Re: Bug: org-attach-follow with wrong-number-of-arguments [ ( @ /home/sbrass/.emacs.d/elpa/org-9.4.4/)]

["Simon Braß" <simon_brass@gmx.de>]

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Thanks for an answer, in any place first :).

Am Di., 6. Apr. 2021 um 05:46 Uhr schrieb Kyle Meyer <kyle@kyleam.com>:

> [ Sorry for the slow reply. ]
>
> Simon Braß writes:
>
> > Hi all,
> >
> > I've tried to open an attached file (added with org-attach-attach),
> however,
> > when I try to open it with C-c C-o I got the following backtrace:
> >
> > #+begin_example
> > Debugger entered--Lisp error: (wrong-number-of-arguments (2 . 2) 1)
> >   org-attach-follow("1805.00020.pdf")
> >   org-link-open((link (:type "attachment" :path "1805.00020.pdf" :format
> > bracket :raw-link "attachment:1805.00020.pdf" :application nil
> > :search-option nil :begin 717 :end 818 :contents-begin 746 :contents-end
> > 816 :post-blank 0 :parent (paragraph (:begin 717 :end 819 :contents-begin
> > 717 :contents-end 819 :post-blank 0 :post-affiliated 717 :parent (item
> > (:bullet "- " :begin 708 :end 819 :contents-begin 717 :contents-end 819
> > :checkbox off :counter nil :structure (... ... ... ... ...) :pre-blank 0
> > :post-blank 0 :post-affiliated 708 :tag nil :parent (plain-list
> ...)))))))
> > nil)
> >   org-open-at-point(nil)
> >   funcall-interactively(org-open-at-point nil)
> >   call-interactively(org-open-at-point nil nil)
> >   command-execute(org-open-at-point)
> > #+end_example
>
> Hmm, this looks like an inaccessible state for Org 9.4.4.  Here's how
> org-link-open would handle an attachment type:
>
>   (let ((f (org-link-get-parameter type :follow)))
>     (when (functionp f)
>       ;; Function defined in `:follow' parameter may use a single
>       ;; argument, as it was mandatory before Org 9.4.  This is
>       ;; deprecated, but support it for now.
>       (condition-case nil
>           (funcall (org-link-get-parameter type :follow) path arg)
>         (wrong-number-of-arguments
>          (funcall (org-link-get-parameter type :follow) path)))))
>
> So it first calls with the expected 2 arguments and then falls back to
> the single one.
>
Thanks, good to know. I'm clearly not a Lisp expert...

Follow attachment links works okay on my end, and, aside from a mixed
> installation, I can't think of a way to get into that state.
>
>   https://orgmode.org/worg/org-faq.html#mixed-install
>
> > After adding =&optional= to the definition of =org-attach-follow=, and
> > reloading org-mode (uncompiled) I could get through org-attach-follow.
> > But, then I hit another issue:
> >
> > #+begin_example
> > Debugger entered--Lisp error: (void-function org-link-open-as-file)
> >   (org-link-open-as-file (org-attach-expand file) arg)
> >   org-attach-follow("0906.4487.pdf")
> >   …
> > #+end_example
>
> That function was added in 9.4 and is in the same file as the caller,
> org-link-open.  The fact that it's not defined also points to a mixed
> install, with an older ol.el taking precedence.
>

It seems to work with the recent Emacs version: GNU Emacs 27.2 (build 1,
x86_64-pc-linux-gnu, GTK+ Version 3.24.27, cairo version 1.17.4) of
2021-03-26.
So, it actually points to a mixed installation on my side.
Next time I will follow the instructions in
https://orgmode.org/manual/Feedback.html more carefully, and remind myself
of a possible mixed installation.

Thanks, again, Kyle for your answer.

Cheers,
Simon

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