macOS rename photos in folder for with photo shooting date

photo.sh

#!/bin/bash


for filename in $(pwd)/*; do
  line=$(mdls $filename | grep kMDItemFSCreationDate)

  fileExtension=$(echo $filename | cut -f2 -d".")

  datetime=$(echo $line | cut -f2 -d "=")
  date=$(echo $datetime | cut -f1 -d " ")
  time=$(echo $datetime | cut -f2 -d " ")
  time=$(echo $time| sed -r 's/[:]+//g')

  mv $filename $date-$time.$fileExtension
done