#

# set +o errexit -o noglob is assumed.

#

buildp_init_args() {

	local _last_pkg=""; _status="";

	if [ "${ARG_AS_NEEDED:-0}" -eq 1 ]\

	&& [ -e "${PREFIX}/build.gitref" ]\

	&& [ "$(git rev-parse HEAD)" = "$(cat "${PREFIX}/build.gitref")" ]; then

		_status="Git repository has not changed since last build and --as-needed was specified.";

	fi;

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

		if [ "${ARG_RESTART#\*\*\*}" != "${ARG_RESTART}" ]; then

			ARG_RESTART="${ARG_RESTART#\*\*\*}"; ARG_RESTART_RECURSIVE=3;

		elif [ "${ARG_RESTART#\*\*}" != "${ARG_RESTART}" ]; then

			ARG_RESTART="${ARG_RESTART#\*\*}"; ARG_RESTART_RECURSIVE=2;

		elif [ "${ARG_RESTART#\*}" != "${ARG_RESTART}" ]; then

			ARG_RESTART="${ARG_RESTART#\*}"; ARG_RESTART_RECURSIVE=1;

		fi;

	fi;

	case "${ARG_RESTART}" in

	ALL)	ARG_RESTART_AT=ALL; ARG_RESTART_RECURSIVE=2; ;;

	LAST)	ARG_RESTART_AT=ALL; ARG_RESTART_RECURSIVE=0; ;;

	"")	;;

	*:*)	ARG_RESTART_AT="${ARG_RESTART#*:}"; ARG_RESTART="$(rtl_llift "${ARG_RESTART%%:*}" "," " ")"; ;;

	*)	ARG_RESTART="$(rtl_llift "${ARG_RESTART}" "," " ")"; ARG_RESTART_AT=ALL; ;;

	esac;

	if [ "${ARG_RESTART}" = "LAST" ]; then

		if [ -n "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]\

		&& [ -e "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]; then

			_last_pkg="$(cat "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}")";

			rtl_fileop rm "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}";

			rtl_state_clear "${BUILD_WORKDIR}" "${_last_pkg}";

			ARG_RESTART="${_last_pkg}";

		fi;

	fi;

	rtl_log_set_vnfo_lvl "${ARG_VERBOSE:-0}";

	case "${ARG_FETCH_FORCE}" in

	ipv4)	DEFAULT_GIT_ARGS="$(rtl_lconcat "-4" "${DEFAULT_GIT_ARGS}")";

		DEFAULT_WGET_ARGS="$(rtl_lconcat "-4" "${DEFAULT_GIT_ARGS}")"; ;;

	ipv6)	DEFAULT_GIT_ARGS="$(rtl_lconcat "-6" "${DEFAULT_GIT_ARGS}")";

		DEFAULT_WGET_ARGS="$(rtl_lconcat "-6" "${DEFAULT_GIT_ARGS}")"; ;;

	esac;

	return 0;

};

buildp_init_defaults() {

	local _rc=0; _status="";

	# Command-line arguments

	ARCH="nt64"; BUILD="debug";

	ARG_AS_NEEDED=0; ARG_CLEAN_BUILDS=""; ARG_DEBUG_MINIPIX=0; ARG_DIST="";

	ARG_FETCH_FORCE=0; ARG_PARALLEL=1; ARG_RELAXED=0; ARG_RESTART=""; ARG_VERBOSE=0;

	# Build parameters & state

	BUILD_DLCACHEDIR=""; BUILD_HNAME=""; BUILD_IS_PARENT=1; BUILD_GROUPS="";

	BUILD_GROUPS_INHIBIT_DEPS=0; BUILD_TARGET=""; BUILD_USER=""; BUILD_WORKDIR="";

	MIDIPIX_BUILD_PWD=""; PREFIX=""; PREFIX_RPM="";

	# Global defaults

	DEFAULT_BUILD_CPUS=1;

	DEFAULT_BUILD_LAST_FAILED_PKG_FNAME=""

	DEFAULT_BUILD_LOG_FNAME="";

	DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME="";

	DEFAULT_BUILD_STEPS="";

	DEFAULT_BUILD_VARS="";

	DEFAULT_CLEAR_PREFIX_PATHS="";

	DEFAULT_GIT_ARGS="";

	DEFAULT_GITROOT_HEAD="";

	DEFAULT_LOG_ENV_VARS="";

	DEFAULT_TARGET="";

	DEFAULT_WGET_ARGS="";

	return "${_rc}";

};

buildp_init_env() {

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

	if ! cd "$(dirname "${0}")" || ! 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}";

};

buildp_init_files() {

	local _log_last_fname="" _log_last_ts="" _rc=0; _status=""

	if ! rtl_fileop mkdir "${BUILD_DLCACHEDIR}" "${BUILD_WORKDIR}"\

	|| rtl_lmatch "${ARG_DIST}" "rpm" ","\

	&& ! rtl_fileop mkdir "${PREFIX_RPM}"; then

		_rc=1; _status="Error: cannot create build directories.";

	elif [ -e "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then

		_rc=1; _status="Error: another build targeting this architecture and build type is currently in progress.";

	elif ! rtl_clean_env "${DEFAULT_CLEAR_ENV_VARS_EXCEPT}"; then

		_rc=1; _status="Error: failed to clean environment.";

	elif ! rtl_check_path_vars "${DEFAULT_CHECK_PATH_VARS}"; then

		_rc=1; _status="Error: one or more variable containing pathname(s) contains whitespace character(s).";

	else

		touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";

		if [ -e "${DEFAULT_BUILD_LOG_FNAME}" ]; then

			_log_last_ts="$(stat -c %Y "${DEFAULT_BUILD_LOG_FNAME}")";

			_log_last_ts="$(awk 'BEGIN {printf(strftime("%Y-%m-%d-%H-%M-%S", '"${_log_last_ts}"'))}')";

			_log_last_fname="${DEFAULT_BUILD_LOG_FNAME}.${_log_last_ts}";

			rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME}" "${_log_last_fname}";

			rtl_fileop ln_symbolic "${_log_last_fname}" "${DEFAULT_BUILD_LOG_LAST_FNAME}";

		fi;

		rtl_fileop touch "${DEFAULT_BUILD_LOG_FNAME}";

		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "prefix" ","; then

			rtl_log_msg info "-C prefix specified, cleaning prefix...";

			for _pname in ${DEFAULT_CLEAR_PREFIX_PATHS}; do

				if ! rtl_fileop rm "${PREFIX}/${_pname}"; then

					_rc=1; _status="Error: failed to remove \`${PREFIX}/${_pname}'."; break;

				fi;

			done;

		fi;

		export PATH="${PREFIX}/bin${PATH:+:${PATH}}";

	fi;

	return "${_rc}";

};

buildp_init_getopts() {

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

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

		case "${1}" in

		--as-needed)	ARG_AS_NEEDED=1; _shiftfl=1; ;;

		--debug-minipx)	ARG_DEBUG_MINIPIX=1; _shiftfl=1; ;;

		-v*)		_opt="${1#-}"; while [ -n "${_opt}" ]; do

					: $((ARG_VERBOSE+=1)); _opt="${_opt#?}";

				done; _shiftfl=1; ;;

		*)		_shiftfl=0; ;;

		esac;

		if [ "${_shiftfl}" -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}"; ;;

			C)	ARG_CLEAN_BUILDS="${OPTARG}"; ;;

			D)	ARG_DIST="${OPTARG}"; ;;

			F)	ARG_FETCH_FORCE=1; ;;

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

			p)	ARG_PARALLEL="${OPTARG}"; ;;

			P)	ARG_PARALLEL="auto"; ;;

			r)	ARG_RESTART="${OPTARG}"; ;;

			R)	ARG_RELAXED=1; ;;

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

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

		else

			break;

		fi;

	done;

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

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

		if [ "${1#\*}" != "${1}" ]; then

			BUILD_GROUPS_INHIBIT_DEPS=1; _arg="${1#\*}";

		else

			_arg="${1}";

		fi;

		case "${_arg}" in

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

		[^a-zA-Z]*)	_rc=1; _status="Error: build group names must start with [a-zA-Z] (in argument \`${_arg}'.)"; ;;

		*[^_a-zA-Z]*)	_rc=1; _status="Error: build group names must not contain [^_a-zA-Z] (in argument \`${_arg}'.)"; ;;

		*)		BUILD_GROUPS="$(rtl_lconcat "${BUILD_GROUPS}" "${_arg}")"; ;;

		esac; shift; done;

	fi;

	return "${_rc}";

};

buildp_init_groups() {

	local _default_build_groups="" _fname="" _group="" _groups="" _rc=0; _status="";

	for _fname in $(find ./groups -name *.group | sort); do

		rtl_fileop source_opt "${_fname}";

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

			_group="${GROUP_TARGET}"; unset GROUP_TARGET;

		else

			_group="${_fname##*/}"; _group="${_group%.group}"; _group="${_group#*.}";

		fi;

		if ! rtl_lmatch "${_groups}" "${_group}"; then

			_groups="$(rtl_lconcat "${_groups}" "${_group}")";

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

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

					_default_build_groups="$(rtl_lconcat "${_default_build_groups}" "${_group}")";

				fi;

				unset GROUP_AUTO;

			else

				_default_build_groups="$(rtl_lconcat "${_default_build_groups}" "${_group}")";

			fi;

		fi;

	done;

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

	if ! rtl_lmatch "${ARG_DIST}" "rpm" ","; then

		_default_build_groups="$(rtl_lfilter "${_default_build_groups}" "host_deps_rpm")";

	fi;

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

		BUILD_GROUPS="${_default_build_groups}";

	fi;

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

		BUILD_GROUPS="$(rtl_lconcat "$(rtl_lfilter "${BUILD_GROUPS}" "dist")" "dist")";

	fi;

	for _group in ${BUILD_GROUPS}; do

		if ! rtl_lmatch "${_groups}" "${_group}"; then

			_rc=1; _status="Error: unknown build group \`${_group}'."; break;

		fi;

	done;

	return "${_rc}";

};

buildp_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}";

};

buildp_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}'.";

	elif [ -n "${ARG_PARALLEL}" ] &&  [ "${ARG_PARALLEL}" != "auto" ]\

	&&   ! rtl_isnumber "${ARG_PARALLEL}"; then

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

	else	case "${ARCH}" in

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

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

		esac;

		if [ -e "/proc/cpuinfo" ]; then

			DEFAULT_BUILD_CPUS="$(awk '/^processor/{cpus++} END{print cpus}' /proc/cpuinfo)";

			if [ "${ARG_PARALLEL}" = "auto" ]\

			&& [ "${DEFAULT_BUILD_CPUS}" -gt 1 ]; then

				ARG_PARALLEL=$((${DEFAULT_BUILD_CPUS}/2));

			fi;

		fi;

		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}";

};

build_init() {

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

	if ! buildp_init_env		\

	|| ! buildp_init_defaults	\

	|| ! buildp_init_getopts "${@}"	\

	|| ! buildp_init_prereqs	\

	|| ! buildp_init_vars		\

	|| ! buildp_init_groups		\

	|| ! buildp_init_args		\

	|| ! buildp_init_files; 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