Best way to set LUA_PATH?

[kabukky]

Hi,
I love working with gopher-lua so far. The documentation is lacking tough.
What would be the best way to set the LUA_PATH? In order to load modules from subdirectories located relative to the executed .lua file, I need to set it to the directory of that .lua file.
I discovered that the Lua vm uses system env variables set via os.Setenv(). Is there a way to set / append to the LUA_PATH just for one vm (e.g. vm.Setenv())?

Thanks

[yuin]

Hi.

Thanks for working with GopherLua.
You can do it in much the same way as the original Lua implementation.
package.path is the path used by require to search for a GopherLua loader.

The best way that you might want is to set package.path as follows:

local script_path = _getscriptdir() -- implement in your host golang program
package.path = script_path .. [[/subdir/?.lua;]] .. package.path

[kabukky]

That seems sensible, thank you :)
But I'm getting this error when executing test.lua:

[G]: plugins line:1(column:1) near '�':   Invalid token

stack traceback:
    [G]: in anonymous function
    [G]: in require
    test.lua:2: in main chunk
    [G]: ?

I have a test.lua and a testmod.lua, both in the same directory.

Here's what my lua.test looks like (getCurrentDir() returns ";/absolute/path/to/script/dir"):

package.path = package.path .. getCurrentDir()
require "testmod"
print(testmod.foo())

Here's what my testmod.lua looks like:

local testmod = {}

function testmod()
    return "Hello World!"
end

return testmod

I'm new to Lua, so please excuse me if this is obvious. But from what I gather from the reference, this should load the module, right?

Thanks

[yuin]

package.path = package.path .. getCurrentDir()

to

package.path = package.path .. getCurrentDir() .. [[/?.lua]]

Refer to Lua5.1 - package.loaders section for further information.

[kabukky]

Thank you so much, I forgot about the .lua wildcard.
I'm using GopherLua to drive the plugin system of Journey now :)