Ihor Radchenko <yanta...@posteo.net> writes:
> David Masterson <dsmaster...@icloud.com> writes:
>
>> Is there a way to export a section of an Org file only if the export
>> backend is *NOT* a particular backend? For instance, some things don't
>> work in Texinfo, but are fine in HTML and LATEX.
>>
>> Is there a generalized IF for processing an Org file?
>
> Nothing out of the box, but you can, for example, introduce a custom
> attribute that will control that.
>
> #+attr_all: :export (not texinfo)
> Some text _not_ for texinfo here.
>
> Then,
> (defun yant/org-export-conditional-export (data backend info)
> (org-element-map data org-element-all-elements
> (lambda (el)
> (pcase (car (read-from-string (or (org-export-read-attribute :attr_all
> el :export) "nil")))
> (`nil t)
> (`(not . ,backends)
> (when (member backend backends)
> (org-element-extract el)))
> (backends
> (unless (member backend backends)
> (org-element-extract el)))))
> info nil nil t)
> data)
> (add-to-list 'org-export-filter-parse-tree-functions
> #'yant/org-export-conditional-export)
Interesting. My elisp is not strong, so a few questions:
1. Are you saying attr_all does not exist in Org and this code is
creating it?
2. I assume 'backends' is a list I must create, correct?
3. What does the last argument ('t') to org-element-map do?
4. Doesn't org-element-map return data, so isn't the last data
unnecessary?
Thanks
--
David Masterson
