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 <ohwoeo...@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 -- 1.8.4
