TIMESTAMP_FMT="${TIMESTAMP_FMT:-"%Y/%m/%d %H:%M:%S"}";

check_prereqs() {

	for _cmd in "$@"; do

		if ! command -v "${_cmd}" >/dev/null; then

			echo "Error: missing prerequisite command \`${_cmd}" >&2;

			exit 1;

		fi;

	done; unset _cmd;

};

date() {

	command date +"${TIMESTAMP_FMT}";

};

fetch() {

	wget --no-check-certificate -N "${@}";

};

fetch_git() {

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

		(cd "${1}" && git pull origin main);

	else

		git clone "${2}" "${1}";

	fi;

};

is_build_script_done() {

	_script_fname="${SCRIPT_FNAME##*/}";

	if [ -f "${WORKDIR}/.${_script_fname%.build}.${1}" ]; then

		unset script_fname;

		return 0;

	else

		unset script_fname;

		return 1;

	fi;

};

set_build_script_done() {

	_script_fname="${SCRIPT_FNAME##*/}";

	_done_fname="${WORKDIR}/.${_script_fname%.build}";

	while [ $# -ge 1 ]; do

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

			rm -f "${_done_fname}.${1#-}";

		else

			touch "${_done_fname}.${1}";

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

		fi; shift;

	done;

	unset _script_fname _done_fname;

};

log_msg() {

	_lvl="${1}"; shift;

	case "${_lvl}" in

		fail) printf "\033[91m"; ;;

		info) printf "\033[97m"; ;;

		succ) printf "\033[92m"; ;;

	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;

	unset _lvl;

};

parse_with_pkg_name() {

	_pkg_name="${1}"; shift;

	while [ $# -ge 0 ]; do

		_pkg_url="${1}"; _envvs="${2}"; _pkg_fname="${_pkg_url##*/}";

		if [ "x${_pkg_fname%%-*}" = "x${_pkg_name}" ]; then

			_IFS="${IFS}"; IFS=:;

			for _envv in ${_envvs}; do

				export ${_envv};

			done; IFS="${_IFS}";

			_pkg_subdir="${_pkg_fname%%.tar*}";

			unset _envvs _envv;

			return;

		fi; shift 2;

	done;

	unset _pkg_name _pkg_url _envvs _pkg_fname _envv _IFS _pkg_subdir;

};

rm_if_exists() {

	while [ $# -gt 1 ]; do [ "x${1%[a-z]}" = "x-" ] &&\

		eval _${1#-}flag=1; shift; done;

	_dir="${1}";

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

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

	fi;

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

		unset _mflag; mkdir "${1}" || return 2;

	fi;

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

		unset _cflag; cd "${1}" || return 3;

	fi;

};

run_configure_with_extra_args() {

	_IFS="${IFS}"; IFS=","; _script="${1}"; _extra_args="${2}";

	shift 2; "${_script}" "${@}" ${_extra_args}; IFS="${_IFS}";

	unset _script _extra_args;

};

set_build_dir() {

	export _build_dir="${1}-build-${2}";

};

set_env_vars() {

	_val="${1}"; shift;

	while [ $# -ge 1 ]; do

		export "${1}=${_val}"; shift;

	done; unset _val;

};

split() {

	_IFS="${IFS}"; IFS="${1}"; set -- ${2};

	IFS="${_IFS}"; echo "${*}"; unset _IFS;

};

# vim:filetype=sh