Re: Modules with standalone main program

["Soni \"They/Them\" L." <fakedme@...>]

On 2018-02-27 12:42 AM, albertmcchan wrote:
> On Feb 26, 2018, at 10:01 PM, Dirk Laurie <dirk.laurie@gmail.com> wrote:
>
> > You changed the rules first by monkey-patching 'require'. Why should
> > the undocumented 'package.loading' be a holy cow if the
> > well-documented 'require' has already been slaughtered?
> just to be clear, patching require is to fix a bug.
>
> package.loading function does not need to touch any lua c code.
> It is just as easy to test against the userdata sentinel.
>
> if mod.lua return false, require "mod" will set package.loaded.mod to false.
> --> require 'mod' can potientially load mod.lua multiple times.
>
> I read the original Roberto package proposal dated 9/17/2004,
> it will not allow false (or nil) into package.loaded cache table:
>
> https://marc.info/?l=lua-l&m=113878469246850&w=2
>
> for some reason, translated c implementation is slightly different.
>
> Since I am fixing require, I just use false as the sentinel,
> and code package.loading function in lua instead of c.

Here's an idea:

if debug.getinfo(2).func == require then
    -- required
elseif debug.getinfo(2).func == dofile then
    -- dofiled
else
    -- loadfiled, luaed, etc
end

(also try my lua script: debug.getinfo(2).func())

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