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#
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# . ./build.vars and set -o errexit -o noglob are assumed.
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# See warning at the top of build.vars.
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#
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date() { command date +"${1:-${TIMESTAMP_FMT}}"; };
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get_var_unsafe() { eval echo \${${1}}; };
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set_var_unsafe() { eval ${1}=\"${2}\"; };
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push_IFS() { _pI_IFS="${IFS}"; IFS="${1}"; };
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pop_IFS() { IFS="${_pI_IFS}"; unset _pI_IFS; };
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set_build_dir() { PKG_BUILD_DIR=${1}-${2}-${TARGET}; };
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split() { push_IFS "${1}"; set -- ${2}; pop_IFS; echo "${*}"; };
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test_cmd() { command -v "${1}" >/dev/null; };
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unsplit() { push_IFS "${1}"; shift; set -- "${@}"; echo "${*}"; pop_IFS; };
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get_vars_unsafe() {
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	while [ ${#} -gt 0 ]; do
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		_gvu_vval="$(eval echo \${${1}})";
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		[ -z "${_gvu_vval}" ] || _gvu_vval_="${_gvu_vval}";
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		shift;
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	done; echo "${_gvu_vval_}";
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	unset _gvu_vval _gvu_vval_;
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};
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log_msg() {
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	_lm_lvl=${1}; shift;
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	case ${_lm_lvl} in
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		failexit) printf "\033[0m\033[${LOG_MSG_FAIL_COLOUR}m"; ;;
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		fail) printf "\033[0m\033[${LOG_MSG_FAIL_COLOUR}m"; ;;
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		info) printf "\033[0m\033[${LOG_MSG_INFO_COLOUR}m"; ;;
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		succ) printf "\033[0m\033[${LOG_MSG_SUCC_COLOUR}m"; ;;
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		warn) printf "\033[0m\033[${LOG_MSG_WARN_COLOUR}m"; ;;
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	esac;
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	if [ $# -gt 1 ]; then
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		printf "==> %s %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}" "$*";
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	else
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		printf "==> %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}";
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	fi; [ ${_lm_lvl} = failexit ] && exit 1 || unset _lm_lvl;
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};
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insecure_mkdir() {
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	while [ ${#} -gt 0 ]; do
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		if [ -z "${1}" ]; then
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			return 1;
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		elif [ ! -e "${1}" ]; then
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			[ "${ARG_VERBOSE:-0}" -eq 1 ] &&\
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				log_msg warn "Making directory \`${1}'.";
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			mkdir -p -- "${1}";
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		fi; shift;
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	done;
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};
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match_list() {
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	_ml_cmp="${3}"; push_IFS "${2}"; set -- ${1}; pop_IFS;
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	while [ ${#} -gt 0 ]; do
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		if [ "${1}" = "${_ml_cmp}" ]; then
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			unset _ml_cmp; return 0;
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		fi; shift;
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	done; unset _ml_cmp; return 1;
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};
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secure_cd() {
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	if [ \( -z "${1}" \) -o \( ! -e "${1}" \) ]; then
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		return 1;
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	else
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		(cd "${1}"; [ "${PWD#${PREFIX_ROOT}}" = "${PWD}" ] &&\
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			return 1 || return 0);
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		if [ ${?} -eq 0 ]; then
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			[ "${ARG_VERBOSE:-0}" -eq 1 ] &&\
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				log_msg warn "Changing working directory to \`${1}'.";
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			cd -- "${1}";
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		else
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			log_msg failexit "secure_cd() called with pathname \`${1}' not below \${PREFIX_ROOT} (${PREFIX_ROOT}). This is a bug.";
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		fi;
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	fi;
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};
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secure_rm() {
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	while [ ${#} -gt 0 ]; do
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		if [ -z "${1}" ]; then
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			return 1;
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		elif [ -e "${1}" ]; then
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			if [ -d "${1}" ]; then
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				_sr_pname_check="${1}";
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			else
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				_sr_pname_check="$(dirname "${1}")";
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			fi;
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			(cd "${_sr_pname_check}"; [ "${PWD#${PREFIX_ROOT}}" = "${PWD}" ] &&\
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				return 1 || return 0);
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			if [ ${?} -eq 0 ]; then
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				unset _sr_pname_check;
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				[ "${ARG_VERBOSE:-0}" -eq 1 ] &&\
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					log_msg warn "Removing directory or file \`${1}'.";
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				rm -rf -- "${1}";
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			else
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				log_msg failexit "secure_rm() called with pathname \`${1}' not below \${PREFIX_ROOT} (${PREFIX_ROOT}). This is a bug.";
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			fi;
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		fi; shift;
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	done;
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};
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# vim:filetype=sh