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#
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# set +o errexit -o noglob -o nounset is assumed.
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#
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#
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# Private globals and subroutines
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#
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RTLP_LOG_NO_ATTR=0;
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RTLP_LOG_FNAME="";
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RTLP_LOG_LVL="0";
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rtl_log_set_fname() { RTLP_LOG_FNAME="${1}"; };
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rtl_log_set_lvl() { RTLP_LOG_LVL="${1}"; };
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rtl_log_set_no_attr() { RTLP_LOG_NO_ATTR="${1}"; };
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rtlp_log_printf() {
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	local _attr="${1}" _fmt="${2}"; shift 2; _msg="$(printf "${_fmt}" "${@}")";
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	if [ -n "${RTLP_LOG_FNAME}" ]; then
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		printf "%s\n" "${_msg}" >> "${RTLP_LOG_FNAME}";
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	fi;
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	if [ "${RTLP_LOG_NO_ATTR:-0}" -eq 0 ]; then
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		printf "\033[0m\033[${_attr}m%s\033[0m\n" "${_msg}";
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	else
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		printf "%s\n" "${_msg}";
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	fi;
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};
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#
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# Public globals
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#
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RTL_LOG_MSG_FATAL_COLOUR=91;		# Bright red
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RTL_LOG_MSG_WARNING_COLOUR=31;		# Dark red
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RTL_LOG_MSG_SUCCESS_COLOUR=33;		# Dark yellow
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RTL_LOG_MSG_SUCCESS_END_COLOUR=32;	# Dark green
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RTL_LOG_MSG_INFO_COLOUR=93;		# Bright yellow
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RTL_LOG_MSG_INFO_END_COLOUR=92;		# Bright green
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RTL_LOG_MSG_NOTICE_COLOUR=96;		# Bright cyan
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RTL_LOG_MSG_VERBOSE_COLOUR=90;		# Dark grey
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RTL_LOG_MSG_DEBUG_COLOUR=36;		# Dark cyan
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rtl_log_env_vars() {
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	local _arg_len_max=0;
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	rtl_log_msg info "Variables for this ${1:-build}:"; shift;
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	_arg_len_max="$(rtl_lmax "${@}")";
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	while [ "${#}" -gt 0 ]; do
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		rtl_log_msg info				\
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			"%${_arg_len_max}.${_arg_len_max}s=%s"	\
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			"${1%%=*}" "$(rtl_get_var_unsafe "${1#*=}")";
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		shift;
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	done;
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};
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rtl_log_msg() {
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	local _lvl="${1}" _fmt="${2}" _attr=""; shift 2;
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	case "${RTLP_LOG_LVL:-0}" in
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	0)	rtl_lmatch "notice verbose debug" "${_lvl}" && return; ;;
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	1)	rtl_lmatch "verbose debug" "${_lvl}" && return; ;;
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	2)	rtl_lmatch "debug" "${_lvl}" && return; ;;
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	3)	;;
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	esac;
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	case "${_lvl}" in
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	fatal|fatalexit)	_attr="${RTL_LOG_MSG_FATAL_COLOUR}"; ;;
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	warning)		_attr="${RTL_LOG_MSG_WARNING_COLOUR}"; ;;
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	success)		_attr="${RTL_LOG_MSG_SUCCESS_COLOUR}"; ;;
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	success_end)		_attr="${RTL_LOG_MSG_SUCCESS_END_COLOUR}"; ;;
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	info)			_attr="${RTL_LOG_MSG_INFO_COLOUR}"; ;;
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	info_end)		_attr="${RTL_LOG_MSG_INFO_END_COLOUR}"; ;;
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	notice)			_attr="${RTL_LOG_MSG_NOTICE_COLOUR}"; ;;
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	verbose)		_attr="${RTL_LOG_MSG_VERBOSE_COLOUR}"; ;;
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	debug)			_attr="${RTL_LOG_MSG_DEBUG_COLOUR}"; ;;
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	esac;
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	rtlp_log_printf "${_attr}" "==> %s ${_fmt}" "$(rtl_date)" "${@}";
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	if [ "x${_lvl}" = "xfatalexit" ]; then
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		exit 1;
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	fi;
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};
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# vim:filetype=sh