#! /bin/sh
set -e

export LC_ALL=C

( . "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || true ) || . /usr/lib/live/build.sh

Arguments "${@}"

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

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

	lb bootstrap "$@"

	Chroot chroot "dpkg-divert --quiet --add \
		--divert /usr/sbin/update-initramfs.REAL --rename \
		/usr/sbin/update-initramfs"
	cat > chroot/usr/sbin/update-initramfs <<'EOF'
#! /bin/sh
if [ $# != 1 ] || [ "$1" != -u ]; then
	exec update-initramfs.REAL "$@"
fi
echo "update-initramfs: diverted by livecd-rootfs (will be called later)" >&2
exit 0
EOF
	chmod +x chroot/usr/sbin/update-initramfs

	cat > config/hooks/999-undivert-update-initramfs.chroot <<'EOF'
#! /bin/sh
rm -f /usr/sbin/update-initramfs
dpkg-divert --quiet --remove --rename /usr/sbin/update-initramfs
EOF

	lb chroot "$@"

	if [ -f config/oem-config-preinstalled ]; then

# This is cargo-culted almost verbatim (with some syntax changes for
# preinstalled being slightly different in what it doesn't ask) from
# debian-installer's apt-setup:

codename=$LB_DISTRIBUTION
file="chroot/etc/apt/sources.list"
dists="main"
alldists="main"
if echo "$LB_PARENT_ARCHIVE_AREAS" | grep -q restricted; then
	dists="$dists restricted"
	alldists="$alldists restricted"
fi
if echo "$LB_PARENT_ARCHIVE_AREAS" | grep -q universe; then
	UNIVERSE=true
else
	UNIVERSE=false
fi
if echo "$LB_PARENT_ARCHIVE_AREAS" | grep -q multiverse; then
	MULTIVERSE=true
else
	MULTIVERSE=false
fi

cat > $file <<EOF
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb $LB_PARENT_MIRROR_BINARY $codename $dists
deb-src $LB_PARENT_MIRROR_BINARY $codename $dists

## Major bug fix updates produced after the final release of the
## distribution.
deb $LB_PARENT_MIRROR_BINARY $codename-updates $dists
deb-src $LB_PARENT_MIRROR_BINARY $codename-updates $dists
EOF

# Even if universe isn't enabled, we write example lines for it.
echo >> $file
if [ "$UNIVERSE" = true ]; then
	alldists="$alldists universe"
	COMMENT=
else
	cat >> $file <<EOF
## Uncomment the following two lines to add software from the 'universe'
## repository.
EOF
	COMMENT='# '
fi
cat >> $file <<EOF
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
${COMMENT}deb $LB_PARENT_MIRROR_BINARY $codename universe
${COMMENT}deb-src $LB_PARENT_MIRROR_BINARY $codename universe
${COMMENT}deb $LB_PARENT_MIRROR_BINARY $codename-updates universe
${COMMENT}deb-src $LB_PARENT_MIRROR_BINARY $codename-updates universe
EOF

# Multiverse is different, don't write anything unless enabled.
if [ "$MULTIVERSE" = true ]; then
	alldists="$alldists multiverse"
	cat >> $file <<EOF

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb $LB_PARENT_MIRROR_BINARY $codename multiverse
deb-src $LB_PARENT_MIRROR_BINARY $codename multiverse
deb $LB_PARENT_MIRROR_BINARY $codename-updates multiverse
deb-src $LB_PARENT_MIRROR_BINARY $codename-updates multiverse
EOF
fi

cat >> $file <<EOF

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb $LB_PARENT_MIRROR_BINARY $codename-backports $alldists
# deb-src $LB_PARENT_MIRROR_BINARY $codename-backports $alldists
EOF

cat >> $file <<EOF

deb $LB_PARENT_MIRROR_BINARY $codename-security $dists
deb-src $LB_PARENT_MIRROR_BINARY $codename-security $dists
EOF

# Security sources for Ubuntu universe; not used much, but e.g. unsupported
# binary packages from a supported source package will end up here.
if [ "$UNIVERSE" = true ]; then
        COMMENT=
else
        COMMENT='# '
fi
cat >> $file <<EOF
${COMMENT}deb $LB_PARENT_MIRROR_BINARY $codename-security universe
${COMMENT}deb-src $LB_PARENT_MIRROR_BINARY $codename-security universe
EOF

# Security sources for Ubuntu multiverse, with the same caveats as for
# universe.
if [ "$MULTIVERSE" = true ]; then
        COMMENT=
else
        COMMENT='# '
fi
cat >> $file <<EOF
${COMMENT}deb $LB_PARENT_MIRROR_BINARY $codename-security multiverse
${COMMENT}deb-src $LB_PARENT_MIRROR_BINARY $codename-security multiverse
EOF

	fi
	if [ -d chroot/var/lib/preinstalled-pool ]; then
		cat > config/indices/apt.conf <<-EOF
Dir {
 ArchiveDir "chroot/var/lib/preinstalled-pool";
 OverrideDir "config/indices";
 CacheDir "config/indices";
}
Default { Packages::Compress ". bzip2"; }
TreeDefault { Directory "pool"; }
Tree "dists/$LB_DISTRIBUTION"
{
 Sections "$LB_PARENT_ARCHIVE_AREAS";
 Architectures "$LB_ARCHITECTURES";
 BinOverride "override.$LB_DISTRIBUTION.\$(SECTION)";
 ExtraOverride "override.$LB_DISTRIBUTION.extra.\$(SECTION)";
 Contents " ";
}
EOF
		for component in $LB_PARENT_ARCHIVE_AREAS; do
			mkdir -p chroot/var/lib/preinstalled-pool/dists/$LB_DISTRIBUTION/$component/binary-$LB_ARCHITECTURES
		done
		apt-ftparchive generate config/indices/apt.conf
		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/ $LB_DISTRIBUTION $LB_PARENT_ARCHIVE_AREAS
#
@@EOF

		cp chroot/etc/apt/sources.list chroot/etc/apt/sources.list.orig
		cp chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list

		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 $R_PRETTYNAME Local" \
			release chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/ \
				> config/gnupg/Release

		gpg --home config/gnupg --detach-sign --armor config/gnupg/Release
		mv config/gnupg/Release \
			chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/Release
		mv config/gnupg/Release.asc \
			chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/Release.gpg
		apt-key --keyring chroot/etc/apt/trusted.gpg add config/gnupg/pubring.gpg
		find chroot/var/lib/preinstalled-pool/ -name Packages | xargs rm

		Chroot chroot "apt-get update"
		cat chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list.orig \
			> chroot/etc/apt/sources.list
		rm chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list.orig
	fi
	if [ "$PROJECT" = "ubuntu-touch" ] && [ "$ARCH" = "armhf" ]; then
		INFO_DESC="$(lsb_release -d -s)"

		mkdir -p chroot/var/log/installer
		echo "$INFO_DESC - $ARCH ($BUILDSTAMP)" >chroot/var/log/installer/media-info
	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 "$@"
	touch binary.success
) 2>&1 | tee binary.log

# bash has trouble with the build.sh sourcing arrangement at the top of this
# file, so we use this cheap-and-cheerful approach rather than the more
# correct 'set -o pipefail'.
if [ -e binary.success ]; then
	rm -f binary.success
else
	exit 1
fi

# 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

for ISO in binary.iso binary.hybrid.iso; do
	[ -e "$ISO" ] || continue
	ln "$ISO" "$PREFIX.iso"
	chmod 644 "$PREFIX.iso"
	break
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"
elif [ -e binary-tar.tar.gz ]; then
	cp -a binary-tar.tar.gz "$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/$INITFS"; ls vmlinu?-* 2>/dev/null || true) | (fgrep -v .efi || true) | sed -n "s/^vmlinu.-\\([^-]*-[^-]*-$FLAVOUR\\)$/\\1/p" )"
	if [ -z "$KVERS" ]; then
		if [ -e "binary/$INITFS/vmlinuz" ]; then
			# already renamed by ubuntu-defaults-image
			break
		fi
		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"
	if [ -e "binary/$INITFS/"vmlinu?-"$KVERS.efi.signed" ]; then
		ln "binary/$INITFS/"vmlinu?-"$KVERS.efi.signed" "$PREFIX.kernel-$FLAVOUR.efi.signed"
		chmod 644 "$PREFIX.kernel-$FLAVOUR.efi.signed"
	fi
	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 ] && [ "$LB_LINUX_FLAVOURS" != "none" ]; then
	# only one kernel flavour
	if [ -e "binary/$INITFS/vmlinuz" ]; then
		ln "binary/$INITFS/vmlinuz" "$PREFIX.kernel"
	else
		ln -sf "$PREFIX.kernel-$LB_LINUX_FLAVOURS" "$PREFIX.kernel"
	fi
	if [ -e "binary/$INITFS/initrd.lz" ]; then
		ln "binary/$INITFS/initrd.lz" "$PREFIX.initrd"
	else
		ln -sf "$PREFIX.initrd-$LB_LINUX_FLAVOURS" "$PREFIX.initrd"
	fi
fi

if [ "$SUBARCH" = "ac100" ] || [ "$SUBARCH" = "nexus7" ]; then
	# create the md5sum and size files for which we are actually doing all this
	md5sum $PREFIX.rootfs.tar.gz >chroot/installer.md5
	wc -c $PREFIX.rootfs.tar.gz >chroot/installer.size

	INFO_DESC="$(lsb_release -d -s)"
	INFO_STAMP=$(date +20%y%m%d-%H:%M)

	echo "$INFO_DESC - $ARCH ($INFO_STAMP)" >chroot/media-info

	# 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 "env FLASH_KERNEL_SKIP=1 update-initramfs -k all -t -u -v"

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

	if [ "$SUBARCH" = "nexus7" ]; then
		# roll the android rootfs images
		mkdir -p userdata
		mv $PREFIX.rootfs.tar.gz userdata/rootfs.tar.gz
		make_ext4fs -l 6G -s $PREFIX.ext4-$FLAVOUR userdata/
		mv userdata/rootfs.tar.gz $PREFIX.rootfs.tar.gz
		ln -sf "$PREFIX.ext4-$FLAVOUR" "$PREFIX.ext4"
	fi

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

	cp "chroot/boot/installer-${KVERS}.img" "$PREFIX.bootimg-$FLAVOUR"
	ln -sf "$PREFIX.bootimg-$FLAVOUR" "$PREFIX.bootimg"

fi

if [ "$PROJECT" = "ubuntu-touch" ] && [ "$ARCH" = "armhf" ]; then
	touchsubarches="maguro manta grouper mako"

	sourceslist="chroot/etc/apt/sources.list"

	lb chroot_proc install "$@"
	lb chroot_sysfs install "$@"
	lb chroot_devpts install "$@"

	if [ -e chroot/etc/resolv.conf ]; then
		mv chroot/etc/resolv.conf chroot/etc/resolv.conf.orig
	fi
	if [ -e /etc/resolv.conf ]; then
		cp /etc/resolv.conf chroot/etc/resolv.conf
	fi

	mv "${sourceslist}" "${sourceslist}.orig"
	mv "${sourceslist}.d" "${sourceslist}.d.orig"
	echo "deb ${MIRROR} saucy main universe multiverse restricted" >$sourceslist
	Chroot chroot "apt-get -y update"
	Chroot chroot "apt-get -y install android"

	REL="$LB_DISTRIBUTION"
	for subarch in $touchsubarches; do
		cp "chroot/usr/share/android/product/${REL}-preinstalled-system-armel+${subarch}.img"\
			 "${PREFIX}.system-armel+${subarch}.img"
		cp "chroot/usr/share/android/product/${REL}-preinstalled-recovery-armel+${subarch}.img"\
			 "${PREFIX}.recovery-armel+${subarch}.img"
		cp "chroot/usr/share/android/product/${REL}-preinstalled-boot-armhf+${subarch}.img"\
			 "${PREFIX}.boot-armhf+${subarch}.img"
		# drop this following line once cdimage can handle -boot-*.img
		ln -s "${PREFIX}.boot-armhf+${subarch}.img" "${PREFIX}.bootimg-${subarch}" 
		cp "chroot/usr/share/android/product/${REL}-preinstalled-touch-armel+${subarch}.zip"\
			 "${PREFIX}.armel+${subarch}.zip"
	done

	lb chroot_devpts remove "$@"
	lb chroot_sysfs remove "$@"
	lb chroot_proc remove "$@"
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 $LB_PARENT_DISTRIBUTION --chroot ltsp-live --late-packages ldm-edubuntu-theme,plymouth-theme-edubuntu --purge-chroot --skipimage
			mkdir -p images
			mksquashfs ltsp-live images/ltsp-live.img -e cdrom
			rm -Rf ltsp-live
			if [ -f images/ltsp-live.img ]; then
				mv images/ltsp-live.img livecd.$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