Re: [O] Exporting to multiple files

[Richard Lawrence]

Hi Marcin,

Marcin Borkowski <address@hidden> writes:
>
> I'd like to export an Org-mode file to /multiple/ HTML files.  For
> instance, I might want to convert all first and second level headings
> to files, and third-level headings to <h1>, fourth-level ones to <h2>
> inside these files etc.  Is that possible?  I looked into the docs, but
> didn't find anything like this.

I once wrote a function that does something like this.  (I haven't used
it since the pre-8.0 days, though, so it probably needs updating.)  It
creates individual PDFs from the subtrees under a headline, then
concatenates them into one PDF using an external program (pdftk).
Naming is done based on the EXPORT_FILE_NAME property as usual.  Maybe
you can use it as a skeleton:

#+BEGIN_SRC elisp
;; utilities for exporting the subtrees of a tree as individual PDFS
;; and as a single, concatenated PDF
(defun org-export-individual-pdfs-and-concat ()
  (interactive)
  (setq export-files nil
        pdf-files nil
        ; point must be in main tree to be exported (not a subtree)
        concat-pdf-name (get-property-or-fail (point) "CONCATENATED_PDF_NAME"))
  (progn
    (org-map-entries
     (lambda ()
       (setq org-map-continue-from (outline-next-heading))
       (org-mark-subtree)
       ; org-map-entries positions point at the beginning of each subtree
       (if org-map-continue-from ; non-nil if outline-next-heading found a 
heading
           (let ((org-trust-scanner-tags t))
             (push (get-property-or-fail (point) "EXPORT_FILE_NAME") 
export-files)))
       (mapcar 'message (org-get-tags))
       (org-export-as-pdf nil)) ; TODO: why doesn't this respect noexport tag?
     nil 'tree)
    (concat-pdfs (nreverse (mapcar 'tex-name-to-pdf-name export-files))
                 concat-pdf-name)))

(defun get-property-or-fail (pom property)
  (or
   ; probably some opportunity for optimization here...see function
   ; documentation for org-map-entries
   (org-entry-get pom property)
   (error (format "Entry at %s does not define property %s" 
(org-heading-components) property))))

(defun tex-name-to-pdf-name (filename)
  (concat (file-name-sans-extension filename) ".pdf"))

(defun concat-pdfs (in-files out-file)
  (shell-command
   (format "pdftk %s cat output %s"
           (mapconcat (lambda (s) s) in-files " ") ; join pdf names with spaces
           out-file)))

#+END_SRC

Another option that occurs to me -- though it may not serve your needs
-- is to export your Org file to texinfo format.  I believe the texinfo
compiler can then generate separate separate HTML files for the
different sections in your .texi file.  Might be worth a try.
 
-- 
Best,
Richard