log (){
	date +"[%T] $*" | tee -a "${LOG_FILE}"
}
export -f log

bootstrap(){
	local BOOTSTRAP_CMD=debootstrap
	local BOOTSTRAP_ARGS=()

	#export http_proxy=${APT_PROXY}

	# qemu-debootstrap is deprecated. Please use regular debootstrap directly
	#
	# if [ "$(dpkg --print-architecture)" !=  "armhf" ] && [ "$(dpkg --print-architecture)" !=  "arm64" ]; then
	#	 BOOTSTRAP_CMD=qemu-debootstrap
	# fi

	BOOTSTRAP_ARGS+=(--arch ${TARGET_ARCH})
	BOOTSTRAP_ARGS+=(--include gnupg)
	BOOTSTRAP_ARGS+=(--components "main,contrib,non-free")
	if [ "${USE_RASPI_SOURCE}" = "1" ]; then
		BOOTSTRAP_ARGS+=(--keyring "${STAGE_DIR}/files/raspberrypi.gpg")
	fi
	BOOTSTRAP_ARGS+=("$@")
	printf -v BOOTSTRAP_STR '%q ' "${BOOTSTRAP_ARGS[@]}"

	capsh --drop=cap_setfcap -- -c "'${BOOTSTRAP_CMD}' $BOOTSTRAP_STR" || true

	if [ -d "$2/debootstrap" ] && ! rmdir "$2/debootstrap"; then
		cp "$2/debootstrap/debootstrap.log" "${STAGE_WORK_DIR}"
		log "bootstrap failed: please check ${STAGE_WORK_DIR}/debootstrap.log"
		return 1
	fi
}
export -f bootstrap

copy_previous(){
	if [ ! -d "${PREV_ROOTFS_DIR}" ]; then
		echo "Previous stage rootfs not found"
		false
	fi
	mkdir -p "${ROOTFS_DIR}"
	rsync -aHAXx --exclude var/cache/apt/archives "${PREV_ROOTFS_DIR}/" "${ROOTFS_DIR}/"
}
export -f copy_previous

unmount(){
	if [ -z "$1" ]; then
		DIR=$PWD
	else
		DIR=$1
	fi

	while mount | grep -q "$DIR"; do
		local LOCS
		LOCS=$(mount | grep "$DIR" | cut -f 3 -d ' ' | sort -r)
		for loc in $LOCS; do
			umount "$loc"
		done
	done
}
export -f unmount

unmount_image(){
	sync
	sleep 1
	local LOOP_DEVICES
	LOOP_DEVICES=$(losetup --list | grep "$(basename "${1}")" | cut -f1 -d' ')
	for LOOP_DEV in ${LOOP_DEVICES}; do
		if [ -n "${LOOP_DEV}" ]; then
			local MOUNTED_DIR
			MOUNTED_DIR=$(mount | grep "$(basename "${LOOP_DEV}")" | head -n 1 | cut -f 3 -d ' ')
			if [ -n "${MOUNTED_DIR}" ] && [ "${MOUNTED_DIR}" != "/" ]; then
				unmount "$(dirname "${MOUNTED_DIR}")"
			fi
			sleep 1
			losetup -d "${LOOP_DEV}"
		fi
	done
}
export -f unmount_image

on_chroot() {
	if ! mount | grep -q "$(realpath "${ROOTFS_DIR}"/proc)"; then
		mount -t proc proc "${ROOTFS_DIR}/proc"
	fi

	if ! mount | grep -q "$(realpath "${ROOTFS_DIR}"/dev)"; then
		mount --bind /dev "${ROOTFS_DIR}/dev"
	fi
	
	if ! mount | grep -q "$(realpath "${ROOTFS_DIR}"/dev/pts)"; then
		mount --bind /dev/pts "${ROOTFS_DIR}/dev/pts"
	fi

	if ! mount | grep -q "$(realpath "${ROOTFS_DIR}"/sys)"; then
		mount --bind /sys "${ROOTFS_DIR}/sys"
	fi

    # run as root 'dpkg-reconfigure locales' enable 'en_US.UTF-8'
    # perhaps run as root 'update-locale LC_MEASUREMENT=en_US.UTF-8 LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8'
    export LC_MEASUREMENT=en_US.UTF-8
    export LC_ALL=en_US.UTF-8
    export LANG=en_US.UTF-8

	setarch linux32 capsh --drop=cap_setfcap "--chroot=${ROOTFS_DIR}/" -- -e "$@"
}
export -f on_chroot

print_issue() {
    echo "GNU/Linux ${IMG_DATE} UTC"
    if [ -n "${CUSTOM_NAME}" -a -n "${CUSTOM_VERSION}" ]; then
        echo "${CUSTOM_NAME} version ${CUSTOM_VERSION}"
    fi
    echo "Generated using ${PI_GEN}, ${PI_GEN_REPO}, ${GIT_HASH}, ${1}"

    if [ -f "$ROOTFS_DIR/usr/share/doc/raspberrypi-kernel/changelog.Debian.gz" ]; then
        firmware=$(zgrep "firmware as of" \
            "$ROOTFS_DIR/usr/share/doc/raspberrypi-kernel/changelog.Debian.gz" | \
            head -n1 | sed  -n 's|.* \([^ ]*\)$|\1|p')
        printf "\nFirmware: https://github.com/raspberrypi/firmware/tree/%s\n" "$firmware"

        kernel="$(curl -s -L "https://github.com/raspberrypi/firmware/raw/$firmware/extra/git_hash")"
        printf "Kernel: https://github.com/raspberrypi/linux/tree/%s\n" "$kernel"

        uname="$(curl -s -L "https://github.com/raspberrypi/firmware/raw/$firmware/extra/uname_string7")"
        printf "Uname string: %s\n" "$uname"
    fi

    printf "\nPackages:\n"
    dpkg -l --root "$ROOTFS_DIR"
}
export -f print_issue