Micro: Help needed new go standard library bindings to lua for plugin

[tommyshem]

Trying to do a plugin with the new go standard library lua bindings but I can not get it to work. Below is the code. (I am new to lua)
Anyone got any ideas ?

 local ioutil = import("io/ioutil")
 local files , err = ioutil.ReadDir(".")
    if err ~= nil then
        messenger:Error("Error reading directory in filemanager plugin.")
    else
        for file in files do
                list[i] = file.Name()
            i = i + 1
        end
    end

It should list current directory filenames in a list.

version: 1.3.4-72
Commit hash: d6ccaf0
OS: Linux Arch
Terminal: Gnome

[zyedidia]

There are a couple problems with your program. The main one is that the for loop should be for i = 1, #files do, and then use files[i] to access the file. Here is a working version doing what you want:

local ioutil = import("io/ioutil")
local files, err = ioutil.ReadDir(".")
local list = {}
if err ~= nil then
    messenger:Error("Error reading directory in filemanager plugin.")
else
    for i = 1, #files do
        list[i] = files[i]:Name()
    end
end

Extra notes: you should also use file:Name() instead of file.Name() to call the function and you need to define the list variable.

[tommyshem]

Thank you for the quick response.
I have tested and it works perfect.
I have been trying to do this for hours. (Testing different things and googling lua pages)
Thanks again.

[tommyshem]

What does # mean in front of files in the for loop.
Is there any good websites or books on lua ?

[zyedidia]

The #files means length of the files array.

I'm not really sure what the best website/book for learning lua is but I sometimes end up reading things from this tutorial on lua.org. Things might be a bit different because you may want to call the go stdlib from Lua instead of the Lua stdlib (although the lua stdlib should be mostly supported).

[tommyshem]

Ok, thank you for all your help.
You have saved me hours and a lot of hair pulling.
I was going in circles.

I think the help plugins example is wrong for the ioutl.ReadFile
This is in the example.

local ioutil = import("ioutil")

This is what I had to use to get it to work with ReadDir

local ioutil = import("io/ioutil")

[zyedidia]

Yep, that has been fixed now.