#! /bin/bash
set -e
set -o pipefail

export LC_ALL=C

. "${LB_BASE:-/usr/share/live/build}"/scripts/build.sh

Arguments "${@}"

Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

(
	if [ -d gnupg ]; then
		cat << @@EOF > gnupg/NEWKEY
Key-Type: DSA
Key-Length: 1024
Name-Real: Ubuntu Local Archive One-Time Signing Key
Name-Email: cdimage@ubuntu.com
Expire-Date: 0
@@EOF
		gpg --home gnupg --gen-key --batch < gnupg/NEWKEY \
			> gnupg/generate.log 2>&1 &
		GPG_PROCESS=$!
	fi

	lb bootstrap "$@"
	lb chroot "$@"

	if [ -d chroot/var/lib/preinstalled-pool ]; then
		(cd chroot/var/lib/preinstalled-pool/ && apt-ftparchive packages . > Packages)
		bzip2 -9 -c chroot/var/lib/preinstalled-pool/Packages \
			> chroot/var/lib/preinstalled-pool/Packages.bz2
		cat << @@EOF > chroot/etc/apt/sources.list.preinstall
# This is a sources.list entry for a small pool of packages
# provided on your preinstalled filesystem for your convenience.
#
# It is perfectly safe to delete both this entry and the directory
# it references, should you want to save disk space and fetch the
# packages remotely instead.
#
deb file:/var/lib/preinstalled-pool/ ./
#
@@EOF

		cat chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list \
			> chroot/etc/apt/sources.list.new
		mv chroot/etc/apt/sources.list.new chroot/etc/apt/sources.list
		rm chroot/etc/apt/sources.list.preinstall

		echo "Waiting on gnupg ("$GPG_PROCESS") to finish generating a key."
		wait $GPG_PROCESS

		R_ORIGIN=$(lsb_release -i -s)
		R_CODENAME=$(lsb_release -c -s)
		R_VERSION=$(lsb_release -r -s)
		R_PRETTYNAME=$(echo $R_CODENAME | sed -e 's/^\(.\)/\U\1/')

		apt-ftparchive -o APT::FTPArchive::Release::Origin=$R_ORIGIN \
			-o APT::FTPArchive::Release::Label=$R_ORIGIN \
			-o APT::FTPArchive::Release::Suite=$R_CODENAME-local \
			-o APT::FTPArchive::Release::Version=$R_VERSION \
			-o APT::FTPArchive::Release::Codename=$R_CODENAME \
			-o APT::FTPArchive::Release::Description="$R_ORIGIN $R_PRETTYNAME Local" \
			release chroot/var/lib/preinstalled-pool/ > gnupg/Release

		gpg --home gnupg --detach-sign --armor gnupg/Release
		mv gnupg/Release chroot/var/lib/preinstalled-pool/Release
		mv gnupg/Release.asc chroot/var/lib/preinstalled-pool/Release.gpg
		apt-key --keyring chroot/etc/apt/trusted.gpg add gnupg/pubring.gpg
		rm chroot/var/lib/preinstalled-pool/Packages
	fi

	echo "===== Checking size of /usr/share/doc ====="
	echo BEGIN docdirs
	(cd chroot && find usr/share/doc -maxdepth 1 -type d | xargs du -s | sort -nr)
	echo END docdirs

	if which fdupes >/dev/null 2>&1; then
		echo "===== Checking for duplicate files ====="
		echo "first line: <total size for dupes> <different dupes> <all dupes>"
		echo "data lines: <size for dupes> <number of dupes> <file size> <filename> [<filename> ...]"
		echo BEGIN fdupes
		(cd chroot \
		   && fdupes --recurse --noempty --sameline --size --quiet usr \
		   | awk '/bytes each/ {s=$1} /^usr/ { n+=1; n2+=NF-1; sum+=s*(NF-1); print s*(NF-1), NF-1, s, $0 } END {print sum, n, n2}' \
		   | sort -nr
		)
		echo END fdupes
	fi

	lb binary "$@"
) 2>&1 | tee binary.log

# Link output files somewhere BuildLiveCD will be able to find them.
PREFIX="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"

case $LB_INITRAMFS in
	casper)
		INITFS="casper"
		;;

	live-boot)
		INITFS="live"
		;;

	*)
		INITFS="boot"
		;;
esac

for OUTPUT in ext2 ext3 ext4 manifest manifest-remove size squashfs; do
	[ -e "binary/$INITFS/filesystem.$OUTPUT" ] || continue
	ln "binary/$INITFS/filesystem.$OUTPUT" "$PREFIX.$OUTPUT"
	chmod 644 "$PREFIX.$OUTPUT"
done

if [ -e "binary/$INITFS/filesystem.dir" ]; then
	(cd "binary/$INITFS/filesystem.dir/" && tar -c *) | \
		gzip -9 --rsyncable > "$PREFIX.rootfs.tar.gz"
	chmod 644 "$PREFIX.rootfs.tar.gz"
fi

# '--initramfs none' produces different manifest names.
if [ -e "binary/$INITFS/filesystem.packages" ]; then
	ln "binary/$INITFS/filesystem.packages" "$PREFIX.manifest"
	chmod 644 "$PREFIX.manifest"
fi
if [ -e "binary/$INITFS/filesystem.packages-remove" ]; then
	# Not a typo, empty manifest-remove has a single LF in it. :/
	if [ $(cat binary/$INITFS/filesystem.packages-remove | wc -c) -gt 1 ]; then
		ln "binary/$INITFS/filesystem.packages-remove" "$PREFIX.manifest-remove"
		chmod 644 "$PREFIX.manifest-remove"
	fi
fi

for FLAVOUR in $LB_LINUX_FLAVOURS; do
	if [ -z "$LB_LINUX_FLAVOURS" ] || [ "$LB_LINUX_FLAVOURS" = "none" ]; then
		continue
	fi
	KVERS="$( (cd "binary/$INITFS"; ls vmlinu?-*) | sed -n "s/^vmlinu.-\\([^-]*-[^-]*-$FLAVOUR\\)$/\\1/p" )"
	if [ -z "$KVERS" ]; then
		echo "No kernel output for $FLAVOUR!" >&2
		exit 1
	fi
	NUMKVERS="$(set -- $KVERS; echo $#)"
	if [ "$NUMKVERS" -gt 1 ]; then
		echo "Cannot handle more than one kernel for $FLAVOUR ($KVERS)!" >&2
		exit 1
	fi
	ln "binary/$INITFS/"vmlinu?-"$KVERS" "$PREFIX.kernel-$FLAVOUR"
	chmod 644 "$PREFIX.kernel-$FLAVOUR"
	if [ -e "binary/$INITFS/initrd.img-$KVERS" ]; then
		ln "binary/$INITFS/initrd.img-$KVERS" "$PREFIX.initrd-$FLAVOUR"
		chmod 644 "$PREFIX.initrd-$FLAVOUR"
	fi
done

NUMFLAVOURS="$(set -- $LB_LINUX_FLAVOURS; echo $#)"
if [ "$NUMFLAVOURS" = 1 ] && [ "$LB_LINUX_FLAVOURS" != "none" ]; then
	# only one kernel flavour
	ln -sf "$PREFIX.kernel-$LB_LINUX_FLAVOURS" "$PREFIX.kernel"
	ln -sf "$PREFIX.initrd-$LB_LINUX_FLAVOURS" "$PREFIX.initrd"
fi

if [ "$SUBARCH" = "ac100" ]; then
	# create the md5sum file for which we are actually doing all this
	md5sum $PREFIX.rootfs.tar.gz >chroot/installer.md5

	# make sure update-initramfs feels cosy and warm in the environment
	lb chroot_proc install "$@"
	lb chroot_sysfs install "$@"
	lb chroot_devpts install "$@"

	# re-create initrd to contain the installer.md5 file
	Chroot chroot "update-initramfs -k all -t -u -v"

	# create boot.img
	Chroot chroot "abootimg --create /boot/installer-${KVERS}.img -f /boot/bootimg.cfg -r /boot/initrd.img-${KVERS} -k /boot/vmlinu?-${KVERS}"

	# clean up
	lb chroot_devpts remove "$@"
	lb chroot_sysfs remove "$@"
	lb chroot_proc remove "$@"

	cp "chroot/boot/installer-${KVERS}.img" "$PREFIX.installer-$FLAVOUR.img"
fi

# LTSP chroot building (only in 32bit and for Edubuntu (DVD))
case $PROJECT in
	edubuntu-dvd)
		if [ "$ARCH" = i386 ]; then
			echo "Building LTSP chroot"
			ltsp-build-client --base $(pwd) --mirror $LB_PARENT_MIRROR_BOOTSTRAP --arch $ARCH --dist $LB_PARENT_DISTRIBUTION --chroot ltsp-live --late-packages ldm-edubuntu-theme,plymouth-theme-edubuntu --purge-chroot --skipimage
			mkdir -p images
			mksquashfs ltsp-live images/ltsp-live.img -noF -noD -noI -no-exports -e cdrom
			rm -Rf ltsp-live
			if [ -f images/ltsp-live.img ]; then
				mv images/ltsp-live.img livecd.$PROJECT-ltsp.squashfs
				chmod 0644 livecd.$PROJECT-ltsp.squashfs
				rmdir --ignore-fail-on-non-empty images
			else
				echo "LTSP: Unable to build the chroot, see above for details."
			fi
		fi
		;;
esac