indeed, you should only use that before parsing hook for non-latex exports.

See the documentation for  org-export-before-parsing-hook. You need to
write a function that takes one argument and does nothing for latex, and
calls the csl processor otherwise.
perhaps something like this:

(defun org-ref-preprocessing (backend)
  (unless (eq backend 'latex)
    (org-ref-csl-preprocess-buffer backend)))

(setq org-export-before-parsing-hook '(org-ref-preprocessing))


John

-----------------------------------
Professor John Kitchin (he/him/his)
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
https://kitchingroup.cheme.cmu.edu
https://pointbreezepubs.gumroad.com/ pycse bookstore



On Wed, Jul 20, 2022 at 10:48 AM Joseph Vidal-Rosset <
joseph@vidal-rosset.net> wrote:

>
> Le 20/07/2022 à 16:20, Joseph Vidal-Rosset a écrit :
> >
> >
> > Le 20/07/2022 à 15:38, John Kitchin a écrit :
> >
> >>     (let  ((org-export-with-broken-links t)
> >>            (org-latex-pdf-process
> >>              '("pdflatex -interaction nonstopmode -shell-escape
> >>     -output-directory %o %f"
> >>               "bibtex %b"
> >>               "makeindex %b"
> >>               "pdflatex -interaction nonstopmode -shell-escape
> >>     -output-directory %o %f"
> >>               "pdflatex -interaction nonstopmode -shell-escape
> >>     -output-directory %o
> >>     %f")))
> >>         (org-open-file (org-latex-export-to-pdf)))
> >>
> >>
> >> this doesn't do anything in your init file to change anything. it only
> >> temporarily (let) defines some variables, and then tries to export the
> >> current buffer (an elisp file) to pdf and open it. that is a mistake
> >> to try.
> >
> > You are certainly right. I believe that these lines block a
> > configuration file that is responsible for the fact that the export via
> > pdflatex does not work correctly. This file is therefore loaded after
> > myorgexport.el, like mysnippets.el  that is not loaded, for example. It
> > is also possible that myorgexport.el itself is somewhere incorrect.
> >
> > I will go to make tests, I'll keep you informed.
>
> The BIG advantage of launching Emacs Prelude with emacs --daemon is that
> it is possible to identify (with your help in this case, John) the
> reason of  a problem in such or such setup, every personal setup being
> located in possible several small files  ~/.emacs.d/personal/myfile1.el,
>   ~/.emacs.d/personal/myfile2.el, etc.
> (I am really thankful to Bozhidar Batsov - hence this cc. to his email
> address - and to all the contributors of Prelude Emacs, and I recommend
> this nice starter kit for Emacs.)
>
> John, you kindly gave me a solution to get the bibliography in an html
> email exported via gnus and orgmode, and in my
> .emacs.d/personal/myorgmime.el I had this line of code:
>
> > (setq org-export-before-parsing-hook '(org-ref-csl-preprocess-buffer))
> ;; to get the bibliography in email (thanks to John Kitchin)
>
> Deactivated, the export in pdflatex works correctly for the
> bibliography... I now have to find a coherent way to get both exports of
> bibliography...
>
> Many thanks John for your so kind, so constant, and so patient help !
>
> All the best,
>
> Jo.
>
>