_config

#!/usr/bin/env bash
source ${HOME}/.bashrc
set -e
################################################################################

declare DIR="$(dirname ${_SELF})"

declare OPT="$(realpath ${DIR}/.options)"
declare CFG="$(realpath ${DIR}/.config)"

declare SRC="${DIR}/$(head -n2 ${OPT} | tail -n1 | ${SED} "s|^[#][ ]||g")"

########################################

if [[ -d ${1} ]]; then
	declare LNX="${1}"
	shift
else
	exit 1
fi

declare CHR="$(echo "${LNX}" | ${SED} "s|/usr/src/linux$||g")"
declare CHL="$(echo "${LNX}" | ${SED} "s|^${CHR}||g")"

################################################################################

function reconfigure {
	declare CONFIG="${1}" && shift
	{
		${SED} -n "s|^[^#].+[[:space:]](CONFIG_[[:alnum:]_]+)[=]([\"][^\"]+[\"]).*$|\1:\2|gp" ${OPT};
		${SED} -n "s|^[^#].+[[:space:]](CONFIG_[[:alnum:]_]+)[=]([ynm]).*$|\1:\2|gp" ${OPT};
	} | while read -r FILE; do
		declare KEY="${FILE/%:*}"
		declare VAL="${FILE/#*:}"
		echo "${KEY} -> ${VAL}"
		${SED} -i "s|^([#][ ])?(${KEY})[= ].+$|\2=${VAL}|g" ${CONFIG}
	done
	return 0
}

################################################################################

${RM} ${CFG}.${SCRIPT}.*

########################################

${RSYNC_U} ${CFG} ${CFG}.${SCRIPT}.ORIG
reconfigure ${CFG}.${SCRIPT}.ORIG
diff ${DIFF_OPTS} ${SRC} ${CFG}.${SCRIPT}.ORIG | sort -u | ${GREP} "^[+]"

${RSYNC_U} ${CFG}.${SCRIPT}.ORIG ${LNX}/.config
if [[ -n "${CHR}" ]]; then
	chroot ${CHR} bash -c "(cd ${CHL} && make olddefconfig)"
else
	(cd ${LNX} && make olddefconfig)
fi
${RSYNC_U} ${LNX}/.config ${CFG}.${SCRIPT}.DONE

${RSYNC_U} ${CFG}.${SCRIPT}.DONE ${CFG}.${SCRIPT}.TEST
reconfigure ${CFG}.${SCRIPT}.TEST
diff ${DIFF_OPTS} ${CFG}.${SCRIPT}.DONE ${CFG}.${SCRIPT}.TEST | sort -u | ${GREP} "^[+]"

########################################

echo -en "\n"
${LL} ${CFG}*

exit 0
################################################################################
# end of file
################################################################################