CODEWITHSUNDEEP
propertieslua
mpalmier73
mpalmier73

Reputation: 27

Lua - load properties into table

I would like to load a config.lua file containing global variables so that I can wrap and then access those variables into a local table.

config.lua looks like this:

prop01=value01
prop02=value02

script.lua would look like this

-- fragment starts --
local config = {
   -- something goes here
}
-- fragment end --

print (config.prop01) -- should print "value01"
print (config.prop02) -- should print "value02"

How can I change the "fragment" to get expected printout?

Upvotes: 1

Views: 552

Answers (1)

Dimitry
Dimitry

Reputation: 2358

Swap the environment when loading the config file.

In lua 5.3 it is done using functions load or loadfile documented here:

local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()

In lua 5.1 you will need to use setfenv function:

local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()

The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.

All that assuming that config.lua is a valid script that is setting some global variables.

Upvotes: 1

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