#!/bin/sh
for arg in "$@"
do
    case $arg in
# Install bin to PREFIX/bin
# specify with --prefix "/whatever"
        --prefix)
        export PREFIX="$2"
        shift # Remove argument name from processing
        shift # Remove argument value from processing
        ;;
# Install viewer files to LIBDIR/tabletoplibrary
# specify with --libdir "/libwhatver"
        --libdir)
        export LIBDIR="$2"
        sed "s#LIB_DIR = [\']/lib[\']#LIB_DIR = \'$2\'#g" app.py | tee app.py
        shift
        shift
        ;;
    esac
done