#

# . ./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}-${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;

};

# vim:filetype=sh