compress image by pngquant

compress_image.sh

#! /bin/Bash

pngfile=".png"
jpgfile=".jpg"
ignorefile='__ic' #ignore compress
rootpath='src/assets'

read_dir(){
    for file in `ls -a $1`
    do
        if [ -d $1"/"$file ]
        then
            if [[ $file != '.' && $file != '..' ]]
            then
                read_dir $1"/"$file
            fi
        else
            if [[ $file == *$pngfile ]] || [[ $file == *$jpgfile ]]
            then 
                if [[ $file =~ $ignorefile ]]
                then
                    echo "忽略:"$1"/"$file
                else
                    # process
                    echo "压缩:"$1"/"$file
                    ./pngquant --quality=75 --skip-if-larger --ext=.png --force $1"/"$file
                fi
            else
                echo "忽略:"$1"/"$file
            fi
        fi
    done
}

echo "Begin"
befor_size=$(du -hs $rootpath | cut -f1)
read_dir $rootpath
echo "Done"
after_size=$(du -hs $rootpath | cut -f1)
echo $befor_size "->" $after_size