Run this with dofile("path/to/thing.lua"), it'll dump your environment into env.log.

local handle = io.open("env.log", "w")

local function dumpt(tbl, tracker, lev)
	if tracker[tbl] then
		handle:write("see above")
		return
	end
	tracker[tbl] = true
	for key, value in pairs(tbl) do
		handle:write("\n" .. lev .. key .. " = ")
		if type(value) == "string" then
			handle:write("\"" .. value .. "\"")
		elseif type(value) == "table" then
			dumpt(value, tracker, lev .. "\t")
		else
			handle:write(tostring(value))
		end
	end
end

dumpt(_G, {}, "")

handle:close()