Set up the basics of imperanence

hosts/nixos/common/global/default.nix

@@ -6,7 +6,7 @@ let
     inputs.stylix.nixosModules.stylix
     inputs.slambda.nixosModule
     inputs.nur.nixosModules.nur
-    # inputs.impermanence.nixosModule
+    inputs.impermanence.nixosModule
 
     ./nix.nix
     ./openssh.nix
@@ -20,9 +20,9 @@ in
   # Import all modules defined in modules/nixos
   imports = builtins.attrValues outputs.nixosModules ++ imports;
 
-  age.identityPaths = [
-    "/etc/ssh/ssh_host_ed25519_key"
-  ];
+  # Allow non root users to specify the "allowOther" option.
+  # See [the imperanence readme](https://github.com/nix-community/impermanence#home-manager)
+  programs.fuse.userAllowOther = true;
 
   nixpkgs = {
     # Add all overlays defined in the overlays directory

hosts/nixos/common/global/openssh.nix

@@ -30,10 +30,13 @@ in
     gatewayPorts = "clientspecified";
 
     # Generate ssh key
-    hostKeys = [{
-      path = "/persist/etc/ssh/ssh_host_ed25519_key";
-      type = "ed25519";
-    }];
+    hostKeys =
+      let mkKey = type: path: extra: { inherit type path; } // extra;
+      in
+      [
+        (mkKey "ed25519" "/persist/etc/ssh/ssh_host_ed25519_key" { })
+        (mkKey "rsa" "/persist/etc/ssh/ssh_host_rsa_key" { bits = 4096; })
+      ];
   };
 
   # Passwordless sudo when SSH'ing with keys

hosts/nixos/common/global/wireless/default.nix

@@ -43,10 +43,9 @@
   # Ensure group exists
   users.groups.network = { };
 
+  # TODO: figure out why this does not work!
   # Persist imperative config
-  # environment.persistence = {
-  #   "/persist".files = [
-  #     "/etc/wpa_supplicant.conf"
-  #   ];
-  # };
+  # environment.persistence."/persist".files = [
+  #   "/etc/wpa_supplicant.conf"
+  # ];
 }

hosts/nixos/common/optional/touchpad.nix

@@ -7,7 +7,7 @@
       # How fast we should scroll I think
       accelSpeed = "3.5";
 
-      # #TODO: I forgor what this did
+      # TODO: I forgor what this did
       naturalScrolling = true;
 
       # Dsiable the touchpad while typing 

hosts/nixos/common/optional/xdg-portal.nix

@@ -0,0 +1,10 @@
+{ pkgs, lib, ... }: {
+  xdg.portal = {
+    enable = true;
+    xdgOpenUsePortal = true;
+    extraPortals = [ pkgs.xdg-desktop-portal ];
+  };
+
+  # HACK: copied from @lily on discord.
+  systemd.user.services.xdg-desktop-portal.path = lib.mkAfter [ "/run/current-system/sw" ];
+}

hosts/nixos/tethys/default.nix

@@ -9,6 +9,7 @@
     ../common/optional/lightdm.nix
     ../common/optional/steam.nix
     ../common/optional/slambda.nix
+    ../common/optional/xdg-portal.nix
     ../common/optional/xmonad
 
     ./hardware-configuration.nix