build_ast() {

	local _param="${1}" _pids_killed="";

	rm -f "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";

	case "${_param}" in

	abort) ex_rtl_log_msg failexit "Build aborted."; ;;

	esac;

	ex_rtl_kill_tree "${$}";

	if [ -n "${_pids_killed}" ]; then

		ex_rtl_log_msg vnfo "Killed PIDs ${_pids_killed}";

	fi;

};

build_fini() {

	: $((BUILD_TIMES_SECS=$(ex_rtl_date %s)-${BUILD_TIMES_SECS}));

	: $((BUILD_TIMES_HOURS=${BUILD_TIMES_SECS}/3600));

	: $((BUILD_TIMES_MINUTES=(${BUILD_TIMES_SECS}%3600)/60));

	: $((BUILD_TIMES_SECS=(${BUILD_TIMES_SECS}%3600)%60));

	if [ -f "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then

		ex_rtl_fileop rm ${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME};

	fi;

};

build_init() {

	local __="" _env_vars="" _env_vars_except="" _env_var="" _log_last_fname="" _log_last_ts="" _vname="" _vname_val="";

	umask 022;

	if ! awk -V 2>/dev/null | grep -q "^GNU Awk "; then

		ex_rtl_log_msg failexit "Error: awk(1) in \$PATH must be GNU Awk.";

	fi;

	if ! which pgrep >/dev/null 2>&1; then

		ex_rtl_log_msg failexit "Error: missing pgrep.";

	fi;

	if [ -z "${DEFAULT_BUILD_CPUS}" ]\

	&& [ -e /proc/cpuinfo ]; then

		DEFAULT_BUILD_CPUS=$(awk '/^processor/{cpus++} END{print cpus}' /proc/cpuinfo);

	fi;

	if [ "${ARG_PARALLEL}" = auto ]; then

		ARG_PARALLEL="${DEFAULT_BUILD_CPUS}";

	fi;

	: ${ARCH:=nt64}; : ${BUILD:=debug};

	if [ "${ARCH}" = nt32 ]; then

		DEFAULT_TARGET="i686-nt32-midipix";

	elif [ "${ARCH}" = nt64 ]; then

		DEFAULT_TARGET="x86_64-nt64-midipix";

	else

		if [ "${BUILD}" != debug ]\

		&& [ "${BUILD}" != release ]; then

			ex_rtl_log_msg failexit "Error: unknown build type \`${BUILD}'.";

		fi;

		ex_rtl_log_msg failexit "Error: invalid architecture \`${ARCH}'.";

	fi;

	for __ in ${HOME}/midipix_build.vars ${HOME}/.midipix_build.vars ../midipix_build.vars ./vars/env.vars; do

		[ -e ${__} ] && . ${__};

	done;

	for __ in $(find ./groups -name *.group | sort); do

		. "${__}"; __="${__##*/}"; __="${__%.group}";

		if [ "${__#[0-9][0-9][0-9].*}" != "${__}" ]\

		&& [ "${__#*[1-9].*}" = "${__}" ]\

		&& [ "${__}" != "999.invariants.group" ]; then

			GROUPS_DEFAULT="${GROUPS_DEFAULT:+${GROUPS_DEFAULT} }${__#*.}";

		fi;

	done;

	if [ "${ARG_AS_NEEDED:-0}" -eq 1 ]\

	&& [ -e "${PREFIX}/build.gitref" ]\

	&& [ "$(git rev-parse HEAD)" = "$(cat "${PREFIX}/build.gitref")" ]; then

		ex_rtl_log_msg info "Git repository has not changed since last build and --as-needed was specified.";

		exit 0;

	fi;

	export PATH="${PREFIX}/bin${PATH:+:${PATH}}";

	if [ "${ARG_FETCH_FORCE}" = "ipv4" ]; then

		DEFAULT_GIT_ARGS="-4${DEFAULT_GIT_ARGS:+ ${DEFAULT_GIT_ARGS}}";

		DEFAULT_WGET_ARGS="-4${DEFAULT_WGET_ARGS:+ ${DEFAULT_WGET_ARGS}}";

	elif [ "${ARG_FETCH_FORCE}" = "ipv6" ]; then

		DEFAULT_GIT_ARGS="-6${DEFAULT_GIT_ARGS:+ ${DEFAULT_GIT_ARGS}}";

		DEFAULT_WGET_ARGS="-6${DEFAULT_WGET_ARGS:+ ${DEFAULT_WGET_ARGS}}";

	fi;

	_env_vars="$(export | sed -ne '/^export/{s/^export //;s/=.*$//p}')";

	_env_vars_except="${DEFAULT_CLEAR_ENV_VARS_EXCEPT}";

	for _env_var in ${_env_vars}; do

		if [ "${_env_var#DEFAULT_}" != "${_env_var}" ]\

		|| [ "${_env_var#PKG_}" != "${_env_var}" ]; then

			_env_vars_except="${_env_vars_except:+${_env_vars_except} }${_env_var}";

		fi;

	done;

	ex_rtl_unset_vars $(ex_rtl_lfilter "${_env_vars}" "${_env_vars_except}");

	ex_rtl_fileop mkdir "${BUILD_DLCACHEDIR}" "${BUILD_WORKDIR}";

	if ex_rtl_lmatch "${ARG_DIST}" , rpm; then

		ex_rtl_fileop mkdir "${PREFIX_RPM}";

	fi;

	if [ -e "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then

		ex_rtl_log_msg failexit "Error: another build targeting this architecture and build type is currently in progress.";

	else

		touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";

	fi;

	if [ -e "${DEFAULT_BUILD_LOG_FNAME}" ]; then

		_log_last_ts="$(stat -c %Y "${DEFAULT_BUILD_LOG_FNAME}")";

		_log_last_ts="$(awk 'BEGIN {printf(strftime("%Y-%m-%d-%H-%M-%S", '"${_log_last_ts}"'))}')";

		_log_last_fname="${DEFAULT_BUILD_LOG_FNAME}.${_log_last_ts}";

		ex_rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME}" "${_log_last_fname}";

		ex_rtl_fileop ln_symbolic "${_log_last_fname}" "${DEFAULT_BUILD_LOG_LAST_FNAME}";

	fi;

	ex_rtl_fileop touch "${DEFAULT_BUILD_LOG_FNAME}";

	BUILD_IS_PARENT=1;

	BUILD_DATE_START="$(ex_rtl_date %Y-%m-%d-%H-%M-%S)";

	BUILD_NFINI="${BUILD_NSKIP:=${BUILD_NFAIL:=${BUILD_NBUILT:=0}}}";

	BUILD_TIMES_SECS="$(ex_rtl_date %s)";

	BUILD_PKGS_FAILED="";

	trap "build_ast abort" HUP INT TERM USR1 USR2; trap "build_ast exit" EXIT;

	for _vname in ${DEFAULT_CHECK_PATH_VARS}; do

		_vname_val="$(ex_rtl_get_var_unsafe "${_vname}")";

		if [ -z "${_vname_val}" ]; then

			ex_rtl_log_msg failexit "Error: variable \`${_vname}' is empty or unset.";

		elif [ "${_vname_val#* *}" != "${_vname_val}" ]; then

			ex_rtl_log_msg failexit "Error: variable \`${_vname}' contains one or more whitespace characters.";

		fi;

	done;

	if ex_rtl_lmatch "${ARG_CLEAN_BUILDS}" , prefix; then

		ex_rtl_log_msg info "-C prefix specified, cleaning prefix...";

		for _pname in ${DEFAULT_CLEAR_PREFIX_PATHS}; do

			ex_rtl_fileop rm "${PREFIX}/${_pname}";

		done;

	fi;

};

# vim:filetype=sh