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