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;;; ob-plantuml.el --- org-babel functions for plantuml evaluation
;; Copyright (C) 2010-2016 Free Software Foundation, Inc.
;; Author: Zhang Weize
;; 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 plantuml script.
;;
;; Inspired by Ian Yang's org-export-blocks-format-plantuml
;; http://www.emacswiki.org/emacs/org-export-blocks-format-plantuml.el
;;; Requirements:
;; plantuml | http://plantuml.sourceforge.net/
;; plantuml.jar | `org-plantuml-jar-path' should point to the jar file
;;; Code:
(require 'ob)
(defvar org-babel-default-header-args:plantuml
'((:results . "file") (:exports . "results"))
"Default arguments for evaluating a plantuml source block.")
(defcustom org-plantuml-jar-path ""
"Path to the plantuml.jar file."
:group 'org-babel
:version "24.1"
:type 'string)
(defun org-babel-execute:plantuml (body params)
"Execute a block of plantuml 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 "PlantUML requires a \":file\" header argument")))
(cmdline (cdr (assoc :cmdline params)))
(in-file (org-babel-temp-file "plantuml-"))
(java (or (cdr (assoc :java params)) ""))
(cmd (if (string= "" org-plantuml-jar-path)
(error "`org-plantuml-jar-path' is not set")
(concat "java " java " -jar "
(shell-quote-argument
(expand-file-name org-plantuml-jar-path))
(if (string= (file-name-extension out-file) "svg")
" -tsvg" "")
(if (string= (file-name-extension out-file) "eps")
" -teps" "")
" -p " cmdline " < "
(org-babel-process-file-name in-file)
" > "
(org-babel-process-file-name out-file)))))
(unless (file-exists-p org-plantuml-jar-path)
(error "Could not find plantuml.jar at %s" org-plantuml-jar-path))
(with-temp-file in-file (insert (concat "@startuml\n" body "\n@enduml")))
(message "%s" cmd) (org-babel-eval cmd "")
nil)) ;; signal that output has already been written to file
(defun org-babel-prep-session:plantuml (session params)
"Return an error because plantuml does not support sessions."
(error "Plantuml does not support sessions"))
(provide 'ob-plantuml)
;;; ob-plantuml.el ends here
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