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;;; ob-shen.el --- org-babel functions for Shen
;; Copyright (C) 2010-2012 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research, shen
;; Homepage: http://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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Currently this only works using session evaluation as there is no
;; defined method for executing shen code outside of a session.
;;; Requirements:
;; - shen-mode and inf-shen will soon be available through the GNU
;; elpa, however in the interim they are available at
;; https://github.com/eschulte/shen-mode
;;; Code:
(require 'ob)
(declare-function shen-eval-defun "ext:inf-shen" (&optional and-go))
(defvar org-babel-default-header-args:shen '()
"Default header arguments for shen code blocks.")
(defun org-babel-expand-body:shen (body params)
"Expand BODY according to PARAMS, return the expanded body."
(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
(if (> (length vars) 0)
(concat "(let "
(mapconcat (lambda (var)
(format "%s %s" (car var)
(org-babel-shen-var-to-shen (cdr var))))
vars " ")
body ")")
body)))
(defun org-babel-shen-var-to-shen (var)
"Convert VAR into a shen variable."
(if (listp var)
(concat "[" (mapconcat #'org-babel-ruby-var-to-ruby var " ") "]")
(format "%S" var)))
(defun org-babel-execute:shen (body params)
"Execute a block of Shen code with org-babel.
This function is called by `org-babel-execute-src-block'"
(require 'inf-shen)
(let* ((result-type (cdr (assoc :result-type params)))
(result-params (cdr (assoc :result-params params)))
(full-body (org-babel-expand-body:shen body params)))
((lambda (results)
(if (or (member 'scalar result-params)
(member 'verbatim result-params))
results
(condition-case nil (org-babel-script-escape results)
(error results))))
(with-temp-buffer
(insert full-body)
(call-interactively #'shen-eval-defun)))))
(provide 'ob-shen)
;;; ob-shen.el ends here
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