#

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

# See warning at the top of build.vars.

#

date() { command date +"${1:-${TIMESTAMP_FMT}}"; };

get_var_unsafe() { eval echo \${${1}}; };

set_var_unsafe() { eval ${1}=\"${2}\"; };

push_IFS() { _pI_IFS="${IFS}"; IFS="${1}"; };

pop_IFS() { IFS="${_pI_IFS}"; unset _pI_IFS; };

set_build_dir() { PKG_BUILD_DIR=${1}-${2}-${PKG_TARGET}; };

split() { push_IFS "${1}"; set -- ${2}; pop_IFS; echo "${*}"; };

test_cmd() { command -v "${1}" >/dev/null; };

unsplit() { push_IFS "${1}"; shift; set -- "${@}"; echo "${*}"; pop_IFS; };

get_vars_unsafe() {

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

		_gvu_vval="$(eval echo \${${1}})";

		[ -z "${_gvu_vval}" ] || _gvu_vval_="${_gvu_vval}";

		shift;

	done; echo "${_gvu_vval_}";

	unset _gvu_vval _gvu_vval_;

};

log_msg() {

	_lm_lvl=${1}; shift;

	if [ "${_lm_lvl#v}" != "${_lm_lvl}" ]\

	&& [ ${ARG_VERBOSE:-0} -eq 0 ]; then

		return;

	fi;

	case ${_lm_lvl} in

		failexit) printf "\033[0m\033[${LOG_MSG_FAIL_COLOUR}m"; ;;

		fail) printf "\033[0m\033[${LOG_MSG_FAIL_COLOUR}m"; ;;

		info) printf "\033[0m\033[${LOG_MSG_INFO_COLOUR}m"; ;;

		vnfo) printf "\033[0m\033[${LOG_MSG_INFO_COLOUR}m"; ;;

		succ) printf "\033[0m\033[${LOG_MSG_SUCC_COLOUR}m"; ;;

		warn) printf "\033[0m\033[${LOG_MSG_WARN_COLOUR}m"; ;;

		varn) printf "\033[0m\033[${LOG_MSG_WARN_COLOUR}m"; ;;

	esac;

	if [ $# -gt 1 ]; then

		printf "==> %s %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}" "$*";

	else

		printf "==> %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}";

	fi; [ ${_lm_lvl} = failexit ] && exit 1 || unset _lm_lvl;

};

insecure_mkdir() {

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

		if [ -z "${1}" ]; then

			return 1;

		elif [ ! -e "${1}" ]; then

			log_msg varn "Making directory \`${1}'.";

			mkdir -p -- "${1}";

		fi; shift;

	done;

};

match_list() {

	_ml_cmp="${3}"; push_IFS "${2}"; set -- ${1}; pop_IFS;

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

		if [ "${1}" = "${_ml_cmp}" ]; then

			unset _ml_cmp; return 0;

		fi; shift;

	done; unset _ml_cmp; return 1;

};

secure_cd() {

	if [ \( -z "${1}" \) -o \( ! -e "${1}" \) ]; then

		return 1;

	else

		(cd "${1}"; [ "${PWD#${PREFIX_ROOT}}" = "${PWD}" ] &&\

			return 1 || return 0);

		if [ ${?} -eq 0 ]; then

			log_msg varn "Changing working directory to \`${1}'.";

			cd -- "${1}";

		else

			log_msg failexit "secure_cd() called with pathname \`${1}' not below \${PREFIX_ROOT} (${PREFIX_ROOT}). This is a bug.";

		fi;

	fi;

};

secure_rm() {

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

		if [ -z "${1}" ]; then

			return 1;

		elif [ -e "${1}" ]; then

			if [ -d "${1}" ]; then

				_sr_pname_check="${1}";

			else

				_sr_pname_check="$(dirname "${1}")";

			fi;

			(cd "${_sr_pname_check}"; [ "${PWD#${PREFIX_ROOT}}" = "${PWD}" ] &&\

				return 1 || return 0);

			if [ ${?} -eq 0 ]; then

				unset _sr_pname_check;

				log_msg varn "Removing directory or file \`${1}'.";

				rm -rf -- "${1}";

			else

				log_msg failexit "secure_rm() called with pathname \`${1}' not below \${PREFIX_ROOT} (${PREFIX_ROOT}). This is a bug.";

			fi;

		fi; shift;

	done;

};

is_build_script_done() {

	if [ "${1}" = "clean" ]\

	|| [ "${1}" = distclean ]; then

		if match_list "${ARG_RESTART}" , ${BUILD_PACKAGE_LC}	\

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

		&& match_list "${ARG_RESTART_AT}" , "${1}"; then

			return 1;		# Build

		else

			return 0;		# Skip

		fi;

	elif [ "${ARG_RESTART}" = "ALL" ]; then

		return 1;			# Build

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

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

			if [ "${ARG_RESTART_AT}" = "ALL" ]; then

				return 1;	# Build

			elif match_list "${ARG_RESTART_AT}" , "${1}"; then

				return 1;	# Build

			else

				return 0;	# Skip

			fi;

		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)" ]\

	&& [ -z "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_URLS_GIT)" ]\

	&& [ -z "$(get_var_unsafe PKG_${_pwpn_pkg_name_uc}_VERSION)" ]; 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

				set_var_unsafe PKG_${_pwpn_vname} "$(get_var_unsafe DEFAULT_${_pwpn_vname})";

			fi;

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

				set_var_unsafe 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

				set_var_unsafe 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

				set_var_unsafe 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

				set_var_unsafe 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 $(set); do

		if [ "${_pwpn_env_var#PKG_${_pwpn_pkg_name_uc}}" != "${_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