Re: Lua Unofficial FAQ Addition

[Dimiter 'malkia' Stanev <malkia@...>]

What I'm doing is this:

Make a folder named "1", and put in there "1/a.lua" and "1/b.lua"

-- 1/a.lua
print("_G.arg[0] = [".._G.arg[0]..']')
print("      ... = [".. tostring(... and ... or "<null>") ..']')

and then

-- 1/b.lua
print("require('1/a')")
require( "1/a" )
print()
print("dofile('1/a')")
dofile( "1/a.lua" )

Experiment with it. So basically it boils down to _G.arg[0] and ...
... is only not null when a module was required. Here is what it prints 
here:


E:\p\lua-testing\1>cd ..

E:\p\lua-testing>lua 1/a.lua
_G.arg[0] = [1/a.lua]
      ... = [<null>]

E:\p\lua-testing>lua 1/b.lua
require('1/a')
_G.arg[0] = [1/b.lua]
      ... = [1/a]

dofile('1/a')
_G.arg[0] = [1/b.lua]
      ... = [<null>]

E:\p\lua-testing>lua
Lua 5.1.4  Copyright (C) 1994-2008 Lua.org, PUC-Rio
> dofile('1/a.lua')
_G.arg[0] = [<null>]
      ... = [<null>]
> dofile('1/b.lua')
require('1/a')
_G.arg[0] = [<null>]
      ... = [1/a]

dofile('1/a')
_G.arg[0] = [<null>]
      ... = [<null>]
> require('1/a')
> require('1/b')
require('1/a')

dofile('1/a')
_G.arg[0] = [<null>]
      ... = [<null>]

On 10/5/2011 10:36 AM, Rob Hoelz wrote:
> Hello list,
>
> I assume the maintainer of luafaq.org lurks this list, so I have a
> question/answer I'd like added to the FAQ.
>
> "How do I tell require to search relative to the current module?"
>
> I've seen this question asked a dozen times on the list; it'd be nice
> to be able to direct people to a consistent answer.
>
> -Rob