treewide: sysupgrade: pass "save_partitions" option to the "sysupgrade" method

This explicitly lets stage2 know if partitions should be preserved. No
more "touch /tmp/sysupgrade.always.overwrite.bootdisk.partmap" hack.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

package/base-files/files/lib/upgrade/stage2

@@ -6,8 +6,6 @@
 export IMAGE="$1"
 COMMAND="$2"
 
-export SAVE_PARTITIONS=1
-
 export INTERACTIVE=0
 export VERBOSE=1
 export CONFFILES=/tmp/sysupgrade.conffiles
@@ -16,9 +14,6 @@ export CONF_TAR=/tmp/sysupgrade.tgz
 RAMFS_COPY_BIN=		# extra programs for temporary ramfs root
 RAMFS_COPY_DATA=	# extra data files
 
-
-[ -f /tmp/sysupgrade.always.overwrite.bootdisk.partmap ] && export SAVE_PARTITIONS=0
-
 include /lib/upgrade
 
 

package/base-files/files/sbin/sysupgrade

@@ -351,12 +351,6 @@ if [ $TEST -eq 1 ]; then
 	exit 0
 fi
 
-if [ $SAVE_PARTITIONS -eq 0 ]; then
-	touch /tmp/sysupgrade.always.overwrite.bootdisk.partmap
-else
-	rm -f /tmp/sysupgrade.always.overwrite.bootdisk.partmap
-fi
-
 install_bin /sbin/upgraded
 v "Commencing upgrade. Closing all shell sessions."
 
@@ -371,7 +365,8 @@ else
 		\"path\": $(json_string "$IMAGE"),
 		\"command\": $(json_string "$COMMAND"),
 		\"options\": {
-			\"save_config\": $SAVE_CONFIG
+			\"save_config\": $SAVE_CONFIG,
+			\"save_partitions\": $SAVE_PARTITIONS
 		}
 	}"
 fi

target/linux/apm821xx/base-files/lib/upgrade/wdbook.sh

@@ -43,7 +43,7 @@ mbl_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/brcm2708/base-files/lib/upgrade/platform.sh

@@ -45,7 +45,7 @@ platform_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/mvebu/base-files/lib/upgrade/sdcard.sh

@@ -49,7 +49,7 @@ platform_do_upgrade_sdcard() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/omap/base-files/lib/upgrade/platform.sh

@@ -45,7 +45,7 @@ platform_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/sunxi/base-files/lib/upgrade/platform.sh

@@ -45,7 +45,7 @@ platform_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/tegra/base-files/lib/upgrade/platform.sh

@@ -62,7 +62,7 @@ platform_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image

target/linux/x86/base-files/lib/upgrade/platform.sh

@@ -54,7 +54,7 @@ platform_do_upgrade() {
 
 	sync
 
-	if [ "$SAVE_PARTITIONS" = "1" ]; then
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
 		get_partitions "/dev/$diskdev" bootdisk
 
 		#extract the boot sector from the image