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#!/bin/sh
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# Copyright (c) 2016, 2017, 2018, 2019 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
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#
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buildp_ast() {
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	trap '' HUP INT TERM USR1 USR2;
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	local _param="${1}" _pids="" _pids_niter=0 _pkg_name="" RTL_KILL_TREE_PIDS="";
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	if [ "${_param}" = "abort" ]; then
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		rtl_log_msg fatalexit "Build aborted.";
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	fi;
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	while [ "${_pids_niter}" -lt 8 ]; do
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		_pids="$(rtl_lconcat "${_pids}" "${RTL_KILL_TREE_PIDS}")"; RTL_KILL_TREE_PIDS="";
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		if ! rtl_kill_tree "${$}" "TERM"\
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		|| [ -z "${RTL_KILL_TREE_PIDS}" ]; then
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			break;
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		else
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			: $((_pids_niter+=1));
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		fi;
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	done;
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	if [ -n "${_pids}" ]; then
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		rtl_log_msg notice "Killed PID(s): %s" "$(rtl_uniq ${_pids})";
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	fi;
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	if [ -n "${EX_PKG_DISPATCH_WAIT}" ]; then
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		for _pkg_name in ${EX_PKG_DISPATCH_WAIT}; do
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			rtl_state_clear "${BUILD_WORKDIR}" "${_pkg_name}";
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		done;
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		rtl_log_msg notice "Reset package state for: %s" "${EX_PKG_DISPATCH_WAIT}";
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	fi;
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	if [ -n "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then
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		rtl_fileop rm "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
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	fi;
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};
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buildp_dispatch_fail_pkg() {
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	local _group_name="${1}" _pkg_name="${2}";
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	: $((BUILD_NFAIL+=1)); BUILD_PKGS_FAILED="$(rtl_lconcat "${BUILD_PKGS_FAILED}" "${_pkg_name}")";
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	if [ "${ARG_RELAXED:-0}" -eq 0 ]; then
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		rtl_log_msg fatal "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log:";
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		cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
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		if [ -n "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]; then
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			printf "%s" "${_pkg_name}" > "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}";
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		fi;
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		rtl_log_msg fatal "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
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	else	rtl_log_msg warning "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
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	fi;
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	if [ "${ARG_DUMP_ON_ABORT:-0}" -eq 1 ]; then
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		rtl_log_msg info "Logged environment dump for failed package \`%s' to \`%s'." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}.dump";
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		rtl_log_msg info "Enter an interactive package build shell w/ the command line: ./pkgtool.sh -a %s -b %s \"%s\" PREFIX=\"%s\""\
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				"${ARCH}" "${BUILD_KIND}" "${_pkg_name}" "${PREFIX}";
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	fi;
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	if [ "${ARG_RELAXED:-0}" -eq 0 ]; then
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		exit 1;
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	fi;
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};
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buildp_dispatch_group_state() {
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	local _msg="${1}" _group_name="${2}";
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	case "${_msg}" in
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	finish_group)	rtl_log_msg success_end "[%3d%%     ] [%03d/%03d] Finished \`%s' build group." "${6}" "${4}" "${5}" "${_group_name}"; ;;
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	start_group)	rtl_log_msg success "[%3d%%     ] [%03d/%03d] Starting \`%s' build group..." "${6}" "${4}" "${5}" "${_group_name}"; ;;
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	esac;
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};
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buildp_dispatch_pkg_state() {
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	local _msg="${1}" _group_name="${2}" _pkg_name="${3}";
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	case "${_msg}" in
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	disabled_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg verbose "Skipping disabled package \`%s'." "${_pkg_name}"; ;;
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	missing_pkg)	rtl_log_msg fatalexit "Error: unknown package \`%s'." "${_pkg_name}"; ;;
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	msg_pkg)	shift 3; rtl_log_msg verbose "%s/%s: %s" "${_group_name}" "${_pkg_name}" "${*}"; ;;
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	skipped_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg verbose "Skipping finished package \`%s'." "${_pkg_name}"; ;;
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	start_pkg)	rtl_log_msg info "[%3d%%/%3d%%] [%03d/%03d] Starting \`%s' build..." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
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	step_pkg)	rtl_log_msg verbose "Finished build step %s of package \`%s'." "${4}" "${_pkg_name}"; ;;
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	finish_pkg)
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		: $((BUILD_NFINI+=1));
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		if [ "${ARG_VERBOSE:-0}" -ge 2 ]; then
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			cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
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		fi;
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		rtl_log_msg info_end "[%3d%%/%3d%%] [%03d/%03d] Finished \`%s' build." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
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	start_pkg_child)
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		if [ "${PKG_NO_LOG_VARS:-0}" -eq 0 ]; then
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			rtl_log_env_vars "build" $(rtl_get_vars_fast "^PKG_");
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		fi;
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		if [ "${ARG_VERBOSE:-0}" -ge 3 ]; then
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			set -o xtrace;
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		fi; ;;
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	esac;
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};
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buildp_dispatch() {
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	local _msg="${1}"; shift;
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	case "${_msg}" in
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	disabled_pkg|finish_pkg|missing_pkg|msg_pkg|skipped_pkg|start_pkg|start_pkg_child|step_pkg)
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		buildp_dispatch_pkg_state "${_msg}" "${@}"; ;;
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	finish_group|start_group)
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		buildp_dispatch_group_state "${_msg}" "${@}"; ;;
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	*)	if command -v "buildp_dispatch_${_msg}" >/dev/null 2>&1; then
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			"buildp_dispatch_${_msg}" "${@}";
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		fi; ;;
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	esac;
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};
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buildp_time_init() {
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	BUILD_DATE_START="$(rtl_date %Y-%m-%d-%H-%M-%S)";
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	_build_time_secs="$(rtl_date %s)";
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};
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buildp_time_update() {
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	: $((_build_time_secs=$(rtl_date %s)-${_build_time_secs}));
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	: $((_build_time_hours=${_build_time_secs}/3600));
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	: $((_build_time_minutes=(${_build_time_secs}%3600)/60));
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	: $((_build_time_secs=(${_build_time_secs}%3600)%60));
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};
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build() {
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	local	_build_time_hours=0 _build_time_mins=0 _build_time_secs=0 _pkg_name="" _rc=0 _status=""			\
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		BUILD_DATE_START="" BUILD_GROUPS="" BUILD_GROUPS_INHIBIT_DEPS=0 BUILD_HNAME BUILD_IS_PARENT=1		\
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		BUILD_NFAIL=0 BUILD_NFINI=0 BUILD_NSKIP=0 BUILD_PKGS_FAILED="" BUILD_TARGET="" BUILD_USER=""		\
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		DEFAULT_BUILD_CPUS=1 DEFAULT_BUILD_LAST_FAILED_PKG_FNAME="" DEFAULT_BUILD_LOG_FNAME=""			\
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		DEFAULT_BUILD_STEPS="" DEFAULT_BUILD_VARS="" DEFAULT_CLEAR_PREFIX_PATHS="" DEFAULT_GIT_ARGS=""		\
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		DEFAULT_GITROOT_HEAD="" DEFAULT_LOG_ENV_VARS="" DEFAULT_TARGET="" DEFAULT_WGET_ARGS=""			\
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		MIDIPIX_BUILD_PWD=""; DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME=""; EX_PKG_DISPATCH_WAIT="";
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	if ! . "${0%/*}/subr/build_init.subr"; then
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		_rc=1; printf "Error: failed to source \`${0%/*}/subr/build_init.subr'." >&2;
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	elif ! build_init "${@}"; then
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		_rc=1; _status="${_status}";
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	elif [ -n "${_status}" ]; then
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		_rc=0; _status="${_status}";
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	else	trap "buildp_ast exit" EXIT; trap "buildp_ast abort" HUP INT TERM USR1 USR2;
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		buildp_time_init;
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		rtl_log_msg info "Build started by %s@%s at %s." "${BUILD_USER}" "${BUILD_HNAME}" "${BUILD_DATE_START}";
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		rtl_log_env_vars "build (global)" ${DEFAULT_LOG_ENV_VARS};
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		ex_pkg_dispatch "${DEFAULT_BUILD_STEPS}" "${DEFAULT_BUILD_VARS}"			\
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				buildp_dispatch "${BUILD_GROUPS}" "${BUILD_GROUPS_INHIBIT_DEPS}"	\
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				"${ARG_PARALLEL}" "${BUILD_WORKDIR}/build.fifo" "${ARG_RESTART}"	\
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				"${ARG_RESTART_AT}" "${ARG_RESTART_RECURSIVE}" "${BUILD_WORKDIR}";
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		buildp_time_update;
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		rtl_log_msg info "%s finished, %s skipped, and %s failed package(s)." "${BUILD_NFINI:-0}" "${BUILD_NSKIP:-0}" "${BUILD_NFAIL:-0}";
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		rtl_log_msg info "Build time: %s hour(s), %s minute(s), and %s second(s)." "${_build_time_hours:-0}" "${_build_time_minutes:-0}" "${_build_time_secs:-0}";
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		if [ -n "${BUILD_PKGS_FAILED}" ]; then
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			_rc=1; _status="Build script failure(s) in: ${BUILD_PKGS_FAILED}.";
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		fi;
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	fi;
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	if [ "${_rc}" -ne 0 ]; then
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		rtl_log_msg fatalexit "${_status}";
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	elif [ -n "${_status}" ]; then
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		rtl_log_msg info "${_status}";
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	fi;
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};
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set +o errexit -o noglob -o nounset; build "${@}";
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