#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2014 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.

# Including common functions
. /usr/lib/live/build.sh

# Reading defaults
if [ -r /etc/default/live-build-cgi ]
then
	. /etc/default/live-build-cgi
else
	echo "E: /etc/default/live-build-cgi missing"
	exit 1
fi

# Exit if disabled
if [ "${_WEBBUILD}" != "true" ]
then
	exit 0
fi

_HOSTNAME="$(hostname -f)"

# Turn on debug if true
if [ "${_DEBUG}" = "true" ]
then
	set -x
fi

# Locknum sets the lock enumeration for multiple instances of l-b-cgi
_LOCKNUM="$(expr 1 + $(expr $(date +%M) % ${_INSTANCES}))"

# Checking lock file
if [ -f /var/lock/live-build-cgi-${_LOCKNUM}.lock ]
then
	echo "E: live-build-cgi instance ${_LOCKNUM} already/still running."
	exit 1
fi

# Creating lock trap
trap "test -f /var/lock/live-build-cgi-${_LOCKNUM}.lock && rm -f /var/lock/live-build-cgi-${_LOCKNUM}.lock; exit 0" 0 1 2 3 9 15

# Creating lock file
touch /var/lock/live-build-cgi-${_LOCKNUM}.lock

# Cleanup old builds: cron should be run at least once per hour to take effect
if ls "${_DESTDIR}"/`date -d yesterday +%Y%m%d.%H`* > /dev/null 2>&1
then
	rm -rf "${_DESTDIR}"/`date -d yesterday +%Y%m%d.%H`*

	echo "`date +%b\ %d\ %H:%M:%S` ${_HOSTNAME} live-build-cgi: remove web build (`date -d yesterday +%Y%m%d.%H`*)." >> /var/log/live/live-build
fi

# Ok from here spin through the live-build-cgi files we have waiting to build
#if ls "${_TEMPDIR}"/*.build > /dev/null 2>&1
if Find_files ${_TEMPDIR}/*.build
then
	_FILE=$(ls "${_TEMPDIR}"/*.build | sort | head -1)
	# Pull in variables from the build file.
	. "${_FILE}"

	# Drop out some build data for information if something goes wrong.
	echo "`date +%b\ %d\ %H:%M:%S` ${_HOSTNAME} live-build-cgi: begin web build (${_BUILD})." >> /var/log/live/live-build

	# Clone the git config to target build directory
	git clone ${_LB_GIT} "${_TEMPDIR}"/"${_BUILD}" >> /var/log/live/live-build
	_ERRORGIT="${?}"

	# Moving build file to the tempdir and remove from submission area.
	mv "${_TEMPDIR}"/"${_BUILD}".build "${_TEMPDIR}"/"${_BUILD}"/

	# Sanity check to default to something since we are going to build from git clone.
	if [ -z "${_LB_CONFIG}" ]
	then
		_LB_CONFIG="standard"
	fi

	# Now set a variable for the correct build path
	_BUILD_PATH="${_TEMPDIR}/${_BUILD}/images/${_LB_CONFIG}"

	_DATE_START="`date -R`"
	echo "Begin live-build-cgi: ${_DATE_START}" > "${_BUILD_PATH}"/log
	echo "Info live-build-cgi: Config tree cloned from ${_LB_GIT} for build ${_BUILD}" >> "${_BUILD_PATH}"/log

	# Creating directory for the config/package-lists
	mkdir -p "${_BUILD_PATH}"/config/package-lists

	# Add cgipackages.list.chroot
	if [ -n "${_LB_CGIPACKAGES}" ]
	then
		echo "${_LB_CGIPACKAGES}" > "${_BUILD_PATH}"/config/package-lists/cgipackages.list.chroot
	fi

	# Generating config here
	if [ "${_ERRORGIT}" -eq "0" ]
	then
		cd "${_BUILD_PATH}"
		# Do config with git and stack on config file params to build
		lb config ${_CGI_CONFIG_APPEND} --apt "${LB_APT}" --distribution "${LB_DISTRIBUTION}" --binary-images "${LB_BINARY_IMAGES}" --architectures "${LIVE_IMAGE_ARCHITECTURE}" --archive-areas "${LIVE_IMAGE_ARCHIVE_AREAS}" --chroot-filesystem "${LB_CHROOT_FILESYSTEM}" --linux-flavours "${LB_LINUX_FLAVOURS}" --security "${LB_SECURITY}" --apt-indices "${LB_APT_INDICES}" --bootappend-install "${LB_BOOTAPPEND_INSTALL}" --bootappend-live "${LB_BOOTAPPEND_LIVE}" --bootloader "${LB_BOOTLOADER}" --debian-installer "${LB_DEBIAN_INSTALLER}" --iso-application "${LB_ISO_APPLICATION}" --iso-preparer "${LB_ISO_PREPARER}" --iso-publisher "${LB_ISO_PUBLISHER}" --iso-volume "${LB_ISO_VOLUME}" --memtest "${LB_MEMTEST}" --net-root-path "${LB_NET_ROOT_PATH}" --net-root-server "${LB_NET_ROOT_SERVER}" --source-images "${LB_SOURCE_IMAGES}" --source "${LB_SOURCE}"
		_ERRORCONFIG="${?}"
	else
		echo "Config stage skipped. The git clone produced an error: ${_ERRORGIT}" >> "${_BUILD_PATH}"/log
	fi

	# Run build if config went ok
	if [ "${_ERRORCONFIG}" -eq "0" ]
	then
		# We need to finish script.
		set +e
		lb build noauto >> "${_BUILD_PATH}"/log 2>&1
		_ERRORBUILD="${?}"
	else
		echo "Build stage skipped. Config produced an error: ${_ERRORCONFIG}" >> "${_BUILD_PATH}"/log
	fi

	_DATE_END="`date -R`"
	echo "End: ${_DATE_END}" >> "${_BUILD_PATH}"/log

	# Creating image directory
	mkdir -p "${_DESTDIR}"/"${_BUILD}"

	# Creating mail and logging.
	if [ "${_ERRORGIT}" -eq "0" ] && [ "${_ERRORCONFIG}" -eq "0" ] && [ "${_ERRORBUILD}" -eq "0" ]
	then
		_STATUS="maybe-successful"
		echo "${REMOTE_ADDR} - - `date +[%d/%b/%Y:%H:%m:%S\ %z]` \"${_BUILD} ${LIVE_IMAGE_ARCHITECTURE}/${LB_DISTRIBUTION}/${_LB_CGIPACKAGES}\" 200 - \"-\" \"\"">>/var/log/live/live-build-cgi-status
	else
		_STATUS="maybe-failed"
		echo "${REMOTE_ADDR} - - `date +[%d/%b/%Y:%H:%m:%S\ %z]` \"${_BUILD} ${LIVE_IMAGE_ARCHITECTURE}/${LB_DISTRIBUTION}/${_LB_CGIPACKAGES}\" 404 - \"-\" \"\"">>/var/log/live/live-build-cgi-status
	fi

	sed -e "s/BUILD/${_BUILD}/g" \
	    -e "s/EMAIL/${_EMAIL}/" \
	    -e "s/VERSION/${VERSION}/" \
	    -e "s/DATE_START/${_DATE_START}/" \
	    -e "s/DATE_END/${_DATE_END}/" \
	    -e "s/STATUS/${_STATUS}/" \
	    -e "s#SERVER#${_SERVER}#" \
	"${_TEMPLATES}"/mail.txt > "${_DESTDIR}"/"${_BUILD}"/mail

cat >> "${_DESTDIR}"/"${_BUILD}"/mail << EOF

---

Here's a list of all build-options that were used to build your image:

EOF

	cat "${_TEMPDIR}"/"${_BUILD}"/"${_BUILD}".build >> "${_DESTDIR}"/"${_BUILD}"/mail

	# Moving live-image-* files
	if Find_files ${_BUILD_PATH}/live-image-*
	then
		mv "${_BUILD_PATH}"/live-image-* "${_DESTDIR}"/"${_BUILD}"
	fi

	# Moving build
	mv "${_TEMPDIR}"/"${_BUILD}"/"${_BUILD}".build "${_DESTDIR}"/"${_BUILD}"/build

	# Moving log
	mv "${_BUILD_PATH}"/log "${_DESTDIR}"/"${_BUILD}"

	# Generating md5sum
	cd "${_DESTDIR}"/"${_BUILD}"
	md5sum * > md5sum
	cd "${OLDPWD}"

	# Sending mail
	cat "${_DESTDIR}"/"${_BUILD}"/mail | /usr/sbin/sendmail -t

	# Unmounting devpts-live
	#if ls "${_TEMPDIR}"/"${_BUILD}"/chroot/dev/pts/* > /dev/null 2>&1
	if Find_files ${_BUILD_PATH}/chroot/dev/pts/*
	then
		umount "${_BUILD_PATH}"/chroot/dev/pts
	fi

	# Unmounting proc
	if [ -f "${_BUILD_PATH}"/chroot/proc/version ]
	then
		umount "${_BUILD_PATH}"/chroot/proc
	fi

	# Unmounting sysfs
	if [ -d "${_BUILD_PATH}"/chroot/sys/kernel ]
	then
		umount "${_BUILD_PATH}"/chroot/sys
	fi

	# Removing build directory
	rm -rf "${_TEMPDIR}"/"${_BUILD}"

	echo "`date +%b\ %d\ %H:%M:%S` ${_HOSTNAME} live-build-cgi: end web build (${_BUILD}: ${_STATUS})." >> /var/log/live/live-build
fi