Sometimes I need to share a variable among
submodules inside the same package.
Surely, if you arrange your packages so that instead of a bunch of
submodules at the same level in the "package tree," there is one master
module with the submodules below that, then you can require the master
module first in order to define your package-specific variables, before
requiring the various submodules.
For example (assuming you have './?/init.lua' in your package.path along
with the more traditional './?.lua'):
fruit/init.lua
fruit/banana.lua
fruit/mango.lua
Then in your main program you:
require "fruit"
and in fruit/init.lua you:
module(...)
greengrocer = true -- package-visible variables
require "fruit.banana"
require "fruit.mango"
Inside the submodules you can do something like:
local shared = package.loaded[(...):match("%w*")]
just before you do your:
module(...)
and then your package-only variables will be available in the submodules
as:
shared.greengrocer
etc.
