Re: info/info+ (23.1.50/EmacsW32) - Error creating toplevel dir menu

[Lennart Borgman]

On Sun, Jan 10, 2010 at 9:15 PM, Geek4AllSeasons
<Geek4AllSeasons@hotmail.com> wrote:
>
> A problem creating the toplevel dir menu (C-h i) was corrected with changes
> below. Comments/suggestions would be appreciated on:
>
> 1. appropriate list/forum


Is the problem perhaps in info+.el? In that case try to contact the
author of that package.

The problem is perhaps not there, but that will be a good starting point.


> 2. change correctness
> 3. issues (regarding 2.)
>
> After upgrading to EmacsW32+Emacs20091103 (patched) the toplevel dir menu
> went missing. "Can't find dir or any compressed version of it" appears in
> *messages*/*backtrace*.
>
> After some Edebug hacking I found a mismatch in the "filename" parameter
> being passed down from:
> [info](Info-directory)->
> [info](Info-find-node "dir" "top")->
> [info+](Info-find-node-2 "dir" "top" )
>
> The Dir menu was created after the following change was made in in
> [info+]Info-find-node-2:
>
> --- /cygdrive/d/Download/Emacs/info+.el 2010-01-10 18:09:46.262804400 +0000
> +++ /cygdrive/c/Software/Emacs/site-lisp/auto-install/info+.el  2010-01-10
> 18:20:21.967298700 +0000
> @@ -1463,8 +1463,9 @@
>                        buffer-file-name nil)
>                  (erase-buffer)
>                  (cond
> -                   ((eq filename t)
> -                    (Info-insert-dir))
> +                   ((or (eq filename t)
> +                       (equal filename "dir"))
> +                   (Info-insert-dir))
>                    ((eq filename 'apropos)
>                     (insert-buffer-substring " *info-apropos*"))
>                    ((eq filename 'history)
>
> The fix was made in info+.el to localize side effects and due to limited
> knowledge of dependencies/design intent. The underlying problem maybe in the
> "virtual" info logic. There may be a shortcircut between filename and
> nodename semantics. Info-find-node calls Info-find-file. The first and only
> case executed there is:
>
> (Info-virtual-call (Info-virtual-fun 'find-file "dir" nil) "dir" noerror))
>
> The problem is/was caused by 'find-file mapping to Info-directory-find-file,
> which just returns the unchanged filename. 'find-node would map to
> Info-directory-find-node, which calls Info-insert-dir (see above).
>
> --
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> Sent from the Emacs - Help mailing list archive at Nabble.com.
>
>
>
>