lisp/vc-bzr.el

   1 ;;; vc-bzr.el --- VC backend for the bzr revision control system
   2
   3 ;; Copyright (C) 2006, 2007  Free Software Foundation, Inc.
   4
   5 ;; Author: Dave Love <fx@gnu.org>, Riccardo Murri <riccardo.murri@gmail.com>
   6 ;; Keywords: tools
   7 ;; Created: Sept 2006
   8 ;; Version: 2007-08-03
   9 ;; URL: http://launchpad.net/vc-bzr
  10
  11 ;; This file 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, or (at your option)
  14 ;; any later version.
  15
  16 ;; This file 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; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26
  27 ;;; Commentary:
  28
  29 ;; See <URL:http://bazaar-vcs.org/> concerning bzr.
  30
  31 ;; Load this library to register bzr support in VC.  It covers basic VC
  32 ;; functionality, but was only lightly exercised with a few Emacs/bzr
  33 ;; version combinations, namely those current on the authors' PCs.
  34 ;; See various Fixmes below.
  35
  36
  37 ;; Known bugs
  38 ;; ==========
  39
  40 ;; When edititing a symlink and *both* the symlink and its target
  41 ;; are bzr-versioned, `vc-bzr` presently runs `bzr status` on the
  42 ;; symlink, thereby not detecting whether the actual contents
  43 ;; (that is, the target contents) are changed.
  44 ;; See https://bugs.launchpad.net/vc-bzr/+bug/116607
  45
  46 ;; For an up-to-date list of bugs, please see:
  47 ;;   https://bugs.launchpad.net/vc-bzr/+bugs
  48
  49
  50 ;;; Code:
  51
  52 (eval-when-compile
  53   (require 'cl)
  54   (require 'vc))                        ; for vc-exec-after
  55
  56 ;; Clear up the cache to force vc-call to check again and discover
  57 ;; new functions when we reload this file.
  58 (put 'Bzr 'vc-functions nil)
  59
  60 (defgroup vc-bzr nil
  61   "VC bzr backend."
  62 ;;   :version "22"
  63   :group 'vc)
  64
  65 (defcustom vc-bzr-program "bzr"
  66   "Name of the bzr command (excluding any arguments)."
  67   :group 'vc-bzr
  68   :type 'string)
  69
  70 ;; Fixme: there's probably no call for this.
  71 (defcustom vc-bzr-program-args nil
  72   "List of global arguments to pass to `vc-bzr-program'."
  73   :group 'vc-bzr
  74   :type '(repeat string))
  75
  76 (defcustom vc-bzr-diff-switches nil
  77   "String/list of strings specifying extra switches for bzr diff under VC."
  78   :type '(choice (const :tag "None" nil)
  79                  (string :tag "Argument String")
  80                  (repeat :tag "Argument List" :value ("") string))
  81   :group 'vc-bzr)
  82
  83 ;; since v0.9, bzr supports removing the progress indicators
  84 ;; by setting environment variable BZR_PROGRESS_BAR to "none".
  85 (defun vc-bzr-command (bzr-command buffer okstatus file-or-list &rest args)
  86   "Wrapper round `vc-do-command' using `vc-bzr-program' as COMMAND.
  87 Invoke the bzr command adding `BZR_PROGRESS_BAR=none' to the environment."
  88   (let ((process-environment
  89          (list* "BZR_PROGRESS_BAR=none" ; Suppress progress output (bzr >=0.9)
  90                 "LC_ALL=C"              ; Force English output
  91                 process-environment)))
  92     (apply 'vc-do-command buffer okstatus vc-bzr-program
  93            file-or-list bzr-command (append vc-bzr-program-args args))))
  94
  95
  96 ;;;###autoload
  97 (defconst vc-bzr-admin-dirname ".bzr"    ; FIXME: "_bzr" on w32?
  98   "Name of the directory containing Bzr repository status files.")
  99 ;;;###autoload
 100 (defconst vc-bzr-admin-checkout-format-file
 101   (concat vc-bzr-admin-dirname "/checkout/format"))
 102 (defconst vc-bzr-admin-dirstate
 103   (concat vc-bzr-admin-dirname "/checkout/dirstate"))
 104 (defconst vc-bzr-admin-branch-format-file
 105   (concat vc-bzr-admin-dirname "/branch/format"))
 106 (defconst vc-bzr-admin-revhistory
 107   (concat vc-bzr-admin-dirname "/branch/revision-history"))
 108
 109 ;;;###autoload (defun vc-bzr-registered (file)
 110 ;;;###autoload   (if (vc-find-root file vc-bzr-admin-checkout-format-file)
 111 ;;;###autoload       (progn
 112 ;;;###autoload         (load "vc-bzr")
 113 ;;;###autoload         (vc-bzr-registered file))))
 114
 115 (defun vc-bzr-root (file)
 116   "Return the root directory of the bzr repository containing FILE."
 117   ;; Cache technique copied from vc-arch.el.
 118   (or (vc-file-getprop file 'bzr-root)
 119       (vc-file-setprop
 120        file 'bzr-root
 121        (vc-find-root file vc-bzr-admin-checkout-format-file))))
 122
 123 (defun vc-bzr-registered (file)
 124   "Return non-nil if FILE is registered with bzr.
 125
 126 For speed, this function tries first to parse Bzr internal file
 127 `checkout/dirstate', but it may fail if Bzr internal file format
 128 has changed.  As a safeguard, the `checkout/dirstate' file is
 129 only parsed if it contains the string `#bazaar dirstate flat
 130 format 3' in the first line.
 131
 132 If the `checkout/dirstate' file cannot be parsed, fall back to
 133 running `vc-bzr-state'."
 134   (condition-case nil
 135       (lexical-let ((root (vc-bzr-root file)))
 136     (and root ; Short cut.
 137          ;; This looks at internal files.  May break if they change
 138          ;; their format.
 139              (lexical-let
 140                  ((dirstate-file (expand-file-name vc-bzr-admin-dirstate root)))
 141                (if (file-exists-p dirstate-file)
 142          (with-temp-buffer
 143                      (insert-file-contents dirstate-file)
 144            (goto-char (point-min))
 145                      (when (looking-at "#bazaar dirstate flat format 3")
 146            (let* ((relfile (file-relative-name file root))
 147                   (reldir (file-name-directory relfile)))
 148              (re-search-forward
 149                         (concat "^\0"
 150                       (if reldir (regexp-quote (directory-file-name reldir)))
 151                                 "\0"
 152                       (regexp-quote (file-name-nondirectory relfile))
 153                                 "\0")
 154                         nil t))))
 155                  t))
 156              (vc-bzr-state file)))  ; Expensive.
 157     (file-error nil))) ; vc-bzr-program not found
 158
 159 (defun vc-bzr-buffer-nonblank-p (&optional buffer)
 160   "Return non-nil if BUFFER contains any non-blank characters."
 161   (or (> (buffer-size buffer) 0)
 162       (save-excursion
 163         (set-buffer (or buffer (current-buffer)))
 164         (goto-char (point-min))
 165         (re-search-forward "[^ \t\n]" (point-max) t))))
 166
 167 (defconst vc-bzr-state-words
 168   "added\\|ignored\\|kind changed\\|modified\\|removed\\|renamed\\|unknown"
 169   "Regexp matching file status words as reported in `bzr' output.")
 170
 171 (defun vc-bzr-file-name-relative (filename)
 172   "Return file name FILENAME stripped of the initial Bzr repository path."
 173   (lexical-let*
 174       ((filename* (expand-file-name filename))
 175        (rootdir (vc-bzr-root (file-name-directory filename*))))
 176     (and rootdir
 177          (file-relative-name filename* rootdir))))
 178
 179 ;; FIXME:  Also get this in a non-registered sub-directory.
 180 ;; It already works for me. -- Riccardo
 181 (defun vc-bzr-status (file)
 182   "Return FILE status according to Bzr.
 183 Return value is a cons (STATUS . WARNING), where WARNING is a
 184 string or nil, and STATUS is one of the symbols: 'added,
 185 'ignored, 'kindchange, 'modified, 'removed, 'renamed, 'unknown,
 186 which directly correspond to `bzr status' output, or 'unchanged
 187 for files whose copy in the working tree is identical to the one
 188 in the branch repository, or nil for files that are not
 189 registered with Bzr.
 190
 191 If any error occurred in running `bzr status', then return nil."
 192   (condition-case nil
 193   (with-temp-buffer
 194         (let ((ret (vc-bzr-command "status" t 0 file))
 195               (status 'unchanged))
 196       ;; the only secure status indication in `bzr status' output
 197       ;; is a couple of lines following the pattern::
 198       ;;   | <status>:
 199       ;;   |   <file name>
 200       ;; if the file is up-to-date, we get no status report from `bzr',
 201       ;; so if the regexp search for the above pattern fails, we consider
 202       ;; the file to be up-to-date.
 203       (goto-char (point-min))
 204       (when
 205           (re-search-forward
 206                ;; bzr prints paths relative to the repository root
 207            (concat "^\\(" vc-bzr-state-words "\\):[ \t\n]+"
 208                        (regexp-quote (vc-bzr-file-name-relative file))
 209                        (if (file-directory-p file) "/?" "")
 210                        "[ \t\n]*$")
 211            (point-max) t)
 212         (let ((start (match-beginning 0))
 213               (end (match-end 0)))
 214           (goto-char start)
 215               (setq status
 216                 (cond
 217                  ((not (equal ret 0)) nil)
 218                      ((looking-at "added") 'added)
 219                      ((looking-at "kind changed") 'kindchange)
 220                      ((looking-at "renamed") 'renamed)
 221                      ((looking-at "modified") 'modified)
 222                      ((looking-at "removed") 'removed)
 223                      ((looking-at "ignored") 'ignored)
 224                      ((looking-at "unknown") 'unknown)))
 225           ;; erase the status text that matched
 226           (delete-region start end)))
 227           (if status
 228               (cons status
 229             ;; "bzr" will output warnings and informational messages to
 230             ;; stderr; due to Emacs' `vc-do-command' (and, it seems,
 231             ;; `start-process' itself) limitations, we cannot catch stderr
 232         ;; and stdout into different buffers.  So, if there's anything
 233         ;; left in the buffer after removing the above status
 234         ;; keywords, let us just presume that any other message from
 235         ;; "bzr" is a user warning, and display it.
 236                     (if (vc-bzr-buffer-nonblank-p)
 237                         (buffer-substring (point-min) (point-max)))))))
 238     (file-error nil))) ; vc-bzr-program not found
 239
 240 (defun vc-bzr-state (file)
 241   (lexical-let ((result (vc-bzr-status file)))
 242     (when (consp result)
 243       (if (cdr result)
 244           (message "Warnings in `bzr' output: %s" (cdr result)))
 245       (cdr (assq (car result)
 246                  '((added . edited)
 247                    (kindchange . edited)
 248                    (renamed . edited)
 249                    (modified . edited)
 250                    (removed . edited)
 251                    (ignored . nil)
 252                    (unknown . nil)
 253                    (unchanged . up-to-date)))))))
 254
 255 (defun vc-bzr-workfile-unchanged-p (file)
 256   (eq 'unchanged (car (vc-bzr-status file))))
 257
 258 (defun vc-bzr-workfile-version (file)
 259   (lexical-let*
 260       ((rootdir (vc-bzr-root file))
 261        (branch-format-file (concat rootdir "/" vc-bzr-admin-branch-format-file))
 262        (revhistory-file (concat rootdir "/" vc-bzr-admin-revhistory))
 263        (lastrev-file (concat rootdir "/" "branch/last-revision")))
 264     ;; Count lines in .bzr/branch/revision-history to avoid forking a
 265     ;; bzr process.  This looks at internal files.  May break if they
 266     ;; change their format.
 267     (if (file-exists-p branch-format-file)
 268   (with-temp-buffer
 269           (insert-file-contents branch-format-file)
 270           (goto-char (point-min))
 271           (cond
 272            ((or
 273              (looking-at "Bazaar-NG branch, format 0.0.4")
 274              (looking-at "Bazaar-NG branch format 5"))
 275             ;; count lines in .bzr/branch/revision-history
 276           (insert-file-contents revhistory-file)
 277             (number-to-string (count-lines (line-end-position) (point-max))))
 278            ((looking-at "Bazaar Branch Format 6 (bzr 0.15)")
 279             ;; revno is the first number in .bzr/branch/last-revision
 280             (insert-file-contents lastrev-file)
 281             (goto-char (line-end-position))
 282             (if (re-search-forward "[0-9]+" nil t)
 283                 (buffer-substring (match-beginning 0) (match-end 0))))))
 284       ;; fallback to calling "bzr revno"
 285       (lexical-let*
 286           ((result (vc-bzr-command-discarding-stderr
 287                     vc-bzr-program "revno" file))
 288            (exitcode (car result))
 289            (output (cdr result)))
 290         (cond
 291          ((eq exitcode 0) (substring output 0 -1))
 292          (t nil))))))
 293
 294 (defun vc-bzr-checkout-model (file)
 295   'implicit)
 296
 297 (defun vc-bzr-create-repo ()
 298   "Create a new Bzr repository."
 299   (vc-bzr-command "init" nil 0 nil))
 300
 301 (defun vc-bzr-register (files &optional rev comment)
 302   "Register FILE under bzr.
 303 Signal an error unless REV is nil.
 304 COMMENT is ignored."
 305   (if rev (error "Can't register explicit version with bzr"))
 306   (vc-bzr-command "add" nil 0 files))
 307
 308 ;; Could run `bzr status' in the directory and see if it succeeds, but
 309 ;; that's relatively expensive.
 310 (defalias 'vc-bzr-responsible-p 'vc-bzr-root
 311   "Return non-nil if FILE is (potentially) controlled by bzr.
 312 The criterion is that there is a `.bzr' directory in the same
 313 or a superior directory.")
 314
 315 (defun vc-bzr-could-register (file)
 316   "Return non-nil if FILE could be registered under bzr."
 317   (and (vc-bzr-responsible-p file)      ; shortcut
 318        (condition-case ()
 319            (with-temp-buffer
 320              (vc-bzr-command "add" t 0 file "--dry-run")
 321              ;; The command succeeds with no output if file is
 322              ;; registered (in bzr 0.8).
 323              (goto-char (point-min))
 324              (looking-at "added "))
 325          (error))))
 326
 327 (defun vc-bzr-unregister (file)
 328   "Unregister FILE from bzr."
 329   (vc-bzr-command "remove" nil 0 file))
 330
 331 (defun vc-bzr-checkin (files rev comment)
 332   "Check FILE in to bzr with log message COMMENT.
 333 REV non-nil gets an error."
 334   (if rev (error "Can't check in a specific version with bzr"))
 335   (vc-bzr-command "commit" nil 0 files "-m" comment))
 336
 337 (defun vc-bzr-checkout (file &optional editable rev destfile)
 338   "Checkout revision REV of FILE from bzr to DESTFILE.
 339 EDITABLE is ignored."
 340   (unless destfile
 341     (setq destfile (vc-version-backup-file-name file rev)))
 342   (let ((coding-system-for-read 'binary)
 343         (coding-system-for-write 'binary))
 344   (with-temp-file destfile
 345     (if rev
 346         (vc-bzr-command "cat" t 0 file "-r" rev)
 347       (vc-bzr-command "cat" t 0 file)))))
 348
 349 (defun vc-bzr-revert (file &optional contents-done)
 350   (unless contents-done
 351     (with-temp-buffer (vc-bzr-command "revert" t 0 file))))
 352
 353 (defvar log-view-message-re)
 354 (defvar log-view-file-re)
 355 (defvar log-view-font-lock-keywords)
 356 (defvar log-view-current-tag-function)
 357
 358 (define-derived-mode vc-bzr-log-view-mode log-view-mode "Bzr-Log-View"
 359   (remove-hook 'log-view-mode-hook 'vc-bzr-log-view-mode) ;Deactivate the hack.
 360   (require 'add-log)
 361   ;; Don't have file markers, so use impossible regexp.
 362   (set (make-local-variable 'log-view-file-re) "\\'\\`")
 363   (set (make-local-variable 'log-view-message-re)
 364        "^ *-+\n *\\(?:revno: \\([0-9]+\\)\\|merged: .+\\)")
 365   (set (make-local-variable 'log-view-font-lock-keywords)
 366        ;; log-view-font-lock-keywords is careful to use the buffer-local
 367        ;; value of log-view-message-re only since Emacs-23.
 368        (append `((,log-view-message-re . 'log-view-message-face))
 369                ;; log-view-font-lock-keywords
 370                '(("^ *committer: \
 371 \\([^<(]+?\\)[  ]*[(<]\\([[:alnum:]_.+-]+@[[:alnum:]_.-]+\\)[>)]"
 372                   (1 'change-log-name)
 373                   (2 'change-log-email))
 374                  ("^ *timestamp: \\(.*\\)" (1 'change-log-date-face))))))
 375
 376 (defun vc-bzr-print-log (files &optional buffer) ; get buffer arg in Emacs 22
 377   "Get bzr change log for FILES into specified BUFFER."
 378   ;; Fixme: This might need the locale fixing up if things like `revno'
 379   ;; got localized, but certainly it shouldn't use LC_ALL=C.
 380   ;; NB.  Can't be async -- see `vc-bzr-post-command-function'.
 381   (vc-bzr-command "log" buffer 0 files)
 382   ;; FIXME: Until Emacs-23, VC was missing a hook to sort out the mode for
 383   ;; the buffer, or at least set the regexps right.
 384   (unless (fboundp 'vc-default-log-view-mode)
 385     (add-hook 'log-view-mode-hook 'vc-bzr-log-view-mode)))
 386
 387 (defun vc-bzr-show-log-entry (version)
 388   "Find entry for patch name VERSION in bzr change log buffer."
 389   (goto-char (point-min))
 390   (let (case-fold-search)
 391     (if (re-search-forward (concat "^-+\nrevno: " version "$") nil t)
 392         (beginning-of-line 0)
 393       (goto-char (point-min)))))
 394
 395 (autoload 'vc-diff-switches-list "vc" nil nil t)
 396
 397 (defun vc-bzr-diff (files &optional rev1 rev2 buffer)
 398   "VC bzr backend for diff."
 399   (let ((working (vc-workfile-version (if (consp files) (car files) files))))
 400     (if (and (equal rev1 working) (not rev2))
 401         (setq rev1 nil))
 402     (if (and (not rev1) rev2)
 403         (setq rev1 working))
 404     ;; NB.  Can't be async -- see `vc-bzr-post-command-function'.
 405     ;; bzr diff produces condition code 1 for some reason.
 406     (apply #'vc-bzr-command "diff" (or buffer "*vc-diff*") 1 files
 407            "--diff-options" (mapconcat 'identity (vc-diff-switches-list bzr)
 408                                        " ")
 409            (when rev1
 410              (if rev2
 411                  (list "-r" (format "%s..%s" rev1 rev2))
 412                (list "-r" rev1))))))
 413
 414 (defalias 'vc-bzr-diff-tree 'vc-bzr-diff)
 415
 416
 417 ;; FIXME: vc-{next,previous}-version need fixing in vc.el to deal with
 418 ;; straight integer versions.
 419
 420 (defun vc-bzr-delete-file (file)
 421   "Delete FILE and delete it in the bzr repository."
 422   (condition-case ()
 423       (delete-file file)
 424     (file-error nil))
 425   (vc-bzr-command "remove" nil 0 file))
 426
 427 (defun vc-bzr-rename-file (old new)
 428   "Rename file from OLD to NEW using `bzr mv'."
 429   (vc-bzr-command "mv" nil 0 new old))
 430
 431 (defvar vc-bzr-annotation-table nil
 432   "Internal use.")
 433 (make-variable-buffer-local 'vc-bzr-annotation-table)
 434
 435 (defun vc-bzr-annotate-command (file buffer &optional version)
 436   "Prepare BUFFER for `vc-annotate' on FILE.
 437 Each line is tagged with the revision number, which has a `help-echo'
 438 property containing author and date information."
 439   (apply #'vc-bzr-command "annotate" buffer 0 file "-l" "--all"
 440          (if version (list "-r" version)))
 441   (with-current-buffer buffer
 442     ;; Store the tags for the annotated source lines in a hash table
 443     ;; to allow saving space by sharing the text properties.
 444     (setq vc-bzr-annotation-table (make-hash-table :test 'equal))
 445     (goto-char (point-min))
 446     (while (re-search-forward "^\\( *[0-9]+\\) \\(.+\\) +\\([0-9]\\{8\\}\\) |"
 447                               nil t)
 448       (let* ((rev (match-string 1))
 449              (author (match-string 2))
 450              (date (match-string 3))
 451              (key (match-string 0))
 452              (tag (gethash key vc-bzr-annotation-table)))
 453         (unless tag
 454           (save-match-data
 455             (string-match " +\\'" author)
 456             (setq author (substring author 0 (match-beginning 0))))
 457           (setq tag (propertize rev 'help-echo (concat "Author: " author
 458                                                        ", date: " date)
 459                                 'mouse-face 'highlight))
 460           (puthash key tag vc-bzr-annotation-table))
 461         (replace-match "")
 462         (insert tag " |")))))
 463
 464 ;; Definition from Emacs 22
 465 (unless (fboundp 'vc-annotate-convert-time)
 466 (defun vc-annotate-convert-time (time)
 467   "Convert a time value to a floating-point number of days.
 468 The argument TIME is a list as returned by `current-time' or
 469 `encode-time', only the first two elements of that list are considered."
 470   (/ (+ (* (float (car time)) (lsh 1 16)) (cadr time)) 24 3600)))
 471
 472 (defun vc-bzr-annotate-time ()
 473   (when (re-search-forward "^ *[0-9]+ |" nil t)
 474     (let ((prop (get-text-property (line-beginning-position) 'help-echo)))
 475       (string-match "[0-9]+\\'" prop)
 476       (vc-annotate-convert-time
 477        (encode-time 0 0 0
 478                     (string-to-number (substring (match-string 0 prop) 6 8))
 479                     (string-to-number (substring (match-string 0 prop) 4 6))
 480                     (string-to-number (substring (match-string 0 prop) 0 4))
 481                     )))))
 482
 483 (defun vc-bzr-annotate-extract-revision-at-line ()
 484   "Return revision for current line of annoation buffer, or nil.
 485 Return nil if current line isn't annotated."
 486   (save-excursion
 487     (beginning-of-line)
 488     (if (looking-at " *\\([0-9]+\\) | ")
 489         (match-string-no-properties 1))))
 490
 491 ;; Not needed for Emacs 22
 492 (defun vc-bzr-annotate-difference (point)
 493   (let ((next-time (vc-bzr-annotate-time)))
 494     (if next-time
 495         (- (vc-annotate-convert-time (current-time)) next-time))))
 496
 497 (defun vc-bzr-command-discarding-stderr (command &rest args)
 498   "Execute shell command COMMAND (with ARGS); return its output and exitcode.
 499 Return value is a cons (EXITCODE . OUTPUT), where EXITCODE is
 500 the (numerical) exit code of the process, and OUTPUT is a string
 501 containing whatever the process sent to its standard output
 502 stream.  Standard error output is discarded."
 503   (with-temp-buffer
 504     (cons
 505      (apply #'call-process command nil (list (current-buffer) nil) nil args)
 506      (buffer-substring (point-min) (point-max)))))
 507
 508 ;; TODO: it would be nice to mark the conflicted files in  VC Dired,
 509 ;; and implement a command to run ediff and `bzr resolve' once the
 510 ;; changes have been merged.
 511 (defun vc-bzr-dir-state (dir &optional localp)
 512   "Find the VC state of all files in DIR.
 513 Optional argument LOCALP is always ignored."
 514   (let ((bzr-root-directory (vc-bzr-root dir))
 515         (at-start t)
 516         current-bzr-state current-vc-state)
 517     ;; Check that DIR is a bzr repository.
 518     (unless (file-name-absolute-p bzr-root-directory)
 519       (error "Cannot find bzr repository for directory `%s'" dir))
 520     ;; `bzr ls --versioned' lists all versioned files;
 521     ;; assume they are up-to-date, unless we are given
 522     ;; evidence of the contrary.
 523     (setq at-start t)
 524     (with-temp-buffer
 525       (vc-bzr-command "ls" t 0 nil "--versioned" "--non-recursive")
 526       (goto-char (point-min))
 527       (while (or at-start
 528                  (eq 0 (forward-line)))
 529         (setq at-start nil)
 530         (let ((file (expand-file-name
 531                      (buffer-substring-no-properties
 532                       (line-beginning-position) (line-end-position))
 533                      bzr-root-directory)))
 534           (vc-file-setprop file 'vc-state 'up-to-date)
 535           ;; XXX: is this correct? what happens if one
 536           ;; mixes different SCMs in the same dir?
 537           (vc-file-setprop file 'vc-backend 'Bzr))))
 538     ;; `bzr status' reports on added/modified/renamed and unknown/ignored files
 539     (setq at-start t)
 540     (with-temp-buffer
 541       (vc-bzr-command "status" t 0 nil)
 542       (goto-char (point-min))
 543       (while (or at-start
 544                  (eq 0 (forward-line)))
 545         (setq at-start nil)
 546         (cond
 547          ((looking-at "^added")
 548           (setq current-vc-state 'edited)
 549           (setq current-bzr-state 'added))
 550          ((looking-at "^kind changed")
 551           (setq current-vc-state 'edited)
 552           (setq current-bzr-state 'kindchange))
 553          ((looking-at "^modified")
 554           (setq current-vc-state 'edited)
 555           (setq current-bzr-state 'modified))
 556          ((looking-at "^renamed")
 557           (setq current-vc-state 'edited)
 558           (setq current-bzr-state 'renamed))
 559          ((looking-at "^\\(unknown\\|ignored\\)")
 560           (setq current-vc-state nil)
 561           (setq current-bzr-state 'not-versioned))
 562          ((looking-at "  ")
 563           ;; file names are indented by two spaces
 564           (when current-vc-state
 565             (let ((file (expand-file-name
 566                          (buffer-substring-no-properties
 567                           (match-end 0) (line-end-position))
 568                          bzr-root-directory)))
 569               (vc-file-setprop file 'vc-state current-vc-state)
 570               (vc-file-setprop file 'vc-bzr-state current-bzr-state)
 571               (when (eq 'added current-bzr-state)
 572                 (vc-file-setprop file 'vc-workfile-version "0"))))
 573           (when (eq 'not-versioned current-bzr-state)
 574             (let ((file (expand-file-name
 575                          (buffer-substring-no-properties
 576                           (match-end 0) (line-end-position))
 577                          bzr-root-directory)))
 578               (vc-file-setprop file 'vc-backend 'none)
 579               (vc-file-setprop file 'vc-state nil))))
 580          (t
 581           ;; skip this part of `bzr status' output
 582           (setq current-vc-state nil)
 583           (setq current-bzr-state nil)))))))
 584
 585 (defun vc-bzr-dired-state-info (file)
 586   "Bzr-specific version of `vc-dired-state-info'."
 587   (if (eq 'edited (vc-state file))
 588       (let ((bzr-state (vc-file-getprop file 'vc-bzr-state)))
 589         (if bzr-state
 590             (concat "(" (symbol-name bzr-state) ")")
 591           ;; else fall back to default vc representation
 592           (vc-default-dired-state-info 'Bzr file)))))
 593
 594 ;; In case of just `(load "vc-bzr")', but that's probably the wrong
 595 ;; way to do it.
 596 (add-to-list 'vc-handled-backends 'Bzr)
 597
 598 (eval-after-load "vc"
 599   '(add-to-list 'vc-directory-exclusion-list vc-bzr-admin-dirname t))
 600
 601 (defconst vc-bzr-unload-hook
 602   (lambda ()
 603     (setq vc-handled-backends (delq 'Bzr vc-handled-backends))
 604     (remove-hook 'vc-post-command-functions 'vc-bzr-post-command-function)))
 605
 606 (provide 'vc-bzr)
 607 ;; arch-tag: 8101bad8-4e92-4e7d-85ae-d8e08b4e7c06
 608 ;;; vc-bzr.el ends here