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#!/bin/sh
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# Copyright (c) 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
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#
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. ./build.subr;
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while [ ${#} -gt 0 ]; do
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case ${1} in
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-c)	ARG_CLEAN=1; ;;
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-nd)	ARG_NO_DOWNLOAD=1; ;;
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-pt)	ARG_PEDANTIC=1; ;;
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-r)	[ -n "${ARG_RESTART_SCRIPT}" ] && exec cat build.usage;
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	match_any "${2}" :								\
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		&& { ARG_RESTART_SCRIPT="${2%%:*}"; ARG_RESTART_SCRIPT_AT="${2##*:}"; }	\
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		|| { ARG_RESTART_SCRIPT="${2}"; ARG_RESTART_SCRIPT_AT=ALL; };
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	shift; ;;
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-t)	[ ${ARG_TARBALL:-0} -eq 1 ] && exec cat build.usage || ARG_TARBALL=1; ;;
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-x)	set -o xtrace; ;;
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-X)	set -o xtrace; ARG_DEBUG_TARBALL=1; ;;
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*=*)	set_var_unsafe "$(get_prefix_lrg "${1}" =)"					\
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			"$(get_postfix "${1}" =)"; ;;
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*)	exec cat build.usage; ;;
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esac; shift; done;
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[ -f ${HOME}/midipix_build.vars ] && . ${HOME}/midipix_build.vars;
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[ -f ../midipix_build.vars ] && . ../midipix_build.vars;
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. ./build.vars;
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clear_env_with_except ${CLEAR_ENV_VARS_EXCEPT};
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check_path_vars ${CHECK_PATH_VARS}; check_prereqs ${PREREQ_CMDS};
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{(
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update_build_status build_start; build_times_init; trap "clean_build_status abort; exit 1" HUP INT TERM USR1 USR2;
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log_msg info "Build started by ${BUILD_USER:=${USER}}@${BUILD_HNAME:=$(hostname)} at ${BUILD_DATE_START}.";
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log_env_vars ${LOG_ENV_VARS}; [ ${ARG_CLEAN:-0} -eq 1 ] && clean_prefix;
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mkdir -p ${PREFIX} ${PREFIX_NATIVE} ${PREFIX_TARGET} ${WORKDIR};
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if [ -d ${PREFIX}/usr -o -f ${PREFIX}/usr -o -L ${PREFIX}/usr ]; then
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	rm -rf ${PREFIX}/usr;
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fi;
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ln -sf . ${PREFIX}/usr;
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if [ -d ${PREFIX_NATIVE}/usr -o -f ${PREFIX_NATIVE}/usr -o -L ${PREFIX_NATIVE}/usr ]; then
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	rm -rf ${PREFIX_NATIVE}/usr;
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fi;
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ln -sf . ${PREFIX_NATIVE}/usr;
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BUILD_NFINI=${BUILD_NSKIP:=${BUILD_NFAIL:=${BUILD_NBUILT:=0}}};
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for BUILD_LVL in 0 1 2 3; do
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	for BUILD_SCRIPT_FNAME in ${BUILD_LVL}[0-9][0-9].*.build; do
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		if [ -n "${ARG_RESTART_SCRIPT}" ]					\
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		&& [ "${ARG_RESTART_SCRIPT}" != "ALL" ]					\
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		&& ! match_list "${ARG_RESTART_SCRIPT}"					\
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				, "${BUILD_SCRIPT_FNAME}"; then
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			log_msg info "Skipped build script \`${BUILD_SCRIPT_FNAME}' (--build-scripts policy.)";
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			continue;
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		elif [ ! -f ${BUILD_SCRIPT_FNAME} ]; then
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			log_msg info "Build script \`${BUILD_SCRIPT_FNAME}' non-existent or not a file.";
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			continue;
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		else
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			unset BUILD_SCRIPT_RC; : $((BUILD_NBUILT+=1));
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			if [ "${ARG_RESTART_SCRIPT}" != ALL ]\
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			&& is_build_script_done finish "${BUILD_SCRIPT_FNAME%.build}"; then
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				log_msg info "Skipped build script \`${BUILD_SCRIPT_FNAME}' (already built.)";
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					: $((BUILD_NSKIP+=1)); BUILD_SCRIPT_RC=0; continue;
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			fi;
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			log_msg info "Invoking build script${ARG_RESTART_SCRIPT:+ (forcibly)} \`${BUILD_SCRIPT_FNAME}'${ARG_RESTART_SCRIPT_AT:+ at build step ${ARG_RESTART_SCRIPT_AT}}.";
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			(set -o errexit -- $(split . ${BUILD_SCRIPT_FNAME%%.build*});	\
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			 SCRIPT_FNAME=${BUILD_SCRIPT_FNAME};				\
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			 SCRIPT_NAME=${SCRIPT_FNAME%%.build*};				\
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			 export CFLAGS="$(eval echo \${CFLAGS_LVL${BUILD_LVL}})";	\
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			 export PREFIX_LVL="$(eval echo \${PREFIX_LVL${BUILD_LVL}})";	\
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			 _PWD=$(pwd); cd ${WORKDIR};					\
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			 for SCRIPT_SOURCE in build.subr ${SCRIPT_NAME}.vars		\
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					${BUILD_SCRIPT_FNAME}; do			\
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			 	[ -f ${_PWD}/${SCRIPT_SOURCE} ] &&			\
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					 . ${_PWD}/${SCRIPT_SOURCE};			\
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			 done);
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			case ${BUILD_SCRIPT_RC:=${?}} in
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			0) log_msg succ "Finished build script \`${BUILD_SCRIPT_FNAME}'.";
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				: $((BUILD_NFINI+=1)); continue; ;;
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			*) log_msg fail "Build failed in build script \`${BUILD_SCRIPT_FNAME}' (last return code ${BUILD_SCRIPT_RC}.).";
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				if [ ${ARG_DEBUG_TARBALL:-0} -eq 1 ]; then
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					log_msg info "-X specified, creating debug tarball.";
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					SCRIPT_NAME=${BUILD_SCRIPT_FNAME%%.build};
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					SCRIPT_NAME=${SCRIPT_NAME#*.};
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					SCRIPT_NAME=$(echo "${SCRIPT_NAME}" | tr a-z A-Z);
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					if [ -z ${PKG_SUBDIR=$(get_var_unsafe PKG_${SCRIPT_NAME}_SUBDIR)} ]; then
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						PKG_URL=$(get_var_unsafe PKG_${SCRIPT_NAME}_URL);
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						PKG_FNAME=${PKG_URL##*/};
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					 	PKG_SUBDIR=${PKG_FNAME%%.tar*};
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					fi;
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					BUILD_DEBUG_TARBALL_FNAME=${PREFIX}/midipix-debug-${BUILD_USER}@${BUILD_HNAME}_$(date %Y-%m-%d-%H-%M-%S).tar.xz;
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					tar -C ${PREFIX} -cJp				\
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						-f ${BUILD_DEBUG_TARBALL_FNAME}		\
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						build.log $(cd ${PREFIX} &&		\
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							find ${WORKDIR#${PREFIX}/}	\
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								-mindepth 1 -maxdepth 1	\
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								-type d -iname ${PKG_SUBDIR}-*);
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					log_msg info "Please upload ${BUILD_DEBUG_TARBALL_FNAME} and provide an URL to it in <irc://irc.freenode.net/midipix>.";
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				fi;
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				: $((BUILD_NFAIL+=1)); break; ;;
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			esac;
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		fi;
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	done;
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	if [ ${BUILD_SCRIPT_RC:-0} -ne 0 ]; then
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		break;
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	fi;
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done;
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log_msg info "${BUILD_NFINI} finished, ${BUILD_NSKIP} skipped, and ${BUILD_NFAIL} failed builds in ${BUILD_NBUILT} build script(s).";
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build_times_get; log_msg info "Build time: ${BUILD_TIMES_HOURS} hour(s), ${BUILD_TIMES_MINUTES} minute(s), and ${BUILD_TIMES_SECS} second(s).";
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if [ $(( ${BUILD_NFINI} + ${BUILD_NSKIP} )) -ge 0 ]					\
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&& [ ${BUILD_NFAIL} -eq 0 ]								\
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&& [ ${ARG_TARBALL:-0} -eq 1 ]; then
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	update_build_status build_finish tarball_start;
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	log_msg info "Building distribution tarball...";
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	cd ${PREFIX}; PREFIX_BASENAME=${PREFIX_NATIVE##*/};
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	rm_if_exists -m ${PREFIX_BASENAME}/lib.bak;
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	tar -C ${PREFIX_BASENAME}/lib -cpf - . | tar -C ${PREFIX_BASENAME}/lib.bak -xpf -;
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	log_msg info "Backed up ${PREFIX_BASENAME}/lib.";
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	find native/lib -maxdepth 1 -type l						\
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	 	-exec sh -c '[ -f "${DEST:=native/lib/$(readlink -- "${0}")}" ] &&	\
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			rm -f -- "${0}" && ln -f -- "${DEST}" "${0}"' {} \;;
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	log_msg info "Converted symbolic links in ${PREFIX_BASENAME}/lib to hard links.";
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	tar -cJpf ${TARBALL_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.tar.xz\
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		$(find_with_no_paths "${TARBALL_EXCLUDE_PATHS} native/lib.bak" .	\
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			-mindepth 1 -maxdepth 2 -type d -not -path ./native) midipix.sh;
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	log_msg info "Finished building distribution tarball.";
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	sha256sum ${TARBALL_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.tar.xz\
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		> ${TARBALL_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.sha256sum;
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	rm -rf ${PREFIX_BASENAME}/lib; mv ${PREFIX_BASENAME}/lib.bak ${PREFIX_BASENAME}/lib;
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	log_msg info "Restored ${PREFIX_BASENAME}/lib.";
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	log_msg info "Building source tarball...";
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	tar -cJpf ${TARBALL_SRC_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.tar.xz\
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		$(find tmp -mindepth 1 -maxdepth 1 -type d				\
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			\( -name \*-native-\* -or -name \*-cross-\* \));
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	log_msg info "Finished building source tarball.";
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	sha256sum ${TARBALL_SRC_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.tar.xz\
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		> ${TARBALL_SRC_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.sha256sum;
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	cd ${OLDPWD};
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	update_build_status tarball_finish;
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fi;
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update_build_status finish; clean_build_status;
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exit ${BUILD_SCRIPT_RC})} 2>&1 | tee ${PREFIX}/${BUILD_LOG_FNAME:=build-$(date ${TIMESTAMP_FMT_STATUS_FILES}).log} &
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trap "kill -INT $!" HUP INT TERM USR1 USR2; wait;
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# vim:filetype=sh