lisp/ob-io.el

   1 ;;; ob-io.el --- org-babel functions for Io evaluation
   2
   3 ;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Andrzej Lichnerowicz
   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 ;; Currently only supports the external execution.  No session support yet.
  26 ;; :results output -- runs in scripting mode
  27 ;; :results output repl -- runs in repl mode
  28
  29 ;;; Requirements:
  30 ;; - Io language :: http://iolanguage.org/
  31 ;; - Io major mode :: Can be installed from Io sources
  32 ;;  https://github.com/stevedekorte/io/blob/master/extras/SyntaxHighlighters/Emacs/io-mode.el
  33
  34 ;;; Code:
  35 (require 'ob)
  36 (eval-when-compile (require 'cl))
  37
  38 (defvar org-babel-tangle-lang-exts) ;; Autoloaded
  39 (add-to-list 'org-babel-tangle-lang-exts '("io" . "io"))
  40 (defvar org-babel-default-header-args:io '())
  41 (defvar org-babel-io-command "io"
  42   "Name of the command to use for executing Io code.")
  43
  44 (defun org-babel-execute:io (body params)
  45   "Execute a block of Io code with org-babel.  This function is
  46 called by `org-babel-execute-src-block'"
  47   (message "executing Io source code block")
  48   (let* ((processed-params (org-babel-process-params params))
  49          (session (org-babel-io-initiate-session (nth 0 processed-params)))
  50          (vars (nth 1 processed-params))
  51          (result-params (nth 2 processed-params))
  52          (result-type (cdr (assoc :result-type params)))
  53          (full-body (org-babel-expand-body:generic
  54                      body params))
  55          (result (org-babel-io-evaluate
  56                   session full-body result-type result-params)))
  57
  58     (org-babel-reassemble-table
  59      result
  60      (org-babel-pick-name
  61       (cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
  62      (org-babel-pick-name
  63       (cdr (assoc :rowname-names params)) (cdr (assoc :rownames params))))))
  64
  65
  66 (defun org-babel-io-table-or-string (results)
  67   "Convert RESULTS into an appropriate elisp value.
  68 If RESULTS look like a table, then convert them into an
  69 Emacs-lisp table, otherwise return the results as a string."
  70   (org-babel-script-escape results))
  71
  72
  73 (defvar org-babel-io-wrapper-method
  74   "(
  75 %s
  76 ) asString print
  77 ")
  78
  79
  80 (defun org-babel-io-evaluate (session body &optional result-type result-params)
  81   "Evaluate BODY in external Io process.
  82 If RESULT-TYPE equals 'output then return standard output as a string.
  83 If RESULT-TYPE equals 'value then return the value of the last statement
  84 in BODY as elisp."
  85   (when session (error "Sessions are not (yet) supported for Io"))
  86   (case result-type
  87     (output
  88      (if (member "repl" result-params)
  89          (org-babel-eval org-babel-io-command body)
  90        (let ((src-file (org-babel-temp-file "io-")))
  91          (progn (with-temp-file src-file (insert body))
  92                 (org-babel-eval
  93                  (concat org-babel-io-command " " src-file) "")))))
  94     (value (let* ((src-file (org-babel-temp-file "io-"))
  95                   (wrapper (format org-babel-io-wrapper-method body)))
  96              (with-temp-file src-file (insert wrapper))
  97              ((lambda (raw)
  98                 (org-babel-result-cond result-params
  99                   raw
 100                   (org-babel-io-table-or-string raw)))
 101               (org-babel-eval
 102                (concat org-babel-io-command " " src-file) ""))))))
 103
 104
 105 (defun org-babel-prep-session:io (session params)
 106   "Prepare SESSION according to the header arguments specified in PARAMS."
 107   (error "Sessions are not (yet) supported for Io"))
 108
 109 (defun org-babel-io-initiate-session (&optional session)
 110   "If there is not a current inferior-process-buffer in SESSION
 111 then create.  Return the initialized session.  Sessions are not
 112 supported in Io."
 113   nil)
 114
 115 (provide 'ob-io)
 116
 117
 118
 119 ;;; ob-io.el ends here