#

# set -o errexit -o noglob are assumed.

#

ex_pkg_dispatch() {

	local _tgt_name="${1}" _pkg_name="${2}"		\

		_restart="${3}" _restart_at="${4}"	\

		_pkg_step_cmds _pkg_step_cmd_args	\

		_stdout_path _stderr_path		\

		_pipe_path _pipe_path2 _pipe_msg _script_rc;

	if [ "${_pkg_name#*_flavour_*}" != "${_pkg_name}" ]; then

		PKG_NAME_PARENT="${_pkg_name%_flavour_*}";

	fi;

	if ex_pkg_state_test "${_pkg_name}" finish; then

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

		&& [ "${_tgt_name}" != "INVARIANTS" ]; then

			return 0;

		fi;

	fi;

	_pipe_path="${WORKDIR}/${_pkg_name}_build.fifo";

	ex_build_fileop rm "${_pipe_path}"; mkfifo "${_pipe_path}";

	_pipe2_path="${WORKDIR}/${_pkg_name}_build2.fifo";

	ex_build_fileop rm "${_pipe2_path}"; mkfifo "${_pipe2_path}";

	_stderr_path="${WORKDIR}/${_pkg_name}_stderr.log";

	_stdout_path="${WORKDIR}/${_pkg_name}_stdout.log";

	ex_build_fileop rm "${_stderr_path}" "${_stdout_path}";

	(set -o errexit -o noglob;

	ex_pkg_vars;

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

	&& [ -z "${PKG_URLS_GIT}" ]\

	&& [ -z "${PKG_VERSION}" ]\

	&& ! ex_test_cmd "pkg_${PKG_NAME}_all"; then

		ex_log_msg failexit "Error: package \`${PKG_NAME}' missing in build.vars.";

		exit 1;

	elif [ "${PKG_DISABLED:-0}" -eq 1 ]; then

		ex_log_msg vnfo "Skipping disabled package \`${PKG_NAME}.'";

		echo "done ${PKG_BASE_DIR}" >&3; exit 0;

	else

		ex_pkg_env;

		ex_build_fileop mkdir "${PKG_BASE_DIR}";

		ex_build_fileop cd "${PKG_BASE_DIR}";

	fi;

	set -- $(ex_lfilter -not "${BUILD_STEPS}"	\

			"$(ex_get_var_unsafe PKG_$(ex_toupper "${_pkg_name}")_BUILD_STEPS_DISABLE)");

	while [ ${#} -gt 0 ]; do

		_pkg_step_cmds=""; _pkg_step_cmd_args="";

		case "${1#*:}" in

		dynamic)

			if [ "${_tgt_name}" = "INVARIANTS" ]; then

				_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";

			elif [ -n "${_restart}" ]; then

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

				|| ex_lmatch "${_restart_at}" , "${1%:*}"; then

					_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";

				fi;

			elif ! ex_pkg_state_test "${_pkg_name}" "${1%:*}"; then

				_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";

			fi; ;;

		invariant)

			_pkg_step_cmds="pkg_${1%:*}"; ;;

		variant)

			if ex_lmatch "${_restart_at}" "," "${1%:*}"; then

				_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";

			fi; ;;

		virtual)

			_pkg_step_cmds="pkg_${_pkg_name}_${1%:*}";

			_pkg_step_cmd_args="${_restart_at:-ALL}"; ;;

		all)

			if ex_test_cmd "pkg_${_pkg_name}_${1%:*}"; then

				"pkg_${_pkg_name}_${1%:*}" "${_restart_at:-ALL}";

				break;

			fi; ;;

		finish)	ex_pkg_state_push "${_pkg_name}" finish; ;;

		*)	;;

		esac;

		for __ in ${_pkg_step_cmds}; do

			if ex_test_cmd "${__}"; then

				ex_test_cmd "pkg_${_pkg_name}_${1%:*}_pre"	\

					&& "pkg_${_pkg_name}_${1%:*}_pre"

				"${__}" ${_pkg_step_cmd_args};

				ex_test_cmd "pkg_${_pkg_name}_${1%:*}_post"	\

					&& "pkg_${_pkg_name}_${1%:*}_post"

				if [ "${1#*:}" != "invariant" ]\

				&& [ ${#} -ge 2 ]; then

					ex_pkg_state_push "${_pkg_name}" "${1%:*}" "-${2#*:}";

				else

					ex_pkg_state_push "${_pkg_name}" "${1%:*}";

				fi; break;

			fi;

		done;

	shift; done; set -o xtrace

	echo "done ${PKG_BASE_DIR}" >&3; read __ <&4;)	\

		1>"${_stdout_path}" 2>"${_stderr_path}"	\

		3<>"${_pipe_path}" 4<>"${_pipe2_path}" &

	_script_rc=1; while read _pipe_msg <"${_pipe_path}"; do

	case "${_pipe_msg%% *}" in

	done)	echo >"${_pipe2_path}"; _script_rc=0; break; ;;

	*)	break; ;;

	esac; done;

	ex_build_fileop rm "${_pipe_path}";

	return "${_script_rc:-0}";

};

# vim:filetype=sh