Re: relative source paths; "source" debug info field

[Niklas Frykholm <niklas@...>]

> I want to be able to load
> other Lua files by both absolute and relative paths, relative to
> the script loading it.
>
> One way of doing this seems to be to pull the source path (of the
> caller of whichever helper is being used to load) from debug
> info.  (If it's not a @path, only allow absolute paths.)
>
> This suffers from using the debug API for non-debug tasks, and also
> requires being more careful about purging debug info.  I can't think
> of any other way of doing this, though.
Couldn't you override require() to keep track of the current path. In 
untested-pseudo-lua:

local context_stack = {}

function require(s)
   local context = context_stack[#context_stack]
   local path = resolve_path(s, context)
   if not package.loaded[path]
       table.insert(context_stack, path)
       package.loaded[path] = do_file(path) or true
       context_stack[#context_stack] = nil
   end
end

// Niklas