1 files changed, 52 insertions, 0 deletions
diff --git a/sys/impermanence/default.nix b/sys/impermanence/default.nix
new file mode 100644
index 00000000..a9be951a
--- /dev/null
+++ b/sys/impermanence/default.nix
@@ -0,0 +1,52 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.soispha.impermanence;
+  networkmanager =
+    if config.networking.networkmanager.enable
+    then [
+      "/etc/NetworkManager" # store the networkmanager configs
+    ]
+    else [];
+  secureboot =
+    if config.boot.lanzaboote.enable
+    then [
+      "/etc/secureboot"
+    ]
+    else [];
+  directories =
+    [
+      "/etc/nixos"
+      "/var/log"
+      # TODO: the following entries need to be checked
+      #"/var/lib/bluetooth"
+      #"/var/lib/nixos"
+      #"/var/lib/systemd/coredump"
+    ]
+    ++ networkmanager
+    ++ secureboot;
+in {
+  options.soispha.impermanence = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = lib.mdDoc "Disk setup with disko";
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    # needed for the hm impermanence config
+    programs.fuse.userAllowOther = true;
+
+    environment.persistence = {
+      "/srv" = {
+        hideMounts = true;
+        inherit directories;
+        files = [
+          "/etc/machine-id"
+        ];
+      };
+    };
+  };
+}