#!/bin/sh

# Copyright (c) 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>

#

. ./build.subr;

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

case ${1} in

-c)	ARG_CLEAN=1; ;;

-nd)	ARG_NO_DOWNLOAD=1; ;;

-pt)	ARG_PEDANTIC=1; ;;

-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; ;;

-x)	set -o xtrace; ;;

-X)	set -o xtrace; ARG_DEBUG_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 ${CLEAR_ENV_VARS_EXCEPT};

check_path_vars ${CHECK_PATH_VARS}; check_prereqs ${PREREQ_CMDS};

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

update_build_status build_start; build_times_init;

trap clean_build_status HUP INT TERM USR1 USR2;

{(

log_msg info "Build started by ${BUILD_USER:=${USER}}@${BUILD_HNAME:=$(hostname)} at ${BUILD_DATE_START}.";

log_env_vars ${LOG_ENV_VARS}; [ ${ARG_CLEAN:-0} -eq 1 ] && clean_prefix;

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_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}.).";

				if [ ${ARG_DEBUG_TARBALL:-0} -eq 1 ]; then

					log_msg info "-X specified, creating debug tarball.";

					SCRIPT_NAME=${BUILD_SCRIPT_FNAME%%.build};

					SCRIPT_NAME=${SCRIPT_NAME#*.};

					SCRIPT_NAME=$(echo "${SCRIPT_NAME}" | tr a-z A-Z);

					if [ -z ${PKG_SUBDIR=$(get_var_unsafe PKG_${SCRIPT_NAME}_SUBDIR)} ]; then

						PKG_URL=$(get_var_unsafe PKG_${SCRIPT_NAME}_URL);

						PKG_FNAME=${PKG_URL##*/};

					 	PKG_SUBDIR=${PKG_FNAME%%.tar*};

					fi;

					BUILD_DEBUG_TARBALL_FNAME=${PREFIX}/midipix-debug-${BUILD_USER}@${BUILD_HNAME}_$(date %Y-%m-%d-%H-%M-%S).tar.xz;

					tar -C ${PREFIX} -cJp				\

						-f ${BUILD_DEBUG_TARBALL_FNAME}		\

						build.log $(cd ${PREFIX} &&		\

							find ${WORKDIR#${PREFIX}/}	\

								-mindepth 1 -maxdepth 1	\

								-type d -iname ${PKG_SUBDIR}-*);

					log_msg info "Please upload ${BUILD_DEBUG_TARBALL_FNAME} and provide an URL to it in <irc://irc.freenode.net/midipix>.";

				fi;

				: $((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_times_get; log_msg info "Build time: ${BUILD_TIMES_HOURS} hour(s), ${BUILD_TIMES_MINUTES} minute(s), and ${BUILD_TIMES_SECS} second(s).";

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

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

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

	update_build_status build_finish tarball_start;

	log_msg info "Building distribution tarball...";

	(cd ${PREFIX}; PREFIX_BASENAME=${PREFIX_NATIVE##*/};

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

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

	log_msg info "Backed up ${PREFIX_BASENAME}/lib.";

	(cd native/lib &&

	 find . -maxdepth 1 -type l							\

	 	-exec sh -c 'DEST=$(readlink -- "${0}") &&				\

			rm -f -- "${0}" && ln -- "${DEST}" "${0}"' {} \;); wait;

	 log_msg info "Converted symbolic links in ${PREFIX_BASENAME}/lib to hard links.";

	TARBALL_FNAME=${TARBALL_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.tar.xz;

	tar -cJpf ${TARBALL_FNAME}							\

		$(find_with_no_paths "${TARBALL_EXCLUDE_PATHS} native/lib.bak" .	\

			-mindepth 1 -maxdepth 2 -type d);

	 rm -rf ${PREFIX_BASENAME}/lib; mv ${PREFIX_BASENAME}/lib.bak ${PREFIX_BASENAME}/lib);

	wait; log_msg info "Finished building distribution tarball.";

	update_build_status tarball_finish;

fi;

update_build_status finish;

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

# vim:filetype=sh