refactor(rofi): use executable helpers

configs/nixos/modules/desktop/session/rofi.nix

@@ -6,19 +6,17 @@
 }:
 # rofi as the desktop launcher and dmenu-style menu frontend.
 let
-  user = config.user.name;
-
   # A session menu built on the same themed rofi, so the power actions look
   # like every other menu the launcher drives.
   powerMenu = pkgs.writeShellScript "rofi-power-menu" ''
     chosen=$(printf '%s\n' Lock Suspend 'Log out' Reboot 'Shut down' \
-      | ${pkgs.rofi}/bin/rofi -dmenu -i -p Power)
+      | ${lib.getExe pkgs.rofi} -dmenu -i -p Power)
     case "$chosen" in
-      Lock) ${pkgs.systemd}/bin/loginctl lock-session ;;
-      Suspend) ${pkgs.systemd}/bin/systemctl suspend ;;
-      'Log out') ${pkgs.systemd}/bin/loginctl terminate-session "$XDG_SESSION_ID" ;;
-      Reboot) ${pkgs.systemd}/bin/systemctl reboot ;;
-      'Shut down') ${pkgs.systemd}/bin/systemctl poweroff ;;
+      Lock) ${lib.getExe' pkgs.systemd "loginctl"} lock-session ;;
+      Suspend) ${lib.getExe' pkgs.systemd "systemctl"} suspend ;;
+      'Log out') ${lib.getExe' pkgs.systemd "loginctl"} terminate-session "$XDG_SESSION_ID" ;;
+      Reboot) ${lib.getExe' pkgs.systemd "systemctl"} reboot ;;
+      'Shut down') ${lib.getExe' pkgs.systemd "systemctl"} poweroff ;;
     esac
   '';
 in
@@ -26,25 +24,7 @@ in
   options.modules.desktop.session.rofi.enable = lib.mkEnableOption "the rofi launcher";
 
   config = lib.mkIf config.modules.desktop.session.rofi.enable {
-    registry.keybind.${config.networking.hostName} = {
-      rofi-launcher = {
-        keys = "SUPER + R";
-        action = {
-          kind = "exec";
-          command = "${pkgs.rofi}/bin/rofi -show drun";
-        };
-      };
-
-      rofi-power-menu = {
-        keys = "SUPER + SHIFT + X";
-        action = {
-          kind = "exec";
-          command = "${powerMenu}";
-        };
-      };
-    };
-
-    home-manager.users.${user} = {
+    home-manager.users.${config.user.name} = {
       # No theme is set here: Stylix's rofi target supplies the Nord one.
       programs.rofi = {
         enable = true;
@@ -57,7 +37,24 @@ in
           show-icons = false;
         };
       };
+    };
 
+    registry.keybind.${config.networking.hostName} = {
+      rofi-launcher = {
+        keys = "SUPER + R";
+        action = {
+          kind = "exec";
+          command = "${lib.getExe pkgs.rofi} -show drun";
+        };
+      };
+
+      rofi-power-menu = {
+        keys = "SUPER + SHIFT + X";
+        action = {
+          kind = "exec";
+          command = "${powerMenu}";
+        };
+      };
     };
   };
 }