119 lines
4.2 KiB
EmacsLisp
119 lines
4.2 KiB
EmacsLisp
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;;; ob-js.el --- org-babel functions for Javascript
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;; Copyright (C) 2010 Free Software Foundation
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research, js
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;; Homepage: http://orgmode.org
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;; Version: 0.01
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;;; License:
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;; This program 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, or (at your option)
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;; any later version.
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;;
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;; This program 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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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Now working with SBCL for both session and external evaluation.
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;;
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;; This certainly isn't optimally robust, but it seems to be working
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;; for the basic use cases.
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;;; Requirements:
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;; node.js | http://nodejs.org/
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;;; Code:
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(require 'ob)
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(require 'ob-eval)
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(defvar org-babel-default-header-args:js '()
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"Default header arguments for js code blocks.")
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(defcustom org-babel-js-cmd "node"
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"Name of command used to evaluate js blocks."
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:group 'org-babel
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:type 'string)
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(defvar org-babel-js-function-wrapper
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"require('sys').print(require('sys').inspect(function(){%s}()));"
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"Javascript code to print value of body.")
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(defun org-babel-expand-body:js (body params &optional processed-params)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((vars (nth 1 (or processed-params (org-babel-process-params params)))))
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(concat
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(mapconcat ;; define any variables
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(lambda (pair) (format "var %s=%s;"
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(car pair) (org-babel-js-var-to-js (cdr pair))))
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vars "\n") "\n" body "\n")))
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(defun org-babel-execute:js (body params)
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"Execute a block of Javascript code with org-babel.
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This function is called by `org-babel-execute-src-block'"
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(let* ((processed-params (org-babel-process-params params))
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(session (not (string= (nth 0 processed-params) "none")))
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(result-type (nth 3 processed-params))
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(full-body (org-babel-expand-body:js body params processed-params)))
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(org-babel-js-read
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(if session
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(error "javascript sessions are not yet supported.")
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(let ((script-file (org-babel-temp-file "js-script-")))
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(with-temp-file script-file
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(insert
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;; return the value or the output
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(if (string= result-type "value")
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(format org-babel-js-function-wrapper full-body)
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full-body)))
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(org-babel-eval (format "%s %s" org-babel-js-cmd script-file) ""))))))
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(defun org-babel-js-read (results)
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"Convert RESULTS into an appropriate elisp value.
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If RESULTS look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(org-babel-read
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(if (and (stringp results) (string-match "^\\[.+\\]$" results))
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(org-babel-read
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(concat "'"
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(replace-regexp-in-string
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"\\[" "(" (replace-regexp-in-string
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"\\]" ")" (replace-regexp-in-string
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", " " " (replace-regexp-in-string
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"'" "\"" results))))))
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results)))
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(defun org-babel-js-var-to-js (var)
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"Convert VAR into a js variable.
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Convert an elisp value into a string of js source code
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specifying a variable of the same value."
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(if (listp var)
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(concat "[" (mapconcat #'org-babel-js-var-to-js var ", ") "]")
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(format "%S" var)))
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(defun org-babel-prep-session:js (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(error "not yet implemented"))
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(defun org-babel-js-initiate-session (&optional session)
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"If there is not a current inferior-process-buffer in SESSION
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then create. Return the initialized session."
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(error "Javascript sessions are not yet supported."))
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(provide 'ob-js)
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;; arch-tag: 84401fb3-b8d9-4bb6-9a90-cbe2d103d494
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;;; ob-js.el ends here
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