#

# set +o errexit -o noglob is assumed.

#

#

# ex_pkg_check_depends() - check single named package for unsatisfied dependencies

# @_pkg_complete:	list of completed packages

# @_pkg_name:		single package name

# @_pkg_wait:		list of in-progress packages

# @_restart_recursive:	optional flag specifiying either no dependency expansion (0,) dependency expansion (1,) dependency expansion and forcibly rebuild (2,) forcibly rebuild reverse dependencies (3.)

#

# Return:		zero (0) given no outstanding dependencies, non-zero (>0) otherwise

#

ex_pkg_check_depends() {

	local	_pkg_complete="${1}" _pkg_name="${2}" _pkg_wait="${3}" _restart_recursive="${4}"	\

		_pkg_depends="" _pkg_name_depend="" _dependfl=0;

	if _pkg_depends="$(rtl_lunfold_depends 'PKG_${_name}_DEPENDS' $(rtl_get_var_unsafe -u "PKG_"${_pkg_name}"_DEPENDS"))"\

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

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

		|| [ "${_restart_recursive:-0}" -ge 1 ]; then

			for _pkg_name_depend in $(rtl_uniq ${_pkg_depends}); do

				if ! rtl_lmatch "${_pkg_complete}" "${_pkg_name_depend}"\

				|| rtl_lmatch "${_pkg_wait}" "${_pkg_name_depend}"; then

					_dependfl=1; break;

				fi;

			done;

		fi;

	fi;

	return "${_dependfl}";

};

#

# ex_pkg_expand_packages() - expand build group name to list of packages ordered and filtered according to dependency and restart constraints

# @_group_name:		build group name

# @_restart:		optional whitespace-separated list of package names to rebuild

# @_restart_recursive:	optional flag specifiying either no dependency expansion (0,) dependency expansion (1,) dependency expansion and forcibly rebuild (2,) forcibly rebuild reverse dependencies (3.)

#

# Return:		zero (0) on success, non-zero (>0) on failure, ${EXP_PKG_COMPLETE}, ${EXP_PKG_DISABLED}, ${EXP_PKG_FINISHED}, and ${EXP_PKG_NAMES} set post-return.

#

ex_pkg_expand_packages() {

	local	_group_name="${1}" _restart="${2}" _restart_recursive="${3}"		\

		_pkg_depends="" _pkg_name="" _pkg_name_depend="" _pkg_names=""		\

		_pkg_rdepends="" _restartfl=0;

	EXP_PKG_COMPLETE=""; EXP_PKG_DISABLED=""; EXP_PKG_FINISHED=""; EXP_PKG_NAMES="";

	if _pkg_names="$(rtl_get_var_unsafe -u "${_group_name}_PACKAGES")"\

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

		if [ "${_restart_recursive:-0}" -ne 3 ]; then

			if [ -n "${_restart}" ] && ! rtl_lmatch "${_restart}" "ALL LAST"; then

				_pkg_names="$(rtl_lsearch "${_pkg_names}" "${_restart}")";

			fi;

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

			&& [ "${_restart_recursive:-0}" -ge 1 ]\

			&& [ "${_restart_recursive:-0}" -le 2 ]; then

				_pkg_names="$(rtl_uniq $(rtl_lunfold_depends 'PKG_${_name}_DEPENDS' ${_pkg_names}))";

			fi;

			for _pkg_name in ${_pkg_names}; do

				if [ "${_restart}" = "ALL" ]\

				|| rtl_lmatch "${_restart}" "${_pkg_name}"; then

					_restartfl=1;

				else

					_restartfl=0;

				fi;

				if [ "x$(rtl_get_var_unsafe -u "PKG_${_pkg_name}_DISABLED")" = "x1" ]; then

					EXP_PKG_COMPLETE="$(rtl_lconcat "${EXP_PKG_COMPLETE}" "${_pkg_name}")";

					EXP_PKG_DISABLED="$(rtl_lconcat "${EXP_PKG_DISABLED}" "${_pkg_name}")";

					_pkg_names="$(rtl_lfilter "${_pkg_names}" "${_pkg_name}")";

				elif ex_pkg_state_test "${_pkg_name}" finish\

				&& [ "${_restartfl:-0}" -eq 0 ]\

				&& [ "${_restart_recursive:-0}" -ne 2 ]\

				&& [ "x$(rtl_get_var_unsafe -u "${_group_name}_FORCE")" != "x1" ]; then

					EXP_PKG_COMPLETE="$(rtl_lconcat "${EXP_PKG_COMPLETE}" "${_pkg_name}")";

					EXP_PKG_FINISHED="$(rtl_lconcat "${EXP_PKG_FINISHED}" "${_pkg_name}")";

					_pkg_names="$(rtl_lfilter "${_pkg_names}" "${_pkg_name}")";

				fi;

			done;

		else	for _pkg_name_depend in ${_restart}; do

				for _pkg_name in ${_pkg_names}; do

					if [ "${_pkg_name}" != "${_pkg_name_depend}" ]\

					&& [ "x$(rtl_get_var_unsafe -u "PKG_${_pkg_name}_DISABLED")" != "x1" ]\

					&& _pkg_depends="$(rtl_lunfold_depends 'PKG_${_name}_DEPENDS' $(rtl_get_var_unsafe -u "PKG_"${_pkg_name}"_DEPENDS"))"\

					&& [ -n "${_pkg_depends}" ]\

					&& rtl_lmatch "${_pkg_depends}" "${_pkg_name_depend}"; then

						_pkg_rdepends="$(rtl_lconcat "${_pkg_rdepends}" "${_pkg_name}")";

					fi;

				done;

			done;

			_pkg_names="";

			for _pkg_name in ${_pkg_rdepends}; do

				if _pkg_depends="$(rtl_lunfold_depends 'PKG_${_name}_DEPENDS' $(rtl_get_var_unsafe -u "PKG_"${_pkg_name}"_DEPENDS"))"\

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

					for _pkg_name_depend in ${_pkg_depends}; do

						if [ "x$(rtl_get_var_unsafe -u "PKG_${_pkg_name_depend}_DISABLED")" = "x1" ]; then

							EXP_PKG_COMPLETE="$(rtl_lconcat "${EXP_PKG_COMPLETE}" "${_pkg_name_depend}")";

							EXP_PKG_DISABLED="$(rtl_lconcat "${EXP_PKG_DISABLED}" "${_pkg_name_depend}")";

						elif ex_pkg_state_test "${_pkg_name_depend}" finish\

						&& [ "x$(rtl_get_var_unsafe -u "${_group_name}_FORCE")" != "x1" ]\

						&& ! rtl_lmatch "${_pkg_rdepends}" "${_pkg_name_depend}"; then

							EXP_PKG_COMPLETE="$(rtl_lconcat "${EXP_PKG_COMPLETE}" "${_pkg_name_depend}")";

							EXP_PKG_FINISHED="$(rtl_lconcat "${EXP_PKG_FINISHED}" "${_pkg_name_depend}")";

						elif ! ex_pkg_state_test "${_pkg_name_depend}" finish\

						|| [ "x$(rtl_get_var_unsafe -u "${_group_name}_FORCE")" = "x1" ]; then

							_pkg_names="$(rtl_lconcat "${_pkg_names}" "${_pkg_name_depend}")";

						fi;

					done;

				fi;

				_pkg_names="$(rtl_lconcat "${_pkg_names}" "${_pkg_name}")";

			done;

			EXP_PKG_COMPLETE="$(rtl_uniq ${EXP_PKG_COMPLETE})";

			EXP_PKG_DISABLED="$(rtl_uniq ${EXP_PKG_DISABLED})";

			EXP_PKG_FINISHED="$(rtl_uniq ${EXP_PKG_FINISHED})";

			_pkg_names="$(rtl_uniq ${_pkg_names})";

		fi;

		EXP_PKG_NAMES="${_pkg_names}";

	fi;

	return 0;

};

# vim:filetype=sh textwidth=0