File I/O

[magnanimousness]

Hello Everyone,

 

Is it possible to read and write to files with the lua scripts?

 

I tried editing the follow the leader script to write the entities that follow to a file using this code:

file = io.open("test.txt", "w")file:write("Adding Follower: " .. v .. "\n")			file:close()

But anytime this gets executed I get the error: "attempt to index global 'io' (a nil value)"

 

Anybody have any ideas?

 

Thanks,

[Malacath]

I guess it's not ever needed so the input/output library is probably not loaded. I have no clue how that library is called but I think you'll just have to load it similiar to

local io = require "io"

A person with more Lua experience should be able to tell you the name of the library.

[magnanimousness]

I tried your suggestion and got this instead:

 

attempt to call global 'require' (a nil value)

 

Which seems, based on my limited knowledge, like a weird error to get. Isn't 'require' intrinsic to lua?

[magnanimousness]

Okay no wait, that was my bad, I didnt have

 

local require = GLOBAL.require

 

In the file, that seems to have worked, getting an error concatenating the string, but the io nil value issue is gone.

 

Thanks Malacath

[Malacath]

I don't know how exactly it works, but it's something like this. All the default libraries (string, math...) are loaded in the GLOBAL environment wich of course also includes 'require'. But the MOD environment which you are in when coding inside modmain and modwordlgen is almost empty. It has all the functions to hook into prefabs and classes and so on but barely anything else. So you'll need to grab require from GLOBAL like

local require = GLOBAL.require

Edit: Damnit, you ninja'd me  xD

Try using

file:write("Adding Follower: "..tostring(v).."\n")    

I don't know if entities automatically get converted when trying to concatenate them.

EDIT: Probably you even need

local tostring = GLOBAL.tosring

Edited December 1, 2013 by Malacath

[magnanimousness]

haha, yeah I face palmed pretty hard when I saw I was missing the GLOBAL.require line.

 

Okay the tostring worked perfectly, didnt need to add the GLOBAL.tostring() so it looks like thats added automatically.

 

Thanks for the assist Malacath, much appreciated.

[simplex]

haha, yeah I face palmed pretty hard when I saw I was missing the GLOBAL.require line.

 

Okay the tostring worked perfectly, didnt need to add the GLOBAL.tostring() so it looks like thats added automatically.

 

Thanks for the assist Malacath, much appreciated.

You can also do simply

io = GLOBAL.io

instead of require()'ing it. And it's best to do something like

file = io.open(MODROOT.."test.txt", "w")

instead, so the file will be placed inside your mod folder.