=nix" "compress=zstd" "noatime"];
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}