#

# set +o errexit -o noglob is assumed.

#

pkgtoolp_init_defaults() {

	: ${ARCH:="nt64"}; : ${BUILD:="debug"}; : ${PKG_NAME:=""};

	: ${BUILD_WORKDIR:=""}; : ${PREFIX=""};

	ARG_RESTART_AT=""; ARG_UPDATE_DIFF=0;

};

pkgtoolp_init_env() {

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

	if ! umask 022; then

		printf "Error: failed to setup environment.\n"; exit 1;

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

			if ! . "${_fname}"; then

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

			fi;

		done; fi;

	return "${_rc}";

};

pkgtoolp_init_getopts() {

	local _opt="" _shiftfl=0 _rc=0 OPTIND=0; _status="";

	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:C:D:Fhp:Pr:R _opt; then

			case "${_opt}" in

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

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

			h)	pkgtoolp_usage; exit 0; ;;

			*)	pkgtoolp_usage; exit 1; ;;

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

		else

			break;

		fi;

	done;

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

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

		case "${1}" in

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

		*)	if [ "${#}" -ne 1 ]; then

				_rc=1; _status="Error: invalid argument \`${1}'.";

			fi; break; ;;

		esac; shift; done;

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

			if [ "${#}" -ne 1 ]\

			&& [ -z "${PKG_NAME}" ]; then

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

			elif [ "${#}" -eq 1 ]; then

				PKG_NAME="${1}";

			fi;

		fi;

	fi;

	return "${_rc}";

};

pkgtoolp_init_prereqs() {

	local _cmd="" _cmds_missing="" _rc=0; _status="";

	for _cmd in	\

			awk bunzip2 cat chmod cmake cp date find flock g++	\

			gcc git grep gunzip gzip hostname install kill		\

			ln lzip make mkdir mkfifo mv paste patch perl		\

			pgrep pkill printf readlink rm sed seq sha256sum	\

			sort stat tail tar test touch tr wget xz zip; do

		if ! which "${_cmd}" >/dev/null 2>&1; then

			_cmds_missing="${_cmds_missing:+${_cmds_missing} }${_cmd}";

		fi;

	done;

	if [ -n "${_cmds_missing}" ]; then

		_rc=1; _status="Error: missing prerequisite package(s): ${_cmds_missing}";

	elif ! awk -V 2>/dev/null | grep -q "^GNU Awk "; then

		_rc=1; _status="Error: awk(1) in \$PATH must be GNU Awk.";

	elif ! sed --version 2>/dev/null | grep -q "^GNU sed "; then

		_rc=1; _status="Error: sed(1) in \$PATH must be GNU sed.";

	fi;

	return "${_rc}";

};

pkgtoolp_init_vars() {

	local _rc=0; _status="";

	if ! rtl_lmatch "${ARCH}" "nt32 nt64"; then

		_rc=1; _status="Error: invalid architecture \`${ARCH}'.";

	elif ! rtl_lmatch "${BUILD}" "debug release"; then

		_rc=1; _status="Error: unknown build type \`${BUILD}'.";

	else	case "${ARCH}" in

		nt32)	DEFAULT_TARGET="i686-nt32-midipix"; ;;

		nt64)	DEFAULT_TARGET="x86_64-nt64-midipix"; ;;

		esac;

		rtl_fileop source_opt							\

			"${HOME}/midipix_build.vars" "${HOME}/.midipix_build.vars"	\

			../midipix_build.vars ./midipix.env;

		if [ -z "${PREFIX}" ]; then

			_rc=1; _status="Error: \${PREFIX} empty or unset.";

		fi; fi;

	return "${_rc}";

};

pkgtoolp_usage() {

	echo "usage: ./pkgtool.sh [-a nt32|nt64] [-b debug|release] name" >&2;

};

pkgtool_init() {

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

	if ! pkgtoolp_init_env			\

	|| ! pkgtoolp_init_defaults		\

	|| ! pkgtoolp_init_getopts "${@}"	\

	|| ! pkgtoolp_init_prereqs		\

	|| ! pkgtoolp_init_vars; then

		_rc="${?}"; rtl_log_msg fail "${_status}"; exit "${_rc}";

	elif [ -n "${_status}" ]; then

		rtl_log_msg info "${_status}"; exit 0;

	else

		return "${_rc}";

	fi;

};

# vim:filetype=sh