GWB_check4updates

#!/bin/bash
# GWB_check4updates
#
#############################################################
# Purpose: 
#   run this script to test for availability of a newer 
#   version of GWB, the GuidosToolbox-Workbench
#   (subset of GuidosToolbox)
#
# more info at:
#  - https://forest.jrc.ec.europa.eu/en/activities/lpa/gwb/
############################################################## 
topdir=$(dirname "$0")
if test "$topdir" = "." ; then
   topdir=$PWD;
fi
if test "$topdir" = "/usr/bin" ; then
   topdir="/opt/GWB"
fi
cd "$topdir" || exit

# installed version
v_installed=$(cat tools/GWB_version.txt)
# current version
v_curr=$(curl -s https://ies-ows.jrc.ec.europa.eu/gtb/GWB/GWB_version.txt)
v1=${v_curr:0:1}
re='^[0-9]+$'

echo "GWB version checker"
echo "Installed version: ""$v_installed"
if ! [[ $v1 =~ $re ]] ; then
  v_curr='Problem accessing the GWB website/internet.'
  echo "  Current version: ""$v_curr"
  exit 48
fi
echo "  Current version: ""$v_curr"
echo ""

if [ "$v_installed" != "$v_curr" ]; then
  echo "**********  Your version is out of date **********"
  echo "Support will be provided for the most recent version only."
  echo "Please upgrade your installed version to the current one at:" 
  echo "https://forest.jrc.ec.europa.eu/en/activities/lpa/gwb/"
  exit 49
else
  echo "Your version is uptodate."
  exit 50
fi

exit