gistfile1.txt

while [[ true ]]; do
	echo "pull latest images"
	git clone <git path> --branch <branch name> --single-branch

	# step1, run imageOtim
	./imageoptim -s -d ./<res path>

	# step2, convert webp
    # webp is not supported until 4.3 (api 18)

#    echo "locate all image files"
#    find .  -path "./<res path>/*" -type f \( -iname "*.png" -o -iname "*.PNG" -o -iname "*.jpg" -o -iname "*.JPG" \) -print0 | while IFS= read -r -d $'\0' file;
#	do
#		base="${file:0:${#file}-4}"
#		webpfile="${file:0:${#file}-4}.webp"
#
#		if ! [[ $file == *".9"* ]] && [[ $file == *".png"* ]]
#		then
#			echo 
#			cwebp -q 70 "$file" -o "$webpfile" -m 6 -quiet
#
#			I=$(stat -f "%z" $webpfile)
#			J=$(stat -f "%z" $file)
#
#			echo "convert $file to webp (webp size:" $I "   original size:" $J ")"
#
#			# delete the WebP file if it is equal size or larger than the original PNG
#			if [ $I -gt $J ]
#			then
#				echo "delete WebP file that is no smaller than PNG"
#				rm -f "$base".webp
#			else
#				echo "replace png with smaller webp"
#				rm -f "$file"
#			fi
#		fi
#	done
#

	echo "push image changes..."
    git add -A 
    git commit -am "weekly image triming"
    git push origin <branch name>
    cd ..

	echo "job done, see you next week"
	sleep 604800

done