#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2016-2020 The Debian Live team
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


set -e

# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh

# Setting static variables
DESCRIPTION="Installs syslinux into binary"
USAGE="${PROGRAM} [--force]"

# Processing arguments and configuration files
Init_config_data "${@}"

Check_Any_Bootloader_Role "syslinux"

Echo_message "Begin installing syslinux..."

# Requiring stage file
Require_stagefile .build/config .build/bootstrap

# Checking stage file
Check_stagefile .build/binary_syslinux

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

# Check architecture
Check_architectures amd64 i386
Check_crossarchitectures

case "${LB_INITRAMFS}" in
	live-boot)
		_INITRAMFS="live"
		;;
	*)
		_INITRAMFS="boot"
		;;
esac

# Assembling image specifics
case "${LIVE_IMAGE_TYPE}" in
	iso*)
		_BOOTLOADER="isolinux"

		case "${LB_MODE}" in
			progress-linux)
				_TARGET="binary/boot"
				;;

			*)
				_TARGET="binary/isolinux"
				;;
		esac
		;;

	netboot)
		_BOOTLOADER="pxelinux"
		_TARGET="tftpboot"
		;;

	hdd*|*)
		case ${LB_BINARY_FILESYSTEM} in
			fat*|ntfs)
				_BOOTLOADER=syslinux

				case "${LB_MODE}" in
					progress-linux)
						_TARGET="binary/boot"
						;;

					*)
						_TARGET="binary/syslinux"
						;;
				esac
				;;

			ext[234]|btrfs)
				_BOOTLOADER=extlinux
				_TARGET="binary/boot/extlinux"
				;;
			*)
				Echo_error "syslinux/extlinux doesn't support ${LB_BINARY_FILESYSTEM}"
				exit 1
				;;
		esac
		;;
esac

if [ -e "config/bootloaders/${_BOOTLOADER}" ]
then
	# Internal local copy
	_SOURCE="config/bootloaders/${_BOOTLOADER}"
else
	# Internal system copy
	if [ -n "${LIVE_BUILD}" ]
	then
		_SOURCE="${LIVE_BUILD}/share/bootloaders/${_BOOTLOADER}"
	else
		_SOURCE="/usr/share/live/build/bootloaders/${_BOOTLOADER}"
	fi
fi

# Checking depends
Check_package chroot /usr/lib/$(echo ${_BOOTLOADER} | tr [a-z] [A-Z]) ${_BOOTLOADER}
Check_package chroot /usr/lib/syslinux syslinux-common

if ls "${_SOURCE}"/*.svg* > /dev/null 2>&1
then
	Check_package chroot /usr/bin/rsvg-convert librsvg2-bin
fi

# Restoring cache
Restore_package_cache binary

# Installing depends
Install_package

# Copying files
case "${LB_BUILD_WITH_CHROOT}" in
	true)
		mkdir -p ${_TARGET}

		# Copy in two steps since the theme can have absolute symlinks and would therefore not be dereferenced correctly
		cp -a ${_SOURCE} chroot/root
		Chroot chroot cp -aL /root/$(basename ${_SOURCE}) /root/$(basename ${_SOURCE}).tmp > /dev/null 2>&1 || true
		cp -a chroot/root/$(basename ${_SOURCE}).tmp/* ${_TARGET}
		rm -rf chroot/root/$(basename ${_SOURCE}) chroot/root/$(basename ${_SOURCE}).tmp
		;;

	false)
		mkdir -p ${_TARGET}

		cp -aL ${_SOURCE}/* ${_TARGET} > /dev/null 2>&1 || true
		;;
esac

# Use correct install menu set
if [ "${LB_DEBIAN_INSTALLER_GUI}" = "true" ]; then
	rm "${_TARGET}"/install_text.cfg
	mv "${_TARGET}"/install_gui.cfg "${_TARGET}"/install.cfg
else
	rm "${_TARGET}"/install_gui.cfg
	mv "${_TARGET}"/install_text.cfg "${_TARGET}"/install.cfg
fi

# Configuring files
if [ -e "${_TARGET}/live.cfg.in" ]
then
	# This is all rather suboptimal.. needs prettifying at some point
	_FLAVOURS="$(echo ${LB_LINUX_FLAVOURS} | wc -w)"

	case "${_FLAVOURS}" in
		1)
			# If multiple initrd images are being generated (by DKMS packages, etc),
			# we likely only want the latest version.
			ln $(ls -r1 --sort=version binary/${_INITRAMFS}/vmlinuz-* | head -n 1) binary/${_INITRAMFS}/vmlinuz
			ln $(ls -r1 --sort=version binary/${_INITRAMFS}/initrd.img-* | head -n 1) binary/${_INITRAMFS}/initrd.img

			sed -e "s|@FLAVOUR@|${LB_LINUX_FLAVOURS}|g" \
			    -e "s|@LINUX@|/${_INITRAMFS}/vmlinuz|g" \
			    -e "s|@INITRD@|/${_INITRAMFS}/initrd.img|g" \
			"${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"

			rm -f "${_TARGET}/live.cfg.in"
			;;

		*)
			_NUMBER="0"

			for _FLAVOUR in ${LB_LINUX_FLAVOURS}
			do
				_NUMBER="$((${_NUMBER} + 1))"

				ln binary/${_INITRAMFS}/vmlinuz-*-${_FLAVOUR} binary/${_INITRAMFS}/vmlinuz${_NUMBER}
				ln binary/${_INITRAMFS}/initrd.img-*-${_FLAVOUR} binary/${_INITRAMFS}/initrd${_NUMBER}.img

				if [ "${_NUMBER}" -gt 1 ]
				then
					echo "" >> "${_TARGET}/live.cfg"
					grep -v 'menu default' "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
				else
					cat "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
				fi

				sed -i -e "s|@FLAVOUR@|${_FLAVOUR}|g" \
				       -e "s|@LINUX@|/${_INITRAMFS}/vmlinuz${_NUMBER}|g" \
				       -e "s|@INITRD@|/${_INITRAMFS}/initrd${_NUMBER}.img|g" \
				"${_TARGET}/live.cfg"
			done

			rm -f "${_TARGET}/live.cfg.in"
			;;
	esac
fi

if [ -e chroot/etc/os-release ]
then
	_VERSION="$(. chroot/etc/os-release && echo ${VERSION_ID})"
fi

_VERSION="${_VERSION:-none}"

_DISTRIBUTION="${LB_DISTRIBUTION_BINARY}"
_ARCHITECTURE="${LB_ARCHITECTURES}"

_DATE=$(date -R)
_YEAR="$(date +%Y)"
_MONTH="$(date +%m)"
_DAY="$(date +%d)"
_HOUR="$(date +%H)"
_MINUTE="$(date +%M)"
_SECOND="$(date +%S)"

_LINUX_VERSIONS="$(for _LINUX in chroot/boot/vmlinuz-* ; do chroot chroot apt-cache policy $(basename ${_LINUX} | sed -e 's|vmlinuz-|linux-image-|') | awk '/Installed: / { print $2 }' ; done | sort -Vru | tr "\n" " ")"

_LIVE_BUILD_VERSION="$(lb --version)"
_LIVE_BOOT_VERSION="$(chroot chroot apt-cache policy live-boot | awk '/Installed: / { print $2 }')"
_LIVE_CONFIG_VERSION="$(chroot chroot apt-cache policy live-config | awk '/Installed: / { print $2 }')"
_LIVE_TOOLS_VERSION="$(chroot chroot apt-cache policy live-tools | awk '/Installed: / { print $2 }')"

case "${LB_MODE}" in
	progress-linux)
		_PROJECT="Progress Linux"
		;;

	*)
		_PROJECT="Debian GNU/Linux"
		;;
esac

for _FILE in "${_TARGET}"/*.cfg ${_TARGET}/*.svg
do
	if [ -e "${_FILE}" ] && [ ! -d "${_FILE}" ]
	then
		sed -i  -e "s#@APPEND_LIVE@#${LB_BOOTAPPEND_LIVE}#g" \
			-e "s#@APPEND_LIVE_FAILSAFE@#${LB_BOOTAPPEND_LIVE_FAILSAFE}#g" \
			-e "s#@APPEND_INSTALL@#${LB_BOOTAPPEND_INSTALL}#g" \
			-e "s#@APPEND_INSTALL_FAILSAFE@#${LB_BOOTAPPEND_INSTALL_FAILSAFE}#g" \
			-e "s|@PROJECT@|${_PROJECT}|g" \
			-e "s|@DISTRIBUTION@|${_DISTRIBUTION}|g" \
			-e "s|@PARENT_DISTRIBUTION@|${LB_PARENT_DISTRIBUTION_BINARY}|g" \
			-e "s|@VERSION@|${_VERSION}|g" \
			-e "s|@ARCHITECTURE@|${_ARCHITECTURE}|g" \
			-e "s|@DATE@|${_DATE}|g" \
			-e "s|@YEAR@|${_YEAR}|g" \
			-e "s|@MONTH@|${_MONTH}|g" \
			-e "s|@DAY@|${_DAY}|g" \
			-e "s|@HOUR@|${_HOUR}|g" \
			-e "s|@MINUTE@|${_MINUTE}|g" \
			-e "s|@SECOND@|${_SECOND}|g" \
			-e "s|@LINUX_VERSIONS@|${_LINUX_VERSIONS}|g" \
			-e "s|@LIVE_BUILD_VERSION@|${_LIVE_BUILD_VERSION}|g" \
			-e "s|@LIVE_BOOT_VERSION@|${_LIVE_BOOT_VERSION}|g" \
			-e "s|@LIVE_CONFIG_VERSION@|${_LIVE_CONFIG_VERSION}|g" \
			-e "s|@LIVE_TOOLS_VERSION@|${_LIVE_TOOLS_VERSION}|g" \
		"${_FILE}"
	fi
done

if [ -e "${_TARGET}/splash.svg" ]
then
	case "${LB_BUILD_WITH_CHROOT}" in
		true)
			cp "${_TARGET}/splash.svg" chroot
			Chroot chroot "rsvg-convert --format png --height 480 --width 640 splash.svg -o splash.png"
			mv chroot/splash.png "${_TARGET}"
			rm -f chroot/splash.svg
			;;

		false)
			rsvg-convert --format png --height 480 --width 640 "${_TARGET}/splash.svg" -o "${_TARGET}/splash.png"
			;;
	esac

	rm -f "${_TARGET}/splash.svg"
fi

# Tweak the grub theme to reuse the syslinux background image
if [ -e binary/boot/grub/live-theme/theme.txt ]; then
	sed -i -e 's|^desktop-image:.*|desktop-image: "/isolinux/splash.png"|' \
	-e 's|^title-text:.*|title-text: ""|' \
	binary/boot/grub/live-theme/theme.txt
fi

case "${LB_MODE}" in
	progress-linux)
		for _FILE in "${_TARGET}/isolinux.bin" "${_TARGET}/isolinux.cfg" "${_TARGET}/syslinux.cfg"
		do
			if [ -e "${_FILE}" ]
			then
				mv "${_FILE}" "${_TARGET}/$(echo ${_FILE} | sed -e 's|.*linux|boot|')"
			fi
		done
		;;
esac

case "${LB_BUILD_WITH_CHROOT}" in
	true)
		# Saving cache
		Save_package_cache binary

		# Removing depends
		Remove_package
		;;
esac

# Creating stage file
Create_stagefile .build/binary_syslinux