Add ability to inhibit sleep when plugged in

homes/x86_64-linux/alejandro@carbon/default.nix

@@ -4,7 +4,6 @@ let
   internal_display_settings = "eDP-1,preferred,auto,1.6";
   clamshell_script = pkgs.writeShellScriptBin "clamshell" ''
     if ${pkgs.hyprland}/bin/hyprctl monitors | ${pkgs.ripgrep}/bin/rg -q '\sDP-'; then
-        echo "Detected external monitor..."
         if [[ "$1" == "open" ]]; then
             ${pkgs.hyprland}/bin/hyprctl keyword monitor ${internal_display_settings}
         else
@@ -25,6 +24,7 @@ in
       ",preferred,auto,1"
     ];
   };
+  aa.services.hypridle.suspendInhibitWhenPluggedIn = true;
   aa.windowManagers.sway.enable = lib.mkForce false;
 
   wayland.windowManager.hyprland.settings.bindl = [

modules/home/services/hypridle/default.nix

@@ -14,6 +14,18 @@ let
     ;
 
   cfg = config.${namespace}.services.hypridle;
+
+  # Script that suspends only when on battery power.
+  # When plugged in, uses systemd-inhibit to block suspend.
+  suspendScript = pkgs.writeShellScript "hypridle-suspend" ''
+    if [ "$(${pkgs.coreutils}/bin/cat /sys/class/power_supply/AC/online)" = "1" ]; then
+      # Plugged in - inhibit suspend
+      ${pkgs.systemd}/bin/systemd-inhibit --what=sleep --who=hypridle --why="AC power connected" --mode=block ${pkgs.coreutils}/bin/sleep infinity &
+    else
+      # On battery - suspend
+      ${pkgs.systemd}/bin/systemctl suspend
+    fi
+  '';
 in
 {
   options.${namespace}.services.hypridle = {
@@ -49,6 +61,14 @@ in
         Whether or not to automatically suspend
       '';
     };
+    suspendInhibitWhenPluggedIn = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to inhibit suspend when AC power is connected.
+        Useful for laptops that should only suspend on battery.
+      '';
+    };
 
     brightnessTimeout = mkOption {
       type = types.int;
@@ -108,7 +128,11 @@ in
           # Suspend system
           (lib.mkIf cfg.suspendEnable {
             timeout = cfg.suspendTimeout;
-            on-timeout = "systemctl suspend";
+            on-timeout =
+              if cfg.suspendInhibitWhenPluggedIn then
+                "${suspendScript}"
+              else
+                "${pkgs.systemd}/bin/systemctl suspend";
           })
         ];
       };