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authormattkae <mattkae@protonmail.com>2022-05-11 09:23:58 -0400
committermattkae <mattkae@protonmail.com>2022-05-11 09:23:58 -0400
commit3f4a0d5370ae6c34afe180df96add3b8522f4af1 (patch)
treeae901409e02bde8ee278475f8cf6818f8f680a60 /elpa/org-9.5.2/ob-dot.el
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+;;; ob-dot.el --- Babel Functions for dot -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+;; Author: Eric Schulte
+;; Maintainer: Justin Abrahms
+;; 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 https://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"))
+ (coding-system-for-read 'utf-8) ;use utf-8 with sub-processes
+ (coding-system-for-write 'utf-8)
+ (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