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authorEric Schulte <schulte.eric@gmail.com>2010-08-27 16:59:08 -0600
committerEric Schulte <schulte.eric@gmail.com>2010-08-27 16:59:08 -0600
commit4054eb0b9b834816f7941652864b9e42ea2a191b (patch)
tree485ab96d4088133d4d0f628ae44063efa5bf6f1a
parentde6ff60e2564c84328d38252acb8c9a88f8baaa7 (diff)
downloadorg-mode-4054eb0b9b834816f7941652864b9e42ea2a191b.tar.gz
ob-js: very preliminary support for evaluating Javascript code blocks
This relies upon node.js as the Javascript execution engine. http://nodejs.org/
-rw-r--r--Makefile3
-rw-r--r--lisp/ob-js.el118
-rw-r--r--lisp/org.el1
3 files changed, 121 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index c22f165..ec22eef 100644
--- a/Makefile
+++ b/Makefile
@@ -149,7 +149,8 @@ LISPF = org.el \
ob-octave.el \
ob-screen.el \
ob-plantuml.el \
- ob-org.el
+ ob-org.el \
+ ob-js.el
LISPFILES0 = $(LISPF:%=lisp/%)
LISPFILES = $(LISPFILES0) lisp/org-install.el
diff --git a/lisp/ob-js.el b/lisp/ob-js.el
new file mode 100644
index 0000000..9c48552
--- /dev/null
+++ b/lisp/ob-js.el
@@ -0,0 +1,118 @@
+;;; ob-js.el --- org-babel functions for Javascript
+
+;; Copyright (C) 2010 Free Software Foundation
+
+;; Author: Eric Schulte
+;; Keywords: literate programming, reproducible research, js
+;; Homepage: http://orgmode.org
+;; Version: 0.01
+
+;;; License:
+
+;; This program 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, or (at your option)
+;; any later version.
+;;
+;; This program 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; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; Now working with SBCL for both session and external evaluation.
+;;
+;; This certainly isn't optimally robust, but it seems to be working
+;; for the basic use cases.
+
+;;; Requirements:
+
+;; node.js | http://nodejs.org/
+
+;;; Code:
+(require 'ob)
+(require 'ob-eval)
+
+(defvar org-babel-default-header-args:js '()
+ "Default header arguments for js code blocks.")
+
+(defcustom org-babel-js-cmd "node"
+ "Name of command used to evaluate js blocks."
+ :group 'org-babel
+ :type 'string)
+
+(defvar org-babel-js-function-wrapper
+ "require('sys').print(require('sys').inspect(function(){%s}()));"
+ "Javascript code to print value of body.")
+
+(defun org-babel-expand-body:js (body params &optional processed-params)
+ "Expand BODY according to PARAMS, return the expanded body."
+ (let ((vars (nth 1 (or processed-params (org-babel-process-params params)))))
+ (concat
+ (mapconcat ;; define any variables
+ (lambda (pair) (format "var %s=%s;"
+ (car pair) (org-babel-js-var-to-js (cdr pair))))
+ vars "\n") "\n" body "\n")))
+
+(defun org-babel-execute:js (body params)
+ "Execute a block of Javascript code with org-babel.
+This function is called by `org-babel-execute-src-block'"
+ (let* ((processed-params (org-babel-process-params params))
+ (session (not (string= (nth 0 processed-params) "none")))
+ (result-type (nth 3 processed-params))
+ (full-body (org-babel-expand-body:js body params processed-params)))
+ (org-babel-js-read
+ (if session
+ (error "javascript sessions are not yet supported.")
+ (let ((script-file (org-babel-temp-file "js-script-")))
+ (with-temp-file script-file
+ (insert
+ ;; return the value or the output
+ (if (string= result-type "value")
+ (format org-babel-js-function-wrapper full-body)
+ full-body)))
+ (org-babel-eval (format "%s %s" org-babel-js-cmd script-file) ""))))))
+
+(defun org-babel-js-read (results)
+ "Convert RESULTS into an appropriate elisp value.
+If RESULTS look like a table, then convert them into an
+Emacs-lisp table, otherwise return the results as a string."
+ (org-babel-read
+ (if (and (stringp results) (string-match "^\\[.+\\]$" results))
+ (org-babel-read
+ (concat "'"
+ (replace-regexp-in-string
+ "\\[" "(" (replace-regexp-in-string
+ "\\]" ")" (replace-regexp-in-string
+ ", " " " (replace-regexp-in-string
+ "'" "\"" results))))))
+ results)))
+
+(defun org-babel-js-var-to-js (var)
+ "Convert VAR into a js variable.
+Convert an elisp value into a string of js source code
+specifying a variable of the same value."
+ (if (listp var)
+ (concat "[" (mapconcat #'org-babel-js-var-to-js var ", ") "]")
+ (format "%S" var)))
+
+(defun org-babel-prep-session:js (session params)
+ "Prepare SESSION according to the header arguments specified in PARAMS."
+ (error "not yet implemented"))
+
+(defun org-babel-js-initiate-session (&optional session)
+ "If there is not a current inferior-process-buffer in SESSION
+then create. Return the initialized session."
+ (error "Javascript sessions are not yet supported."))
+
+(provide 'ob-js)
+
+;; arch-tag: 84401fb3-b8d9-4bb6-9a90-cbe2d103d494
+
+;;; ob-js.el ends here
diff --git a/lisp/org.el b/lisp/org.el
index bc62633..39c7886 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -154,6 +154,7 @@ requirements) is loaded."
(const :tag "Emacs Lisp" emacs-lisp)
(const :tag "Gnuplot" gnuplot)
(const :tag "Haskell" haskell)
+ (const :tag "Javascript" js)
(const :tag "Latex" latex)
(const :tag "Ledger" ledger)
(const :tag "Matlab" matlab)