First release into babel/contrib.

* src/org-mode/contrib/babel/langs/ob-eukleides.el: First release
into babel/contrib.

contrib/babel/langs/ob-eukleides.el

@@ -0,0 +1,101 @@
+;;; ob-eukleides.el --- org-babel functions for eukleides evaluation
+
+;; Copyright (C) 2010-2012  Free Software Foundation, Inc.
+
+;; Author: Luis Anaya
+;; Keywords: literate programming, reproducible research
+;; Homepage: http://orgmode.org
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs 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.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Org-Babel support for evaluating eukleides script.
+;;
+;; Inspired by Ian Yang's org-export-blocks-format-eukleides
+;; http://www.emacswiki.org/emacs/org-export-blocks-format-eukleides.el
+
+;;; Requirements:
+
+;; eukleides     | http://eukleides.org
+;; eukleides     | `org-eukleides-path' should point to the eukleides executablexs
+
+;;; Code:
+(require 'ob)
+(require 'ob-eval)
+
+(defvar org-babel-default-header-args:eukleides
+  '((:results . "file") (:exports . "results"))
+  "Default arguments for evaluating a eukleides source block.")
+
+(defcustom org-eukleides-path nil
+  "Path to the eukleides executable file."
+  :group 'org-babel
+  :version "24.1"
+  :type 'string)
+
+
+(defcustom org-eukleides-eps-to-raster nil
+  "Command used to convert EPS to raster. Nil for no conversion."
+  :group 'org-babel
+  :type '(choice
+         (repeat :tag "Shell Command Sequence" (string :tag "Shell Command"))
+         (const :tag "sam2p" "a=%s;b=%s;sam2p ${a} ${b}" )
+         (const :tag "NetPNM"  "a=%s;b=%s;pstopnm -stdout ${a} | pnmtopng  > ${b}" )
+         (const :tag "None" nil)))
+
+
+(defun org-babel-execute:eukleides (body params)
+  "Execute a block of eukleides code with org-babel.
+This function is called by `org-babel-execute-src-block'."
+  (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
+	 (out-file (or (cdr (assoc :file params))
+		       (error "Eukleides requires a \":file\" header argument")))
+	 (cmdline (cdr (assoc :cmdline params)))
+	 (in-file (org-babel-temp-file "eukleides-"))
+	 (java (or (cdr (assoc :java params)) ""))
+	 (cmd (if (not org-eukleides-path)
+		  (error "`org-eukleides-path' is not set")
+		(concat (expand-file-name org-eukleides-path)
+                " -b --output="
+                (org-babel-process-file-name 
+                 (concat 
+                  (file-name-sans-extension out-file) ".eps"))
+                " "
+                (org-babel-process-file-name in-file)))))
+    (unless (file-exists-p org-eukleides-path)
+      (error "Could not find eukleides at %s" org-eukleides-path))
+    
+    (if (string= (file-name-extension out-file) "png")
+        (if org-eukleides-eps-to-raster
+            (shell-command (format org-eukleides-eps-to-raster  
+                                    (concat (file-name-sans-extension out-file) ".eps")
+                                    (concat (file-name-sans-extension out-file) ".png")))
+          (error "Conversion to PNG not supported. use a file with an EPS name")))
+
+    (with-temp-file in-file (insert body))
+    (message "%s" cmd) (org-babel-eval cmd "")
+    nil)) ;; signal that output has already been written to file
+
+(defun org-babel-prep-session:eukleides (session params)
+  "Return an error because eukleides does not support sessions."
+  (error "Eukleides does not support sessions"))
+
+(provide 'ob-eukleides)
+
+
+
+;;; ob-eukleides.el ends here