set -e

SRCDIR=`pwd`

AgreeEULA="$1"
InstallDir="$2"

if [ ! -f "$SRCDIR/eula.txt" ]; then
    1>&2 cat <<EOF

Could not find the End-User License Agreement.  You must read the license
before installing this software product.

EOF
    exit 1
fi

if [ "$AgreeEULA" != "agree" ]; then

    echo "Please read and agree to the License Agreement before installing Swift."
    more "$SRCDIR/eula.txt"

    echo ""
    printf "Do you agree to these terms?  Enter -yes- to continue: "
    read answer
    echo ""
    if [ "x$answer" != "xyes" ]; then
        echo "Cancelling installation at your request."
        exit 0
    fi

fi

# Get the installation directory
while :; do
    if [ ! "$InstallDir" ]; then
        printf "Install into what directory? [/opt/swift] "
        read prefix
    else
        prefix=$InstallDir
    fi
    if [ `uname -s` = "Linux" ]; then
        prefix="`echo $prefix | awk -v h=$HOME '{gsub(/~/,h); print}'`"
    fi
    prefix=${prefix:-/opt/swift} # set default if none given
    if [ ! "$InstallDir" ]; then
        if [ ! \( -d "$prefix" -o -h "$prefix" \) ]; then
	    answer=
	    while [ "x$answer" != "xy" -a "x$answer" != "xn" ]; do
	        printf "$prefix does not exist.  Create it? ([n]/y) "
	        read answer
	    done
	    if [ "x$answer" = "xy" ]; then
	        mkdir -p "$prefix"
	    fi
        elif [ ! -d "$prefix" ]; then
	    echo "$prefix is not a directory!"
        fi
        if [ -d "$prefix" ]; then
	    break
        fi
    else
        if [ ! \( -d "$prefix" -o -h "$prefix" \) ]; then
	    mkdir -p "$prefix"
        elif [ ! -d "$prefix" ]; then
	    echo "$prefix is not a directory!"
	    exit 0
        fi
        if [ -d "$prefix" ]; then
	    break
        fi
    fi
done