lisp/ob-shen.el

   1 ;;; ob-shen.el --- org-babel functions for Shen
   2
   3 ;; Copyright (C) 2010-2012  Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research, shen
   7 ;; Homepage: http://orgmode.org
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Currently this only works using session evaluation as there is no
  27 ;; defined method for executing shen code outside of a session.
  28
  29 ;;; Requirements:
  30
  31 ;; - shen-mode and inf-shen will soon be available through the GNU
  32 ;;   elpa, however in the interim they are available at
  33 ;;   https://github.com/eschulte/shen-mode
  34
  35 ;;; Code:
  36 (require 'ob)
  37
  38 (declare-function shen-eval-defun "ext:inf-shen" (&optional and-go))
  39
  40 (defvar org-babel-default-header-args:shen '()
  41   "Default header arguments for shen code blocks.")
  42
  43 (defun org-babel-expand-body:shen (body params)
  44   "Expand BODY according to PARAMS, return the expanded body."
  45   (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
  46     (if (> (length vars) 0)
  47         (concat "(let "
  48                 (mapconcat (lambda (var)
  49                              (format "%s %s" (car var)
  50                                      (org-babel-shen-var-to-shen (cdr var))))
  51                            vars " ")
  52                 body ")")
  53       body)))
  54
  55 (defun org-babel-shen-var-to-shen (var)
  56   "Convert VAR into a shen variable."
  57   (if (listp var)
  58       (concat "[" (mapconcat #'org-babel-ruby-var-to-ruby var " ") "]")
  59     (format "%S" var)))
  60
  61 (defun org-babel-execute:shen (body params)
  62   "Execute a block of Shen code with org-babel.
  63 This function is called by `org-babel-execute-src-block'"
  64   (require 'inf-shen)
  65   (let* ((result-type (cdr (assoc :result-type params)))
  66          (result-params (cdr (assoc :result-params params)))
  67          (full-body (org-babel-expand-body:shen body params)))
  68     ((lambda (results)
  69        (if (or (member 'scalar result-params)
  70                (member 'verbatim result-params))
  71            results
  72          (condition-case nil (org-babel-script-escape results)
  73            (error results))))
  74      (with-temp-buffer
  75        (insert full-body)
  76        (call-interactively #'shen-eval-defun)))))
  77
  78 (provide 'ob-shen)
  79 ;;; ob-shen.el ends here