#!/bin/sh

error() {
	rc=$1; shift
	echo $* >&2
	exit $rc
}

if test "$1" = "-h" -o "$1" = "-help" -o "$1" = "--help"
then
	cat <<.
Usage: `basename $0` [BUILDDIR [SOURCEDIR]]

BUILDDIR    Location at which to build icewm (default: ../build)
SOURCEDIR   Location of icewm's sourcecode (default: .)
.
	exit
fi

BUILDDIR=${1:-../build}
SOURCEDIR=${2:-$PWD}

[ ! -d "$SOURCEDIR" ] && error 1 \
	"Invalid source directory: \`$SOURCEDIR'"
[ -e "$BUILDDIR" ] && error 1 \
	"Build directory exists: \`$BUILDDIR'"
[ "$SOURCEDIR" -ef "$BUILDDIR" ] && error 1 \
	"Identical source and build directory: \`$SOURCEDIR' and \`$BUILDDIR'"

echo "Linking from \`$SOURCEDIR' to \`$BUILDDIR'"

find $SOURCEDIR -type d -not -name CVS \
	-printf $BUILDDIR/%P\\0 | xargs -0 mkdir -p
find $SOURCEDIR -type f -not -path \*/CVS/\* \
	-printf "ln -s %p $BUILDDIR/%P\\n" | sh