X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/7c420169baa7c50428589cca7f8eda71b462eb15..d7aff0d6929c16d15992304dd44c5f528df8f895:/lisp/org/ob-mscgen.el

diff --git a/lisp/org/ob-mscgen.el b/lisp/org/ob-mscgen.el
index 98230da56a..209ad7dcc3 100644
--- a/lisp/org/ob-mscgen.el
+++ b/lisp/org/ob-mscgen.el
@@ -1,11 +1,10 @@
 ;;; ob-msc.el --- org-babel functions for mscgen evaluation
 
-;; Copyright (C) 2010  Free Software Foundation, Inc.
+;; Copyright (C) 2010-2013 Free Software Foundation, Inc.
 
 ;; Author: Juan Pechiar
 ;; Keywords: literate programming, reproducible research
 ;; Homepage: http://orgmode.org
-;; Version: 7.4
 
 ;; This file is part of GNU Emacs.
 
@@ -25,7 +24,7 @@
 ;;; Commentary:
 ;;
 ;; This software provides EMACS org-babel export support for message
-;; sequence charts. The mscgen utility is used for processing the
+;; sequence charts.  The mscgen utility is used for processing the
 ;; sequence definition, and must therefore be installed in the system.
 ;;
 ;; Mscgen is available and documented at
@@ -56,7 +55,6 @@
 
 ;;; Code:
 (require 'ob)
-(require 'ob-eval)
 
 (defvar org-babel-default-header-args:mscgen
   '((:results . "file") (:exports . "results"))
@@ -65,15 +63,15 @@
 (defun org-babel-execute:mscgen (body params)
   "Execute a block of Mscgen code with Babel.
 This function is called by `org-babel-execute-src-block'.
-Default filetype is png. Modify by setting :filetype parameter to
+Default filetype is png.  Modify by setting :filetype parameter to
 mscgen supported formats."
   (let* ((out-file (or (cdr (assoc :file params)) "output.png" ))
          (filetype (or (cdr (assoc :filetype params)) "png" )))
     (unless (cdr (assoc :file params))
       (error "
-ERROR: no output file specified. Add \":file name.png\" to the src header"))
+ERROR: no output file specified.  Add \":file name.png\" to the src header"))
     (org-babel-eval (concat "mscgen -T " filetype " -o " out-file) body)
-    out-file))
+    nil)) ;; signal that output has already been written to file
 
 (defun org-babel-prep-session:mscgen (session params)
   "Raise an error because Mscgen doesn't support sessions."
@@ -81,6 +79,6 @@ ERROR: no output file specified. Add \":file name.png\" to the src header"))
 
 (provide 'ob-mscgen)
 
-;; arch-tag: 74695b1e-715f-4b5a-a3a9-d78ee39ba5c8
+
 
 ;;; ob-msc.el ends here