better machine conf, rework key/machines management

flake.nix

@@ -38,8 +38,8 @@
     stylix,
     ...
   }: let
-    laptop = import ./machines/laptop/machine.nix;
-    _173-249-5-230 = import ./machines/173-249-5-230/machine.nix;
+    machines = import ./machines.nix;
+    _173-249-5-230 = machines._173-249-5-230;
     configuration = machine: modules:
       nixpkgs.lib.nixosSystem {
         system = machine.system;
@@ -47,8 +47,7 @@
         modules =
           modules
           ++ [
-            machine.configuration
-            machine.hardware-configuration
+            ./machines/${machine.hostname}/configuration.nix
           ];
       };
     configurationWithHomeManager = machine: (configuration machine
@@ -67,7 +66,7 @@
             (name: value: value)
             (
               nixpkgs.legacyPackages.${machine.system}.lib.genAttrs
-              machine.usernames
+              machine.users
               (
                 name: {
                   imports = [
@@ -84,7 +83,9 @@
         noshell.nixosModules.default
       ]);
   in {
-    nixosConfigurations.${laptop.hostname} = configurationWithHomeManager laptop;
-    nixosConfigurations.${_173-249-5-230.hostname} = configurationWithHomeManager _173-249-5-230;
+    nixosConfigurations =
+      builtins.mapAttrs
+      (hostname: value: configurationWithHomeManager value)
+      machines;
   };
 }