#

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

#

pkgtoolp_init_args() {

	local _rc=0; _status="";

	if [ "$((${ARG_INFO:-0} + ${ARG_RDEPENDS:-0} + ${ARG_SHELL:-0} + ${ARG_TARBALL:-0}))" -gt 1 ]; then

		cat etc/pkgtool.usage; _rc=1; _status="Error: only one of -i, -r, -s, or -t must be specified.";

	elif [ "$((${ARG_INFO:-0} + ${ARG_RDEPENDS:-0} + ${ARG_SHELL:-0} + ${ARG_TARBALL:-0}))" -eq 0 ]\

	&&   [ -z "${ARG_RESTART_AT}" ]\

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

		cat etc/pkgtool.usage; _rc=1; _status="Error: one of -i, -r, -s, or -t must be specified.";

	else	_rc=0;

	fi; return "${_rc}";

};

pkgtoolp_init_env() {

	local _fname="" _rc=0; _status="";

	if ! cd "${0%/*}"; then

		printf "Error: failed to change working directory to \`${0%/*}'." >&2; exit 1;

	elif ! umask 022; then

		printf "Error: failed to set umask(2).\n" >&2; exit 1;

	else	for _fname in $(find subr -name *.subr); do

			if ! . "${_fname}"; then

				printf "Error: failed to source \`%s'.\n" "${_fname}" >&2; exit 1;

			fi;

		done;

	fi; return "${_rc}";

};

pkgtoolp_init_getopts() {

	local _opt="" _shiftfl=0 _rc=0 OPTIND=0; _status=""; : ${ARCH:="nt64"}; : ${BUILD_KIND:="debug"};

	ARG_INFO=0; ARG_RESTART_AT=""; ARG_RDEPENDS=0; ARG_UPDATE_DIFF=0; ARG_SHELL=0; ARG_TARBALL=0;

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

		case "${1}" in

		--update-diff)

			ARG_UPDATE_DIFF=1; _shiftfl=1; ;;

		--restart-at)

			if [ "${#}" -lt 2 ]\

			|| [ -z "${2}" ]; then

				_rc=1; _status="Error: missing argument for option --restart-at.";

			else

				ARG_RESTART_AT="${2}"; _shiftfl=2;

			fi; ;;

		*)	_shiftfl=0; ;;

		esac;

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

			break;

		elif [ "${_shiftfl:-0}" -gt 0 ]; then

			shift "${_shiftfl}"; continue;

		elif getopts a:b:hirst _opt; then

			case "${_opt}" in

			a)	ARCH="${OPTARG}"; ;;

			b)	BUILD_KIND="${OPTARG}"; ;;

			h)	cat etc/pkgtool.usage; exit 0; ;;

			i)	ARG_INFO=1; ;;

			r)	ARG_RDEPENDS=1; ;;

			s)	ARG_SHELL=1; ;;

			t)	ARG_TARBALL=1; ;;

			*)	cat etc/pkgtool.usage; exit 1; ;;

			esac; shift $((${OPTIND}-1)); OPTIND=1;

		else	case "${1}" in

			*=*)	rtl_set_var_unsafe "${1%%=*}" "${1#*=}"; ;;

			*)	if [ -n "${PKGTOOL_PKG_NAME:-}" ]; then

					_rc=1; _status="Error: more than one package name specified.";

				else

					PKGTOOL_PKG_NAME="${1}";

				fi; ;;

			esac; shift;

		fi;

	done;

	if [ "${_rc}" -eq 0 ]; then

		if [ -z "${PKGTOOL_PKG_NAME:-}" ]; then

			_rc=1; _status="Error: missing package name.";

		else	export PKGTOOL_PKG_NAME;

		fi;

	fi; return "${_rc}";

};

pkgtoolp_init_getopts_help() {

	local _opt="";

	while getopts a:b:hirst _opt 2>/dev/null; do

	case "${_opt}" in

	h)	cat etc/pkgtool.usage; exit 0; ;;

	esac; done; shift $((${OPTIND}-1));

};

pkgtoolp_init_prereqs() {

	if ! rtl_check_prereqs \

			awk bzip2 cat chmod cp date find grep hostname mkdir	\

			mktemp mv paste printf readlink rm sed sort tar test	\

			touch tr uniq; then

		printf "%s\n" "${_status}" >&2; exit 1;

	elif ! (FNAME="$(mktemp)" && { trap "rm -f \"\${FNAME}\"" EXIT;		\

			sed -i'' -e '' "${FNAME}" >/dev/null 2>&1; }); then

		printf "Error: sed(1) in \${PATH} does not support the \`-i' option.\n" >&2; exit 1;

	fi;

};

pkgtool_init() {

	local _fname="" _rc=0; _status="";

	if ! pkgtoolp_init_env			\

	|| ! pkgtoolp_init_getopts_help "${@}"	\

	|| ! pkgtoolp_init_prereqs		\

	|| ! pkgtoolp_init_getopts "${@}"	\

	|| ! ex_pkg_load_vars			\

	|| ! pkgtoolp_init_args; then

		_rc=1; _status="${_status}";

	fi; return "${_rc}";

};

# vim:filetype=sh