Script for JPEG images optimization

optimize-images.sh

#! /bin/sh

# Usage 1:
# optimize-images.sh /images/dir
# 
# Usage 2:
# cd /images/dir
# optimize-images.sh 

EXTENSIONS="jpe?g"

if [ -z "$1" ]; then
  DIR="`pwd`"
else
  DIR="$1"
fi

# Optimize JPEG images
find "$DIR" -regextype posix-egrep -regex ".*\.($EXTENSIONS)\$" -type f | xargs -I{} jpegtran -optimize -progressive -outfile "{}.optimized" "{}"

# Rename xxx.jpg.optimized -> xxx.jpg
find "$DIR" -name '*.optimized' -print0 | while read -d $'\0' file; do 
  chown $(stat -c "%U:%G" "${file%.optimized}") "$file"
  chmod $(stat -c "%a" "${file%.optimized}") "$file"
  mv -f "$file" "${file%.optimized}"; 
done