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#
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# set +o errexit -o noglob -o nounset is assumed.
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#
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buildp_init_args() {
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	local _group="" _last_pkg="" _pkg_names_unknown="" _rc=0; _status="";
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	if [ -z "${BUILD_HNAME:-}" ]\
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	&& ! BUILD_HNAME="$(hostname)"; then
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		_rc=1; _status="Error: failed to obtain hostname.";
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	elif [ "${ARG_DUMP_ON_ABORT:-0}" -eq 1 ]\
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	&& [ "${ARG_RELAXED:-0}" -eq 1 ]; then
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		_rc=1; _status="Error: --dump-on-abort excludes -R.";
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	elif [ "${ARG_AS_NEEDED:-0}" -eq 1 ]\
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	&& [ -e "${PREFIX}/build.gitref" ]\
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	&& [ "$(git rev-parse HEAD)" = "$(cat "${PREFIX}/build.gitref")" ]; then
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		_rc=0; _status="Git repository has not changed since last build and --as-needed was specified.";
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	else	case "${ARG_FETCH_FORCE}" in
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		ipv4)	DEFAULT_GIT_ARGS="$(rtl_lconcat "-4" "${DEFAULT_GIT_ARGS}")";
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			DEFAULT_WGET_ARGS="$(rtl_lconcat "-4" "${DEFAULT_GIT_ARGS}")"; ;;
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		ipv6)	DEFAULT_GIT_ARGS="$(rtl_lconcat "-6" "${DEFAULT_GIT_ARGS}")";
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			DEFAULT_WGET_ARGS="$(rtl_lconcat "-6" "${DEFAULT_GIT_ARGS}")"; ;;
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		esac;
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		case "${ARG_RESTART}" in
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		\*\*\*[a-zA-Z]*)
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				ARG_RESTART="${ARG_RESTART#\*\*\*}"; ARG_RESTART_RECURSIVE=3; ;;
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		\*\*[a-zA-Z]*)	ARG_RESTART="${ARG_RESTART#\*\*}"; ARG_RESTART_RECURSIVE=2; ;;
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		\*[a-zA-Z]*)	ARG_RESTART="${ARG_RESTART#\*}"; ARG_RESTART_RECURSIVE=1; ;;
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		ALL)		ARG_RESTART_AT=ALL; ARG_RESTART_RECURSIVE=2; ;;
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		LAST)		ARG_RESTART_AT=ALL; ARG_RESTART_RECURSIVE=0;
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				if [ -n "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]\
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				&& [ -e "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]; then
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					_last_pkg="$(cat "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}")";
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					rtl_fileop rm "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}";
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					rtl_state_clear "${BUILD_WORKDIR}" "${_last_pkg}";
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					ARG_RESTART="${_last_pkg}";
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				else
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					_rc=1; _status="Error: cannot rebuild last failed package.";
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				fi; ;;
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		esac;
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		if [ "${_rc:-0}" -eq 0 ]; then
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			case "${ARG_RESTART}" in
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			*:*)		ARG_RESTART_AT="${ARG_RESTART#*:}"; ARG_RESTART="$(rtl_llift "${ARG_RESTART%%:*}" "," " ")"; ;;
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			*)		ARG_RESTART="$(rtl_llift "${ARG_RESTART}" "," " ")"; ARG_RESTART_AT=ALL; ;;
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			esac;
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			if ! ex_pkg_load_groups; then
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				_rc=1; _status="Error: failed to load build groups.";
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			else	if ! rtl_lmatch "${ARG_DIST:-}" "rpm" ","\
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				&& [ -z "${ARG_DUMP_IN:-}" ]\
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				&& [ "${ARG_DUMP_ON_ABORT:-0}" -eq 0 ]; then
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					EX_PKG_BUILD_GROUPS="$(rtl_lfilter "${EX_PKG_BUILD_GROUPS}" "host_deps_rpm")";
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				fi;
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				if [ -z "${BUILD_GROUPS}" ]; then
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					BUILD_GROUPS="${EX_PKG_BUILD_GROUPS}";
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				else	for _group in ${BUILD_GROUPS}; do
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						if ! rtl_lmatch "${EX_PKG_BUILD_GROUPS}" "${_group}"; then
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							_rc=1; _status="Error: unknown build group \`${_group}'."; break;
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						fi;
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					done;
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				fi;
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				if [ "${_rc:-0}" -eq 0 ]; then
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					if [ -n "${ARG_DIST}" ]; then
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						BUILD_GROUPS="$(rtl_lconcat "$(rtl_lfilter "${BUILD_GROUPS}" "dist")" "dist")";
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					fi;
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					if [ -n "${ARG_RESTART}" ] && ! rtl_lmatch "${ARG_RESTART}" "ALL LAST"; then
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						for _pkg_name in ${ARG_RESTART}; do
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							if ! ex_pkg_find_package "${BUILD_GROUPS}" "${_pkg_name}" >/dev/null; then
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								_pkg_names_unknown="$(rtl_lconcat "${_pkg_names_unknown}" "${_pkg_name}")";
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							fi;
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						done;
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						case "$(rtl_llength "${_pkg_names_unknown}")" in
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						0)	;;
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						1)	_rc=1; _status="Error: unknown package \`${_pkg_names_unknown}'."; ;;
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						*)	_rc=1; _status="Error: unknown packages: $(rtl_subst "${_pkg_names_unknown}" " " ", ")"; ;;
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						esac;
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					fi;
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					if [ "${_rc}" -eq 0 ]; then
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						case "${ARG_VERBOSE:-0}" in
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						0)	rtl_fileop_set_log 0; rtl_log_set_lvl 0; ;;
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						1)	rtl_fileop_set_log 0; rtl_log_set_lvl 2; ;;
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						2)	rtl_fileop_set_log 0; rtl_log_set_lvl 2; ;;
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						3)	rtl_fileop_set_log 0; rtl_log_set_lvl 2; ;;
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						4)	rtl_fileop_set_log 1; rtl_log_set_lvl 3; ;;
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						*)	_rc=1; _status="Error: invalid verbosity level (max. -vvvv)"; ;;
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						esac;
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					fi;
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				fi;
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			fi;
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		fi;
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	fi; return "${_rc}";
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};
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buildp_init_env() {
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	local _fname="" _rc=0; _status="";
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	if ! cd "${0%/*}"; then
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		printf "Error: failed to change working directory to \`${0%/*}'." >&2; exit 1;
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	elif ! umask 022; then
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		printf "Error: failed to set umask(2).\n" >&2; exit 1;
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	elif ! BUILD_USER="$(id -nu)"; then
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		printf "Error: failed to obtain username." >&2; exit 1;
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	else	for _fname in $(find subr -name *.subr); do
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			if ! . "${_fname}"; then
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				printf "Error: failed to source \`%s'.\n" "${_fname}"; exit 1;
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			fi;
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		done;
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	fi; return "${_rc}";
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};
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buildp_init_files() {
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	local _log_last_fname="" _log_last_num=1 _rc=0; _status=""
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	if ! rtl_fileop mkdir "${BUILD_DLCACHEDIR}" "${BUILD_WORKDIR}"\
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	|| rtl_lmatch "${ARG_DIST}" "rpm" ","\
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	&& ! rtl_fileop mkdir "${PREFIX_RPM}"; then
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		_rc=1; _status="Error: cannot create build directories.";
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	elif [ -e "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then
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		_rc=1; _status="Error: another build targeting this architecture and build type is currently in progress.";
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	elif ! rtl_clean_env "${DEFAULT_CLEAR_ENV_VARS_EXCEPT}"; then
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		_rc=1; _status="Error: failed to clean environment.";
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	elif ! rtl_check_path_vars "${DEFAULT_CHECK_PATH_VARS}"; then
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		_rc=1; _status="${_status}";
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	else	touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
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		if [ -e "${DEFAULT_BUILD_LOG_FNAME}" ]; then
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			while [ -e "${DEFAULT_BUILD_LOG_FNAME}.${_log_last_num}" ]; do
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				: $((_log_last_num+=1));
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			done;
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			_log_last_fname="${DEFAULT_BUILD_LOG_FNAME}.${_log_last_num}";
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			rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME}" "${_log_last_fname}";
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			rtl_fileop ln_symbolic "${_log_last_fname}" "${DEFAULT_BUILD_LOG_LAST_FNAME}";
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		fi;
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		rtl_fileop touch "${DEFAULT_BUILD_LOG_FNAME}"; rtl_log_set_fname "${DEFAULT_BUILD_LOG_FNAME}";
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		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "prefix" ","; then
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			trap "rm -f \"${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}\" 2>/dev/null; rtl_log_msg fatalexit \"Build aborted.\"" HUP INT TERM USR1 USR2;
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			rtl_log_msg info "-C prefix specified, cleaning prefix...";
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			for _pname in ${DEFAULT_CLEAR_PREFIX_PATHS}; do
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				if ! rtl_fileop rm "${PREFIX}/${_pname}"; then
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					_rc=1; _status="Error: failed to remove \`${PREFIX}/${_pname}'."; break;
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				fi;
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			done;
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			trap - HUP INT TERM USR1 USR2;
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		fi;
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		export PATH="${PREFIX}/bin${PATH:+:${PATH}}";
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	fi;
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	return "${_rc}";
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};
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buildp_init_getopts() {
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	local _arg="" _opt="" _rc=0 _shiftfl=0 OPTIND=0; _status="";
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	: ${ARCH:="nt64"}; : ${BUILD_KIND:="debug"};
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	ARG_AS_NEEDED=0; ARG_CLEAN_BUILDS=""; ARG_DEBUG_MINIPIX=0; ARG_DIST=""; ARG_DUMP_IN="";
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	ARG_DUMP_ON_ABORT=0; ARG_FETCH_FORCE=0; ARG_PARALLEL=1; ARG_RELAXED=0; ARG_RESTART="";
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	ARG_RESTART_AT=""; ARG_RESTART_RECURSIVE=""; ARG_VERBOSE=0;
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	while [ "${#}" -gt 0 ]; do
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		case "${1}" in
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		--as-needed)	ARG_AS_NEEDED=1; _shiftfl=1; ;;
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		--dump-in)	if [ "${#}" -ge 2 ]; then
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					ARG_DUMP_IN="${2}"; ARG_DUMP_ON_ABORT=1; _shiftfl=2;
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				else
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					_rc=1; _status="Error: missing argument to option --dump-in.";
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				fi; ;;
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		--dump-on-abort)
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				ARG_DUMP_ON_ABORT=1; _shiftfl=1; ;;
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		--debug-minipx)	ARG_DEBUG_MINIPIX=1; _shiftfl=1; ;;
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		-v*)		_opt="${1#-}"; while [ -n "${_opt}" ]; do
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					: $((ARG_VERBOSE+=1)); _opt="${_opt#?}";
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				done; _shiftfl=1; ;;
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		*)		_shiftfl=0; ;;
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		esac;
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		if [ "${_rc}" -ne 0 ]; then
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			break;
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		elif [ "${_shiftfl}" -gt 0 ]; then
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			shift "${_shiftfl}"; continue;
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		elif getopts a:b:C:D:Fhp:Pr:R _opt; then
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			case "${_opt}" in
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			a)	ARCH="${OPTARG}"; ;;
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			b)	BUILD_KIND="${OPTARG}"; ;;
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			C)	ARG_CLEAN_BUILDS="${OPTARG}"; ;;
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			D)	ARG_DIST="${OPTARG}"; ;;
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			F)	ARG_FETCH_FORCE=1; ;;
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			h)	cat etc/build.usage; exit 0; ;;
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			p)	ARG_PARALLEL="${OPTARG}"; ;;
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			P)	ARG_PARALLEL="auto";
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				if [ -n "${2:-}" ]\
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				&& rtl_isnumber "${2}"; then
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					_rc=1; _status="Error: maximum parallelisation job count is set with the \`-p jobs' option."; break
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				fi; ;;
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			r)	ARG_RESTART="${OPTARG}"; ;;
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			R)	ARG_RELAXED=1; ;;
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			*)	cat etc/build.usage; exit 1; ;;
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			esac; shift $((${OPTIND}-1)); OPTIND=1;
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		else
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			break;
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		fi;
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	done;
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	if [ "${_rc:-0}" -eq 0 ]; then
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		while [ ${#} -gt 0 ]; do
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			if [ "${1#=}" != "${1}" ]; then
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				BUILD_GROUPS_INHIBIT_DEPS=1; _arg="${1#=}";
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			else
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				_arg="${1}";
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			fi;
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			case "${_arg}" in
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			*=*)		rtl_set_var_unsafe "${_arg%%=*}" "${_arg#*=}"; ;;
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			[^a-zA-Z]*)	_rc=1; _status="Error: build group names must start with [a-zA-Z] (in argument \`${_arg}'.)"; ;;
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			*[^_a-zA-Z]*)	_rc=1; _status="Error: build group names must not contain [^_a-zA-Z] (in argument \`${_arg}'.)"; ;;
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			*)		BUILD_GROUPS="$(rtl_lconcat "${BUILD_GROUPS}" "${_arg}")"; ;;
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			esac; shift;
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		done;
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		if [ "${_rc:-0}" -eq 0 ]; then
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			case "${ARG_PARALLEL}" in
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			auto)	if ! ARG_PARALLEL="$(rtl_get_cpu_count)"; then
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					_rc=1; _status="Error: failed to get CPU count.";
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				else
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					ARG_PARALLEL=$((${ARG_PARALLEL}/2));
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				fi; ;;
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			"")	ARG_PARALLEL=1; ;;
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			*)	if ! rtl_isnumber "${ARG_PARALLEL}"; then
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					_rc=1; _status="Error: invalid jobs count \`${ARG_PARALLEL}'.";
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				fi; ;;
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			esac;
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			if [ "${_rc:-0}" -eq 0 ]; then
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				DEFAULT_BUILD_CPUS="${ARG_PARALLEL}";
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			fi;
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		fi;
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	fi;
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	return "${_rc}";
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};
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buildp_init_getopts_help() {
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	local _opt="";
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	while getopts a:b:C:D:Fhp:Pr:R _opt 2>/dev/null; do
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	case "${_opt}" in
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	h)	cat etc/build.usage; exit 0; ;;
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	esac; done; shift $((${OPTIND}-1));
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};
Lucio Andrés Illanes Albornoz 11ef38
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buildp_init_prereqs() {
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	if ! rtl_check_prereqs \
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			awk bunzip2 bzip2 cat chmod cmake cp date find flock	\
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			g++ gcc git grep gunzip gzip hostname id install kill	\
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			ln lzip make mkdir mkfifo mktemp mv paste patch perl	\
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			pgrep pkill printf readlink rm sed sha256sum sort	\
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			stat tail tar test touch tr uniq wget xz zip; then
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		printf "%s\n" "${_status}" >&2; exit 1;
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	elif ! awk -V 2>/dev/null | grep -q "^GNU Awk "; then
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		printf "Error: awk(1) in \$PATH must be GNU Awk." >&2; exit 1;
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	elif ! (FNAME="$(mktemp)" && { trap "rm -f \"\${FNAME}\"" EXIT;		\
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			sed -i'' -e '' "${FNAME}" >/dev/null 2>&1; }); then
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		printf "Error: sed(1) in \${PATH} does not support the \`-i' option.\n" >&2; exit 1;
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	fi;
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};
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build_init() {
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	local _rc=0; _status="";
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	if ! buildp_init_env			\
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	|| ! buildp_init_getopts_help "${@}"	\
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	|| ! buildp_init_prereqs		\
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	|| ! buildp_init_getopts "${@}"		\
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	|| ! ex_pkg_load_vars			\
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	|| ! buildp_init_args			\
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	|| ! buildp_init_files; then
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		_rc=1; _status="${_status}";
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	fi; return "${_rc}";
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};
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Lucio Andrés Illanes Albornoz (arab, vxp) e2fea1
# vim:filetype=sh