1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
;;; ob-eval.el --- org-babel functions for external code evaluation
;; Copyright (C) 2009-2012 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*")
(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 t 'replace 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
&optional output-buffer replace
error-buffer display-error-buffer)
"Execute COMMAND in an inferior shell with region as input.
Fixes bugs in the emacs 23.1.1 version of `shell-command-on-region'
Normally display output (if any) in temp buffer `*Shell Command Output*';
Prefix arg means replace the region with it. Return the exit code of
COMMAND.
To specify a coding system for converting non-ASCII characters in
the input and output to the shell command, use
\\[universal-coding-system-argument] before this command. By
default, the input (from the current buffer) is encoded in the
same coding system that will be used to save the file,
`buffer-file-coding-system'. If the output is going to replace
the region, then it is decoded from that same coding system.
The noninteractive arguments are START, END, COMMAND,
OUTPUT-BUFFER, REPLACE, ERROR-BUFFER, and DISPLAY-ERROR-BUFFER.
Noninteractive callers can specify coding systems by binding
`coding-system-for-read' and `coding-system-for-write'.
If the command generates output, the output may be displayed
in the echo area or in a buffer.
If the output is short enough to display in the echo area
\(determined by the variable `max-mini-window-height' if
`resize-mini-windows' is non-nil), it is shown there. Otherwise
it is displayed in the buffer `*Shell Command Output*'. The output
is available in that buffer in both cases.
If there is output and an error, a message about the error
appears at the end of the output.
If there is no output, or if output is inserted in the current buffer,
then `*Shell Command Output*' is deleted.
If the optional fourth argument OUTPUT-BUFFER is non-nil,
that says to put the output in some other buffer.
If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
If OUTPUT-BUFFER is not a buffer and not nil,
insert output in the current buffer.
In either case, the output is inserted after point (leaving mark after it).
If REPLACE, the optional fifth argument, is non-nil, that means insert
the output in place of text from START to END, putting point and mark
around it.
If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer
or buffer name to which to direct the command's standard error output.
If it is nil, error output is mingled with regular output.
If DISPLAY-ERROR-BUFFER is non-nil, display the error buffer if there
were any errors. (This is always t, interactively.)
In an interactive call, the variable `shell-command-default-error-buffer'
specifies the value of ERROR-BUFFER."
(interactive (let (string)
(unless (mark)
(error "The mark is not set now, so there is no region"))
;; Do this before calling region-beginning
;; and region-end, in case subprocess output
;; relocates them while we are in the minibuffer.
(setq string (read-shell-command "Shell command on region: "))
;; call-interactively recognizes region-beginning and
;; region-end specially, leaving them in the history.
(list (region-beginning) (region-end)
string
current-prefix-arg
current-prefix-arg
shell-command-default-error-buffer
t)))
(let ((input-file (org-babel-temp-file "input-"))
(error-file (if error-buffer (org-babel-temp-file "scor-") nil))
(shell-file-name
(if (file-executable-p
(concat (file-remote-p default-directory) shell-file-name))
shell-file-name
"/bin/sh"))
exit-status)
(if (or replace
(and output-buffer
(not (or (bufferp output-buffer) (stringp output-buffer)))))
;; Replace specified region with output from command.
(let ((swap (and replace (< start end))))
;; Don't muck with mark unless REPLACE says we should.
(goto-char start)
(and replace (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 output-buffer error-file)
t)
nil shell-command-switch command))
;; It is rude to delete a buffer which the command is not using.
;; (let ((shell-buffer (get-buffer "*Shell Command Output*")))
;; (and shell-buffer (not (eq shell-buffer (current-buffer)))
;; (kill-buffer shell-buffer)))
;; Don't muck with mark unless REPLACE says we should.
(and replace swap (exchange-point-and-mark)))
;; No prefix argument: put the output in a temp buffer,
;; replacing its entire contents.
(let ((buffer (get-buffer-create
(or output-buffer "*Shell Command Output*"))))
(unwind-protect
(if (eq buffer (current-buffer))
;; If the input is the same buffer as the output,
;; delete everything but the specified region,
;; then replace that region with the output.
(progn (setq buffer-read-only nil)
(delete-region (max start end) (point-max))
(delete-region (point-min) (min start end))
(write-region (point-min) (point-max) input-file)
(delete-region (point-min) (point-max))
(setq exit-status
(process-file shell-file-name input-file
(if error-file
(list t error-file)
t)
nil shell-command-switch command)))
;; Clear the output buffer, then run the command with
;; output there.
(let ((directory default-directory))
(with-current-buffer buffer
(setq buffer-read-only nil)
(if (not output-buffer)
(setq default-directory directory))
(erase-buffer)))
(setq exit-status
(process-file shell-file-name nil
(if error-file
(list buffer error-file)
buffer)
nil shell-command-switch command)))
;; Report the output.
(with-current-buffer buffer
(setq mode-line-process
(cond ((null exit-status)
" - Error")
((stringp exit-status)
(format " - Signal [%s]" exit-status))
((not (equal 0 exit-status))
(format " - Exit [%d]" exit-status)))))
(if (with-current-buffer buffer (> (point-max) (point-min)))
;; There's some output, display it
(display-message-or-buffer buffer)
;; No output; error?
(let ((output
(if (and error-file
(< 0 (nth 7 (file-attributes error-file))))
"some error output"
"no output")))
(cond ((null exit-status)
(message "(Shell command failed with error)"))
((equal 0 exit-status)
(message "(Shell command succeeded with %s)"
output))
((stringp exit-status)
(message "(Shell command killed by signal %s)"
exit-status))
(t
(message "(Shell command failed with code %d and %s)"
exit-status output))))
;; Don't kill: there might be useful info in the undo-log.
;; (kill-buffer buffer)
))))
(when (and input-file (file-exists-p input-file))
(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)))
(and display-error-buffer
(display-buffer (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
|
