#

# set -o errexit -o noglob are assumed.

#

EXP_RTL_IFS="${IFS}";

ex_rtl_basename() { echo "${1##*/}"; };

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

ex_rtl_dirname() { echo "${1%/*}"; };

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

ex_rtl_pop_IFS() { IFS="${EXP_RTL_IFS}"; };

ex_rtl_push_IFS() { EXP_RTL_IFS="${IFS}"; IFS="${1}"; };

ex_rtl_try_run() { ex_rtl_test_cmd "${1}" && { "${@}" || exit ${?}; }; };

ex_rtl_set_var_unsafe() { [ -n "${2}" ] && eval ${1}=\"${2}\" || return 0; };

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

ex_rtl_toupper() { echo "${1}" | tr a-z A-Z; };

ex_rtl_unset_vars() { while [ ${#} -gt 0 ]; do unset "${1}"; shift; done; };

ex_rtl_lfilter() {

	local _list="${1}" _filter="${2}" _lnew _litem _litem_filter;

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

		echo "${_list}"; return 0;

	else for _litem in ${_list}; do

		for _litem_filter in ${_filter}; do

			if [ "${_litem_filter}" = "${_litem}" ]; then

				_lnew="${_lnew:+${_lnew} }${_litem}";

				break;

			fi;

		done;

	done; fi;

	echo "${_lnew}";

};

ex_rtl_lfilter_not() {

	local _list="${1}" _filter="${2}" _lnew _litem _litem_filter _filterfl;

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

		echo "${_list}"; return 0;

	else for _litem in ${_list}; do

		_filterfl=0;

		for _litem_filter in ${_filter}; do

			if [ "${_litem_filter}" = "${_litem}" ]; then

				_filterfl=1; break;

			fi;

		done;

		if [ "${_filterfl:-0}" -eq 0 ]; then

			_lnew="${_lnew:+${_lnew} }${_litem}";

		fi;

	done; fi;

	echo "${_lnew}";

};

ex_rtl_lmatch() {

	local _cmp="${3}" IFS="${2}"; set -- ${1};

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

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

			return 0;

		fi; shift;

	done; return 1;

};

ex_rtl_run_cmd_unsplit() {

	local _cmd="${1}" _cmdline _rc IFS; shift;

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

		[ -n "${1}" ] &&\

			_cmdline="${_cmdline:+${_cmdline}:}${1}";

		shift;

	done;

	IFS=:; ${_cmd} ${_cmdline}; _rc=$?;

	return ${_rc};

};

ex_rtl_set_vars() {

	local _vname_dst="${1}" _vname_src_tmpls="${2}"			\

		_vars_set_vname="${3}" _vname_src _vars_set_tmp=""	\

		_vars_set_old;

	for _vname_src in ${_vname_src_tmpls}; do

		_vname_src="${_vname_src}_${_vname_dst}";

		_vval_src="$(ex_rtl_get_var_unsafe "${_vname_src}")";

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

			ex_rtl_set_var_unsafe "PKG_${_vname_dst}" "${_vval_src}";

			_vars_set_tmp="${_vars_set_tmp:+${_vars_set_tmp} }PKG_${_vname_dst}";

		fi;

	done;

	_vars_set_old="$(ex_rtl_get_var_unsafe "${_vars_set_vname}")";

	ex_rtl_set_var_unsafe "${_vars_set_vname}"				\

		"${_vars_set_old:+${_vars_set_old} }${_vars_set_tmp}";

};

# vim:filetype=sh