Update copyright year to 2015

[gnu-emacs] / lisp / org / ob-dot.el

diff --git a/lisp/org/ob-dot.el b/lisp/org/ob-dot.el
index 09476cd25924dbb2a41ba80722345dd9ece9051e..21a40b34f4999cf0bf7f6f7681263cd78d59f0b2 100644 (file)
--- a/lisp/org/ob-dot.el
+++ b/lisp/org/ob-dot.el
@@ -1,11 +1,10 @@
 ;;; ob-dot.el --- org-babel functions for dot evaluation
 
-;; Copyright (C) 2009-2011  Free Software Foundation, Inc.
+;; Copyright (C) 2009-2015 Free Software Foundation, Inc.
 
 ;; Author: Eric Schulte
 ;; Keywords: literate programming, reproducible research
 ;; Homepage: http://orgmode.org
-;; Version: 7.4
 
 ;; This file is part of GNU Emacs.
 
@@ -40,7 +39,6 @@
 
 ;;; Code:
 (require 'ob)
-(require 'ob-eval)
 
 (defvar org-babel-default-header-args:dot
   '((:results . "file") (:exports . "results"))
@@ -65,7 +63,8 @@
   "Execute a block of Dot 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)))
+        (out-file (cdr (or (assoc :file params)
+                           (error "You need to specify a :file parameter"))))
         (cmdline (or (cdr (assoc :cmdline params))
                      (format "-T%s" (file-name-extension out-file))))
         (cmd (or (cdr (assoc :cmd params)) "dot"))
@@ -77,7 +76,7 @@ This function is called by `org-babel-execute-src-block'."
             " " (org-babel-process-file-name in-file)
             " " cmdline
             " -o " (org-babel-process-file-name out-file)) "")
-    out-file))
+    nil)) ;; signal that output has already been written to file
 
 (defun org-babel-prep-session:dot (session params)
   "Return an error because Dot does not support sessions."
@@ -86,4 +85,5 @@ This function is called by `org-babel-execute-src-block'."
 (provide 'ob-dot)
 
 
+
 ;;; ob-dot.el ends here