configure

#!/bin/sh

for arg in "$@"; do
    case "$arg" in
    --builddir=*)
        builddir=`echo $arg | sed 's/--builddir=//'`
        echo "$builddir" | grep " " &&
            echo "Whitespace is not allowed in build directory" &&
            exit 1
        ;;

    --prefix=*)
        prefix=`echo $arg | sed 's/--prefix=//'`
        ;;

    --config-dir=*)
        echo "Option --config-dir is deprecated, use --sysconfdir instead."
        sysconfdir=`echo $arg | sed 's/--config-dir=//'`
        ;;
    --sysconfdir=*)
        sysconfdir=`echo $arg | sed 's/--sysconfdir=//'`
        ;;

    --datadir=*)
        datadir=`echo $arg | sed 's/--datadir=//'`
        ;;

    --enable-debug)
        debugsym=true;;
    --disable-debug)
        debugsym=false;;

    --help)
        echo 'Usage: ./configure [options]'
        echo 'Options:'
        echo '  --builddir=<path>: Build output directory'
        echo '                     MUST be an absolute path and CANNOT contain'
        echo '                     whitespace'
        echo '  --prefix=<path>: Installation prefix'
        echo '  --config-dir=<path>: Deprecated, use --sysconfdir instead'
        echo '  --sysconfdir=<path>: System wide configure file location'
        echo '  --datadir=<path>: Application data location'
        echo '  --enable-debug: Include debug symbols'
        echo '  --disable-debug: Do not include debug symbols'
        echo 'All invalid options are silently ignored'
        exit 0
        ;;
    esac
done

if [ -z $builddir ]; then
   builddir=$PWD/build
fi

if [ -z $prefix ]; then
   prefix=/usr/local
fi

if [ -z $sysconfdir ]; then
   sysconfdir=$prefix/etc
fi

if [ -z $datadir ]; then
   datadir=$prefix/share
fi

if [ -z $debugsym ]; then
    debugsym=true
fi

echo 'Generating makefile ...'
echo '' > Makefile
echo "BUILDDIR = $builddir" | tee -a Makefile
echo "PREFIX = $prefix" | tee -a Makefile
echo "SYSCONFDIR = $sysconfdir" | tee -a Makefile
echo "DATADIR = $datadir" | tee -a Makefile
if $debugsym; then
    echo 'DBGFLAGS = -ggdb' | tee -a Makefile
fi
cat Makefile.in >> Makefile
echo 'Configuration complete, type make to build.'