Is it possible to preload modules written in Lua passed as strings?

[fiatjaf]

Something like

L := lua.NewState()
defer L.Close()
L.PreloadString("mymodule", `
local mymodule = {}

function mymodule.foo()
    print("Hello World!")
end

return mymodule
`)
L.DoString(`
local mymodule = require "mymodule"
mymodule.foo()
`)

I imagine it should be possible, but can't find the correct documentation for it.

[yuin]

Since GopherLua is a Lua implementation, the same thing as original Lua is not documented in GopherLua.

Please refer to Lua 5.1 Reference manual and use package.preload .

[fiatjaf]

Sorry again, and thank you.

For future reference, here's what I ended up doing:

L := lua.NewState()
defer L.Close()
mod, err := L.LoadString(`
local mymodule = {}

function mymodule.foo()
    print("Hello World!")
end

return mymodule
`)
preload := L.GetField(L.GetField(L.Get(lua.EnvironIndex), "package"), "preload")
L.SetField(preload, "mymodule", mod)

then

L.DoString(`
local mymodule = require "mymodule"
mymodule.foo()
`)

[mofirouz]

Thank you so so so much for this - saved hours on end trying to figure this out

[tooolbox]

This should probably be in the README.