System Mode: work-in-progress OTA survival (addon.d)

CommonAddon

@@ -0,0 +1,62 @@
+#!/sbin/sh
+##########################################################################################
+# 
+# NanoDroid System Mode OTA survival Script
+# by Nanolx
+# 
+# Inspired by 99-flashafterupdate.sh of osm0sis @ xda-developers
+# Forked from 99-magisk.sh of topjohnwu @ xda-developers
+# 
+##########################################################################################
+
+. /tmp/backuptool.functions
+
+MODID=@MODID@
+
+##########################################################################################
+# Stuffz
+##########################################################################################
+
+OUTFD=$(ps | grep -v grep | grep -oE "update(.*)" | cut -d" " -f3)
+
+ui_print () {
+	echo -n -e "ui_print $1\n" >> /proc/self/fd/$OUTFD
+	echo -n -e "ui_print\n" >> /proc/self/fd/$OUTFD
+}
+
+case "${1}" in
+	backup)
+		if [ -r /data/adb/.nanodroid-list ]; then
+			ui_print "${MODID} addon.d: backup"
+			cat /data/adb/.nanodroid-list | while read FILE; do
+				test -z "${FILE}" && continue
+				echo " ${S}/${FILE}"
+				backup_file "${S}/${FILE}"
+			done
+			ui_print "${MODID} addon.d: backup done"
+		fi
+	;;
+	restore)
+		if [ -r /data/adb/.nanodroid-list ]; then
+			ui_print "${MODID} addon.d: restore"
+			cat /data/adb/.nanodroid-list | while read FILE REPLACEMENT; do
+				test -z "${FILE}" && continue
+				[ -f "${C}/${S}/${FILE}" ] && restore_file "${S}/${FILE}" "${FILE}"
+			done
+			ui_print "${MODID} addon.d: restore done"
+		fi
+	;;
+	pre-backup)
+		# Stub
+	;;
+	post-backup)
+		# Stub
+	;;
+	pre-restore)
+		# Stub
+	;;
+	post-restore)
+		# Stub
+	;;
+esac
+

CommonInstaller

@@ -311,6 +311,8 @@ unpack_zip () {
 
 nanodroid_finalize () {
 	[ "${MODE}" = "MAGISK" ] && magisk_install_finish
+	[ "${MODE}" = "SYSTEM" ] && install_addond
+
 	rm -rf ${INSTALLER}
 
 	ui_print " "
@@ -852,6 +854,20 @@ install_swipe () {
 	fi
 }
 
+install_addond () {
+	if [ -d /system/addon.d ]; then
+		ui_print " << System Mode OTA survival"
+
+		cp "${INSTALLER}/CommonAddon" "/system/addon.d/91-nanodroid.sh" || \
+			error " !! failed to install System Mode OTA survival"
+
+		chmod 0755 "/system/addon.d/91-nanodroid.sh"
+		sed -e "s|@MODID@|${MODID}|g" -i "/system/addon.d/91-nanodroid.sh"
+	else
+		ui_print " << ROM does not have addon.d support"
+	fi
+}
+
 ##########################################################################################
 # Advanced Installation Functions
 ##########################################################################################