lisp/org/ob-emacs-lisp.el

   1 ;;; ob-emacs-lisp.el --- org-babel functions for emacs-lisp code evaluation
   2
   3 ;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research
   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 ;; Org-Babel support for evaluating emacs-lisp code
  27
  28 ;;; Code:
  29 (require 'ob)
  30
  31 (defvar org-babel-default-header-args:emacs-lisp
  32   '((:hlines . "yes") (:colnames . "no"))
  33   "Default arguments for evaluating an emacs-lisp source block.")
  34
  35 (declare-function orgtbl-to-generic "org-table" (table params))
  36
  37 (defun org-babel-expand-body:emacs-lisp (body params)
  38   "Expand BODY according to PARAMS, return the expanded body."
  39   (let* ((vars (mapcar #'cdr (org-babel-get-header params :var)))
  40          (result-params (cdr (assoc :result-params params)))
  41          (print-level nil) (print-length nil)
  42          (body (if (> (length vars) 0)
  43                    (concat "(let ("
  44                            (mapconcat
  45                             (lambda (var)
  46                               (format "%S" (print `(,(car var) ',(cdr var)))))
  47                             vars "\n      ")
  48                            ")\n" body "\n)")
  49                  (concat body "\n"))))
  50     (if (or (member "code" result-params)
  51             (member "pp" result-params))
  52         (concat "(pp " body ")") body)))
  53
  54 (defun org-babel-execute:emacs-lisp (body params)
  55   "Execute a block of emacs-lisp code with Babel."
  56   (save-window-excursion
  57     (let ((result
  58            (eval (read (format (if (member "output"
  59                                            (cdr (assoc :result-params params)))
  60                                    "(with-output-to-string %s)"
  61                                  "(progn %s)")
  62                                (org-babel-expand-body:emacs-lisp
  63                                 body params))))))
  64       (org-babel-result-cond (cdr (assoc :result-params params))
  65         (let ((print-level nil)
  66               (print-length nil))
  67           (if (or (member "scalar" (cdr (assoc :result-params params)))
  68                   (member "verbatim" (cdr (assoc :result-params params))))
  69               (format "%S" result)
  70             (format "%s" result)))
  71         (org-babel-reassemble-table
  72          result
  73          (org-babel-pick-name (cdr (assoc :colname-names params))
  74                               (cdr (assoc :colnames params)))
  75          (org-babel-pick-name (cdr (assoc :rowname-names params))
  76                               (cdr (assoc :rownames params))))))))
  77
  78 (provide 'ob-emacs-lisp)
  79
  80
  81
  82 ;;; ob-emacs-lisp.el ends here