lisp/org/ob-sass.el

   1 ;;; ob-sass.el --- org-babel functions for the sass css generation language
   2
   3 ;; Copyright (C) 2009-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 7.7
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; For more information on sass see http://sass-lang.com/
  28 ;;
  29 ;; This accepts a 'file' header argument which is the target of the
  30 ;; compiled sass.  The default output type for sass evaluation is
  31 ;; either file (if a 'file' header argument was given) or scalar if no
  32 ;; such header argument was supplied.
  33 ;;
  34 ;; A 'cmdline' header argument can be supplied to pass arguments to
  35 ;; the sass command line.
  36
  37 ;;; Requirements:
  38
  39 ;; - sass-mode :: http://github.com/nex3/haml/blob/master/extra/sass-mode.el
  40
  41 ;;; Code:
  42 (require 'ob)
  43 (require 'ob-eval)
  44
  45 (defvar org-babel-default-header-args:sass '())
  46
  47 (defun org-babel-execute:sass (body params)
  48   "Execute a block of Sass code with Babel.
  49 This function is called by `org-babel-execute-src-block'."
  50   (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
  51          (file (cdr (assoc :file params)))
  52          (out-file (or file (org-babel-temp-file "sass-out-")))
  53          (cmdline (cdr (assoc :cmdline params)))
  54          (in-file (org-babel-temp-file "sass-in-"))
  55          (cmd (concat "sass " (or cmdline "")
  56                       " " (org-babel-process-file-name in-file)
  57                       " " (org-babel-process-file-name out-file))))
  58     (with-temp-file in-file
  59       (insert (org-babel-expand-body:generic body params)))
  60     (org-babel-eval cmd "")
  61     (if file
  62         nil ;; signal that output has already been written to file
  63       (with-temp-buffer (insert-file-contents out-file) (buffer-string)))))
  64
  65 (defun org-babel-prep-session:sass (session params)
  66   "Raise an error because sass does not support sessions."
  67   (error "Sass does not support sessions"))
  68
  69 (provide 'ob-sass)
  70
  71
  72
  73 ;;; ob-sass.el ends here