[galaxy-dev] GALAXY_LIB path in job scripts

The job scripts generated by galaxy contain following code. I was wondering what's the purpose of if-block after setting 'GALAXY_LIB="None"' assignment. {{{ GALAXY_LIB="None" if [ "$GALAXY_LIB" != "None" ]; then if [ -n "$PYTHONPATH" ]; then PYTHONPATH="$GALAXY_LIB:$PYTHONPATH" else PYTHONPATH="$GALAXY_LIB" fi export PYTHONPATH fi }}} -- Shantanu