pngquantWrapper

#!/bin/bash
if [ -z "$1" ]; then
        echo usage: compressimg [file]
        echo This tool will apply common image optimization techniques to the given file.
        exit
fi
OLDSIZE=`ls -l $1 | awk '{ print $5}'`

./pngquant --force --skip-if-larger $1 --output $1.tmp

if [ -f $1.tmp ]; then 
mv $1.tmp $1
fi 

NEWSIZE=`ls -l $1 | awk '{ print $5}'`

# show final stats
let RESULT=100-$NEWSIZE*100/$OLDSIZE
echo $1 $NEWSIZE'/'$OLDSIZE ' - ['$RESULT'% COMPRESSED]'