#

# set +o errexit -o noglob -o nounset is assumed.

#

exp_pkg_exec_filter_vars_fn() {

	local _vname="${1}";

	case "${_vname}" in

	DEFAULT|PKG_*)

		return 0; ;;

	BUILD_DLCACHEDIR|BUILD_WORKDIR|MIDIPIX_BUILD_PWD)

		return 0; ;;

	CONFIG_CACHE_GNULIB)

		return 0; ;;

	PREFIX|PREFIX_CROSS|PREFIX_MINGW32|PREFIX_MINIPIX|PREFIX_NATIVE|PREFIX_RPM)

		return 0; ;;

	*)	return 1; ;;

	esac;

};

#

# exp_pkg_exec_pre() - XXX

# @_group_name:		build group name

# @_pkg_name:		single package name

# @_restart_at:		optional comma-separated list of build steps at which to rebuild or ALL or LAST

#

# Return:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_exec_pre() {

	local _group_name="${1}" _pkg_name="${2}" _restart_at="${3}";

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

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

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

	&& ! rtl_test_cmd "pkg_${_pkg_name}_all"; then

		"${_dispatch_fn}" missing_pkg "${_group_name}" "${_pkg_name}";

		return 1;

	elif ! ex_pkg_state_test "${_pkg_name}" "start" "${_restart_at}"; then

		if [ "${PKG_NO_CLEAN_BASE_DIR:-0}" -eq 0 ]\

		&& ! rtl_fileop rm "${PKG_BASE_DIR}" "${PKG_BUILD_DIR}" "${PKG_DESTDIR}" "${PKG_DESTDIR_HOST}"\

		|| ! rtl_fileop mkdir "${PKG_BASE_DIR}"; then

			return 1;

		fi;

		if ! rtl_fileop mkdir "${PKG_BUILD_DIR}" "${PKG_DESTDIR}"\

		|| ! ex_pkg_state_set "${_pkg_name}" "start"; then

			return 1;

		fi;

	fi;

	rtl_fileop cd "${PKG_BUILD_DIR}";

};

#

# exp_pkg_exec_step() - XXX

# @_group_name:		build group name

# @_pkg_name:		single package name

# @_restart_at:		optional comma-separated list of build steps at which to rebuild or ALL or LAST

# @_step:		build step to execute

#

# Return:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_exec_step() {

	local	_group_name="${1}" _pkg_name="${2}" _restart_at="${3}" _step="${4}"	\

		_fn_name="" _pkg_step_fn="" _rc=0;

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

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

	else

		_pkg_step_fn="pkg_${_step}";

	fi;

	for _fn_name in \

			"pkg_${_pkg_name}_${_step}_pre"	\

			"${_pkg_step_fn}"		\

			"pkg_${_pkg_name}_${_step}_post"; do

		if rtl_test_cmd "${_fn_name}"\

		&& ! "${_fn_name}" "${_group_name}" "${_pkg_name}" "${_restart_at}"; then

			_rc=1; break;

		fi;

	done;

	return "${_rc}";

};

#

# exp_pkg_exec() - XXX

# @_dispatch_fn:	top-level dispatch function name

# @_group_name:		build group name

# @_pkg_name:		single package name

# @_restart_at:		optional comma-separated list of build steps at which to rebuild or ALL or LAST

#

# Return:		zero (0) on success, non-zero (>0) on failure

#

ex_pkg_exec() {

	local	_dispatch_fn="${1}" _group_name="${2}" _pkg_name="${3}" _restart_at="${4}"	\

		_build_step_last="" _rc=0 _step="";

	if ! exp_pkg_exec_pre "${_group_name}" "${_pkg_name}" "${_restart_at}"\

	|| ! "${_dispatch_fn}" start_pkg_child "${_group_name}" "${_pkg_name}"; then

		_rc=1;

	elif rtl_test_cmd "pkg_${_pkg_name}_all"; then

		"pkg_${_pkg_name}_all" "${_restart_at}"; _rc="${?}";

	else	set -- $(rtl_lfilter "${PKG_BUILD_STEPS}" "start");

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

			_step="${1}"; shift;

			if [ "${#_restart_at}" -gt 0 ]\

			&& [ "${_restart_at}" != "ALL" ]\

			&& [ "${_restart_at}" != "LAST" ]\

			&& ! rtl_lmatch "${_restart_at}" "${_step}" ","; then

				continue;

			fi;

			if [ "${_step}" = "${ARG_DUMP_IN}" ]; then

				printf "" > "${BUILD_WORKDIR}/${_pkg_name}.dump";

				rtl_filter_vars exp_pkg_exec_filter_vars_fn >> "${BUILD_WORKDIR}/${_pkg_name}.dump";

				export >> "${BUILD_WORKDIR}/${_pkg_name}.dump"; exit 1;

			elif [ "${_step}" = "finish" ]; then

				ex_pkg_state_set "${_pkg_name}" finish; break;

			elif [ "${PKG_FORCE:-0}" -eq 0 ]\

			&&   ex_pkg_state_test "${_pkg_name}" "${_step}" "${_restart_at}"; then

				continue;

			elif ! exp_pkg_exec_step "${_group_name}" "${_pkg_name}" "${_restart_at}" "${_step}"; then

				_rc=1; break;

			else	printf "step %s %s %s\n" "${_group_name}" "${_pkg_name}" "${_step}" >&3;

				ex_pkg_state_set "${_pkg_name}" "${_step}" "${@}";

			fi;

		done;

	fi;

	if [ "${_rc:-0}" -ne 0 ]\

	&&   [ "${ARG_DUMP_ON_ABORT:-0}" -eq 1 ]; then

		printf "" > "${BUILD_WORKDIR}/${_pkg_name}.dump";

		rtl_filter_vars exp_pkg_exec_filter_vars_fn >> "${BUILD_WORKDIR}/${_pkg_name}.dump";

		export >> "${BUILD_WORKDIR}/${_pkg_name}.dump";

	fi;

	return "${_rc}";

};

# vim:filetype=sh