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Also remove blank lines before the ";;; org*el ends here" declarations. Having a "Version" header forced us to update every file when releasing a new version of Org; it also forced us to update every file when merging Org with Emacs trunk, thus cluttering the diffs between the previously merged version and the new one with useless information. Glenn Morris suggested this in emacs-devel: http://lists.gnu.org/archive/html/emacs-devel/2011-08/msg00322.html
165 lines
5.8 KiB
EmacsLisp
165 lines
5.8 KiB
EmacsLisp
;;; ob-js.el --- org-babel functions for Javascript
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;; Copyright (C) 2010-2011 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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;;; 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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;; - a non-browser javascript engine such as node.js http://nodejs.org/
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;; or mozrepl http://wiki.github.com/bard/mozrepl/
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;;
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;; - for session based evaluation mozrepl and moz.el are required see
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;; http://wiki.github.com/bard/mozrepl/emacs-integration for
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;; configuration instructions
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;;; Code:
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(require 'ob)
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(require 'ob-ref)
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(require 'ob-comint)
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(require 'ob-eval)
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(eval-when-compile (require 'cl))
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(declare-function run-mozilla "ext:moz" (arg))
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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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(defvar org-babel-js-eoe "org-babel-js-eoe"
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"String to indicate that evaluation has completed.")
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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-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* ((org-babel-js-cmd (or (cdr (assoc :cmd params)) org-babel-js-cmd))
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(result-type (cdr (assoc :result-type params)))
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(full-body (org-babel-expand-body:generic
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body params (org-babel-variable-assignments:js params))))
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(org-babel-js-read
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(if (not (string= (cdr (assoc :session params)) "none"))
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;; session evaluation
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(let ((session (org-babel-prep-session:js
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(cdr (assoc :session params)) params)))
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(nth 1
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(org-babel-comint-with-output
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(session (format "%S" org-babel-js-eoe) t body)
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(mapc
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(lambda (line)
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(insert (org-babel-chomp line)) (comint-send-input nil t))
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(list body (format "%S" org-babel-js-eoe))))))
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;; external evaluation
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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
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(format "%s %s" org-babel-js-cmd
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(org-babel-process-file-name 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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(let* ((session (org-babel-js-initiate-session session))
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(var-lines (org-babel-variable-assignments:js params)))
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(when session
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(org-babel-comint-in-buffer session
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(sit-for .5) (goto-char (point-max))
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(mapc (lambda (var)
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(insert var) (comint-send-input nil t)
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(org-babel-comint-wait-for-output session)
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(sit-for .1) (goto-char (point-max))) var-lines)))
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session))
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(defun org-babel-variable-assignments:js (params)
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"Return list of Javascript statements assigning the block's variables"
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(mapcar
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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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(mapcar #'cdr (org-babel-get-header params :var))))
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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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(unless (string= session "none")
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(cond
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((string= "mozrepl" org-babel-js-cmd)
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(require 'moz)
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(let ((session-buffer (save-window-excursion
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(run-mozilla nil)
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(rename-buffer session)
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(current-buffer))))
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(if (org-babel-comint-buffer-livep session-buffer)
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(progn (sit-for .25) session-buffer)
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(sit-for .5)
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(org-babel-js-initiate-session session))))
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((string= "node" org-babel-js-cmd )
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(error "session evaluation with node.js is not supported"))
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(t
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(error "sessions are only supported with mozrepl add \":cmd mozrepl\"")))))
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(provide 'ob-js)
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;;; ob-js.el ends here
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