Re: [O] Restrict include to some backend

[Kaushal Modi]

On Wed, Sep 14, 2016 at 8:21 AM Clément Pit--Claudel <address@hidden> wrote:

Back when I wrote this I was starting out with Org-mode, I was in a hurry, and I didn't know about org-export-before-processing-hook :) So instead I had a larger ELisp script that opened the file, ran this filter, then called org-latex-export-to-latex :)

 

:)

 

Looks good. Maybe using the same syntax for both would be good though; something like "BEGIN_ONLY tex" and "BEGIN_ONLY :not tex" maybe?

Thanks. I was exactly my earlier syntax idea but I scrapped it! 

 

We could probably get rid of the "tex" part after the END_ONLY, and change "tex" to "latex" for consistency with BEGIN_EXPORT :)

I thought of removing that too. But then thought of keeping it in case we want to support nesting of these blocks.. I haven't yet needed to have anything like this, but below is a rough idea.

#+BEGIN_EXCEPT tex

something

#+BEGIN_EXCEPT html

else

#+END_EXCEPT html

#+END_EXCEPT tex

I haven't tested this, but based on the code, nesting anyways doesn't work as of now I believe.

Below is a modification of your code.

(defun cpit/filter-begin-only (type)

  "Remove BEGIN_ONLY %s blocks whose %s doesn't equal TYPE.

For those that match, only remove the delimiters.

On the flip side, for BEGIN_EXCEPT %s blocks, remove those if %s equals TYPE. "

  (goto-char (point-min))

  (while (re-search-forward " *#\\+BEGIN_\\(ONLY\\|EXCEPT\\) +\\([a-z]+\\)\n" nil t)

    (let ((only-or-export (match-string-no-properties 1))

          (block-type (match-string-no-properties 2))

          (begin-from (match-beginning 0))

          (begin-to (match-end 0)))

      (re-search-forward (format " *#\\+END_%s +%s\n" only-or-export block-type))

      (let ((end-from (match-beginning 0))

            (end-to (match-end 0)))

        (if (or (and (string= "ONLY" only-or-export)

                     (string= type block-type))

                (and (string= "EXCEPT" only-or-export)

                     (not (string= type block-type))))

            (progn                      ; Keep the block,

                                        ; delete just the comment markers

              (delete-region end-from end-to)

              (delete-region begin-from begin-to))

          ;; Delete the block

          (message "Removing %s block" block-type)

          (delete-region begin-from end-to))))))

(add-hook 'org-export-before-process #'cpit/filter-begin-only) 

--

Kaushal Modi