dl_lastools.sh

# bash script that checks for new version of lastools
# the actual version is saved as LAStools_act.zip
# after downloading the latest version md5 of 
# both archives are checked against each other.


#download latest LAStools version
# -O for overwritting LAStools.zip
# -L for following any redirect
# go to home folder for script execution
cd /home/dmcl/
curl -O -L http://lastools.org/download/LAStools.zip 

# set temp filename and webserver path
file="LAStools_act.zip"
wwwpath="/var/www/html/intra/LAStools.zip"


{
# check first run
# if LAStools_act.zip does not exist
# download and copy it
if [ -f "$file" ];then
	echo "$file found."
	# check for new version with md5 sum
	if  [ $(md5sum LAStools.zip | awk '{print $1}') == $(md5sum LAStools_act.zip | awk '{print $1}') ]; then
		echo "no new version found"
		# remove LAStools.zip 
		rm LAStools.zip
	else
		echo "new version found"
		# remove the old version
		rm LAStools_act.zip
		# rename latest vesion
		mv LAStools.zip LAStools_act.zip
		# copy latest version to public webserver path
		cp LAStools_act.zip $wwwpath
	fi
else
	echo "$file not found. FIRST RUN."
	# rename latest vesion
	mv LAStools.zip LAStools_act.zip
	# copy latest version to public webserver path
	cp LAStools_act.zip $wwwpath
fi
}