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
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
;;; ob-shell.el --- Babel Functions for Shell Evaluation -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2018 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating shell source code.
;;; Code:
(require 'ob)
(require 'shell)
(require 'cl-lib)
(declare-function org-babel-comint-in-buffer "ob-comint" (buffer &rest body)
t)
(declare-function org-babel-comint-wait-for-output "ob-comint" (buffer))
(declare-function org-babel-comint-buffer-livep "ob-comint" (buffer))
(declare-function org-babel-comint-with-output "ob-comint" (meta &rest body)
t)
(declare-function org-trim "org" (s &optional keep-lead))
(declare-function orgtbl-to-generic "org-table" (table params))
(defvar org-babel-default-header-args:shell '())
(defvar org-babel-shell-names)
(defun org-babel-shell-initialize ()
"Define execution functions associated to shell names.
This function has to be called whenever `org-babel-shell-names'
is modified outside the Customize interface."
(interactive)
(dolist (name org-babel-shell-names)
(eval `(defun ,(intern (concat "org-babel-execute:" name))
(body params)
,(format "Execute a block of %s commands with Babel." name)
(let ((shell-file-name ,name))
(org-babel-execute:shell body params))))
(eval `(defalias ',(intern (concat "org-babel-variable-assignments:" name))
'org-babel-variable-assignments:shell
,(format "Return list of %s statements assigning to the block's \
variables."
name)))))
(defcustom org-babel-shell-names
'("sh" "bash" "csh" "ash" "dash" "ksh" "mksh" "posh")
"List of names of shell supported by babel shell code blocks.
Call `org-babel-shell-initialize' when modifying this variable
outside the Customize interface."
:group 'org-babel
:type '(repeat (string :tag "Shell name: "))
:set (lambda (symbol value)
(set-default symbol value)
(org-babel-shell-initialize)))
(defun org-babel-execute:shell (body params)
"Execute a block of Shell commands with Babel.
This function is called by `org-babel-execute-src-block'."
(let* ((session (org-babel-sh-initiate-session
(cdr (assq :session params))))
(stdin (let ((stdin (cdr (assq :stdin params))))
(when stdin (org-babel-sh-var-to-string
(org-babel-ref-resolve stdin)))))
(cmdline (cdr (assq :cmdline params)))
(full-body (org-babel-expand-body:generic
body params (org-babel-variable-assignments:shell params))))
(org-babel-reassemble-table
(org-babel-sh-evaluate session full-body params stdin cmdline)
(org-babel-pick-name
(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
(org-babel-pick-name
(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
(defun org-babel-prep-session:shell (session params)
"Prepare SESSION according to the header arguments specified in PARAMS."
(let* ((session (org-babel-sh-initiate-session session))
(var-lines (org-babel-variable-assignments:shell params)))
(org-babel-comint-in-buffer session
(mapc (lambda (var)
(insert var) (comint-send-input nil t)
(org-babel-comint-wait-for-output session)) var-lines))
session))
(defun org-babel-load-session:shell (session body params)
"Load BODY into SESSION."
(save-window-excursion
(let ((buffer (org-babel-prep-session:shell session params)))
(with-current-buffer buffer
(goto-char (process-mark (get-buffer-process (current-buffer))))
(insert (org-babel-chomp body)))
buffer)))
;;; Helper functions
(defun org-babel--variable-assignments:sh-generic
(varname values &optional sep hline)
"Returns a list of statements declaring the values as a generic variable."
(format "%s=%s" varname (org-babel-sh-var-to-sh values sep hline)))
(defun org-babel--variable-assignments:bash_array
(varname values &optional sep hline)
"Returns a list of statements declaring the values as a bash array."
(format "unset %s\ndeclare -a %s=( %s )"
varname varname
(mapconcat
(lambda (value) (org-babel-sh-var-to-sh value sep hline))
values
" ")))
(defun org-babel--variable-assignments:bash_assoc
(varname values &optional sep hline)
"Returns a list of statements declaring the values as bash associative array."
(format "unset %s\ndeclare -A %s\n%s"
varname varname
(mapconcat
(lambda (items)
(format "%s[%s]=%s"
varname
(org-babel-sh-var-to-sh (car items) sep hline)
(org-babel-sh-var-to-sh (cdr items) sep hline)))
values
"\n")))
(defun org-babel--variable-assignments:bash (varname values &optional sep hline)
"Represents the parameters as useful Bash shell variables."
(pcase values
(`((,_ ,_ . ,_) . ,_) ;two-dimensional array
(org-babel--variable-assignments:bash_assoc varname values sep hline))
(`(,_ . ,_) ;simple list
(org-babel--variable-assignments:bash_array varname values sep hline))
(_ ;scalar value
(org-babel--variable-assignments:sh-generic varname values sep hline))))
(defun org-babel-variable-assignments:shell (params)
"Return list of shell statements assigning the block's variables."
(let ((sep (cdr (assq :separator params)))
(hline (when (string= "yes" (cdr (assq :hlines params)))
(or (cdr (assq :hline-string params))
"hline"))))
(mapcar
(lambda (pair)
(if (string-suffix-p "bash" shell-file-name)
(org-babel--variable-assignments:bash
(car pair) (cdr pair) sep hline)
(org-babel--variable-assignments:sh-generic
(car pair) (cdr pair) sep hline)))
(org-babel--get-vars params))))
(defun org-babel-sh-var-to-sh (var &optional sep hline)
"Convert an elisp value to a shell variable.
Convert an elisp var into a string of shell commands specifying a
var of the same value."
(concat "'" (replace-regexp-in-string
"'" "'\"'\"'"
(org-babel-sh-var-to-string var sep hline))
"'"))
(defun org-babel-sh-var-to-string (var &optional sep hline)
"Convert an elisp value to a string."
(let ((echo-var (lambda (v) (if (stringp v) v (format "%S" v)))))
(cond
((and (listp var) (or (listp (car var)) (eq (car var) 'hline)))
(orgtbl-to-generic var (list :sep (or sep "\t") :fmt echo-var
:hline hline)))
((listp var)
(mapconcat echo-var var "\n"))
(t (funcall echo-var var)))))
(defun org-babel-sh-initiate-session (&optional session _params)
"Initiate a session named SESSION according to PARAMS."
(when (and session (not (string= session "none")))
(save-window-excursion
(or (org-babel-comint-buffer-livep session)
(progn
(shell session)
;; Needed for Emacs 23 since the marker is initially
;; undefined and the filter functions try to use it without
;; checking.
(set-marker comint-last-output-start (point))
(get-buffer (current-buffer)))))))
(defvar org-babel-sh-eoe-indicator "echo 'org_babel_sh_eoe'"
"String to indicate that evaluation has completed.")
(defvar org-babel-sh-eoe-output "org_babel_sh_eoe"
"String to indicate that evaluation has completed.")
(defun org-babel-sh-evaluate (session body &optional params stdin cmdline)
"Pass BODY to the Shell process in BUFFER.
If RESULT-TYPE equals `output' then return a list of the outputs
of the statements in BODY, if RESULT-TYPE equals `value' then
return the value of the last statement in BODY."
(let ((results
(cond
((or stdin cmdline) ; external shell script w/STDIN
(let ((script-file (org-babel-temp-file "sh-script-"))
(stdin-file (org-babel-temp-file "sh-stdin-"))
(shebang (cdr (assq :shebang params)))
(padline (not (string= "no" (cdr (assq :padline params))))))
(with-temp-file script-file
(when shebang (insert (concat shebang "\n")))
(when padline (insert "\n"))
(insert body))
(set-file-modes script-file #o755)
(with-temp-file stdin-file (insert (or stdin "")))
(with-temp-buffer
(call-process-shell-command
(concat (if shebang script-file
(format "%s %s" shell-file-name script-file))
(and cmdline (concat " " cmdline)))
stdin-file
(current-buffer))
(buffer-string))))
(session ; session evaluation
(mapconcat
#'org-babel-sh-strip-weird-long-prompt
(mapcar
#'org-trim
(butlast
(org-babel-comint-with-output
(session org-babel-sh-eoe-output t body)
(mapc
(lambda (line)
(insert line)
(comint-send-input nil t)
(while (save-excursion
(goto-char comint-last-input-end)
(not (re-search-forward
comint-prompt-regexp nil t)))
(accept-process-output
(get-buffer-process (current-buffer)))))
(append
(split-string (org-trim body) "\n")
(list org-babel-sh-eoe-indicator))))
2)) "\n"))
('otherwise ; external shell script
(if (and (cdr (assq :shebang params))
(> (length (cdr (assq :shebang params))) 0))
(let ((script-file (org-babel-temp-file "sh-script-"))
(shebang (cdr (assq :shebang params)))
(padline (not (equal "no" (cdr (assq :padline params))))))
(with-temp-file script-file
(when shebang (insert (concat shebang "\n")))
(when padline (insert "\n"))
(insert body))
(set-file-modes script-file #o755)
(org-babel-eval script-file ""))
(org-babel-eval shell-file-name (org-trim body)))))))
(when results
(let ((result-params (cdr (assq :result-params params))))
(org-babel-result-cond result-params
results
(let ((tmp-file (org-babel-temp-file "sh-")))
(with-temp-file tmp-file (insert results))
(org-babel-import-elisp-from-file tmp-file)))))))
(defun org-babel-sh-strip-weird-long-prompt (string)
"Remove prompt cruft from a string of shell output."
(while (string-match "^% +[\r\n$]+ *" string)
(setq string (substring string (match-end 0))))
string)
(provide 'ob-shell)
;;; ob-shell.el ends here
|
