#

# 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_names="" _restart_check=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 [ -z "${_restart}" ]\

			|| [ "${_restart_recursive:-0}" -eq 1 ]\

			|| [ "${_restart_recursive:-0}" -eq 2 ]; then

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

			fi;

		fi;

		for _pkg_name in ${_pkg_names}; do

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

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

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

					_restart_check=1;

				else

					_restart_check=0;

				fi;

			fi;

			if [ -n "$(rtl_get_var_unsafe -u "PKG_${_pkg_name}_DISABLED")" ]; 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\

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

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

			&& [ "${_restart_recursive:-0}" -ne 3 ]\

			&& [ "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;

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

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

				|| [ -z "${_pkg_depends}" ]\

				|| ! rtl_lmatch "${_pkg_depends}" "${_restart}"; then

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

				fi;

			fi;

		done;

		EXP_PKG_NAMES="${_pkg_names}";

	fi;

	return 0;

};

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