#!/bin/sh

#

{

. ./build.subr;

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

case ${1} in

-r)	[ -n "${ARG_RESTART_SCRIPT}" ] && exec cat build.usage;

	match_any "${2}" :								\

		&& { ARG_RESTART_SCRIPT="${2%%:*}"; ARG_RESTART_SCRIPT_AT="${2##*:}"; }	\

		|| { ARG_RESTART_SCRIPT="${2}"; ARG_RESTART_SCRIPT_AT=ALL; };

	shift; ;;

-t)	[ ${ARG_TARBALL:-0} -eq 1 ] && exec cat build.usage;

	ARG_TARBALL=1; ;;

*=*)	set_var_unsafe "$(get_prefix_lrg "${1}" =)"					\

			"$(get_postfix "${1}" =)"; ;;

*)	exec cat build.usage; ;;

esac; shift; done; . ./build.vars;

clear_env_with_except HOME PATH SHELL TERM USER;

check_path_vars PREFIX PREFIX_NATIVE WORKDIR;

check_prereqs git make mktemp openssl patch 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};

touch ${PREFIX}/BUILD_IN_PROGRESS ${BUILD_PROGRESS_FNAME:=${PREFIX}/BUILD_STARTED_AT_${BUILD_DATE}};

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

BUILD_SECS=$(command date +%s);

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_RESTART_SCRIPT}" ]					\

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

		&& ! match_list "${ARG_RESTART_SCRIPT}"					\

				, "${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 [ "${ARG_RESTART_SCRIPT}" != ALL ]\

			&& 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${ARG_RESTART_SCRIPT:+ (forcibly)} \`${BUILD_SCRIPT_FNAME}'${ARG_RESTART_SCRIPT_AT:+ at build step ${ARG_RESTART_SCRIPT_AT}}.";

			(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			\

			 	[ -f ${_PWD}/${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).";

: $((BUILD_SECS=$(command date +%s)-${BUILD_SECS}));

: $((BUILD_HOURS=${BUILD_SECS}/3600));

: $((BUILD_MINUTES=(${BUILD_SECS}%3600)/60));

: $((BUILD_SECS=(${BUILD_SECS}%3600)%60));

log_msg info "Build time: ${BUILD_HOURS} hour(s), ${BUILD_MINUTES} minute(s), and ${BUILD_SECS} second(s).";

[ -f ${BUILD_PROGRESS_FNAME} ] && rm -f ${BUILD_PROGRESS_FNAME};

touch ${BUILD_FINISH_FNAME:=${PREFIX}/BUILD_FINISHED_AT_$(date %Y-%m-%d-%H-%M-%S)}	\

	${TARBALL_PROGRESS_FNAME:=${PREFIX}/TARBALL_STARTED_AT_$(date %Y-%m-%d-%H-%M-%S)};

ln -sf ${BUILD_FINISH_FNAME} ${PREFIX}/BUILD_FINISHED_AT;

# rotate BUILD_FINISH_FNAME files

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 ./src/midipix_build						\

	 	-not -path ./src/midipix_build/\*					\

	 	-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;

	# rotate tarballs

fi;

[ -f ${TARBALL_PROGRESS_FNAME} ] && rm -f ${TARBALL_PROGRESS_FNAME};

[ -f BUILD_IN_PROGRESS ] && rm -f BUILD_IN_PROGRESS;

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

# vim:filetype=sh