#! /bin/sh

TEMPROOT=${1:-/usr/local/storage/dest/temproot/`uname -m`}

# Check that the temproot is there
if [ ! -d "${TEMPROOT}" ]; then
	echo "Temproot ${TEMPROOT} missing"
	exit 1
fi

cd "${TEMPROOT}"

# First we must copy the /usr/lib content to /usr/lib so that all copied
# binaries will find their libs
if [ -d "usr/lib" ]; then
	tar cf - "usr/lib" | tar -C / -p -h -x -f -
fi

# Now copy everything over 
for DIR in /usr/{X11R6,bin,games,include,lib,libdata,libexec,mdec,sbin,share} ; do
	echo "${DIR}"
	if [ ! -d "${DIR}" ]; then
		echo "Ignoring directory ${DIR}"
	elif [ ! -d "${TEMPROOT}${DIR}" ]; then
		echo "Ignoring directory ${DIR}, source dir is missing"
	else
		RELDIR=`echo ${DIR} | sed 's/^\/*//g'`;
		mount | awk '{ print $3; }' | grep "^${DIR}$" >/dev/null
		let ISMOUNTPOINT=$?
		if [[ ${ISMOUNTPOINT} -eq 0 ]]; then
			mkdir "${DIR}/.old" \
				&& mv "${DIR}"/* "${DIR}/.old" \
				&& tar cf - ${RELDIR} | tar -C / -p -h -x -f - \
				&& rm -rf "${DIR}/.old"
		else
			mv "${DIR}" "${DIR}.old" \
				&& tar cf - ${RELDIR} | tar -C / -p -h -x -f - \
				&& rm -rf "${DIR}.old"
		fi
		sync
	fi
done