#!/sbin/sh

VERSION=23.1.2.20210117
NANODROID_UPGRADE=0
INSTALL_SUCCESS=TRUE
NANODROID_LIST=/system/addon.d/NanoDroid_FileList
NANODROID_LIST_OLD=/data/adb/NanoDroid_FileList

STORAGE=/data/media/0
curdate=$(date +%Y%m%d_%H.%M.%S)
nanodroid_logfile="${STORAGE}/nanodroid_logs/${MODID}_${VERSION}_log_${curdate}.log"

config_locations="${STORAGE} /external_sd /sdcard /sdcard1 /data /system/addon.d /tmp"

nanodroid_all_init='"10_sqlite 20_fstrim 30_logcat 40_external_sd 50_logscleaner"'

##########################################################################################
# NanoDroid Installer Setup Function
##########################################################################################

setup_installer () {
	detect_bootmode
	detect_outfd
	#check_space
	show_progress 1.0 0

	show_banner
	set_progress 0.1

	unpack_zip
	setup_busybox
	mount_partitions
	detect_arch
	set_progress 0.2

	if ${BOOTMODE}; then
		media_rw=$(grep "^/dev/block.*/mnt/media_rw" /proc/mounts \
		| cut -d " " -f 2 \
		| cut -d "/" -f 4)
		ext_storage="/storage/${media_rw}"

		[ -r "${ext_storage}" ] && config_locations="${ext_storage} ${config_locations}"
	fi

	[ -n "${1}" ] && get_cfg_setup
	[ -n "${2}" ] && get_cfg_overlay
	[ -n "${3}" ] && get_cfg_apps

	detect_mode
	set_progress 0.3
}

##########################################################################################
# Misc. Functions
##########################################################################################

##########################################################################################
# Debug Echo: only echo in TWRP, in Magisk Manager print to logfile
##########################################################################################

decho () {
	mkdir -p "${STORAGE}/nanodroid_logs"

	if ${BOOTMODE}; then
		echo "$@" >> "${nanodroid_logfile}"
	else
		echo "$@"
	fi
}

##########################################################################################
# use print_info() instead of ui_print() to avoid spamming Magisk Manager output
##########################################################################################

print_info () {
	if ${BOOTMODE}; then
		echo "${@}"
		decho "${@}"
	else
		echo -n -e "ui_print ${@}\n" >> /proc/self/fd/${OUTFD}
		echo -n -e "ui_print\n" >> /proc/self/fd/${OUTFD}
	fi
}

show_progress() {
	${BOOTMODE} || echo "progress ${1} ${2}" >> /proc/self/fd/${OUTFD}
}

set_progress() {
	${BOOTMODE} || echo "set_progress ${1}" >> /proc/self/fd/${OUTFD}
}

##########################################################################################
# Error out with proper cleanup
##########################################################################################

error () {
	print_info " !!"
	print_info "${@}"
	print_info " !!"

	if is_mounted /data; then
		[ "${MODE}" = "MAGISK" ] && rm -rf "${MODPATH}"

		installer_cleanup_env

		INSTALL_SUCCESS=FALSE
		nanodroid_storelogs
	fi

	${BOOTMODE} || umount_partitions

	exit 1
}

##########################################################################################
# Taken from Magisk, check where to print to
##########################################################################################

detect_outfd () {
	if [ -z $OUTFD ] || readlink /proc/$$/fd/$OUTFD | grep -q /tmp; then
		# We will have to manually find out OUTFD
		for FD in `ls /proc/$$/fd`; do
			if readlink /proc/$$/fd/$FD | grep -q pipe; then
				if ps | grep -v grep | grep -q " 3 $FD "; then
					OUTFD=$FD
					break
				fi
			fi
		done
	fi
}

##########################################################################################
# XXX - unused - Check if enough free space in /dev/tmp
##########################################################################################

check_space () {
	space_required=524288
	space_available=$(df /dev 2>/dev/null | awk '/tmpfs/{print $4}')

	decho "  required space : ${space_required}"
	decho "  available space: ${space_available}"

	if [ ${space_available} -lt ${space_required} ]; then
		error "Less than 512 MB free space availabe from TWRP!"
	fi
}

##########################################################################################
# Taken from Magisk, check whether we're in Magisk Manager or TWRP
##########################################################################################

detect_bootmode () {
	[ -z ${BOOTMODE} ] && ps | grep zygote | grep -qv grep && BOOTMODE=true
	[ -z ${BOOTMODE} ] && ps -A 2>/dev/null | grep zygote | grep -qv grep && BOOTMODE=true
	[ -z ${BOOTMODE} ] && BOOTMODE=false
}

##########################################################################################
# Taken from Magisk, grep build_props / /proc/cmdline for value
##########################################################################################

grep_prop() {
	sed -n "s/^${1}=//p" /system/build.prop ${2} | head -n 1
}

grep_cmdline() {
	local REGEX="s/^${1}=//p"
	sed -E 's/ +/\n/g' /proc/cmdline | \
		sed -n "${REGEX}" 2>/dev/null
}

##########################################################################################
# Set permissions for installed files
##########################################################################################

set_perm () {
	chown ${2}:${3} ${1} || error "failed change owner for ${1}"
	chmod ${4} ${1} || error "failed to change mode for ${1}"

	if [ -n "${5}" ]; then
		chcon ${5} ${1} 2>/dev/null
	else	chcon 'u:object_r:system_file:s0' ${1} 2>/dev/null
	fi
}

set_perm_recursive() {
	find ${1} -type d 2>/dev/null | while read dir; do
		set_perm ${dir} ${2} ${3} ${4} ${6}
	done
	find ${1} -type f 2>/dev/null | while read file; do
		set_perm ${file} ${2} ${3} ${5} ${6}
	done
}

set_perm_data () {
	if [ "${1}" = "-r" ]; then
		decho "    perm: data [recursive] {${2}}"
		set_perm_recursive ${2} 0 0 0755 0644
	else
		decho "    perm: data [single] {${1}}"
		set_perm ${1} 0 0 0644
	fi
}

set_perm_bin () {
	if [ "${1}" = "-r" ]; then
		decho "    perm: exec [recursive] {${2}}"
		set_perm_recursive ${2} 0 0 0755 0755
	else
		decho "    perm: exec [single] {${1}}"
		set_perm ${1} 0 0 0755
	fi
}

##########################################################################################
# Taken from Magisk, mount functions
# Modified for NanoDroid
##########################################################################################

is_mounted () {
	grep -q " $(readlink -f ${1}) " /proc/mounts 2>/dev/null
	return $?
}

##########################################################################################
# taken from Magisk, with minor modifications for NanoDroid
# mount partitions
##########################################################################################

toupper() {
	echo "$@" | tr '[:lower:]' '[:upper:]'
}

find_block () {
	local block tmp partname devname device

	block=${1}${SLOT}
	device=$(find /dev/block \( -type b -o -type c -o -type l \) -name ${block} | head -n 1)

	if [ ! -z ${device} ]; then
		readlink -f ${device}
		return 0
	fi

	for uevent in /sys/dev/block/*/uevent; do
		partname=$(awk -F= '/PARTNAME/{print $2}' ${uevent})
		devname=$(awk -F= '/DEVNAME/{print $2}' ${uevent})
		if [ "$(toupper ${block})" = "$(toupper ${partname})" ]; then
			echo /dev/block/${devname}
			return 0
		fi
	done

	device=$(find /dev \( -type b -o -type c -o -type l \) -maxdepth 1 -iname ${block} | head -n 1)
	if [ ! -z ${device} ]; then
		readlink -f ${device}
		return 0
	fi

	return 1

}

mount_partitions () {
	if ! ${BOOTMODE}; then
		VENDOR_COMPAT=FALSE
		SYSTEM_AS_ROOT=FALSE

		SLOT=$(grep_cmdline androidboot.slot_suffix)
		if [ -z ${SLOT} ]; then
			SLOT=$(grep_cmdline androidboot.slot)
			[ -z ${SLOT} ] || SLOT=_${SLOT}
		fi
		[ -z ${SLOT} ] && DEVICE_AB=FALSE || DEVICE_AB=TRUE
		decho " INFO: #1 [SLOT] ${SLOT}"

		is_mounted /data || mount /data || decho "failed to mount /data!"

		mount -o bind /dev/urandom /dev/random

		SYSTEM_BLOCK=$(find_block system)
		decho " INFO: #5 [SYSTEM_BLOCK] ${SYSTEM_BLOCK}"

		if is_mounted /system_root; then
			umount /system 2&>/dev/null
			umount /system_root 2&>/dev/null
		fi

		mkdir -p /system /system_root
		mount -o rw ${SYSTEM_BLOCK} /system

		if [ -f /system/build.prop ]; then
			SYSTEM=/system
		elif [ -f /system/system/build.prop -o -f /system/init -o -L /system/init ]; then
			SYSTEM_AS_ROOT=true
			SYSTEM=/system/system
			if ! mount --move /system /system_root; then
				umount /system
				umount -l /system
				mount -o rw ${SYSTEM_BLOCK} /system_root
			fi
			mount -o bind /system_root/system /system
		fi

		VENDOR_BLOCK=$(find_block vendor)
		decho " INFO: #7 [VENDOR_BLOCK] ${VENDOR_BLOCK}"

		! is_mounted /vendor && mount -o ro /vendor
		! is_mounted /vendor && mount -o ro ${VENDOR_BLOCK} /vendor

		if [[ ! $(is_mounted /vendor) && -d /system/vendor ]]; then
			### XXX work-around required for some devices
			VENDOR_COMPAT=TRUE
			ln -sf /system/vendor /vendor >/dev/null
		fi

		decho " INFO: #8 [prop]"
		ls -l /system/*.prop

		[ -d /system/apex ] && mount_apex
	fi

	[ ! -f /system/build.prop ] && error "failed to mount /system (unsupported A/B device?)"

	if [ -d /apex/com.android.art ]; then
		export ANDROID_ART_ROOT=/apex/com.android.art
		export ANDROID_RUNTIME_ROOT=${ANDROID_ART_ROOT}
	elif [ -d /apex/com.android.runtime ]; then
		export ANDROID_RUNTIME_ROOT=/apex/com.android.runtime
	fi

	export ANDROID_TZDATA_ROOT=/apex/com.android.tzdata
	export ANDROID_I18N_ROOT=/apex/com.android.i18n
}

##########################################################################################
# taken from Magisk, with minor modifications for NanoDroid
# mount APEX directories or images
##########################################################################################

mount_apex () {
	mkdir -p /apex

	for apex in /system/apex/*; do
		apex_mount="/apex/$(basename ${apex} .apex)"
		apex_loop="/dev/loop_apex_$(basename ${apex} .apex)"

		[ "${apex_mount}" == /apex/com.android.runtime.release ] && apex_mount=/apex/com.android.runtime
		[ "${apex_mount}" == /apex/com.android.runtime.debug ] && apex_mount=/apex/com.android.runtime
		[ "${apex_mount}" == /apex/com.android.art.release ] && apex_mount=/apex/com.android.art
		[ "${apex_mount}" == /apex/com.android.art.debug ] && apex_mount=/apex/com.android.art

		mkdir -p "${apex_mount}"

		if [ -f "${apex}" ]; then
			unzip -oq "${apex}" apex_payload.img -d /apex
			mount_apex_loop "${apex_mount}" || error "APEX loop setup failed!"
		elif [ -d "${apex}" ]; then
			mount -o bind "${apex}" "${apex_mount}"
		fi
	done

	echo " INFO: #10 [APEX [ALL]] $(ls /system/apex/*)"
}

##########################################################################################
# taken from Magisk, with minor modifications for NanoDroid
# helper function for mounting APEX directories or images
##########################################################################################

mount_apex_loop () {
	local number=0
	local minorx=1
	local loop

	[ -e /dev/block/loop1 ] && minorx=$(stat -Lc '%T' /dev/block/loop1)

	apex_mount="${1}"

	decho " *** mount_apex_loop [apex_mount]: ${apex_mount}"

	while [ ${number} -lt 64 ]; do
		loop=/dev/block/loop${number}
		[ -e ${loop} ] || mknod ${loop} b 7 $((number * minorx))

		if losetup "${loop}" /apex/apex_payload.img 2>/dev/null; then
			decho " *** mount_apex_loop [loop]: ${loop}"
			if mount -text4 -oro,noatime "${loop}" "${apex_mount}"; then
				rm -f /apex/apex_payload.img
				break
			fi
		fi

		number=$((number + 1))
	done
}

##########################################################################################
# unmount partitions
##########################################################################################

umount_partitions () {
	umount -l /system_root 2>/dev/null
	umount -l /system 2>/dev/null
	umount -l /system/vendor 2>/dev/null
	umount -l /vendor 2>/dev/null
	umount -l /dev/random 2>/dev/null

	mount | awk '/ \/apex/{print $1 " " $3}' | while read apex_loop apex_mount; do
		umount -l "${apex_mount}" 2>/dev/null
		losetup -d "${apex_loop}" 2>/dev/null
	done

	rm -rf /apex

	unset ANDROID_RUNTIME_ROOT
	unset ANDROID_TZDATA_ROOT
}

##########################################################################################
# migrate from Nanolx to Official APKs and vice-versa
##########################################################################################

detect_migrate_apk () {
	local app_id="${1}"
	local app_name="${2}"

	USER_PATH=$(find /data/app -type d -name "${app_id}-*" &>/dev/null)

	if [ -n ${USER_PATH} ]; then
		if ${UNZIP} -l "${MODPATH}/system/priv-app/${app_name}/${app_name}.apk" | grep META-INF/NANOLX.RSA &>/dev/null; then
			BUILD_INST=Nanolx
		else	BUILD_INST=Official
		fi

		if ${UNZIP} -l "${USER_PATH}/base.apk" | grep META-INF/NANOLX.RSA &>/dev/null; then
			BUILD_USER=Nanolx
		else	BUILD_USER=Official
		fi

		if [ "${BUILD_INST}" != "${BUILD_USER}" ]; then
			decho "    + Removing ${BUILD_USER} ${app_name} in favor of ${BUILD_INST} ${app_name}"
			rm -rf "${USER_PATH}"

			if [ "${app_id}" = "com.google.android.gms" ]; then
				decho "    + Resetting GCM/FCM connection of all apps to allow re-registration"
				find /data/data/*/shared_prefs -name com.google.android.gms.*.xml -delete
			fi
		fi
	fi

}

##########################################################################################
# check if ROM has native fake signature spoofing support
# origingally by @ale5000 - revised by me
##########################################################################################

check_fake_package_signature () {
	PERMISSION=android.permission.FAKE_PACKAGE_SIGNATURE
	PERMISSION_OD=$(echo -n "${PERMISSION}" | od -A n -t x1 | tr -d '\n' | sed -e 's/^ //g;s/ /00/g')
	PATCH_TYPE=""
	FRAMEWORKRES_PATCH=false
	SERVICESJAR_PATCH=false

	mkdir -p ${TMPDIR}/sigcheck

	# natively patched ROM: only framework-res.apk patched (old)
	# natively patched ROM: both framework-res.apk and services.jar patched (new)
	# self patched ROM: only services.jar patched

	# check framework-res.apk for the patch
	unzip -oq /system/framework/framework-res.apk -d "${TMPDIR}/sigcheck" \
		|| error "failed to unpack framework-res.apk"

	grep -qF "${PERMISSION}" "${TMPDIR}"/sigcheck/AndroidManifest.xml && FRAMEWORKRES_PATCH=true
	od -A n -t x1 "${TMPDIR}"/sigcheck/AndroidManifest.xml | tr -d ' \n' | grep -qF "${PERMISSION_OD}" && FRAMEWORKRES_PATCH=true

	# check services.jar for the patch
	unzip -oq /system/framework/services.jar -d "${TMPDIR}/sigcheck" \
		|| error "failed to unpack services.jar"

	grep -qF "${PERMISSION}" "${TMPDIR}"/sigcheck/*.dex && SERVICESJAR_PATCH=true
	od -A n -t x1 "${TMPDIR}"/sigcheck/*.dex | tr -d ' \n' | grep -qF "${PERMISSION_OD}" && SERVICESJAR_PATCH=true

	# we don't use this anywhere (except in SysTest log),
	# but may still come in hand in the future
	if ${FRAMEWORKRES_PATCH} && ! ${SERVICESJAR_PATCH}; then
		PATCH_TYPE="native_old"
	elif ${FRAMEWORKRES_PATCH} && ${SERVICESJAR_PATCH}; then
		PATCH_TYPE="native_new"
	elif ! ${FRAMEWORKRES_PATCH} && ${SERVICESJAR_PATCH}; then
		PATCH_TYPE="self_patched"
	fi

	[ -n "${PATCH_TYPE}" ] && return 0 || return 1
}

##########################################################################################
# check if Bromite System WebView is supported
##########################################################################################

check_bromite_webview_support () {
	WEBVIEW_PKG="com.android.webview"
	HAS_WEBVIEW=false

	${AAPT} dump xmltree /system/framework/framework-res.apk res/xml/config_webview_packages.xml | \
		tr -d '\n' | sed -e 's/webviewprovider/\n/g' | grep com.android.webview | \
		grep -q 'E: signature' || HAS_WEBVIEW=true

	${HAS_WEBVIEW} && return 0 || return 1
}

##########################################################################################
# privapp permission whitelist generation
##########################################################################################

dump_system_privapp_permissions () {
	local sys_list="${TMPDIR}/privapp-permissions.list"
	local tmp_list="${TMPDIR}/privapp-permissions.dump"

	rm -f "${sys_list}"

	"${AAPT}" dump xmltree /system/framework/framework-res.apk AndroidManifest.xml | \
		tr -d '\n' | sed -e 's/E:/\n/g' > "${tmp_list}"

	for pattern in	"(type 0x11)0x[1357]2" "(type 0x11)0xc212" \
			"(type 0x11)0x[02]" "(type 0x11)0x[13]02"  \
			"(type 0x11)0x1[01]2" "(type 0x11)0x1001"; do
		grep "${pattern}" "${tmp_list}" | \
		awk -F\" '{print $2}' >> "${sys_list}"
	done

	# XXX pre-patched custom ROM
	check_fake_package_signature && \
		echo "android.permission.FAKE_PACKAGE_SIGNATURE" >> "${sys_list}"
}

create_privapp_permissions_whitelist () {
	local apk="${MODPATH}/system/priv-app/${1}/${1}.apk"
	local apk_name="$("${AAPT}" dump badging "${apk}" | awk -F \' '/^package: name/{print $2}')"
	local apk_list="${TMPDIR}/${apk_name}.list"

	local sys_list="${TMPDIR}/privapp-permissions.list"

	local app_whitelist="${TMPDIR}/${apk_name}.xml"
	local inst_whitelist="/system/etc/permissions/${apk_name}.xml"

	[ ! -f "${sys_list}" ] && dump_system_privapp_permissions

	"${AAPT}" dump permissions "${apk}" | \
		awk -F \' '/^uses-permission:/{print $2}' > "${apk_list}"

	echo '<?xml version="1.0" encoding="utf-8"?>
<permissions>
    <privapp-permissions package="'${apk_name}'">' > "${app_whitelist}"

	cat "${apk_list}" | while read perm; do
		if grep -q "${perm}" "${sys_list}"; then
			decho "  ++ package ${apk_Name} needs privapp-whitelist ${perm}"
			echo '        <permission name="'${perm}'" />' >> "${app_whitelist}"
		fi
	done

	echo '    </privapp-permissions>
</permissions>' >> "${app_whitelist}"

	mkdir -p "${MODPATH}/system/etc/permissions/"
	cp "${app_whitelist}" "${MODPATH}/${inst_whitelist}"
	set_perm_data "${MODPATH}/${inst_whitelist}"
	installinfo_add "${inst_whitelist}"
}

##########################################################################################
# Reset System Runtime permissions
##########################################################################################

reset_runtime_permissions () {
	# required on Android 10, else all apps bundled with NanoDroid will not
	# show a permission prompt for android.permission.WRITE_EXTERNAL_STORAGE
	if [ "${SDK_VERSION}" -ge 29 ]; then
		if ${BOOTMODE}; then
			pm reset-permissions
		else
			find /data/system/users -type f -name 'runtime-permissions.xml' 2>/dev/null | while read file; do
				rm -f "${file}"
				decho "  ++ resetting permissions: ${file}"
			done
		fi
	fi
}

##########################################################################################
# Unpack NanoDroid zip
##########################################################################################

unpack_zip () {
	TMPDIR=/dev/tmp
	TMP_LIBDIR=${TMPDIR}/nanodroid-lib
	INSTALLER=${TMPDIR}/install

	rm -rf ${INSTALLER}
	mkdir -p ${INSTALLER} || error "failed to prepare environment!"

	print_info " > prepare installation"
	unzip -oq "${ZIP}" -d "${INSTALLER}" || \
		error "failed to prepare environment!"

	rm -rf ${TMPDIR}/framework-res
	rm -f ${TMPDIR}/*.xml
	rm -f ${TMPDIR}/*.list

	chmod 0755 ${INSTALLER}/*.*
}

##########################################################################################
# Print NanoDroid banner
##########################################################################################

show_banner () {
	print_info " "
	print_info "*****************************"
	print_info " NanoDroid                   "
	case ${MODID} in
		NanoDroid )
			print_info " > Full package              "
		;;
		NanoDroid_microG )
			print_info " > microG package            "
		;;
		NanoDroid_FDroid )
			print_info " > F-Droid package           "
		;;
		NanoDroid_BromiteWebView )
			print_info " > Bromite WebView package   "
		;;
		NanoDroid_OsmAnd )
			print_info " > OsmAnd package            "
		;;
		NanoDroid_Google )
			print_info " > Google package            "
		;;
	esac

	if [ "${ZIP}" == *${VERSION}* ]; then
		print_info " ${VERSION}                  "
	else
		print_info " ${VERSION} (snapshot)       "
	fi

	print_info "*****************************"
	print_info " "
}

##########################################################################################
# Architecture detection
##########################################################################################

detect_arch () {
	SDK_VERSION=$(grep_prop ro.build.version.sdk)

	ABI=$(grep_prop ro.product.cpu.abi | cut -c-3)
	ABI2=$(grep_prop ro.product.cpu.abi2 | cut -c-3)
	ABILONG=$(grep_prop ro.product.cpu.abi)

	ARCH=arm

	[ "$ABI" = "x86" ] && ARCH=x86
	[ "$ABI2" = "x86" ] && ARCH=x86
	[ "$ABILONG" = "arm64-v8a" ] && ARCH=arm64
	[ "$ABILONG" = "x86_64" ] && ARCH=x86_64

	case ${ARCH} in
		arm )		BIN_ARCH="arm"
				LIB_ARCHES="armeabi-v7a armeabi"
				SWIPE_LIBDIR=lib ;;
		arm64 )		BIN_ARCH="arm"
				LIB_ARCHES="arm64-v8a armeabi-v7a armeabi"
				SWIPE_LIBDIR=lib64 ;;
		x86 )		BIN_ARCH="x86"
				LIB_ARCHES="x86 armeabi-v7a armeabi"
				SWIPE_LIBDIR=lib ;;
		x86_64 )	BIN_ARCH="x86"
				LIB_ARCHES="x86_64 x86 armeabi-v7a armeabi"
				SWIPE_LIBDIR=lib64 ;;
	esac

	UNZIP="${INSTALLER}/unzip.${BIN_ARCH}"
	AAPT="${INSTALLER}/aapt.${BIN_ARCH}"
	ZSTD="${INSTALLER}/zstd.${BIN_ARCH}"
	chmod +x "${UNZIP}" "${AAPT}" "${ZSTD}"

	case ${SDK_VERSION} in
		19 )		GSYNC_VER=K	;;
		21 | 22 )	GSYNC_VER=L	;;
		23 )		GSYNC_VER=M	;;
		24 | 25 )	GSYNC_VER=N	;;
		26 | 27 )	GSYNC_VER=O	;;
		28 )		GSYNC_VER=P	;;
		29 )		GSYNC_VER=Q	;;
		* )	GSYNC_UNSUPPORTED=1	;;
	esac

	case ${ARCH} in
		arm )
			case ${SDK_VERSION} in
				29 )
					LIBJNI_IME=libjni_latinimegoogle.so_28
				;;
				19 | 21 | 22 | 23 | 27 | 28 )
					LIBJNI_IME=libjni_latinimegoogle.so_${SDK_VERSION}
				;;
				24 | 25 | 26 )
					LIBJNI_IME=libjni_latinimegoogle.so_23
				;;
				* )
					SWIPE_UNSUPPORTED=1
				;;
			esac
		;;

		arm64 )
			case ${SDK_VERSION} in
				29 )
					LIBJNI_IME=libjni_latinimegoogle.so_28
				;;
				21 | 22 | 23 | 27 | 28 )
					LIBJNI_IME=libjni_latinimegoogle.so_${SDK_VERSION}
				;;
				24 | 25 | 26 )
					LIBJNI_IME=libjni_latinimegoogle.so_23
				;;
				* )
					SWIPE_UNSUPPORTED=1
				;;
			esac
		;;

		x86 | x86_64 )
			case ${SDK_VERSION} in
				19 | 21 | 22 )
					SWIPE_UNSUPPORTED=1
				;;
				23 | 24 | 25 | 26 | 27 | 28 | 29 )
					LIBJNI_IME=libjni_latinimegoogle.so
				;;
				* )
					SWIPE_UNSUPPORTED=1
				;;
			esac
		;;
	esac

	if [[ "${SDK_VERSION}" -lt 21 ]]; then
		UNFOLD_APP_DIR=1
	else	UNFOLD_APP_DIR=0
	fi

	if [[ "${SDK_VERSION}" -lt 19 ]]; then
		print_info " "
		print_info " ++ Installing on pre-KitKat ROM, full"
		print_info " ++ compatibility is not guaranteed!"
		print_info " "
	fi

	[ ! -d /data/adb ] && mkdir /data/adb
}

##########################################################################################
# Detect and setup installation mode
##########################################################################################

detect_mode () {
	[ -f "${NANODROID_LIST_OLD}" ] && mv "${NANODROID_LIST_OLD}" "${NANODROID_LIST}"

	case "${nanodroid_forcesystem}" in
		1 )
			if ${BOOTMODE}; then
				print_info "nanodroid_forcesystem set to true"
				error "can't install to /system from Magisk Manager"
			fi
			MODE_DETECT=forced
			MODE=SYSTEM
		;;

		0 | *)
			MODE_DETECT=detected
			MODE=SYSTEM
			MAGISK_VER_CODE=0

			if [ ! -f "${NANODROID_LIST}" ]; then
				if [ -f /data/adb/magisk/util_functions.sh ]; then
					. /data/adb/magisk/util_functions.sh
				elif [ -f /data/magisk/util_functions.sh ]; then
					. /data/magisk/util_functions.sh
				fi

				if [ ${MAGISK_VER_CODE} -ge 19000 ]; then
					MODE=MAGISK
				else
					MODE=SYSTEM
				fi
			fi
		;;
	esac

	print_info " > Mode   | ${MODE}            | ${MODE_DETECT}"
	print_info " "

	case ${MODE} in
		SYSTEM )
			installer_setup_env
			unset MODPATH

			mkdir -p /system/addon.d
			[ -f "${NANODROID_LIST}" ] &&  NANODROID_UPGRADE=1
		;;

		MAGISK )
			magisk_install_setup

			case ${MODID} in
				NanoDroid | NanoDroid_microG )
					magisk_install_preinst
				;;
			esac
		;;
	esac

	NANODROID_BINDIR="${MODPATH}/system/bin"
}

##########################################################################################
# Finalize NanoDroid Installation
##########################################################################################

nanodroid_finalize () {
	case ${MODID} in
		NanoDroid | NanoDroid_microG )
			if [ "${nanodroid_overlay}" -eq 1 ]; then
				print_info " << with /system applications overlays"
				${NANODROID_BINDIR}/nanodroid-overlay --create
			else
				print_info " << without /system applications overlays"
			fi
		;;
	esac

	if [ "${MODE}" = "MAGISK" ]; then
		magisk_install_finish
	else
		install_addond
		sync
		nanodroid_storelogs

		sort ${NANODROID_LIST} | uniq > /tmp/nanodroid-list
		mv /tmp/nanodroid-list ${NANODROID_LIST}

		installer_cleanup_env
	fi

	[ "${NANODROID_UPGRADE}" -eq 0 ] && reset_runtime_permissions

	print_info " "
	print_info " Thanks for using NanoDroid "
	print_info " "

	${BOOTMODE} || umount_partitions

	rm -rf ${INSTALLER}
}

##########################################################################################
# Setup Environment
##########################################################################################

##########################################################################################
# Setup Busybox
##########################################################################################

setup_busybox () {
	case $(uname -m) in
		arm* | aarch* )	local bb_arch=arm ;;
		x86* )	local bb_arch=x86 ;;
		*    ) error "arch \"$(uname -m)\" is not supported"
	esac

	mkdir -p ${INSTALLER}/busybox
	ln -s ${INSTALLER}/busybox.${bb_arch} ${INSTALLER}/busybox/busybox

	chmod 0755 ${INSTALLER}/busybox.${bb_arch}
	${INSTALLER}/busybox.${bb_arch} --install -s ${INSTALLER}/busybox/

	OLD_PATH=${PATH}
	export PATH=${INSTALLER}/busybox:/system/bin:/vendor/bin
}

##########################################################################################
# Move envvars out of the way
##########################################################################################
installer_setup_env () {
	if ! ${BOOTMODE}; then
		OLD_PATH=${PATH}
		OLD_LD_LIB=${LD_LIBRARY_PATH}
		OLD_LD_PRE=${LD_PRELOAD}
		OLD_LD_CFG=${LD_CONFIG_FILE}
		unset LD_LIBRARY_PATH
		unset LD_PRELOAD
		unset LD_CONFIG_FILE
	fi
}

##########################################################################################
# Restore envvars
##########################################################################################
installer_cleanup_env () {
	if ${BOOTMODE}; then
		[ -n ${OLD_PATH} ] && PATH=${OLD_PATH}
	else
		[ -n ${OLD_PATH} ] && PATH=${OLD_PATH}
		[ -n ${OLD_LD_LIB} ] && LD_LIBRARY_PATH=${OLD_LD_LIB}
		[ -n ${OLD_LD_PRE} ] && LD_PRELOAD=${OLD_LD_PRE}
		[ -n ${OLD_LD_CFG} ] && LD_CONFIG_FILE=${OLD_LD_CFG}
	fi
}

##########################################################################################
# Magisk Mode Installation
##########################################################################################

##########################################################################################
# Setup Magisk Mode Installation
##########################################################################################

magisk_install_setup () {
	print_info " "
	print_info "******************************"
	print_info "Powered by Magisk (@topjohnwu)"
	print_info "******************************"
	print_info " "
	print_info " > setup Magisk environment"

	MAGISKBASE=/data/adb
	installer_setup_env

	case ${MODID} in
		NanoDroid )
			# check for sub-modules  which are not
			# supposed to be installed alongside
			for dir in NanoDroid_microG NanoDroid_FDroid; do
				if [ -d ${MAGISKBASE}/modules/${dir} ]; then
					print_info " !! ${dir} module detected - uninstalling!"
					rm -rf ${MAGISKBASE}/modules/${dir}
					NANODROID_UPGRADE=1
				fi

				if [ -d ${MAGISKBASE}/modules_update/${dir} ]; then
					print_info " !! ${dir} module detected - uninstalling!"
					rm -rf ${MAGISKBASE}/modules_update/${dir}
				fi
			done
		;;

		NanoDroid_microG | NanoDroid_FDroid )
			# check for Full package and abort if found
			[ -d ${MAGISKBASE}/modules/NanoDroid -o -d ${MAGISKBASE}/modules_update/NanoDroid ] && \
				error "${MODID} can't be installed along side the Full package"
		;;

		NanoDroid_OsmAnd | NanoDroid_Google | NanoDroid_BromiteWebView )
			true
		;;

		* )
			error "unknown module intended to be installed!?"
		;;
	esac

	[ -d ${MODPATH} ] && NANODROID_UPGRADE=1

	if [ "${NANODROID_UPGRADE}" -eq 1 ]; then
		MODPATH=${MAGISKBASE}/modules_update/${MODID}
		rm -rf ${MODPATH}
	else
		MODPATH=${MAGISKBASE}/modules/${MODID}
	fi
}

##########################################################################################
# Magisk Mode Installation: Pre-Installation Tasks
##########################################################################################

magisk_install_preinst () {
	if [ -f ${MODPATH}/system.prop ]; then
		print_info " << backing up module's system.prop"
		cp ${MODPATH}/system.prop ${TMPDIR}/system.prop
	fi

	if [ -d ${MODPATH}/logs ]; then
		print_info " << backing up init.d script logs"
		cp -r ${MODPATH}/logs ${TMPDIR}/logs
	fi

	if [ -d ${MODPATH}/logcats ]; then
		print_info " << backing up logcats"
		cp -r ${MODPATH}/logcats ${TMPDIR}/logcats
	fi
}

##########################################################################################
# Magisk Mode Installation: Post-Installation Tasks
##########################################################################################

magisk_install_postinst () {
	if [ -f ${TMPDIR}/system.prop ]; then
		print_info " << restoring system.prop"
		cp ${TMPDIR}/system.prop ${MODPATH}/system.prop
	fi

	if [ "${nanodroid_microg}" -ne 0 -o "${MODID}" = "NanoDroid_microG" ]; then
		if [ -n $(grep_prop ro.setupwizard.mode) ]; then
			echo "ro.setupwizard.mode=DISABLED" >> ${MODPATH}/system.prop
		fi
	fi

	if [ -d ${TMPDIR}/logs ]; then
		print_info " << restoring init.d script logs"
		cp -r ${TMPDIR}/logs ${MODPATH}/logs
	fi

	if [ -d ${TMPDIR}/logcats ]; then
		print_info " << restoring logcats"
		cp -r ${TMPDIR}/logcats ${MODPATH}/logcats
	fi
}

##########################################################################################
# Finalize Magisk Mode Installation
##########################################################################################

magisk_install_finish () {
	# Magisk Module files
	cp -af ${INSTALLER}/module.prop ${MODPATH}/module.prop

	if [ -f ${INSTALLER}/service.sh ]; then
		cp -af ${INSTALLER}/service.sh ${MODPATH}/service.sh
		chmod +x ${MODPATH}/service.sh
	fi

	case ${MODID} in
		NanoDroid | NanoDroid_microG )
			magisk_install_postinst
		;;
	esac

	if ${BOOTMODE}; then
		touch "${MAGISKBASE}/modules/${MODID}/update" 2>/dev/null
		cp -af "${INSTALLER}/module.prop" "${MAGISKBASE}/modules/${MODID}/module.prop" 2>/dev/null
	fi

	sync
	nanodroid_storelogs
	installer_cleanup_env
}

##########################################################################################
# Generic Installation
##########################################################################################

##########################################################################################
# Install microG
##########################################################################################

install_microg () {
	# install microG if requested
	# respectively force if it's the microG package
	if [ "${nanodroid_microg}" -ne 0 -o "${MODID}" = "NanoDroid_microG" ]; then

		gapps_solve_conflicts
		gapps_destroy_artifacts

		print_info " << with microg"
		print_info "   ++ microG GmsCore"
		nanodroid_install_apk GmsCore
		detect_migrate_apk com.google.android.gms GmsCore

		if [ "${nanodroid_microg}" -ne 2 ]; then
			for app in GsfProxy DroidGuard; do
				nanodroid_install_apk ${app}
			done

			detect_migrate_apk org.microg.gms.droidguard DroidGuard
			${NANODROID_BINDIR}/nanodroid-overlay --add GmsDroidGuard
		fi

		NLPBACKEND="nlpBackendNominatim"
		print_info "   ++ Nominatim geocoder backend"
		${NANODROID_BINDIR}/nanodroid-overlay --add NominatimGeocoderBackend
		${NANODROID_BINDIR}/nanodroid-overlay --add NominatimNlpBackend

		if [ "${nanodroid_nlpbackend:0:1}" -eq 1 ]; then
			NLPBACKEND="${NLPBACKEND} nlpBackendDejavu"
			print_info "   ++ Déjà Vu location backend"
			${NANODROID_BINDIR}/nanodroid-overlay --add DejaVuNlpBackend
			${NANODROID_BINDIR}/nanodroid-overlay --add DejaVuBackend
		fi

		if [ "${nanodroid_nlpbackend:1:1}" -eq 1 ]; then
			NLPBACKEND="${NLPBACKEND} nlpBackendIchnaea"
			print_info "   ++ Ichnaea location backend"
			${NANODROID_BINDIR}/nanodroid-overlay --add IchnaeaNlpBackend
			${NANODROID_BINDIR}/nanodroid-overlay --add MozillaNlpBackend
		fi

		if [ "${nanodroid_nlpbackend:2:1}" -eq 1 ]; then
			NLPBACKEND="${NLPBACKEND} nlpBackendApple"
			print_info "   ++ Apple location backend"
		fi

		if [ "${nanodroid_nlpbackend:3:1}" -eq 1 ]; then
			NLPBACKEND="${NLPBACKEND} nlpBackendRadiocell"
			print_info "   ++ Radiocell location backend"
		fi

		for app in ${NLPBACKEND}; do
			nanodroid_install_apk ${app}
		done

		nanodroid_install_file etc/sysconfig/microg-a5k.xml
		nanodroid_install_file etc/default-permissions/microg-permissions.xml

	else	print_info " << without microG"
	fi
}

##########################################################################################
# Install Maps API v1 support
##########################################################################################

install_mapsv1 () {
	# install mapsv1 if requested
	if [ "${nanodroid_mapsv1}" -eq 1 ]; then
		print_info " << with Maps API version 1"
		nanodroid_install_file etc/permissions/com.google.android.maps.xml
		nanodroid_install_file framework/com.google.android.maps.jar
	else	print_info " << without Maps API version 1"
	fi
}

##########################################################################################
# Install F-Droid
##########################################################################################

install_fdroid () {
	# install F-Droid if requested
	# respectively force if it's the F-Droid package

	if [ "${nanodroid_fdroid}" -eq 3 ]; then
		install_fdroid_fdroid
		install_fdroid_aurora
	elif [ "${nanodroid_fdroid}" -eq 2 ]; then
		install_fdroid_aurora
	elif [ "${nanodroid_fdroid}" -eq 1 -o "${MODID}" = "NanoDroid_FDroid" ]; then
		install_fdroid_fdroid
	else	print_info " << without F-Droid"
	fi
}

install_fdroid_aurora () {
	print_info " << with Aurora Droid"
	nanodroid_install_apk AuroraDroid
	nanodroid_install_apk AuroraServices
}

install_fdroid_fdroid () {
	print_info " << with F-Droid"
	nanodroid_install_apk FDroid
	nanodroid_install_apk FDroidPrivileged

	${NANODROID_BINDIR}/nanodroid-overlay --add FDroidPriv

	nanodroid_install_file etc/org.fdroid.fdroid/additional_repos.xml
}

##########################################################################################
# Install Applications
##########################################################################################

install_apps () {
	# install apps if requested
	if [ "${nanodroid_apps}" -eq 1 ]; then
		print_info " << with applications"
		APP_STRING=" <<>"

		grep -E -v '^(#|[[:space:]]*$)' "${cfg_apps}" | while read app; do
			if [ -d "${INSTALLER}/system/app/${app}" ]; then
				print_info "   ++ ${app}"
				nanodroid_install_apk ${app}
			else	print_info "   ++ app: ${app} missing"
			fi
		done
	else	print_info " << without applications"
	fi
}

##########################################################################################
# Install App Store
##########################################################################################

install_store () {
	STORE_CHOICE=${nanodroid_play:0:1}
	FAKE_STORE=${nanodroid_play:1:1}

	[ "${FAKE_STORE}" -eq 1 ] && STORE_CONFLICT="Phonesky" || STORE_CONFLICT=""

	# install Aurora and/or Play Store whichever requested
	case "${STORE_CHOICE}" in
		1 )
			install_store_play
		;;

		2 )
			install_store_aurora
		;;

		3 )
			install_store_play
			install_store_aurora
		;;

		* )
			print_info " << without App Store"
		;;
	esac

	# Only install Fake Store if requested and Play Store is not installed
	if [ "${FAKE_STORE}" -eq 1 ]; then
		print_info " << with Fake Store"
		nanodroid_install_apk FakeStore
	else 	print_info " << without Fake Store"
	fi

	[ -n "${STORE_CONFLICT}" ] && ${NANODROID_BINDIR}/nanodroid-overlay --add ${STORE_CONFLICT}

	if [ "${NANODROID_UPGRADE}" -eq 0 ]; then
		rm -rf /data/data/com.android.vending
		rm -rf /data/user/*/com.android.vending
		rm -rf /data/user_de/*/com.android.vending
		rm -rf /data/app/com.android.vending-*
	fi
}

install_store_play () {
	# force unselect Fake Store when user has choosen Play Store
	STORE_CONFLICT="FakeStore"
	FAKE_STORE=0

	print_info " << with Play Store"
	${NANODROID_BINDIR}/nanodroid-overlay --remove Phonesky
	nanodroid_install_apk Phonesky

	nanodroid_install_file etc/default-permissions/phonesky-permissions.xml
}

install_store_aurora () {
	print_info " << with Aurora Store"
	nanodroid_install_apk AuroraStore
	nanodroid_install_apk AuroraServices
}

##########################################################################################
# Install GNU Bash
##########################################################################################

install_bash () {
	if [ "${nanodroid_bash}" -eq 1 ]; then
		print_info " << with GNU Bash Shell and Less Pager"
		for file in etc/bash_logout etc/bashrc; do
			nanodroid_install_file ${file}
		done

		for file in  bin/bash bin/bash.bin.${BIN_ARCH} \
			bin/bashbug.${BIN_ARCH} bin/less bin/less.bin.${BIN_ARCH} \
			bin/lessecho.${BIN_ARCH} bin/lesskey.${BIN_ARCH}; do
			nanodroid_install_file ${file} bin
		done
	else	print_info " << without GNU Bash Shell"
	fi
}

##########################################################################################
# Install NanoDroid Scripts
##########################################################################################

install_nanodroidscripts () {
	print_info " << with NanoDroid Scripts"

	for script in npem nutl novl \
		nanodroid-perm nanodroid-util \
		nanodroid-overlay; do
		nanodroid_install_file bin/${script} bin
	done

	nanodroid_substitute bin/nanodroid-overlay

	if [ "${MODE}" = "MAGISK" ]; then
		for script in nprp nanodroid-prop; do
			nanodroid_install_file bin/${script} bin
		done

		nanodroid_substitute bin/nanodroid-prop
	fi
}

##########################################################################################
# Install init scripts
##########################################################################################

install_initd () {
	if [ -n "${nanodroid_init}" ]; then
		print_info " << with init scripts"

		if [ "${MODE}" = "SYSTEM" ]; then
			INIT_BASE="${MODPATH}/system/etc/init.d"
		else	INIT_BASE="${MODPATH}/init.d"
		fi

		mkdir -p "${INIT_BASE}"

		for script in ${nanodroid_init}; do
			if [ -f "${INSTALLER}/system/etc/init.d/${script}" ]; then
				cp "${INSTALLER}/system/etc/init.d/${script}" "${INIT_BASE}/"
				set_perm_bin "${INIT_BASE}/${script}"
				installinfo_add "/system/etc/init.d/${script}"
			else
				ui_print " -- ${script} is not a known init script"
			fi
		done
	else	print_info " << without init scripts"
	fi
}

##########################################################################################
# Install Bromite System WebView
##########################################################################################

install_bromite_webview () {
	if [ "${MODID}" = "NanoDroid_BromiteWebView" ]; then
		if ! check_bromite_webview_support; then
			error "ROM does not support Bromite WebView installation!"
		else
			print_info " << with Bromite WebView"

			case ${ARCH} in
				arm | arm64 | x86 ) BROMITE_ARCH=${ARCH} ;;
				x86_64 ) BROMITE_ARCH=x86 ;;
			esac

			WEBVIEW_REPLACE=BromiteWebView
			WEBVIEW_DIR=""

			for app in webview webviewstub WebViewStub Webview; do
				if [ -d /system/app/${app} ]; then
					WEBVIEW_REPLACE=${app}
					break
				elif [ -d /system/product/app/${app} ]; then
					WEBVIEW_REPLACE=${app}
					WEBVIEW_DIR="product/app"
					break
				fi
			done

			if [ "${NANODROID_UPGRADE}" -eq 0 ]; then
				for app in com.android.webview; do
					rm -rf /data/data/${app}
					rm -rf /data/user/*/${app}
					rm -rf /data/user_de/*/${app}
					rm -rf /data/app/${app}-*
					rm -rf /mnt/asec/${app}-*
					rm -rf ${STORAGE}/Android/data/${app}
				done
			fi

			nanodroid_install_apk BromiteWebView_${BROMITE_ARCH} multilib ${WEBVIEW_REPLACE} ${WEBVIEW_DIR}
		fi
	fi
}

##########################################################################################
# Install OpenStreetMap Android
##########################################################################################

install_osmand () {
	if [ "${MODID}" = "NanoDroid_OsmAnd" ]; then
		print_info " << with OsmAnd"
		nanodroid_install_apk OsmAnd
		nanodroid_install_apk OsmAnd_ContourLines
	fi
}

##########################################################################################
# Install Google Sync Adapters
##########################################################################################

install_gsync () {
	# install GSync if requested
	if [ "${nanodroid_gsync}" -eq 1 ]; then
		if [ "${GSYNC_UNSUPPORTED}" -eq 1 ]; then
			print_info " << Google Sync Adapters are unsupported on SDK ${SDK_VERSION}"
		else
			print_info " << with Google Sync Adapters (${GSYNC_VER})"

			for app in GoogleCalendarSync GoogleContactsSync GoogleBackupTransport; do
				nanodroid_install_apk ${app}
			done

			nanodroid_install_file etc/default-permissions/google-sync-permissions.xml
		fi
	else	print_info " << without Google Sync Adapters"
	fi
}

##########################################################################################
# Install swipe libraries
##########################################################################################

install_swipe () {
	if [ "${nanodroid_swipe}" -eq 1 ]; then
		if [ "${SWIPE_UNSUPPORTED}" -eq 1 ]; then
			print_info " << Swipe Libraries are unsupported on SDK ${SDK_VERSION}"
		else
			print_info " << with swipe libraries"

			SWIPE_SRC="${INSTALLER}/swipe/${ARCH}"
			SWIPE_DEST="/system/${SWIPE_LIBDIR}"

			APPL_IME="/system/app/LatinIME/${SWIPE_LIBDIR}/${ARCH}"
			PRODL_IME="/system/product/app/LatinIME/${SWIPE_LIBDIR}/${ARCH}"

			mkdir -p "${MODPATH}${SWIPE_DEST}"

			cp "${SWIPE_SRC}/libjni_keyboarddecoder.so" "${MODPATH}${SWIPE_DEST}" || \
				error "failed to install libjni_keyboarddecoder.so"
			set_perm_data "${MODPATH}${SWIPE_DEST}/libjni_keyboarddecoder.so"

			cp "${SWIPE_SRC}/${LIBJNI_IME}" "${MODPATH}${SWIPE_DEST}/libjni_latinimegoogle.so" || \
				error "failed to install libjni_latinimegoogle.so"
			set_perm_data "${MODPATH}${SWIPE_DEST}/libjni_latinimegoogle.so"

			installinfo_add "${SWIPE_DEST}/libjni_keyboarddecoder.so"
			installinfo_add "${SWIPE_DEST}/libjni_latinimegoogle.so"

			link_swipe_libs "${APPL_IME}"
			link_swipe_libs "${PRODL_IME}"
		fi
	else	print_info " << without swipe libraries"
	fi
}

link_swipe_libs () {
	DEST_IME=${1}
	if [ -f "${DEST_IME}/libjni_latinime.so" ]; then
		decho " swipe: symlinking libjni_latinimegoogle as libjni_latinime in ${DEST_IME}"

		mkdir -p "${MODPATH}${DEST_IME}"
		ln -sfn "${MODPATH}${SWIPE_DEST}/libjni_latinimegoogle.so" "${MODPATH}${DEST_IME}/libjni_latinime.so"
		ln -sfn "${MODPATH}${SWIPE_DEST}/libjni_keyboarddecoder.so" "${MODPATH}${DEST_IME}/libjni_keyboarddecoder.so"

		installinfo_add "${MODPATH}${DEST_IME}/libjni_latinime.so"
		installinfo_add "${MODPATH}${DEST_IME}/libjni_keyboarddecoder.so"
	elif [ -f "${DEST_IME}/libjni_latinimegoogle.so" ]; then
		decho " swipe: symlinking libjni_latinimegoogle as libjni_latinimegoogle in ${DEST_IME}"

		mkdir -p "${MODPATH}${DEST_IME}"
		ln -sfn "${MODPATH}${SWIPE_DEST}/libjni_latinimegoogle.so" "${MODPATH}${DEST_IME}/libjni_latinimegoogle.so"
		ln -sfn "${MODPATH}${SWIPE_DEST}/libjni_keyboarddecoder.so" "${MODPATH}${DEST_IME}/libjni_keyboarddecoder.so"

		installinfo_add "${MODPATH}${DEST_IME}/libjni_latinimegoogle.so"
		installinfo_add "${MODPATH}${DEST_IME}/libjni_keyboarddecoder.so"
	fi
}

##########################################################################################
# SYSTEM MODE addon.d
##########################################################################################

install_addond () {
	print_info " << 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"
}

##########################################################################################
# Advanced Installation Functions
##########################################################################################

##########################################################################################
# Create Uninstaller / addon.d filelist for SYSTEM MODE
##########################################################################################

installinfo_add () {
	if [ "${MODE}" = "SYSTEM" ]; then
		for file in ${@}; do
			echo ${file} >> ${NANODROID_LIST}
		done
	fi
}

##########################################################################################
# NanoDroid installation function for files
##########################################################################################

nanodroid_install_file () {
	dir="$(dirname "${1}")"
	file="$(basename "${1}")"
	unset source

	for sdir in system gsync; do
		if [ -f "${INSTALLER}/${sdir}/${dir}/${file}" ]; then
			source="${INSTALLER}/${sdir}/${dir}/${file}"
			break
		fi
	done

	[ -z "${source}" ] && error "file: ${file} not found"

	# strip off .${BIN_ARCH} from final filename (if any)
	xfile=$(basename ${file} .${BIN_ARCH})

	decho "    installing file: ${xfile}"

	mkdir -p "${MODPATH}/system/${dir}/"
	cp "${source}" "${MODPATH}/system/${dir}/${xfile}" || \
		error "failed to install ${xfile}"

	case ${2} in
		bin ) set_perm_bin "${MODPATH}/system/${dir}/${xfile}" ;;
		*   ) set_perm_data "${MODPATH}/system/${dir}/${xfile}" ;;
	esac

	installinfo_add "/system/${dir}/${xfile}"
}

##########################################################################################
# NanoDroid installation function for directories
##########################################################################################

nanodroid_install_dir () {
	dir="${1}"
	[ -n "${2}" ] && dest="${2}" || dest="/system/${dir}"

	[ ! -d "${INSTALLER}/system/${dir}" ] && \
		error "dir: ${dir} not found"

	echo "    installing dir: ${dir}"

	mkdir -p "${MODPATH}${dest}"
	cp -r "${INSTALLER}/system/${dir}"/* "${MODPATH}${dest}/" || \
		error "failed to install ${dir}"

	case ${2} in
		bin ) set_perm_bin -r "${MODPATH}${dest}" ;;
		*   ) set_perm_data -r "${MODPATH}${dest}" ;;
	esac

	find "${INSTALLER}/system/${dir}" -type f | \
			sed -e "s,^${INSTALLER},,g" | \
			installinfo_add
}

##########################################################################################
# NanoDroid installation function for APKs
##########################################################################################

nanodroid_install_apk () {
	app=${1}
	multilib=${2}
	alias=${3}

	unset prefix
	unset source

	for sdir in system/app system/priv-app \
		gsync/${GSYNC_VER}/app gsync/${GSYNC_VER}/priv-app; do
		if [ -f "${INSTALLER}/${sdir}/${app}/${app}.apk.zst" ]; then
			source="${INSTALLER}/${sdir}/${app}/${app}.apk"
			dir=system/$(basename ${sdir})
			break
		fi
	done

	[ -n "${4}" ] && dir="system/${4}"

	[ -z "${source}" ] && error "app ${app} not found"

	if [ "${UNFOLD_APP_DIR}" -eq 1 ]; then
		dest="${MODPATH}/${dir}"
	else
		if [ -z "${alias}" ]; then
			dest="${MODPATH}/${dir}/${app}"
		else	dest="${MODPATH}/${dir}/${alias}"
		fi
	fi

	if [ -n "${alias}" ]; then
		dest_apk=${alias}.apk
	else	dest_apk=${app}.apk
	fi

	mkdir -p "${dest}"

	decho "    installing app: ${app}"
	decho "      from: ${source}"
	decho "      into: ${dest} [${dest_apk}]"
	cp "${source}.zst" "${dest}/${dest_apk}.zst" || \
		error "failed to install ${source} to ${dest}"

	${ZSTD} -fd --rm "${dest}/${dest_apk}.zst" || \
		error "failed to decompress ${dest}/${dest_apk}.zst"

	installinfo_add "${dest}/${dest_apk}"

	nanodroid_install_lib "${dest}/${dest_apk}" "${2}"

	[ "${dir}" == "system/priv-app" ] && create_privapp_permissions_whitelist ${app}

	set_perm_data -r "${dest}"
}

##########################################################################################
# NanoDroid installation function for libraries
##########################################################################################

nanodroid_install_lib () {
	apk="${1}"
	dest="$(dirname ${1})"
	multilib="${2}"

	unset libd

	if [ "${UNFOLD_APP_DIR}" -eq 1 ]; then
		case ${ARCH} in
			arm | x86 )      libd=${MODPATH}/system/lib   ;;
			arm64 | x86_64 ) libd=${MODPATH}/system/lib64 ;;
		esac
	else
		libd=${dest}/lib
	fi

	rm -rf ${TMP_LIBDIR}
	mkdir -p ${TMP_LIBDIR}

	unset srcdir

	"${UNZIP}" -oq "${apk}" "lib/*" -d "${TMP_LIBDIR}" \
		2>/dev/null
	unzip_return=$?

	case ${unzip_return} in
		0  ) decho "      ${app} does have libs" ;;
		11 ) decho "      ${app} does not have any libs" ;;
		50 ) error "  not enough space available!" ;;
		*  ) error "  unpacking libs for ${app} failed [${unzip_return}]" ;;
	esac

	if [ -d ${TMP_LIBDIR}/lib ]; then
		for ARCHLIB in ${LIB_ARCHES}; do
			if [ -d ${TMP_LIBDIR}/lib/${ARCHLIB} ]; then
				srcdir=${TMP_LIBDIR}/lib/${ARCHLIB}

				case ${srcdir} in
					*arm64*  ) decho "      ${app}: installing arm64 libs"
						   lib_arch=arm64 ;;
					*arm*	 ) decho "      ${app}: installing arm libs"
						   lib_arch=arm ;;
					*x86_64* ) decho "      ${app}: installing x86_64 libs"
						   lib_arch=x86_64 ;;
					*x86*	 ) decho "      ${app}: installing x86 libs"
						   lib_arch=x86 ;;
				esac

				decho "        from: ${srcdir}"
				decho "        into: ${libd}/${lib_arch}"
				mkdir -p "${libd}/${lib_arch}"

				for lib in ${srcdir}/*; do
					decho "        library: $(basename ${lib})"
					cp ${lib} "${libd}/${lib_arch}/" || \
						error "  installing libs for ${app} failed"

					installinfo_add "${libd}/${lib_arch}/$(basename ${lib})"
				done

				[ -z "${multilib}" ] && break
			fi
		done
	fi
}

##########################################################################################
# substitute values in installed files
##########################################################################################

nanodroid_substitute () {
	dir="$(dirname "${1}")"
	file="$(basename "${1}")"

	target="${MODPATH}/system/${dir}/${file}"

	[ ! -f "${target}" ] && error "file: ${file} not found"

	if grep -q @MODPATH@ ${target}; then
		sed -e "s|@MODPATH@|${MODPATH}|g" -i ${target}
		decho "    substitute: adjust @MODPATH@ in ${target}"
	fi

	if grep -q @MODID@ ${target}; then
		sed -e "s|@MODID@|${MODID}|g" -i ${target}
		decho "    substitute: adjust @MODID@ in ${target}"
	fi

	if grep -q @MODE@ ${target}; then
		sed -e "s|@MODE@|${MODE}|g" -i ${target}
		decho "    substitute: adjust @MODE@ in ${target}"
	fi
}

##########################################################################################
# create installation logs
##########################################################################################

nanodroid_storelogs () {
	mkdir -p "${STORAGE}/nanodroid_logs"

	echo "\

Installation successful: ${INSTALL_SUCCESS}

### VALUES ###
ZIP=${ZIP}
TMPDIR=${TMPDIR}
TMP_LIBDIR=${TMP_LIBDIR}
INSTALLER=${INSTALLER}
MODID=${MODID}
SDK_VERSION=${SDK_VERSION}
ARCH=${ARCH}
LIB_ARCHES=${LIB_ARCHES}
MODPATH=${MODPATH}
SWIPE_LIBDIR=${SWIPE_LIBDIR}
MODE=${MODE}
MAGISK_VER_CODE=${MAGISK_VER_CODE}
NANODROID_UPGRADE=${NANODROID_UPGRADE}
NANODROID_BINDIR=${NANODROID_BINDIR}
HAS_FAKESIGN=${HAS_FAKESIGN}
HAS_WEBVIEW=${HAS_WEBVIEW}

### MOUNTED PARTITIONS ###
" >> ${nanodroid_logfile}

mount | awk '{print $1 " on " $3 " params: " $6}' \
	>> ${nanodroid_logfile}

echo "
### PARTITION INFORMATION ###

DEVICE_AB=${DEVICE_AB}
VENDOR_COMPAT=${VENDOR_COMPAT}
SYSTEM_AS_ROOT=${SYSTEM_AS_ROOT}
SYSTEM_BLOCK=${SYSTEM_BLOCK}
VENDOR_BLOCK=${VENDOR_BLOCK}

### DISK USAGE ###
" >> ${nanodroid_logfile}

df 2>/dev/null | sed '/^\//d' >> ${nanodroid_logfile}

if [ -n "${cfg_setup}" ]; then

echo "
### SETUP ###

configuration: ${cfg_setup}
" >> ${nanodroid_logfile}

cat "${cfg_setup}" >> ${nanodroid_logfile}

fi

if [ -n "${cfg_apps}" ]; then

echo "
### APPS ###

configuration: ${cfg_apps}
" >> ${nanodroid_logfile}

cat "${cfg_apps}" >> ${nanodroid_logfile}

fi

if [ -n "${cfg_overlay}" ]; then

echo "
### OVERLAY ###

configuration: ${cfg_overlay}
" >> ${nanodroid_logfile}

cat "${cfg_overlay}" >> ${nanodroid_logfile}

fi

chown root:sdcard_rw ${nanodroid_logfile}
chmod 0644 ${nanodroid_logfile}

print_info " | storing installation logs in ${STORAGE}/nanodroid_logs/"
print_info " | NanoDroid log:"
print_info " || ""$(basename ${nanodroid_logfile})"

	if [ -d /twres ]; then
		nanodroid_twrplog="${STORAGE}/nanodroid_logs/${MODID}_${VERSION}_twrp_${curdate}.log"

		cat /tmp/recovery.log > ${nanodroid_twrplog}

		chown root:sdcard_rw ${nanodroid_twrplog}
		chmod 0644 ${nanodroid_twrplog}

		print_info " | TWRP log:"
		print_info " || $(basename ${nanodroid_twrplog})"
		print_info " "
	fi

}

##########################################################################################
# NanoDroid Configuration File Handling
##########################################################################################

get_config () {
	config=""
	config_exists=0
	for path in ${config_locations}; do
		if test -r "${path}/.nanodroid-${1}"; then
			config="${path}/.nanodroid-${1}"
			config_exists=1
			return
		fi
	done
}

set_prop () {
	echo "${1}=${2}" >> "${cfg_setup}"
}

##########################################################################################
# Load and verify .nanodroid-setup configuration file
##########################################################################################

get_cfg_setup () {
	get_config setup
	if [ "$config_exists" -eq 1 ]; then
		cfg_setup="${config}"
		check_cfg_setup
		print_info " > Config | nanodroid-setup   | $(dirname ${cfg_setup})"
	else
		cfg_setup="${INSTALLER}/.nanodroid-setup"
		source "${cfg_setup}"
		print_info " > Config | nanodroid-setup   | fallback"
	fi
}

# check whether '.nanodroid-setup' has all required entries
check_cfg_setup () {
	# see https://gitlab.com/Nanolx/NanoDroid/-/issues/147
	dos2unix "${cfg_setup}" &>/dev/null

	source "${cfg_setup}"

	[ -z "${nanodroid_fdroid}" ] && set_prop nanodroid_fdroid 1
	[ -z "${nanodroid_microg}" ] && set_prop nanodroid_microg 1
	[ -z "${nanodroid_apps}" ] && set_prop nanodroid_apps 1
	[ -z "${nanodroid_play}" ] && set_prop nanodroid_play 10

	# in NanoDroid 20.3 nanodroid_play has changed
	if [ "${#nanodroid_play}" -lt 2 ]; then
		case "${nanodroid_play}" in
			0 ) tmp_prop="00" ;;
			1 ) tmp_prop="10" ;;
			2 ) tmp_prop="20" ;;
			3 ) tmp_prop="01" ;;
			4 ) tmp_prop="21" ;;
			* ) tmp_prop="10" ;;
		esac

		sed -e '/^nanodroid_play/d' -i "${cfg_setup}"
		set_prop nanodroid_play "${tmp_prop}"
	fi

	# in NanoDroid 22.5 nanodroid_play has changed
	if [ "${nanodroid_play}" -gt 30 ]; then
		sed -e '/^nanodroid_play/d' -i "${cfg_setup}"
		set_prop nanodroid_play 20
	fi

	if [ "${MODID}" = "NanoDroid" ]; then
		[ -z "${nanodroid_overlay}" ] && set_prop nanodroid_overlay 1
	else	[ -z "${nanodroid_overlay}" ] && set_prop nanodroid_overlay 0
	fi

	[ -z "${nanodroid_mapsv1}" ] && set_prop nanodroid_mapsv1 1
	[ -z "${nanodroid_gsync}" ] && set_prop nanodroid_gsync 0
	[ -z "${nanodroid_forcesystem}" ] && set_prop nanodroid_forcesystem 0
	[ -z "${nanodroid_swipe}" ] && set_prop nanodroid_swipe 0
	[ -z "${nanodroid_bash}" ] && set_prop nanodroid_bash 1
	[ -z "${nanodroid_nlpbackend}" ] && set_prop nanodroid_nlpbackend 1000

	# in NanoDroid 20.3 nanodroid_nlpbackend has changed
	if [ "${#nanodroid_nlpbackend}" -eq 1 ]; then
		case "${nanodroid_nlpbackend}" in
			0 ) tmp_prop="0000" ;;
			1 ) tmp_prop="1000" ;;
			2 ) tmp_prop="0100" ;;
			3 ) tmp_prop="1100" ;;
			* ) tmp_prop="1000" ;;
		esac

		sed -e '/^nanodroid_nlpbackend/d' -i "${cfg_setup}"
		set_prop nanodroid_nlpbackend "${tmp_prop}"
	fi

	# in NanoDroid 20.5 nanodroid_nlpbackend has changed (again)
	if [ "${#nanodroid_nlpbackend}" -eq 3 ]; then
		tmp_prop="${nanodroid_nlpbackend}0"
		sed -e '/^nanodroid_nlpbackend/d' -i "${cfg_setup}"
		set_prop nanodroid_nlpbackend "${tmp_prop}"
	fi

	[ -z "${nanodroid_init+x}" ] && set_prop nanodroid_init "${nanodroid_all_init}"

	# in NanoDroid 22.7 nanodroid_init has changed
	if [ "${#nanodroid_init}" -eq 1 ]; then
		sed -e '/^nanodroid_init/d' -i "${cfg_setup}"
		set_prop nanodroid_init "${nanodroid_all_init}"
	fi

	# in NanoDroid 21.0.90 nanodroid_override was dropped
	sed -e '/^nanodroid_override/d' -i "${cfg_setup}"

	# in NanoDroid 22.5 nanodroid_fonts was dropped
	sed -e '/^nanodroid_fonts/d' -i "${cfg_setup}"

	# in NanoDroid 22.6 nanodroid_nano was dropped
	sed -e '/^nanodroid_nano/d' -i "${cfg_setup}"

	# in NanoDroid 22.6 nanodroid_zelda was dropped
	sed -e '/^nanodroid_zelda/d' -i "${cfg_setup}"

	# in NanoDroid 23.0 nanodroid_utils was dropped
	sed -e '/^nanodroid_uitls/d' -i "${cfg_setup}"

	source "${cfg_setup}"
}

##########################################################################################
# Load and verify .nanodroid-overlay configuration file
##########################################################################################

get_cfg_overlay () {
	get_config overlay
	if [ "$config_exists" -eq 1 ]; then
		cfg_overlay="${config}"
		check_cfg_overlay
		print_info " > Config | nanodroid-overlay | $(dirname ${cfg_overlay})"
	else
		cfg_overlay="${INSTALLER}/.nanodroid-overlay"
		print_info " > Config | nanodroid-overlay | fallback"
	fi
}

# check whether '.nanodroid-overlay' is up to date
check_cfg_overlay () {
	# see https://gitlab.com/Nanolx/NanoDroid/-/issues/147
	dos2unix "${cfg_overlay}" &>/dev/null

	# 22.0 flagged the following for overlay creation which caused issues
	grep -q "^GmsCore$" "${cfg_overlay}" && sed '/^GmsCore$/d' -i "${cfg_overlay}"
	grep -q "^GsfProxy$" "${cfg_overlay}" && sed '/^GsfProxy$/d' -i "${cfg_overlay}"
	grep -q "^DroidGuard$" "${cfg_overlay}" && sed '/^DroidGuard$/d' -i "${cfg_overlay}"
}

##########################################################################################
# Load and verify .nanodroid-apps configuration file
##########################################################################################

get_cfg_apps () {
	get_config apps
	if [ "$config_exists" -eq 1 ]; then
		cfg_apps="${config}"
		check_cfg_apps
		print_info " > Config | nanodroid-apps    | $(dirname ${cfg_apps})"
	else
		cfg_apps="${INSTALLER}/.nanodroid-apps"
		print_info " > Config | nanodroid-apps    | fallback"
	fi
}

# check whether '.nanodroid-apps' is up to date
check_cfg_apps () {
	# see https://gitlab.com/Nanolx/NanoDroid/-/issues/147
	dos2unix "${cfg_apps}" &>/dev/null

	# <= 16.3 has KeePass DX instead of KeePassDroid, migrate
	grep -q KeePassDroid "${cfg_apps}" && sed -e 's/KeePassDroid/KeePassDX/g' -i "${cfg_apps}"

	# <= 17.7 has Substratum instead of Bucket (LibreSubtratum), migrate
	grep -q Bucket "${cfg_apps}" && sed -e 's/Bucket/Substratum/g' -i "${cfg_apps}"

	# <= 18.1 has Orfox instead of TorBrowser, migrate
	grep -q Orfox "${cfg_apps}" && sed -e 's/Orfox/TorBrowser/g' -i "${cfg_apps}"

	# <= 18.4 has Adaway instead of Blockada, migrate
	grep -q Adaway "${cfg_apps}" && sed -e 's/Adaway/Blokada/g' -i "${cfg_apps}"

	# >= 20.7.92 no longer ships YahooWeatherProvider, remove
	grep -q YahooWeatherProvider "${cfg_apps}" && sed -e '/YahooWeatherProvider/d' -i "${cfg_apps}"

	# >= 20.8.90 no longer ships OmniJAWS, remove
	grep -q OmniJAWS "${cfg_apps}" && sed -e '/OmniJAWS/d' -i "${cfg_apps}"

	# >= 21.0.90 has Alarmio instead of OmniClock, migrate
	grep -q OmniClock "${cfg_apps}" && sed -e 's/OmniClock/Alarmio/g' -i "${cfg_apps}"

	# >= 21.0.90 no longer ships OpenWeatherMapProvider, remove
	grep -q OpenWeatherMapProvider "${cfg_apps}" && sed -e '/OpenWeatherMapProvider/d' -i "${cfg_apps}"

	# >= 21.0.90 has Lightning instead of Privacy Browser, migrate
	grep -q Lightning "${cfg_apps}" && sed -e 's/Lightning/PrivacyBrowser/g' -i "${cfg_apps}"

	# >= 21.0.90 has Hacker's Keyboard instead of BeHeKeyboard, migrate
	grep -q BeHeKeyboard "${cfg_apps}" && sed -e 's/BeHeKeyboard/HackersKeyboard/g' -i "${cfg_apps}"

	# >= 22.1 has SmartPack-Kernel-Manager instead of Kernel Adiutor, migrate
	grep -q KernelAdiutor "${cfg_apps}" && sed -e 's/KernelAdiutor/SmartPackKernelManager/g' -i "${cfg_apps}"

	# >= 22.6 has Frost instead of FaceSlim, migrate
	grep -q FaceSlim "${cfg_apps}" && sed -e 's/FaceSlim/Frost/g' -i "${cfg_apps}"

	# >= 22.6 no longer ships Substratum, remove
	grep -q Substratum "${cfg_apps}" && sed -e '/Substratum/d' -i "${cfg_apps}"

	# >= 22.6 no longer ships Orbot, remove
	grep -q Orbot "${cfg_apps}" && sed -e '/Orbot/d' -i "${cfg_apps}"

	# >= 22.7 has OAndBackupX instead of Oandbackup
	grep -q Oandbackup "${cfg_apps}" && sed -e 's/Oandbackup/OAndBackupX/g' -i "${cfg_apps}"

	# >= 23.1 no longer ships XDA Labs, remove
	grep -q XDALabs "${cfg_apps}" && sed -e '/XDALabs/d' -i "${cfg_apps}"

}

##########################################################################################
# Destroy all GApps!
##########################################################################################

gapps_solve_conflicts () {
	# first get rid of conflicting packages
	print_google_apps | while read app; do
		decho " ++ removing app: ${app} [google_apps]"
		${NANODROID_BINDIR}/nanodroid-overlay --add ${app}

		rm -rf /data/dalvik-cache/*/system"@priv-app@${app}"[@\.]*@classes.*
		rm -rf /data/dalvik-cache/*/system"@app@${app}"[@\.]*@classes.*
	done

	print_google_data | while read app; do
		decho " ++ removing data for: ${app} [google_data]"
		rm -rf /data/data/${app}
		rm -rf /data/user/*/${app}
		rm -rf /data/user_de/*/${app}
		rm -rf /data/app/${app}-*
		rm -rf /mnt/asec/${app}-*
		rm -rf ${STORAGE}/Android/data/${app}
	done
}

gapps_destroy_artifacts () {
	# this removes original Play Services
	# only if this is a fresh NanoDroid installation
	if [ "${NANODROID_UPGRADE}" -eq 0 ]; then
		rm -rf /data/dalvik-cache/*/system"@priv-app@GmsCore"[@\.]*@classes.*

		print_google_data_dirty | while read app; do
			decho " ++ removing data for: ${app} [google_data_dirty]"
			rm -rf /data/data/${app}
			rm -rf /data/user/*/${app}
			rm -rf /data/user_de/*/${app}
			rm -rf /data/app/${app}-*
			rm -rf /mnt/asec/${app}-*
			rm -rf ${STORAGE}/Android/data/${app}
		done

		find /data/system* -type f -name 'accounts*db' 2>/dev/null | while read database; do
			decho "  ++ deleting Google Accounts from ${database} (if any)"
			${INSTALLER}/sqlite3.${BIN_ARCH} ${database} \
				"DELETE FROM accounts WHERE type='com.google';"
		done

		find /data/system/users -type f -name 'runtime-permissions.xml' 2>/dev/null | while read file; do
			if grep -q "com.google.android" "${file}"; then
				decho "  ++ resetting permissions: ${file}"
				rm -f "${file}"
			fi
		done

		if [ -f /data/system/packages.list ]; then
			print_google_data_dirty | while read app; do
				decho "  ++ de-registering app: ${app} (if installed)"
				sed -e "/${app}/d" -i /data/system/packages.list
			done
		fi
	fi
}

##########################################################################################
# GApps debloat list
# mostly by @ale5000
# extended for NanoDroid
##########################################################################################

print_google_apps()
{
cat <<EOF
AMAPNetworkLocation
BaiduNetworkLocation
BlankStore
ConfigUpdater
GCS
GmsCoreSetupPrebuilt
GmsCore_update
GoogleFeedback
GoogleLoginService
GoogleOneTimeInitializer
GoogleServicesFramework
GoogleConnectivityServices
GoogleTTS
LegacyNetworkLocation
MarketUpdater
MarkupGoogle
NetworkLocation
Phonesky
PlayGames
PlayStore
PrebuiltGmsCore
PrebuiltGmsCorePi
PrebuiltGmsCorePix
UnifiedNlp
Velvet
Vending
WhisperPush
EOF
}

print_google_data ()
{
cat <<EOF
com.amap.android.location
com.baidu.location
com.google.android.location
org.microg.nlp
org.microg.unifiednlp
EOF
}

print_google_data_dirty ()
{
cat <<EOF
com.android.vending
com.google.android.gms
com.google.android.gsf
com.google.android.gsf.login
com.google.android.feedback
com.mgoogle.android.gms
EOF
}
