contrib/babel/lisp/langs/org-babel-ditaa.el

   1 ;;; org-babel-ditaa.el --- org-babel functions for ditaa evaluation
   2
   3 ;; Copyright (C) 2009 Eric Schulte
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 0.01
   9
  10 ;;; License:
  11
  12 ;; This program is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 3, or (at your option)
  15 ;; any later version.
  16 ;;
  17 ;; This program is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; Org-Babel support for evaluating ditaa source code.
  30 ;;
  31 ;; This differs from most standard languages in that
  32 ;;
  33 ;; 1) there is no such thing as a "session" in ditaa
  34 ;;
  35 ;; 2) we are generally only going to return results of type "file"
  36 ;;
  37 ;; 3) we are adding the "file" and "cmdline" header arguments
  38 ;;
  39 ;; 4) there are no variables (at least for now)
  40
  41 ;;; Code:
  42 (require 'org-babel)
  43
  44 (org-babel-add-interpreter "ditaa")
  45
  46 (add-to-list 'org-babel-tangle-langs '("ditaa" "ditaa"))
  47
  48 (defvar org-babel-default-header-args:ditaa
  49   '((:results . "file") (:exports . "results"))
  50   "Default arguments to use when evaluating a ditaa source block.")
  51
  52 (defun org-babel-execute:ditaa (body params)
  53   "Execute a block of Ditaa code with org-babel.  This function is
  54 called by `org-babel-execute-src-block'."
  55   (message "executing Ditaa source code block")
  56   (let ((result-params (split-string (or (cdr (assoc :results params)) "")))
  57         (out-file (cdr (assoc :file params)))
  58         (cmdline (cdr (assoc :cmdline params)))
  59         (in-file (make-temp-file "org-babel-ditaa")))
  60     (unless (file-exists-p org-ditaa-jar-path)
  61       (error (format "Could not find ditaa.jar at %s" org-ditaa-jar-path)))
  62     (with-temp-file in-file (insert body))
  63     (message (concat "java -jar " org-ditaa-jar-path " " cmdline " " in-file " " out-file))
  64     (shell-command (concat "java -jar " org-ditaa-jar-path " " cmdline " " in-file " " out-file))
  65     out-file))
  66
  67 (defun org-babel-prep-session:ditaa (session params)
  68   (error "Ditaa does not support sessions"))
  69
  70 (provide 'org-babel-ditaa)
  71 ;;; org-babel-ditaa.el ends here