log.xml

<Layer LoadCommand = "%xero(function(self)
	log = {}
	log.level = {
		trace = 1,
		debug = 2,
		info  = 3,
		warn  = 4,
		error = 5,
		fatal = 6,
	}
	log.format = '[%f %L]'
	local function readerror(_, err)
		return string.sub(err, 1, -2)
	end
	for name, level in pairs(log.level) do
		local name, level = name, level
		log[name] = function(...)
			if log.cur_level <= level then
				local msg = log.format
				local fileinfo = readerror(pcall(error, '', 3))
				msg = string.gsub(msg, '%%b', string.format('%.3f', GAMESTATE:GetSongBeat()))
				msg = string.gsub(msg, '%%t', string.format('%.3f', GAMESTATE:GetSongTime()))
				msg = string.gsub(msg, '%%l', name)
				msg = string.gsub(msg, '%%L', string.upper(name))
				msg = string.gsub(msg, '%%f', string.gsub(fileinfo, '.*[\\/]', ''))
				msg = string.gsub(msg, '%%F', fileinfo)
				print(msg, unpack(arg))
			end
		end
	end
	log.level.all = 1
	log.level.off = 9e9
	function log.set(level)
		log.cur_level = level
	end
	function log.seteditor(level)
		if GAMESTATE:IsEditMode() then
			log.cur_level = level
		end
	end
	function log.setgameplay(level)
		if not GAMESTATE:IsEditMode() then
			log.cur_level = level
		end
	end
	-- default logging levels
	log.set(log.level.error)
	log.seteditor(log.level.trace)
end)" />