#

# . ./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; };

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

fetch() {

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

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

	if [ -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 [ -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;

	secure_rm ${_fg_subdir};

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

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

};

insert_build_script_link() {

	_ibsl_fname=${1};

	_ibsl_level=${_ibsl_fname%%.*};

	_ibsl_name=${_ibsl_fname#*.}; _ibsl_name=${_ibsl_name%.build};

	if [ -z "${_ibsl_fname}" -o -z "${_ibsl_level}"	\

			-o -z "${_ibsl_name}" ]		\

			|| ! isnumber ${_ibsl_level}	\

			|| [ ${#_ibsl_level} != 3 ]; then

		log_msg failexit "Error: invalid or empty build script filename/level/name.";

	elif [ -e ${_ibsl_fname} ]; then

		log_msg failexit "Error: build script \`${_ibsl_fname}' already exists.";

	elif [ -z "$(find -maxdepth 1 -name ${_ibsl_level}.\* -printf '%P\n' -quit)" ]; then

		echo ln -s -- pkg.build ${_ibsl_fname};

		ln -s -- pkg.build ${_ibsl_fname};

		unset _ibsl_fname _ibsl_level _ibsl_name;

		return 0;

	else

		_ibsl_levels="$(find -maxdepth 1 -name		\

			 ${_ibsl_level%[0-9][0-9]}\[0-9\]\[0-9\].\*	\

			-printf '%P\n' | sort -nk1)";

	fi;

	for _ibsl_fname_cur in ${_ibsl_levels}; do

		if [ \( ${_ibsl_changed:=0} -eq 0 \) -a	\

				\( "${_ibsl_fname_cur%%.*}" -eq ${_ibsl_level} \) ]; then

			echo ln -s -- pkg.build ${_ibsl_fname};

			ln -s -- pkg.build ${_ibsl_fname};

			_ibsl_changed=1;

		fi;

		if [ ${_ibsl_changed:=0} -eq 1 ]; then

			if [ -z "$(find -maxdepth 1 -name $((${_ibsl_fname_cur%%.*}+1)).\*	\

					-printf '%P\n' -quit)" ]; then

				_ibsl_last=1;

			fi;

			echo mv -- ${_ibsl_fname_cur}	\

				$((${_ibsl_fname_cur%%.*}+1)).${_ibsl_fname_cur#*.};

			mv -- ${_ibsl_fname_cur}	\

				$((${_ibsl_fname_cur%%.*}+1)).${_ibsl_fname_cur#*.};

			if [ ${_ibsl_last:-0} -eq 1 ]; then

				break;

			fi;

		fi;

	done;

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

		log_msg failexit "Error: build level ${_ibsl_level} not in \`${_ibsl_levels}'.";

	else

		unset _ibsl_levels _ibsl_fname_cur _ibsl_changed _ibsl_last;

		unset _ibsl_fname _ibsl_level _ibsl_name;

	fi;

};

isnumber() {

	[ -z "${1}" ] && return 1 || _i_num=${1};

	while [ -n "${_i_num}" ]; do

		if [ "${_i_num#[0-9]}" = "${_i_num}" ]; then

			return 1;

		else

			_i_num="${_i_num#[0-9]}";

		fi;

	done; unset _i_num; return 0;

};

is_build_script_done() {

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

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

		&& [ -z "${ARG_RESTART_SCRIPT_AT#ALL}" ]; then

			return 0;	# Skip

		elif [ "${1}" = finish ]\

		|| [ -z "${ARG_RESTART_SCRIPT_AT#ALL}" ]; then

			return 1;	# Build

		elif ! match_list ${ARG_RESTART_SCRIPT_AT} , ${1}; then

			return 0;	# Skip

		else

			return 1;	# Build

		fi;

	elif [ -f "${WORKDIR}/.${2:-$(basename ${SCRIPT_FNAME%.build})}.${1}" ]; then

		return 0;		# Skip

	else

		return 1;		# Build

	fi;

};

set_build_script_done() {

	_sbsd_script_fname=${SCRIPT_FNAME##*/};

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

	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 ${1} of build script \`${_sbsd_script_fname}'.";

		fi; shift;

	done; unset _sbsd_script_fname _sbsd_done_fname;

};

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;

};

log_msg() {

	_lm_lvl=${1}; shift;

	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"; ;;

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

		warn) 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;

};

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;

};

parse_with_pkg_name() {

	PKG_LVL=${1}; PKG_NAME=${2}; shift 2;

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

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

		unset _pwpn_pkg_NAME;

		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 "$(get_var_unsafe PKG_LVL${PKG_LVL}_${_pwpn_vname})" ]; then

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

			fi;

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

				export "PKG_${_pwpn_vname}=$(get_var_unsafe PKG_${_pwpn_pkg_NAME}_${_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 script" ${_pwpn_env_vars};

	fi; unset _pwpn_pkg_NAME _pwpn_env_var _pwpn_env_vars;

};

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;

};

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 warn "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;

};

insecure_mkdir() {

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

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

			return 1;

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

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

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

		fi; shift;

	done;

};

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 warn "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;

};

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};

};

# vim:filetype=sh