;;; ob-shen.el --- Babel Functions for Shen -*- lexical-binding: t; -*-
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;; Copyright (C) 2010-2018 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research, shen
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;; Homepage: https://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Currently this only works using session evaluation as there is no
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;; defined method for executing shen code outside of a session.
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;;; Requirements:
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;; - shen-mode and inf-shen will soon be available through the GNU
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;; elpa, however in the interim they are available at
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;; https://github.com/eschulte/shen-mode
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;;; Code:
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(require 'ob)
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(declare-function shen-eval-defun "ext:inf-shen" (&optional and-go))
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(declare-function org-babel-ruby-var-to-ruby "ob-ruby" (var))
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(defvar org-babel-default-header-args:shen '()
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"Default header arguments for shen code blocks.")
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(defun org-babel-expand-body:shen (body params)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((vars (org-babel--get-vars params)))
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(if (> (length vars) 0)
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(concat "(let "
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(mapconcat (lambda (var)
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(format "%s %s" (car var)
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(org-babel-shen-var-to-shen (cdr var))))
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vars " ")
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body ")")
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body)))
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(defun org-babel-shen-var-to-shen (var)
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"Convert VAR into a shen variable."
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(if (listp var)
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(concat "[" (mapconcat #'org-babel-ruby-var-to-ruby var " ") "]")
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(format "%S" var)))
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(defun org-babel-execute:shen (body params)
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"Execute a block of Shen code with org-babel.
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This function is called by `org-babel-execute-src-block'"
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(require 'inf-shen)
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(let* ((result-params (cdr (assq :result-params params)))
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(full-body (org-babel-expand-body:shen body params)))
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(let ((results
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(with-temp-buffer
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(insert full-body)
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(call-interactively #'shen-eval-defun))))
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(org-babel-result-cond result-params
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results
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(condition-case nil (org-babel-script-escape results)
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(error results))))))
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(provide 'ob-shen)
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;;; ob-shen.el ends here
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