Add shared monitor configuration across window managers

- Define monitors option in hardware.nix with explicit dimensions
- Pass monitors to home-manager via extraSpecialArgs
- Update hyprland and sway to consume shared monitor config
- Removes hardcoded monitor definitions from WM modules

src/system/machines/desktop/hardware.nix

@@ -1,8 +1,31 @@
 { config, lib, pkgs, modulesPath, ... }:
 
+with lib;
 {
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
+  options.monitors = mkOption {
+    type = types.listOf (types.submodule {
+      options = {
+        name = mkOption { type = types.str; example = "HDMI-A-1"; };
+        width = mkOption { type = types.int; };
+        height = mkOption { type = types.int; };
+        x = mkOption { type = types.int; };
+        y = mkOption { type = types.int; };
+        scale = mkOption { type = types.float; };
+        refreshRate = mkOption { type = types.int; };
+      };
+    });
+    default = [];
+    description = "System monitor configuration";
+  };
+
+  config = {
+    monitors = [
+      { name = "HDMI-A-1"; width = 1920; height = 1080; x = 0;    y = 0; scale = 1.0; refreshRate = 60; }
+      { name = "DP-1";     width = 1920; height = 1080; x = 1920; y = 0; scale = 1.0; refreshRate = 60; }
+    ];
+
     boot = {
       initrd = {
         availableKernelModules = [ "vmd" "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
@@ -73,4 +96,5 @@
 
     nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
     powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
+  };
 }

src/system/machines/desktop/modules/home-manager/home.nix

@@ -3,6 +3,9 @@
 {
   home-manager.useGlobalPkgs = true;
   home-manager.useUserPackages = true;
+  home-manager.extraSpecialArgs = {
+    monitors = config.monitors;
+  };
   home-manager.users.${config.user.name} = {
     imports = [ ../../../../../user ];
 

src/user/modules/gui/wm/hyprland/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, config, ... }:
+{ pkgs, lib, config, monitors ? [], ... }:
 
 with lib;
 let
@@ -9,6 +9,9 @@ let
     sha256 = "1ph5m9s57076jx6042iipqx2ifzadmd5z4lf5l49wgq4jb92mp16";
   };
 
+  toHyprlandMonitor = m:
+    "${m.name}, ${toString m.width}x${toString m.height}@${toString m.refreshRate}, ${toString m.x}x${toString m.y}, ${toString m.scale}";
+
 in
 { options.modules.user.gui.wm.hyprland = { enable = mkEnableOption "Enable Hyprland WM"; };
   config = mkIf cfg.enable {
@@ -21,10 +24,9 @@ in
         "$terminal" = "${pkgs.alacritty}/bin/alacritty";
         "$menu" = "rofi -show drun -show-icons -drun-icon-theme Qogir -font 'Noto Sans 14'";
 
-        monitor = [
+        monitor = if monitors != []
-          "HDMI-A-1, 1920x1080, 0x0, 1"
+          then map toHyprlandMonitor monitors
-          "DP-1, 1920x1080, 1920x0, 1"
+          else [ ", preferred, auto, 1" ];
-        ];
 
         exec-once = [
           "waybar"

src/user/modules/gui/wm/sway/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, config, ... }:
+{ pkgs, lib, config, monitors ? [], ... }:
 
 with lib;
 let
@@ -17,6 +17,21 @@ let
     done
   '';
 
+  toSwayOutput = m: {
+    "${m.name}" = {
+      resolution = "${toString m.width}x${toString m.height}@${toString m.refreshRate}Hz";
+      position = "${toString m.x} ${toString m.y}";
+      scale = toString m.scale;
+      bg = "${wallpaper} fill";
+    };
+  };
+
+  outputConfig = if monitors != []
+    then lib.mkMerge (map toSwayOutput monitors)
+    else {
+      "*" = { bg = "${wallpaper} fill"; };
+    };
+
 in
 { options.modules.user.gui.wm.sway = { enable = mkEnableOption "Enable Sway WM"; };
   config = mkIf cfg.enable {
@@ -37,13 +52,7 @@ in
           names = [ "Terminus" ];
         };
 
-        output = {
+        output = outputConfig;
-          DP-2 = {
-            resolution = "3440x1440@59.973Hz";
-            position = "0,0";
-            bg = "${wallpaper} fill";
-          };
-        };
         modifier = "Mod1";
         menu = "rofi -show drun -show-icons -drun-icon-theme Qogir -font 'Noto Sans 14'";
         terminal = "${pkgs.alacritty}/bin/alacritty";