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#
# set -o errexit -o noglob are assumed.
#

ex_pkg_dispatch() {
	local _tgt_name="${1}" _restart="${2}" _restart_at="${3}"		\
		_dispatch_fn="${4}" _tgt_name_uc				\
		_pkg_names _pkg_name _pkg_name_uc				\
		_pipe_path _stderrout_path _pipe_msg _script_rc;
	ex_rtl_fileop mkdir "${BUILD_WORKDIR}";
	_pipe_path="${BUILD_WORKDIR}/build.fifo";
	_tgt_name_uc="$(ex_rtl_toupper "${_tgt_name}")";
	"${_dispatch_fn}" start_target "" "${_tgt_name}";
	_pkg_names="$(ex_rtl_get_var_unsafe ${_tgt_name_uc}_PACKAGES)";
	if [ -n "${_restart}" ]\
	&& [ "${_restart}" != ALL ]; then
		_pkg_names="$(ex_rtl_lfilter "${_pkg_names}" "${_restart}")";
	fi;
	for _pkg_name in ${_pkg_names}; do
		_pkg_name_uc="$(ex_rtl_toupper "${_pkg_name}")";
		if [ -n "$(ex_rtl_get_var_unsafe PKG_${_pkg_name_uc}_DISABLED)" ]; then
			"${_dispatch_fn}" disabled_pkg "${_pkg_name}" "${_tgt_name}";
			continue;
		elif ex_pkg_state_test "${_pkg_name}" finish\
		&& [ -z "${_restart_at}" ]; then
			"${_dispatch_fn}" skipped_pkg "${_pkg_name}" "${_tgt_name}";
			continue;
		else
			ex_rtl_fileop mkfifo "${_pipe_path}";
			_stderrout_path="${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
			_script_rc=1;
			"${_dispatch_fn}" start_pkg "${_pkg_name}" "${_tgt_name}";
		fi;
		(set -o errexit -o noglob;
		ex_pkg_env "${_pkg_name}" "${_tgt_name}" "${_restart_at}";
		trap "if [ \${?} -eq 0 ]; then					\
			echo \"done ${PKG_NAME}\" >&3;				\
		      else							\
			echo \"fail ${PKG_NAME}\" >&3;				\
		      fi;" EXIT HUP INT TERM USR1 USR2;
		ex_pkg_exec "${_pkg_name}" "${_tgt_name}" "${_restart_at}"	\
			"${_dispatch_fn}";) 1>"${_stderrout_path}" 2>&1 3>"${_pipe_path}" &
		while read _pipe_msg; do
		case "${_pipe_msg%% *}" in
		done)	_script_rc=0;
			"${_dispatch_fn}" finish_pkg "${_pkg_name}" "${_tgt_name}";
			break; ;;
		fail)	_script_rc=1;
			"${_dispatch_fn}" fail_pkg "${_pkg_name}" "${_tgt_name}";
			break; ;;
		step)	"${_dispatch_fn}" step_pkg ${_pipe_msg#step }; ;;
		*)	_script_rc=1;
			"${_dispatch_fn}" fail_pkg "${_pkg_name}" "${_tgt_name}";
			break; ;;
		esac; done <"${_pipe_path}";
		ex_rtl_fileop rm "${_pipe_path}";
		if [ "${_script_rc:-1}" -eq 1 ]; then
			return 1;
		fi;
	done;
	"${_dispatch_fn}" finish_target "" "${_tgt_name}";
};

# vim:filetype=sh