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

ex_pkg_dispatch() {
	local _tgt_name="${1}" _pkg_name="${2}"			\
		_restart="${3}" _restart_at="${4}"		\
		_stdout_path _stderr_path			\
		_pipe_path _pipe_msg _script_rc=1;
	if ex_pkg_state_test "${_pkg_name}" finish		\
	&& [ -z "${_restart}" ]					\
	&& [ "${_tgt_name}" != "INVARIANTS" ]; then
		return 0;
	else
		_pipe_path="${WORKDIR}/${_pkg_name}_build.fifo";
		ex_build_fileop rm "${_pipe_path}"; mkfifo "${_pipe_path}";
		_stderr_path="${WORKDIR}/${_pkg_name}_stderr.log";
		_stdout_path="${WORKDIR}/${_pkg_name}_stdout.log";
		ex_build_fileop rm "${_stderr_path}" "${_stdout_path}";
	fi;
	(set -o errexit -o noglob;
	trap "if [ \${?} -eq 0 ]; then				\
		echo \"done ${PKG_NAME}\" >&3;			\
	      else						\
		echo \"fail ${PKG_NAME}\" >&3;			\
	      fi;" EXIT HUP INT TERM USR1 USR2;
	if [ "${ARG_XTRACE:-0}" -eq 1 ]; then
		set -o xtrace;
	fi;
	ex_pkg_vars;
	if [ "${PKG_DISABLED:-0}" -eq 1 ]; then
		ex_log_msg vnfo "Skipping disabled package \`${PKG_NAME}.'";
	else
		ex_pkg_env;
		ex_pkg_steps "${_tgt_name}" "${_pkg_name}"	\
			"${_restart}" "${_restart_at}";
	fi;)	1>"${_stdout_path}" 2>"${_stderr_path}"		\
		3>"${_pipe_path}" &
	while read _pipe_msg; do
	case "${_pipe_msg%% *}" in
	done)	_script_rc=0; break; ;;
	fail)	_script_rc=1; break; ;;
	*)	_script_rc=1; break; ;;
	esac; done <"${_pipe_path}";
	ex_build_fileop rm "${_pipe_path}";
	return "${_script_rc:-1}";
};

# vim:filetype=sh