我怎样才能在lua中找到一个目录？

local handle = io.popen("pwd")  -- Linux/MacOS
-- local handle = io.popen("cd")  -- Windows
local result = handle:read("*a")
handle:close()
print("当前目录：" .. result)

local script_path = debug.getinfo(1, "S").source:sub(2)
local dir_path = script_path:match("(.*[/\\])")
print("当前脚本所在目录：" .. dir_path)

luarocks install luafilesystem

local lfs = require("lfs")
local current_dir = lfs.currentdir()
print("当前目录：" .. current_dir)