Re: official orgmode parser

["Przemysław Kamiński" <pk@intrepidus.pl>]

On 9/15/20 2:37 PM, tomas@tuxteam.de wrote:
> On Tue, Sep 15, 2020 at 01:15:56PM +0200, Przemysław Kamiński wrote:
> 
> [...]
> 
>> There's the org-json (or ox-json) package but for some reason I
>> wasn't able to run it successfully. I guess export to S-exps would
>> be best here. But yes I'll check that out.
> 
> If that's your route, perhaps the "Org element API" [1] might be
> helpful. Especially `org-element-parse-buffer' gives you a Lisp
> data structure which is supposed to be a parse of your Org buffer.
> 
>  From there to S-expression can be trivial (e.g. `print' or `pp'),
> depending on what you want to do.
> 
> Walking the structure should be nice in Lisp, too.
> 
> The topic of (non-Emacs) parsing of Org comes up regularly, and
> there is a good (but AFAIK not-quite-complete) Org syntax spec
> in Worg [2], but there are a couple of difficulties to be mastered
> before such a thing can become really enjoyable and useful.
> 
> The loose specification of Org's format (arguably its second
> or third strongest asset, the first two being its incredible
> community and Emacs itself) is something which makes this
> problem "interesting". People have invented lots of usages
> which might be broken should Org change to a strict formal
> spec. You don't want to break those people.
> 
> But yes, perhaps some day someone nails it. Perhaps it's you :)
> 
> Cheers
> 
> [1] https://orgmode.org/worg/dev/org-element-api.html
> [2] https://orgmode.org/worg/dev/org-syntax.html
> 
>   - t
> 

So I looked at (pp (org-element-parse-buffer)) however it does print out 
recursive stuff which other schemes have trouble parsing.

My code looks more or less like this:

(defun org-parse (f)
   (with-temp-buffer
     (find-file f)
     (let* ((parsed (org-element-parse-buffer))
            (all (append org-element-all-elements org-element-all-objects))
            (mapped (org-element-map parsed all
                      (lambda (item)
                        (strip-parent item)))))
       (pp mapped))))


strip-parent is basically (plist-put props :parent nil) for elements 
properties. However it turns out there are more recursive objects, like

:title
           #("Headline 1" 0 10
             (:parent
              (headline #2
                            (section

So I'm wondering do I have to do it by hand for all cases or is there 
some way to output only a simple AST without those nested objects?

Best,
Przemek