lisp/ob-plantuml.el

   1 ;;; ob-plantuml.el --- org-babel functions for plantuml evaluation
   2
   3 ;; Copyright (C) 2010-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Zhang Weize
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8
   9 ;; This file is part of GNU Emacs.
  10
  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.
  15
  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.
  20
  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/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Org-Babel support for evaluating plantuml script.
  27 ;;
  28 ;; Inspired by Ian Yang's org-export-blocks-format-plantuml
  29 ;; http://www.emacswiki.org/emacs/org-export-blocks-format-plantuml.el
  30
  31 ;;; Requirements:
  32
  33 ;; plantuml     | http://plantuml.sourceforge.net/
  34 ;; plantuml.jar | `org-plantuml-jar-path' should point to the jar file
  35
  36 ;;; Code:
  37 (require 'ob)
  38 (require 'ob-eval)
  39
  40 (defvar org-babel-default-header-args:plantuml
  41   '((:results . "file") (:exports . "results"))
  42   "Default arguments for evaluating a plantuml source block.")
  43
  44 (defcustom org-plantuml-jar-path nil
  45   "Path to the plantuml.jar file."
  46   :group 'org-babel
  47   :type 'string)
  48
  49 (defun org-babel-execute:plantuml (body params)
  50   "Execute a block of plantuml code with org-babel.
  51 This function is called by `org-babel-execute-src-block'."
  52   (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
  53          (out-file (or (cdr (assoc :file params))
  54                        (error "plantuml requires a \":file\" header argument")))
  55          (cmdline (cdr (assoc :cmdline params)))
  56          (in-file (org-babel-temp-file "plantuml-"))
  57          (cmd (if (not org-plantuml-jar-path)
  58                   (error "`org-plantuml-jar-path' is not set")
  59                 (concat "java -jar "
  60                         (shell-quote-argument
  61                          (expand-file-name org-plantuml-jar-path))
  62                         (if (string= (file-name-extension out-file) "svg")
  63                             " -tsvg" "")
  64                         (if (string= (file-name-extension out-file) "eps")
  65                             " -teps" "")
  66                         " -p " cmdline " < "
  67                         (org-babel-process-file-name in-file)
  68                         " > "
  69                         (org-babel-process-file-name out-file)))))
  70     (unless (file-exists-p org-plantuml-jar-path)
  71       (error "Could not find plantuml.jar at %s" org-plantuml-jar-path))
  72     (with-temp-file in-file (insert (concat "@startuml\n" body "\n@enduml")))
  73     (message "%s" cmd) (org-babel-eval cmd "")
  74     nil)) ;; signal that output has already been written to file
  75
  76 (defun org-babel-prep-session:plantuml (session params)
  77   "Return an error because plantuml does not support sessions."
  78   (error "Plantuml does not support sessions"))
  79
  80 (provide 'ob-plantuml)
  81
  82
  83
  84 ;;; ob-plantuml.el ends here