#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2013 Daniel Baumann <daniel@debian.org>
##
## 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="$(Echo 'bootstrap a Debian system with cdebootstrap(1)')"
HELP=""
USAGE="${PROGRAM} [--force]"

Arguments "${@}"

# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

if [ "${LB_BOOTSTRAP}" != "cdebootstrap" ] && [ "${LB_BOOTSTRAP}" != "cdebootstrap-static" ]
then
	exit 0
fi

if [ ! -x "$(which cdebootstrap 2>/dev/null)" ]
then
	echo "E: cdebootstrap - command not found"
	echo "I: cdebootstrap can be obtained from http://ftp.debian.org/debian/pool/main/d/cdebootstrap/"
	echo "I: On Debian based systems, cdebootstrap can be installed with 'apt-get install cdebootstrap'."
	exit 1
fi

# Check architecture
Check_crossarchitectures

Echo_message "Begin bootstrapping system..."

Check_package /usr/bin/${LB_BOOTSTRAP} cdebootstrap

# Ensure that a system is built as root
lb testroot

# Checking stage file
Check_stagefile .build/bootstrap
Check_stagefile .build/bootstrap_cache.restore

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

# Creating chroot directory
mkdir -p chroot

# Setting cdebootstrap options
if [ -n "${LB_ARCHITECTURES}" ]
then
	CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --arch=${LB_ARCHITECTURES}"
fi

if [ "${_DEBUG}" = "true" ]
then
	CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --debug"
fi

if [ "${_QUIET}" = "true" ]
then
	CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --quiet"
fi

if [ "${_VERBOSE}" = "true" ]
then
	CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --verbose"
fi

if [ "${LB_APT_SECURE}" = "false" ]
then
	CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --allow-unauthenticated"
fi

if [ -x "/usr/bin/cdebootstrap" ] || [ -x "/usr/bin/cdebootstrap-static" ]
then
	if [ "${LB_CACHE_PACKAGES}" = "true" ]
	then
		if ls cache/packages.bootstrap/*.deb > /dev/null 2>&1
		then
			mkdir -p chroot/var/cache/bootstrap
			cp cache/packages.bootstrap/*.deb chroot/var/cache/bootstrap
		fi

		Echo_breakage "Running ${LB_BOOTSTRAP} (download-only)... "
		${LB_ROOT_COMMAND} ${LB_BOOTSTRAP} ${CDEBOOTSTRAP_OPTIONS} --download-only "${LB_PARENT_DISTRIBUTION}" chroot "${LB_PARENT_MIRROR_BOOTSTRAP}"

		if [ -n "${LB_ROOT_COMMAND}" ]
		then
			${LB_ROOT_COMMAND} chown -R $(whoami):$(whoami) chroot
		fi

		# Removing old cache
		rm -f cache/packages.bootstrap/*.deb

		# Saving new cache
		mkdir -p cache/packages.bootstrap
		cp chroot/var/cache/bootstrap/*.deb cache/packages.bootstrap
	fi

	Echo_breakage "Running ${LB_BOOTSTRAP}... "

	# Run appropriate bootstrap, i.e. foreign or regular bootstrap
	if [ "${LB_BOOTSTRAP_QEMU_ARCHITECTURES}" = "${LB_ARCHITECTURES}" ]; then

		if [ -n "${LB_BOOTSTRAP_QEMU_EXCLUDE}" ]
		then
			CDEBOOTSTRAP_OPTIONS="${CDEBOOTSTRAP_OPTIONS} --exclude=$(echo ${LB_BOOTSTRAP_QEMU_EXCLUDE} | sed 's|  *|,|g')"
		fi

		Echo_message "Bootstrap will be foreign"
		${LB_ROOT_COMMAND} ${LB_BOOTSTRAP} ${CDEBOOTSTRAP_OPTIONS} --foreign "${LB_PARENT_DISTRIBUTION}" chroot "${LB_PARENT_MIRROR_BOOTSTRAP}"

		Echo_message "Running debootstrap second stage under QEMU"
		cp ${LB_BOOTSTRAP_QEMU_STATIC} chroot/usr/bin
		Chroot chroot /bin/sh /sbin/cdebootstrap-foreign
	else
		${LB_ROOT_COMMAND} ${LB_BOOTSTRAP} ${CDEBOOTSTRAP_OPTIONS} "${LB_PARENT_DISTRIBUTION}" chroot "${LB_PARENT_MIRROR_BOOTSTRAP}"
	fi

	if [ -n "${LB_ROOT_COMMAND}" ]
	then
		${LB_ROOT_COMMAND} chown -R $(whoami):$(whoami) chroot
	fi

	# Deconfiguring cdebootstrap configurations
	rm -f chroot/etc/apt/sources.list
	rm -f chroot/etc/hosts
	rm -f chroot/etc/resolv.conf

	# Removing bootstrap cache
	rm -rf chroot/var/cache/bootstrap

	# Creating stage file
	Create_stagefile .build/bootstrap
else
	Echo_error "Can't process file /usr/bin/${LB_BOOTSTRAP} (FIXME)"
	exit 1
fi