lisp/vc-bzr.el

   1 ;;; vc-bzr.el --- VC backend for the bzr revision control system
   2
   3 ;; Copyright (C) 2006, 2007, 2008  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: 2008-01-04 (Bzr revno 25)
   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.  See
  30 ;; <URL:http://launchpad.net/vc-bzr> for alternate development
  31 ;; branches of `vc-bzr'.
  32
  33 ;; Load this library to register bzr support in VC.
  34
  35 ;; Known bugs
  36 ;; ==========
  37
  38 ;; When edititing a symlink and *both* the symlink and its target
  39 ;; are bzr-versioned, `vc-bzr` presently runs `bzr status` on the
  40 ;; symlink, thereby not detecting whether the actual contents
  41 ;; (that is, the target contents) are changed.
  42 ;; See https://bugs.launchpad.net/vc-bzr/+bug/116607
  43
  44 ;; For an up-to-date list of bugs, please see:
  45 ;;   https://bugs.launchpad.net/vc-bzr/+bugs
  46
  47
  48 ;;; Code:
  49
  50 (eval-when-compile
  51   (require 'cl)
  52   (require 'vc))                        ; for vc-exec-after
  53
  54 ;; Clear up the cache to force vc-call to check again and discover
  55 ;; new functions when we reload this file.
  56 (put 'Bzr 'vc-functions nil)
  57
  58 (defgroup vc-bzr nil
  59   "VC bzr backend."
  60   :version "22.2"
  61   :group 'vc)
  62
  63 (defcustom vc-bzr-program "bzr"
  64   "Name of the bzr command (excluding any arguments)."
  65   :group 'vc-bzr
  66   :type 'string)
  67
  68 (defcustom vc-bzr-diff-switches nil
  69   "String/list of strings specifying extra switches for bzr diff under VC."
  70   :type '(choice (const :tag "None" nil)
  71                  (string :tag "Argument String")
  72                  (repeat :tag "Argument List" :value ("") string))
  73   :group 'vc-bzr)
  74
  75 (defcustom vc-bzr-log-switches nil
  76   "String/list of strings specifying extra switches for `bzr log' under VC."
  77   :type '(choice (const :tag "None" nil)
  78                  (string :tag "Argument String")
  79                  (repeat :tag "Argument List" :value ("") string))
  80   :group 'vc-bzr)
  81
  82 ;; since v0.9, bzr supports removing the progress indicators
  83 ;; by setting environment variable BZR_PROGRESS_BAR to "none".
  84 (defun vc-bzr-command (bzr-command buffer okstatus file-or-list &rest args)
  85   "Wrapper round `vc-do-command' using `vc-bzr-program' as COMMAND.
  86 Invoke the bzr command adding `BZR_PROGRESS_BAR=none' and
  87 `LC_MESSAGES=C' to the environment."
  88   (let ((process-environment
  89          (list* "BZR_PROGRESS_BAR=none" ; Suppress progress output (bzr >=0.9)
  90                 "LC_MESSAGES=C"         ; Force English output
  91                 process-environment)))
  92     (apply 'vc-do-command buffer okstatus vc-bzr-program
  93            file-or-list bzr-command args)))
  94
  95
  96 ;;;###autoload
  97 (defconst vc-bzr-admin-dirname ".bzr"
  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 (defconst vc-bzr-admin-lastrev
 109   (concat vc-bzr-admin-dirname "/branch/last-revision"))
 110
 111 ;;;###autoload (defun vc-bzr-registered (file)
 112 ;;;###autoload   (if (vc-find-root file vc-bzr-admin-checkout-format-file)
 113 ;;;###autoload       (progn
 114 ;;;###autoload         (load "vc-bzr")
 115 ;;;###autoload         (vc-bzr-registered file))))
 116
 117 (defun vc-bzr-root (file)
 118   "Return the root directory of the bzr repository containing FILE."
 119   ;; Cache technique copied from vc-arch.el.
 120   (or (vc-file-getprop file 'bzr-root)
 121       (let ((root (vc-find-root file vc-bzr-admin-checkout-format-file)))
 122         (when root (vc-file-setprop file 'bzr-root root)))))
 123
 124 (defun vc-bzr-registered (file)
 125   "Return non-nil if FILE is registered with bzr.
 126
 127 For speed, this function tries first to parse Bzr internal file
 128 `checkout/dirstate', but it may fail if Bzr internal file format
 129 has changed.  As a safeguard, the `checkout/dirstate' file is
 130 only parsed if it contains the string `#bazaar dirstate flat
 131 format 3' in the first line.
 132
 133 If the `checkout/dirstate' file cannot be parsed, fall back to
 134 running `vc-bzr-state'."
 135   (lexical-let ((root (vc-bzr-root file)))
 136     (when root    ; Short cut.
 137       ;; This looks at internal files.  May break if they change
 138       ;; their format.
 139       (lexical-let ((dirstate (expand-file-name vc-bzr-admin-dirstate root)))
 140         (if (not (file-readable-p dirstate))
 141             (vc-bzr-state file)         ; Expensive.
 142           (with-temp-buffer
 143             (insert-file-contents dirstate)
 144             (goto-char (point-min))
 145             (if (not (looking-at "#bazaar dirstate flat format 3"))
 146                 (vc-bzr-state file)     ; Some other unknown format?
 147               (let* ((relfile (file-relative-name file root))
 148                      (reldir (file-name-directory relfile)))
 149                 (re-search-forward
 150                  (concat "^\0"
 151                          (if reldir (regexp-quote (directory-file-name reldir)))
 152                          "\0"
 153                          (regexp-quote (file-name-nondirectory relfile))
 154                          "\0")
 155                  nil t)))))))))
 156
 157 (defconst vc-bzr-state-words
 158   "added\\|ignored\\|kind changed\\|modified\\|removed\\|renamed\\|unknown"
 159   "Regexp matching file status words as reported in `bzr' output.")
 160
 161 (defun vc-bzr-file-name-relative (filename)
 162   "Return file name FILENAME stripped of the initial Bzr repository path."
 163   (lexical-let*
 164       ((filename* (expand-file-name filename))
 165        (rootdir (vc-bzr-root filename*)))
 166     (when rootdir
 167          (file-relative-name filename* rootdir))))
 168
 169 (defun vc-bzr-status (file)
 170   "Return FILE status according to Bzr.
 171 Return value is a cons (STATUS . WARNING), where WARNING is a
 172 string or nil, and STATUS is one of the symbols: `added',
 173 `ignored', `kindchanged', `modified', `removed', `renamed', `unknown',
 174 which directly correspond to `bzr status' output, or 'unchanged
 175 for files whose copy in the working tree is identical to the one
 176 in the branch repository, or nil for files that are not
 177 registered with Bzr.
 178
 179 If any error occurred in running `bzr status', then return nil."
 180   (with-temp-buffer
 181     (let ((ret (condition-case nil
 182                    (vc-bzr-command "status" t 0 file)
 183                  (file-error nil)))     ; vc-bzr-program not found.
 184           (status 'unchanged))
 185           ;; the only secure status indication in `bzr status' output
 186           ;; is a couple of lines following the pattern::
 187           ;;   | <status>:
 188           ;;   |   <file name>
 189           ;; if the file is up-to-date, we get no status report from `bzr',
 190           ;; so if the regexp search for the above pattern fails, we consider
 191           ;; the file to be up-to-date.
 192           (goto-char (point-min))
 193           (when (re-search-forward
 194                  ;; bzr prints paths relative to the repository root.
 195                  (concat "^\\(" vc-bzr-state-words "\\):[ \t\n]+"
 196                          (regexp-quote (vc-bzr-file-name-relative file))
 197                          ;; Bzr appends a '/' to directory names and
 198                          ;; '*' to executable files
 199                          (if (file-directory-p file) "/?" "\\*?")
 200                          "[ \t\n]*$")
 201                  nil t)
 202             (lexical-let ((statusword (match-string 1)))
 203               ;; Erase the status text that matched.
 204               (delete-region (match-beginning 0) (match-end 0))
 205               (setq status
 206                     (intern (replace-regexp-in-string " " "" statusword)))))
 207           (when status
 208             (goto-char (point-min))
 209             (skip-chars-forward " \n\t") ;Throw away spaces.
 210             (cons status
 211                   ;; "bzr" will output warnings and informational messages to
 212                   ;; stderr; due to Emacs' `vc-do-command' (and, it seems,
 213                   ;; `start-process' itself) limitations, we cannot catch stderr
 214                   ;; and stdout into different buffers.  So, if there's anything
 215                   ;; left in the buffer after removing the above status
 216                   ;; keywords, let us just presume that any other message from
 217                   ;; "bzr" is a user warning, and display it.
 218                   (unless (eobp) (buffer-substring (point) (point-max))))))))
 219
 220 (defun vc-bzr-state (file)
 221   (lexical-let ((result (vc-bzr-status file)))
 222     (when (consp result)
 223       (if (cdr result)
 224           (message "Warnings in `bzr' output: %s" (cdr result)))
 225       (cdr (assq (car result)
 226                  '((added . edited)
 227                    (kindchanged . edited)
 228                    (renamed . edited)
 229                    (modified . edited)
 230                    (removed . edited)
 231                    (ignored . nil)
 232                    (unknown . nil)
 233                    (unchanged . up-to-date)))))))
 234
 235 (defun vc-bzr-resolve-when-done ()
 236   "Call \"bzr resolve\" if the conflict markers have been removed."
 237   (save-excursion
 238     (goto-char (point-min))
 239     (unless (re-search-forward "^<<<<<<< " nil t)
 240       (vc-bzr-command "resolve" nil 0 buffer-file-name)
 241       ;; Remove the hook so that it is not called multiple times.
 242       (remove-hook 'after-save-hook 'vc-bzr-resolve-when-done t))))
 243
 244 (defun vc-bzr-find-file-hook ()
 245   (when (and buffer-file-name
 246              ;; FIXME: We should check that "bzr status" says "conflict".
 247              (file-exists-p (concat buffer-file-name ".BASE"))
 248              (file-exists-p (concat buffer-file-name ".OTHER"))
 249              (file-exists-p (concat buffer-file-name ".THIS"))
 250              ;; If "bzr status" says there's a conflict but there are no
 251              ;; conflict markers, it's not clear what we should do.
 252              (save-excursion
 253                (goto-char (point-min))
 254                (re-search-forward "^<<<<<<< " nil t)))
 255     ;; TODO: the merge algorithm used in `bzr merge' is nicely configurable,
 256     ;; but the one in `bzr pull' isn't, so it would be good to provide an
 257     ;; elisp function to remerge from the .BASE/OTHER/THIS files.
 258     (smerge-start-session)
 259     (add-hook 'after-save-hook 'vc-bzr-resolve-when-done nil t)
 260     (message "There are unresolved conflicts in this file")))
 261
 262 (defun vc-bzr-workfile-unchanged-p (file)
 263   (eq 'unchanged (car (vc-bzr-status file))))
 264
 265 (defun vc-bzr-working-revision (file)
 266   (lexical-let*
 267       ((rootdir (vc-bzr-root file))
 268        (branch-format-file (expand-file-name vc-bzr-admin-branch-format-file
 269                                              rootdir))
 270        (revhistory-file (expand-file-name vc-bzr-admin-revhistory rootdir))
 271        (lastrev-file (expand-file-name vc-bzr-admin-lastrev rootdir)))
 272     ;; This looks at internal files to avoid forking a bzr process.
 273     ;; May break if they change their format.
 274     (if (file-exists-p branch-format-file)
 275         (with-temp-buffer
 276           (insert-file-contents branch-format-file)
 277           (goto-char (point-min))
 278           (cond
 279            ((or
 280              (looking-at "Bazaar-NG branch, format 0.0.4")
 281              (looking-at "Bazaar-NG branch format 5"))
 282             ;; count lines in .bzr/branch/revision-history
 283             (insert-file-contents revhistory-file)
 284             (number-to-string (count-lines (line-end-position) (point-max))))
 285            ((looking-at "Bazaar Branch Format 6 (bzr 0.15)")
 286             ;; revno is the first number in .bzr/branch/last-revision
 287             (insert-file-contents lastrev-file)
 288             (if (re-search-forward "[0-9]+" nil t)
 289                 (buffer-substring (match-beginning 0) (match-end 0))))))
 290       ;; fallback to calling "bzr revno"
 291       (lexical-let*
 292           ((result (vc-bzr-command-discarding-stderr
 293                     vc-bzr-program "revno" file))
 294            (exitcode (car result))
 295            (output (cdr result)))
 296         (cond
 297          ((eq exitcode 0) (substring output 0 -1))
 298          (t nil))))))
 299
 300 (defun vc-bzr-checkout-model (file)
 301   'implicit)
 302
 303 (defun vc-bzr-create-repo ()
 304   "Create a new Bzr repository."
 305   (vc-bzr-command "init" nil 0 nil))
 306
 307 (defun vc-bzr-init-revision (&optional file)
 308   "Always return nil, as Bzr cannot register explicit versions."
 309   nil)
 310
 311 (defun vc-bzr-register (files &optional rev comment)
 312   "Register FILE under bzr.
 313 Signal an error unless REV is nil.
 314 COMMENT is ignored."
 315   (if rev (error "Can't register explicit revision with bzr"))
 316   (vc-bzr-command "add" nil 0 files))
 317
 318 ;; Could run `bzr status' in the directory and see if it succeeds, but
 319 ;; that's relatively expensive.
 320 (defalias 'vc-bzr-responsible-p 'vc-bzr-root
 321   "Return non-nil if FILE is (potentially) controlled by bzr.
 322 The criterion is that there is a `.bzr' directory in the same
 323 or a superior directory.")
 324
 325 (defun vc-bzr-could-register (file)
 326   "Return non-nil if FILE could be registered under bzr."
 327   (and (vc-bzr-responsible-p file)      ; shortcut
 328        (condition-case ()
 329            (with-temp-buffer
 330              (vc-bzr-command "add" t 0 file "--dry-run")
 331              ;; The command succeeds with no output if file is
 332              ;; registered (in bzr 0.8).
 333              (goto-char (point-min))
 334              (looking-at "added "))
 335          (error))))
 336
 337 (defun vc-bzr-unregister (file)
 338   "Unregister FILE from bzr."
 339   (vc-bzr-command "remove" nil 0 file "--keep"))
 340
 341 (defun vc-bzr-checkin (files rev comment)
 342   "Check FILE in to bzr with log message COMMENT.
 343 REV non-nil gets an error."
 344   (if rev (error "Can't check in a specific revision with bzr"))
 345   (vc-bzr-command "commit" nil 0 files "-m" comment))
 346
 347 (defun vc-bzr-find-version (file rev buffer)
 348   "Fetch version REV of file FILE and put it into BUFFER."
 349     (with-current-buffer buffer
 350       (if (and rev (stringp rev) (not (string= rev "")))
 351           (vc-bzr-command "cat" t 0 file "-r" rev)
 352         (vc-bzr-command "cat" t 0 file))))
 353
 354 (defun vc-bzr-checkout (file &optional editable rev destfile)
 355   "Checkout revision REV of FILE from bzr to DESTFILE.
 356 EDITABLE is ignored."
 357   (unless destfile
 358     (setq destfile (vc-version-backup-file-name file rev)))
 359   (let ((coding-system-for-read 'binary)
 360         (coding-system-for-write 'binary))
 361     (with-temp-file destfile
 362       (if (and rev (stringp rev) (not (string= rev "")))
 363           (vc-bzr-command "cat" t 0 file "-r" rev)
 364         (vc-bzr-command "cat" t 0 file)))))
 365
 366 (defun vc-bzr-revert (file &optional contents-done)
 367   (unless contents-done
 368     (with-temp-buffer (vc-bzr-command "revert" t 0 file))))
 369
 370 (defvar log-view-message-re)
 371 (defvar log-view-file-re)
 372 (defvar log-view-font-lock-keywords)
 373 (defvar log-view-current-tag-function)
 374
 375 (define-derived-mode vc-bzr-log-view-mode log-view-mode "Bzr-Log-View"
 376   (remove-hook 'log-view-mode-hook 'vc-bzr-log-view-mode) ;Deactivate the hack.
 377   (require 'add-log)
 378   (set (make-local-variable 'log-view-file-re) "^Working file:[ \t]+\\(.+\\)")
 379   (set (make-local-variable 'log-view-message-re)
 380        "^ *-+\n *\\(?:revno: \\([0-9.]+\\)\\|merged: .+\\)")
 381   (set (make-local-variable 'log-view-font-lock-keywords)
 382        ;; log-view-font-lock-keywords is careful to use the buffer-local
 383        ;; value of log-view-message-re only since Emacs-23.
 384        (append `((,log-view-message-re . 'log-view-message-face))
 385                ;; log-view-font-lock-keywords
 386                '(("^ *committer: \
 387 \\([^<(]+?\\)[  ]*[(<]\\([[:alnum:]_.+-]+@[[:alnum:]_.-]+\\)[>)]"
 388                   (1 'change-log-name)
 389                   (2 'change-log-email))
 390                  ("^ *timestamp: \\(.*\\)" (1 'change-log-date-face))))))
 391
 392 (defun vc-bzr-print-log (files &optional buffer) ; get buffer arg in Emacs 22
 393   "Get bzr change log for FILES into specified BUFFER."
 394   ;; `vc-do-command' creates the buffer, but we need it before running
 395   ;; the command.
 396   (vc-setup-buffer buffer)
 397   ;; If the buffer exists from a previous invocation it might be
 398   ;; read-only.
 399   (let ((inhibit-read-only t))
 400     ;; FIXME: `vc-bzr-command' runs `bzr log' with `LC_MESSAGES=C', so
 401     ;; the log display may not what the user wants - but I see no other
 402     ;; way of getting the above regexps working.
 403     (dolist (file files)
 404       (with-current-buffer buffer
 405         ;; Insert the file name so that log-view.el can find it.
 406         (insert "Working file: " file "\n")) ;; Like RCS/CVS.
 407       (apply 'vc-bzr-command "log" buffer 0 file
 408              (if (stringp vc-bzr-log-switches)
 409                  (list vc-bzr-log-switches)
 410                vc-bzr-log-switches))))
 411   ;; FIXME: Until Emacs-23, VC was missing a hook to sort out the mode for
 412   ;; the buffer, or at least set the regexps right.
 413   (unless (fboundp 'vc-default-log-view-mode)
 414     (add-hook 'log-view-mode-hook 'vc-bzr-log-view-mode)))
 415
 416 (defun vc-bzr-show-log-entry (revision)
 417   "Find entry for patch name REVISION in bzr change log buffer."
 418   (goto-char (point-min))
 419   (let (case-fold-search)
 420     (if (re-search-forward
 421          ;; "revno:" can appear either at the beginning of a line, or indented.
 422          (concat "^[ ]*-+\n[ ]*revno: "
 423                  ;; The revision can contain ".", quote it so that it
 424                  ;; does not interfere with regexp matching.
 425                  (regexp-quote revision) "$") nil t)
 426         (beginning-of-line 0)
 427       (goto-char (point-min)))))
 428
 429 (defun vc-bzr-diff (files &optional rev1 rev2 buffer)
 430   "VC bzr backend for diff."
 431   ;; `bzr diff' exits with code 1 if diff is non-empty
 432   (apply #'vc-bzr-command "diff" (or buffer "*vc-diff*") 1 files
 433        "--diff-options" (mapconcat 'identity
 434                                    (vc-diff-switches-list bzr)
 435                                      " ")
 436        (list "-r" (format "%s..%s"
 437                           (or rev1 "revno:-1")
 438                           (or rev2 "")))))
 439
 440
 441 ;; FIXME: vc-{next,previous}-revision need fixing in vc.el to deal with
 442 ;; straight integer revisions.
 443
 444 (defun vc-bzr-delete-file (file)
 445   "Delete FILE and delete it in the bzr repository."
 446   (condition-case ()
 447       (delete-file file)
 448     (file-error nil))
 449   (vc-bzr-command "remove" nil 0 file))
 450
 451 (defun vc-bzr-rename-file (old new)
 452   "Rename file from OLD to NEW using `bzr mv'."
 453   (vc-bzr-command "mv" nil 0 new old))
 454
 455 (defvar vc-bzr-annotation-table nil
 456   "Internal use.")
 457 (make-variable-buffer-local 'vc-bzr-annotation-table)
 458
 459 (defun vc-bzr-annotate-command (file buffer &optional revision)
 460   "Prepare BUFFER for `vc-annotate' on FILE.
 461 Each line is tagged with the revision number, which has a `help-echo'
 462 property containing author and date information."
 463   (apply #'vc-bzr-command "annotate" buffer 0 file "--long" "--all"
 464          (if revision (list "-r" revision)))
 465   (with-current-buffer buffer
 466     ;; Store the tags for the annotated source lines in a hash table
 467     ;; to allow saving space by sharing the text properties.
 468     (setq vc-bzr-annotation-table (make-hash-table :test 'equal))
 469     (goto-char (point-min))
 470     (while (re-search-forward "^\\( *[0-9]+\\) +\\(.+\\) +\\([0-9]\\{8\\}\\) |"
 471                               nil t)
 472       (let* ((rev (match-string 1))
 473              (author (match-string 2))
 474              (date (match-string 3))
 475              (key (match-string 0))
 476              (tag (gethash key vc-bzr-annotation-table)))
 477         (unless tag
 478           (setq tag (propertize rev 'help-echo (concat "Author: " author
 479                                                        ", date: " date)
 480                                 'mouse-face 'highlight))
 481           (puthash key tag vc-bzr-annotation-table))
 482         (replace-match "")
 483         (insert tag " |")))))
 484
 485 (defun vc-bzr-annotate-time ()
 486   (when (re-search-forward "^ *[0-9]+ |" nil t)
 487     (let ((prop (get-text-property (line-beginning-position) 'help-echo)))
 488       (string-match "[0-9]+\\'" prop)
 489       (vc-annotate-convert-time
 490        (encode-time 0 0 0
 491                     (string-to-number (substring (match-string 0 prop) 6 8))
 492                     (string-to-number (substring (match-string 0 prop) 4 6))
 493                     (string-to-number (substring (match-string 0 prop) 0 4))
 494                     )))))
 495
 496 (defun vc-bzr-annotate-extract-revision-at-line ()
 497   "Return revision for current line of annoation buffer, or nil.
 498 Return nil if current line isn't annotated."
 499   (save-excursion
 500     (beginning-of-line)
 501     (if (looking-at " *\\([0-9]+\\) | ")
 502         (match-string-no-properties 1))))
 503
 504 (defun vc-bzr-command-discarding-stderr (command &rest args)
 505   "Execute shell command COMMAND (with ARGS); return its output and exitcode.
 506 Return value is a cons (EXITCODE . OUTPUT), where EXITCODE is
 507 the (numerical) exit code of the process, and OUTPUT is a string
 508 containing whatever the process sent to its standard output
 509 stream.  Standard error output is discarded."
 510   (with-temp-buffer
 511     (cons
 512      (apply #'call-process command nil (list (current-buffer) nil) nil args)
 513      (buffer-substring (point-min) (point-max)))))
 514
 515 ;; TODO: it would be nice to mark the conflicted files in  VC Dired,
 516 ;; and implement a command to run ediff and `bzr resolve' once the
 517 ;; changes have been merged.
 518 (defun vc-bzr-dir-state (dir &optional localp)
 519   "Find the VC state of all files in DIR and its subdirectories.
 520 Optional argument LOCALP is always ignored."
 521   (let ((bzr-root-directory (vc-bzr-root dir))
 522         (at-start t)
 523         current-bzr-state current-vc-state)
 524     ;; Check that DIR is a bzr repository.
 525     (unless (file-name-absolute-p bzr-root-directory)
 526       (error "Cannot find bzr repository for directory `%s'" dir))
 527     ;; `bzr ls --versioned' lists all versioned files;
 528     ;; assume they are up-to-date, unless we are given
 529     ;; evidence of the contrary.
 530     (setq at-start t)
 531     (with-temp-buffer
 532       (buffer-disable-undo)             ;; Because these buffers can get huge
 533       (vc-bzr-command "ls" t 0 nil "--versioned")
 534       (goto-char (point-min))
 535       (while (or at-start
 536                  (eq 0 (forward-line)))
 537         (setq at-start nil)
 538         (let ((file (expand-file-name
 539                      (buffer-substring-no-properties
 540                       (line-beginning-position) (line-end-position))
 541                      bzr-root-directory)))
 542           ;; files are up-to-date unless they appear in the `bzr
 543           ;; status' output below
 544           (vc-file-setprop file 'vc-state 'up-to-date)
 545           ;; XXX: is this correct? what happens if one
 546           ;; mixes different SCMs in the same dir?
 547           ;; Anyway, we're looking at the output of `bzr ls --versioned',
 548           ;; so we know these files are registered with Bzr.
 549           (vc-file-setprop file 'vc-backend 'Bzr))))
 550     ;; `bzr status' reports on added/modified/renamed and unknown/ignored files
 551     (setq at-start t)
 552     (with-temp-buffer
 553       (vc-bzr-command "status" t 0 nil)
 554       (goto-char (point-min))
 555       (while (or at-start
 556                  (eq 0 (forward-line)))
 557         (setq at-start nil)
 558         (cond
 559          ((looking-at "^added")
 560           (setq current-vc-state 'added)
 561           (setq current-bzr-state 'added))
 562          ((looking-at "^kind changed")
 563           (setq current-vc-state 'edited)
 564           (setq current-bzr-state 'kindchanged))
 565          ((looking-at "^modified")
 566           (setq current-vc-state 'edited)
 567           (setq current-bzr-state 'modified))
 568          ((looking-at "^renamed")
 569           (setq current-vc-state 'edited)
 570           (setq current-bzr-state 'renamed))
 571          ((looking-at "^ignored")
 572           (setq current-vc-state 'ignored)
 573           (setq current-bzr-state 'not-versioned))
 574          ((looking-at "^unknown")
 575           (setq current-vc-state 'unregistered)
 576           (setq current-bzr-state 'not-versioned))
 577          ((looking-at "  ")
 578           ;; file names are indented by two spaces
 579           (when current-vc-state
 580             (let ((file (expand-file-name
 581                          (buffer-substring-no-properties
 582                           (match-end 0) (line-end-position))
 583                          bzr-root-directory)))
 584               (vc-file-setprop file 'vc-state current-vc-state)
 585               (vc-file-setprop file 'vc-bzr-state current-bzr-state)
 586               (when (eq 'added current-bzr-state)
 587                 (vc-file-setprop file 'vc-working-revision "0"))))
 588           (when (eq 'not-versioned current-bzr-state)
 589             (let ((file (expand-file-name
 590                          (buffer-substring-no-properties
 591                           (match-end 0) (line-end-position))
 592                          bzr-root-directory)))
 593               (vc-file-setprop file 'vc-backend 'none)
 594               (vc-file-setprop file 'vc-state nil))))
 595          (t
 596           ;; skip this part of `bzr status' output
 597           (setq current-vc-state nil)
 598           (setq current-bzr-state nil)))))))
 599
 600 (defun vc-bzr-dired-state-info (file)
 601   "Bzr-specific version of `vc-dired-state-info'."
 602   (if (eq 'edited (vc-state file))
 603         (concat "(" (symbol-name (or (vc-file-getprop file 'vc-bzr-state)
 604                                      'edited)) ")")
 605     ;; else fall back to default vc.el representation
 606     (vc-default-dired-state-info 'Bzr file)))
 607
 608 (eval-after-load "vc"
 609   '(add-to-list 'vc-directory-exclusion-list vc-bzr-admin-dirname t))
 610
 611 (provide 'vc-bzr)
 612 ;; arch-tag: 8101bad8-4e92-4e7d-85ae-d8e08b4e7c06
 613 ;;; vc-bzr.el ends here