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;;; ob-ditaa.el --- Babel Functions for ditaa -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2020 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating ditaa source code.
;;
;; This differs from most standard languages in that
;;
;; 1) there is no such thing as a "session" in ditaa
;;
;; 2) we are generally only going to return results of type "file"
;;
;; 3) we are adding the "file" and "cmdline" header arguments
;;
;; 4) there are no variables (at least for now)
;;; Code:
(require 'ob)
(require 'org-compat)
(defvar org-babel-default-header-args:ditaa
'((:results . "file")
(:exports . "results")
(:java . "-Dfile.encoding=UTF-8"))
"Default arguments for evaluating a ditaa source block.")
(defcustom org-ditaa-jar-path (expand-file-name
"ditaa.jar"
(file-name-as-directory
(expand-file-name
"scripts"
(file-name-as-directory
(expand-file-name
"../contrib"
(file-name-directory (org-find-library-dir "org")))))))
"Path to the ditaa jar executable."
:group 'org-babel
:type 'string)
(defcustom org-babel-ditaa-java-cmd "java"
"Java executable to use when evaluating ditaa blocks."
:group 'org-babel
:type 'string)
(defcustom org-ditaa-eps-jar-path
(expand-file-name "DitaaEps.jar" (file-name-directory org-ditaa-jar-path))
"Path to the DitaaEps.jar executable."
:group 'org-babel
:version "24.4"
:package-version '(Org . "8.0")
:type 'string)
(defcustom org-ditaa-jar-option "-jar"
"Option for the ditaa jar file.
Do not leave leading or trailing spaces in this string."
:group 'org-babel
:version "24.1"
:type 'string)
(defun org-babel-execute:ditaa (body params)
"Execute a block of Ditaa code with org-babel.
This function is called by `org-babel-execute-src-block'."
(let* ((out-file (or (cdr (assq :file params))
(error
"ditaa code block requires :file header argument")))
(cmdline (cdr (assq :cmdline params)))
(java (cdr (assq :java params)))
(in-file (org-babel-temp-file "ditaa-"))
(eps (cdr (assq :eps params)))
(eps-file (when eps
(org-babel-process-file-name (concat in-file ".eps"))))
(pdf-cmd (when (and (or (string= (file-name-extension out-file) "pdf")
(cdr (assq :pdf params))))
(concat
"epstopdf"
" " eps-file
" -o=" (org-babel-process-file-name out-file))))
(cmd (concat org-babel-ditaa-java-cmd
" " java " " org-ditaa-jar-option " "
(shell-quote-argument
(expand-file-name
(if eps org-ditaa-eps-jar-path org-ditaa-jar-path)))
" " cmdline
" " (org-babel-process-file-name in-file)
" " (if pdf-cmd
eps-file
(org-babel-process-file-name out-file)))))
(unless (file-exists-p org-ditaa-jar-path)
(error "Could not find ditaa.jar at %s" org-ditaa-jar-path))
(with-temp-file in-file (insert body))
(message cmd) (shell-command cmd)
(when pdf-cmd (message pdf-cmd) (shell-command pdf-cmd))
nil)) ;; signal that output has already been written to file
(defun org-babel-prep-session:ditaa (_session _params)
"Return an error because ditaa does not support sessions."
(error "Ditaa does not support sessions"))
(provide 'ob-ditaa)
;;; ob-ditaa.el ends here
|
