Add check for ArcMenu extension before archiving and cleanup

Author: Anduin2017

src/upgrade.sh

@@ -449,13 +449,17 @@ EOF
       judge "Update ArcMenu extension"
 
       #mv /root/.local/share/gnome-shell/extensions/* /usr/share/gnome-shell/extensions/
-      print_ok "Archiving GNOME extensions to system level"
-      sudo rsync -Aavx --update --delete /root/.local/share/gnome-shell/extensions/arcmenu@arcmenu.com/ /usr/share/gnome-shell/extensions/arcmenu@arcmenu.com/
-      judge "Archive GNOME extensions"
-
-      print_ok "Cleaning up root's GNOME extensions"
-      sudo rm -rf /root/.local/share/gnome-shell/extensions/* || true
-      judge "Clean up root's GNOME extensions"
+      if [ -d '/root/.local/share/gnome-shell/extensions/arcmenu@arcmenu.com' ]; then
+        print_ok "Archiving GNOME extensions to system level"
+        sudo rsync -Aavx --update --delete /root/.local/share/gnome-shell/extensions/arcmenu@arcmenu.com/ /usr/share/gnome-shell/extensions/arcmenu@arcmenu.com/
+        judge "Archive GNOME extensions"
+
+        print_ok "Cleaning up root's GNOME extensions"
+        sudo rm -rf /root/.local/share/gnome-shell/extensions/* || true
+        judge "Clean up root's GNOME extensions"
+      else
+        print_warn "ArcMenu extension not found in root's GNOME extensions, might be already up to date. Skipping archiving."
+      fi
 
       # 1.1 uses Gnome Shell 46 which doesn't support Super_R as hotkey for both ArcMenu and system.
       # print_ok "Adding hotkey Super_L and Super_R for ArcMenu"