refactoring for iServer and isWorkstation: part 2

hosts/modules/impermanence.nix

@@ -0,0 +1,37 @@
+{ hostType, lib, ... }:
+
+{
+  config = lib.mkMerge [
+    # Common configuration
+    {
+    }
+
+    # Server specific configuration
+    (lib.mkIf hostType.isServer {
+    })
+
+    # Workstation specific configuration
+    (lib.mkIf hostType.isWorkstation {
+      environment.persistence.main = {
+        persistentStoragePath = "/persistent";
+        files = [
+          "/etc/machine-id"
+          "/etc/ssh/ssh_host_ed25519_key"
+          "/etc/ssh/ssh_host_ed25519_key.pub"
+          "/etc/ssh/ssh_host_rsa_key"
+          "/etc/ssh/ssh_host_rsa_key.pub"
+        ];
+        directories = [
+          "/etc/NetworkManager/system-connections"
+          "/var/lib/bluetooth"
+          "/var/lib/flatpak"
+          "/var/lib/nixos"
+          "/var/lib/systemd/coredump"
+          "/var/lib/systemd/timers"
+          "/var/lib/tailscale"
+          "/var/log"
+        ];
+      };
+    })
+  ];
+}