#!/bin/sh

# lh_binary_net(1) - build netboot binary image
# Copyright (C) 2006-2009 Daniel Baumann <daniel@debian.org>
#
# live-helper comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
# This is free software, and you are welcome to redistribute it
# under certain conditions; see COPYING for details.

set -e

# Including common functions
. "${LH_BASE:-/usr/share/live-helper}"/functions.sh

# Setting static variables
DESCRIPTION="$(Echo 'build netboot binary image')"
HELP=""
USAGE="${PROGRAM} [--force]"

Arguments "${@}"

# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

if ! In_list net "${LH_BINARY_IMAGES}"
then
	exit 0
fi

if [ "${LH_NET_TARBALL}" = "none" ]
then
	exit 0
fi

Echo_message "Begin building binary netboot image..."

# Requiring stage file
Require_stagefile .stage/config .stage/bootstrap

# Checking stage file
Check_stagefile .stage/binary_net

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

if [ "${LH_ARCHITECTURE}" = "sparc" ]
then
	# Checking depends
	Check_package chroot/usr/bin/elftoaout sparc-utils

	# Restoring cache
	Restore_cache cache/packages_binary

	# Installing depends
	Install_package

	# Set target and source directories
	DESTDIR="tftpboot"
	case "${LH_INITRAMFS}" in
		casper)
			ORIGDIR="binary/casper"
			;;

		live-initramfs)
			ORIGDIR="binary/live"
			;;
	esac

	# Find defaults
	DEFAULT_FLAVOUR="$(echo ${LH_LINUX_FLAVOURS} | awk '{ print $1 }')"
	DEFAULT_KERNEL="$(basename chroot/boot/vmlinuz-*${DEFAULT_FLAVOUR})"
	DEFAULT_INITRD="initrd.img-$(echo ${DEFAULT_KERNEL} | sed -e 's|vmlinuz-||')"
	DEFAULT_MAP="$(echo chroot/boot/System.map-*${DEFAULT_FLAVOUR})"

	gzip -cd ${ORIGDIR}/${DEFAULT_KERNEL} > kernel.tmp

	mkdir -p ${DESTDIR}
	rm -f ${DESTDIR}/boot.img
	elftoaout -o ${DESTDIR}/boot.img kernel.tmp

	case "${DEFAULT_FLAVOUR}" in
		sparc32)
			piggyback ${DESTDIR}/boot.img ${DEFAULT_MAP} ${ORIGDIR}/${DEFAULT_INITRD}
			;;
		sparc64)
			piggyback64 ${DESTDIR}/boot.img ${DEFAULT_MAP} ${ORIGDIR}/${DEFAULT_INITRD}
			;;
		*)
			Echo_error "Invalid default kernel flavour for sparc \"%s\"" "${DEFAULT_FLAVOUR}"
			exit 1;
			;;
	esac

	# Pad boot.img
	REMAINDER=$((( 4 - $(stat -c %s ${DESTDIR}/boot.img) % 4 ) % 4))
	dd if=/dev/zero bs=1 count=${REMAINDER} >> ${DESTDIR}/boot.img

	# No need for kernel and initrd images in the binary
	rm -f ${ORIGDIR}/vmlinuz-*
	rm -f ${ORIGDIR}/initrd.img-*

	# Clean temporaries
	rm -f kernel.tmp

	# Saving cache
	Save_cache cache/packages_binary

	# Removing depends
	Remove_package
fi

# Remove old binary
rm -f binary-net.tar.bz2
rm -f binary-net.tar.gz
rm -f binary-net.tar

# Creating image file
ROOT_DIR=$(basename ${LH_NET_ROOT_PATH})
if [ "${ROOT_DIR}" = "chroot" ]
then
	mv chroot chroot.tmp
fi

if [ "${ROOT_DIR}" != "binary" ]
then
	mv binary ${ROOT_DIR}
fi

mkdir binary.tmp
mv ${ROOT_DIR} tftpboot binary.tmp
cd binary.tmp

case "${LH_NET_TARBALL}" in
	bzip2)
		tar cfj ../binary-net-tar.bz2 *
		;;

	gzip)
		if gzip --help | grep -qs "\-\-rsyncable"
		then
			tar cf ../binary-net.tar *
			gzip --rsyncable --best ../binary-net.tar
		else
			tar cfz ../binary-net.tar.gz *
		fi
		;;

	tar)
		tar cf ../binary-net.tar *
		;;
esac

mv * ../
cd "${OLDPWD}"
rmdir binary.tmp

if [ "${ROOT_DIR}" != "binary" ]
then
	mv ${ROOT_DIR} binary
fi

if [ "${ROOT_DIR}" = "chroot" ]
then
	mv chroot.tmp chroot
fi

# Creating stage file
Create_stagefile .stage/binary_net