1. Nic Ferrier
  2. emacs

Source

emacs / lisp / vc-bzr.el

  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
;;; vc-bzr.el --- VC backend for the bzr revision control system

;; Copyright (C) 2006, 2007, 2008, 2009  Free Software Foundation, Inc.

;; Author: Dave Love <fx@gnu.org>
;; 	   Riccardo Murri <riccardo.murri@gmail.com>
;; Keywords: tools
;; Created: Sept 2006
;; Version: 2008-01-04 (Bzr revno 25)
;; URL: http://launchpad.net/vc-bzr

;; 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:

;; See <URL:http://bazaar-vcs.org/> concerning bzr.  See
;; <URL:http://launchpad.net/vc-bzr> for alternate development
;; branches of `vc-bzr'.

;; Load this library to register bzr support in VC.

;; Known bugs
;; ==========

;; When edititing a symlink and *both* the symlink and its target
;; are bzr-versioned, `vc-bzr` presently runs `bzr status` on the
;; symlink, thereby not detecting whether the actual contents
;; (that is, the target contents) are changed.
;; See https://bugs.launchpad.net/vc-bzr/+bug/116607

;; For an up-to-date list of bugs, please see:
;;   https://bugs.launchpad.net/vc-bzr/+bugs

;;; Properties of the backend

(defun vc-bzr-revision-granularity () 'repository)
(defun vc-bzr-checkout-model (files) 'implicit)

;;; Code:

(eval-when-compile
  (require 'cl)
  (require 'vc)  ;; for vc-exec-after
  (require 'vc-dir))

;; Clear up the cache to force vc-call to check again and discover
;; new functions when we reload this file.
(put 'Bzr 'vc-functions nil)

(defgroup vc-bzr nil
  "VC bzr backend."
  :version "22.2"
  :group 'vc)

(defcustom vc-bzr-program "bzr"
  "Name of the bzr command (excluding any arguments)."
  :group 'vc-bzr
  :type 'string)

(defcustom vc-bzr-diff-switches nil
  "String or list of strings specifying switches for bzr diff under VC.
If nil, use the value of `vc-diff-switches'.  If t, use no switches."
  :type '(choice (const :tag "Unspecified" nil)
                 (const :tag "None" t)
                 (string :tag "Argument String")
                 (repeat :tag "Argument List" :value ("") string))
  :group 'vc-bzr)

(defcustom vc-bzr-log-switches nil
  "String or list of strings specifying switches for bzr log under VC."
  :type '(choice (const :tag "None" nil)
                 (string :tag "Argument String")
                 (repeat :tag "Argument List" :value ("") string))
  :group 'vc-bzr)

;; since v0.9, bzr supports removing the progress indicators
;; by setting environment variable BZR_PROGRESS_BAR to "none".
(defun vc-bzr-command (bzr-command buffer okstatus file-or-list &rest args)
  "Wrapper round `vc-do-command' using `vc-bzr-program' as COMMAND.
Invoke the bzr command adding `BZR_PROGRESS_BAR=none' and
`LC_MESSAGES=C' to the environment."
  (let ((process-environment
         (list* "BZR_PROGRESS_BAR=none" ; Suppress progress output (bzr >=0.9)
                "LC_MESSAGES=C"         ; Force English output
                process-environment)))
    (apply 'vc-do-command (or buffer "*vc*") okstatus vc-bzr-program
           file-or-list bzr-command args)))


;;;###autoload
(defconst vc-bzr-admin-dirname ".bzr"
  "Name of the directory containing Bzr repository status files.")
;;;###autoload
(defconst vc-bzr-admin-checkout-format-file
  (concat vc-bzr-admin-dirname "/checkout/format"))
(defconst vc-bzr-admin-dirstate
  (concat vc-bzr-admin-dirname "/checkout/dirstate"))
(defconst vc-bzr-admin-branch-format-file
  (concat vc-bzr-admin-dirname "/branch/format"))
(defconst vc-bzr-admin-revhistory
  (concat vc-bzr-admin-dirname "/branch/revision-history"))
(defconst vc-bzr-admin-lastrev
  (concat vc-bzr-admin-dirname "/branch/last-revision"))

;;;###autoload (defun vc-bzr-registered (file)
;;;###autoload   (if (vc-find-root file vc-bzr-admin-checkout-format-file)
;;;###autoload       (progn
;;;###autoload         (load "vc-bzr")
;;;###autoload         (vc-bzr-registered file))))

(defun vc-bzr-root (file)
  "Return the root directory of the bzr repository containing FILE."
  ;; Cache technique copied from vc-arch.el.
  (or (vc-file-getprop file 'bzr-root)
      (let ((root (vc-find-root file vc-bzr-admin-checkout-format-file)))
	(when root (vc-file-setprop file 'bzr-root root)))))

(require 'sha1)                         ;For sha1-program

(defun vc-bzr-sha1 (file)
  (with-temp-buffer
    (set-buffer-multibyte nil)
    (let ((prog sha1-program)
          (args nil))
      (when (consp prog)
	(setq args (cdr prog))
        (setq prog (car prog)))
      (apply 'process-file prog (file-relative-name file) t nil args)
      (buffer-substring (point-min) (+ (point-min) 40)))))

(defun vc-bzr-state-heuristic (file)
  "Like `vc-bzr-state' but hopefully without running Bzr."
  ;; `bzr status' was excrutiatingly slow with large histories and
  ;; pending merges, so try to avoid using it until they fix their
  ;; performance problems.
  ;; This function tries first to parse Bzr internal file
  ;; `checkout/dirstate', but it may fail if Bzr internal file format
  ;; has changed.  As a safeguard, the `checkout/dirstate' file is
  ;; only parsed if it contains the string `#bazaar dirstate flat
  ;; format 3' in the first line.
  ;; If the `checkout/dirstate' file cannot be parsed, fall back to
  ;; running `vc-bzr-state'."
  (lexical-let ((root (vc-bzr-root file)))
    (when root    ; Short cut.
      ;; This looks at internal files.  May break if they change
      ;; their format.
      (lexical-let ((dirstate (expand-file-name vc-bzr-admin-dirstate root)))
        (condition-case nil
            (with-temp-buffer
              (insert-file-contents dirstate)
              (goto-char (point-min))
              (if (not (looking-at "#bazaar dirstate flat format 3"))
                  (vc-bzr-state file)   ; Some other unknown format?
                (let* ((relfile (file-relative-name file root))
                       (reldir (file-name-directory relfile)))
                  (if (re-search-forward
                       (concat "^\0"
                               (if reldir (regexp-quote
                                           (directory-file-name reldir)))
                               "\0"
                               (regexp-quote (file-name-nondirectory relfile))
                               "\0"
                               "[^\0]*\0"     ;id?
                               "\\([^\0]*\\)\0" ;"a/f/d", a=removed?
                               "[^\0]*\0" ;sha1 (empty if conflicted)?
                               "\\([^\0]*\\)\0" ;size?
                               "[^\0]*\0"       ;"y/n", executable?
                               "[^\0]*\0"       ;?
                               "\\([^\0]*\\)\0" ;"a/f/d" a=added?
                               "\\([^\0]*\\)\0" ;sha1 again?
                               "[^\0]*\0"       ;size again?
                               "[^\0]*\0" ;"y/n", executable again?
                               "[^\0]*\0" ;last revid?
                               ;; There are more fields when merges are pending.
                               )
                       nil t)
                      ;; Apparently the second sha1 is the one we want: when
                      ;; there's a conflict, the first sha1 is absent (and the
                      ;; first size seems to correspond to the file with
                      ;; conflict markers).
                      (cond
                       ((eq (char-after (match-beginning 1)) ?a) 'removed)
                       ((eq (char-after (match-beginning 3)) ?a) 'added)
                       ((and (eq (string-to-number (match-string 2))
                                 (nth 7 (file-attributes file)))
                             (equal (match-string 4)
                                    (vc-bzr-sha1 file)))
                        'up-to-date)
                       (t 'edited))
                    'unregistered))))
          ;; Either the dirstate file can't be read, or the sha1
          ;; executable is missing, or ...
          ;; In either case, recent versions of Bzr aren't that slow
          ;; any more.
          (error (vc-bzr-state file)))))))


(defun vc-bzr-registered (file)
  "Return non-nil if FILE is registered with bzr."
  (let ((state (vc-bzr-state-heuristic file)))
    (not (memq state '(nil unregistered ignored)))))

(defconst vc-bzr-state-words
  "added\\|ignored\\|kind changed\\|modified\\|removed\\|renamed\\|unknown"
  "Regexp matching file status words as reported in `bzr' output.")

(defun vc-bzr-file-name-relative (filename)
  "Return file name FILENAME stripped of the initial Bzr repository path."
  (lexical-let*
      ((filename* (expand-file-name filename))
       (rootdir (vc-bzr-root filename*)))
    (when rootdir
         (file-relative-name filename* rootdir))))

(defun vc-bzr-status (file)
  "Return FILE status according to Bzr.
Return value is a cons (STATUS . WARNING), where WARNING is a
string or nil, and STATUS is one of the symbols: `added',
`ignored', `kindchanged', `modified', `removed', `renamed', `unknown',
which directly correspond to `bzr status' output, or 'unchanged
for files whose copy in the working tree is identical to the one
in the branch repository, or nil for files that are not
registered with Bzr.

If any error occurred in running `bzr status', then return nil."
  (with-temp-buffer
    (let ((ret (condition-case nil
                   (vc-bzr-command "status" t 0 file)
                 (file-error nil)))     ; vc-bzr-program not found.
          (status 'unchanged))
          ;; the only secure status indication in `bzr status' output
          ;; is a couple of lines following the pattern::
          ;;   | <status>:
          ;;   |   <file name>
          ;; if the file is up-to-date, we get no status report from `bzr',
          ;; so if the regexp search for the above pattern fails, we consider
          ;; the file to be up-to-date.
          (goto-char (point-min))
          (when (re-search-forward
                 ;; bzr prints paths relative to the repository root.
                 (concat "^\\(" vc-bzr-state-words "\\):[ \t\n]+"
                         (regexp-quote (vc-bzr-file-name-relative file))
                         ;; Bzr appends a '/' to directory names and
                         ;; '*' to executable files
                         (if (file-directory-p file) "/?" "\\*?")
                         "[ \t\n]*$")
                 nil t)
            (lexical-let ((statusword (match-string 1)))
              ;; Erase the status text that matched.
              (delete-region (match-beginning 0) (match-end 0))
              (setq status
                    (intern (replace-regexp-in-string " " "" statusword)))))
          (when status
            (goto-char (point-min))
            (skip-chars-forward " \n\t") ;Throw away spaces.
            (cons status
                  ;; "bzr" will output warnings and informational messages to
                  ;; stderr; due to Emacs' `vc-do-command' (and, it seems,
                  ;; `start-process' itself) limitations, we cannot catch stderr
                  ;; and stdout into different buffers.  So, if there's anything
                  ;; left in the buffer after removing the above status
                  ;; keywords, let us just presume that any other message from
                  ;; "bzr" is a user warning, and display it.
                  (unless (eobp) (buffer-substring (point) (point-max))))))))

(defun vc-bzr-state (file)
  (lexical-let ((result (vc-bzr-status file)))
    (when (consp result)
      (when (cdr result)
	(message "Warnings in `bzr' output: %s" (cdr result)))
      (cdr (assq (car result)
                 '((added . added)
                   (kindchanged . edited)
                   (renamed . edited)
                   (modified . edited)
                   (removed . removed)
                   (ignored . ignored)
                   (unknown . unregistered)
                   (unchanged . up-to-date)))))))

(defun vc-bzr-resolve-when-done ()
  "Call \"bzr resolve\" if the conflict markers have been removed."
  (save-excursion
    (goto-char (point-min))
    (unless (re-search-forward "^<<<<<<< " nil t)
      (vc-bzr-command "resolve" nil 0 buffer-file-name)
      ;; Remove the hook so that it is not called multiple times.
      (remove-hook 'after-save-hook 'vc-bzr-resolve-when-done t))))

(defun vc-bzr-find-file-hook ()
  (when (and buffer-file-name
             ;; FIXME: We should check that "bzr status" says "conflict".
             (file-exists-p (concat buffer-file-name ".BASE"))
             (file-exists-p (concat buffer-file-name ".OTHER"))
             (file-exists-p (concat buffer-file-name ".THIS"))
             ;; If "bzr status" says there's a conflict but there are no
             ;; conflict markers, it's not clear what we should do.
             (save-excursion
               (goto-char (point-min))
               (re-search-forward "^<<<<<<< " nil t)))
    ;; TODO: the merge algorithm used in `bzr merge' is nicely configurable,
    ;; but the one in `bzr pull' isn't, so it would be good to provide an
    ;; elisp function to remerge from the .BASE/OTHER/THIS files.
    (smerge-start-session)
    (add-hook 'after-save-hook 'vc-bzr-resolve-when-done nil t)
    (message "There are unresolved conflicts in this file")))

(defun vc-bzr-workfile-unchanged-p (file)
  (eq 'unchanged (car (vc-bzr-status file))))

(defun vc-bzr-working-revision (file)
  ;; Together with the code in vc-state-heuristic, this makes it possible
  ;; to get the initial VC state of a Bzr file even if Bzr is not installed.
  (lexical-let*
      ((rootdir (vc-bzr-root file))
       (branch-format-file (expand-file-name vc-bzr-admin-branch-format-file
                                             rootdir))
       (revhistory-file (expand-file-name vc-bzr-admin-revhistory rootdir))
       (lastrev-file (expand-file-name vc-bzr-admin-lastrev rootdir)))
    ;; This looks at internal files to avoid forking a bzr process.
    ;; May break if they change their format.
    (if (and (file-exists-p branch-format-file)
	     ;; For lightweight checkouts (obtained with bzr checkout --lightweight)
	     ;; the branch-format-file does not contain the revision
	     ;; information, we need to look up the branch-format-file
	     ;; in the place where the lightweight checkout comes
	     ;; from.  We only do that if it's a local file.
	     (let ((location-fname (expand-file-name
				    (concat vc-bzr-admin-dirname
					    "/branch/location") rootdir)))
	       ;; The existence of this file is how we distinguish
	       ;; lightweight checkouts.
	       (if (file-exists-p location-fname)
		   (with-temp-buffer
		     (insert-file-contents location-fname)
		     (when (re-search-forward "file://\(.+\)" nil t)
		       (setq branch-format-file (match-string 1))
		       (file-exists-p branch-format-file)))
		 t)))
        (with-temp-buffer
          (insert-file-contents branch-format-file)
          (goto-char (point-min))
          (cond
           ((or
             (looking-at "Bazaar-NG branch, format 0.0.4")
             (looking-at "Bazaar-NG branch format 5"))
            ;; count lines in .bzr/branch/revision-history
            (insert-file-contents revhistory-file)
            (number-to-string (count-lines (line-end-position) (point-max))))
           ((or
	     (looking-at "Bazaar Branch Format 6 (bzr 0.15)")
	     (looking-at "Bazaar Branch Format 7 (needs bzr 1.6)"))
            ;; revno is the first number in .bzr/branch/last-revision
            (insert-file-contents lastrev-file)
            (when (re-search-forward "[0-9]+" nil t)
	      (buffer-substring (match-beginning 0) (match-end 0))))))
      ;; fallback to calling "bzr revno"
      (lexical-let*
          ((result (vc-bzr-command-discarding-stderr
                    vc-bzr-program "revno" (file-relative-name file)))
           (exitcode (car result))
           (output (cdr result)))
        (cond
         ((eq exitcode 0) (substring output 0 -1))
         (t nil))))))

(defun vc-bzr-create-repo ()
  "Create a new Bzr repository."
  (vc-bzr-command "init" nil 0 nil))

(defun vc-bzr-init-revision (&optional file)
  "Always return nil, as Bzr cannot register explicit versions."
  nil)

(defun vc-bzr-previous-revision (file rev)
  (if (string-match "\\`[0-9]+\\'" rev)
      (number-to-string (1- (string-to-number rev)))
    (concat "before:" rev)))

(defun vc-bzr-next-revision (file rev)
  (if (string-match "\\`[0-9]+\\'" rev)
      (number-to-string (1+ (string-to-number rev)))
    (error "Don't know how to compute the next revision of %s" rev)))

(defun vc-bzr-register (files &optional rev comment)
  "Register FILE under bzr.
Signal an error unless REV is nil.
COMMENT is ignored."
  (if rev (error "Can't register explicit revision with bzr"))
  (vc-bzr-command "add" nil 0 files))

;; Could run `bzr status' in the directory and see if it succeeds, but
;; that's relatively expensive.
(defalias 'vc-bzr-responsible-p 'vc-bzr-root
  "Return non-nil if FILE is (potentially) controlled by bzr.
The criterion is that there is a `.bzr' directory in the same
or a superior directory.")

(defun vc-bzr-could-register (file)
  "Return non-nil if FILE could be registered under bzr."
  (and (vc-bzr-responsible-p file)      ; shortcut
       (condition-case ()
           (with-temp-buffer
             (vc-bzr-command "add" t 0 file "--dry-run")
             ;; The command succeeds with no output if file is
             ;; registered (in bzr 0.8).
             (goto-char (point-min))
             (looking-at "added "))
         (error))))

(defun vc-bzr-unregister (file)
  "Unregister FILE from bzr."
  (vc-bzr-command "remove" nil 0 file "--keep"))

(defun vc-bzr-checkin (files rev comment)
  "Check FILE in to bzr with log message COMMENT.
REV non-nil gets an error."
  (if rev (error "Can't check in a specific revision with bzr"))
  (vc-bzr-command "commit" nil 0 files "-m" comment))

(defun vc-bzr-find-revision (file rev buffer)
  "Fetch revision REV of file FILE and put it into BUFFER."
    (with-current-buffer buffer
      (if (and rev (stringp rev) (not (string= rev "")))
          (vc-bzr-command "cat" t 0 file "-r" rev)
        (vc-bzr-command "cat" t 0 file))))

(defun vc-bzr-checkout (file &optional editable rev)
  (if rev (error "Operation not supported")
    ;; Else, there's nothing to do.
    nil))

(defun vc-bzr-revert (file &optional contents-done)
  (unless contents-done
    (with-temp-buffer (vc-bzr-command "revert" t 0 file))))

(defvar log-view-message-re)
(defvar log-view-file-re)
(defvar log-view-font-lock-keywords)
(defvar log-view-current-tag-function)
(defvar log-view-per-file-logs)

(define-derived-mode vc-bzr-log-view-mode log-view-mode "Bzr-Log-View"
  (remove-hook 'log-view-mode-hook 'vc-bzr-log-view-mode) ;Deactivate the hack.
  (require 'add-log)
  (set (make-local-variable 'log-view-per-file-logs) nil)
  (set (make-local-variable 'log-view-file-re) "^Working file:[ \t]+\\(.+\\)")
  (set (make-local-variable 'log-view-message-re)
       "^ *\\(?:revno: \\([0-9.]+\\)\\|merged: .+\\)")
  (set (make-local-variable 'log-view-font-lock-keywords)
       ;; log-view-font-lock-keywords is careful to use the buffer-local
       ;; value of log-view-message-re only since Emacs-23.
       (append `((,log-view-message-re . 'log-view-message-face))
               ;; log-view-font-lock-keywords
               '(("^ *committer: \
\\([^<(]+?\\)[  ]*[(<]\\([[:alnum:]_.+-]+@[[:alnum:]_.-]+\\)[>)]"
                  (1 'change-log-name)
                  (2 'change-log-email))
                 ("^ *timestamp: \\(.*\\)" (1 'change-log-date-face))))))

(defun vc-bzr-print-log (files &optional buffer) ; get buffer arg in Emacs 22
  "Get bzr change log for FILES into specified BUFFER."
  ;; `vc-do-command' creates the buffer, but we need it before running
  ;; the command.
  (vc-setup-buffer buffer)
  ;; If the buffer exists from a previous invocation it might be
  ;; read-only.
  ;; FIXME: `vc-bzr-command' runs `bzr log' with `LC_MESSAGES=C', so
  ;; the log display may not what the user wants - but I see no other
  ;; way of getting the above regexps working.
  (dolist (file files)
    (vc-exec-after
     `(let ((inhibit-read-only t))
        (with-current-buffer buffer
          ;; Insert the file name so that log-view.el can find it.
          (insert "Working file: " ',file "\n")) ;; Like RCS/CVS.
        (apply 'vc-bzr-command "log" ',buffer 'async ',file
               ',(if (stringp vc-bzr-log-switches)
                     (list vc-bzr-log-switches)
                   vc-bzr-log-switches))))))

(defun vc-bzr-show-log-entry (revision)
  "Find entry for patch name REVISION in bzr change log buffer."
  (goto-char (point-min))
  (when revision
    (let (case-fold-search)
      (if (re-search-forward
	   ;; "revno:" can appear either at the beginning of a line,
	   ;; or indented.
	   (concat "^[ ]*-+\n[ ]*revno: "
		   ;; The revision can contain ".", quote it so that it
		   ;; does not interfere with regexp matching.
		   (regexp-quote revision) "$") nil t)
	  (beginning-of-line 0)
	(goto-char (point-min))))))

(defun vc-bzr-diff (files &optional rev1 rev2 buffer)
  "VC bzr backend for diff."
  ;; `bzr diff' exits with code 1 if diff is non-empty.
  (apply #'vc-bzr-command "diff" (or buffer "*vc-diff*") 'async files
         "--diff-options" (mapconcat 'identity
                                     (vc-switches 'bzr 'diff)
				     " ")
         ;; This `when' is just an optimization because bzr-1.2 is *much*
         ;; faster when the revision argument is not given.
         (when (or rev1 rev2)
           (list "-r" (format "%s..%s"
                              (or rev1 "revno:-1")
                              (or rev2 ""))))))


;; FIXME: vc-{next,previous}-revision need fixing in vc.el to deal with
;; straight integer revisions.

(defun vc-bzr-delete-file (file)
  "Delete FILE and delete it in the bzr repository."
  (condition-case ()
      (delete-file file)
    (file-error nil))
  (vc-bzr-command "remove" nil 0 file))

(defun vc-bzr-rename-file (old new)
  "Rename file from OLD to NEW using `bzr mv'."
  (vc-bzr-command "mv" nil 0 new old))

(defvar vc-bzr-annotation-table nil
  "Internal use.")
(make-variable-buffer-local 'vc-bzr-annotation-table)

(defun vc-bzr-annotate-command (file buffer &optional revision)
  "Prepare BUFFER for `vc-annotate' on FILE.
Each line is tagged with the revision number, which has a `help-echo'
property containing author and date information."
  (apply #'vc-bzr-command "annotate" buffer 0 file "--long" "--all"
         (if revision (list "-r" revision)))
  (with-current-buffer buffer
    ;; Store the tags for the annotated source lines in a hash table
    ;; to allow saving space by sharing the text properties.
    (setq vc-bzr-annotation-table (make-hash-table :test 'equal))
    (goto-char (point-min))
    (while (re-search-forward "^\\( *[0-9.]+ *\\) \\([^\n ]+\\) +\\([0-9]\\{8\\}\\) |"
                              nil t)
      (let* ((rev (match-string 1))
             (author (match-string 2))
             (date (match-string 3))
             (key (match-string 0))
             (tag (gethash key vc-bzr-annotation-table)))
        (unless tag
          (setq tag (propertize rev 'help-echo (concat "Author: " author
                                                       ", date: " date)
                                'mouse-face 'highlight))
          (puthash key tag vc-bzr-annotation-table))
        (replace-match "")
        (insert tag " |")))))

(declare-function vc-annotate-convert-time "vc-annotate" (time))

(defun vc-bzr-annotate-time ()
  (when (re-search-forward "^ *[0-9.]+ +|" nil t)
    (let ((prop (get-text-property (line-beginning-position) 'help-echo)))
      (string-match "[0-9]+\\'" prop)
      (let ((str (match-string-no-properties 0 prop)))
      (vc-annotate-convert-time
       (encode-time 0 0 0
                      (string-to-number (substring str 6 8))
                      (string-to-number (substring str 4 6))
                      (string-to-number (substring str 0 4))))))))

(defun vc-bzr-annotate-extract-revision-at-line ()
  "Return revision for current line of annoation buffer, or nil.
Return nil if current line isn't annotated."
  (save-excursion
    (beginning-of-line)
    (if (looking-at " *\\([0-9.]+\\) *| ")
        (match-string-no-properties 1))))

(defun vc-bzr-command-discarding-stderr (command &rest args)
  "Execute shell command COMMAND (with ARGS); return its output and exitcode.
Return value is a cons (EXITCODE . OUTPUT), where EXITCODE is
the (numerical) exit code of the process, and OUTPUT is a string
containing whatever the process sent to its standard output
stream.  Standard error output is discarded."
  (with-temp-buffer
    (cons
     (apply #'process-file command nil (list (current-buffer) nil) nil args)
     (buffer-substring (point-min) (point-max)))))

(defun vc-bzr-prettify-state-info (file)
  "Bzr-specific version of `vc-prettify-state-info'."
  (if (eq 'edited (vc-state file))
        (concat "(" (symbol-name (or (vc-file-getprop file 'vc-bzr-state)
                                     'edited)) ")")
    ;; else fall back to default vc.el representation
    (vc-default-prettify-state-info 'Bzr file)))

(defstruct (vc-bzr-extra-fileinfo
            (:copier nil)
            (:constructor vc-bzr-create-extra-fileinfo (extra-name))
            (:conc-name vc-bzr-extra-fileinfo->))
  extra-name)         ;; original name for rename targets, new name for

(defun vc-bzr-dir-printer (info)
  "Pretty-printer for the vc-dir-fileinfo structure."
  (let ((extra (vc-dir-fileinfo->extra info)))
    (vc-default-dir-printer 'Bzr info)
    (when extra
      (insert (propertize
	       (format "   (renamed from %s)"
		       (vc-bzr-extra-fileinfo->extra-name extra))
	       'face 'font-lock-comment-face)))))

;; FIXME: this needs testing, it's probably incomplete.
(defun vc-bzr-after-dir-status (update-function)
  (let ((status-str nil)
	(translation '(("+N " . added)
		       ("-D " . removed)
		       (" M " . edited) ;; file text modified
		       ("  *" . edited) ;; execute bit changed
		       (" M*" . edited) ;; text modified + execute bit changed
		       ;; FIXME: what about ignored files?
		       (" D " . missing)
                       ;; For conflicts, should we list the .THIS/.BASE/.OTHER?
		       ("C  " . conflict)
		       ("?  " . unregistered)
		       ("?  " . unregistered)
		       ;; No such state, but we need to distinguish this case.
		       ("R  " . renamed)
		       ;; For a non existent file FOO, the output is:
		       ;; bzr: ERROR: Path(s) do not exist: FOO
		       ("bzr" . not-found)
		       ;; If the tree is not up to date, bzr will print this warning:
		       ;; working tree is out of date, run 'bzr update'
		       ;; ignore it.
		       ;; FIXME: maybe this warning can be put in the vc-dir header...
		       ("wor" . not-found)
                       ;; Ignore "P " and "P." for pending patches.
                       ))
	(translated nil)
	(result nil))
      (goto-char (point-min))
      (while (not (eobp))
	(setq status-str
	      (buffer-substring-no-properties (point) (+ (point) 3)))
	(setq translated (cdr (assoc status-str translation)))
	(cond
	 ((eq translated 'conflict)
	  ;; For conflicts the file appears twice in the listing: once
	  ;; with the M flag and once with the C flag, so take care
	  ;; not to add it twice to `result'.  Ugly.
	  (let* ((file
		  (buffer-substring-no-properties
		   ;;For files with conflicts the format is:
		   ;;C   Text conflict in FILENAME
		   ;; Bah.
		   (+ (point) 21) (line-end-position)))
		 (entry (assoc file result)))
	    (when entry
	      (setf (nth 1 entry) 'conflict))))
	 ((eq translated 'renamed)
	  (re-search-forward "R   \\(.*\\) => \\(.*\\)$" (line-end-position) t)
	  (let ((new-name (match-string 2))
		(old-name (match-string 1)))
	    (push (list new-name 'edited
		      (vc-bzr-create-extra-fileinfo old-name)) result)))
	 ;; do nothing for non existent files
	 ((eq translated 'not-found))
	 (t
	  (push (list (buffer-substring-no-properties
		       (+ (point) 4)
		       (line-end-position))
		      translated) result)))
	(forward-line))
      (funcall update-function result)))

(defun vc-bzr-dir-status (dir update-function)
  "Return a list of conses (file . state) for DIR."
  (vc-bzr-command "status" (current-buffer) 'async dir "-v" "-S")
  (vc-exec-after
   `(vc-bzr-after-dir-status (quote ,update-function))))

(defun vc-bzr-dir-status-files (dir files default-state update-function)
  "Return a list of conses (file . state) for DIR."
  (apply 'vc-bzr-command "status" (current-buffer) 'async dir "-v" "-S" files)
  (vc-exec-after
   `(vc-bzr-after-dir-status (quote ,update-function))))

(defun vc-bzr-dir-extra-headers (dir)
  (let*
      ((str (with-temp-buffer
	      (vc-bzr-command "info" t 0 dir)
	      (buffer-string)))
       (light-checkout
	(when (string-match ".+light checkout root: \\(.+\\)$" str)
	  (match-string 1 str)))
       (light-checkout-branch
	(when light-checkout
	  (when (string-match ".+checkout of branch: \\(.+\\)$" str)
	    (match-string 1 str)))))
    (concat
     (propertize "Parent branch      : " 'face 'font-lock-type-face)
     (propertize
      (if (string-match "parent branch: \\(.+\\)$" str)
 	  (match-string 1 str)
 	"None")
       'face 'font-lock-variable-name-face)
     "\n"
      (when light-checkout
	(concat
	 (propertize "Light checkout root: " 'face 'font-lock-type-face)
	 (propertize light-checkout 'face 'font-lock-variable-name-face)
	 "\n"))
      (when light-checkout-branch
	(concat
	 (propertize "Checkout of branch : " 'face 'font-lock-type-face)
	 (propertize light-checkout-branch 'face 'font-lock-variable-name-face)
	 "\n")))))

;;; Revision completion

(defun vc-bzr-revision-completion-table (files)
  (lexical-let ((files files))
    ;; What about using `files'?!?  --Stef
    (lambda (string pred action)
      (cond
       ((string-match "\\`\\(ancestor\\|branch\\|\\(revno:\\)?[-0-9]+:\\):"
                      string)
        (completion-table-with-context (substring string 0 (match-end 0))
                                       ;; FIXME: only allow directories.
                                       ;; FIXME: don't allow envvars.
                                       'read-file-name-internal
                                       (substring string (match-end 0))
                                       ;; Dropping `pred'.   Maybe we should
                                       ;; just stash it in
                                       ;; `read-file-name-predicate'?
                                       nil
                                       action))
       ((string-match "\\`\\(before\\):" string)
        (completion-table-with-context (substring string 0 (match-end 0))
                                       (vc-bzr-revision-completion-table files)
                                       (substring string (match-end 0))
                                       pred
                                       action))
       ((string-match "\\`\\(tag\\):" string)
        (let ((prefix (substring string 0 (match-end 0)))
              (tag (substring string (match-end 0)))
              (table nil))
          (with-temp-buffer
            ;; "bzr-1.2 tags" is much faster with --show-ids.
            (process-file vc-bzr-program nil '(t) nil "tags" "--show-ids")
            ;; The output is ambiguous, unless we assume that revids do not
            ;; contain spaces.
            (goto-char (point-min))
            (while (re-search-forward "^\\(.*[^ \n]\\) +[^ \n]*$" nil t)
              (push (match-string-no-properties 1) table)))
          (completion-table-with-context prefix table tag pred action)))

       ((string-match "\\`\\(revid\\):" string)
        ;; FIXME: How can I get a list of revision ids?
        )
       ((eq (car-safe action) 'boundaries)
        (list* 'boundaries
               (string-match "[^:]*\\'" string)
               (string-match ":" (cdr action))))
       (t
        ;; Could use completion-table-with-terminator, except that it
        ;; currently doesn't work right w.r.t pcm and doesn't give
        ;; the *Completions* output we want.
        (complete-with-action action '("revno:" "revid:" "last:" "before:"
                                       "tag:" "date:" "ancestor:" "branch:"
                                       "submit:")
                              string pred))))))

(eval-after-load "vc"
  '(add-to-list 'vc-directory-exclusion-list vc-bzr-admin-dirname t))

(provide 'vc-bzr)
;; arch-tag: 8101bad8-4e92-4e7d-85ae-d8e08b4e7c06
;;; vc-bzr.el ends here