#!/bin/sh

# lh_source_usb(1) - build source image

set -e

# Source common functions
for FUNCTION in /usr/share/live-helper/functions/*.sh
do
	. ${FUNCTION}
done

# Reading configuration files
Read_conffile config/common
Read_conffile config/bootstrap
Read_conffile config/image
Set_defaults

if [ "${LIVE_SOURCE}" = "disabled" ]
then
	echo "W: source images disabled (FIXME)"
	exit 0
fi

for IMAGE in ${LIVE_SOURCE_IMAGE}
do
	if [ "${IMAGE}" = "usb" ]
	then
		# Requiring stage file
		Require_stagefile "${LIVE_ROOT}"/.stage/source_download

		# Checking lock file
		Check_lockfile "${LIVE_ROOT}"/.lock

		# Creating lock file
		Create_lockfile "${LIVE_ROOT}"/.lock

		# Checking stage file
		Check_stagefile "${LIVE_ROOT}"/.stage/source_usb

		if [ ! -f "${LIVE_CHROOT}"/sbin/mkdosfs ]
		then
			PACKAGES="${PACKAGES} dosfstools"
		fi

		if [ ! -f "${LIVE_CHROOT}"/sbin/parted ]
		then
			PACKAGES="${PACKAGES} parted"
		fi

		if [ -n "${PACKAGES}" ]
		then
			# Installing packages
			case "${LH_APT}" in
				apt)
					Chroot "apt-get install --yes ${PACKAGES}"
					;;

				aptitude)
					Chroot "aptitude install --assume-yes ${PACKAGES}"
					;;
			esac
		fi

		# Remove old source
		if [ -f "${LIVE_ROOT}"/source.img ]
		then
			rm -f "${LIVE_ROOT}"/source.img
		fi

		# Everything which comes here needs to be cleaned up,
		DU_DIM="`du -ms ${LIVE_ROOT}/source | cut -f1`"
		REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...
		dd if=/dev/zero of="${LIVE_ROOT}"/source.img bs=1024k count=${REAL_DIM}
		FREELO="`losetup -f`"
		if [ ! -b "${LIVE_CHROOT}"/${FREELO} ]
		then
			MAKEDEV="true"
			Chroot "cd /dev && ./MAKEDEV ${FREELO}"
		fi

		echo "!!! The following error/warning messages can be ignored !!!"
		lh_losetup $FREELO "${LIVE_ROOT}"/source.img 0
		Chroot "parted -s ${FREELO} mklabel msdos" || true
		Chroot "parted -s ${FREELO} mkpartfs primary fat16 0.0 100%" || true
		Chroot "parted -s ${FREELO} set 1 lba off" || true
		losetup -d ${FREELO}

		lh_losetup $FREELO "${LIVE_ROOT}"/source.img 1
		Chroot "mkfs.msdos -n DEBIAN_LIVE ${FREELO}"
		mkdir -p "${LIVE_ROOT}"/source.tmp
		mount ${FREELO} "${LIVE_ROOT}"/source.tmp
		cp -r "${LIVE_ROOT}"/source/* "${LIVE_ROOT}"/source.tmp
		umount "${LIVE_ROOT}"/source.tmp
		rmdir "${LIVE_ROOT}"/source.tmp
		losetup -d ${FREELO}
		echo "!!! The above error/warning messages can be ignored !!!"

		if [ -n "${MAKEDEV}" ]
		then
			rm -f "${LIVE_CHROOT}"/${FREELO}
		fi

		if [ -n "${PACKAGES}" ]
		then
			# Removing packages
			case "${LH_APT}" in
				apt)
					Chroot "apt-get remove --purge --yes ${PACKAGES}"
					;;

				aptitude)
					Chroot "aptitude purge --assume-yes ${PACKAGES}"
					;;
			esac
		fi

		# Creating stage file
		Create_stagefile "${LIVE_ROOT}"/.stage/source_usb
	fi
done