Re: relative load-file

[Rocky Bernstein <rocky@gnu.org>]

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On Fri, Nov 13, 2009 at 12:24 AM, grischka <grishka@gmx.de> wrote:

> > [...]
> > That is, one wants to load an Emacs Lisp file relative the file
>
> > that issues the load which is often in the same directory or a
> > nearby directory.
> >
> > This would be easy if there were a variable like __FILE__ that Ruby
> > provides.
>
> Why would you need __FILE__ if in emacs you can type much more easily
>   #$
> As in
>   (load (concat (file-name-directory #$) "extra-stuff"))
>

Never ascribe to willful intent that which can be easily explained by
ignorance :-)

I've just read up on this, and although it is appealing and another
heuristic that can be tried, it looks as though it too is sometimes gives
nil in cases where say (*car current-load-list)* works, just like *
load-file-name*. In fact I'd be curious to learn the differences between it
and *load-file-name.* Off hand, I'd guess that #$ persists after loading --
when it is set -- whereas *load-file-name* and the *car* don't, but
otherwise they are the same. Anyone know or care to comment?

Here is the test I tried. I put this in a file */tmp/foo.el:

*(message "++1 %s" #$)
(message "++2 %s" (car current-load-list))

When I eval-buffer I get:

++1 nil
++2 /tmp/foo.el

Of course if I* load-file* it, they both come out with the same file names.

Thanks for the idea and info!



> --- grischka
>
>

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