#

# set +o errexit -o noglob is assumed.

#

#

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

# @_pkg_disabled:	list of disabled packages

# @_pkg_finished:	list of finished 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_disabled="${1}" _pkg_finished="${2}" _pkg_name="${3}"	\

		_pkg_wait="${4}" _restart_recursive="${5}"			\

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

	if _pkg_depends="$(rtl_uniq $(rtl_lunfold_depends 'PKG_${_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 "${_pkg_disabled}" "${_pkg_name_depend}"\

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

					_dependfl=1; break;

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

					_dependfl=1; break;

				fi;

			done;

		fi;

	fi;

	return "${_dependfl}";

};

#

# ex_pkg_find_package() - find build group a single named package belongs to

# @_group_names:	build group names

# @_pkg_name:		single named package

#

# Return:		zero (0) on success, non-zero (>0) if package not found, group name on stdout if package was found.

#

ex_pkg_find_package() {

	local _group_names="${1}" _pkg_name="${2}" _group_name="" _pkg_names="";

	for _group_name in ${_group_names}; do

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

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

		&& rtl_lmatch "${_pkg_names}" "${_pkg_name}"; then

			_foundfl=1; break;

		fi;

	done;

	case "${_foundfl:-0}" in

	0)	return 1; ;;

	1)	echo "${_group_name}"; return 0; ;;

	esac;

};

#

# ex_pkg_get_packages() - get list of packages belonging to single named build group

# @_group_name:	build group name

#

# Return:	zero (0) on success, non-zero (>0) on failure, list of package names on stdout on success.

#

ex_pkg_get_packages() {

	local _group_name="${1}" _pkg_names="";

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

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

		echo "${_pkg_names}"; return 0;

	else

		return 1;

	fi;

};

#

# ex_pkg_unfold_depends() - unfold list of package names into dependency-expanded set of complete, disabled, finished, and outstanding package names

# @_group_name:		build group name

# @_pkg_names:		list of package names

# @_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.)

# @_test_finished:	only exclude disabled packages from ${EX_PKG_NAMES} (0,) split finished packages into ${EX_PKG_FINISHED}

#

# Return:		zero (0) on success, non-zero (>0) on failure, ${EX_PKG_DISABLED}, ${EX_PKG_FINISHED}, and ${EX_PKG_NAMES} set post-return.

#

ex_pkg_unfold_depends() {

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

		_restart_recursive="${4}" _test_finished="${5}"		\

		_pkg_name="" _restartfl=0;

	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

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

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

		elif [ "${_test_finished:-1}" -eq 1 ]\

		&&   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

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

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

		fi;

	done;

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

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

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

};

#

# ex_pkg_unfold_rdepends() - unfold list of package names into reverse dependency-expanded set of complete, disabled, finished, and outstanding package names

# @_group_name:		build group name

# @_pkg_names:		list of package names

# @_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.)

# @_test_finished:	only exclude disabled packages from ${EX_PKG_NAMES} (0,) split finished packages into ${EX_PKG_FINISHED}

#

# Return:		zero (0) on success, non-zero (>0) on failure, ${EX_PKG_DISABLED}, ${EX_PKG_FINISHED}, and ${EX_PKG_NAMES} set post-return.

#

ex_pkg_unfold_rdepends() {

	local	_group_name="${1}" _pkg_names="${2}" _restart="${3}" _test_finished="${4}"	\

		_pkg_depends="" _pkg_name="" _pkg_name_depend="" _pkg_rdepends="" _restartfl=0;

	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

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

				elif [ "${_test_finished:-1}" -eq 1 ]\

				&&   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

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

				elif [ "${_test_finished:-1}" -eq 0 ]\

				||   ! 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;

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

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

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

};

# vim:filetype=sh textwidth=0