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58f1dbccf8
Also remove blank lines before the ";;; org*el ends here" declarations. Having a "Version" header forced us to update every file when releasing a new version of Org; it also forced us to update every file when merging Org with Emacs trunk, thus cluttering the diffs between the previously merged version and the new one with useless information. Glenn Morris suggested this in emacs-devel: http://lists.gnu.org/archive/html/emacs-devel/2011-08/msg00322.html
90 lines
2.9 KiB
EmacsLisp
90 lines
2.9 KiB
EmacsLisp
;;; ob-dot.el --- org-babel functions for dot evaluation
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;; Copyright (C) 2009-2011 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating dot source code.
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;;
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;; For information on dot see http://www.graphviz.org/
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;;
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;; This differs from most standard languages in that
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;;
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;; 1) there is no such thing as a "session" in dot
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;;
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;; 2) we are generally only going to return results of type "file"
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;;
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;; 3) we are adding the "file" and "cmdline" header arguments
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;;
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;; 4) there are no variables (at least for now)
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;;; Code:
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(require 'ob)
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(require 'ob-eval)
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(defvar org-babel-default-header-args:dot
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'((:results . "file") (:exports . "results"))
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"Default arguments to use when evaluating a dot source block.")
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(defun org-babel-expand-body:dot (body params)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
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(mapc
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(lambda (pair)
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(let ((name (symbol-name (car pair)))
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(value (cdr pair)))
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(setq body
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(replace-regexp-in-string
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(concat "\$" (regexp-quote name))
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(if (stringp value) value (format "%S" value))
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body))))
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vars)
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body))
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(defun org-babel-execute:dot (body params)
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"Execute a block of Dot code with org-babel.
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This function is called by `org-babel-execute-src-block'."
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(let* ((result-params (cdr (assoc :result-params params)))
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(out-file (cdr (assoc :file params)))
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(cmdline (or (cdr (assoc :cmdline params))
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(format "-T%s" (file-name-extension out-file))))
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(cmd (or (cdr (assoc :cmd params)) "dot"))
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(in-file (org-babel-temp-file "dot-")))
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(with-temp-file in-file
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(insert (org-babel-expand-body:dot body params)))
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(org-babel-eval
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(concat cmd
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" " (org-babel-process-file-name in-file)
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" " cmdline
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" -o " (org-babel-process-file-name out-file)) "")
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nil)) ;; signal that output has already been written to file
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(defun org-babel-prep-session:dot (session params)
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"Return an error because Dot does not support sessions."
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(error "Dot does not support sessions"))
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(provide 'ob-dot)
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;;; ob-dot.el ends here
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