#

# . ./build.vars and set -o errexit -o noglob are assumed.

# See warning at the top of build.vars.

#

# N.B.	URLs ($1) may contain `?' or '&' characters.

fetch() {

	_f_url="${1}"; _f_sha256sum_src="${2}";

	_f_url_dst="${DLCACHEDIR}/$(basename "${_f_url}")";

	if [ ${ARG_OFFLINE:-0} -eq 1 ]\

	|| [ -e ${_f_url_dst}.fetched ]; then

		unset _f_url _f_sha256sum_src _f_url_dst;

		return 0;

	else

		wget ${WGET_ARGS} -c -O ${_f_url_dst} "${_f_url}";

	fi;

	if [ -n "${_f_sha256sum_src}" ]; then

		set -- $(openssl dgst -sha256 ${_f_url_dst}); shift $((${#}-1));

		if [ "${_f_sha256sum_dst:=${1}}" != "${_f_sha256sum_src}" ]; then

			log_msg failexit "Error: hash mismatch for URL \`${_f_url}' (is: ${_f_sha256sum_dst}, should be: ${_f_sha256sum_src}.)";

		fi;

	fi;

	touch ${_f_url_dst}.fetched;

	unset _f_url _f_url_dst _f_sha256sum_src _f_sha256sum_dst;

};

fetch_git() {

	_fg_subdir="${1}"; _fg_url="${2}"; _fg_branch="${3}";

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

		if [ -e "${DLCACHEDIR}/${_fg_subdir}" ]; then

			cd ${DLCACHEDIR}/${_fg_subdir} &&\

				git pull origin ${_fg_branch:-main} && cd ${OLDPWD};

		else

			git clone ${_fg_url} ${DLCACHEDIR}/${_fg_subdir};

			if [ -n "${_fg_branch}" -a		\

			     \( -z "${_fg_branch#main}" \) -a	\

			     \( -z "${_fg_branch#master}" \) ]; then

				cd ${DLCACHEDIR}/${_fg_subdir} &&\

					git checkout -b ${_fg_branch} && cd ${OLDPWD};

			fi;

		fi;

	fi;

	secure_rm ${_fg_subdir};

	cp -pr ${DLCACHEDIR}/${_fg_subdir} .;

};

is_build_script_done() {

	if match_list "${ARG_RESTART}" , ${BUILD_PACKAGE_LC}; then

		if [ -n "${ARG_RESTART_AT}" ]			\

		&& [ "${ARG_RESTART_AT}" != "${1}" ]; then

			return 0;	# Skip

		else

			return 1;	# Build

		fi;

	elif [ -f ${WORKDIR}/.${2:-${BUILD_PACKAGE_LC}}.${1} ]; then

		return 0;		# Skip

	else

		return 1;		# Build

	fi;

};

log_env_vars() {

	log_msg info "Variables for this ${1:-build}:"; shift;

	while [ ${_lev_nvar:=0} -lt ${#} ]; do

		_lev_arg="$(eval echo \${${_lev_nvar}})";

		_lev_arg="${_lev_arg%%=*}";

		if [ ${#_lev_arg} -gt ${_lev_arg_len_max:=0} ]; then

			_lev_arg_len_max=${#_lev_arg};

		fi; : $((_lev_nvar+=1));

	done; unset _lev_nvar _lev_arg;

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

		log_msg info "$(printf					\

			"%${_lev_arg_len_max}.${_lev_arg_len_max}s=%s"	\

			"${1%%=*}" "$(get_var_unsafe ${1#*=})")";

		shift;

	done; unset _lev_arg_len_max;

};

parse_with_pkg_name() {

	PKG_NAME=${1}; shift;

	_pwpn_pkg_name_uc=$(echo ${PKG_NAME} | tr a-z A-Z);

	if [ -z "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_URL)" ]; then

		unset _pwpn_pkg_name_uc;

		log_msg failexit "Error: package \`${PKG_NAME}' missing in build.vars.";

	else

		for _pwpn_vname in ${PKG_BUILD_VARS}; do

			if [ -n "$(get_var_unsafe DEFAULT_${_pwpn_vname})" ]; then

				export "PKG_${_pwpn_vname}=$(get_var_unsafe DEFAULT_${_pwpn_vname})";

			fi;

			if [ -n "$(get_var_unsafe ${BUILD_TARGET}_${_pwpn_vname})" ]; then

				export "PKG_${_pwpn_vname}=$(get_var_unsafe ${BUILD_TARGET}_${_pwpn_vname})";

			fi;

			if [ "${BUILD}" = "debug" ]	\

			&& [ -n "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname}_DEBUG)" ]; then

				export "PKG_${_pwpn_vname}=$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname}_DEBUG)";

			elif [ "${BUILD}" = "release" ]	\

			&& [ -n "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname}_RELEASE)" ]; then

				export "PKG_${_pwpn_vname}=$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname}_RELEASE)";

			elif [ -n "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname})" ]; then

				export "PKG_${_pwpn_vname}=$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_${_pwpn_vname})";

			fi;

		done; unset _pwpn_vname;

	fi;

	[ -z "${PKG_FNAME}" ] && PKG_FNAME=${PKG_URL##*/};

	[ -z "${PKG_SUBDIR}" ] && PKG_SUBDIR=${PKG_FNAME%%.tar*};

	[ -n "${PKG_ENV_VARS_EXTRA}" ] && set_env_vars_with_sep : "${PKG_ENV_VARS_EXTRA}";

	for _pwpn_env_var in $(export); do

		if [ "${_pwpn_env_var#PKG_}" != "${_pwpn_env_var}" ]; then

			_pwpn_env_vars="${_pwpn_env_vars:+${_pwpn_env_vars} }${_pwpn_env_var%%=*}";

		fi;

	done;

	if [ -n "${_pwpn_env_vars}" ]; then

		log_env_vars "build" ${_pwpn_env_vars};

	fi; unset _pwpn_pkg_name_uc _pwpn_env_var _pwpn_env_vars;

};

run_cmd_unsplit() {

	_rcu_cmd=${1}; shift;

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

		[ -n "${1}" ] &&\

			_rcu_cmdline="${_rcu_cmdline:+${_rcu_cmdline}:}${1}";

		shift;

	done;

	push_IFS :; ${_rcu_cmd} ${_rcu_cmdline}; _rcu_rc=$?; pop_IFS;

	unset _rcu_cmd _rcu_cmdline; return ${_rcu_rc};

};

set_build_script_done() {

	_sbsd_script_fname=${BUILD_PACKAGE_LC};

	_sbsd_done_fname=${WORKDIR}/.${_sbsd_script_fname};

	while [ $# -ge 1 ]; do

		if [ "${1#-}" != "${1}" ]; then

			secure_rm ${_sbsd_done_fname}.${1#-};

		else

			touch ${_sbsd_done_fname}.${1};

			log_msg info "Finished build step ${1} of \`${_sbsd_script_fname}'.";

		fi; shift;

	done; unset _sbsd_script_fname _sbsd_done_fname;

};

set_env_vars_with_sep() {

	_sevws_sep=${1}; shift; push_IFS ${_sevws_sep}; set -- ${1};

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

		export "${1}"; shift;

	done; unset _sevws_sep; pop_IFS;

};

# vim:filetype=sh