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| | ;;; ob-eukleides.el --- Org-babel functions for eukleides evaluation
;; Copyright (C) 2010-2013 Free Software Foundation, Inc.
;; Author: Luis Anaya
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; This file is not part of GNU Emacs.
;; This program 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.
;; This program 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 eukleides script.
;;
;; Inspired by Ian Yang's org-export-blocks-format-eukleides
;; http://www.emacswiki.org/emacs/org-export-blocks-format-eukleides.el
;;; Requirements:
;; eukleides | http://eukleides.org
;; eukleides | `org-eukleides-path' should point to the eukleides executablexs
;;; Code:
(require 'ob)
(require 'ob-eval)
(defvar org-babel-default-header-args:eukleides
'((:results . "file") (:exports . "results"))
"Default arguments for evaluating a eukleides source block.")
(defcustom org-eukleides-path nil
"Path to the eukleides executable file."
:group 'org-babel
:type 'string)
(defcustom org-eukleides-eps-to-raster nil
"Command used to convert EPS to raster. Nil for no conversion."
:group 'org-babel
:type '(choice
(repeat :tag "Shell Command Sequence" (string :tag "Shell Command"))
(const :tag "sam2p" "a=%s;b=%s;sam2p ${a} ${b}" )
(const :tag "NetPNM" "a=%s;b=%s;pstopnm -stdout ${a} | pnmtopng > ${b}" )
(const :tag "None" nil)))
(defun org-babel-execute:eukleides (body params)
"Execute a block of eukleides 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 "Eukleides requires a \":file\" header argument")))
(cmdline (cdr (assoc :cmdline params)))
(in-file (org-babel-temp-file "eukleides-"))
(java (or (cdr (assoc :java params)) ""))
(cmd (if (not org-eukleides-path)
(error "`org-eukleides-path' is not set")
(concat (expand-file-name org-eukleides-path)
" -b --output="
(org-babel-process-file-name
(concat
(file-name-sans-extension out-file) ".eps"))
" "
(org-babel-process-file-name in-file)))))
(unless (file-exists-p org-eukleides-path)
(error "Could not find eukleides at %s" org-eukleides-path))
(if (string= (file-name-extension out-file) "png")
(if org-eukleides-eps-to-raster
(shell-command (format org-eukleides-eps-to-raster
(concat (file-name-sans-extension out-file) ".eps")
(concat (file-name-sans-extension out-file) ".png")))
(error "Conversion to PNG not supported. use a file with an EPS name")))
(with-temp-file in-file (insert body))
(message "%s" cmd) (org-babel-eval cmd "")
nil)) ;; signal that output has already been written to file
(defun org-babel-prep-session:eukleides (session params)
"Return an error because eukleides does not support sessions."
(error "Eukleides does not support sessions"))
(provide 'ob-eukleides)
;;; ob-eukleides.el ends here
|