Add initial rofi lib

lib/default.nix

@@ -8,4 +8,5 @@
   modules = import ./modules.nix {inherit inputs pkgs lib;};
   networking = import ./networking.nix {inherit inputs pkgs lib;};
   virtualisation = import ./virtualisation.nix {inherit inputs pkgs lib;};
+  rofi = import ./rofi.nix {inherit inputs pkgs lib;};
 }

lib/rofi.nix

@@ -0,0 +1,21 @@
+{
+  inputs,
+  pkgs,
+  lib,
+  ...
+}: rec {
+  # Receives attrs like:
+  # {
+  #   "Poweroff" = "poweroff";
+  #   "Reload Hyprland" = "hyprctl reload";
+  # }
+  mkSimpleMenu = let
+    # Makes a string like ''"Poweroff" "Reload Hyprland"''
+    unpack-options = attrs: "\"${lib.concatStringsSep "\" \"" builtins.attrNames attrs}\"";
+  in
+    prompt: attrs: ''
+      #! ${pkgs.fish}/bin/fish
+
+      set OPTIONS ${unpack-options attrs}
+    '';
+}