refactor(hyprland): move terminal keybind into registry

configs/nixos/modules/desktop/apps/ghostty.nix

@@ -12,6 +12,14 @@ in
   options.modules.desktop.apps.ghostty.enable = lib.mkEnableOption "Ghostty as the desktop terminal";
 
   config = lib.mkIf config.modules.desktop.apps.ghostty.enable {
+    registry.keybind.${config.networking.hostName}.ghostty = {
+      keys = "SUPER + Return";
+      action = {
+        kind = "exec";
+        command = "${pkgs.ghostty}/bin/ghostty";
+      };
+    };
+
     home-manager.users.${user}.home.packages = [ pkgs.ghostty ];
   };
 }

configs/nixos/modules/desktop/session/hyprland/default.nix

@@ -8,6 +8,7 @@
   options.modules.desktop.session.hyprland.enable = lib.mkEnableOption "the Hyprland compositor";
 
   config = lib.mkIf config.modules.desktop.session.hyprland.enable {
+
     # This program integration owns the session, portals, and polkit, launched
     # through the universal Wayland session manager.
     programs.hyprland = {
@@ -34,14 +35,12 @@
       settings = {
         config.general.layout = "dwindle";
 
-        bind = [
+        bind = lib.mapAttrsToList (_name: keybind: {
-          {
+          _args = [
-            _args = [
+            keybind.keys
-              "SUPER + Return"
+            (lib.generators.mkLuaInline "hl.dsp.exec_cmd(${lib.generators.toLua { } keybind.action.command})")
-              (lib.generators.mkLuaInline ''hl.dsp.exec_cmd("ghostty")'')
+          ];
-            ];
+        }) (lib.attrByPath [ config.networking.hostName ] { } config.registry.keybind);
-          }
-        ];
       };
     };
   };

configs/nixos/registry/keybind.nix

@@ -0,0 +1,37 @@
+{ lib, util, ... }:
+{
+  checks = [
+    {
+      assertion = util.registry.predicates.uniquePerHost (entry: entry.value.keys);
+      message = "Desktop keybinds must use unique key chords per host.";
+    }
+  ];
+
+  type = lib.types.submodule {
+    options = {
+      keys = lib.mkOption {
+        description = "Sets the key chord for this desktop keybind.";
+        type = lib.types.str;
+        example = "SUPER + Return";
+      };
+
+      action = lib.mkOption {
+        description = "Declares the action this keybind runs.";
+        type = lib.types.submodule {
+          options = {
+            kind = lib.mkOption {
+              description = "Selects the keybind action kind.";
+              type = lib.types.enum [ "exec" ];
+            };
+
+            command = lib.mkOption {
+              description = "Command executed by this keybind.";
+              type = lib.types.str;
+              example = "ghostty";
+            };
+          };
+        };
+      };
+    };
+  };
+}

src/dotfiles/util.nix

@@ -16,14 +16,23 @@ let
           [ ]
       ) (builtins.readDir dir)
     );
+
+  uniqueValue =
+    value: entries: builtins.length (lib.unique (map value entries)) == builtins.length entries;
 in
 {
   inherit collectNixFiles;
 
   removeNixSuffix = path: lib.removeSuffix ".nix" (builtins.baseNameOf path);
 
-  registry.predicates.uniqueValue =
+  registry.predicates.uniqueValue = uniqueValue;
-    value: entries: builtins.length (lib.unique (map value entries)) == builtins.length entries;
+
+  registry.predicates.uniquePerHost =
+    value:
+    uniqueValue (entry: {
+      inherit (entry) host;
+      value = value entry;
+    });
 
   bridgeName = id: "br-vlan${toString id}";