#

# 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;

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

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

	fi;

	(set -o errexit -o noglob;

	ex_pkg_vars; ex_pkg_env;

	ex_build_fileop mkdir "${PKG_BASE_DIR}";

	ex_build_fileop cd "${PKG_BASE_DIR}";

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

	|| [ "${_tgt_name}" = "INVARIANTS" ]\

	|| ! ex_pkg_state_test "${_pkg_name}" finish; then

		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;

	fi); return ${?};

};

# vim:filetype=sh