#! /bin/sh
set -e

rm -rf config

echo "Building on $(hostname --fqdn)"

SEEDMIRROR=http://people.canonical.com/~ubuntu-archive/seeds/
if [ -z "$MIRROR" ]; then
	case $(hostname --fqdn) in
		bld-*.mmjgroup.com)	;;
		*.mmjgroup.com)
			case $ARCH in
				i386|amd64)	MIRROR=http://archive.mmjgroup.com/ubuntu/ ;;
				*)		MIRROR=http://archive.mmjgroup.com/ubuntu-ports/ ;;
			esac
			;;
		*.0c3.net)
			case $ARCH in
				i386|amd64)	MIRROR=http://mirrors.0c3.net/ubuntu/ ;;
				*)		MIRROR=http://mirrors.0c3.net/ubuntu-ports/ ;;
			esac
			;;
		*.ubuntu.com)		MIRROR=http://ftpmaster.internal/ubuntu/
					SEEDMIRROR=http://archive-team.internal/seeds/
					;;
		*.warthogs.hbd.com)	MIRROR=http://ftpmaster.internal/ubuntu/
					SEEDMIRROR=http://archive-team.internal/seeds/
					;;
		*.buildd)		MIRROR=http://ftpmaster.internal/ubuntu/
					SEEDMIRROR=http://archive-team.internal/seeds/
					;;
	esac
fi

mkdir -p config/package-lists

add_task ()
{
	local pass="$1"
	shift
	local task

	# The removal of direct task installation support from live-build
	# poses some problems.  If the chroot has multiarch configured - for
	# example, if we're building for amd64 - then dumpavail will show
	# foreign-architecture packages which will have their own Task
	# lines, but which we don't want to install.  (Compare
	# PackageContainerInterface::FromTask in apt, which restricts task
	# expansion to the native architecture.)  We therefore restrict our
	# search to stanzas with Architecture: $ARCH or all.
	#
	# However, even this may not be accurate enough.  At the moment I
	# have no idea what happens if an Architecture: all package has
	# different Task fields on different architectures.  This is
	# probably a lurking timebomb that we need to fix.  In the meantime,
	# the Architecture restriction at least saves us from abject
	# failure.

	for task; do
		# We need a ridiculous number of backslashes to protect
		# parentheses from eval.
		echo "!chroot chroot apt-cache dumpavail | grep-dctrl -nsPackage \\\\\\( -XFArchitecture $ARCH -o -XFArchitecture all \\\\\\) -a -wFTask $task" >> "config/package-lists/livecd-rootfs.list.chroot_$pass"
	done
}

add_package ()
{
	local pass="$1"
	shift
	local pkg

	for pkg; do
		echo "$pkg" >> "config/package-lists/livecd-rootfs.list.chroot_$pass"
	done
}

OPTS=
COMPONENTS=
BINARY_REMOVE_LINUX=:
BINARY_IMAGES=none
MEMTEST=none
SOURCE='--source false'
BOOTLOADER=none
BOOTAPPEND_LIVE=
LIVE_TASK=
PREINSTALLED=false
PREINSTALL_POOL=
PREINSTALL_POOL_SEEDS=

CHROOT_HOOKS=
BINARY_HOOKS=

add_chroot_hook ()
{
	CHROOT_HOOKS="${CHROOT_HOOKS:+$CHROOT_HOOKS }$1"
}

add_binary_hook ()
{
	BINARY_HOOKS="${BINARY_HOOKS:+$BINARY_HOOKS }$1"
}

case $IMAGEFORMAT in
	ext2|ext3|ext4)
		OPTS="${OPTS:+$OPTS }--initramfs none --chroot-filesystem $IMAGEFORMAT"
		PREINSTALLED=true
		case $SUBPROJECT in
			wubi)
				add_package install lupin-support
				COMPONENTS='main restricted universe multiverse'
				;;
			*)
				add_package live jasper
				OPTS="${OPTS:+$OPTS }--swap-file-path SWAP.swap"
				OPTS="${OPTS:+$OPTS }--swap-file-size 512"
				;;
		esac
		;;

	plain)
		OPTS="${OPTS:+$OPTS }--initramfs none --chroot-filesystem $IMAGEFORMAT"
		PREINSTALLED=true
		;;

	*)
		case $PROJECT in
			ubuntu-server|ubuntu-touch)
				;;
			*)
				add_package live lupin-casper
				;;
		esac
		;;
esac

if [ "$PREINSTALLED" = "true" ] && [ "$SUBPROJECT" != "wubi" ]; then
	# This is an oem-config preinstalled image, touch a random file that
	# we can refer back to during build, cause that's wildly hackish
	touch config/oem-config-preinstalled
	case $PROJECT in
		kubuntu*)
			add_package live oem-config-kde ubiquity-frontend-kde
			add_package live ubiquity-slideshow-kubuntu
			;;
		lubuntu*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-lubuntu
			;;
		xubuntu*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-xubuntu
			;;
		ubuntu-server)
			add_package live oem-config-debconf ubiquity-frontend-debconf
			;;
		ubuntu-core|base|ubuntu-touch)
			;;
		*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-ubuntu
			;;
	esac
fi

case $BINARYFORMAT in
	iso*|usb*)
		BINARY_IMAGES="$BINARYFORMAT"
		MEMTEST=memtest86+
		BOOTLOADER=syslinux
		OPTS="${OPTS:+$OPTS }--zsync=false"
		;;
esac

case $PROJECT in
	ubuntu|ubuntu-dvd)
		add_task install minimal standard
		case "$ARCH+$SUBARCH" in
			armhf+omap4)
				# Don't use the task as this drags in the regular X
				# stack (the metapackage doesn't). We want the
				# "reverted" one.
				add_package install ubuntu-desktop \
					xserver-xorg-core-omap-revert \
					xserver-xorg-video-omap-revert \
					xserver-xorg-input-evdev-omap-revert 
				;;
			*)
				add_task install ubuntu-desktop
				;;
		esac
		LIVE_TASK='ubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		;;

	kubuntu|kubuntu-dvd)
		add_task install minimal standard
		case "$ARCH+$SUBARCH" in
			armhf+omap4)
				# Don't use the task as this drags in the regular X
				# stack (the metapackage doesn't). We want the
				# "reverted" one.
				add_package install kubuntu-desktop \
					xserver-xorg-core-omap-revert \
					xserver-xorg-video-omap-revert \
					xserver-xorg-input-evdev-omap-revert 
				;;
			*)
				add_task install kubuntu-desktop
				;;
		esac
		LIVE_TASK='kubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe'
		add_chroot_hook remove-gnome-icon-cache
		;;

	kubuntu-active)
		add_task install minimal standard kubuntu-active
		LIVE_TASK='kubuntu-active-live'
		COMPONENTS='main restricted universe'
		add_chroot_hook remove-gnome-icon-cache
		;;

	edubuntu|edubuntu-dvd)
		add_task install minimal standard ubuntu-desktop edubuntu-desktop-gnome
		LIVE_TASK='edubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe'
		;;

	xubuntu)
		add_task install minimal standard xubuntu-desktop
		add_package install xterm
		LIVE_TASK='xubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe multiverse'
		case $ARCH in
			amd64|i386)	KERNEL_FLAVOURS=generic ;;
		esac
		;;

	ubuntu-netbook)
		add_task install minimal standard ubuntu-netbook
		LIVE_TASK='netbook-live'
		;;

	mythbuntu)
		add_task install minimal standard mythbuntu-desktop
		LIVE_TASK='mythbuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe multiverse'
		;;

	lubuntu)
		add_task install minimal standard lubuntu-desktop
		LIVE_TASK='lubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe multiverse'
		case $ARCH in
			amd64|i386)	KERNEL_FLAVOURS=generic ;;
		esac

		# The Lubuntu STRUCTURE file has "feature
		# no-follow-recommends".  Mirror this.
		export APT_OPTIONS="--yes --no-install-recommends"
		;;

	ubuntu-gnome)
		add_task install minimal standard ubuntu-gnome-desktop
		LIVE_TASK='ubuntu-gnome-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe'
		;;

	ubuntustudio-dvd)
		add_task install minimal standard ubuntustudio-desktop ubuntustudio-audio ubuntustudio-font-meta ubuntustudio-graphics ubuntustudio-video ubuntustudio-publishing ubuntustudio-photography
		COMPONENTS='main restricted universe multiverse'
		case $ARCH in
			amd64|i386)	KERNEL_FLAVOURS=lowlatency ;;
		esac
		;;

	ubuntukylin)
		add_task install minimal standard ubuntu-desktop
		add_package install ubuntukylin-default-settings
		LIVE_TASK='ubuntu-live'
		case $ARCH in
			amd64)	add_package live linux-signed-generic ;;
		esac
		COMPONENTS='main restricted universe'
		;;

	base)
		add_task install minimal standard
		;;

	ubuntu-server)
		add_task install minimal
		COMPONENTS='main'
		PREINSTALL_POOL_SEEDS='server-ship'
		;;

	ubuntu-core)
		add_task install minimal
		OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"
		;;

	ubuntu-touch)
		add_package install ubuntu-minimal ubuntu-touch
		COMPONENTS='main restricted universe'
		BOOTAPPEND_LIVE='hostname=ubuntu-phablet username=ubuntu'
		export LB_BOOTSTRAP_INCLUDE='apt-transport-https gnupg'
		OPTS="${OPTS:+$OPTS }--apt-recommends false"
		OPTS="${OPTS:+$OPTS }--compression gzip"
		OPTS="${OPTS:+$OPTS }--swap-file-path SWAP.swap"
		OPTS="${OPTS:+$OPTS }--swap-file-size 100"
		OPTS="${OPTS:+$OPTS }--system normal"
		OPTS="${OPTS:+$OPTS }--zsync false"
		;;

	*)
		echo "unknown project $PROJECT" >&2
		exit 2
		;;
esac

if [ "$PREINSTALLED" != "true" ] && [ "$LIVE_TASK" ]; then
	add_task live "$LIVE_TASK"
fi

case $PROJECT in
	ubuntu-dvd)
		add_task install ubuntu-usb
		add_task live ubuntu-usb-live
		;;

	*-dvd)
		add_task live "$PROJECT-live"
		;;
esac

case $ARCH in
	armel|armhf)
		KERNEL_FLAVOURS="${SUBARCH:-$KERNEL_FLAVOURS}"
		case $SUBARCH in
			dove)
				BINARY_REMOVE_LINUX=false
				;;
			omap)
				add_package install u-boot-linaro-omap3-beagle u-boot-tools
				BINARY_REMOVE_LINUX=false
				;;
			omap4)
				case $PROJECT in
					ubuntu-server|ubuntu-core|base)
						add_package install u-boot-linaro-omap4-panda u-boot-tools
						;;
					*)
						add_package install u-boot-linaro-omap4-panda u-boot-tools pvr-omap4
						;;
				esac
				BINARY_REMOVE_LINUX=false
				;;
			mx5)
				COMPONENTS='main restricted universe'
				KERNEL_FLAVOURS=linaro-lt-mx5
				add_package install flash-kernel u-boot-linaro-mx53loco u-boot-tools
				BINARY_REMOVE_LINUX=false
				;;
			ac100)
				COMPONENTS='main restricted universe multiverse'
				add_package install zram-config abootimg
				add_package live ac100-tarball-installer
				BINARY_REMOVE_LINUX=false
				;;
			nexus7)
				COMPONENTS='main restricted universe multiverse'
				add_package install zram-config abootimg 
				add_package install nvidia-tegra3 ubuntu-defaults-nexus7
				add_package live ac100-tarball-installer
				BINARY_REMOVE_LINUX=false
				mkdir -p config/preseed
				echo "linux-firmware-nexus7 shared/nexus7_notice_accepted boolean true" >config/preseed/linux-firmware-nexus7.preseed.chroot
				echo "d-i passwd/auto-login boolean true" >config/preseed/autologin.preseed.chroot
				;;
		esac
		;;
esac

case $PROJECT in
	ubuntu-server|ubuntu-core|ubuntu-touch)
		OPTS="${OPTS:+$OPTS }--linux-packages=none --initramfs=none"
		KERNEL_FLAVOURS=none
		BINARY_REMOVE_LINUX=false
		;;
esac

add_chroot_hook update-apt-file-cache
add_chroot_hook update-apt-xapian-index
add_chroot_hook update-mlocate-database
add_chroot_hook remove-dbus-machine-id
add_chroot_hook remove-openssh-server-host-keys
add_chroot_hook remove-udev-persistent-rules

case $PROJECT in
	ubuntu-server)
		;;

	*)
		add_chroot_hook remove-python-py
		;;
esac

case $SUBPROJECT in
	wubi)
		add_binary_hook build-wubildr
		;;
esac

lb config noauto \
	--mode ubuntu \
	--distribution "$SUITE" \
	--bootstrap-keyring ubuntu-keyring \
	--binary-images "$BINARY_IMAGES" \
	--memtest "$MEMTEST" \
	$SOURCE \
	--build-with-chroot false \
	${MIRROR:+--parent-mirror-bootstrap $MIRROR} \
	${COMPONENTS:+--parent-archive-areas "$COMPONENTS"} \
	--apt-source-archives false \
	${KERNEL_FLAVOURS:+--linux-flavours "$KERNEL_FLAVOURS"} \
	--initsystem none \
	--bootloader "$BOOTLOADER" \
	--initramfs-compression lzma \
	${BOOTAPPEND_LIVE:+--bootappend-live "$BOOTAPPEND_LIVE"} \
	$OPTS

echo "LB_CHROOT_HOOKS=\"$CHROOT_HOOKS\"" >> config/chroot
echo "LB_BINARY_HOOKS=\"$BINARY_HOOKS\"" >> config/binary
echo "BUILDSTAMP=\"$NOW\"" >> config/binary

case $PROJECT in
	ubuntu-server)
		cat > config/hooks/100-remove-fstab.chroot <<EOF
#! /bin/sh
rm -f /etc/fstab
EOF
		;;

	ubuntukylin)
		cat > config/hooks/100-ubuntukylin.chroot <<EOF
#! /bin/sh
set -e
HOOK=/usr/share/ubuntukylin-default-settings/hooks/chroot
if [ -x \$HOOK ]; then
	exec \$HOOK
fi
exit 0
EOF
		;;
esac

if $BINARY_REMOVE_LINUX; then
	cat > config/binary_rootfs/excludes << EOF
boot/vmlinu?-*
boot/initrd.img-*
EOF
fi

if [ "$PROPOSED" ]; then
	. config/bootstrap

	cat > config/archives/proposed.list.chroot << EOF
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-proposed $LB_PARENT_ARCHIVE_AREAS
EOF
	cp -a config/archives/proposed.list.chroot \
	      config/archives/proposed.list.binary
fi

case $PROJECT in
	*-dvd)
		. config/bootstrap

		cat > config/archives/dvd.list.binary << EOF
deb $LB_PARENT_MIRROR_BINARY $SUITE universe multiverse
deb $LB_PARENT_MIRROR_BINARY_SECURITY $SUITE-security universe multiverse
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-updates universe multiverse
EOF
		if [ "$PROPOSED" ]; then
			cat >> config/archives/dvd.list.binary << EOF
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-proposed universe multiverse
EOF
		fi
		;;

	ubuntu-touch)
		cp -af /usr/share/livecd-rootfs/live-build/ubuntu-touch/* \
			config/
		;;
esac

# cribbed from cdimage, perhaps this should be a small helper script in germinate?
add_inheritance () {
	case " $inherit " in
		*" $1 "*)
			;;
		*)
			inherit="${inherit:+$inherit }$1"
			;;
	esac
}

expand_inheritance () {
	for seed in $(grep "^$1:" config/germinate-output/structure | cut -d: -f2); do
		expand_inheritance "$seed"
	done
	add_inheritance "$1"
}

inheritance () {
	inherit=
	expand_inheritance "$1"
	echo "$inherit"
}

if [ "$PREINSTALLED" = "true" ]; then
	if [ -n "$PREINSTALL_POOL_SEEDS" ]; then
		mkdir -p config/germinate-output
		case $PROJECT in
			kubuntu-active*)
				SEED=kubuntu-active.$SUITE
				;;
			kubuntu*)
				SEED=kubuntu.$SUITE
				;;
			xubuntu*)
				SEED=xubuntu.$SUITE
				;;
			*)
				SEED=ubuntu.$SUITE
				;;
		esac
		(cd config/germinate-output && germinate --no-rdepends --no-installer \
			-S $SEEDMIRROR -m $MIRROR -d $SUITE -s $SEED \
			${COMPONENTS:+-c "$COMPONENTS"} -a $ARCH)

		UNWANTED_SEEDS="${LIVE_TASK:+$LIVE_TASK }boot installer required"
		for i in $UNWANTED_SEEDS; do
			UNWANTED_SEEDS="${UNWANTED_SEEDS:+$UNWANTED_SEEDS }$(inheritance $i)"
		done

		for i in $PREINSTALL_POOL_SEEDS; do
			PREINSTALL_POOL_SEEDS="${PREINSTALL_POOL_SEEDS:+$PREINSTALL_POOL_SEEDS }$(inheritance $i)"
		done

		for i in $PREINSTALL_POOL_SEEDS; do
			case " $UNWANTED_SEEDS " in
				*" $i "*)
					;;
				*)
					PPS_EXP="${PPS_EXP:+$PPS_EXP }$i"
					;;
			esac
		done

		for i in $PPS_EXP; do
			PREINSTALL_POOL="$PREINSTALL_POOL $(awk '{print $1}' \
			config/germinate-output/$i | egrep -v '^-|^Package|^\|' | tr '\n' ' ')"
		done
	fi
	if [ -n "$PREINSTALL_POOL" ]; then
		mkdir -p config/gnupg
		mkdir -p config/indices
		for component in $COMPONENTS; do
			(cd config/indices && \
		 	 wget $MIRROR/indices/override.$SUITE.$component && \
			 wget $MIRROR/indices/override.$SUITE.extra.$component \
			)
		done
		cat > config/hooks/100-preinstall-pool.chroot <<EOF
#! /bin/sh
mkdir -p /var/lib/preinstalled-pool/pool/
cd /var/lib/preinstalled-pool/pool/
apt-get -y download $PREINSTALL_POOL
EOF
	fi
fi