#$Id$



#variables
#XXX insert i386-specific variables here (grub...)


#includes
source "`dirname $0`/Apps/Devel/src/scripts/targets/Linux"


#functions
#private
_image_image()
{
	USAGE="Options for $IMAGE_TYPE on $TARGET:\n\
  IMAGE_FILE	Where to write the filesystem image\n\
  IMAGE_KERNEL	Path to the kernel\n\
  IMAGE_SIZE	Size of the filesystem image in kilobytes\n\
  MKFS		Command used to create the filesystem"

	#sanity check
	check "$USAGE" DD DESTDIR DEVZERO IMAGE_FILE IMAGE_KERNEL IMAGE_SIZE \
		MKDIR MKFS MOUNT UMOUNT

	$MKDIR "$DESTDIR"					|| exit 2
	$UMOUNT "$DESTDIR"
	$DD if="$DEVZERO" of="$IMAGE_FILE" count="$IMAGE_SIZE" &&
	$MKFS "$IMAGE_FILE"					|| exit 2
	$MOUNT "$IMAGE_FILE" "$DESTDIR"				|| exit 2
	target "install"
	RET=$?
	$UMOUNT "$DESTDIR"
	exit $RET
}


_image_iso()
{
	USAGE="Options for $IMAGE_TYPE on $TARGET:\n\
  IMAGE_FILE	Where to write the filesystem image\n\
  IMAGE_KERNEL	Path to the kernel\n\
  IMAGE_MODULES	Path to a tar.gz archive of kernel modules (optional)\n\
  IMAGE_RAMDISK	Path to the ramdisk (optional)\n\
  IMAGE_SIZE	Size of the filesystem image in kilobytes\n\
  KERNEL_ARGS	Additional arguments to give to the kernel (optional)\n\
  MKISOFS	Command used to create the ISO image"

	#sanity check
	check "$USAGE" DESTDIR KERNEL IMAGE_FILE IMAGE_KERNEL IMAGE_SIZE \
		INSTALL MKDIR MKISOFS MOUNT RAMDISK TAR UMOUNT

	$MKDIR "$DESTDIR/boot/grub"				|| exit 2
	$INSTALL -m 644 "/usr/lib/grub/i386-pc/stage2_eltorito" \
	"$DESTDIR/boot/grub"					|| exit 2
	$INSTALL -m 755 "$IMAGE_KERNEL" "$DESTDIR/$KERNEL"	|| exit 2
	if [ ! -z "$IMAGE_RAMDISK" ]; then
		$INSTALL -m 644 "$IMAGE_RAMDISK" "$DESTDIR/$RAMDISK"
		GRUB_INITRD="initrd $RAMDISK"
	fi
	$CAT > "$DESTDIR/boot/grub/menu.lst" << EOF
default 0
timeout 10

title $VENDOR
kernel $KERNEL $KERNEL_ARGS
$GRUB_INITRD
EOF
	[ ! -z "$IMAGE_MODULES" ] && cat "$IMAGE_MODULES" | \
			(cd "$DESTDIR" && $TAR -xzf -)
	$MKISOFS -b "boot/grub/stage2_eltorito" -no-emul-boot \
			-boot-load-size 4 -boot-info-table \
			-o "$IMAGE_FILE" "$DESTDIR"
}


_image_ramdisk()
{
	USAGE="Options for $IMAGE_TYPE on $TARGET:\n\
  IMAGE_FILE	Where to write the filesystem image\n\
  IMAGE_SIZE	Size of the filesystem image in kilobytes\n\
  MKFS		Command used to format the ramdisk image\n\
  MOUNTPOINT	Path where to temporarily mount the ramdisk image"

	#sanity check
	check "$USAGE" DD DEVZERO DU GZIP IMAGE_FILE IMAGE_SIZE INSTALL LN \
	MKDIR MKFS MOUNTPOINT MV UMOUNT

	$MKDIR "$MOUNTPOINT"
	$UMOUNT "$MOUNTPOINT"
	$DD if="$DEVZERO" of="$IMAGE_FILE" count="$IMAGE_SIZE"	|| exit 2
	$MKFS "$IMAGE_FILE"					|| exit 2
	[ ! -z "$TUNE2FS" ] && $TUNE2FS -i 0 "$IMAGE_FILE"
	#FIXME umount on subsequent failures
	$MOUNT "$IMAGE_FILE" "$MOUNTPOINT"			|| exit 2

	#compile and install linuxrc
	SUBDIRS="Apps/Unix/src/others/tools" target linuxrc	|| exit 2

	DESTDIR="$MOUNTPOINT" _create_directories "dev" "proc" "mnt/cdrom" \
		"sbin"
	$LN "../mnt/cdrom/usr/bin/sh" "$MOUNTPOINT/sbin/init"
	$INSTALL -m 755 "Apps/Unix/src/others/tools/linuxrc" \
	"$MOUNTPOINT/linuxrc"					|| exit 2
	$UMOUNT "$MOUNTPOINT"

	echo
	echo -n "Compressing ramdisk:"
	$GZIP "$IMAGE_FILE"					|| exit 2
	$MV "$IMAGE_FILE.gz" "$IMAGE_FILE"			|| exit 2
	echo
	$DU "$IMAGE_FILE"
}


#public
target_image()
{
	case "$IMAGE_TYPE" in
		"iso")
			_image_iso
			;;
		"ramdisk")
			_image_ramdisk
			;;
		*)
			_image_image
			;;
	esac
}