build: add a build step for generic sysupgrade nand image

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 46784

include/image.mk

@@ -390,6 +390,14 @@ define Build/combined-image
 	@mv $@.new $@
 endef
 
+define Build/sysupgrade-nand
+	sh $(TOPDIR)/scripts/sysupgrade-nand.sh \
+		--board $(if $(BOARD_NAME),$(BOARD_NAME),$(DEVICE_NAME)) \
+		--kernel $(word 1,$^) \
+		--rootfs $(word 2,$^) \
+		$@
+endef
+
 define Device/Init
   PROFILES := $(PROFILE)
   DEVICE_NAME := $(1)

scripts/sysupgrade-nand.sh

@@ -0,0 +1,68 @@
+#!/bin/sh
+
+board=""
+kernel=""
+rootfs=""
+outfile=""
+err=""
+
+while [ "$1" ]; do
+	case "$1" in
+	"--board")
+		board="$2"
+		shift
+		shift
+		continue
+		;;
+	"--kernel")
+		kernel="$2"
+		shift
+		shift
+		continue
+		;;
+	"--rootfs")
+		rootfs="$2"
+		shift
+		shift
+		continue
+		;;
+	*)
+		if [ ! "$outfile" ]; then
+			outfile=$1
+			shift
+			continue
+		fi
+		;;
+	esac
+done
+
+if [ ! -n "$board" -o ! -r "$kernel" -a  ! -r "$rootfs" -o ! "$outfile" ]; then
+	echo "syntax: $0 [--board boardname] [--kernel kernelimage] [--rootfs rootfs] out"
+	exit 1
+fi
+
+tmpdir="$( mktemp -d 2> /dev/null )"
+if [ -z "$tmpdir" ]; then
+	# try OSX signature
+	tmpdir="$( mktemp -t 'ubitmp' -d )"
+fi
+
+if [ -z "$tmpdir" ]; then
+	exit 1
+fi
+
+mkdir -p "${tmpdir}/sysupgrade-${board}"
+echo "BOARD=${board}" > "${tmpdir}/sysupgrade-${board}/CONTROL"
+[ -z "${rootfs}" ] || cp "${rootfs}" "${tmpdir}/sysupgrade-${board}/root"
+[ -z "${kernel}" ] || cp "${kernel}" "${tmpdir}/sysupgrade-${board}/kernel"
+
+(cd "$tmpdir"; tar cvf sysupgrade.tar sysupgrade-${board})
+err="$?"
+if [ -e "$tmpdir/sysupgrade.tar" ]; then
+	cp "$tmpdir/sysupgrade.tar" "$outfile"
+else
+	err=2
+fi
+rm -rf "$tmpdir"
+
+exit $err