Fix hyprland background

pkgs/wl-update-background/default.nix

@@ -1,29 +1,19 @@
-{ findutils
-, coreutils
-, writeShellScriptBin
+{ coreutils
+, findutils
 , hyprland
+, lib
+, writeShellScriptBin
 , backgrounds_directory ? "$HOME/Immagini/Sfondi/"
-}: writeShellScriptBin "wl-update-background"
+}: writeShellScriptBin "wl-update-background" ''
+  set -euo pipefail
+  PATH=$PATH:${lib.makeBinPath [findutils coreutils hyprland]}
+  WALLPAPER_DIR=${backgrounds_directory}
+  CURRENT_WALL=$(hyprctl hyprpaper listloaded)
+  CURRENT_WALL=$(basename "$CURRENT_WALL")
 
-  # ''
-  #   set -e
-  #   if [ $# -eq 0 ]; then
-  #     image=`${findutils}/bin/find ${backgrounds_directory} -type f | ${gnugrep}/bin/grep -v "/\." | ${coreutils}/bin/shuf -n 1`
-  #   else
-  #     image="$1"
-  #   fi
-  #   echo "image: $image"
-  #   ${swww}/bin/swww img "$image"
-  # ''
+  # Get a random wallpaper that is not the current one
+  NEW_WALLPAPER=$(find "$WALLPAPER_DIR" -type f ! -name "$CURRENT_WALL" | shuf -n 1)
 
-  ''
-    set -euo pipefail
-    WALLPAPER_DIR=${backgrounds_directory}
-    CURRENT_WALL=$(hyprctl hyprpaper listloaded)
-
-    # Get a random wallpaper that is not the current one
-    WALLPAPER=$(${findutils}/bin/find "$WALLPAPER_DIR" -type f ! -name "$(${coreutils}/bin/basename "$CURRENT_WALL")" | ${coreutils}/bin/shuf -n 1)
-
-    # Apply the selected wallpaper
-    ${hyprland}/bin/hyprctl hyprpaper reload ,"$WALLPAPER"
-  ''
+  # Apply the selected wallpaper
+  hyprctl hyprpaper reload ,"$NEW_WALLPAPER"
+''