#$Id$
#Copyright (c) 2009 Pierre Pronchery <khorben@defora.org>



#variables
[ -z "$LD"	] && LD="$CC -shared -nostdlib"
[ -z "$LN"	] && LN="ln -f"
[ -z "$MKFS"	] && MKFS="mkfs.jffs2 -n -e 0x4000 -l -q -r $DESTDIR -X zlib -o"


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


#functions
#private
#image_ramdisk
_image_ramdisk()
{
	USAGE="Options for $IMAGE_TYPE on $TARGET:\n\
  IMAGE_FILE	Where to write the filesystem image\n\
  MKFS		Command used to format the filesystem"

	#sanity check
	check "$USAGE" DU GZIP IMAGE_FILE MKFS

	target "install"					|| exit 2

	_create_directories "bin" "dev" "lib" "proc" "mnt/root"

	echo
	echo -n "Fixing installation paths:"
	echo -n " /lib/libc.so"
	$MV "$DESTDIR$PREFIX/lib/libc.so.0.0" "$DESTDIR/lib/libc.so.0.0" \
								|| exit 2
	$LN -s "libc.so.0.0" "$DESTDIR/lib/libc.so"		|| exit 2
	$LN -s "libc.so.0.0" "$DESTDIR/lib/libc.so.0"		|| exit 2
	$LN -s "/lib/libc.so.0.0" "$DESTDIR$PREFIX/lib/libc.so.0.0" \
								|| exit 2
	echo -n " /bin/sh"
	$MV "$DESTDIR$PREFIX/bin/sh" "$DESTDIR/bin/sh"		|| exit 2
	echo

	if [ ! -x "$DESTDIR/sbin/init" ]; then
		echo
		echo -n "Installing linuxrc:"
		cat > "$DESTDIR/linuxrc" << EOF
#!/bin/sh

echo "init called with arguments: \$@"
echo "Falling back to interactive mode:"
/bin/sh
EOF
		chmod 755 "$DESTDIR/linuxrc"
		echo
	fi

	echo
	echo -n "Building ramdisk image:"
	$MKFS "$IMAGE_FILE"					|| exit 2
	echo
	$DU "$IMAGE_FILE"

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


#image_rootfs
_image_rootfs()
{
	#FIXME make IMAGE_SIZE optional and use ext2 then
	USAGE="Options for $IMAGE_TYPE on $TARGET:\n\
  IMAGE_FILE	Where to write the filesystem image\n\
  IMAGE_MODULES	Path to a tar.gz archive of kernel modules (optional)\n\
  MKFS		Command used to format the filesystem"

	#sanity check
	check "$USAGE" DESTDIR DU GZIP IMAGE_FILE MKFS MV SUDO TAR

	target "install"					|| exit 2

	_create_directories "bin" "dev" "etc" "lib" "sbin"

	echo
	echo -n "Fixing installation paths:"
	for i in /lib/libc.so /bin/sh; do
		echo -n " $i"
		$MV "$DESTDIR$PREFIX$i" "$DESTDIR$i"		|| exit 2
	done
	echo

	echo
	echo -n "Creating device nodes:"
	for i in std pty console input fb; do
		echo -n " $i"
		(cd "$DESTDIR/dev" && $SUDO sh /sbin/MAKEDEV "$i")
	done
	echo

	if [ ! -z "$KERNEL_MODULES" ]; then
		echo
		echo "Installing kernel modules:"
		#progress -ef "$KERNEL_MODULES" -- gunzip -c \
		$GZIP -dc "$KERNEL_MODULES" \
				| (cd "$DESTDIR" && $TAR -xf -)	|| exit 2
	fi

	if [ ! -x "$DESTDIR/sbin/init" ]; then
		echo
		echo -n "Installing init:"
		cat > "$DESTDIR/sbin/init" << EOF
#!/bin/sh

echo "init called with arguments: \$@"
echo "Falling back to interactive mode:"
/bin/sh
EOF
		chmod 755 "$DESTDIR/sbin/init"
		echo
	fi

	echo
	echo "Building rootfs image:"
	$MKFS "$IMAGE_FILE"				|| exit 2
	$DU "$IMAGE_FILE"

	echo
	echo "Building tarball:"
	OLDPWD="$PWD"
	(cd "$DESTDIR" && $TAR -cvzf "$OLDPWD/$IMAGE_FILE.tar.gz" .) \
	| while read filename; do
		echo -en "\r$filename"
	done || (echo && exit 2)
	echo -en "\r"
	$DU "$IMAGE_FILE.tar.gz"
}


#public
#target_image
target_image()
{
	case "$IMAGE_TYPE" in
		"ramdisk")
			_image_ramdisk
			;;
		"rootfs"|*)
			_image_rootfs
			;;
	esac
}