rwx/sh/log/log.sh

RWX_LOG_LEVEL_FATAL=0
RWX_LOG_LEVEL_ERROR=1
RWX_LOG_LEVEL_WARN=2
RWX_LOG_LEVEL_INFO=3
RWX_LOG_LEVEL_DEBUG=4
RWX_LOG_LEVEL_TRACE=5

RWX_LOG_LEVEL=${RWX_LOG_LEVEL_INFO}

rwx_log() { rwx_log_info "${@}"; }

rwx_log_debug() {
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_DEBUG}" ]; then
		_rwx_log "[DEBUG]" "${@}"
	fi
}

rwx_log_error() {
	local code="${1}"
	shift
	[ -n "${code}" ] || rwx_log_fatal 1 "No error code"
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_ERROR}" ]; then
		_rwx_log "[ERROR]" "${@}" >&2
		return "${code}"
	fi
}

rwx_log_fatal() {
	local code="${1}"
	shift
	[ -n "${code}" ] || rwx_log_fatal 1 "No error code"
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_FATAL}" ]; then
		_rwx_log "[FATAL]" "${@}" >&2
		exit "${code}"
	fi
}

rwx_log_info() {
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_INFO}" ]; then
		_rwx_log "" "${@}"
	fi
}

rwx_log_trace() {
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_TRACE}" ]; then
		_rwx_log "[TRACE]" "${@}"
	fi
}

rwx_log_warn() {
	if [ "${RWX_LOG_LEVEL}" -ge "${RWX_LOG_LEVEL_WARN}" ]; then
		_rwx_log "[ WARN]" "${@}"
	fi
}

_rwx_log() {
	local prefix="${1}"
	shift
	[ ${#} -gt 0 ] || set -- ""
	local line
	for line in "${@}"; do
		if [ -n "${prefix}" ]; then
			__rwx_log "${prefix} ${line}"
		else
			__rwx_log "${line}"
		fi
	done
}