nixos: impermanence -> perservation

flake.lock

@@ -159,21 +159,6 @@
         "type": "github"
       }
     },
-    "impermanence": {
-      "locked": {
-        "lastModified": 1724489415,
-        "narHash": "sha256-ey8vhwY/6XCKoh7fyTn3aIQs7WeYSYtLbYEG87VCzX4=",
-        "owner": "nix-community",
-        "repo": "impermanence",
-        "rev": "c7f5b394397398c023000cf843986ee2571a1fd7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "impermanence",
-        "type": "github"
-      }
-    },
     "lanzaboote": {
       "inputs": {
         "crane": [
@@ -298,6 +283,21 @@
         "type": "github"
       }
     },
+    "preservation": {
+      "locked": {
+        "lastModified": 1725460242,
+        "narHash": "sha256-9n9Ygta1MCfpbF9D88tG2B4EL5nuSz4eIOAofGSlxoE=",
+        "owner": "WilliButz",
+        "repo": "preservation",
+        "rev": "02e731a820d05107bc648460f8630d0d80a5ffd4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "WilliButz",
+        "repo": "preservation",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "colmena": "colmena",
@@ -308,12 +308,12 @@
         "flake-utils": "flake-utils",
         "gitignore": "gitignore",
         "home-manager": "home-manager",
-        "impermanence": "impermanence",
         "lanzaboote": "lanzaboote",
         "neovim": "neovim",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",
         "pre-commit-hooks-nix": "pre-commit-hooks-nix",
+        "preservation": "preservation",
         "rust-overlay": "rust-overlay",
         "sops-nix": "sops-nix",
         "systems": "systems",

flake.nix

@@ -28,9 +28,6 @@
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    impermanence = {
-      url = "github:nix-community/impermanence";
-    };
     lanzaboote = {
       url = "github:nix-community/lanzaboote";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -50,6 +47,9 @@
     nixos-hardware = {
       url = "github:NixOS/nixos-hardware";
     };
+    preservation = {
+      url = "github:WilliButz/preservation";
+    };
     sops-nix = {
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";

hosts/dust/default.nix

@@ -6,16 +6,23 @@
   ...
 }:
 {
-  imports = [
+  imports =
+    [
       ../../nixos/profiles/sing-box
       ../../nixos/profiles/wireless
 
       ./anti-feature.nix
       ./disko.nix
       ./hardware-configuration.nix
-    ./impermanence.nix
       ./lanzaboote.nix
-  ];
+      ./preservation.nix
+    ]
+    ++ (with inputs; [
+      disko.nixosModules.disko
+      home-manager.nixosModules.home-manager
+      lanzaboote.nixosModules.lanzaboote
+      preservation.nixosModules.preservation
+    ]);
 
   networking.hostName = "dust";
   time.timeZone = "Asia/Shanghai";

hosts/dust/preservation.nix

@@ -2,8 +2,8 @@
 {
   sops.age.sshKeyPaths = lib.mkForce [ "/persist/etc/ssh/ssh_host_ed25519_key" ];
   fileSystems."/persist".neededForBoot = true;
-  environment.persistence."/persist" = {
-    hideMounts = true;
+  preservation.enable = true;
+  preservation.preserveAt."/persist" = {
     directories = [
       "/var/log"
       "/var/lib"
@@ -15,6 +15,7 @@
       "/etc/ssh/ssh_host_rsa_key"
       "/etc/ssh/ssh_host_rsa_key.pub"
     ];
+
     users.guanranwang = {
       directories = [
         "Desktop"
@@ -43,4 +44,19 @@
       ];
     };
   };
+
+  systemd.tmpfiles.settings.preservation =
+    let
+      mkTmpfile = {
+        user = "guanranwang";
+        group = "users";
+        mode = "0755";
+      };
+    in
+    {
+      "/home/guanranwang/.config".d = mkTmpfile;
+      "/home/guanranwang/.mozilla".d = mkTmpfile;
+      "/home/guanranwang/.local/share".d = mkTmpfile;
+      "/home/guanranwang/.local/state".d = mkTmpfile;
+    };
 }

nixos/profiles/core/default.nix

@@ -12,10 +12,6 @@
       ./zram.nix
     ]
     ++ (with inputs; [
-      disko.nixosModules.disko
-      home-manager.nixosModules.home-manager
-      impermanence.nixosModules.impermanence
-      lanzaboote.nixosModules.lanzaboote
       self.nixosModules.default
       sops-nix.nixosModules.sops
     ]);