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+;;; ob-fomus.el --- Org-babel functions for fomus evaluation
+;; Copyright (C) 2011-2013 Torsten Anders
+;; Author: Torsten Anders
+;; Keywords: literate programming, reproducible research
+;; Homepage: http://orgmode.org
+;; This file is not part of GNU Emacs.
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+;; Org-Babel support for evaluating Fomus source code.
+;; For information on Fomus see http://fomus.sourceforge.net/
+;; This differs from most standard languages in that
+;; 1) there is no such thing as a "session" in fomus
+;; 2) we are generally only going to return results of type "file"
+;; 3) we are adding the "file" and "cmdline" header arguments
+;; 4) there are no variables (at least for now)
+ '((:results . "file") (:exports . "results"))
+ "Default arguments to use when evaluating a fomus source block.")
+(defun org-babel-expand-body:fomus (body params)
+ "Expand BODY according to PARAMS, return the expanded body."
+ (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
+ (lambda (pair)
+ (let ((name (symbol-name (car pair)))
+ (value (cdr pair)))
+ (setq body
+ (concat "\$" (regexp-quote name))
+ (if (stringp value) value (format "%S" value))
+(defun org-babel-execute:fomus (body params)
+ "Execute a block of Fomus code with org-babel.
+This function is called by `org-babel-execute-src-block'."
+ (let* ((result-params (cdr (assoc :result-params params)))
+ (out-file (cdr (assoc :file params)))
+ (cmdline (cdr (assoc :cmdline params)))
+ (cmd (or (cdr (assoc :cmd params)) "fomus"))
+ (in-file (org-babel-temp-file "fomus-" ".fms")))
+ (with-temp-file in-file
+ (insert (org-babel-expand-body:fomus body params)))
+ ;; TMP: testing
+ ;; (message (concat cmd
+ ;; " " (org-babel-process-file-name in-file)
+ ;; " " cmdline
+ ;; " -o " (org-babel-process-file-name out-file)))
+ (concat cmd
+ " " (org-babel-process-file-name in-file)
+ " " cmdline
+ " -o " (org-babel-process-file-name out-file)) "")
+ nil)) ;; signal that output has already been written to file
+(defun org-babel-prep-session:fomus (session params)
+ "Return an error because Fomus does not support sessions."
+ (error "Fomus does not support sessions"))
+;;; ob-fomus.el ends here