From baa83dacc732c51e15a593b02218bc5f9ef7fb2e Mon Sep 17 00:00:00 2001
From: Eric Schulte <schulte.eric@gmail.com>
Date: Fri, 8 Jul 2011 08:19:47 -0600
Subject: [PATCH] support for fomus code blocks added to contrib

  Thanks to Torsten Anders for contributing this functionality
---
 contrib/babel/langs/ob-fomus.el | 93 +++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 contrib/babel/langs/ob-fomus.el

diff --git a/contrib/babel/langs/ob-fomus.el b/contrib/babel/langs/ob-fomus.el
new file mode 100644
index 000000000..78fd8fdf8
--- /dev/null
+++ b/contrib/babel/langs/ob-fomus.el
@@ -0,0 +1,93 @@
+;;; ob-fomus.el --- org-babel functions for fomus evaluation
+
+;; Copyright (C) 2011 Torsten Anders
+
+;; Author: Torsten Anders
+;; Keywords: literate programming, reproducible research
+;; Homepage: http://orgmode.org
+;; Version: 
+
+;;; License:
+
+;; 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.
+
+;;; Commentary:
+
+;; 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)
+
+;;; Code:
+(require 'ob)
+(require 'ob-eval)
+
+(defvar org-babel-default-header-args:fomus
+  '((: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))))
+    (mapc
+     (lambda (pair)
+       (let ((name (symbol-name (car pair)))
+	     (value (cdr pair)))
+	 (setq body
+	       (replace-regexp-in-string
+		(concat "\$" (regexp-quote name))
+		(if (stringp value) value (format "%S" value))
+		body))))
+     vars)
+    body))
+
+(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)))
+    (org-babel-eval
+     (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"))
+
+(provide 'ob-fomus)
+
+;;; ob-fomus.el ends here