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org-mode/lisp/ob-eval.el
Achim Gratz 94934010d7 ob-eval: make org-babel--shell-command-on-region internal and simplify
* lisp/ob-eval.el (org-babel-eval): Use simplified version of
  `org-babel--shell-command-on-region´, we are the only caller of this
  function.
* lisp/ob-eval.el (org-babel--shell-command-on-region): Replace
  `org-babel-shell-command-on-region´ with a much more simplified
  internal version, remove superfluous DOCSTRING and interactive
  clause, strip out all conditionals which were never used.  Prevent
  deletion of temporary input file to aid debugging when the symbol
  `org-babel--debug-input´ is bound and has non-nil value.
2013-03-02 22:49:46 +01:00

143 lines
5.1 KiB
EmacsLisp

;;; ob-eval.el --- org-babel functions for external code evaluation
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research, comint
;; 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:
;; These functions build existing Emacs support for executing external
;; shell commands.
;;; Code:
(eval-when-compile (require 'cl))
(defvar org-babel-error-buffer-name "*Org-Babel Error Output*")
(declare-function org-babel-temp-file "ob-core" (prefix &optional suffix))
(defun org-babel-eval-error-notify (exit-code stderr)
"Open a buffer to display STDERR and a message with the value of EXIT-CODE."
(let ((buf (get-buffer-create org-babel-error-buffer-name)))
(with-current-buffer buf
(goto-char (point-max))
(save-excursion (insert stderr)))
(display-buffer buf))
(message "Babel evaluation exited with code %S" exit-code))
(defun org-babel-eval (cmd body)
"Run CMD on BODY.
If CMD succeeds then return its results, otherwise display
STDERR with `org-babel-eval-error-notify'."
(let ((err-buff (get-buffer-create " *Org-Babel Error*")) exit-code)
(with-current-buffer err-buff (erase-buffer))
(with-temp-buffer
(insert body)
(setq exit-code
(org-babel--shell-command-on-region
(point-min) (point-max) cmd err-buff))
(if (or (not (numberp exit-code)) (> exit-code 0))
(progn
(with-current-buffer err-buff
(org-babel-eval-error-notify exit-code (buffer-string)))
nil)
(buffer-string)))))
(defun org-babel-eval-read-file (file)
"Return the contents of FILE as a string."
(with-temp-buffer (insert-file-contents file)
(buffer-string)))
(defun org-babel--shell-command-on-region (start end command error-buffer)
"Execute COMMAND in an inferior shell with region as input.
Stripped down version of shell-command-on-region for internal use
in Babel only. This lets us work around errors in the original
function in various versions of Emacs.
"
(let ((input-file (org-babel-temp-file "ob-input-"))
(error-file (if error-buffer (org-babel-temp-file "ob-error-") nil))
;; Unfortunately, `executable-find' does not support file name
;; handlers. Therefore, we could use it in the local case
;; only.
(shell-file-name
(cond ((and (not (file-remote-p default-directory))
(executable-find shell-file-name))
shell-file-name)
((file-executable-p
(concat (file-remote-p default-directory) shell-file-name))
shell-file-name)
("/bin/sh")))
exit-status)
;; There is an error in `process-file' when `error-file' exists.
;; This is fixed in Emacs trunk as of 2012-12-21; let's use this
;; workaround for now.
(unless (file-remote-p default-directory)
(delete-file error-file))
;; we always call this with 'replace, remove conditional
;; Replace specified region with output from command.
(let ((swap (< start end)))
(goto-char start)
(push-mark (point) 'nomsg)
(write-region start end input-file)
(delete-region start end)
(setq exit-status
(process-file shell-file-name input-file
(if error-file
(list t error-file)
t)
nil shell-command-switch command))
(when swap (exchange-point-and-mark)))
(when (and input-file (file-exists-p input-file)
;; bind org-babel--debug-input around the call to keep
;; the temporary input files available for inspection
(not (when (boundp 'org-babel--debug-input)
org-babel--debug-input)))
(delete-file input-file))
(when (and error-file (file-exists-p error-file))
(if (< 0 (nth 7 (file-attributes error-file)))
(with-current-buffer (get-buffer-create error-buffer)
(let ((pos-from-end (- (point-max) (point))))
(or (bobp)
(insert "\f\n"))
;; Do no formatting while reading error file,
;; because that can run a shell command, and we
;; don't want that to cause an infinite recursion.
(format-insert-file error-file nil)
;; Put point after the inserted errors.
(goto-char (- (point-max) pos-from-end)))
(current-buffer)))
(delete-file error-file))
exit-status))
(defun org-babel-eval-wipe-error-buffer ()
"Delete the contents of the Org code block error buffer.
This buffer is named by `org-babel-error-buffer-name'."
(when (get-buffer org-babel-error-buffer-name)
(with-current-buffer org-babel-error-buffer-name
(delete-region (point-min) (point-max)))))
(provide 'ob-eval)
;;; ob-eval.el ends here