lisp/vc/vc-svn.el

   1 ;;; vc-svn.el --- non-resident support for Subversion version-control
   2
   3 ;; Copyright (C) 2003-2012  Free Software Foundation, Inc.
   4
   5 ;; Author:      FSF (see vc.el for full credits)
   6 ;; Maintainer:  Stefan Monnier <monnier@gnu.org>
   7 ;; Package: vc
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Sync'd with Subversion's vc-svn.el as of revision 5801. but this version
  27 ;; has been extensively modified since to handle filesets.
  28
  29 ;;; Code:
  30
  31 (eval-when-compile
  32   (require 'vc))
  33
  34 ;; Clear up the cache to force vc-call to check again and discover
  35 ;; new functions when we reload this file.
  36 (put 'SVN 'vc-functions nil)
  37
  38 ;;;
  39 ;;; Customization options
  40 ;;;
  41
  42 (defgroup vc-svn nil
  43   "VC Subversion (svn) backend."
  44   :version "24.1"
  45   :group 'vc)
  46
  47 ;; FIXME there is also svnadmin.
  48 (defcustom vc-svn-program "svn"
  49   "Name of the SVN executable."
  50   :type 'string
  51   :group 'vc-svn)
  52
  53 (defcustom vc-svn-global-switches nil
  54   "Global switches to pass to any SVN command."
  55   :type '(choice (const :tag "None" nil)
  56                  (string :tag "Argument String")
  57                  (repeat :tag "Argument List"
  58                          :value ("")
  59                          string))
  60   :version "22.1"
  61   :group 'vc-svn)
  62
  63 (defcustom vc-svn-register-switches nil
  64   "Switches for registering a file into SVN.
  65 A string or list of strings passed to the checkin program by
  66 \\[vc-register].  If nil, use the value of `vc-register-switches'.
  67 If t, use no switches."
  68   :type '(choice (const :tag "Unspecified" nil)
  69                  (const :tag "None" t)
  70                  (string :tag "Argument String")
  71                  (repeat :tag "Argument List" :value ("") string))
  72   :version "22.1"
  73   :group 'vc-svn)
  74
  75 (defcustom vc-svn-diff-switches
  76   t                        ;`svn' doesn't support common args like -c or -b.
  77   "String or list of strings specifying extra switches for svn diff under VC.
  78 If nil, use the value of `vc-diff-switches' (or `diff-switches'),
  79 together with \"-x --diff-cmd=\"`diff-command' (since 'svn diff'
  80 does not support the default \"-c\" value of `diff-switches').
  81 If you want to force an empty list of arguments, use t."
  82   :type '(choice (const :tag "Unspecified" nil)
  83                  (const :tag "None" t)
  84                  (string :tag "Argument String")
  85                  (repeat :tag "Argument List"
  86                          :value ("")
  87                          string))
  88   :version "22.1"
  89   :group 'vc-svn)
  90
  91 (defcustom vc-svn-header '("\$Id\$")
  92   "Header keywords to be inserted by `vc-insert-headers'."
  93   :version "24.1"     ; no longer consult the obsolete vc-header-alist
  94   :type '(repeat string)
  95   :group 'vc-svn)
  96
  97 ;; We want to autoload it for use by the autoloaded version of
  98 ;; vc-svn-registered, but we want the value to be compiled at startup, not
  99 ;; at dump time.
 100 ;; ;;;###autoload
 101 (defconst vc-svn-admin-directory
 102   (cond ((and (memq system-type '(cygwin windows-nt ms-dos))
 103               (getenv "SVN_ASP_DOT_NET_HACK"))
 104          "_svn")
 105         (t ".svn"))
 106   "The name of the \".svn\" subdirectory or its equivalent.")
 107
 108 ;;; Properties of the backend
 109
 110 (defun vc-svn-revision-granularity () 'repository)
 111 (defun vc-svn-checkout-model (files) 'implicit)
 112
 113 ;;;
 114 ;;; State-querying functions
 115 ;;;
 116
 117 ;;; vc-svn-admin-directory is generally not defined when the
 118 ;;; autoloaded function is called.
 119
 120 ;;;###autoload (defun vc-svn-registered (f)
 121 ;;;###autoload   (let ((admin-dir (cond ((and (eq system-type 'windows-nt)
 122 ;;;###autoload                                (getenv "SVN_ASP_DOT_NET_HACK"))
 123 ;;;###autoload                           "_svn")
 124 ;;;###autoload                          (t ".svn"))))
 125 ;;;###autoload     (when (vc-find-root f admin-dir)
 126 ;;;###autoload       (load "vc-svn")
 127 ;;;###autoload       (vc-svn-registered f))))
 128
 129 (defun vc-svn-registered (file)
 130   "Check if FILE is SVN registered."
 131   (when (vc-svn-root file)
 132     (with-temp-buffer
 133       (cd (file-name-directory file))
 134       (let* (process-file-side-effects
 135              (status
 136              (condition-case nil
 137                  ;; Ignore all errors.
 138                  (vc-svn-command t t file "status" "-v")
 139                ;; Some problem happened.  E.g. We can't find an `svn'
 140                ;; executable.  We used to only catch `file-error' but when
 141                ;; the process is run on a remote host via Tramp, the error
 142                ;; is only reported via the exit status which is turned into
 143                ;; an `error' by vc-do-command.
 144                (error nil))))
 145         (when (eq 0 status)
 146           (let ((parsed (vc-svn-parse-status file)))
 147             (and parsed (not (memq parsed '(ignored unregistered))))))))))
 148
 149 (defun vc-svn-state (file &optional localp)
 150   "SVN-specific version of `vc-state'."
 151   (let (process-file-side-effects)
 152     (setq localp (or localp (vc-stay-local-p file 'SVN)))
 153     (with-temp-buffer
 154       (cd (file-name-directory file))
 155       (vc-svn-command t 0 file "status" (if localp "-v" "-u"))
 156       (vc-svn-parse-status file))))
 157
 158 ;; NB this does not handle svn properties, which can be changed
 159 ;; without changing the file timestamp.
 160 ;; Note that unlike vc-cvs-state-heuristic, this is not called from
 161 ;; vc-svn-state.  AFAICS, it is only called from vc-state-refresh via
 162 ;; vc-after-save (bug#7850).  Therefore the fact that it ignores
 163 ;; properties is irrelevant.  If you want to make vc-svn-state call
 164 ;; this, it should be extended to handle svn properties.
 165 (defun vc-svn-state-heuristic (file)
 166   "SVN-specific state heuristic."
 167   ;; If the file has not changed since checkout, consider it `up-to-date'.
 168   ;; Otherwise consider it `edited'.  Copied from vc-cvs-state-heuristic.
 169   (let ((checkout-time (vc-file-getprop file 'vc-checkout-time))
 170         (lastmod (nth 5 (file-attributes file))))
 171     (cond
 172      ((equal checkout-time lastmod) 'up-to-date)
 173      ((string= (vc-working-revision file) "0") 'added)
 174      ((null checkout-time) 'unregistered)
 175      (t 'edited))))
 176
 177 ;; FIXME it would be better not to have the "remote" argument,
 178 ;; but to distinguish the two output formats based on content.
 179 (defun vc-svn-after-dir-status (callback &optional remote)
 180   (let ((state-map '((?A . added)
 181                      (?C . conflict)
 182                      (?I . ignored)
 183                      (?M . edited)
 184                      (?D . removed)
 185                      (?R . removed)
 186                      (?? . unregistered)
 187                      ;; This is what vc-svn-parse-status does.
 188                      (?~ . edited)))
 189         (re (if remote "^\\(.\\)\\(.\\).....? \\([ *]\\) +\\(?:[-0-9]+\\)?   \\(.*\\)$"
 190               ;; Subexp 3 is a dummy in this case, so the numbers match.
 191               "^\\(.\\)\\(.\\)...\\(.\\) \\(.*\\)$"))
 192        result)
 193     (goto-char (point-min))
 194     (while (re-search-forward re nil t)
 195       (let ((state (cdr (assq (aref (match-string 1) 0) state-map)))
 196             (propstat (cdr (assq (aref (match-string 2) 0) state-map)))
 197             (filename (if (memq system-type '(windows-nt ms-dos))
 198                           (replace-regexp-in-string "\\\\" "/" (match-string 4))
 199                         (match-string 4))))
 200         (and (memq propstat '(conflict edited))
 201              (not (eq state 'conflict)) ; conflict always wins
 202              (setq state propstat))
 203         (and remote (string-equal (match-string 3) "*")
 204              ;; FIXME are there other possible combinations?
 205              (cond ((eq state 'edited) (setq state 'needs-merge))
 206                    ((not state) (setq state 'needs-update))))
 207         (when (and state (not (string= "." filename)))
 208          (setq result (cons (list filename state) result)))))
 209     (funcall callback result)))
 210
 211 (defun vc-svn-dir-status (dir callback)
 212   "Run 'svn status' for DIR and update BUFFER via CALLBACK.
 213 CALLBACK is called as (CALLBACK RESULT BUFFER), where
 214 RESULT is a list of conses (FILE . STATE) for directory DIR."
 215   ;; FIXME should this rather be all the files in dir?
 216   ;; FIXME: the vc-stay-local-p logic below is disabled, it ends up
 217   ;; calling synchronously (vc-svn-registered DIR) => calling svn status -v DIR
 218   ;; which is VERY SLOW for big trees and it makes emacs
 219   ;; completely unresponsive during that time.
 220   (let* ((local (and nil (vc-stay-local-p dir 'SVN)))
 221          (remote (or t (not local) (eq local 'only-file))))
 222     (vc-svn-command (current-buffer) 'async nil "status"
 223                     (if remote "-u"))
 224   (vc-exec-after
 225      `(vc-svn-after-dir-status (quote ,callback) ,remote))))
 226
 227 (defun vc-svn-dir-status-files (dir files default-state callback)
 228   (apply 'vc-svn-command (current-buffer) 'async nil "status" files)
 229   (vc-exec-after
 230    `(vc-svn-after-dir-status (quote ,callback))))
 231
 232 (defun vc-svn-dir-extra-headers (dir)
 233   "Generate extra status headers for a Subversion working copy."
 234   (let (process-file-side-effects)
 235     (vc-svn-command "*vc*" 0 nil "info"))
 236   (let ((repo
 237          (save-excursion
 238            (and (progn
 239                   (set-buffer "*vc*")
 240                   (goto-char (point-min))
 241                   (re-search-forward "Repository Root: *\\(.*\\)" nil t))
 242                 (match-string 1)))))
 243     (concat
 244      (cond (repo
 245             (concat
 246              (propertize "Repository : " 'face 'font-lock-type-face)
 247              (propertize repo 'face 'font-lock-variable-name-face)))
 248            (t "")))))
 249
 250 (defun vc-svn-working-revision (file)
 251   "SVN-specific version of `vc-working-revision'."
 252   ;; There is no need to consult RCS headers under SVN, because we
 253   ;; get the workfile version for free when we recognize that a file
 254   ;; is registered in SVN.
 255   (vc-svn-registered file)
 256   (vc-file-getprop file 'vc-working-revision))
 257
 258 ;; vc-svn-mode-line-string doesn't exist because the default implementation
 259 ;; works just fine.
 260
 261 (defun vc-svn-previous-revision (file rev)
 262   (let ((newrev (1- (string-to-number rev))))
 263     (when (< 0 newrev)
 264       (number-to-string newrev))))
 265
 266 (defun vc-svn-next-revision (file rev)
 267   (let ((newrev (1+ (string-to-number rev))))
 268     ;; The "working revision" is an uneasy conceptual fit under Subversion;
 269     ;; we use it as the upper bound until a better idea comes along.  If the
 270     ;; workfile version W coincides with the tree's latest revision R, then
 271     ;; this check prevents a "no such revision: R+1" error.  Otherwise, it
 272     ;; inhibits showing of W+1 through R, which could be considered anywhere
 273     ;; from gracious to impolite.
 274     (unless (< (string-to-number (vc-file-getprop file 'vc-working-revision))
 275                newrev)
 276       (number-to-string newrev))))
 277
 278
 279 ;;;
 280 ;;; State-changing functions
 281 ;;;
 282
 283 (defun vc-svn-create-repo ()
 284   "Create a new SVN repository."
 285   (vc-do-command "*vc*" 0 "svnadmin" '("create" "SVN"))
 286   (vc-svn-command "*vc*" 0 "." "checkout"
 287                   (concat "file://" default-directory "SVN")))
 288
 289 (defun vc-svn-register (files &optional rev comment)
 290   "Register FILES into the SVN version-control system.
 291 The COMMENT argument is ignored  This does an add but not a commit.
 292 Passes either `vc-svn-register-switches' or `vc-register-switches'
 293 to the SVN command."
 294   (apply 'vc-svn-command nil 0 files "add" (vc-switches 'SVN 'register)))
 295
 296 (defun vc-svn-root (file)
 297   (vc-find-root file vc-svn-admin-directory))
 298
 299 (defalias 'vc-svn-responsible-p 'vc-svn-root)
 300
 301 (defalias 'vc-svn-could-register 'vc-svn-root
 302   "Return non-nil if FILE could be registered in SVN.
 303 This is only possible if SVN is responsible for FILE's directory.")
 304
 305 (defun vc-svn-checkin (files rev comment &optional extra-args-ignored)
 306   "SVN-specific version of `vc-backend-checkin'."
 307   (if rev (error "Committing to a specific revision is unsupported in SVN"))
 308   (let ((status (apply
 309                  'vc-svn-command nil 1 files "ci"
 310                  (nconc (list "-m" comment) (vc-switches 'SVN 'checkin)))))
 311     (set-buffer "*vc*")
 312     (goto-char (point-min))
 313     (unless (equal status 0)
 314       ;; Check checkin problem.
 315       (cond
 316        ((search-forward "Transaction is out of date" nil t)
 317         (mapc (lambda (file) (vc-file-setprop file 'vc-state 'needs-merge))
 318               files)
 319         (error (substitute-command-keys
 320                 (concat "Up-to-date check failed: "
 321                         "type \\[vc-next-action] to merge in changes"))))
 322        (t
 323         (pop-to-buffer (current-buffer))
 324         (goto-char (point-min))
 325         (shrink-window-if-larger-than-buffer)
 326         (error "Check-in failed"))))
 327     ;; Update file properties
 328     ;; (vc-file-setprop
 329     ;;  file 'vc-working-revision
 330     ;;  (vc-parse-buffer "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" 2))
 331     ))
 332
 333 (defun vc-svn-find-revision (file rev buffer)
 334   "SVN-specific retrieval of a specified version into a buffer."
 335   (let (process-file-side-effects)
 336     (apply 'vc-svn-command
 337            buffer 0 file
 338            "cat"
 339            (and rev (not (string= rev ""))
 340                 (concat "-r" rev))
 341            (vc-switches 'SVN 'checkout))))
 342
 343 (defun vc-svn-checkout (file &optional editable rev)
 344   (message "Checking out %s..." file)
 345   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 346     (vc-svn-update file editable rev (vc-switches 'SVN 'checkout)))
 347   (vc-mode-line file 'SVN)
 348   (message "Checking out %s...done" file))
 349
 350 (defun vc-svn-update (file editable rev switches)
 351   (if (and (file-exists-p file) (not rev))
 352       ;; If no revision was specified, there's nothing to do.
 353       nil
 354     ;; Check out a particular version (or recreate the file).
 355     (vc-file-setprop file 'vc-working-revision nil)
 356     (apply 'vc-svn-command nil 0 file
 357            "update"
 358            (cond
 359             ((null rev) "-rBASE")
 360             ((or (eq rev t) (equal rev "")) nil)
 361             (t (concat "-r" rev)))
 362            switches)))
 363
 364 (defun vc-svn-delete-file (file)
 365   (vc-svn-command nil 0 file "remove"))
 366
 367 (defun vc-svn-rename-file (old new)
 368   (vc-svn-command nil 0 new "move" (file-relative-name old)))
 369
 370 (defun vc-svn-revert (file &optional contents-done)
 371   "Revert FILE to the version it was based on."
 372   (unless contents-done
 373     (vc-svn-command nil 0 file "revert")))
 374
 375 (defun vc-svn-merge (file first-version &optional second-version)
 376   "Merge changes into current working copy of FILE.
 377 The changes are between FIRST-VERSION and SECOND-VERSION."
 378   (vc-svn-command nil 0 file
 379                  "merge"
 380                  "-r" (if second-version
 381                         (concat first-version ":" second-version)
 382                       first-version))
 383   (vc-file-setprop file 'vc-state 'edited)
 384   (with-current-buffer (get-buffer "*vc*")
 385     (goto-char (point-min))
 386     (if (looking-at "C  ")
 387         1                               ; signal conflict
 388       0)))                              ; signal success
 389
 390 (defun vc-svn-merge-news (file)
 391   "Merge in any new changes made to FILE."
 392   (message "Merging changes into %s..." file)
 393   ;; (vc-file-setprop file 'vc-working-revision nil)
 394   (vc-file-setprop file 'vc-checkout-time 0)
 395   (vc-svn-command nil 0 file "update")
 396   ;; Analyze the merge result reported by SVN, and set
 397   ;; file properties accordingly.
 398   (with-current-buffer (get-buffer "*vc*")
 399     (goto-char (point-min))
 400     ;; get new working revision
 401     (if (re-search-forward
 402          "^\\(Updated to\\|At\\) revision \\([0-9]+\\)" nil t)
 403         (vc-file-setprop file 'vc-working-revision (match-string 2))
 404       (vc-file-setprop file 'vc-working-revision nil))
 405     ;; get file status
 406     (goto-char (point-min))
 407     (prog1
 408         (if (looking-at "At revision")
 409             0 ;; there were no news; indicate success
 410           (if (re-search-forward
 411                ;; Newer SVN clients have 3 columns of chars (one for the
 412                ;; file's contents, then second for its properties, and the
 413                ;; third for lock-grabbing info), before the 2 spaces.
 414                ;; We also used to match the filename in column 0 without any
 415                ;; meta-info before it, but I believe this can never happen.
 416                (concat "^\\(\\([ACGDU]\\)\\(.[B ]\\)?  \\)"
 417                        (regexp-quote (file-relative-name file)))
 418                nil t)
 419               (cond
 420                ;; Merge successful, we are in sync with repository now
 421                ((string= (match-string 2) "U")
 422                 (vc-file-setprop file 'vc-state 'up-to-date)
 423                 (vc-file-setprop file 'vc-checkout-time
 424                                  (nth 5 (file-attributes file)))
 425                 0);; indicate success to the caller
 426                ;; Merge successful, but our own changes are still in the file
 427                ((string= (match-string 2) "G")
 428                 (vc-file-setprop file 'vc-state 'edited)
 429                 0);; indicate success to the caller
 430                ;; Conflicts detected!
 431                (t
 432                 (vc-file-setprop file 'vc-state 'edited)
 433                 1);; signal the error to the caller
 434                )
 435             (pop-to-buffer "*vc*")
 436             (error "Couldn't analyze svn update result")))
 437       (message "Merging changes into %s...done" file))))
 438
 439 (defun vc-svn-modify-change-comment (files rev comment)
 440   "Modify the change comments for a specified REV.
 441 You must have ssh access to the repository host, and the directory Emacs
 442 uses locally for temp files must also be writable by you on that host.
 443 This is only supported if the repository access method is either file://
 444 or svn+ssh://."
 445   (let (tempfile host remotefile directory fileurl-p)
 446     (with-temp-buffer
 447       (vc-svn-command (current-buffer) 0 nil "info")
 448       (goto-char (point-min))
 449       (unless (re-search-forward "Repository Root: \\(file://\\(/.*\\)\\)\\|\\(svn\\+ssh://\\([^/]+\\)\\(/.*\\)\\)" nil t)
 450         (error "Repository information is unavailable"))
 451       (if (match-string 1)
 452           (progn
 453             (setq fileurl-p t)
 454             (setq directory (match-string 2)))
 455         (setq host (match-string 4))
 456         (setq directory (match-string 5))
 457         (setq remotefile (concat host ":" tempfile))))
 458     (with-temp-file (setq tempfile (make-temp-file user-mail-address))
 459       (insert comment))
 460     (if fileurl-p
 461         ;; Repository Root is a local file.
 462         (progn
 463           (unless (vc-do-command
 464                    "*vc*" 0 "svnadmin" nil
 465                    "setlog" "--bypass-hooks" directory
 466                    "-r" rev (format "%s" tempfile))
 467             (error "Log edit failed"))
 468           (delete-file tempfile))
 469
 470       ;; Remote repository, using svn+ssh.
 471       (unless (vc-do-command "*vc*" 0 "scp" nil "-q" tempfile remotefile)
 472         (error "Copy of comment to %s failed" remotefile))
 473       (unless (vc-do-command
 474                "*vc*" 0 "ssh" nil "-q" host
 475                (format "svnadmin setlog --bypass-hooks %s -r %s %s; rm %s"
 476                        directory rev tempfile tempfile))
 477         (error "Log edit failed")))))
 478
 479 ;;;
 480 ;;; History functions
 481 ;;;
 482
 483 (defvar log-view-per-file-logs)
 484
 485 (define-derived-mode vc-svn-log-view-mode log-view-mode "SVN-Log-View"
 486   (require 'add-log)
 487   (set (make-local-variable 'log-view-per-file-logs) nil))
 488
 489 (defun vc-svn-print-log (files buffer &optional shortlog start-revision limit)
 490   "Get change log(s) associated with FILES."
 491   (save-current-buffer
 492     (vc-setup-buffer buffer)
 493     (let ((inhibit-read-only t))
 494       (goto-char (point-min))
 495       (if files
 496           (dolist (file files)
 497                   (insert "Working file: " file "\n")
 498                   (apply
 499                    'vc-svn-command
 500                    buffer
 501                    'async
 502                    ;; (if (and (= (length files) 1) (vc-stay-local-p file 'SVN)) 'async 0)
 503                    (list file)
 504                    "log"
 505                    (append
 506                     (list
 507                      (if start-revision
 508                          (format "-r%s" start-revision)
 509                        ;; By default Subversion only shows the log up to the
 510                        ;; working revision, whereas we also want the log of the
 511                        ;; subsequent commits.  At least that's what the
 512                        ;; vc-cvs.el code does.
 513                        "-rHEAD:0"))
 514                     (when limit (list "--limit" (format "%s" limit))))))
 515         ;; Dump log for the entire directory.
 516         (apply 'vc-svn-command buffer 0 nil "log"
 517                (append
 518                 (list
 519                  (if start-revision (format "-r%s" start-revision) "-rHEAD:0"))
 520                 (when limit (list "--limit" (format "%s" limit)))))))))
 521
 522 (defun vc-svn-diff (files &optional oldvers newvers buffer)
 523   "Get a difference report using SVN between two revisions of fileset FILES."
 524   (and oldvers
 525        (not newvers)
 526        files
 527        (catch 'no
 528          (dolist (f files)
 529            (or (equal oldvers (vc-working-revision f))
 530                (throw 'no nil)))
 531          t)
 532        ;; Use nil rather than the current revision because svn handles
 533        ;; it better (i.e. locally).  Note that if _any_ of the files
 534        ;; has a different revision, we fetch the lot, which is
 535        ;; obviously sub-optimal.
 536        (setq oldvers nil))
 537   (let* ((switches
 538             (if vc-svn-diff-switches
 539                 (vc-switches 'SVN 'diff)
 540               (list (concat "--diff-cmd=" diff-command) "-x"
 541                     (mapconcat 'identity (vc-switches nil 'diff) " "))))
 542            (async (and (not vc-disable-async-diff)
 543                        (vc-stay-local-p files 'SVN)
 544                        (or oldvers newvers)))) ; Svn diffs those locally.
 545       (apply 'vc-svn-command buffer
 546              (if async 'async 0)
 547              files "diff"
 548              (append
 549               switches
 550               (when oldvers
 551                 (list "-r" (if newvers (concat oldvers ":" newvers)
 552                              oldvers)))))
 553       (if async 1                     ; async diff => pessimistic assumption
 554         ;; For some reason `svn diff' does not return a useful
 555         ;; status w.r.t whether the diff was empty or not.
 556         (buffer-size (get-buffer buffer)))))
 557
 558 ;;;
 559 ;;; Tag system
 560 ;;;
 561
 562 (defun vc-svn-create-tag (dir name branchp)
 563   "Assign to DIR's current revision a given NAME.
 564 If BRANCHP is non-nil, the name is created as a branch (and the current
 565 workspace is immediately moved to that new branch).
 566 NAME is assumed to be a URL."
 567   (vc-svn-command nil 0 dir "copy" name)
 568   (when branchp (vc-svn-retrieve-tag dir name nil)))
 569
 570 (defun vc-svn-retrieve-tag (dir name update)
 571   "Retrieve a tag at and below DIR.
 572 NAME is the name of the tag; if it is empty, do a `svn update'.
 573 If UPDATE is non-nil, then update (resynch) any affected buffers.
 574 NAME is assumed to be a URL."
 575   (vc-svn-command nil 0 dir "switch" name)
 576   ;; FIXME: parse the output and obey `update'.
 577   )
 578
 579 ;;;
 580 ;;; Miscellaneous
 581 ;;;
 582
 583 ;; Subversion makes backups for us, so don't bother.
 584 ;; (defun vc-svn-make-version-backups-p (file)
 585 ;;   "Return non-nil if version backups should be made for FILE."
 586 ;;  (vc-stay-local-p file 'SVN))
 587
 588 (defun vc-svn-check-headers ()
 589   "Check if the current file has any headers in it."
 590   (save-excursion
 591     (goto-char (point-min))
 592     (re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
 593 \\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
 594
 595
 596 ;;;
 597 ;;; Internal functions
 598 ;;;
 599
 600 (defun vc-svn-command (buffer okstatus file-or-list &rest flags)
 601   "A wrapper around `vc-do-command' for use in vc-svn.el.
 602 The difference to vc-do-command is that this function always invokes `svn',
 603 and that it passes \"--non-interactive\" and `vc-svn-global-switches' to
 604 it before FLAGS."
 605   ;; Might be nice if svn defaulted to non-interactive if stdin not tty.
 606   ;; http://svn.haxx.se/dev/archive-2008-05/0762.shtml
 607   ;; http://svn.haxx.se/dev/archive-2009-04/0094.shtml
 608   ;; Maybe newer ones do?
 609   (or (member "--non-interactive"
 610               (setq flags (if (stringp vc-svn-global-switches)
 611              (cons vc-svn-global-switches flags)
 612                             (append vc-svn-global-switches flags))))
 613       (setq flags (cons "--non-interactive" flags)))
 614   (apply 'vc-do-command (or buffer "*vc*") okstatus vc-svn-program file-or-list
 615          flags))
 616
 617 (defun vc-svn-repository-hostname (dirname)
 618   (with-temp-buffer
 619     (let (process-file-side-effects)
 620       (vc-svn-command t t dirname "info" "--xml"))
 621     (goto-char (point-min))
 622     (when (re-search-forward "<url>\\(.*\\)</url>" nil t)
 623       ;; This is not a hostname but a URL.  This may actually be considered
 624       ;; as a feature since it allows vc-svn-stay-local to specify different
 625       ;; behavior for different modules on the same server.
 626       (match-string 1))))
 627
 628 (defun vc-svn-resolve-when-done ()
 629   "Call \"svn resolved\" if the conflict markers have been removed."
 630   (save-excursion
 631     (goto-char (point-min))
 632     (unless (re-search-forward "^<<<<<<< " nil t)
 633       (vc-svn-command nil 0 buffer-file-name "resolved")
 634       ;; Remove the hook so that it is not called multiple times.
 635       (remove-hook 'after-save-hook 'vc-svn-resolve-when-done t))))
 636
 637 ;; Inspired by vc-arch-find-file-hook.
 638 (defun vc-svn-find-file-hook ()
 639   (when (eq ?C (vc-file-getprop buffer-file-name 'vc-svn-status))
 640     ;; If the file is marked as "conflicted", then we should try and call
 641     ;; "svn resolved" when applicable.
 642     (if (save-excursion
 643           (goto-char (point-min))
 644           (re-search-forward "^<<<<<<< " nil t))
 645         ;; There are conflict markers.
 646         (progn
 647           (smerge-start-session)
 648           (add-hook 'after-save-hook 'vc-svn-resolve-when-done nil t))
 649       ;; There are no conflict markers.  This is problematic: maybe it means
 650       ;; the conflict has been resolved and we should immediately call "svn
 651       ;; resolved", or it means that the file's type does not allow Svn to
 652       ;; use conflict markers in which case we don't really know what to do.
 653       ;; So let's just punt for now.
 654       nil)
 655     (message "There are unresolved conflicts in this file")))
 656
 657 (defun vc-svn-parse-status (&optional filename)
 658   "Parse output of \"svn status\" command in the current buffer.
 659 Set file properties accordingly.  Unless FILENAME is non-nil, parse only
 660 information about FILENAME and return its status."
 661   (let (file status propstat)
 662     (goto-char (point-min))
 663     (while (re-search-forward
 664             ;; Ignore the files with status X.
 665             "^\\(?:\\?\\|[ ACDGIMR!~][ MC][ L][ +][ S]..\\([ *]\\) +\\([-0-9]+\\) +\\([0-9?]+\\) +\\([^ ]+\\)\\) +" nil t)
 666       ;; If the username contains spaces, the output format is ambiguous,
 667       ;; so don't trust the output's filename unless we have to.
 668       (setq file (or filename
 669                      (expand-file-name
 670                       (buffer-substring (point) (line-end-position)))))
 671       (setq status (char-after (line-beginning-position))
 672             ;; Status of the item's properties ([ MC]).
 673             propstat (char-after (1+ (line-beginning-position))))
 674       (if (eq status ??)
 675           (vc-file-setprop file 'vc-state 'unregistered)
 676         ;; Use the last-modified revision, so that searching in vc-print-log
 677         ;; output works.
 678         (vc-file-setprop file 'vc-working-revision (match-string 3))
 679         ;; Remember Svn's own status.
 680         (vc-file-setprop file 'vc-svn-status status)
 681         (vc-file-setprop
 682          file 'vc-state
 683          (cond
 684           ((and (eq status ?\ ) (eq propstat ?\ ))
 685            (if (eq (char-after (match-beginning 1)) ?*)
 686                'needs-update
 687              (vc-file-setprop file 'vc-checkout-time
 688                               (nth 5 (file-attributes file)))
 689              'up-to-date))
 690           ((eq status ?A)
 691            ;; If the file was actually copied, (match-string 2) is "-".
 692            (vc-file-setprop file 'vc-working-revision "0")
 693            (vc-file-setprop file 'vc-checkout-time 0)
 694            'added)
 695           ;; Conflict in contents or properties.
 696           ((or (eq status ?C) (eq propstat ?C))
 697            (vc-file-setprop file 'vc-state 'conflict))
 698           ;; Modified contents or properties.
 699           ((or (eq status ?M) (eq propstat ?M))
 700            (if (eq (char-after (match-beginning 1)) ?*)
 701                'needs-merge
 702              'edited))
 703           ((eq status ?I)
 704            (vc-file-setprop file 'vc-state 'ignored))
 705           ((memq status '(?D ?R))
 706            (vc-file-setprop file 'vc-state 'removed))
 707           (t 'edited)))))
 708     (when filename (vc-file-getprop filename 'vc-state))))
 709
 710 (defun vc-svn-valid-symbolic-tag-name-p (tag)
 711   "Return non-nil if TAG is a valid symbolic tag name."
 712   ;; According to the SVN manual, a valid symbolic tag must start with
 713   ;; an uppercase or lowercase letter and can contain uppercase and
 714   ;; lowercase letters, digits, `-', and `_'.
 715   (and (string-match "^[a-zA-Z]" tag)
 716        (not (string-match "[^a-z0-9A-Z-_]" tag))))
 717
 718 (defun vc-svn-valid-revision-number-p (tag)
 719   "Return non-nil if TAG is a valid revision number."
 720   (and (string-match "^[0-9]" tag)
 721        (not (string-match "[^0-9]" tag))))
 722
 723 ;; Support for `svn annotate'
 724
 725 (defun vc-svn-annotate-command (file buf &optional rev)
 726   (vc-svn-command buf 'async file "annotate" (if rev (concat "-r" rev))))
 727
 728 (defun vc-svn-annotate-time-of-rev (rev)
 729   ;; Arbitrarily assume 10 commits per day.
 730   (/ (string-to-number rev) 10.0))
 731
 732 (defvar vc-annotate-parent-rev)
 733
 734 (defun vc-svn-annotate-current-time ()
 735   (vc-svn-annotate-time-of-rev vc-annotate-parent-rev))
 736
 737 (defconst vc-svn-annotate-re "[ \t]*\\([0-9]+\\)[ \t]+[^\t ]+ ")
 738
 739 (defun vc-svn-annotate-time ()
 740   (when (looking-at vc-svn-annotate-re)
 741     (goto-char (match-end 0))
 742     (vc-svn-annotate-time-of-rev (match-string 1))))
 743
 744 (defun vc-svn-annotate-extract-revision-at-line ()
 745   (save-excursion
 746     (beginning-of-line)
 747     (if (looking-at vc-svn-annotate-re) (match-string 1))))
 748
 749 (defun vc-svn-revision-table (files)
 750   (let ((vc-svn-revisions '()))
 751     (with-current-buffer "*vc*"
 752       (vc-svn-command nil 0 files "log" "-q")
 753       (goto-char (point-min))
 754       (forward-line)
 755       (let ((start (point-min))
 756             (loglines (buffer-substring-no-properties (point-min)
 757                                                       (point-max))))
 758         (while (string-match "^r\\([0-9]+\\) " loglines)
 759           (push (match-string 1 loglines) vc-svn-revisions)
 760           (setq start (+ start (match-end 0)))
 761           (setq loglines (buffer-substring-no-properties start (point-max)))))
 762     vc-svn-revisions)))
 763
 764 (provide 'vc-svn)
 765
 766 ;;; vc-svn.el ends here