impermanence for real

hosts/desktops/common/default.nix

@@ -4,6 +4,7 @@
   imports = [
     ./boot.nix
     ./hardware.nix
+    ./impermanence.nix
     ./nix.nix
     ./packages.nix
     ./services.nix

hosts/desktops/common/impermanence.nix

@@ -0,0 +1,41 @@
+{ config, lib, pkgs, ... }:
+
+{
+  environment.persistent.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 = [
+      "/var/log"
+      "/var/lib/bluetooth"
+      "/var/lib/docker"
+      "/var/lib/nixos"
+      "/var/lib/flatpak"
+      "/var/lib/systemd/coredump"
+      "/etc/NetworkManager/system-connections"
+    ];
+    users.user = {
+      directories = [
+        "Documents"
+        "Games"
+        "Music"
+        "Pictures"
+        "Projects"
+        "Videos"
+        "VMs"
+        ".mozilla"
+        ".local/share/containers"
+        ".local/share/direnv"
+        ".local/share/flatpak"
+        ".local/share/Steam"
+        ".cache/nix"
+        ".cache/flatpak"
+      ];
+    };
+  };
+}