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
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
| | ;;; shell.el --- specialized comint.el for running the shell -*- lexical-binding: t -*-
;; Copyright (C) 1988, 1993-1997, 2000-2016 Free Software Foundation,
;; Inc.
;; Author: Olin Shivers <shivers@cs.cmu.edu>
;; Simon Marshall <simon@gnu.org>
;; Maintainer: emacs-devel@gnu.org
;; Keywords: processes
;; 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:
;; This file defines a shell-in-a-buffer package (shell mode) built on
;; top of comint mode. This is actually cmushell with things renamed
;; to replace its counterpart in Emacs 18. cmushell is more
;; featureful, robust, and uniform than the Emacs 18 version.
;; Since this mode is built on top of the general command-interpreter-in-
;; a-buffer mode (comint mode), it shares a common base functionality,
;; and a common set of bindings, with all modes derived from comint mode.
;; This makes these modes easier to use.
;; For documentation on the functionality provided by comint mode, and
;; the hooks available for customizing it, see the file comint.el.
;; For further information on shell mode, see the comments below.
;; Needs fixin:
;; When sending text from a source file to a subprocess, the process-mark can
;; move off the window, so you can lose sight of the process interactions.
;; Maybe I should ensure the process mark is in the window when I send
;; text to the process? Switch selectable?
;; YOUR .EMACS FILE
;;=============================================================================
;; Some suggestions for your init file.
;;
;; ;; Define M-# to run some strange command:
;; (eval-after-load "shell"
;; '(define-key shell-mode-map "\M-#" 'shells-dynamic-spell))
;; Brief Command Documentation:
;;============================================================================
;; Comint Mode Commands: (common to shell and all comint-derived modes)
;;
;; m-p comint-previous-input Cycle backwards in input history
;; m-n comint-next-input Cycle forwards
;; m-r comint-previous-matching-input Previous input matching a regexp
;; m-s comint-next-matching-input Next input that matches
;; m-c-l comint-show-output Show last batch of process output
;; return comint-send-input
;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff.
;; c-c c-a comint-bol Beginning of line; skip prompt
;; c-c c-u comint-kill-input ^u
;; c-c c-w backward-kill-word ^w
;; c-c c-c comint-interrupt-subjob ^c
;; c-c c-z comint-stop-subjob ^z
;; c-c c-\ comint-quit-subjob ^\
;; c-c c-o comint-delete-output Delete last batch of process output
;; c-c c-r comint-show-output Show last batch of process output
;; c-c c-l comint-dynamic-list-input-ring List input history
;; send-invisible Read line w/o echo & send to proc
;; comint-continue-subjob Useful if you accidentally suspend
;; top-level job
;; comint-mode-hook is the comint mode hook.
;; Shell Mode Commands:
;; shell Fires up the shell process
;; tab completion-at-point Complete filename/command/history
;; m-? comint-dynamic-list-filename-completions
;; List completions in help buffer
;; c-c c-f shell-forward-command Forward a shell command
;; c-c c-b shell-backward-command Backward a shell command
;; dirs Resync the buffer's dir stack
;; shell-dirtrack-mode Turn dir tracking on/off
;; comint-strip-ctrl-m Remove trailing ^Ms from output
;;
;; The shell mode hook is shell-mode-hook
;; comint-prompt-regexp is initialized to shell-prompt-pattern, for backwards
;; compatibility.
;; Read the rest of this file for more information.
;;; Code:
(require 'comint)
(require 'pcomplete)
;;; Customization and Buffer Variables
(defgroup shell nil
"Running shell from within Emacs buffers."
:group 'processes
:group 'unix)
(defgroup shell-directories nil
"Directory support in shell mode."
:group 'shell)
;; Unused.
;;; (defgroup shell-faces nil
;;; "Faces in shell buffers."
;;; :group 'shell)
;;;###autoload
(defcustom shell-dumb-shell-regexp (purecopy "cmd\\(proxy\\)?\\.exe")
"Regexp to match shells that don't save their command history, and
don't handle the backslash as a quote character. For shells that
match this regexp, Emacs will write out the command history when the
shell finishes, and won't remove backslashes when it unquotes shell
arguments."
:type 'regexp
:group 'shell)
(defcustom shell-prompt-pattern "^[^#$%>\n]*[#$%>] *"
"Regexp to match prompts in the inferior shell.
Defaults to \"^[^#$%>\\n]*[#$%>] *\", which works pretty well.
This variable is used to initialize `comint-prompt-regexp' in the
shell buffer.
If `comint-use-prompt-regexp' is nil, then this variable is only used
to determine paragraph boundaries. See Info node `Shell Prompts' for
how Shell mode treats paragraphs.
The pattern should probably not match more than one line. If it does,
Shell mode may become confused trying to distinguish prompt from input
on lines which don't start with a prompt."
:type 'regexp
:group 'shell)
(defcustom shell-completion-fignore nil
"List of suffixes to be disregarded during file/command completion.
This variable is used to initialize `comint-completion-fignore' in the shell
buffer. The default is nil, for compatibility with most shells.
Some people like (\"~\" \"#\" \"%\")."
:type '(repeat (string :tag "Suffix"))
:group 'shell)
(defcustom shell-delimiter-argument-list '(?\| ?& ?< ?> ?\( ?\) ?\;)
"List of characters to recognize as separate arguments.
This variable is used to initialize `comint-delimiter-argument-list' in the
shell buffer. The value may depend on the operating system or shell."
:type '(choice (const nil)
(repeat :tag "List of characters" character))
:group 'shell)
(defcustom shell-file-name-chars
(if (memq system-type '(ms-dos windows-nt cygwin))
"~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
"[]~/A-Za-z0-9+@:_.$#%,={}-")
"String of characters valid in a file name.
This variable is used to initialize `comint-file-name-chars' in the
shell buffer. The value may depend on the operating system or shell."
:type 'string
:group 'shell)
(defcustom shell-file-name-quote-list
(if (memq system-type '(ms-dos windows-nt))
nil
(append shell-delimiter-argument-list '(?\s ?$ ?\* ?\! ?\" ?\' ?\` ?\# ?\\)))
"List of characters to quote when in a file name.
This variable is used to initialize `comint-file-name-quote-list' in the
shell buffer. The value may depend on the operating system or shell."
:type '(repeat character)
:group 'shell)
(defcustom shell-dynamic-complete-functions
'(comint-c-a-p-replace-by-expanded-history
shell-environment-variable-completion
shell-command-completion
shell-c-a-p-replace-by-expanded-directory
pcomplete-completions-at-point
shell-filename-completion
comint-filename-completion)
"List of functions called to perform completion.
This variable is used to initialize `comint-dynamic-complete-functions' in the
shell buffer."
:type '(repeat function)
:group 'shell)
(defcustom shell-command-regexp "[^;&|\n]+"
"Regexp to match a single command within a pipeline.
This is used for directory tracking and does not do a perfect job."
:type 'regexp
:group 'shell)
(defcustom shell-command-separator-regexp "[;&|\n \t]*"
"Regexp to match a single command within a pipeline.
This is used for directory tracking and does not do a perfect job."
:type 'regexp
:group 'shell)
(defcustom shell-completion-execonly t
"If non-nil, use executable files only for completion candidates.
This mirrors the optional behavior of tcsh.
Detecting executability of files may slow command completion considerably."
:type 'boolean
:group 'shell)
(defcustom shell-popd-regexp "popd"
"Regexp to match subshell commands equivalent to popd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-pushd-regexp "pushd"
"Regexp to match subshell commands equivalent to pushd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-pushd-tohome nil
"If non-nil, make pushd with no arg behave as \"pushd ~\" (like cd).
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-pushd-dextract nil
"If non-nil, make \"pushd +n\" pop the nth dir to the stack top.
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-pushd-dunique nil
"If non-nil, make pushd only add unique directories to the stack.
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-cd-regexp "cd"
"Regexp to match subshell commands equivalent to cd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-chdrive-regexp
(if (memq system-type '(ms-dos windows-nt))
; NetWare allows the five chars between upper and lower alphabetics.
"[]a-zA-Z^_`\\[\\\\]:"
nil)
"If non-nil, is regexp used to track drive changes."
:type '(choice regexp
(const nil))
:group 'shell-directories)
(defcustom shell-dirtrack-verbose t
"If non-nil, show the directory stack following directory change.
This is effective only if directory tracking is enabled.
The `dirtrack' package provides an alternative implementation of this feature -
see the function `dirtrack-mode'."
:type 'boolean
:group 'shell-directories)
(defcustom explicit-shell-file-name nil
"If non-nil, is file name to use for explicitly requested inferior shell."
:type '(choice (const :tag "None" nil) file)
:group 'shell)
;; Note: There are no explicit references to the variable `explicit-csh-args'.
;; It is used implicitly by M-x shell when the shell is `csh'.
(defcustom explicit-csh-args
(if (eq system-type 'hpux)
;; -T persuades HP's csh not to think it is smarter
;; than us about what terminal modes to use.
'("-i" "-T")
'("-i"))
"Args passed to inferior shell by \\[shell], if the shell is csh.
Value is a list of strings, which may be nil."
:type '(repeat (string :tag "Argument"))
:group 'shell)
;; Note: There are no explicit references to the variable `explicit-bash-args'.
;; It is used implicitly by M-x shell when the interactive shell is `bash'.
(defcustom explicit-bash-args
;; Tell bash not to use readline. It's safe to assume --noediting now,
;; as it was introduced in 1996 in Bash version 2.
'("--noediting" "-i")
"Args passed to inferior shell by \\[shell], if the shell is bash.
Value is a list of strings, which may be nil."
:type '(repeat (string :tag "Argument"))
:group 'shell)
(defcustom shell-input-autoexpand 'history
"If non-nil, expand input command history references on completion.
This mirrors the optional behavior of tcsh (its autoexpand and histlit).
If the value is `input', then the expansion is seen on input.
If the value is `history', then the expansion is only when inserting
into the buffer's input ring. See also `comint-magic-space' and
`comint-dynamic-complete-functions'.
This variable supplies a default for `comint-input-autoexpand',
for Shell mode only."
:type '(choice (const :tag "off" nil)
(const input)
(const history)
(const :tag "on" t))
:group 'shell)
(defvar shell-dirstack nil
"List of directories saved by pushd in this buffer's shell.
Thus, this does not include the shell's current directory.")
(defvar shell-dirtrackp t
"Non-nil in a shell buffer means directory tracking is enabled.")
(defvar shell-last-dir nil
"Keep track of last directory for ksh `cd -' command.")
(defvar shell-dirstack-query nil
"Command used by `shell-resync-dirs' to query the shell.")
(defvar shell-mode-map
(let ((map (nconc (make-sparse-keymap) comint-mode-map)))
(define-key map "\C-c\C-f" 'shell-forward-command)
(define-key map "\C-c\C-b" 'shell-backward-command)
(define-key map "\t" 'completion-at-point)
(define-key map (kbd "M-RET") 'shell-resync-dirs)
(define-key map "\M-?" 'comint-dynamic-list-filename-completions)
(define-key map [menu-bar completion]
(cons "Complete"
(copy-keymap (lookup-key comint-mode-map [menu-bar completion]))))
(define-key-after (lookup-key map [menu-bar completion])
[complete-env-variable] '("Complete Env. Variable Name" .
shell-dynamic-complete-environment-variable)
'complete-file)
(define-key-after (lookup-key map [menu-bar completion])
[expand-directory] '("Expand Directory Reference" .
shell-replace-by-expanded-directory)
'complete-expand)
map))
(defcustom shell-mode-hook '()
"Hook for customizing Shell mode."
:type 'hook
:group 'shell)
(defvar shell-font-lock-keywords
'(("[ \t]\\([+-][^ \t\n]+\\)" 1 font-lock-comment-face)
("^[^ \t\n]+:.*" . font-lock-string-face)
("^\\[[1-9][0-9]*\\]" . font-lock-string-face))
"Additional expressions to highlight in Shell mode.")
;;; Basic Procedures
(defun shell--unquote&requote-argument (qstr &optional upos)
(unless upos (setq upos 0))
(let* ((qpos 0)
(dquotes nil)
(ustrs '())
(re (concat
"[\"']"
"\\|\\$\\(?:\\([[:alpha:]][[:alnum:]]*\\)"
"\\|{\\(?1:[^{}]+\\)}\\)"
(when (memq system-type '(ms-dos windows-nt))
"\\|%\\(?1:[^\\\\/]*\\)%")
(when comint-file-name-quote-list
"\\|\\\\\\(.\\)")))
(qupos nil)
(push (lambda (str end)
(push str ustrs)
(setq upos (- upos (length str)))
(unless (or qupos (> upos 0))
(setq qupos (if (< end 0) (- end) (+ upos end))))))
match)
(while (setq match (string-match re qstr qpos))
(funcall push (substring qstr qpos match) match)
(cond
((match-beginning 2) (funcall push (match-string 2 qstr) (match-end 0)))
((match-beginning 1) (funcall push (getenv (match-string 1 qstr))
(- (match-end 0))))
((eq (aref qstr match) ?\") (setq dquotes (not dquotes)))
((eq (aref qstr match) ?\')
(cond
;; treat single quote as text if inside double quotes
(dquotes (funcall push "'" (match-end 0)))
((< (1+ match) (length qstr))
(let ((end (string-match "'" qstr (1+ match))))
(unless end
(setq end (length qstr))
(set-match-data (list match (length qstr))))
(funcall push (substring qstr (1+ match) end) end)))
;; ignore if at the end of string
(t nil)))
(t (error "Unexpected case in shell--unquote&requote-argument!")))
(setq qpos (match-end 0)))
(funcall push (substring qstr qpos) (length qstr))
(list (mapconcat #'identity (nreverse ustrs) "")
qupos #'comint-quote-filename)))
(defun shell--unquote-argument (str)
(car (shell--unquote&requote-argument str)))
(defun shell--requote-argument (upos qstr)
;; See `completion-table-with-quoting'.
(let ((res (shell--unquote&requote-argument qstr upos)))
(cons (nth 1 res) (nth 2 res))))
(defun shell--parse-pcomplete-arguments ()
"Parse whitespace separated arguments in the current region."
;; FIXME: share code with shell--unquote&requote-argument.
(let ((begin (save-excursion (shell-backward-command 1) (point)))
(end (point))
begins args)
(save-excursion
(goto-char begin)
(while (< (point) end)
(skip-chars-forward " \t\n")
(push (point) begins)
(let ((arg ()))
(while (looking-at
(eval-when-compile
(concat
"\\(?:[^\s\t\n\\\"']+"
"\\|'\\([^']*\\)'?"
"\\|\"\\(\\(?:[^\"\\]\\|\\\\.\\)*\\)\"?"
"\\|\\\\\\(\\(?:.\\|\n\\)?\\)\\)")))
(goto-char (match-end 0))
(cond
((match-beginning 3) ;Backslash escape.
(push (cond
((null comint-file-name-quote-list)
(goto-char (match-beginning 3)) "\\")
((= (match-beginning 3) (match-end 3)) "\\")
(t (match-string 3)))
arg))
((match-beginning 2) ;Double quote.
(push (if (null comint-file-name-quote-list) (match-string 2)
(replace-regexp-in-string
"\\\\\\(.\\)" "\\1" (match-string 2)))
arg))
((match-beginning 1) ;Single quote.
(push (match-string 1) arg))
(t (push (match-string 0) arg))))
(push (mapconcat #'identity (nreverse arg) "") args)))
(cons (nreverse args) (nreverse begins)))))
(defun shell-command-completion-function ()
"Completion function for shell command names.
This is the value of `pcomplete-command-completion-function' for
Shell buffers. It implements `shell-completion-execonly' for
`pcomplete' completion."
(pcomplete-here (pcomplete-entries nil
(if shell-completion-execonly
'file-executable-p))))
(defun shell-completion-vars ()
"Setup completion vars for `shell-mode' and `read-shell-command'."
(set (make-local-variable 'comint-completion-fignore)
shell-completion-fignore)
(set (make-local-variable 'comint-delimiter-argument-list)
shell-delimiter-argument-list)
(set (make-local-variable 'comint-file-name-chars) shell-file-name-chars)
(set (make-local-variable 'comint-file-name-quote-list)
shell-file-name-quote-list)
(set (make-local-variable 'comint-dynamic-complete-functions)
shell-dynamic-complete-functions)
(setq-local comint-unquote-function #'shell--unquote-argument)
(setq-local comint-requote-function #'shell--requote-argument)
(set (make-local-variable 'pcomplete-parse-arguments-function)
#'shell--parse-pcomplete-arguments)
(set (make-local-variable 'pcomplete-termination-string)
(cond ((not comint-completion-addsuffix) "")
((stringp comint-completion-addsuffix)
comint-completion-addsuffix)
((not (consp comint-completion-addsuffix)) " ")
(t (cdr comint-completion-addsuffix))))
(set (make-local-variable 'pcomplete-command-completion-function)
#'shell-command-completion-function)
;; Don't use pcomplete's defaulting mechanism, rely on
;; shell-dynamic-complete-functions instead.
(set (make-local-variable 'pcomplete-default-completion-function) #'ignore)
(setq comint-input-autoexpand shell-input-autoexpand)
;; Not needed in shell-mode because it's inherited from comint-mode, but
;; placed here for read-shell-command.
(add-hook 'completion-at-point-functions 'comint-completion-at-point nil t))
(put 'shell-mode 'mode-class 'special)
(define-derived-mode shell-mode comint-mode "Shell"
"Major mode for interacting with an inferior shell.\\<shell-mode-map>
\\[comint-send-input] after the end of the process' output sends the text from
the end of process to the end of the current line.
\\[comint-send-input] before end of process output copies the current line minus the prompt to
the end of the buffer and sends it (\\[comint-copy-old-input] just copies the current line).
\\[send-invisible] reads a line of text without echoing it, and sends it to
the shell. This is useful for entering passwords. Or, add the function
`comint-watch-for-password-prompt' to `comint-output-filter-functions'.
If you want to make multiple shell buffers, rename the `*shell*' buffer
using \\[rename-buffer] or \\[rename-uniquely] and start a new shell.
If you want to make shell buffers limited in length, add the function
`comint-truncate-buffer' to `comint-output-filter-functions'.
If you accidentally suspend your process, use \\[comint-continue-subjob]
to continue it.
`cd', `pushd' and `popd' commands given to the shell are watched by Emacs to
keep this buffer's default directory the same as the shell's working directory.
While directory tracking is enabled, the shell's working directory is displayed
by \\[list-buffers] or \\[mouse-buffer-menu] in the `File' field.
\\[dirs] queries the shell and resyncs Emacs's idea of what the current
directory stack is.
\\[shell-dirtrack-mode] turns directory tracking on and off.
\(The `dirtrack' package provides an alternative implementation of this
feature - see the function `dirtrack-mode'.)
\\{shell-mode-map}
Customization: Entry to this mode runs the hooks on `comint-mode-hook' and
`shell-mode-hook' (in that order). Before each input, the hooks on
`comint-input-filter-functions' are run. After each shell output, the hooks
on `comint-output-filter-functions' are run.
Variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp'
and `shell-popd-regexp' are used to match their respective commands,
while `shell-pushd-tohome', `shell-pushd-dextract' and `shell-pushd-dunique'
control the behavior of the relevant command.
Variables `comint-completion-autolist', `comint-completion-addsuffix',
`comint-completion-recexact' and `comint-completion-fignore' control the
behavior of file name, command name and variable name completion. Variable
`shell-completion-execonly' controls the behavior of command name completion.
Variable `shell-completion-fignore' is used to initialize the value of
`comint-completion-fignore'.
Variables `comint-input-ring-file-name' and `comint-input-autoexpand' control
the initialization of the input ring history, and history expansion.
Variables `comint-output-filter-functions', a hook, and
`comint-scroll-to-bottom-on-input' and `comint-scroll-to-bottom-on-output'
control whether input and output cause the window to scroll to the end of the
buffer."
(setq comint-prompt-regexp shell-prompt-pattern)
(shell-completion-vars)
(set (make-local-variable 'paragraph-separate) "\\'")
(set (make-local-variable 'paragraph-start) comint-prompt-regexp)
(set (make-local-variable 'font-lock-defaults) '(shell-font-lock-keywords t))
(set (make-local-variable 'shell-dirstack) nil)
(set (make-local-variable 'shell-last-dir) nil)
(shell-dirtrack-mode 1)
;; By default, ansi-color applies faces using overlays. This is
;; very inefficient in Shell buffers (e.g. Bug#10835). We use a
;; custom `ansi-color-apply-face-function' to convert color escape
;; sequences into `font-lock-face' properties.
(setq-local ansi-color-apply-face-function #'shell-apply-ansi-color)
(shell-reapply-ansi-color)
;; This is not really correct, since the shell buffer does not really
;; edit this directory. But it is useful in the buffer list and menus.
(setq list-buffers-directory (expand-file-name default-directory))
;; shell-dependent assignments.
(when (ring-empty-p comint-input-ring)
(let ((shell (file-name-nondirectory (car
(process-command (get-buffer-process (current-buffer))))))
(hsize (getenv "HISTSIZE")))
(and (stringp hsize)
(integerp (setq hsize (string-to-number hsize)))
(> hsize 0)
(set (make-local-variable 'comint-input-ring-size) hsize))
(setq comint-input-ring-file-name
(or (getenv "HISTFILE")
(cond ((string-equal shell "bash") "~/.bash_history")
((string-equal shell "ksh") "~/.sh_history")
(t "~/.history"))))
(if (or (equal comint-input-ring-file-name "")
(equal (file-truename comint-input-ring-file-name)
(file-truename "/dev/null")))
(setq comint-input-ring-file-name nil))
;; Arrange to write out the input ring on exit, if the shell doesn't
;; do this itself.
(if (and comint-input-ring-file-name
(string-match shell-dumb-shell-regexp shell))
(set-process-sentinel (get-buffer-process (current-buffer))
#'shell-write-history-on-exit))
(setq shell-dirstack-query
(cond ((string-equal shell "sh") "pwd")
((string-equal shell "ksh") "echo $PWD ~-")
;; Bypass any aliases. TODO all shells could use this.
((string-equal shell "bash") "command dirs")
(t "dirs")))
;; Bypass a bug in certain versions of bash.
(when (string-equal shell "bash")
(add-hook 'comint-preoutput-filter-functions
'shell-filter-ctrl-a-ctrl-b nil t)))
(comint-read-input-ring t)))
(defun shell-apply-ansi-color (beg end face)
"Apply FACE as the ansi-color face for the text between BEG and END."
(when face
(put-text-property beg end 'ansi-color-face face)
(put-text-property beg end 'font-lock-face face)))
(defun shell-reapply-ansi-color ()
"Reapply ansi-color faces to the existing contents of the buffer."
(save-restriction
(widen)
(let* ((pos (point-min))
(end (or (next-single-property-change pos 'ansi-color-face)
(point-max)))
face)
(while end
(if (setq face (get-text-property pos 'ansi-color-face))
(put-text-property pos (or end (point-max))
'font-lock-face face))
(setq pos end
end (next-single-property-change pos 'ansi-color-face))))))
(defun shell-filter-ctrl-a-ctrl-b (string)
"Remove `^A' and `^B' characters from comint output.
Bash uses these characters as internal quoting characters in its
prompt. Due to a bug in some bash versions (including 2.03,
2.04, and 2.05b), they may erroneously show up when bash is
started with the `--noediting' option and Select Graphic
Rendition (SGR) control sequences (formerly known as ANSI escape
sequences) are used to color the prompt.
This function can be put on `comint-preoutput-filter-functions'."
(if (string-match "[\C-a\C-b]" string)
(replace-regexp-in-string "[\C-a\C-b]" "" string t t)
string))
(defun shell-write-history-on-exit (process event)
"Called when the shell process is stopped.
Writes the input history to a history file
`comint-input-ring-file-name' using `comint-write-input-ring'
and inserts a short message in the shell buffer.
This function is a sentinel watching the shell interpreter process.
Sentinels will always get the two parameters PROCESS and EVENT."
;; Write history.
(comint-write-input-ring)
(let ((buf (process-buffer process)))
(when (buffer-live-p buf)
(with-current-buffer buf
(insert (format "\nProcess %s %s\n" process event))))))
;;;###autoload
(defun shell (&optional buffer)
"Run an inferior shell, with I/O through BUFFER (which defaults to `*shell*').
Interactively, a prefix arg means to prompt for BUFFER.
If `default-directory' is a remote file name, it is also prompted
to change if called with a prefix arg.
If BUFFER exists but shell process is not running, make new shell.
If BUFFER exists and shell process is running, just switch to BUFFER.
Program used comes from variable `explicit-shell-file-name',
or (if that is nil) from the ESHELL environment variable,
or (if that is nil) from `shell-file-name'.
If a file `~/.emacs_SHELLNAME' exists, or `~/.emacs.d/init_SHELLNAME.sh',
it is given as initial input (but this may be lost, due to a timing
error, if the shell discards input when it starts up).
The buffer is put in Shell mode, giving commands for sending input
and controlling the subjobs of the shell. See `shell-mode'.
See also the variable `shell-prompt-pattern'.
To specify a coding system for converting non-ASCII characters
in the input and output to the shell, use \\[universal-coding-system-argument]
before \\[shell]. You can also specify this with \\[set-buffer-process-coding-system]
in the shell buffer, after you start the shell.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.
The shell file name (sans directories) is used to make a symbol name
such as `explicit-csh-args'. If that symbol is a variable,
its value is used as a list of arguments when invoking the shell.
Otherwise, one argument `-i' is passed to the shell.
\(Type \\[describe-mode] in the shell buffer for a list of commands.)"
(interactive
(list
(and current-prefix-arg
(prog1
(read-buffer "Shell buffer: "
;; If the current buffer is an inactive
;; shell buffer, use it as the default.
(if (and (eq major-mode 'shell-mode)
(null (get-buffer-process (current-buffer))))
(buffer-name)
(generate-new-buffer-name "*shell*")))
(if (file-remote-p default-directory)
;; It must be possible to declare a local default-directory.
;; FIXME: This can't be right: it changes the default-directory
;; of the current-buffer rather than of the *shell* buffer.
(setq default-directory
(expand-file-name
(read-directory-name
"Default directory: " default-directory default-directory
t nil))))))))
(setq buffer (if (or buffer (not (derived-mode-p 'shell-mode))
(comint-check-proc (current-buffer)))
(get-buffer-create (or buffer "*shell*"))
;; If the current buffer is a dead shell buffer, use it.
(current-buffer)))
;; On remote hosts, the local `shell-file-name' might be useless.
(if (and (called-interactively-p 'any)
(file-remote-p default-directory)
(null explicit-shell-file-name)
(null (getenv "ESHELL")))
(with-current-buffer buffer
(set (make-local-variable 'explicit-shell-file-name)
(file-remote-p
(expand-file-name
(read-file-name
"Remote shell path: " default-directory shell-file-name
t shell-file-name))
'localname))))
;; The buffer's window must be correctly set when we call comint (so
;; that comint sets the COLUMNS env var properly).
(pop-to-buffer buffer)
(unless (comint-check-proc buffer)
(let* ((prog (or explicit-shell-file-name
(getenv "ESHELL") shell-file-name))
(name (file-name-nondirectory prog))
(startfile (concat "~/.emacs_" name))
(xargs-name (intern-soft (concat "explicit-" name "-args"))))
(unless (file-exists-p startfile)
(setq startfile (concat user-emacs-directory "init_" name ".sh")))
(apply 'make-comint-in-buffer "shell" buffer prog
(if (file-exists-p startfile) startfile)
(if (and xargs-name (boundp xargs-name))
(symbol-value xargs-name)
'("-i")))
(shell-mode)))
buffer)
;;; Directory tracking
;;
;; This code provides the shell mode input sentinel
;; SHELL-DIRECTORY-TRACKER
;; that tracks cd, pushd, and popd commands issued to the shell, and
;; changes the current directory of the shell buffer accordingly.
;;
;; This is basically a fragile hack, although it's more accurate than
;; the version in Emacs 18's shell.el. It has the following failings:
;; 1. It doesn't know about the cdpath shell variable.
;; 2. It cannot infallibly deal with command sequences, though it does well
;; with these and with ignoring commands forked in another shell with ()s.
;; 3. More generally, any complex command is going to throw it. Otherwise,
;; you'd have to build an entire shell interpreter in Emacs Lisp. Failing
;; that, there's no way to catch shell commands where cd's are buried
;; inside conditional expressions, aliases, and so forth.
;;
;; The whole approach is a crock. Shell aliases mess it up. File sourcing
;; messes it up. You run other processes under the shell; these each have
;; separate working directories, and some have commands for manipulating
;; their w.d.'s (e.g., the lcd command in ftp). Some of these programs have
;; commands that do *not* affect the current w.d. at all, but look like they
;; do (e.g., the cd command in ftp). In shells that allow you job
;; control, you can switch between jobs, all having different w.d.'s. So
;; simply saying %3 can shift your w.d..
;;
;; The solution is to relax, not stress out about it, and settle for
;; a hack that works pretty well in typical circumstances. Remember
;; that a half-assed solution is more in keeping with the spirit of Unix,
;; anyway. Blech.
;;
;; One good hack not implemented here for users of programmable shells
;; is to program up the shell w.d. manipulation commands to output
;; a coded command sequence to the tty. Something like
;; ESC | <cwd> |
;; where <cwd> is the new current working directory. Then trash the
;; directory tracking machinery currently used in this package, and
;; replace it with a process filter that watches for and strips out
;; these messages.
(defun shell-directory-tracker (str)
"Tracks cd, pushd and popd commands issued to the shell.
This function is called on each input passed to the shell.
It watches for cd, pushd and popd commands and sets the buffer's
default directory to track these commands.
You may toggle this tracking on and off with \\[shell-dirtrack-mode].
If Emacs gets confused, you can resync with the shell with \\[dirs].
\(The `dirtrack' package provides an alternative implementation of this
feature - see the function `dirtrack-mode'.)
See variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp',
and `shell-popd-regexp', while `shell-pushd-tohome', `shell-pushd-dextract',
and `shell-pushd-dunique' control the behavior of the relevant command.
Environment variables are expanded, see function `substitute-in-file-name'."
(if shell-dirtrackp
;; We fail gracefully if we think the command will fail in the shell.
;;; (with-demoted-errors "Directory tracker failure: %s"
;; This fails so often that it seems better to just ignore errors (?).
;; Eg even: foo=/tmp; cd $foo is beyond us (bug#17159).
(ignore-errors
(let ((start (progn (string-match
(concat "^" shell-command-separator-regexp)
str) ; skip whitespace
(match-end 0)))
(case-fold-search)
end cmd arg1)
(while (string-match shell-command-regexp str start)
(setq end (match-end 0)
cmd (comint-arguments (substring str start end) 0 0)
arg1 (comint-arguments (substring str start end) 1 1))
(if arg1
(setq arg1 (shell-unquote-argument arg1)))
(cond ((string-match (concat "\\`\\(" shell-popd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-popd (comint-substitute-in-file-name arg1)))
((string-match (concat "\\`\\(" shell-pushd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-pushd (comint-substitute-in-file-name arg1)))
((string-match (concat "\\`\\(" shell-cd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-cd (comint-substitute-in-file-name arg1)))
((and shell-chdrive-regexp
(string-match (concat "\\`\\(" shell-chdrive-regexp
"\\)\\($\\|[ \t]\\)")
cmd))
(shell-process-cd (comint-substitute-in-file-name cmd))))
(setq start (progn (string-match shell-command-separator-regexp
str end)
;; skip again
(match-end 0))))))))
(defun shell-unquote-argument (string)
"Remove all kinds of shell quoting from STRING."
(save-match-data
(let ((idx 0) next inside
(quote-chars
(if (string-match shell-dumb-shell-regexp
(file-name-nondirectory
(car (process-command (get-buffer-process (current-buffer))))))
"['`\"]"
"[\\'`\"]")))
(while (and (< idx (length string))
(setq next (string-match quote-chars string next)))
(cond ((= (aref string next) ?\\)
(setq string (replace-match "" nil nil string))
(setq next (1+ next)))
((and inside (= (aref string next) inside))
(setq string (replace-match "" nil nil string))
(setq inside nil))
(inside
(setq next (1+ next)))
(t
(setq inside (aref string next))
(setq string (replace-match "" nil nil string)))))
string)))
;; popd [+n]
(defun shell-process-popd (arg)
(let ((num (or (shell-extract-num arg) 0)))
(cond ((and num (= num 0) shell-dirstack)
(shell-cd (shell-prefixed-directory-name (car shell-dirstack)))
(setq shell-dirstack (cdr shell-dirstack))
(shell-dirstack-message))
((and num (> num 0) (<= num (length shell-dirstack)))
(let* ((ds (cons nil shell-dirstack))
(cell (nthcdr (1- num) ds)))
(rplacd cell (cdr (cdr cell)))
(setq shell-dirstack (cdr ds))
(shell-dirstack-message)))
(t
(error "Couldn't popd")))))
;; Return DIR prefixed with comint-file-name-prefix as appropriate.
(defun shell-prefixed-directory-name (dir)
(if (= (length comint-file-name-prefix) 0)
dir
(if (file-name-absolute-p dir)
;; The name is absolute, so prepend the prefix.
(concat comint-file-name-prefix dir)
;; For relative name we assume default-directory already has the prefix.
(expand-file-name dir))))
;; cd [dir]
(defun shell-process-cd (arg)
(let ((new-dir (cond ((zerop (length arg)) (concat comint-file-name-prefix
"~"))
((string-equal "-" arg) shell-last-dir)
(t (shell-prefixed-directory-name arg)))))
(setq shell-last-dir default-directory)
(shell-cd new-dir)
(shell-dirstack-message)))
;; pushd [+n | dir]
(defun shell-process-pushd (arg)
(let ((num (shell-extract-num arg)))
(cond ((zerop (length arg))
;; no arg -- swap pwd and car of stack unless shell-pushd-tohome
(cond (shell-pushd-tohome
(shell-process-pushd (concat comint-file-name-prefix "~")))
(shell-dirstack
(let ((old default-directory))
(shell-cd (car shell-dirstack))
(setq shell-dirstack (cons old (cdr shell-dirstack)))
(shell-dirstack-message)))
(t
(message "Directory stack empty."))))
((numberp num)
;; pushd +n
(cond ((> num (length shell-dirstack))
(message "Directory stack not that deep."))
((= num 0)
(error "Couldn't cd"))
(shell-pushd-dextract
(let ((dir (nth (1- num) shell-dirstack)))
(shell-process-popd arg)
(shell-process-pushd default-directory)
(shell-cd dir)
(shell-dirstack-message)))
(t
(let* ((ds (cons default-directory shell-dirstack))
(dslen (length ds))
(front (nthcdr num ds))
(back (reverse (nthcdr (- dslen num) (reverse ds))))
(new-ds (append front back)))
(shell-cd (car new-ds))
(setq shell-dirstack (cdr new-ds))
(shell-dirstack-message)))))
(t
;; pushd <dir>
(let ((old-wd default-directory))
(shell-cd (shell-prefixed-directory-name arg))
(if (or (null shell-pushd-dunique)
(not (member old-wd shell-dirstack)))
(setq shell-dirstack (cons old-wd shell-dirstack)))
(shell-dirstack-message))))))
;; If STR is of the form +n, for n>0, return n. Otherwise, nil.
(defun shell-extract-num (str)
(and (string-match "^\\+[1-9][0-9]*$" str)
(string-to-number str)))
(defvaralias 'shell-dirtrack-mode 'shell-dirtrackp)
(define-minor-mode shell-dirtrack-mode
"Toggle directory tracking in this shell buffer (Shell Dirtrack mode).
With a prefix argument ARG, enable Shell Dirtrack mode if ARG is
positive, and disable it otherwise. If called from Lisp, enable
the mode if ARG is omitted or nil.
The `dirtrack' package provides an alternative implementation of
this feature; see the function `dirtrack-mode'."
nil nil nil
(setq list-buffers-directory (if shell-dirtrack-mode default-directory))
(if shell-dirtrack-mode
(add-hook 'comint-input-filter-functions 'shell-directory-tracker nil t)
(remove-hook 'comint-input-filter-functions 'shell-directory-tracker t)))
(define-obsolete-function-alias 'shell-dirtrack-toggle 'shell-dirtrack-mode
"23.1")
(defun shell-cd (dir)
"Do normal `cd' to DIR, and set `list-buffers-directory'."
(cd dir)
(if shell-dirtrackp
(setq list-buffers-directory default-directory)))
(defun shell-resync-dirs ()
"Resync the buffer's idea of the current directory stack.
This command queries the shell with the command bound to
`shell-dirstack-query' (default \"dirs\"), reads the next
line output and parses it to form the new directory stack.
DON'T issue this command unless the buffer is at a shell prompt.
Also, note that if some other subprocess decides to do output
immediately after the query, its output will be taken as the
new directory stack -- you lose. If this happens, just do the
command again."
(interactive)
(let* ((proc (get-buffer-process (current-buffer)))
(pmark (process-mark proc))
(started-at-pmark (= (point) (marker-position pmark))))
(save-excursion
(goto-char pmark)
;; If the process echoes commands, don't insert a fake command in
;; the buffer or it will appear twice.
(unless comint-process-echoes
(insert shell-dirstack-query) (insert "\n"))
(sit-for 0) ; force redisplay
(comint-send-string proc shell-dirstack-query)
(comint-send-string proc "\n")
(set-marker pmark (point))
(let ((pt (point))
(regexp
(concat
(if comint-process-echoes
;; Skip command echo if the process echoes
(concat "\\(" (regexp-quote shell-dirstack-query) "\n\\)")
"\\(\\)")
"\\(.+\n\\)")))
;; This extra newline prevents the user's pending input from spoofing us.
(insert "\n") (backward-char 1)
;; Wait for one line.
(while (not (looking-at regexp))
(accept-process-output proc)
(goto-char pt)))
(goto-char pmark) (delete-char 1) ; remove the extra newline
;; That's the dirlist. grab it & parse it.
(let* ((dl (buffer-substring (match-beginning 2) (1- (match-end 2))))
(dl-len (length dl))
(ds '()) ; new dir stack
(i 0))
(while (< i dl-len)
;; regexp = optional whitespace, (non-whitespace), optional whitespace
(string-match "\\s *\\(\\S +\\)\\s *" dl i) ; pick off next dir
(setq ds (cons (concat comint-file-name-prefix
(substring dl (match-beginning 1)
(match-end 1)))
ds))
(setq i (match-end 0)))
(let ((ds (nreverse ds)))
(with-demoted-errors "Couldn't cd: %s"
(shell-cd (car ds))
(setq shell-dirstack (cdr ds)
shell-last-dir (car shell-dirstack))
(shell-dirstack-message)))))
(if started-at-pmark (goto-char (marker-position pmark)))))
;; For your typing convenience:
(defalias 'dirs 'shell-resync-dirs)
;; Show the current dirstack on the message line.
;; Pretty up dirs a bit by changing "/usr/jqr/foo" to "~/foo".
;; (This isn't necessary if the dirlisting is generated with a simple "dirs".)
;; All the commands that mung the buffer's dirstack finish by calling
;; this guy.
(defun shell-dirstack-message ()
(when shell-dirtrack-verbose
(let* ((msg "")
(ds (cons default-directory shell-dirstack))
(home (expand-file-name (concat comint-file-name-prefix "~/")))
(homelen (length home)))
(while ds
(let ((dir (car ds)))
(and (>= (length dir) homelen)
(string= home (substring dir 0 homelen))
(setq dir (concat "~/" (substring dir homelen))))
;; Strip off comint-file-name-prefix if present.
(and comint-file-name-prefix
(>= (length dir) (length comint-file-name-prefix))
(string= comint-file-name-prefix
(substring dir 0 (length comint-file-name-prefix)))
(setq dir (substring dir (length comint-file-name-prefix)))
(setcar ds dir))
(setq msg (concat msg (directory-file-name dir) " "))
(setq ds (cdr ds))))
(message "%s" msg))))
;; This was mostly copied from shell-resync-dirs.
(defun shell-snarf-envar (var)
"Return as a string the shell's value of environment variable VAR."
(let* ((cmd (format "printenv '%s'\n" var))
(proc (get-buffer-process (current-buffer)))
(pmark (process-mark proc)))
(goto-char pmark)
(insert cmd)
(sit-for 0) ; force redisplay
(comint-send-string proc cmd)
(set-marker pmark (point))
(let ((pt (point))) ; wait for 1 line
;; This extra newline prevents the user's pending input from spoofing us.
(insert "\n") (backward-char 1)
(while (not (looking-at ".+\n"))
(accept-process-output proc)
(goto-char pt)))
(goto-char pmark) (delete-char 1) ; remove the extra newline
(buffer-substring (match-beginning 0) (1- (match-end 0)))))
(defun shell-copy-environment-variable (variable)
"Copy the environment variable VARIABLE from the subshell to Emacs.
This command reads the value of the specified environment variable
in the shell, and sets the same environment variable in Emacs
\(what `getenv' in Emacs would return) to that value.
That value will affect any new subprocesses that you subsequently start
from Emacs."
(interactive (list (read-envvar-name "\
Copy Shell environment variable to Emacs: ")))
(setenv variable (shell-snarf-envar variable)))
(defun shell-forward-command (&optional arg)
"Move forward across ARG shell command(s). Does not cross lines.
See `shell-command-regexp'."
(interactive "p")
(let ((limit (line-end-position))
(pt (point)))
(re-search-forward (concat shell-command-regexp "\\([;&|][\t ]*\\)+")
limit 'move arg)
(and (/= pt (point))
(skip-syntax-backward " " pt))))
(defun shell-backward-command (&optional arg)
"Move backward across ARG shell command(s). Does not cross lines.
See `shell-command-regexp'."
(interactive "p")
(let ((limit (save-excursion (comint-bol nil) (point))))
(when (> limit (point))
(setq limit (line-beginning-position)))
(skip-syntax-backward " " limit)
(let ((pt (point)))
(if (re-search-backward
(format "[;&|]+[\t ]*\\(%s\\)" shell-command-regexp) limit 'move arg)
(progn (goto-char (match-beginning 1))
(skip-chars-forward ";&|")))
(and (/= pt (point))
(skip-syntax-forward " " pt)))))
(defun shell-dynamic-complete-command ()
"Dynamically complete the command at point.
This function is similar to `comint-dynamic-complete-filename', except that it
searches `exec-path' (minus trailing `exec-directory') for completion
candidates. Note that this may not be the same as the shell's idea of the
path.
Completion is dependent on the value of `shell-completion-execonly',
`shell-completion-fignore', plus those that affect file completion. See Info
node `Shell Options'.
Returns t if successful."
(interactive)
(let ((data (shell-command-completion)))
(if data
(prog2 (unless (window-minibuffer-p)
(message "Completing command name..."))
(apply #'completion-in-region data)))))
(defun shell-command-completion ()
"Return the completion data for the command at point, if any."
(let ((filename (comint-match-partial-filename)))
(if (and filename
(save-match-data (not (string-match "[~/]" filename)))
(eq (match-beginning 0)
(save-excursion (shell-backward-command 1) (point))))
(shell--command-completion-data))))
(defun shell--command-completion-data ()
"Return the completion data for the command at point."
(let* ((filename (or (comint-match-partial-filename) ""))
(start (if (zerop (length filename)) (point) (match-beginning 0)))
(end (if (zerop (length filename)) (point) (match-end 0)))
(filenondir (file-name-nondirectory filename))
; why cdr? see `shell-dynamic-complete-command'
(path-dirs (append (cdr (reverse exec-path))
(if (memq system-type '(windows-nt ms-dos)) '("."))))
(cwd (file-name-as-directory (expand-file-name default-directory)))
(ignored-extensions
(and comint-completion-fignore
(mapconcat (function (lambda (x) (concat (regexp-quote x) "\\'")))
comint-completion-fignore "\\|")))
(dir "") (comps-in-dir ())
(file "") (abs-file-name "") (completions ()))
;; Go thru each dir in the search path, finding completions.
(while path-dirs
(setq dir (file-name-as-directory (comint-directory (or (car path-dirs) ".")))
comps-in-dir (and (file-accessible-directory-p dir)
(file-name-all-completions filenondir dir)))
;; Go thru each completion found, to see whether it should be used.
(while comps-in-dir
(setq file (car comps-in-dir)
abs-file-name (concat dir file))
(if (and (not (member file completions))
(not (and ignored-extensions
(string-match ignored-extensions file)))
(or (string-equal dir cwd)
(not (file-directory-p abs-file-name)))
(or (null shell-completion-execonly)
(file-executable-p abs-file-name)))
(setq completions (cons file completions)))
(setq comps-in-dir (cdr comps-in-dir)))
(setq path-dirs (cdr path-dirs)))
;; OK, we've got a list of completions.
(list
start end
(lambda (string pred action)
(if (string-match "/" string)
(completion-file-name-table string pred action)
(complete-with-action action completions string pred)))
:exit-function
(lambda (_string finished)
(when (memq finished '(sole finished))
(if (looking-at " ")
(goto-char (match-end 0))
(insert " ")))))))
;; (defun shell-dynamic-complete-as-command ()
;; "Dynamically complete at point as a command.
;; See `shell-dynamic-complete-filename'. Returns t if successful."
;; (apply #'completion-in-region shell--command-completion-data))
(defun shell-dynamic-complete-filename ()
"Dynamically complete the filename at point.
This completes only if point is at a suitable position for a
filename argument."
(interactive)
(let ((data (shell-filename-completion)))
(if data (apply #'completion-in-region data))))
(defun shell-filename-completion ()
"Return the completion data for file name at point, if any."
(let ((opoint (point))
(beg (comint-line-beginning-position)))
(when (save-excursion
(goto-char (if (re-search-backward "[;|&]" beg t)
(match-end 0)
beg))
(re-search-forward "[^ \t][ \t]" opoint t))
(comint-filename-completion))))
(defun shell-match-partial-variable ()
"Return the shell variable at point, or nil if none is found."
(save-excursion
(if (re-search-backward "[^A-Za-z0-9_{(]" nil 'move)
(or (looking-at "\\$") (forward-char 1)))
(if (or (eolp) (looking-at "[^A-Za-z0-9_{($]"))
nil
(looking-at "\\$?[{(]?[A-Za-z0-9_]*[})]?")
(buffer-substring (match-beginning 0) (match-end 0)))))
(defun shell-dynamic-complete-environment-variable ()
"Dynamically complete the environment variable at point.
Completes if after a variable, i.e., if it starts with a \"$\".
This function is similar to `comint-dynamic-complete-filename', except that it
searches `process-environment' for completion candidates. Note that this may
not be the same as the interpreter's idea of variable names. The main problem
with this type of completion is that `process-environment' is the environment
which Emacs started with. Emacs does not track changes to the environment made
by the interpreter. Perhaps it would be more accurate if this function was
called `shell-dynamic-complete-process-environment-variable'.
Returns non-nil if successful."
(interactive)
(let ((data (shell-environment-variable-completion)))
(if data
(prog2 (unless (window-minibuffer-p)
(message "Completing variable name..."))
(apply #'completion-in-region data)))))
(defun shell-environment-variable-completion ()
"Completion data for an environment variable at point, if any."
(let* ((var (shell-match-partial-variable))
(end (match-end 0)))
(when (and (not (zerop (length var))) (eq (aref var 0) ?$))
(let* ((start
(save-excursion
(goto-char (match-beginning 0))
(looking-at "\\$?[({]*")
(match-end 0)))
(variables (mapcar (lambda (x)
(substring x 0 (string-match "=" x)))
process-environment))
(suffix (pcase (char-before start) (?\{ "}") (?\( ")") (_ ""))))
(list start end variables
:exit-function
(lambda (s finished)
(when (memq finished '(sole finished))
(let ((suf (concat suffix
(if (file-directory-p
(comint-directory (getenv s)))
"/"))))
(if (looking-at (regexp-quote suf))
(goto-char (match-end 0))
(insert suf))))))))))
(defun shell-c-a-p-replace-by-expanded-directory ()
"Expand directory stack reference before point.
For use on `completion-at-point-functions'."
(when (comint-match-partial-filename)
(save-excursion
(goto-char (match-beginning 0))
(let ((stack (cons default-directory shell-dirstack))
(index (cond ((looking-at "=-/?")
(length shell-dirstack))
((looking-at "=\\([0-9]+\\)/?")
(string-to-number
(buffer-substring
(match-beginning 1) (match-end 1)))))))
(when index
(let ((start (match-beginning 0))
(end (match-end 0))
(replacement (file-name-as-directory (nth index stack))))
(lambda ()
(cond
((>= index (length stack))
(error "Directory stack not that deep"))
(t
(save-excursion
(goto-char start)
(insert replacement)
(delete-char (- end start)))
(message "Directory item: %d" index)
t)))))))))
(defun shell-replace-by-expanded-directory ()
"Expand directory stack reference before point.
Directory stack references are of the form \"=digit\" or \"=-\".
See `default-directory' and `shell-dirstack'.
Returns t if successful."
(interactive)
(let ((f (shell-c-a-p-replace-by-expanded-directory)))
(if f (funcall f))))
(provide 'shell)
;;; shell.el ends here
|