#

# set -o errexit -o noglob are assumed.

#

ex_pkg_steps() {

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

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

		_step _step_type					\

		_step_cmds _step_cmd_args				\

		_step_cmd_pfx _step_cmd _step_next;

	set -- $(ex_lfilter -not "${BUILD_STEPS}" "${PKG_BUILD_STEPS_DISABLE}");

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

		_step="${1}"; _step_next="${2}";

		_step_cmds=""; _step_cmd_args="";

		_step_type="${_step#*:}";

		_step="${_step%%:*}";

		_step_cmd_pfx="pkg_${_pkg_name}_${_step}";

		case "${_step_type}" in

		dynamic)

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

				_step_cmds="${_step_cmd_pfx} pkg_${_step}";

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

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

				|| ex_lmatch "${_restart_at}" , "${_step}"; then

					_step_cmds="${_step_cmd_pfx} pkg_${_step}";

				fi;

			elif ! ex_pkg_state_test "${_pkg_name}" "${_step}"; then

				_step_cmds="${_step_cmd_pfx} pkg_${_step}";

			fi; ;;

		invariant)

			_step_cmds="pkg_${_step}"; ;;

		variant)

			if ex_lmatch "${_restart_at}" "," "${_step}"; then

				_step_cmds="${_step_cmd_pfx} pkg_${_step}";

			fi; ;;

		virtual)

			_step_cmds="pkg_${_pkg_name}_${_step}";

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

		all)

			if ex_test_cmd "pkg_${_pkg_name}_${_step}"; then

				"${_step_cmd_pfx}" "${_restart_at:-ALL}";

				break;

			fi; ;;

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

		*)	;;

		esac;

		for _step_cmd in ${_step_cmds}; do

			if ex_test_cmd "${_step_cmd}"; then

				ex_test_cmd "${_step_cmd_pfx}_pre"	\

					&& "${_step_cmd_pfx}_pre"

				"${_step_cmd}" ${_step_cmd_args};

				ex_test_cmd "${_step_cmd_pfx}_post"	\

					&& "${_step_cmd_pfx}_post"

				if [ "${_step_type}" != "invariant" ]	\

				&& [ -n "${_step_next}" ]; then

					ex_pkg_state_push "${_pkg_name}" "${_step}";

					ex_pkg_state_push "${_pkg_name}" "-${_step_next}";

				else

					ex_pkg_state_push "${_pkg_name}" "${_step}";

				fi; break;

			fi;

		done;

	shift; done;

};

# vim:filetype=sh