lisp/vc-svn.el

   1 ;;; vc-svn.el --- non-resident support for Subversion version-control
   2
   3 ;; Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   4
   5 ;; Author:      FSF (see vc.el for full credits)
   6 ;; Maintainer:  Stefan Monnier <monnier@gnu.org>
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23 ;; Boston, MA 02110-1301, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; This is preliminary support for Subversion (http://subversion.tigris.org/).
  28 ;; It started as `sed s/cvs/svn/ vc.cvs.el' (from version 1.56)
  29 ;; and hasn't been completely fixed since.
  30
  31 ;; Sync'd with Subversion's vc-svn.el as of revision 5801.
  32
  33 ;;; Bugs:
  34
  35 ;; - VC-dired is (really) slow.
  36
  37 ;;; Code:
  38
  39 (eval-when-compile
  40   (require 'vc))
  41
  42 ;;;
  43 ;;; Customization options
  44 ;;;
  45
  46 (defcustom vc-svn-global-switches nil
  47   "*Global switches to pass to any SVN command."
  48   :type '(choice (const :tag "None" nil)
  49                  (string :tag "Argument String")
  50                  (repeat :tag "Argument List"
  51                          :value ("")
  52                          string))
  53   :version "22.1"
  54   :group 'vc)
  55
  56 (defcustom vc-svn-register-switches nil
  57   "*Extra switches for registering a file into SVN.
  58 A string or list of strings passed to the checkin program by
  59 \\[vc-register]."
  60   :type '(choice (const :tag "None" nil)
  61                  (string :tag "Argument String")
  62                  (repeat :tag "Argument List"
  63                          :value ("")
  64                          string))
  65   :version "22.1"
  66   :group 'vc)
  67
  68 (defcustom vc-svn-diff-switches
  69   t                        ;`svn' doesn't support common args like -c or -b.
  70   "String or list of strings specifying extra switches for svn diff under VC.
  71 If nil, use the value of `vc-diff-switches'.
  72 If you want to force an empty list of arguments, use t."
  73   :type '(choice (const :tag "Unspecified" nil)
  74                  (const :tag "None" t)
  75                  (string :tag "Argument String")
  76                  (repeat :tag "Argument List"
  77                          :value ("")
  78                          string))
  79   :version "22.1"
  80   :group 'vc)
  81
  82 (defcustom vc-svn-header (or (cdr (assoc 'SVN vc-header-alist)) '("\$Id\$"))
  83   "*Header keywords to be inserted by `vc-insert-headers'."
  84   :version "22.1"
  85   :type '(repeat string)
  86   :group 'vc)
  87
  88 (defconst vc-svn-use-edit nil
  89   ;; Subversion does not provide this feature (yet).
  90   "*Non-nil means to use `svn edit' to \"check out\" a file.
  91 This is only meaningful if you don't use the implicit checkout model
  92 \(i.e. if you have $SVNREAD set)."
  93   ;; :type 'boolean
  94   ;; :version "22.1"
  95   ;; :group 'vc
  96   )
  97
  98 ;;;
  99 ;;; State-querying functions
 100 ;;;
 101
 102 ;;;###autoload (defun vc-svn-registered (f)
 103 ;;;###autoload   (when (file-readable-p (expand-file-name
 104 ;;;###autoload                    ".svn/entries" (file-name-directory f)))
 105 ;;;###autoload       (load "vc-svn")
 106 ;;;###autoload       (vc-svn-registered f)))
 107
 108 ;;;###autoload
 109 (add-to-list 'completion-ignored-extensions ".svn/")
 110
 111 (defun vc-svn-registered (file)
 112   "Check if FILE is SVN registered."
 113   (when (file-readable-p (expand-file-name ".svn/entries"
 114                                            (file-name-directory file)))
 115     (with-temp-buffer
 116       (cd (file-name-directory file))
 117       (let ((status
 118              (condition-case nil
 119                  ;; Ignore all errors.
 120                  (vc-svn-command t t file "status" "-v")
 121                ;; Some problem happened.  E.g. We can't find an `svn'
 122                ;; executable.  We used to only catch `file-error' but when
 123                ;; the process is run on a remote host via Tramp, the error
 124                ;; is only reported via the exit status which is turned into
 125                ;; an `error' by vc-do-command.
 126                (error nil))))
 127         (when (eq 0 status)
 128           (vc-svn-parse-status file))))))
 129
 130 (defun vc-svn-state (file &optional localp)
 131   "SVN-specific version of `vc-state'."
 132   (setq localp (or localp (vc-stay-local-p file)))
 133   (with-temp-buffer
 134     (cd (file-name-directory file))
 135     (vc-svn-command t 0 file "status" (if localp "-v" "-u"))
 136     (vc-svn-parse-status file)))
 137
 138 (defun vc-svn-state-heuristic (file)
 139   "SVN-specific state heuristic."
 140   (vc-svn-state file 'local))
 141
 142 (defun vc-svn-dir-state (dir &optional localp)
 143   "Find the SVN state of all files in DIR."
 144   (setq localp (or localp (vc-stay-local-p dir)))
 145   (let ((default-directory dir))
 146     ;; Don't specify DIR in this command, the default-directory is
 147     ;; enough.  Otherwise it might fail with remote repositories.
 148     (with-temp-buffer
 149       (vc-svn-command t 0 nil "status" (if localp "-v" "-u"))
 150       (vc-svn-parse-status))))
 151
 152 (defun vc-svn-workfile-version (file)
 153   "SVN-specific version of `vc-workfile-version'."
 154   ;; There is no need to consult RCS headers under SVN, because we
 155   ;; get the workfile version for free when we recognize that a file
 156   ;; is registered in SVN.
 157   (vc-svn-registered file)
 158   (vc-file-getprop file 'vc-workfile-version))
 159
 160 (defun vc-svn-checkout-model (file)
 161   "SVN-specific version of `vc-checkout-model'."
 162   ;; It looks like Subversion has no equivalent of CVSREAD.
 163   'implicit)
 164
 165 ;; vc-svn-mode-line-string doesn't exist because the default implementation
 166 ;; works just fine.
 167
 168 (defun vc-svn-dired-state-info (file)
 169   "SVN-specific version of `vc-dired-state-info'."
 170   (let ((svn-state (vc-state file)))
 171     (cond ((eq svn-state 'edited)
 172            (if (equal (vc-workfile-version file) "0")
 173                "(added)" "(modified)"))
 174           ((eq svn-state 'needs-patch) "(patch)")
 175           ((eq svn-state 'needs-merge) "(merge)"))))
 176
 177 (defun vc-svn-previous-version (file rev)
 178   (let ((newrev (1- (string-to-number rev))))
 179     (when (< 0 newrev)
 180       (number-to-string newrev))))
 181
 182 (defun vc-svn-next-version (file rev)
 183   (let ((newrev (1+ (string-to-number rev))))
 184     ;; The "workfile version" is an uneasy conceptual fit under Subversion;
 185     ;; we use it as the upper bound until a better idea comes along.  If the
 186     ;; workfile version W coincides with the tree's latest revision R, then
 187     ;; this check prevents a "no such revision: R+1" error.  Otherwise, it
 188     ;; inhibits showing of W+1 through R, which could be considered anywhere
 189     ;; from gracious to impolite.
 190     (unless (< (string-to-number (vc-file-getprop file 'vc-workfile-version))
 191                newrev)
 192       (number-to-string newrev))))
 193
 194
 195 ;;;
 196 ;;; State-changing functions
 197 ;;;
 198
 199 (defun vc-svn-register (file &optional rev comment)
 200   "Register FILE into the SVN version-control system.
 201 COMMENT can be used to provide an initial description of FILE.
 202
 203 `vc-register-switches' and `vc-svn-register-switches' are passed to
 204 the SVN command (in that order)."
 205   (apply 'vc-svn-command nil 0 file "add" (vc-switches 'SVN 'register)))
 206
 207 (defun vc-svn-responsible-p (file)
 208   "Return non-nil if SVN thinks it is responsible for FILE."
 209   (file-directory-p (expand-file-name ".svn"
 210                                       (if (file-directory-p file)
 211                                           file
 212                                         (file-name-directory file)))))
 213
 214 (defalias 'vc-svn-could-register 'vc-svn-responsible-p
 215   "Return non-nil if FILE could be registered in SVN.
 216 This is only possible if SVN is responsible for FILE's directory.")
 217
 218 (defun vc-svn-checkin (file rev comment)
 219   "SVN-specific version of `vc-backend-checkin'."
 220   (let ((status (apply
 221                  'vc-svn-command nil 1 file "ci"
 222                  (nconc (list "-m" comment) (vc-switches 'SVN 'checkin)))))
 223     (set-buffer "*vc*")
 224     (goto-char (point-min))
 225     (unless (equal status 0)
 226       ;; Check checkin problem.
 227       (cond
 228        ((search-forward "Transaction is out of date" nil t)
 229         (vc-file-setprop file 'vc-state 'needs-merge)
 230         (error (substitute-command-keys
 231                 (concat "Up-to-date check failed: "
 232                         "type \\[vc-next-action] to merge in changes"))))
 233        (t
 234         (pop-to-buffer (current-buffer))
 235         (goto-char (point-min))
 236         (shrink-window-if-larger-than-buffer)
 237         (error "Check-in failed"))))
 238     ;; Update file properties
 239     ;; (vc-file-setprop
 240     ;;  file 'vc-workfile-version
 241     ;;  (vc-parse-buffer "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" 2))
 242     ))
 243
 244 (defun vc-svn-find-version (file rev buffer)
 245   (apply 'vc-svn-command
 246          buffer 0 file
 247          "cat"
 248          (and rev (not (string= rev ""))
 249               (concat "-r" rev))
 250          (vc-switches 'SVN 'checkout)))
 251
 252 (defun vc-svn-checkout (file &optional editable rev)
 253   (message "Checking out %s..." file)
 254   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 255     (vc-call update file editable rev (vc-switches 'SVN 'checkout)))
 256   (vc-mode-line file)
 257   (message "Checking out %s...done" file))
 258
 259 (defun vc-svn-update (file editable rev switches)
 260   (if (and (file-exists-p file) (not rev))
 261       ;; If no revision was specified, just make the file writable
 262       ;; if necessary (using `svn-edit' if requested).
 263       (and editable (not (eq (vc-svn-checkout-model file) 'implicit))
 264            (if vc-svn-use-edit
 265                (vc-svn-command nil 0 file "edit")
 266              (set-file-modes file (logior (file-modes file) 128))
 267              (if (equal file buffer-file-name) (toggle-read-only -1))))
 268     ;; Check out a particular version (or recreate the file).
 269     (vc-file-setprop file 'vc-workfile-version nil)
 270     (apply 'vc-svn-command nil 0 file
 271            "update"
 272            ;; default for verbose checkout: clear the sticky tag so
 273            ;; that the actual update will get the head of the trunk
 274            (cond
 275             ((null rev) "-rBASE")
 276             ((or (eq rev t) (equal rev "")) nil)
 277             (t (concat "-r" rev)))
 278            switches)))
 279
 280 (defun vc-svn-delete-file (file)
 281   (vc-svn-command nil 0 file "remove"))
 282
 283 (defun vc-svn-rename-file (old new)
 284   (vc-svn-command nil 0 new "move" (file-relative-name old)))
 285
 286 (defun vc-svn-revert (file &optional contents-done)
 287   "Revert FILE to the version it was based on."
 288   (unless contents-done
 289     (vc-svn-command nil 0 file "revert"))
 290   (unless (eq (vc-checkout-model file) 'implicit)
 291     (if vc-svn-use-edit
 292         (vc-svn-command nil 0 file "unedit")
 293       ;; Make the file read-only by switching off all w-bits
 294       (set-file-modes file (logand (file-modes file) 3950)))))
 295
 296 (defun vc-svn-merge (file first-version &optional second-version)
 297   "Merge changes into current working copy of FILE.
 298 The changes are between FIRST-VERSION and SECOND-VERSION."
 299   (vc-svn-command nil 0 file
 300                  "merge"
 301                  "-r" (if second-version
 302                         (concat first-version ":" second-version)
 303                       first-version))
 304   (vc-file-setprop file 'vc-state 'edited)
 305   (with-current-buffer (get-buffer "*vc*")
 306     (goto-char (point-min))
 307     (if (looking-at "C  ")
 308         1                               ; signal conflict
 309       0)))                              ; signal success
 310
 311 (defun vc-svn-merge-news (file)
 312   "Merge in any new changes made to FILE."
 313   (message "Merging changes into %s..." file)
 314   ;; (vc-file-setprop file 'vc-workfile-version nil)
 315   (vc-file-setprop file 'vc-checkout-time 0)
 316   (vc-svn-command nil 0 file "update")
 317   ;; Analyze the merge result reported by SVN, and set
 318   ;; file properties accordingly.
 319   (with-current-buffer (get-buffer "*vc*")
 320     (goto-char (point-min))
 321     ;; get new workfile version
 322     (if (re-search-forward
 323          "^\\(Updated to\\|At\\) revision \\([0-9]+\\)" nil t)
 324         (vc-file-setprop file 'vc-workfile-version (match-string 2))
 325       (vc-file-setprop file 'vc-workfile-version nil))
 326     ;; get file status
 327     (goto-char (point-min))
 328     (prog1
 329         (if (looking-at "At revision")
 330             0 ;; there were no news; indicate success
 331           (if (re-search-forward
 332                (concat "^\\([CGDU]  \\)?"
 333                        (regexp-quote (file-name-nondirectory file)))
 334                nil t)
 335               (cond
 336                ;; Merge successful, we are in sync with repository now
 337                ((string= (match-string 1) "U  ")
 338                 (vc-file-setprop file 'vc-state 'up-to-date)
 339                 (vc-file-setprop file 'vc-checkout-time
 340                                  (nth 5 (file-attributes file)))
 341                 0);; indicate success to the caller
 342                ;; Merge successful, but our own changes are still in the file
 343                ((string= (match-string 1) "G  ")
 344                 (vc-file-setprop file 'vc-state 'edited)
 345                 0);; indicate success to the caller
 346                ;; Conflicts detected!
 347                (t
 348                 (vc-file-setprop file 'vc-state 'edited)
 349                 1);; signal the error to the caller
 350                )
 351             (pop-to-buffer "*vc*")
 352             (error "Couldn't analyze svn update result")))
 353       (message "Merging changes into %s...done" file))))
 354
 355
 356 ;;;
 357 ;;; History functions
 358 ;;;
 359
 360 (defun vc-svn-print-log (file &optional buffer)
 361   "Get change log associated with FILE."
 362   (save-current-buffer
 363     (vc-setup-buffer buffer)
 364     (let ((inhibit-read-only t))
 365       (goto-char (point-min))
 366       ;; Add a line to tell log-view-mode what file this is.
 367       (insert "Working file: " (file-relative-name file) "\n"))
 368     (vc-svn-command
 369      buffer
 370      (if (and (vc-stay-local-p file) (fboundp 'start-process)) 'async 0)
 371      file "log"
 372      ;; By default Subversion only shows the log upto the working version,
 373      ;; whereas we also want the log of the subsequent commits.  At least
 374      ;; that's what the vc-cvs.el code does.
 375      "-rHEAD:0")))
 376
 377 (defun vc-svn-diff (file &optional oldvers newvers buffer)
 378   "Get a difference report using SVN between two versions of FILE."
 379   (unless buffer (setq buffer "*vc-diff*"))
 380   (if (and oldvers (equal oldvers (vc-workfile-version file)))
 381       ;; Use nil rather than the current revision because svn handles it
 382       ;; better (i.e. locally).
 383       (setq oldvers nil))
 384   (if (string= (vc-workfile-version file) "0")
 385       ;; This file is added but not yet committed; there is no master file.
 386       (if (or oldvers newvers)
 387           (error "No revisions of %s exist" file)
 388         ;; We regard this as "changed".
 389         ;; Diff it against /dev/null.
 390         ;; Note: this is NOT a "svn diff".
 391         (apply 'vc-do-command buffer
 392                1 "diff" file
 393                (append (vc-switches nil 'diff) '("/dev/null")))
 394         ;; Even if it's empty, it's locally modified.
 395         1)
 396     (let* ((switches
 397             (if vc-svn-diff-switches
 398                 (vc-switches 'SVN 'diff)
 399               (list "-x" (mapconcat 'identity (vc-switches nil 'diff) " "))))
 400            (async (and (not vc-disable-async-diff)
 401                        (vc-stay-local-p file)
 402                        (or oldvers newvers) ; Svn diffs those locally.
 403                        (fboundp 'start-process))))
 404       (apply 'vc-svn-command buffer
 405              (if async 'async 0)
 406              file "diff"
 407              (append
 408               switches
 409               (when oldvers
 410                 (list "-r" (if newvers (concat oldvers ":" newvers)
 411                              oldvers)))))
 412       (if async 1                     ; async diff => pessimistic assumption
 413         ;; For some reason `svn diff' does not return a useful
 414         ;; status w.r.t whether the diff was empty or not.
 415         (buffer-size (get-buffer buffer))))))
 416
 417 (defun vc-svn-diff-tree (dir &optional rev1 rev2)
 418   "Diff all files at and below DIR."
 419   (vc-svn-diff (file-name-as-directory dir) rev1 rev2))
 420
 421 ;;;
 422 ;;; Snapshot system
 423 ;;;
 424
 425 (defun vc-svn-create-snapshot (dir name branchp)
 426   "Assign to DIR's current version a given NAME.
 427 If BRANCHP is non-nil, the name is created as a branch (and the current
 428 workspace is immediately moved to that new branch).
 429 NAME is assumed to be a URL."
 430   (vc-svn-command nil 0 dir "copy" name)
 431   (when branchp (vc-svn-retrieve-snapshot dir name nil)))
 432
 433 (defun vc-svn-retrieve-snapshot (dir name update)
 434   "Retrieve a snapshot at and below DIR.
 435 NAME is the name of the snapshot; if it is empty, do a `svn update'.
 436 If UPDATE is non-nil, then update (resynch) any affected buffers.
 437 NAME is assumed to be a URL."
 438   (vc-svn-command nil 0 dir "switch" name)
 439   ;; FIXME: parse the output and obey `update'.
 440   )
 441
 442 ;;;
 443 ;;; Miscellaneous
 444 ;;;
 445
 446 ;; Subversion makes backups for us, so don't bother.
 447 ;; (defalias 'vc-svn-make-version-backups-p 'vc-stay-local-p
 448 ;;   "Return non-nil if version backups should be made for FILE.")
 449
 450 (defun vc-svn-check-headers ()
 451   "Check if the current file has any headers in it."
 452   (save-excursion
 453     (goto-char (point-min))
 454     (re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
 455 \\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
 456
 457
 458 ;;;
 459 ;;; Internal functions
 460 ;;;
 461
 462 (defun vc-svn-command (buffer okstatus file &rest flags)
 463   "A wrapper around `vc-do-command' for use in vc-svn.el.
 464 The difference to vc-do-command is that this function always invokes `svn',
 465 and that it passes `vc-svn-global-switches' to it before FLAGS."
 466   (apply 'vc-do-command buffer okstatus "svn" file
 467          (if (stringp vc-svn-global-switches)
 468              (cons vc-svn-global-switches flags)
 469            (append vc-svn-global-switches
 470                    flags))))
 471
 472 (defun vc-svn-repository-hostname (dirname)
 473   (with-temp-buffer
 474     (let ((coding-system-for-read
 475            (or file-name-coding-system
 476                default-file-name-coding-system)))
 477       (vc-insert-file (expand-file-name ".svn/entries" dirname)))
 478     (goto-char (point-min))
 479     (when (re-search-forward
 480            ;; Old `svn' used name="svn:dir", newer use just name="".
 481            (concat "name=\"\\(?:svn:this_dir\\)?\"[\n\t ]*"
 482                    "\\(?:[-a-z]+=\"[^\"]*\"[\n\t ]*\\)*?"
 483                    "url=\"\\([^\"]+\\)\"") nil t)
 484       ;; This is not a hostname but a URL.  This may actually be considered
 485       ;; as a feature since it allows vc-svn-stay-local to specify different
 486       ;; behavior for different modules on the same server.
 487       (match-string 1))))
 488
 489 (defun vc-svn-parse-status (&optional filename)
 490   "Parse output of \"svn status\" command in the current buffer.
 491 Set file properties accordingly.  Unless FILENAME is non-nil, parse only
 492 information about FILENAME and return its status."
 493   (let (file status)
 494     (goto-char (point-min))
 495     (while (re-search-forward
 496             "^[ ADMCI?!~][ MC][ L][ +][ S]..\\([ *]\\) +\\([-0-9]+\\) +\\([0-9?]+\\) +\\([^ ]+\\) +" nil t)
 497       (setq file (expand-file-name
 498                   (buffer-substring (point) (line-end-position))))
 499       (setq status (char-after (line-beginning-position)))
 500       (unless (eq status ??)
 501         ;; `vc-BACKEND-registered' must not set vc-backend,
 502         ;; which is instead set in vc-registered.
 503         (unless filename (vc-file-setprop file 'vc-backend 'SVN))
 504         ;; Use the last-modified revision, so that searching in vc-print-log
 505         ;; output works.
 506         (vc-file-setprop file 'vc-workfile-version (match-string 3))
 507         (vc-file-setprop
 508          file 'vc-state
 509          (cond
 510           ((eq status ?\ )
 511            (if (eq (char-after (match-beginning 1)) ?*)
 512                'needs-patch
 513              (vc-file-setprop file 'vc-checkout-time
 514                               (nth 5 (file-attributes file)))
 515              'up-to-date))
 516           ((eq status ?A)
 517            ;; If the file was actually copied, (match-string 2) is "-".
 518            (vc-file-setprop file 'vc-workfile-version "0")
 519            (vc-file-setprop file 'vc-checkout-time 0)
 520            'edited)
 521           ((memq status '(?M ?C))
 522            (if (eq (char-after (match-beginning 1)) ?*)
 523                'needs-merge
 524              'edited))
 525           (t 'edited)))))
 526     (if filename (vc-file-getprop filename 'vc-state))))
 527
 528 (defun vc-svn-dir-state-heuristic (dir)
 529   "Find the SVN state of all files in DIR, using only local information."
 530   (vc-svn-dir-state dir 'local))
 531
 532 (defun vc-svn-valid-symbolic-tag-name-p (tag)
 533   "Return non-nil if TAG is a valid symbolic tag name."
 534   ;; According to the SVN manual, a valid symbolic tag must start with
 535   ;; an uppercase or lowercase letter and can contain uppercase and
 536   ;; lowercase letters, digits, `-', and `_'.
 537   (and (string-match "^[a-zA-Z]" tag)
 538        (not (string-match "[^a-z0-9A-Z-_]" tag))))
 539
 540 (defun vc-svn-valid-version-number-p (tag)
 541   "Return non-nil if TAG is a valid version number."
 542   (and (string-match "^[0-9]" tag)
 543        (not (string-match "[^0-9]" tag))))
 544
 545 ;; Support for `svn annotate'
 546
 547 (defun vc-svn-annotate-command (file buf &optional rev)
 548   (vc-svn-command buf 0 file "annotate" (if rev (concat "-r" rev))))
 549
 550 (defun vc-svn-annotate-time-of-rev (rev)
 551   ;; Arbitrarily assume 10 commmits per day.
 552   (/ (string-to-number rev) 10.0))
 553
 554 (defun vc-svn-annotate-current-time ()
 555   (vc-svn-annotate-time-of-rev vc-annotate-parent-rev))
 556
 557 (defconst vc-svn-annotate-re "[ \t]*\\([0-9]+\\)[ \t]+[^\t ]+ ")
 558
 559 (defun vc-svn-annotate-time ()
 560   (when (looking-at vc-svn-annotate-re)
 561     (goto-char (match-end 0))
 562     (vc-svn-annotate-time-of-rev (match-string 1))))
 563
 564 (defun vc-svn-annotate-extract-revision-at-line ()
 565   (save-excursion
 566     (beginning-of-line)
 567     (if (looking-at vc-svn-annotate-re) (match-string 1))))
 568
 569 (provide 'vc-svn)
 570
 571 ;; arch-tag: 02f10c68-2b4d-453a-90fc-1eee6cfb268d
 572 ;;; vc-svn.el ends here