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134 lines
4.4 KiB
EmacsLisp
134 lines
4.4 KiB
EmacsLisp
;;; ob-J.el --- org-babel functions for J evaluation
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;; Copyright (C) 2011-2013 Free Software Foundation, Inc.
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;; Author: Oleh Krehel
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Session interaction depends on `j-console'.
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;;; Code:
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(require 'ob)
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(defun org-babel-expand-body:J (body params &optional processed-params)
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"Expand BODY according to PARAMS, return the expanded body.
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PROCESSED-PARAMS isn't used yet."
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(org-babel-J-interleave-echos-except-functions body))
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(defun org-babel-J-interleave-echos (body)
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"Interleave echo'' between each source line of BODY."
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(mapconcat #'identity (split-string body "\n") "\necho''\n"))
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(defun org-babel-J-interleave-echos-except-functions (body)
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"Interleave echo'' between source lines of BODY that aren't functions."
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(if (string-match-m "\\(?:^\\|\n\\)[^\n]*\\(?:1\\|2\\|3\\|4\\) : 0\n.*)" body)
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(let ((s1 (substring body 0 (match-beginning 0)))
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(s2 (match-string 0 body))
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(s3 (substring body (match-end 0))))
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(concat
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(org-babel-J-interleave-echos s1)
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"\necho''\n"
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s2
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(org-babel-J-interleave-echos-except-functions s3)))
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(org-babel-J-interleave-echos body)))
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(defun org-babel-execute:J (body params)
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"Execute a block of J code BODY.
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PARAMS are given by org-babel.
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This function is called by `org-babel-execute-src-block'"
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(message "executing J source code block")
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(let* ((processed-params (org-babel-process-params params))
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(sessionp (cdr (assoc :session params)))
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(session (org-babel-j-initiate-session sessionp))
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(vars (second processed-params))
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(result-params (third processed-params))
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(result-type (fourth processed-params))
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(full-body (org-babel-expand-body:J
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body params processed-params))
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(tmp-script-file (org-babel-temp-file "J-src")))
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(org-babel-J-strip-whitespace
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(if (string= sessionp "none")
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(progn
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(with-temp-file tmp-script-file
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(insert full-body))
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(org-babel-eval (format "jconsole < %s" tmp-script-file) ""))
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(org-babel-J-eval-string full-body)))))
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(defun org-babel-J-eval-string (str)
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"Sends STR to the `j-console-cmd' session and exectues it."
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(let ((session (j-console-ensure-session)))
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(with-current-buffer (process-buffer session)
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(goto-char (point-max))
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(insert (format "\n%s\n" str))
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(let ((beg (point)))
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(comint-send-input)
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(sit-for .1)
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(buffer-substring-no-properties
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beg (point-max))))))
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(defun org-babel-J-strip-whitespace (str)
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"Remove whitespace from jconsole output STR."
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(let ((strs (split-string str "\n" t))
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out cur s)
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(while (setq s (pop strs))
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(if (string-match "^ *$" s)
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(progn (push (nreverse cur) out)
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(setq cur))
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(push s cur)))
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(mapconcat #'org-babel-J-print-block
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(delq nil (nreverse out))
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"\n\n")))
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(defun org-babel-J-print-block (x)
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"Prettify jconsole output X."
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(if (= 1 (length x))
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(obj-strip-leading-ws (car x))
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;; assume only first row is misaligned
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(let ((n1 (obj-match-second-space (car x)))
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(n2 (obj-match-second-space (cadr x))))
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(setcar
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x
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(if (and n1 n2)
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(substring (car x) (- n1 n2))
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(obj-strip-leading-ws (car x))))
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(mapconcat #'identity x "\n"))))
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(defun obj-match-second-space (s)
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"Return position of second space in S or nil."
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(and (string-match "^ *[^ ]+\\( \\)" s)
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(match-beginning 1)))
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(defun obj-strip-leading-ws (s)
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"String leading whitespace from S."
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(and (string-match "^ *\\([^ ].*\\)" s)
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(match-string 1 s)))
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(defun org-babel-j-initiate-session (&optional session)
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"Initiate a J session.
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SESSION is a parameter given by org-babel."
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(unless (string= session "none")
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(require 'j-console)
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(j-console-ensure-session)))
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(provide 'ob-J)
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;;; ob-J.el ends here
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