How can I pass parameters to a Lua file when loading it from another Lua file?

Question

I need some help on parsing the Command Line for a lua file. I am executing a lua file and that lua file has a command "dofile(2nd.lua-file)", but, I want to pass some argument to this 2nd lua file through this 1st lua file.

example- a.lua has dofile("b.lua"), and now I have to pass some argument to b.lua through this a.lua and how can I do this.

lhf · Accepted Answer · 2012-03-19 21:48:11Z

30

Try this. In file `a.lua':

assert(loadfile("b.lua"))(10,20,30)

In file b.lua:

local a,b,c=...

or

local arg={...}

The arguments to b.lua are received as varargs, hence the ....

edited Mar 19, 2012 at 21:48

answered Mar 16, 2012 at 21:29

lhf

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2 Comments

Invictus Over a year ago

I am getting the following error when I run it with dofile(b.lua)(10), I get "unexpected symbol near '.'" and my b.lua as the following local a=.

lhf Over a year ago

@Invictus, it's three dots ... as posted. That's the Lua syntax for varargs. Try it.

B. Go · Accepted Answer · 2019-11-28 06:22:51Z

1

An easy way:

Command and output:

C:\LUAWORK\Estudio-Tut>lua -e "a=2 b=3 c=4 dofile(‘argu.lua’)"

2 3 4

4 6 8

File 1, argu.lua:

print (a , b ,c)
a=2*a
b=2*b
c=2*c
dofile ( ‘otro.lua’)

File 2, otro.lua:

print (a ,b, c)

Using -e "……." I set globals in the call to any chain of modules

edited Nov 28, 2019 at 6:22

B. Go

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answered Nov 28, 2019 at 0:15

user3930978

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