Imagemagick shell script

imagemagick.sh

#!/bin/bash

root=$PWD
#list=`find media/catalog/category/cache media/catalog/product/cache media/wysiwyg -type d`
list=`find media/catalog/output/folder1 media/catalog/output/folder3 -type d`
watermark="Kega Imagemagick"
green='\033[0;32m'
nocolor='\033[0m'
imagecount=1
count=0

spinner()
{
    local pid=$1
    local delay=0.1
    local spinstr='|/-\'
    echo "$pid" > "/tmp/.spinner.pid"
    while [ "$(ps a | awk '{print $1}' | grep $pid)" ]; do
        local temp=${spinstr#?}
        printf " [%c]  " "$spinstr"
        local spinstr=$temp${spinstr%"$temp"}
        sleep $delay
        printf "\b\b\b\b\b\b"
    done
    printf "    \b\b\b\b"
}

imagemagick()
{
    convert $file -filter Triangle \
    -define filter:support=2 \
    -unsharp 0.25x0.25+8+0.065 \
    -dither None \
    -posterize 136 \
    -quality 82 \
    -define jpeg:fancy-upsampling=off \
    -interlace none \
    -colorspace sRGB \
    -strip \
    -set comment "${watermark}" \
    -quiet $file
}

for directory in $list; do
    cd $root/$directory
    for file in *; do
        if [ ! -d "${file}" ]; then
            identity=`identify -format %c $file`
            origsize=`(wc -c <"$file")`

            if [ ! "$identity" == "$watermark" ] && [[ $file == *.jpg || $file == *.jpeg ]]; then
                count=1

                (imagemagick) &
                printf "${imagecount} Processing ${directory}/$file \n Original size: $origsize bytes "
                spinner $!
                printf "| New size:${newsize=$(wc -c <"$file")} bytes | Saved: $(($origsize-$newsize)) bytes | ${green}Done!${nocolor} \n"
                (( imagecount++ ))
            fi
        fi
    done
    cd $root
done

if [ $count == 0 ]; then
    echo "No new images to process"
fi