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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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#
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# Clear the environment.
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# Source subroutine scripts.
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# Source the build variables file and its local overrides, if any.
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# Process command line arguments.
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for __ in subr/*.subr; do
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	. ./${__};
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done;
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check_cpuinfo;
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while [ ${#} -gt 0 ]; do
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case ${1} in
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-c)	ARG_CLEAN=1; ;;
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-C)	ARG_CHECK_UPDATES=1; ;;
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-n)	ARG_DRYRUN=1 ARG_VERBOSE=1; ;;
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-N)	ARG_OFFLINE=1; ;;
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-i)	ARG_IGNORE_SHA256SUMS=1; ;;
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-t*)	ARG_TARBALL=1; [ "${1#-t.}" != "${1}" ] && TARBALL_SUFFIX=${1#-t.}; ;;
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-v)	ARG_VERBOSE=1; ;;
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-x)	ARG_XTRACE=1; set -o xtrace; ;;
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-a)	[ -z "${2}" ] && exec cat etc/build.usage || ARCH=${2}; shift; ;;
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-b)	[ -z "${2}" ] && exec cat etc/build.usage || BUILD=${2}; shift; ;;
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-r)	if [ -z "${2}" ]; then
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		exec cat build.usage;
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	elif [ "${2%:*}" = "${2}" ]; then
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		ARG_RESTART=${2};
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	else
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		ARG_RESTART=${2%:*}; ARG_RESTART_AT=${2#*:};
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	fi;
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	if [ -z "${ARG_RESTART_AT}" ]; then
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		ARG_RESTART_AT=ALL;
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	fi; shift; ;;
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host_toolchain|native_toolchain|runtime|lib_packages|leaf_packages|devroot|world)
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	BUILD_TARGETS_META="${BUILD_TARGETS_META:+${BUILD_TARGETS_META} }${1}"; ;;
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*=*)	set_var_unsafe "${1%%=*}" "${1#*=}"; ;;
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*)	exec cat etc/build.usage; ;;
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esac; shift;
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done;
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source_vars; clear_env;
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if [ -z "${BUILD_TARGETS_META}" ]; then
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	BUILD_TARGETS_META=world;
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fi;
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BUILD_TARGETS_META="invariants ${BUILD_TARGETS_META}";
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#
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# Check whether the pathnames in build.vars contain non-empty valid values.
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# Check whether all prerequisite command names resolve.
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# Check whether all prerequisite pathnames resolve.
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# Check whether all prerequisite Perl modules exist.
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# Clean ${PREFIX} if requested.
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# Create directory hierarchy and usr -> . symlinks.
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check_paths; clean_prefix; create_dirs;
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init_build_log; init_build_progress_file;
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{(init_build_vars;
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if [ ${ARG_CHECK_UPDATES:-0} -eq 0 ]; then
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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 "build (global)" ${LOG_ENV_VARS};
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else
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	log_msg info "Version check run started by ${BUILD_USER:=${USER}}@${BUILD_HNAME:=$(hostname)} at ${BUILD_DATE_START}.";
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fi;
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for BUILD_TARGET_LC in $(subst_tgts ${BUILD_TARGETS_META}); do
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	BUILD_TARGET=$(echo ${BUILD_TARGET_LC} | tr a-z A-Z);
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	for BUILD_PACKAGE_LC in $(get_var_unsafe ${BUILD_TARGET}_PACKAGES); do
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		BUILD_PACKAGE=$(echo ${BUILD_PACKAGE_LC} | tr a-z A-Z);
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		if [ "${BUILD_TARGET}" != "INVARIANTS" ]\
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		&& [ -n "${ARG_RESTART}" ]; then
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			if [ "${ARG_RESTART}" != "ALL" ] &&\
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			! match_list ${ARG_RESTART} , ${BUILD_PACKAGE_LC}; then
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				log_msg vnfo "Skipped \`${BUILD_PACKAGE_LC}' (-r specified.)";
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				: $((BUILD_NSKIP+=1)); BUILD_SCRIPT_RC=0; continue;
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			fi;
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		fi;
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		if [ ${ARG_CHECK_UPDATES:-0} -eq 1 ]\
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		&& [ "${BUILD_PACKAGE#*.*}" = "${BUILD_PACKAGE}" ]; then
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			if [ ${ARG_DRYRUN:-0} -eq 1 ]; then
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				echo check_pkg_updates "${BUILD_PACKAGE_LC}"			\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_VERSION)"	\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_URL)"		\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_URL_TYPE)";
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			else
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				check_pkg_updates "${BUILD_PACKAGE_LC}"			\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_VERSION)"	\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_URL)"		\
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					"$(get_var_unsafe PKG_${BUILD_PACKAGE}_URL_TYPE)";
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			fi;
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			continue;
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		fi;
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		if [ "${BUILD_TARGET}" != "INVARIANTS" ]\
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		&& [ -z "${ARG_RESTART}" ]\
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		&& is_build_script_done finish "${BUILD_PACKAGE_LC}"; then
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			log_msg vnfo "Skipped \`${BUILD_PACKAGE_LC}' (already built.)";
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			: $((BUILD_NSKIP+=1)); BUILD_SCRIPT_RC=0; continue;
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		fi;
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		if [ -e build/${BUILD_PACKAGE_LC}.build ]; then
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			BUILD_SCRIPT_FNAME=build/${BUILD_PACKAGE_LC}.build;
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		else
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			BUILD_SCRIPT_FNAME=build/pkg.build;
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		fi;
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		log_msg vnfo "Invoking build script \`${BUILD_SCRIPT_FNAME}'${ARG_RESTART:+ (forcibly)} for package \`${BUILD_PACKAGE_LC}'.";
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		(set -o errexit -o noglob;
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		 MIDIPIX_BUILD_PWD=$(pwd); PKG_BUILD=${BUILD}; PKG_TARGET=${TARGET};
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		 PKG_PREFIX=$(get_vars_unsafe ${BUILD_TARGET}_PREFIX			\
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			PKG_${BUILD_PACKAGE%.*}_PREFIX);				
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		 cd ${WORKDIR}; source_scripts);
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		BUILD_SCRIPT_RC=${?}; case ${BUILD_SCRIPT_RC} in
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		0) log_msg succ "Finished \`${BUILD_PACKAGE_LC}' build.";
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			: $((BUILD_NFINI+=1)); continue; ;;
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		*) log_msg fail "Build failed in \`${BUILD_PACKAGE_LC}' (last return code ${BUILD_SCRIPT_RC}.).";
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			: $((BUILD_NFAIL+=1)); break; ;;
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		esac;
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	done;
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	if [ ${BUILD_SCRIPT_RC:-0} -ne 0 ]; then
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		break;
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	fi;
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done;
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copy_etc; do_strip; do_tarballs; fini_build_vars;
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log_msg info "${BUILD_NFINI} finished, ${BUILD_NSKIP} skipped, and ${BUILD_NFAIL} failed builds in ${BUILD_NBUILT} build script(s).";
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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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fini_build_progress_file;
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exit ${BUILD_SCRIPT_RC})} 2>&1 | tee ${BUILD_LOG_FNAME} &
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TEE_PID=${!};
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trap "rm -f ${BUILD_STATUS_IN_PROGRESS_FNAME};	\
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	log_msg fail \"Build aborted.\";	\
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	echo kill ${TEE_PID};			\
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	kill ${TEE_PID}" HUP INT TERM USR1 USR2;
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wait;
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# vim:filetype=sh