1 ;;; ob-ditaa.el --- org-babel functions for ditaa evaluation
3 ;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
5 ;; Author: Eric Schulte
6 ;; Keywords: literate programming, reproducible research
7 ;; Homepage: http://orgmode.org
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; Org-Babel support for evaluating ditaa source code.
28 ;; This differs from most standard languages in that
30 ;; 1) there is no such thing as a "session" in ditaa
32 ;; 2) we are generally only going to return results of type "file"
34 ;; 3) we are adding the "file" and "cmdline" header arguments
36 ;; 4) there are no variables (at least for now)
40 (require 'org-exp-blocks
)
42 (defvar org-babel-default-header-args
:ditaa
44 (:exports .
"results")
45 (:java .
"-Dfile.encoding=UTF-8"))
46 "Default arguments for evaluating a ditaa source block.")
48 (defcustom org-ditaa-jar-option
"-jar"
49 "Option for the ditaa jar file.
50 Do not leave leading or trailing spaces in this string."
55 (defun org-babel-execute:ditaa
(body params
)
56 "Execute a block of Ditaa code with org-babel.
57 This function is called by `org-babel-execute-src-block'."
58 (let* ((result-params (split-string (or (cdr (assoc :results params
)) "")))
59 (out-file ((lambda (el)
62 "ditaa code block requires :file header argument")))
63 (cdr (assoc :file params
))))
64 (cmdline (cdr (assoc :cmdline params
)))
65 (java (cdr (assoc :java params
)))
66 (in-file (org-babel-temp-file "ditaa-"))
67 (cmd (concat "java " java
" " org-ditaa-jar-option
" "
69 (expand-file-name org-ditaa-jar-path
))
71 " " (org-babel-process-file-name in-file
)
72 " " (org-babel-process-file-name out-file
))))
73 (unless (file-exists-p org-ditaa-jar-path
)
74 (error "Could not find ditaa.jar at %s" org-ditaa-jar-path
))
75 (with-temp-file in-file
(insert body
))
76 (message cmd
) (shell-command cmd
)
77 nil
)) ;; signal that output has already been written to file
79 (defun org-babel-prep-session:ditaa
(session params
)
80 "Return an error because ditaa does not support sessions."
81 (error "Ditaa does not support sessions"))
87 ;;; ob-ditaa.el ends here