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
|
;;; vc-rcs.el --- support for RCS version-control
;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
;; 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
;; $Id$
;; 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, 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; See vc.el
;;; Code:
;;;
;;; Customization options
;;;
(eval-when-compile
(require 'cl)
(require 'vc))
(defcustom vc-rcs-release nil
"*The release number of your RCS installation, as a string.
If nil, VC itself computes this value when it is first needed."
:type '(choice (const :tag "Auto" nil)
(string :tag "Specified")
(const :tag "Unknown" unknown))
:group 'vc)
(defcustom vc-rcs-register-switches nil
"*Extra switches for registering a file in RCS.
A string or list of strings. These are passed to the checkin program
by \\[vc-rcs-register]."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "21.1"
:group 'vc)
(defcustom vc-rcs-diff-switches nil
"*A string or list of strings specifying extra switches for rcsdiff under VC."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "21.1"
:group 'vc)
(defcustom vc-rcs-header (or (cdr (assoc 'RCS vc-header-alist)) '("\$Id\$"))
"*Header keywords to be inserted by `vc-insert-headers'."
:type '(repeat string)
:version "21.1"
:group 'vc)
(defcustom vc-rcsdiff-knows-brief nil
"*Indicates whether rcsdiff understands the --brief option.
The value is either `yes', `no', or nil. If it is nil, VC tries
to use --brief and sets this variable to remember whether it worked."
:type '(choice (const :tag "Work out" nil) (const yes) (const no))
:group 'vc)
;;;###autoload
(defcustom vc-rcs-master-templates
'("%sRCS/%s,v" "%s%s,v" "%sRCS/%s")
"*Where to look for RCS master files.
For a description of possible values, see `vc-check-master-templates'."
:type '(choice (const :tag "Use standard RCS file names"
'("%sRCS/%s,v" "%s%s,v" "%sRCS/%s"))
(repeat :tag "User-specified"
(choice string
function)))
:version "21.1"
:group 'vc)
;;;
;;; State-querying functions
;;;
;;; The autoload cookie below places vc-rcs-registered directly into
;;; loaddefs.el, so that vc-rcs.el does not need to be loaded for
;;; every file that is visited. The definition is repeated below
;;; so that Help and etags can find it.
;;;###autoload (defun vc-rcs-registered (f) (vc-default-registered 'RCS f))
(defun vc-rcs-registered (f) (vc-default-registered 'RCS f))
(defun vc-rcs-state (file)
"Implementation of `vc-state' for RCS."
(or (boundp 'vc-rcs-headers-result)
(and vc-consult-headers
(vc-rcs-consult-headers file)))
(let ((state
;; vc-workfile-version might not be known; in that case the
;; property is nil. vc-rcs-fetch-master-state knows how to
;; handle that.
(vc-rcs-fetch-master-state file
(vc-file-getprop file
'vc-workfile-version))))
(if (not (eq state 'up-to-date))
state
(if (vc-workfile-unchanged-p file)
'up-to-date
(if (eq (vc-checkout-model file) 'locking)
'unlocked-changes
'edited)))))
(defun vc-rcs-state-heuristic (file)
"State heuristic for RCS."
(let (vc-rcs-headers-result)
(if (and vc-consult-headers
(setq vc-rcs-headers-result
(vc-rcs-consult-headers file))
(eq vc-rcs-headers-result 'rev-and-lock))
(let ((state (vc-file-getprop file 'vc-state)))
;; If the headers say that the file is not locked, the
;; permissions can tell us whether locking is used for
;; the file or not.
(if (and (eq state 'up-to-date)
(not (vc-mistrust-permissions file)))
(cond
((string-match ".rw..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'implicit)
(setq state
(if (vc-rcs-workfile-is-newer file)
'edited
'up-to-date)))
((string-match ".r-..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'locking))))
state)
(if (not (vc-mistrust-permissions file))
(let* ((attributes (file-attributes file 'string))
(owner-name (nth 2 attributes))
(permissions (nth 8 attributes)))
(cond ((string-match ".r-..-..-." permissions)
(vc-file-setprop file 'vc-checkout-model 'locking)
'up-to-date)
((string-match ".rw..-..-." permissions)
(if (eq (vc-checkout-model file) 'locking)
(if (file-ownership-preserved-p file)
'edited
owner-name)
(if (vc-rcs-workfile-is-newer file)
'edited
'up-to-date)))
(t
;; Strange permissions. Fall through to
;; expensive state computation.
(vc-rcs-state file))))
(vc-rcs-state file)))))
(defun vc-rcs-workfile-version (file)
"RCS-specific version of `vc-workfile-version'."
(or (and vc-consult-headers
(vc-rcs-consult-headers file)
(vc-file-getprop file 'vc-workfile-version))
(progn
(vc-rcs-fetch-master-state file)
(vc-file-getprop file 'vc-workfile-version))))
(defun vc-rcs-latest-on-branch-p (file &optional version)
"Return non-nil if workfile version of FILE is the latest on its branch.
When VERSION is given, perform check for that version."
(unless version (setq version (vc-workfile-version file)))
(with-temp-buffer
(string= version
(if (vc-trunk-p version)
(progn
;; Compare VERSION to the head version number.
(vc-insert-file (vc-name file) "^[0-9]")
(vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
;; If we are not on the trunk, we need to examine the
;; whole current branch.
(vc-insert-file (vc-name file) "^desc")
(vc-rcs-find-most-recent-rev (vc-branch-part version))))))
(defun vc-rcs-checkout-model (file)
"RCS-specific version of `vc-checkout-model'."
(let (result)
(when vc-consult-headers
(vc-file-setprop file 'vc-checkout-model nil)
(vc-rcs-consult-headers file)
(setq result (vc-file-getprop file 'vc-checkout-model)))
(or result
(progn (vc-rcs-fetch-master-state file)
(vc-file-getprop file 'vc-checkout-model)))))
(defun vc-rcs-workfile-unchanged-p (file)
"RCS-specific implementation of `vc-workfile-unchanged-p'."
;; Try to use rcsdiff --brief. If rcsdiff does not understand that,
;; do a double take and remember the fact for the future
(let* ((version (concat "-r" (vc-workfile-version file)))
(status (if (eq vc-rcsdiff-knows-brief 'no)
(vc-do-command nil 1 "rcsdiff" file version)
(vc-do-command nil 2 "rcsdiff" file "--brief" version))))
(if (eq status 2)
(if (not vc-rcsdiff-knows-brief)
(setq vc-rcsdiff-knows-brief 'no
status (vc-do-command nil 1 "rcsdiff" file version))
(error "rcsdiff failed"))
(if (not vc-rcsdiff-knows-brief) (setq vc-rcsdiff-knows-brief 'yes)))
;; The workfile is unchanged if rcsdiff found no differences.
(zerop status)))
(defun vc-rcs-find-file-not-found-hook ()
(if (yes-or-no-p
(format "File %s was lost; check out from version control? "
(file-name-nondirectory buffer-file-name)))
(save-excursion
(require 'vc)
(let ((default-directory (file-name-directory buffer-file-name)))
(not (vc-error-occurred (vc-checkout buffer-file-name)))))))
;;;
;;; State-changing functions
;;;
(defun vc-rcs-register (file &optional rev comment)
"Register FILE into the RCS version-control system.
REV is the optional revision number for the file. COMMENT can be used
to provide an initial description of FILE.
`vc-register-switches' and `vc-rcs-register-switches' are passed to
the RCS command (in that order).
Automatically retrieve a read-only version of the file with keywords
expanded if `vc-keep-workfiles' is non-nil, otherwise, delete the workfile."
(let ((subdir (expand-file-name "RCS" (file-name-directory file))))
(and (not (file-exists-p subdir))
(not (directory-files (file-name-directory file)
nil ".*,v$" t))
(yes-or-no-p "Create RCS subdirectory? ")
(make-directory subdir))
(apply 'vc-do-command nil 0 "ci" file
;; if available, use the secure registering option
(and (vc-rcs-release-p "5.6.4") "-i")
(concat (if vc-keep-workfiles "-u" "-r") rev)
(and comment (concat "-t-" comment))
(vc-switches 'RCS 'register))
;; parse output to find master file name and workfile version
(with-current-buffer "*vc*"
(goto-char (point-min))
(let ((name (if (looking-at (concat "^\\(.*\\) <-- "
(file-name-nondirectory file)))
(match-string 1))))
(if (not name)
;; if we couldn't find the master name,
;; run vc-rcs-registered to get it
;; (will be stored into the vc-name property)
(vc-rcs-registered file)
(vc-file-setprop file 'vc-name
(if (file-name-absolute-p name)
name
(expand-file-name
name
(file-name-directory file))))))
(vc-file-setprop file 'vc-workfile-version
(if (re-search-forward
"^initial revision: \\([0-9.]+\\).*\n"
nil t)
(match-string 1))))))
(defun vc-rcs-responsible-p (file)
"Return non-nil if RCS thinks it would be responsible for registering FILE."
;; TODO: check for all the patterns in vc-rcs-master-templates
(file-directory-p (expand-file-name "RCS" (file-name-directory file))))
(defun vc-rcs-receive-file (file rev)
"Implementation of receive-file for RCS."
(let ((checkout-model (vc-checkout-model file)))
(vc-rcs-register file rev "")
(when (eq checkout-model 'implicit)
(vc-rcs-set-non-strict-locking file))
(vc-rcs-set-default-branch file (concat rev ".1"))))
(defun vc-rcs-unregister (file)
"Unregister FILE from RCS.
If this leaves the RCS subdirectory empty, ask the user
whether to remove it."
(let* ((master (vc-name file))
(dir (file-name-directory master))
(backup-info (find-backup-file-name master)))
(if (not backup-info)
(delete-file master)
(rename-file master (car backup-info) 'ok-if-already-exists)
(dolist (f (cdr backup-info)) (ignore-errors (delete-file f))))
(and (string= (file-name-nondirectory (directory-file-name dir)) "RCS")
;; check whether RCS dir is empty, i.e. it does not
;; contain any files except "." and ".."
(not (directory-files dir nil
"^\\([^.]\\|\\.[^.]\\|\\.\\.[^.]\\).*"))
(yes-or-no-p (format "Directory %s is empty; remove it? " dir))
(delete-directory dir))))
(defun vc-rcs-checkin (file rev comment)
"RCS-specific version of `vc-backend-checkin'."
(let ((switches (vc-switches 'RCS 'checkin)))
(let ((old-version (vc-workfile-version file)) new-version
(default-branch (vc-file-getprop file 'vc-rcs-default-branch)))
;; Force branch creation if an appropriate
;; default branch has been set.
(and (not rev)
default-branch
(string-match (concat "^" (regexp-quote old-version) "\\.")
default-branch)
(setq rev default-branch)
(setq switches (cons "-f" switches)))
(if (and (not rev) old-version)
(setq rev (vc-branch-part old-version)))
(apply 'vc-do-command nil 0 "ci" (vc-name file)
;; if available, use the secure check-in option
(and (vc-rcs-release-p "5.6.4") "-j")
(concat (if vc-keep-workfiles "-u" "-r") rev)
(concat "-m" comment)
switches)
(vc-file-setprop file 'vc-workfile-version nil)
;; determine the new workfile version
(set-buffer "*vc*")
(goto-char (point-min))
(when (or (re-search-forward
"new revision: \\([0-9.]+\\);" nil t)
(re-search-forward
"reverting to previous revision \\([0-9.]+\\)" nil t))
(setq new-version (match-string 1))
(vc-file-setprop file 'vc-workfile-version new-version))
;; if we got to a different branch, adjust the default
;; branch accordingly
(cond
((and old-version new-version
(not (string= (vc-branch-part old-version)
(vc-branch-part new-version))))
(vc-rcs-set-default-branch file
(if (vc-trunk-p new-version) nil
(vc-branch-part new-version)))
;; If this is an old RCS release, we might have
;; to remove a remaining lock.
(if (not (vc-rcs-release-p "5.6.2"))
;; exit status of 1 is also accepted.
;; It means that the lock was removed before.
(vc-do-command nil 1 "rcs" (vc-name file)
(concat "-u" old-version))))))))
(defun vc-rcs-find-version (file rev buffer)
(apply 'vc-do-command
buffer 0 "co" (vc-name file)
"-q" ;; suppress diagnostic output
(concat "-p" rev)
(vc-switches 'RCS 'checkout)))
(defun vc-rcs-checkout (file &optional editable rev)
"Retrieve a copy of a saved version of FILE."
(let ((file-buffer (get-file-buffer file))
switches)
(message "Checking out %s..." file)
(save-excursion
;; Change buffers to get local value of vc-checkout-switches.
(if file-buffer (set-buffer file-buffer))
(setq switches (vc-switches 'RCS 'checkout))
;; Save this buffer's default-directory
;; and use save-excursion to make sure it is restored
;; in the same buffer it was saved in.
(let ((default-directory default-directory))
(save-excursion
;; Adjust the default-directory so that the check-out creates
;; the file in the right place.
(setq default-directory (file-name-directory file))
(let (new-version)
;; if we should go to the head of the trunk,
;; clear the default branch first
(and rev (string= rev "")
(vc-rcs-set-default-branch file nil))
;; now do the checkout
(apply 'vc-do-command
nil 0 "co" (vc-name file)
;; If locking is not strict, force to overwrite
;; the writable workfile.
(if (eq (vc-checkout-model file) 'implicit) "-f")
(if editable "-l")
(if (stringp rev)
;; a literal revision was specified
(concat "-r" rev)
(let ((workrev (vc-workfile-version file)))
(if workrev
(concat "-r"
(if (not rev)
;; no revision specified:
;; use current workfile version
workrev
;; REV is t ...
(if (not (vc-trunk-p workrev))
;; ... go to head of current branch
(vc-branch-part workrev)
;; ... go to head of trunk
(vc-rcs-set-default-branch file
nil)
""))))))
switches)
;; determine the new workfile version
(with-current-buffer "*vc*"
(setq new-version
(vc-parse-buffer "^revision \\([0-9.]+\\).*\n" 1)))
(vc-file-setprop file 'vc-workfile-version new-version)
;; if necessary, adjust the default branch
(and rev (not (string= rev ""))
(vc-rcs-set-default-branch
file
(if (vc-rcs-latest-on-branch-p file new-version)
(if (vc-trunk-p new-version) nil
(vc-branch-part new-version))
new-version)))))
(message "Checking out %s...done" file)))))
(defun vc-rcs-revert (file &optional contents-done)
"Revert FILE to the version it was based on."
(vc-do-command nil 0 "co" (vc-name file) "-f"
(concat (if (eq (vc-state file) 'edited) "-u" "-r")
(vc-workfile-version file))))
(defun vc-rcs-cancel-version (file editable)
"Undo the most recent checkin of FILE.
EDITABLE non-nil means previous version should be locked."
(let* ((target (vc-workfile-version file))
(previous (if (vc-trunk-p target) "" (vc-branch-part target)))
(config (current-window-configuration))
(done nil))
(vc-do-command nil 0 "rcs" (vc-name file) (concat "-o" target))
;; Check out the most recent remaining version. If it fails, because
;; the whole branch got deleted, do a double-take and check out the
;; version where the branch started.
(while (not done)
(condition-case err
(progn
(vc-do-command nil 0 "co" (vc-name file) "-f"
(concat (if editable "-l" "-u") previous))
(setq done t))
(error (set-buffer "*vc*")
(goto-char (point-min))
(if (search-forward "no side branches present for" nil t)
(progn (setq previous (vc-branch-part previous))
(vc-rcs-set-default-branch file previous)
;; vc-do-command popped up a window with
;; the error message. Get rid of it, by
;; restoring the old window configuration.
(set-window-configuration config))
;; No, it was some other error: re-signal it.
(signal (car err) (cdr err))))))))
(defun vc-rcs-merge (file first-version &optional second-version)
"Merge changes into current working copy of FILE.
The changes are between FIRST-VERSION and SECOND-VERSION."
(vc-do-command nil 1 "rcsmerge" (vc-name file)
"-kk" ; ignore keyword conflicts
(concat "-r" first-version)
(if second-version (concat "-r" second-version))))
(defun vc-rcs-steal-lock (file &optional rev)
"Steal the lock on the current workfile for FILE and revision REV.
Needs RCS 5.6.2 or later for -M."
(vc-do-command nil 0 "rcs" (vc-name file) "-M" (concat "-u" rev))
;; Do a real checkout after stealing the lock, so that we see
;; expanded headers.
(vc-do-command nil 0 "co" (vc-name file) "-f" (concat "-l" rev)))
;;;
;;; History functions
;;;
(defun vc-rcs-print-log (file &optional buffer)
"Get change log associated with FILE."
(vc-do-command buffer 0 "rlog" (vc-name file)))
(defun vc-rcs-diff (file &optional oldvers newvers buffer)
"Get a difference report using RCS between two versions of FILE."
(if (not oldvers) (setq oldvers (vc-workfile-version file)))
(apply 'vc-do-command (or buffer "*vc-diff*") 1 "rcsdiff" file
(append (list "-q"
(concat "-r" oldvers)
(and newvers (concat "-r" newvers)))
(vc-switches 'RCS 'diff))))
(defun vc-rcs-annotate-command (file buffer &optional revision)
"Annotate FILE, inserting the results in BUFFER.
Optional arg REVISION is a revision to annotate from."
(vc-setup-buffer buffer)
;; Aside from the "head revision on the trunk", the instructions for
;; each revision on the trunk are an ordered list of kill and insert
;; commands necessary to go from the chronologically-following
;; revision to this one. That is, associated with revision N are
;; edits that applied to revision N+1 would result in revision N.
;;
;; On a branch, however, (some) things are inverted: the commands
;; listed are those necessary to go from the chronologically-preceding
;; revision to this one. That is, associated with revision N are
;; edits that applied to revision N-1 would result in revision N.
;;
;; So, to get per-line history info, we apply reverse-chronological
;; edits, starting with the head revision on the trunk, all the way
;; back through the initial revision (typically "1.1" or similar),
;; then apply forward-chronological edits -- keeping track of which
;; revision is associated with each inserted line -- until we reach
;; the desired revision for display (which may be either on the trunk
;; or on a branch).
(let* ((tree (with-temp-buffer
(insert-file-contents (vc-rcs-registered file))
(vc-rcs-parse)))
(revisions (cdr (assq 'revisions tree)))
;; The revision N whose instructions we currently are processing.
(cur (cdr (assq 'head (cdr (assq 'headers tree)))))
;; Alist from the parse tree for N.
(meta (cdr (assoc cur revisions)))
;; Point and temporary string, respectively.
p s
;; "Next-branch list". Nil means the desired revision to
;; display lives on the trunk. Non-nil means it lives on a
;; branch, in which case the value is a list of revision pairs
;; (PARENT . CHILD), the first PARENT being on the trunk, that
;; links each series of revisions in the path from the initial
;; revision to the desired revision to display.
nbls
;; "Path-accumulate-predicate plus revision/date/author".
;; Until set, forward-chronological edits are not accumulated.
;; Once set, its value (updated every revision) is used for
;; the text property `:vc-rcs-r/d/a' for inserts during
;; processing of forward-chronological instructions for N.
;; See internal func `r/d/a'.
prda
;; List of forward-chronological instructions, each of the
;; form: (POS . ACTION), where POS is a buffer position. If
;; ACTION is a string, it is inserted, otherwise it is taken as
;; the number of characters to be deleted.
path
;; N+1. When `cur' is "", this is the initial revision.
pre)
(unless revision
(setq revision cur))
(unless (assoc revision revisions)
(error "No such revision: %s" revision))
;; Find which branches (if any) must be included in the edits.
(let ((par revision)
bpt kids)
(while (setq bpt (vc-branch-part par)
par (vc-branch-part bpt))
(setq kids (cdr (assq 'branches (cdr (assoc par revisions)))))
;; A branchpoint may have multiple children. Find the right one.
(while (not (string= bpt (vc-branch-part (car kids))))
(setq kids (cdr kids)))
(push (cons par (car kids)) nbls)))
;; Start with the full text.
(set-buffer buffer)
(insert (cdr (assq 'text meta)))
;; Apply reverse-chronological edits on the trunk, computing and
;; accumulating forward-chronological edits after some point, for
;; later.
(flet ((r/d/a () (vector pre
(cdr (assq 'date meta))
(cdr (assq 'author meta)))))
(while (when (setq pre cur cur (cdr (assq 'next meta)))
(not (string= "" cur)))
(setq
;; Start accumulating the forward-chronological edits when N+1
;; on the trunk is either the desired revision to display, or
;; the appropriate branchpoint for it. Do this before
;; updating `meta' since `r/d/a' uses N+1's `meta' value.
prda (when (or prda (string= (if nbls (caar nbls) revision) pre))
(r/d/a))
meta (cdr (assoc cur revisions)))
;; Edits in the parse tree specify a line number (in the buffer
;; *BEFORE* editing occurs) to start from, but line numbers
;; change as a result of edits. To DTRT, we apply edits in
;; order of descending buffer position so that edits further
;; down in the buffer occur first w/o corrupting specified
;; buffer positions of edits occurring towards the beginning of
;; the buffer. In this way we avoid using markers. A pleasant
;; property of this approach is ability to push instructions
;; onto `path' directly, w/o need to maintain rev boundaries.
(dolist (insn (cdr (assq :insn meta)))
(goto-line (pop insn))
(setq p (point))
(case (pop insn)
(k (setq s (buffer-substring-no-properties
p (progn (forward-line (car insn))
(point))))
(when prda
(push `(,p . ,(propertize s :vc-rcs-r/d/a prda)) path))
(delete-region p (point)))
(i (setq s (car insn))
(when prda
(push `(,p . ,(length s)) path))
(insert s)))))
;; For the initial revision, setting `:vc-rcs-r/d/a' directly is
;; equivalent to pushing an insert instruction (of the entire buffer
;; contents) onto `path' then erasing the buffer, but less wasteful.
(put-text-property (point-min) (point-max) :vc-rcs-r/d/a (r/d/a))
;; Now apply the forward-chronological edits for the trunk.
(dolist (insn path)
(goto-char (pop insn))
(if (stringp insn)
(insert insn)
(delete-char insn)))
;; Now apply the forward-chronological edits (directly from the
;; parse-tree) for the branch(es), if necessary. We re-use vars
;; `pre' and `meta' for the sake of internal func `r/d/a'.
(while nbls
(setq pre (cdr (pop nbls)))
(while (progn
(setq meta (cdr (assoc pre revisions))
prda nil)
(dolist (insn (cdr (assq :insn meta)))
(goto-line (pop insn))
(case (pop insn)
(k (delete-region
(point) (progn (forward-line (car insn))
(point))))
(i (insert (propertize
(car insn)
:vc-rcs-r/d/a
(or prda (setq prda (r/d/a))))))))
(prog1 (not (string= (if nbls (caar nbls) revision) pre))
(setq pre (cdr (assq 'next meta)))))))))
;; Lastly, for each line, insert at bol nicely-formatted history info.
;; We do two passes to collect summary information used to minimize
;; the annotation's usage of screen real-estate: (1) Consider rendered
;; width of revision plus author together as a unit; and (2) Omit
;; author entirely if all authors are the same as the user.
(let ((ht (make-hash-table :test 'eq))
(me (user-login-name))
(maxw 0)
(all-me t)
rda w a)
(goto-char (point-max))
(while (not (bobp))
(forward-line -1)
(setq rda (get-text-property (point) :vc-rcs-r/d/a))
(unless (gethash rda ht)
(setq a (aref rda 2)
all-me (and all-me (string= a me)))
(puthash rda (setq w (+ (length (aref rda 0))
(length a)))
ht)
(setq maxw (max w maxw))))
(let ((padding (make-string maxw 32)))
(flet ((pad (w) (substring-no-properties padding w))
(render (rda &rest ls)
(propertize
(apply 'concat
(format-time-string "%Y-%m-%d" (aref rda 1))
" "
(aref rda 0)
ls)
:vc-annotate-prefix t
:vc-rcs-r/d/a rda)))
(maphash
(if all-me
(lambda (rda w)
(puthash rda (render rda (pad w) ": ") ht))
(lambda (rda w)
(puthash rda (render rda " " (pad w) " " (aref rda 2) ": ") ht)))
ht)))
(while (not (eobp))
(insert (gethash (get-text-property (point) :vc-rcs-r/d/a) ht))
(forward-line 1))))
(defun vc-rcs-annotate-current-time ()
"Return the current time, based at midnight of the current day, and
encoded as fractional days."
(vc-annotate-convert-time
(apply 'encode-time 0 0 0 (nthcdr 3 (decode-time (current-time))))))
(defun vc-rcs-annotate-time ()
"Return the time of the next annotation (as fraction of days)
systime, or nil if there is none. Also, reposition point."
(unless (eobp)
(prog1 (vc-annotate-convert-time
(aref (get-text-property (point) :vc-rcs-r/d/a) 1))
(goto-char (next-single-property-change (point) :vc-annotate-prefix)))))
(defun vc-rcs-annotate-extract-revision-at-line ()
(aref (get-text-property (point) :vc-rcs-r/d/a) 0))
;;;
;;; Snapshot system
;;;
(defun vc-rcs-assign-name (file name)
"Assign to FILE's latest version a given NAME."
(vc-do-command nil 0 "rcs" (vc-name file) (concat "-n" name ":")))
;;;
;;; Miscellaneous
;;;
(defun vc-rcs-check-headers ()
"Check if the current file has any headers in it."
(save-excursion
(goto-char (point-min))
(re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
\\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
(defun vc-rcs-clear-headers ()
"Implementation of vc-clear-headers for RCS."
(let ((case-fold-search nil))
(goto-char (point-min))
(while (re-search-forward
(concat "\\$\\(Author\\|Date\\|Header\\|Id\\|Locker\\|Name\\|"
"RCSfile\\|Revision\\|Source\\|State\\): [^$\n]+\\$")
nil t)
(replace-match "$\\1$"))))
(defun vc-rcs-rename-file (old new)
;; Just move the master file (using vc-rcs-master-templates).
(vc-rename-master (vc-name old) new vc-rcs-master-templates))
;;;
;;; Internal functions
;;;
(defun vc-rcs-workfile-is-newer (file)
"Return non-nil if FILE is newer than its RCS master.
This likely means that FILE has been changed with respect
to its master version."
(let ((file-time (nth 5 (file-attributes file)))
(master-time (nth 5 (file-attributes (vc-name file)))))
(or (> (nth 0 file-time) (nth 0 master-time))
(and (= (nth 0 file-time) (nth 0 master-time))
(> (nth 1 file-time) (nth 1 master-time))))))
(defun vc-rcs-find-most-recent-rev (branch)
"Find most recent revision on BRANCH."
(goto-char (point-min))
(let ((latest-rev -1) value)
(while (re-search-forward (concat "^\\(" (regexp-quote branch)
"\\.\\([0-9]+\\)\\)\ndate[ \t]+[0-9.]+;")
nil t)
(let ((rev (string-to-number (match-string 2))))
(when (< latest-rev rev)
(setq latest-rev rev)
(setq value (match-string 1)))))
(or value
(vc-branch-part branch))))
(defun vc-rcs-fetch-master-state (file &optional workfile-version)
"Compute the master file's idea of the state of FILE.
If a WORKFILE-VERSION is given, compute the state of that version,
otherwise determine the workfile version based on the master file.
This function sets the properties `vc-workfile-version' and
`vc-checkout-model' to their correct values, based on the master
file."
(with-temp-buffer
(if (or (not (vc-insert-file (vc-name file) "^[0-9]"))
(progn (goto-char (point-min))
(not (looking-at "^head[ \t\n]+[^;]+;$"))))
(error "File %s is not an RCS master file" (vc-name file)))
(let ((workfile-is-latest nil)
(default-branch (vc-parse-buffer "^branch[ \t\n]+\\([^;]*\\);" 1)))
(vc-file-setprop file 'vc-rcs-default-branch default-branch)
(unless workfile-version
;; Workfile version not known yet. Determine that first. It
;; is either the head of the trunk, the head of the default
;; branch, or the "default branch" itself, if that is a full
;; revision number.
(cond
;; no default branch
((or (not default-branch) (string= "" default-branch))
(setq workfile-version
(vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
(setq workfile-is-latest t))
;; default branch is actually a revision
((string-match "^[0-9]+\\.[0-9]+\\(\\.[0-9]+\\.[0-9]+\\)*$"
default-branch)
(setq workfile-version default-branch))
;; else, search for the head of the default branch
(t (vc-insert-file (vc-name file) "^desc")
(setq workfile-version
(vc-rcs-find-most-recent-rev default-branch))
(setq workfile-is-latest t)))
(vc-file-setprop file 'vc-workfile-version workfile-version))
;; Check strict locking
(goto-char (point-min))
(vc-file-setprop file 'vc-checkout-model
(if (re-search-forward ";[ \t\n]*strict;" nil t)
'locking 'implicit))
;; Compute state of workfile version
(goto-char (point-min))
(let ((locking-user
(vc-parse-buffer (concat "^locks[ \t\n]+[^;]*[ \t\n]+\\([^:]+\\):"
(regexp-quote workfile-version)
"[^0-9.]")
1)))
(cond
;; not locked
((not locking-user)
(if (or workfile-is-latest
(vc-rcs-latest-on-branch-p file workfile-version))
;; workfile version is latest on branch
'up-to-date
;; workfile version is not latest on branch
'needs-patch))
;; locked by the calling user
((and (stringp locking-user)
(string= locking-user (vc-user-login-name file)))
(if (or (eq (vc-checkout-model file) 'locking)
workfile-is-latest
(vc-rcs-latest-on-branch-p file workfile-version))
'edited
;; Locking is not used for the file, but the owner does
;; have a lock, and there is a higher version on the current
;; branch. Not sure if this can occur, and if it is right
;; to use `needs-merge' in this case.
'needs-merge))
;; locked by somebody else
((stringp locking-user)
locking-user)
(t
(error "Error getting state of RCS file")))))))
(defun vc-rcs-consult-headers (file)
"Search for RCS headers in FILE, and set properties accordingly.
Returns: nil if no headers were found
'rev if a workfile revision was found
'rev-and-lock if revision and lock info was found"
(cond
((not (get-file-buffer file)) nil)
((let (status version locking-user)
(save-excursion
(set-buffer (get-file-buffer file))
(goto-char (point-min))
(cond
;; search for $Id or $Header
;; -------------------------
;; The `\ 's below avoid an RCS 5.7 bug when checking in this file.
((or (and (search-forward "$Id\ : " nil t)
(looking-at "[^ ]+ \\([0-9.]+\\) "))
(and (progn (goto-char (point-min))
(search-forward "$Header\ : " nil t))
(looking-at "[^ ]+ \\([0-9.]+\\) ")))
(goto-char (match-end 0))
;; if found, store the revision number ...
(setq version (match-string-no-properties 1))
;; ... and check for the locking state
(cond
((looking-at
(concat "[0-9]+[/-][01][0-9][/-][0-3][0-9] " ; date
"[0-2][0-9]:[0-5][0-9]+:[0-6][0-9]+\\([+-][0-9:]+\\)? " ; time
"[^ ]+ [^ ]+ ")) ; author & state
(goto-char (match-end 0)) ; [0-6] in regexp handles leap seconds
(cond
;; unlocked revision
((looking-at "\\$")
(setq locking-user 'none)
(setq status 'rev-and-lock))
;; revision is locked by some user
((looking-at "\\([^ ]+\\) \\$")
(setq locking-user (match-string-no-properties 1))
(setq status 'rev-and-lock))
;; everything else: false
(nil)))
;; unexpected information in
;; keyword string --> quit
(nil)))
;; search for $Revision
;; --------------------
((re-search-forward (concat "\\$"
"Revision: \\([0-9.]+\\) \\$")
nil t)
;; if found, store the revision number ...
(setq version (match-string-no-properties 1))
;; and see if there's any lock information
(goto-char (point-min))
(if (re-search-forward (concat "\\$" "Locker:") nil t)
(cond ((looking-at " \\([^ ]+\\) \\$")
(setq locking-user (match-string-no-properties 1))
(setq status 'rev-and-lock))
((looking-at " *\\$")
(setq locking-user 'none)
(setq status 'rev-and-lock))
(t
(setq locking-user 'none)
(setq status 'rev-and-lock)))
(setq status 'rev)))
;; else: nothing found
;; -------------------
(t nil)))
(if status (vc-file-setprop file 'vc-workfile-version version))
(and (eq status 'rev-and-lock)
(vc-file-setprop file 'vc-state
(cond
((eq locking-user 'none) 'up-to-date)
((string= locking-user (vc-user-login-name file))
'edited)
(t locking-user)))
;; If the file has headers, we don't want to query the
;; master file, because that would eliminate all the
;; performance gain the headers brought us. We therefore
;; use a heuristic now to find out whether locking is used
;; for this file. If we trust the file permissions, and the
;; file is not locked, then if the file is read-only we
;; assume that locking is used for the file, otherwise
;; locking is not used.
(not (vc-mistrust-permissions file))
(vc-up-to-date-p file)
(if (string-match ".r-..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'locking)
(vc-file-setprop file 'vc-checkout-model 'implicit)))
status))))
(defun vc-release-greater-or-equal (r1 r2)
"Compare release numbers, represented as strings.
Release components are assumed cardinal numbers, not decimal fractions
\(5.10 is a higher release than 5.9\). Omitted fields are considered
lower \(5.6.7 is earlier than 5.6.7.1\). Comparison runs till the end
of the string is found, or a non-numeric component shows up \(5.6.7 is
earlier than \"5.6.7 beta\", which is probably not what you want in
some cases\). This code is suitable for existing RCS release numbers.
CVS releases are handled reasonably, too \(1.3 < 1.4* < 1.5\)."
(let (v1 v2 i1 i2)
(catch 'done
(or (and (string-match "^\\.?\\([0-9]+\\)" r1)
(setq i1 (match-end 0))
(setq v1 (string-to-number (match-string 1 r1)))
(or (and (string-match "^\\.?\\([0-9]+\\)" r2)
(setq i2 (match-end 0))
(setq v2 (string-to-number (match-string 1 r2)))
(if (> v1 v2) (throw 'done t)
(if (< v1 v2) (throw 'done nil)
(throw 'done
(vc-release-greater-or-equal
(substring r1 i1)
(substring r2 i2)))))))
(throw 'done t)))
(or (and (string-match "^\\.?\\([0-9]+\\)" r2)
(throw 'done nil))
(throw 'done t)))))
(defun vc-rcs-release-p (release)
"Return t if we have RELEASE or better."
(let ((installation (vc-rcs-system-release)))
(if (and installation
(not (eq installation 'unknown)))
(vc-release-greater-or-equal installation release))))
(defun vc-rcs-system-release ()
"Return the RCS release installed on this system, as a string.
Return symbol UNKNOWN if the release cannot be deducted. The user can
override this using variable `vc-rcs-release'.
If the user has not set variable `vc-rcs-release' and it is nil,
variable `vc-rcs-release' is set to the returned value."
(or vc-rcs-release
(setq vc-rcs-release
(or (and (zerop (vc-do-command nil nil "rcs" nil "-V"))
(with-current-buffer (get-buffer "*vc*")
(vc-parse-buffer "^RCS version \\([0-9.]+ *.*\\)" 1)))
'unknown))))
(defun vc-rcs-set-non-strict-locking (file)
(vc-do-command nil 0 "rcs" file "-U")
(vc-file-setprop file 'vc-checkout-model 'implicit)
(set-file-modes file (logior (file-modes file) 128)))
(defun vc-rcs-set-default-branch (file branch)
(vc-do-command nil 0 "rcs" (vc-name file) (concat "-b" branch))
(vc-file-setprop file 'vc-rcs-default-branch branch))
(defun vc-rcs-parse (&optional buffer)
"Parse current buffer, presumed to be in RCS-style masterfile format.
Optional arg BUFFER specifies another buffer to parse. Return an alist
of two elements, w/ keys `headers' and `revisions' and values in turn
sub-alists. For `headers', the values unless otherwise specified are
strings and the keys are:
desc -- description
head -- latest revision
branch -- the branch the \"head revision\" lies on;
absent if the head revision lies on the trunk
access -- ???
symbols -- sub-alist of (SYMBOL . REVISION) elements
locks -- if file is checked out, something like \"ttn:1.7\"
strict -- t if \"strict locking\" is in effect, otherwise nil
comment -- may be absent; typically something like \"# \" or \"; \"
expand -- may be absent; ???
For `revisions', the car is REVISION (string), the cdr a sub-alist,
with string values (unless otherwise specified) and keys:
date -- a time value (like that returned by `encode-time'); as a
special case, a year value less than 100 is augmented by 1900
author -- username
state -- typically \"Exp\" or \"Rel\"
branches -- list of revisions that begin branches from this revision
next -- on the trunk: the chronologically-preceding revision, or \"\";
on a branch: the chronologically-following revision, or \"\"
log -- change log entry
text -- for the head revision on the trunk, the body of the file;
other revisions have `:insn' instead
:insn -- for non-head revisions, a list of parsed instructions
in one of two forms, in both cases START meaning \"first
go to line START\":
- `(START k COUNT)' -- kill COUNT lines
- `(START i TEXT)' -- insert TEXT (a string)
The list is in descending order by START.
The `:insn' key is a keyword to distinguish it as a vc-rcs.el extension."
(setq buffer (get-buffer (or buffer (current-buffer))))
(set-buffer buffer)
;; An RCS masterfile can be viewed as containing four regular (for the
;; most part) sections: (a) the "headers", (b) the "rev headers", (c)
;; the "description" and (d) the "rev bodies", in that order. In the
;; returned alist (see docstring), elements from (b) and (d) are
;; combined pairwise to form the "revisions", while those from (a) and
;; (c) are simply combined to form the "headers".
;;
;; Loosely speaking, each section contains a series of alternating
;; "tags" and "printed representations". In the (b) and (d), many
;; such series can appear, and a revision number on a line by itself
;; precedes the series of tags and printed representations associated
;; with it.
;;
;; In (a) and (b), the printed representations (with the exception of
;; the `comment' tag in the headers) terminate with a semicolon, which
;; is NOT part of the "value" finally associated with the tag. All
;; other printed representations are in "@@-format"; there is an "@",
;; the middle part (to be translated into the value), another "@" and
;; a newline. Each "@@" in the middle part indicates the position of
;; a single "@" (and consequently the requirement of an additional
;; initial step when translating to the value).
;;
;; Parser state includes vars that collect parts of the return value...
(let ((desc nil) (headers nil) (revs nil)
;; ... as well as vars that support a single-pass, tag-assisted,
;; minimal-data-copying scan. Basically -- skirting around the
;; grouping by revision required in (b) and (d) -- we repeatedly
;; and context-sensitively read a tag (that MUST be present),
;; determine the bounds of the printed representation, translate
;; it into a value, and push the tag plus value onto one of the
;; collection vars. Finally, we return the parse tree
;; incorporating the values of the collection vars (see "rv").
;;
;; A symbol or string to keep track of context (for error messages).
context
;; A symbol, the current tag.
tok
;; Region (begin and end buffer positions) of the printed
;; representation for the current tag.
b e
;; A list of buffer positions where "@@" can be found within the
;; printed representation region. For each location, we push two
;; elements onto the list, 1+ and 2+ the location, respectively,
;; with the 2+ appearing at the head. In this way, the expression
;; `(,e ,@@-holes ,b)
;; describes regions that can be concatenated (in reverse order)
;; to "de-@@-format" the printed representation as the first step
;; to translating it into some value. See internal func `gather'.
@-holes)
(flet ((sw () (skip-chars-forward " \t\n")) ; i.e., `[:space:]'
(at (tag) (save-excursion (eq tag (read buffer))))
(to-eol () (buffer-substring-no-properties
(point) (progn (forward-line 1)
(1- (point)))))
(to-semi () (setq b (point)
e (progn (search-forward ";")
(1- (point)))))
(to-one@ () (setq @-holes nil
b (progn (search-forward "@") (point))
e (progn (while (and (search-forward "@")
(= ?@ (char-after))
(progn
(push (point) @-holes)
(forward-char 1)
(push (point) @-holes))))
(1- (point)))))
(tok+val (set-b+e name &optional proc)
(unless (eq name (setq tok (read buffer)))
(error "Missing `%s' while parsing %s" name context))
(sw)
(funcall set-b+e)
(cons tok (if proc
(funcall proc)
(buffer-substring-no-properties b e))))
(k-semi (name &optional proc) (tok+val 'to-semi name proc))
(gather () (let ((pairs `(,e ,@@-holes ,b))
acc)
(while pairs
(push (buffer-substring-no-properties
(cadr pairs) (car pairs))
acc)
(setq pairs (cddr pairs)))
(apply 'concat acc)))
(k-one@ (name &optional later) (tok+val 'to-one@ name
(if later
(lambda () t)
'gather))))
(save-excursion
(goto-char (point-min))
;; headers
(setq context 'headers)
(flet ((hpush (name &optional proc)
(push (k-semi name proc) headers)))
(hpush 'head)
(when (at 'branch)
(hpush 'branch))
(hpush 'access)
(hpush 'symbols
(lambda ()
(mapcar (lambda (together)
(let ((two (split-string together ":")))
(setcar two (intern (car two)))
(setcdr two (cadr two))
two))
(split-string
(buffer-substring-no-properties b e)))))
(hpush 'locks))
(push `(strict . ,(when (at 'strict)
(search-forward ";")
t))
headers)
(when (at 'comment)
(push (k-one@ 'comment) headers)
(search-forward ";"))
(when (at 'expand)
(push (k-one@ 'expand) headers)
(search-forward ";"))
(setq headers (nreverse headers))
;; rev headers
(sw) (setq context 'rev-headers)
(while (looking-at "[0-9]")
(push `(,(to-eol)
,(k-semi 'date
(lambda ()
(let ((ls (mapcar 'string-to-number
(split-string
(buffer-substring-no-properties
b e)
"\\."))))
;; Hack the year -- verified to be the
;; same algorithm used in RCS 5.7.
(when (< (car ls) 100)
(setcar ls (+ 1900 (car ls))))
(apply 'encode-time (nreverse ls)))))
,@(mapcar 'k-semi '(author state))
,(k-semi 'branches
(lambda ()
(split-string
(buffer-substring-no-properties b e))))
,(k-semi 'next))
revs)
(sw))
(setq revs (nreverse revs))
;; desc
(sw) (setq context 'desc
desc (k-one@ 'desc))
;; rev bodies
(let (acc
;; Element of `revs' that initially holds only header info.
;; "Pairwise combination" occurs when we add body info.
rev
;; Components of the editing commands (aside from the actual
;; text) that comprise the `text' printed representations
;; (not including the "head" revision).
cmd start act
;; Ascending (reversed) `@-holes' which the internal func
;; `incg' pops to effect incremental gathering.
asc
;; Function to extract text (for the `a' command), either
;; `incg' or `buffer-substring-no-properties'. (This is
;; for speed; strictly speaking, it is sufficient to use
;; only the former since it behaves identically to the
;; latter in the absense of "@@".)
sub)
(flet ((incg (beg end) (let ((b beg) (e end) @-holes)
(while (and asc (< (car asc) e))
(push (pop asc) @-holes))
;; Self-deprecate when work is done.
;; Folding many dimensions into one.
;; Thanks B.Mandelbrot, for complex sum.
;; O beauteous math! --the Unvexed Bum
(unless asc
(setq sub 'buffer-substring-no-properties))
(gather))))
(while (and (sw)
(not (eobp))
(setq context (to-eol)
rev (or (assoc context revs)
(error "Rev `%s' has body but no head"
context))))
(push (k-one@ 'log) (cdr rev))
;; For rev body `text' tags, delay translation slightly...
(push (k-one@ 'text t) (cdr rev))
;; ... until we decide which tag and value is appropriate to
;; collect. For the "head" revision, compute the value of the
;; `text' printed representation by simple `gather'. For all
;; other revisions, replace the `text' tag+value with `:insn'
;; plus value, always scanning in-place.
(if (string= context (cdr (assq 'head headers)))
(setcdr (cadr rev) (gather))
(if @-holes
(setq asc (nreverse @-holes)
sub 'incg)
(setq sub 'buffer-substring-no-properties))
(goto-char b)
(setq acc nil)
(while (< (point) e)
(forward-char 1)
(setq cmd (char-before)
start (read (current-buffer))
act (read (current-buffer)))
(forward-char 1)
(push (case cmd
(?d
;; `d' means "delete lines".
;; For Emacs spirit, we use `k' for "kill".
`(,start k ,act))
(?a
;; `a' means "append after this line" but
;; internally we normalize it so that START
;; specifies the actual line for insert, thus
;; requiring less hair in the realization algs.
;; For Emacs spirit, we use `i' for "insert".
`(,(1+ start) i
,(funcall sub (point) (progn (forward-line act)
(point)))))
(t (error "Bad command `%c' in `text' for rev `%s'"
cmd context)))
acc))
(goto-char (1+ e))
(setcar (cdr rev) (cons :insn acc)))))))
;; rv
`((headers ,desc ,@headers)
(revisions ,@revs)))))
(provide 'vc-rcs)
;; arch-tag: 759b4916-5b0d-431d-b647-b185b8c652cf
;;; vc-rcs.el ends here
|
