[O] Emacs shell-script to tangle org-babel at the command line.

[Matthew Oesting]

I recently wrote what I thought to be a very simply she'll script to tangle a 
file; simply call the script on a file, e.g. 'tangle corgi.org' and a file, 
'corgi.rb' (assuming one uses Ruby) appears in the local directory.

Tangling the file from within Emacs works normally.  Tangling from this script 
does not work; the only interesting response is "tangled 0 code blocks from 
corgi.org".  The same file tangles two blocks from within Emacs.

It seems that the org-babel-tangle function is using some piece of information 
present in the normal Emacs loading sequence which is not found during the 
script load.  I could provide a large number of files, but I imagine that the 
problem will be obvious to someone here.

What is wrong with this code?

#!/usr/bin/emacs --script

;; The subdirectory ~/.emacs.d is to be added to the top-level elisp
;; file search.
(progn (cd "~/.emacs.d") (normal-top-level-add-subdirs-to-load-path))

;; Org-Mode, Org-Babel, and the tangle library are required, if we are
;; to proceed further.
(require 'org-install)
(require 'org)
(require 'ob-tangle)

;; Load the main configuration and setup file.
(require 'ob-ruby)
(require 'ob-python)
(require 'ob-emacs-lisp)
(require 'ob-lisp)

;; Tangle all files given.
(dolist (file command-line-args-left) 
 (princ file)
 (org-babel-tangle-file file))