It sounds like there is a good deal of desire for this functionality. How much code does this file share with ob-ditaa? If it is a large percentage perhaps it would be possible to instead add a new header argument to ditaa code blocks to run ditaa-eps. Some code blocks (e.g., sql) already have an :engine header argument which may be used to change the back-end tool which executes the block.
Thanks for sharing! "Arne Babenhauserheide (IMK)" <arne.babenhauserhe...@kit.edu> writes: > Dear org hackers, > > I don’t know if there’s already a babel-ditaa-option for using > ditaa-eps, so I modified ob-ditaa.el to use ditaa-eps and convert the > result using epstopdf. > > Feel free to use it. > > ;;; ob-ditaa-eps.el --- org-babel functions for ditaa evaluation > > ;; Copyright (C) 2009-2012 Free Software Foundation, Inc. > > ;; Author: Eric Schulte und Arne Babenhauserheide > ;; 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 ditaa source code as eps/pdf. > ;; > ;; Almost verbatim copy from ob-ditaa, but with ditaa-eps and epstopdf > ;; as intermediate step. > ;; > ;; Ditaa 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) > > (defvar org-babel-default-header-args:ditaa-eps > '((:results . "file") (:exports . "results") (:java . > "-Dfile.encoding=UTF-8")) > "Default arguments for evaluating a ditaa source block.") > > (defcustom org-ditaa-eps-jar-path (expand-file-name > "DitaaEps.jar" > (file-name-as-directory > (expand-file-name > "scripts" > (file-name-as-directory > (expand-file-name > "../contrib" > (file-name-directory (find-library-name > "org"))))))) > "Path to the ditaa-eps jar executable." > :group 'org-babel > :type 'string) > > > (defvar org-ditaa-eps-jar-path) > (defun org-babel-execute:ditaa-eps (body params) > "Execute a block of Ditaa 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 ((lambda (el) > (or el > (error > "ditaa code block requires :file header argument"))) > (cdr (assoc :file params)))) > (cmdline (cdr (assoc :cmdline params))) > (java (cdr (assoc :java params))) > (in-file (org-babel-temp-file "ditaa-")) > (cmd0 (concat "java " java " -jar " > (shell-quote-argument > (expand-file-name org-ditaa-eps-jar-path)) > " " cmdline > " " (org-babel-process-file-name in-file) > " " (org-babel-process-file-name (concat in-file > ".eps")))) > (cmd1 (concat "epstopdf" > " " (org-babel-process-file-name (concat in-file ".eps")) > " -o=" (org-babel-process-file-name out-file)))) > (unless (file-exists-p org-ditaa-eps-jar-path) > (error "Could not find ditaa.jar at %s" org-ditaa-eps-jar-path)) > (with-temp-file in-file (insert body)) > (message cmd0) (shell-command cmd0) > (message cmd1) (shell-command cmd1) > nil)) ;; signal that output has already been written to file > > (defun org-babel-prep-session:ditaa-eps (session params) > "Return an error because ditaa does not support sessions." > (error "Ditaa does not support sessions")) > > (defun ditaa-eps-mode () > (artist-mode)) > > (provide 'ob-ditaa-eps) > > ;;; ob-ditaa-eps.el ends here > > Best wishes, > Arne > -- Eric Schulte http://cs.unm.edu/~eschulte