How to get file size under Lua/

its possable as its under lua/ge/ge_utils


ill have already tried to use it but failed as I can't get it to take a file path like
filename = "D:/Program Files/steam/steamapps/common/BeamNG.drive/lua/vehicle/hydros.lua"
then if I tried printing f I got nil

or am i doing something wrong? :thinking emoji:

 

Only BeamNG.drive directory is exposed to the game engine. So try using lua/vehicle/hydros.lua path instead

 

thanks, I got it working with

 

Yeah I'm bumping but now I'm trying to use it from ge_utils.lua with getFileSize() intend of having

Code:

f = io.open(filename, "r")
res = f:seek("end")

in the lua file so I tried using:

Code:

local res = obj:queueGameEngineLua('getFileSize("lua/vehicle/hydros.lua")')

and

Code:

obj:queueGameEngineLua('res = getFileSize("lua/vehicle/hydros.lua")')

but whatever I tried I couldn't get a return value

 

You can't get return values from queued commands to another lua vm. When you really need to you can get values between vlua and gelua by queuing a ge command from vlua, that will itself queue a vlua command with the return value as a parameter.

But your simplest option here is to take that getFileSize function from ge_utils.lua and copy it into a vlua script (ex: /lua/vehicle/extensions/myutils.lua) like this:

Code:

local M = {}

local function getFileSize(filename)
  local res = -1
  local f = io.open(filename, "r")
  if f == nil then
    return res
  end
  res = f:seek("end")
  f:close()
  return res
end

M.getFileSize = getFileSize

return M

Then from a vlua script you can do this:

Code:

local utils = require("extensions/myutils")
local size = utils.getFileSize("file path")

 

thanks, it works

 

BUMP! I found a way to get the file size from the game engine and return it to the vehicle Lua, and it's this:

Code:

obj:queueGameEngineLua("be:getPlayerVehicle(0):queueLuaCommand('FileSize(' .. getFileSize(\"lua/vehicle/hydros.lua\") .. ')')")

function FileSize(FS)
print(FS)
end

Yeah, it was that simple, or I guess complex, so hopefully this can help someone else