To get back on this, I have currently solved it in the following way:
###/lib/nodebb.js:
###library.js:
var NodeBB = require('./lib/nodebb');###/lib/submoduleX.js:
var NodeBB = module.require('./nodebb'), db = NodeBB.db, User = NodeBB.User, Plugins = NodeBB.Plugins;##Why this works
I read somewhere that require caches the files you load. That means that if require my nodebb.js from library.js, I can later load nodebb.js from any submodule I want and it will work.
