fix fish export script

scripts/export.fish

@@ -24,7 +24,7 @@ else
     if [ "$hash1" != "$hash2" ]
         set rpass "$(logprinti "root password" "p")"
         if [ "$rpass" = "" ]
-            logprintn "WARN" "yellow" "empty root password"
+            logprintn "EXIT" "red" "empty root password"
             exit 0
         end
         echo "$rpass" | sudo -S cp -r "nixos/" "/etc/"
@@ -34,7 +34,8 @@ else
         end
         set rebuild "$(string lower $rebuild)"
         if [ "$rebuild" = "y" ]
-            echo "$rpass" | sudo -S nixos-rebuild switch
+            sudo fish -c "sudo nixos-rebuild switch"
+            logprintn "INFO" "blue" "nixos-rebuild completed"
         end
     end
     set gitpush "$(logprinti "update git (Y/n)" "c")"