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On Sat, Sep 24, 2022 at 2:51 AM Sean Conner <> wrote:

>   So I suppose you have something like:
>         do
>           local lua_require = require
>           local function new_require(modname)
>             if allowed_module(modname) then
>               return lua_require(modname)
>             else
>               error(string.format("module %s not allowed\n",modname))
>             end
>           end
>           require = new_require
>         end

Not really, as I explained in another message, but I can have that, too.

Just to make sure I understand your idea, I will rephrase it:

The normal environment has 'require' that applies policy A.

If it decides that the require request for X should be satisfied, it
loads X with a modified environment, whose 'require' will apply policy


It seems that I should also separate 'package.loaded', otherwise Y
(loaded by X) may become loadable by the main script (see my other
email to Egor that describes the main/X/Y example setup).