#!/bin/sh

#

{

. ./build.subr;

parse_args_into_vars "${0}" build-scripts,build-steps,help,tarball "${@}";

[ -n "${ARG_HELP}" ] && { exec cat build.usage; } || . ./build.vars;

clear_env_with_except HOME PATH SHELL TERM USER;

check_path_vars PREFIX PREFIX_NATIVE WORKDIR;

check_prereqs git make mktemp openssl sed sort tar tr wget;

log_msg info "Build started by ${BUILD_USER:=${USER}}@${BUILD_HNAME:=$(hostname)} at ${BUILD_DATE:=$(date %Y-%m-%d-%H-%M-%S)}.";

log_env_vars ${LOG_ENV_VARS};

(mkdir -p ${PREFIX} ${PREFIX_NATIVE} ${PREFIX_TARGET} ${WORKDIR};

BUILD_NFINI=${BUILD_NSKIP:=${BUILD_NFAIL:=${BUILD_NBUILT:=0}}};

for BUILD_LVL in 0 1 2 3; do

	for BUILD_SCRIPT_FNAME in ${BUILD_LVL}[0-9][0-9].*.build; do

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

		&& [ "${ARG_BUILD_SCRIPTS}" != "ALL" ]\

		&& ! match_list "${ARG_BUILD_SCRIPTS}"	\

				, "${BUILD_SCRIPT_FNAME}"; then

			log_msg info "Skipped build script \`${BUILD_SCRIPT_FNAME}' (--build-scripts policy.)";

			continue;

		elif [ ! -f ${BUILD_SCRIPT_FNAME} ]; then

			log_msg info "Build script \`${BUILD_SCRIPT_FNAME}' non-existent or not a file.";

			continue;

		else

			unset BUILD_SCRIPT_RC; : $((BUILD_NBUILT+=1));

			if [ "x${ARG_BUILD_SCRIPTS}" != "xALL" ]\

			&& is_build_script_done finish "${BUILD_SCRIPT_FNAME%.build}"; then

				log_msg info "Skipped build script \`${BUILD_SCRIPT_FNAME}' (already built.)";

					: $((BUILD_NSKIP+=1)); BUILD_SCRIPT_RC=0; continue;

			fi;

			log_msg info "Invoking build script${ARG_BUILD_SCRIPTS:+ (forcibly)} \`${BUILD_SCRIPT_FNAME}'${ARG_BUILD_STEPS:+ at build step(s) ${ARG_BUILD_STEPS}}.";

			(set -o errexit -- $(split . ${BUILD_SCRIPT_FNAME%%.build*});	\

			 SCRIPT_FNAME=${BUILD_SCRIPT_FNAME};				\

			 SCRIPT_NAME=${SCRIPT_FNAME%%.build*};				\

			 export CFLAGS="$(eval echo \${CFLAGS_LVL${BUILD_LVL}})";	\

			 export PREFIX_LVL="$(eval echo \${PREFIX_LVL${BUILD_LVL}})";	\

			 _PWD=$(pwd); cd ${WORKDIR};					\

			 for SCRIPT_SOURCE in build.subr ${SCRIPT_NAME}.vars		\

					${BUILD_SCRIPT_FNAME}; do			\

			 	[ -r ${_PWD}/${SCRIPT_SOURCE} ] &&			\

					 . ${_PWD}/${SCRIPT_SOURCE};			\

			 done);

			case ${BUILD_SCRIPT_RC:=${?}} in

			0) log_msg succ "Finished build script \`${BUILD_SCRIPT_FNAME}'.";

				: $((BUILD_NFINI+=1)); continue; ;;

			*) log_msg fail "Build failed in build script \`${BUILD_SCRIPT_FNAME}' (last return code ${BUILD_SCRIPT_RC}.).";

				: $((BUILD_NFAIL+=1)); break; ;;

			esac;

		fi;

	done;

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

		break;

	fi;

done;

log_msg info "${BUILD_NFINI} finished, ${BUILD_NSKIP} skipped, and ${BUILD_NFAIL} failed builds in ${BUILD_NBUILT} build script(s).";

if [ $(( ${BUILD_NFINI} + ${BUILD_NSKIP} )) -ge 0 ]\

&& [ ${BUILD_NFAIL} -eq 0 ]\

&& [ ${ARG_TARBALL:-0} -eq 1 ]; then

	log_msg info "Building distribution tarball.";

	(cd ${PREFIX};

	DISTRIB_FNAME=midipix.${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE}.tar.bz2;

	PREFIX_BASENAME=${PREFIX_NATIVE##*/}; WORKDIR_BASENAME=${WORKDIR##*/};

	rm_if_exists -m ${PREFIX_BASENAME}/lib.bak; rm_if_exists ${DISTRIB_FNAME};

	tar -C ${PREFIX_BASENAME}/lib -cpf - . | tar -C ${PREFIX_BASENAME}/lib.bak -xpf -;

	(cd native/lib &&

	 find . -maxdepth 1 -type l				\

	 	-exec sh -c 'dest=$(readlink -- "$0") && rm -- "$0" && ln -- "$dest" "$0"' {} \;);

	 wait;

	 find .	-maxdepth 2 -type d				\

	 	-not -path .					\

	 	-not -path ./${WORKDIR_BASENAME}		\

	 	-not -path ./${WORKDIR_BASENAME}/\*		\

	 	-not -path ./${PREFIX_BASENAME}			\

	 	-not -path ./${PREFIX_BASENAME}/lib.bak		|\

	 tar -T - -cpf - | bzip2 -9c - > ${DISTRIB_FNAME}

	 rm -rf ${PREFIX_BASENAME}/lib;

	 mv ${PREFIX_BASENAME}/lib.bak ${PREFIX_BASENAME}/lib); wait;

fi;

exit ${BUILD_SCRIPT_RC})} 2>&1 | tee build.log;

# vim:filetype=sh