#!/bin/sh
# Copyright (c) 2016, 2017 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#

buildp_dispatch() {
	local _msg="${1}" _pkg_name="${2}" _tgt_name="${3}"					\
		_build_tgt_meta _build_tgt_lc _build_tgt_pkg_names _build_tgt_uc;
	case "${_msg}" in
	# Top-level
	start_build)	shift; build_args "${@}"; build_init; build_checks;
			ex_rtl_log_set_vnfo_lvl "${ARG_VERBOSE:-0}";
			ex_rtl_log_msg info "Build started by ${BUILD_USER:=${USER}}@${BUILD_HNAME:=$(hostname)} at ${BUILD_DATE_START}.";
			ex_rtl_log_env_vars "build (global)" ${DEFAULT_LOG_ENV_VARS};
			if [ -n "${ARG_RESTART}" ]; then
				_build_tgt_pkg_names="";
				for _build_tgt_lc in ${BUILD_TARGETS:-${TARGETS_DEFAULT}}; do
					_build_tgt_uc="$(ex_rtl_toupper "${_build_tgt_lc}")";
					_build_tgt_pkg_names="${_build_tgt_pkg_names:+${_build_tgt_pkg_names} }$(ex_rtl_get_var_unsafe ${_build_tgt_uc}_PACKAGES)";
				done;
				_build_tgt_pkg_names="$(ex_rtl_lfilter_not "${ARG_RESTART}" "${_build_tgt_pkg_names}")";
				if [ -n "${_build_tgt_pkg_names}" ]; then
					ex_rtl_log_msg failexit "Error: package(s) \`${_build_tgt_pkg_names}' unknown.";
				fi;
			fi;
			for _build_tgt_lc in ${BUILD_TARGETS:-${TARGETS_DEFAULT}}; do
				ex_pkg_dispatch "${_build_tgt_lc}"				\
						"${ARG_RESTART}" "${ARG_RESTART_AT}"		\
						buildp_dispatch;
				if [ ${?} -ne 0 ]; then
					break;
				fi;
			done;
			if ! ex_pkg_dispatch "invariants" "ALL" "ALL" buildp_dispatch; then
				break;
			fi;
			buildp_dispatch finish_build; ;;
	finish_build)	build_fini;
			ex_rtl_log_msg info "${BUILD_NFINI} finished, ${BUILD_NSKIP} skipped, and ${BUILD_NFAIL} failed builds in ${BUILD_NBUILT} build script(s).";
			ex_rtl_log_msg info "Build time: ${BUILD_TIMES_HOURS} hour(s), ${BUILD_TIMES_MINUTES} minute(s), and ${BUILD_TIMES_SECS} second(s).";
			if [ -n "${BUILD_PKGS_FAILED}" ]; then
				ex_rtl_log_msg failexit "Build script failure(s) in: ${BUILD_PKGS_FAILED}.";
			fi; ;;

	# Target build
	start_target)	ex_rtl_log_msg inf2 "Starting \`${_tgt_name}' build target..."; ;;
	finish_target)	ex_rtl_log_msg suc2 "Finished \`${_tgt_name}' build target."; ;;

	# Package build
	start_pkg)	ex_rtl_log_msg info "Starting \`${_pkg_name}' build..."; ;;
	finish_pkg)	: $((BUILD_NFINI+=1));
			if [ "${ARG_VERBOSE:-0}" -ge 2 ]; then
				cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
			fi;
			ex_rtl_log_msg succ "Finished \`${_pkg_name}' build."; ;;
	fail_pkg)	: $((BUILD_NFAIL+=1));
			BUILD_PKGS_FAILED="${BUILD_PKGS_FAILED:+${BUILD_PKGS_FAILED} }${_pkg_name}";
			if [ "${ARG_RELAXED:-0}" -eq 1 ]; then
				ex_rtl_log_msg fail "Build failed in \`${_pkg_name}', check \`${BUILD_WORKDIR}/${_pkg_name}_stderrout.log' for details.";
			else
				ex_rtl_log_msg fail "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log:";
				cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
				ex_rtl_log_msg fail "Build failed in \`${_pkg_name}'.";
				if [ "${ARG_PARALLEL:-0}" -eq 1 ]; then
					ex_rtl_log_msg fail "Terminating pending builds...";
					pkill -P "${$}";
				fi;
				exit 1;
			fi; ;;
	disabled_pkg)	ex_rtl_log_msg vnfo "Skipping disabled package \`${_pkg_name}.'"; ;;
	skipped_pkg)	ex_rtl_log_msg vnfo "Skipping finished package \`${_pkg_name}.'"; ;;
	step_pkg)	ex_rtl_log_msg vucc "Finished build step ${4} of package \`${_pkg_name}'."; ;;

	# Child process
	exec_finish)	;;
	exec_missing)	ex_rtl_log_msg failexit "Error: package \`${_pkg_name}' missing in build.vars."; ;;
	exec_start)	if [ "${PKG_NO_LOG_VARS:-0}" -eq 0 ]; then
				ex_rtl_log_env_vars "build"		\
					$(set | awk -F= '/^PKG_/{print $1}' | sort);
			fi;
			if [ "${ARG_DEBUG_MINIPIX:-0}" -eq 1 ]\
			&& [ "${_tgt_name}" = "dist_minipix" ]; then
				PKG_BUILD_STEPS="$(ex_rtl_lfilter_not	\
					"${PKG_BUILD_STEPS}" "strip")";
			elif [ "${BUILD}" = release ]; then
				PKG_BUILD_STEPS="$(ex_rtl_lfilter_not	\
					"${PKG_BUILD_STEPS}" "strip")";
			fi;
			if [ "${ARG_OFFLINE:-0}" -eq 1 ]; then
				PKG_BUILD_STEPS="$(ex_rtl_lfilter_not	\
					"${PKG_BUILD_STEPS}" "fetch_git fetch_wget")";
			fi;
			if [ "${ARG_XTRACE:-0}" -eq 1 ]; then
				set -o xtrace;
			fi; ;;
	exec_step)	ex_rtl_log_msg info "Finished build step ${4} of package \`${_pkg_name}'."; ;;
	esac; return 0;
};

for __ in $(find subr -name *.subr); do
	. "${__}"; done; buildp_dispatch start_build "${@}";

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