Delete unused image files

unused_img.sh

#!/bin/bash

if [ $# -eq 0 ]
  then
    echo "Please supply paths to search under"
    exit 1
fi
IMG_PATH=$1
HTML_AND_CSS_PATH=$2

find "$IMG_PATH" -name *.jpg > /tmp/patterns
find "$IMG_PATH" -name *.png >> /tmp/patterns
find "$IMG_PATH" -name *.gif >> /tmp/patterns
find "$IMG_PATH" -name *.svg >> /tmp/patterns

for p in $(cat /tmp/patterns); do
    f=$(basename $p);
    grep -R $f "$HTML_AND_CSS_PATH" > /dev/null || echo $p;
done