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| | ;;; org-babel-comint.el --- org-babel functions for interaction with comint buffers
;; Copyright (C) 2009 Eric Schulte
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research, comint
;; 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:
;; These functions build on comint to ease the sending and receiving
;; of commands and results from comint buffers.
;;
;; Note that the buffers in this file are analogous to sessions in
;; org-babel at large.
;;; Code:
(require 'org-babel)
(require 'comint)
(defun org-babel-comint-buffer-livep (buffer)
(let ((buffer (if buffer (get-buffer buffer))))
(and buffer (buffer-live-p buffer) (get-buffer-process buffer) buffer)))
(defmacro org-babel-comint-in-buffer (buffer &rest body)
"Check BUFFER with `org-babel-comint-buffer-livep' then execute
body inside the protection of `save-window-excursion' and
`save-match-data'."
(declare (indent 1))
`(save-window-excursion
(save-match-data
(unless (org-babel-comint-buffer-livep ,buffer)
(error (format "buffer %s doesn't exist or has no process" ,buffer)))
(set-buffer ,buffer)
,@body)))
(defmacro org-babel-comint-with-output (buffer eoe-indicator remove-echo &rest body)
"Evaluate BODY in BUFFER, wait until EOE-INDICATOR appears in
output, then return all process output. This ensures that the
filter is removed in case of an error or user `keyboard-quit'
during execution of body."
(declare (indent 3))
`(org-babel-comint-in-buffer ,buffer
(let ((string-buffer ""))
(flet ((my-filt (text) (setq string-buffer (concat string-buffer text))))
;; setup filter
(add-hook 'comint-output-filter-functions 'my-filt)
(unwind-protect
(progn
;; pass FULL-BODY to process
(goto-char (process-mark (get-buffer-process (current-buffer))))
,@body
;; wait for end-of-evaluation indicator
(while (progn
(goto-char comint-last-input-end)
(not (save-excursion
(and (re-search-forward comint-prompt-regexp nil t)
(re-search-forward (regexp-quote ,eoe-indicator) nil t)))))
(accept-process-output (get-buffer-process (current-buffer)))
;; ;; thought this would allow async background running, but I was wrong...
;; (run-with-timer .5 .5 'accept-process-output (get-buffer-process (current-buffer)))
))
;; remove filter
(remove-hook 'comint-output-filter-functions 'my-filt)))
;; remove echo'd FULL-BODY from input
(if (and ,remove-echo
(string-match
(replace-regexp-in-string "\n" "\r\n" (regexp-quote ,full-body)) string-buffer))
(setq raw (substring string-buffer (match-end 0))))
(split-string string-buffer comint-prompt-regexp))))
(defun org-babel-comint-input-command (buffer cmd)
"Pass CMD to BUFFER The input will not be echoed."
(org-babel-comint-in-buffer buffer
(goto-char (process-mark (get-buffer-process buffer)))
(insert cmd)
(comint-send-input)
(org-babel-comint-wait-for-output buffer)))
(defun org-babel-comint-wait-for-output (buffer)
"Wait until output arrives. Note: this is only safe when
waiting for the result of a single statement (not large blocks of
code)."
(org-babel-comint-in-buffer buffer
(while (progn
(goto-char comint-last-input-end)
(not (and (re-search-forward comint-prompt-regexp nil t)
(goto-char (match-beginning 0))
(string= (face-name (face-at-point))
"comint-highlight-prompt"))))
(accept-process-output (get-buffer-process buffer)))))
(provide 'org-babel-comint)
;;; org-babel-comint.el ends here
|