Re: [PATCH] Add ob-J.el

[Eric Schulte <schulte.eric@gmail.com>]

Applied, Thanks!

I've played with APL but never seriously, however I can see it being a
perfect tool for manipulating Org-mode tables.

If you have time to put some documentation up on Worg as a new [1]
linked from [2] that'd be great.

I added ob-J to the org-babel-load-languages customization variable and
it is now compiling with make.

Best,

Oleh <ohwoeowho@gmail.com> writes:

> Hi all,
>
> Here's a patch to add babel support for J.
> I couldn't figure out how to make ob-J.elc a target for make,
> maybe someone can fix this.
>
> regards,
> Oleh
>
> From 0139af8534dc33911ed1a24a9702a156ae46c99d Mon Sep 17 00:00:00 2001
> From: Oleh Krehel <ohwoeowho@gmail.com>
> Date: Fri, 20 Dec 2013 14:43:59 +0100
> Subject: [PATCH] Add org-babel support for J.
>
> ---
>  lisp/ob-J.el | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 134 insertions(+)
>  create mode 100644 lisp/ob-J.el
>
> diff --git a/lisp/ob-J.el b/lisp/ob-J.el
> new file mode 100644
> index 0000000..50c1a5a
> --- /dev/null
> +++ b/lisp/ob-J.el
> @@ -0,0 +1,134 @@
> +;;; ob-J.el --- org-babel functions for J evaluation
> +
> +;; Copyright (C) 2011-2013 Free Software Foundation, Inc.
> +
> +;; Author: Oleh Krehel
> +;; Keywords: literate programming, reproducible research
> +;; 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:
> +
> +;; Session interaction depends on `j-console'.
> +
> +;;; Code:
> +(require 'ob)
> +(require 'j-console)
> +
> +(defun org-babel-expand-body:J (body params &optional processed-params)
> +  "Expand BODY according to PARAMS, return the expanded body.
> +PROCESSED-PARAMS isn't used yet."
> +  (org-babel-J-interleave-echos-except-functions body))
> +
> +(defun org-babel-J-interleave-echos (body)
> +  "Interleave echo'' between each source line of BODY."
> +  (mapconcat #'identity (split-string body "\n") "\necho''\n"))
> +
> +(defun org-babel-J-interleave-echos-except-functions (body)
> +  "Interleave echo'' between source lines of BODY that aren't functions."
> +  (if (string-match-m "\\(?:^\\|\n\\)[^\n]*\\(?:1\\|2\\|3\\|4\\) : 0\n.*)" body)
> +      (let ((s1 (substring body 0 (match-beginning 0)))
> +	    (s2 (match-string 0 body))
> +	    (s3 (substring body (match-end 0))))
> +	(concat
> +	 (org-babel-J-interleave-echos s1)
> +	 "\necho''\n"
> +	 s2
> +	 (org-babel-J-interleave-echos-except-functions s3)))
> +    (org-babel-J-interleave-echos body)))
> +
> +(defun org-babel-execute:J (body params)
> +  "Execute a block of J code BODY.
> +PARAMS are given by org-babel.
> +This function is called by `org-babel-execute-src-block'"
> +  (message "executing J source code block")
> +  (let* ((processed-params (org-babel-process-params params))
> +	 (sessionp (cdr (assoc :session params)))
> +         (session (org-babel-j-initiate-session sessionp))
> +         (vars (second processed-params))
> +         (result-params (third processed-params))
> +         (result-type (fourth processed-params))
> +         (full-body (org-babel-expand-body:J
> +                     body params processed-params))
> +	 (tmp-script-file (org-babel-temp-file "J-src")))
> +    (org-babel-J-strip-whitespace
> +     (if (string= sessionp "none")
> +	 (progn
> +	   (with-temp-file tmp-script-file
> +	     (insert full-body))
> +	   (org-babel-eval (format "jconsole < %s" tmp-script-file) ""))
> +       (org-babel-J-eval-string full-body)))))
> +
> +(defun org-babel-J-eval-string (str)
> +  "Sends STR to the `j-console-cmd' session and exectues it."
> +  (let ((session (j-console-ensure-session)))
> +    (with-current-buffer (process-buffer session)
> +      (goto-char (point-max))
> +      (insert (format "\n%s\n" str))
> +      (let ((beg (point)))
> +	(comint-send-input)
> +	(sit-for .1)
> +	(buffer-substring-no-properties
> +	 beg (point-max))))))
> +
> +(defun org-babel-J-strip-whitespace (str)
> +  "Remove whitespace from jconsole output STR."
> +  (let ((strs (split-string str "\n" t))
> +	out cur s)
> +    (while (setq s (pop strs))
> +      (if (string-match "^ *$" s)
> +	  (progn (push (nreverse cur) out)
> +		 (setq cur))
> +	(push s cur)))
> +    (mapconcat #'org-babel-J-print-block
> +	       (delq nil (nreverse out))
> +	       "\n\n")))
> +
> +(defun org-babel-J-print-block (x)
> +  "Prettify jconsole output X."
> +  (if (= 1 (length x))
> +      (obj-strip-leading-ws (car x))
> +    ;; assume only first row is misaligned
> +    (let ((n1 (obj-match-second-space (car x)))
> +	  (n2 (obj-match-second-space (cadr x))))
> +      (setcar
> +       x
> +       (if (and n1 n2)
> +	   (substring (car x) (- n1 n2))
> +	 (obj-strip-leading-ws (car x))))
> +      (mapconcat #'identity x "\n"))))
> +
> +(defun obj-match-second-space (s)
> +  "Return position of second space in S or nil."
> +  (and (string-match "^ *[^ ]+\\( \\)" s)
> +       (match-beginning 1)))
> +
> +(defun obj-strip-leading-ws (s)
> +  "String leading whitespace from S."
> +  (and (string-match "^ *\\([^ ].*\\)" s)
> +       (match-string 1 s)))
> +
> +(defun org-babel-j-initiate-session (&optional session)
> +  "Initiate a J session.
> +SESSION is a parameter given by org-babel."
> +  (unless (string= session "none")
> +    (require 'j-console)
> +    (j-console-ensure-session)))
> +
> +(provide 'ob-J)
> +
> +;;; ob-J.el ends here


Footnotes: 
[1]  http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-j.html

[2]  http://orgmode.org/worg/org-contrib/babel/languages.html

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D