refactor, ssh changes

flake.nix

@@ -59,7 +59,6 @@
           imports = [
             ./host/roam
             mod.shared.all
-            mod.server.all
           ];
         };
       };

host/roam/default.nix

@@ -1,12 +1,8 @@
-{ ... }:
+{ lib', ... }:
 {
   networking.hostName = "roam";
 
-  imports = [
-    ./hardware-configuration.nix
-  ];
-
-  services.openssh.enable = true;
+  imports = lib'.import-recursive ./.;
 
   # ====== DON'T CHANGE ======
   system.stateVersion = "24.11";

host/roam/services/services.nix

@@ -31,5 +31,10 @@ in
         };
       };
     };
+
+    openssh = {
+      enable = true;
+      settings.PasswordAuthentication = false;
+    };
   };
 }

lib.nix

@@ -1,5 +1,6 @@
 { lib, ... }:
 rec {
+  # TODO make a version that only includes nix paths.
   walk-dir =
     path:
     let
@@ -15,4 +16,8 @@ rec {
         else
           builtins.throw "Items of type ${value} are unsupported.";
     }) dir;
+
+  # Takes a path `p` and returns a flattened lists of all files in that
+  # directory, ignoring `p/default.nix`.
+  import-recursive = path: lib.attrsets.collect builtins.isPath (walk-dir path // { default = { }; });
 }

mod/server/all.nix

@@ -1,8 +0,0 @@
-{ mod, ... }:
-{
-  imports = with mod.server; [
-    services
-    networking
-    security
-  ];
-}