None of them work. Maybe I'm doing something wrong.

I have my project file (say, "main.tex") in a folder (say, "Main") and projects in a subfolder (say "Products").
I've written some Lua macros in a file (say, "foo.lua") and I need all the products to be able to call those Lua functions, so I tried loading them in the project file ("foo.lua" and "main.tex" are in the same folder, whereas products are in the subfolder). \usepath works for finding other files, such as images, so I don't know what is going on. I'm attaching a test project.

El dom., 5 de abr. de 2020 a la(s) 09:28, Wolfgang Schuster (wolfgang.schuster.lists@gmail.com) escribió:
Jairo A. del Rio schrieb am 05.04.2020 um 15:00:
> I'm writing a project in ConTeXt MKIV and I want to load some (pure) Lua
> libraries and bindings (defining \ctxlua and the like). For instance, I
> have the file foo.lua with some macros and I want to use them in my
> project. Something like this:
>
> \startproject project
> %\component foo.lua %This does not work
> %\environment foo.lua %This does not work
> %\input foo.lua %This does not work
> %\directlua{dofile("foo.lua")} %This does not work even when the project
> file and foo.lua are in the same folder.
> \stopproject
>
> What should I do? Thank you in advance.

1. \luaenvironment <file>

2. \useluamodule [<file>]

3. \ctxloadluafile {<file>}

4. \loadluafile [<file>] or \loadluafileonce [<file>]

Wolfgang