re: org-export-htmlize , "Symbol's value as variable is void"

Here's my .emacs file.  The line that sets org-babel-tangle-lang-exts is commented out.  Further down, is the debugging output when emacs is started.  Requiring ob-R doesn't generate an error, by either ob-ruby or ob-python will, unless org-babel-tangle-lang-exts is set.  The call to ob-ruby that generates the error, at the bottom of .emacs, is definitely coming after 'org-install.

Thanks again,

Nik


(setq load-path
       (append (list nil
"/usr/local/share/emacs/site-lisp"
"/Users/nputnam/elisp/ruby-mode"
         )           
load-path))

(require 'org-install)

(add-to-list 'auto-mode-alist '("\\.org\\'" . org-mode))
(global-set-key "\C-cl" 'org-store-link)
(global-set-key "\C-ca" 'org-agenda)
(global-set-key "\C-cb" 'org-iswitchb)

(global-font-lock-mode 1)                     ; for all buffers
(add-hook 'org-mode-hook 'turn-on-font-lock)  ; Org buffers only
(transient-mark-mode 1)

;(setq org-babel-tangle-lang-exts '("fortran" . "f"))
;(setq org-babel-tangle-lang-exts '())

(setq org-babel-do-load-languages
 '((R . t)
         (ditaa . nil)
         (dot . nil)
         (emacs-lisp . t)
         (gnuplot . t)
         (haskell . nil)
         (ocaml . nil)
         (python . t)
         (ruby . t)
         (screen . nil)
         (sh . t)
         (sql . nil)
         (sqlite . nil)))



(require 'ob-R)
;(require 'ob-python)
(require 'ob-ruby)



Here is the emacs debugging output:
Debugger entered--Lisp error: (void-variable org-babel-tangle-lang-exts)
  add-to-list(org-babel-tangle-lang-exts ("ruby" . "rb"))
  byte-code("\301\302!\210\301\303!\210\301\304!\210\301\305!\210\306\307\310\"\210\311^HB^P\312\311!\204$^@\313\311\314\"\210\314\207" [current-load-list$
  require(ob-ruby)
  eval-buffer(#<buffer  *load*> nil "/Users/nputnam/.emacs" nil t)  ; Reading at buffer position 958
  load-with-code-conversion("/Users/nputnam/.emacs" "/Users/nputnam/.emacs" t t)
  load("~/.emacs" t t)
  #[nil "^H\205\276^@   \306=\203^Q^@\307^H\310Q\202A^@ \311=\2033^@\312\307\313\314#\203#^@\315\202A^@\312\307\313\316#\203/^@\317\202A^@\315\202A^@   \3$
  command-line()
  normal-top-level()





On Wed, Jul 7, 2010 at 10:29 PM, Eric Schulte <schulte.eric@gmail.com> wrote:
Hi Nicholas,

I'm happy that you're enjoying Org-mode.

Nicholas Putnam <nputnam@gmail.com> writes:

> I'm new to, but loving playing with org-mode.  Thanks for this excellent
> code!
>
> I followed the directions for checking out the latest version with git, so
> have been trying to catch up to the new configuration for babel, at the same
> time that I'm learning the ropes of org-mode.
>
> I am finding that babel will not work unless org-babel-tangle-lang-exts is
> set -- else I get the following error:
>
> "Symbol's value as variable is void: org-babel-tangle-lang-exts"
>
> Adding "(setq org-babel-tangle-lang-exts '("fortran" . "f"))" to my
> .emacs file (even though I'm not using fortran for anything) fixes
> this problem.
>

I'm having trouble reproducing this problem.  As far as I can tell
`org-babel-tangle-lang-exts' is only called from language specific files
which should be required after that variable has been defined.

Is it possible that your configuration is loading language-specific
files or touching org-babel-load-languages before you are calling
(require 'org-install)?

>
> Also, I'm trying to get syntax highlighting of source code elements in
> HTML export.  Export looks great, but the code snippets are being
> exported inside <pre class="example"> tags, without any other markup.
> Can anyone point me in the right direction?
>

Is the `org-export-htmlize' set to a non-nil value on your system?  If
so then that could be the cause of the problem.  If it is set to a
truthy value, and htmlize-region is defined in your Emacs, then I'm not
sure what the problem could be.

Best -- Eric

>
> Cheers,
>
> Nik Putnam
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