;;; ob-dot.el --- Babel Functions for dot -*- lexical-binding: t; -*-
|
|
;; Copyright (C) 2009-2018 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 dot source code.
|
;;
|
;; For information on dot see http://www.graphviz.org/
|
;;
|
;; This differs from most standard languages in that
|
;;
|
;; 1) there is no such thing as a "session" in dot
|
;;
|
;; 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:dot
|
'((:results . "file") (:exports . "results"))
|
"Default arguments to use when evaluating a dot source block.")
|
|
(defun org-babel-expand-body:dot (body params)
|
"Expand BODY according to PARAMS, return the expanded body."
|
(let ((vars (org-babel--get-vars params)))
|
(mapc
|
(lambda (pair)
|
(let ((name (symbol-name (car pair)))
|
(value (cdr pair)))
|
(setq body
|
(replace-regexp-in-string
|
(concat "$" (regexp-quote name))
|
(if (stringp value) value (format "%S" value))
|
body
|
t
|
t))))
|
vars)
|
body))
|
|
(defun org-babel-execute:dot (body params)
|
"Execute a block of Dot code with org-babel.
|
This function is called by `org-babel-execute-src-block'."
|
(let* ((out-file (cdr (or (assq :file params)
|
(error "You need to specify a :file parameter"))))
|
(cmdline (or (cdr (assq :cmdline params))
|
(format "-T%s" (file-name-extension out-file))))
|
(cmd (or (cdr (assq :cmd params)) "dot"))
|
(in-file (org-babel-temp-file "dot-")))
|
(with-temp-file in-file
|
(insert (org-babel-expand-body:dot body params)))
|
(org-babel-eval
|
(concat cmd
|
" " (org-babel-process-file-name in-file)
|
" " cmdline
|
" -o " (org-babel-process-file-name out-file)) "")
|
nil)) ;; signal that output has already been written to file
|
|
(defun org-babel-prep-session:dot (_session _params)
|
"Return an error because Dot does not support sessions."
|
(error "Dot does not support sessions"))
|
|
(provide 'ob-dot)
|
|
|
|
;;; ob-dot.el ends here
|
