lisp/vc-hg.el

   1 ;;; vc-hg.el --- VC backend for the mercurial version control system
   2
   3 ;; Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
   4
   5 ;; Author: Ivan Kanis
   6 ;; Keywords: tools
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;; This is a mercurial version control backend
  26
  27 ;;; Thanks:
  28
  29 ;;; Bugs:
  30
  31 ;;; Installation:
  32
  33 ;;; Todo:
  34
  35 ;; 1) Implement the rest of the vc interface. See the comment at the
  36 ;; beginning of vc.el. The current status is:
  37
  38 ;; FUNCTION NAME                               STATUS
  39 ;; BACKEND PROPERTIES
  40 ;; * revision-granularity                      OK
  41 ;; STATE-QUERYING FUNCTIONS
  42 ;; * registered (file)                         OK
  43 ;; * state (file)                              OK
  44 ;; - state-heuristic (file)                    NOT NEEDED
  45 ;; - dir-status (dir update-function)          OK
  46 ;; - dir-status-files (dir files ds uf)        OK
  47 ;; - dir-extra-headers (dir)                OK
  48 ;; - dir-printer (fileinfo)                 OK
  49 ;; * working-revision (file)                   OK
  50 ;; - latest-on-branch-p (file)                 ??
  51 ;; * checkout-model (files)                    OK
  52 ;; - workfile-unchanged-p (file)               OK
  53 ;; - mode-line-string (file)                   NOT NEEDED
  54 ;; STATE-CHANGING FUNCTIONS
  55 ;; * register (files &optional rev comment)    OK
  56 ;; * create-repo ()                            OK
  57 ;; - init-revision ()                          NOT NEEDED
  58 ;; - responsible-p (file)                      OK
  59 ;; - could-register (file)                     OK
  60 ;; - receive-file (file rev)                   ?? PROBABLY NOT NEEDED
  61 ;; - unregister (file)                         COMMENTED OUT, MAY BE INCORRECT
  62 ;; * checkin (files rev comment)               OK
  63 ;; * find-revision (file rev buffer)           OK
  64 ;; * checkout (file &optional editable rev)    OK
  65 ;; * revert (file &optional contents-done)     OK
  66 ;; - rollback (files)                          ?? PROBABLY NOT NEEDED
  67 ;; - merge (file rev1 rev2)                    NEEDED
  68 ;; - merge-news (file)                         NEEDED
  69 ;; - steal-lock (file &optional revision)      NOT NEEDED
  70 ;; HISTORY FUNCTIONS
  71 ;; * print-log (files &optional buffer)        OK
  72 ;; - log-view-mode ()                          OK
  73 ;; - show-log-entry (revision)                 NOT NEEDED, DEFAULT IS GOOD
  74 ;; - comment-history (file)                    NOT NEEDED
  75 ;; - update-changelog (files)                  NOT NEEDED
  76 ;; * diff (files &optional rev1 rev2 buffer)   OK
  77 ;; - revision-completion-table (files)         OK?
  78 ;; - annotate-command (file buf &optional rev) OK
  79 ;; - annotate-time ()                          OK
  80 ;; - annotate-current-time ()                  NOT NEEDED
  81 ;; - annotate-extract-revision-at-line ()      OK
  82 ;; TAG SYSTEM
  83 ;; - create-tag (dir name branchp)       NEEDED
  84 ;; - retrieve-tag (dir name update)       NEEDED
  85 ;; MISCELLANEOUS
  86 ;; - make-version-backups-p (file)             ??
  87 ;; - repository-hostname (dirname)             ??
  88 ;; - previous-revision (file rev)              OK
  89 ;; - next-revision (file rev)                  OK
  90 ;; - check-headers ()                          ??
  91 ;; - clear-headers ()                          ??
  92 ;; - delete-file (file)                        TEST IT
  93 ;; - rename-file (old new)                     OK
  94 ;; - find-file-hook ()                         PROBABLY NOT NEEDED
  95 ;; - find-file-not-found-hook ()               PROBABLY NOT NEEDED
  96
  97 ;; 2) Implement Stefan Monnier's advice:
  98 ;; vc-hg-registered and vc-hg-state
  99 ;; Both of those functions should be super extra careful to fail gracefully in
 100 ;; unexpected circumstances. The reason this is important is that any error
 101 ;; there will prevent the user from even looking at the file :-(
 102 ;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
 103 ;; mercurial's control and extracting the current revision should be done
 104 ;; without even using `hg' (this way even if you don't have `hg' installed,
 105 ;; Emacs is able to tell you this file is under mercurial's control).
 106
 107 ;;; History:
 108 ;;
 109
 110 ;;; Code:
 111
 112 (eval-when-compile
 113   (require 'cl)
 114   (require 'vc)
 115   (require 'vc-dir))
 116
 117 ;;; Customization options
 118
 119 (defcustom vc-hg-global-switches nil
 120   "Global switches to pass to any Hg command."
 121   :type '(choice (const :tag "None" nil)
 122          (string :tag "Argument String")
 123          (repeat :tag "Argument List" :value ("") string))
 124   :version "22.2"
 125   :group 'vc)
 126
 127 (defcustom vc-hg-diff-switches t ; Hg doesn't support common args like -u
 128   "String or list of strings specifying switches for Hg diff under VC.
 129 If nil, use the value of `vc-diff-switches'.  If t, use no switches."
 130   :type '(choice (const :tag "Unspecified" nil)
 131                  (const :tag "None" t)
 132                  (string :tag "Argument String")
 133                  (repeat :tag "Argument List" :value ("") string))
 134   :version "23.1"
 135   :group 'vc)
 136
 137 \f
 138 ;;; Properties of the backend
 139
 140 (defun vc-hg-revision-granularity () 'repository)
 141 (defun vc-hg-checkout-model (files) 'implicit)
 142
 143 ;;; State querying functions
 144
 145 ;;;###autoload (defun vc-hg-registered (file)
 146 ;;;###autoload   "Return non-nil if FILE is registered with hg."
 147 ;;;###autoload   (if (vc-find-root file ".hg")       ; short cut
 148 ;;;###autoload       (progn
 149 ;;;###autoload         (load "vc-hg")
 150 ;;;###autoload         (vc-hg-registered file))))
 151
 152 ;; Modeled after the similar function in vc-bzr.el
 153 (defun vc-hg-registered (file)
 154   "Return non-nil if FILE is registered with hg."
 155   (when (vc-hg-root file)           ; short cut
 156     (let ((state (vc-hg-state file)))  ; expensive
 157       (and state (not (memq state '(ignored unregistered)))))))
 158
 159 (defun vc-hg-state (file)
 160   "Hg-specific version of `vc-state'."
 161   (let*
 162       ((status nil)
 163        (out
 164         (with-output-to-string
 165           (with-current-buffer
 166               standard-output
 167             (setq status
 168                   (condition-case nil
 169                       ;; Ignore all errors.
 170                       (call-process
 171                        "hg" nil t nil "--cwd" (file-name-directory file)
 172                        "status" "-A" (file-name-nondirectory file))
 173                     ;; Some problem happened.  E.g. We can't find an `hg'
 174                     ;; executable.
 175                     (error nil)))))))
 176     (when (eq 0 status)
 177         (when (null (string-match ".*: No such file or directory$" out))
 178           (let ((state (aref out 0)))
 179             (cond
 180              ((eq state ?=) 'up-to-date)
 181              ((eq state ?A) 'added)
 182              ((eq state ?M) 'edited)
 183              ((eq state ?I) 'ignored)
 184              ((eq state ?R) 'removed)
 185              ((eq state ?!) 'missing)
 186              ((eq state ??) 'unregistered)
 187              ((eq state ?C) 'up-to-date) ;; Older mercurials use this
 188              (t 'up-to-date)))))))
 189
 190 (defun vc-hg-working-revision (file)
 191   "Hg-specific version of `vc-working-revision'."
 192   (let*
 193       ((status nil)
 194        (out
 195         (with-output-to-string
 196           (with-current-buffer
 197               standard-output
 198             (setq status
 199                   (condition-case nil
 200                       ;; Ignore all errors.
 201                       (call-process
 202                        "hg" nil t nil "--cwd" (file-name-directory file)
 203                        "log" "-l1" (file-name-nondirectory file))
 204                     ;; Some problem happened.  E.g. We can't find an `hg'
 205                     ;; executable.
 206                     (error nil)))))))
 207     (when (eq 0 status)
 208       (if (string-match "changeset: *\\([0-9]*\\)" out)
 209           (match-string 1 out)
 210         "0"))))
 211
 212 ;;; History functions
 213
 214 (defun vc-hg-print-log (files &optional buffer)
 215   "Get change log associated with FILES."
 216   ;; `log-view-mode' needs to have the file names in order to function
 217   ;; correctly. "hg log" does not print it, so we insert it here by
 218   ;; hand.
 219
 220   ;; `vc-do-command' creates the buffer, but we need it before running
 221   ;; the command.
 222   (vc-setup-buffer buffer)
 223   ;; If the buffer exists from a previous invocation it might be
 224   ;; read-only.
 225   (let ((inhibit-read-only t))
 226     (with-current-buffer
 227         buffer
 228       (vc-hg-command buffer 0 files "log"))))
 229
 230 (defvar log-view-message-re)
 231 (defvar log-view-file-re)
 232 (defvar log-view-font-lock-keywords)
 233 (defvar log-view-per-file-logs)
 234
 235 (define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
 236   (require 'add-log) ;; we need the add-log faces
 237   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 238   (set (make-local-variable 'log-view-per-file-logs) nil)
 239   (set (make-local-variable 'log-view-message-re)
 240        "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)")
 241   (set (make-local-variable 'log-view-font-lock-keywords)
 242        (append
 243         log-view-font-lock-keywords
 244         '(
 245           ;; Handle the case:
 246           ;; user: FirstName LastName <foo@bar>
 247           ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
 248            (1 'change-log-name)
 249            (2 'change-log-email))
 250           ;; Handle the cases:
 251           ;; user: foo@bar
 252           ;; and
 253           ;; user: foo
 254           ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
 255            (1 'change-log-email))
 256           ("^date: \\(.+\\)" (1 'change-log-date))
 257           ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message))))))
 258
 259 (defun vc-hg-diff (files &optional oldvers newvers buffer)
 260   "Get a difference report using hg between two revisions of FILES."
 261   (let* ((firstfile (car files))
 262          (working (and firstfile (vc-working-revision firstfile))))
 263     (when (and (equal oldvers working) (not newvers))
 264       (setq oldvers nil))
 265     (when (and (not oldvers) newvers)
 266       (setq oldvers working))
 267     (apply #'vc-hg-command (or buffer "*vc-diff*") nil
 268            (mapcar (lambda (file) (file-name-nondirectory file)) files)
 269            "--cwd" (or (when firstfile (file-name-directory firstfile))
 270                        (expand-file-name default-directory))
 271            "diff"
 272            (append
 273             (vc-switches 'hg 'diff)
 274             (when oldvers
 275               (if newvers
 276                   (list "-r" oldvers "-r" newvers)
 277                 (list "-r" oldvers)))))))
 278
 279 (defun vc-hg-revision-table (files)
 280   (let ((default-directory (file-name-directory (car files))))
 281     (with-temp-buffer
 282       (vc-hg-command t nil files "log" "--template" "{rev} ")
 283       (split-string
 284        (buffer-substring-no-properties (point-min) (point-max))))))
 285
 286 ;; Modeled after the similar function in vc-cvs.el
 287 (defun vc-hg-revision-completion-table (files)
 288   (lexical-let ((files files)
 289                 table)
 290     (setq table (lazy-completion-table
 291                  table (lambda () (vc-hg-revision-table files))))
 292     table))
 293
 294 (defun vc-hg-annotate-command (file buffer &optional revision)
 295   "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
 296 Optional arg REVISION is a revision to annotate from."
 297   (vc-hg-command buffer 0 file "annotate" "-d" "-n"
 298                  (when revision (concat "-r" revision)))
 299   (with-current-buffer buffer
 300     (goto-char (point-min))
 301     (re-search-forward "^[ \t]*[0-9]")
 302     (delete-region (point-min) (match-beginning 0))))
 303
 304 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 305
 306 ;; The format for one line output by "hg annotate -d -n" looks like this:
 307 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
 308 ;; i.e: VERSION_NUMBER DATE: CONTENTS
 309 ;; If the user has set the "--follow" option, the output looks like:
 310 ;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
 311 ;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
 312 (defconst vc-hg-annotate-re
 313   "^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)[^:\n]*\\(:[^ \n][^:\n]*\\)*: ")
 314
 315 (defun vc-hg-annotate-time ()
 316   (when (looking-at vc-hg-annotate-re)
 317     (goto-char (match-end 0))
 318     (vc-annotate-convert-time
 319      (date-to-time (match-string-no-properties 2)))))
 320
 321 (defun vc-hg-annotate-extract-revision-at-line ()
 322   (save-excursion
 323     (beginning-of-line)
 324     (when (looking-at vc-hg-annotate-re) (match-string-no-properties 1))))
 325
 326 (defun vc-hg-previous-revision (file rev)
 327   (let ((newrev (1- (string-to-number rev))))
 328     (when (>= newrev 0)
 329       (number-to-string newrev))))
 330
 331 (defun vc-hg-next-revision (file rev)
 332   (let ((newrev (1+ (string-to-number rev)))
 333         (tip-revision
 334          (with-temp-buffer
 335            (vc-hg-command t 0 nil "tip")
 336            (goto-char (point-min))
 337            (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
 338            (string-to-number (match-string-no-properties 1)))))
 339     ;; We don't want to exceed the maximum possible revision number, ie
 340     ;; the tip revision.
 341     (when (<= newrev tip-revision)
 342       (number-to-string newrev))))
 343
 344 ;; Modeled after the similar function in vc-bzr.el
 345 (defun vc-hg-delete-file (file)
 346   "Delete FILE and delete it in the hg repository."
 347   (condition-case ()
 348       (delete-file file)
 349     (file-error nil))
 350   (vc-hg-command nil 0 file "remove" "--after" "--force"))
 351
 352 ;; Modeled after the similar function in vc-bzr.el
 353 (defun vc-hg-rename-file (old new)
 354   "Rename file from OLD to NEW using `hg mv'."
 355   (vc-hg-command nil 0 new "mv" old))
 356
 357 (defun vc-hg-register (files &optional rev comment)
 358   "Register FILES under hg.
 359 REV is ignored.
 360 COMMENT is ignored."
 361   (vc-hg-command nil 0 files "add"))
 362
 363 (defun vc-hg-create-repo ()
 364   "Create a new Mercurial repository."
 365   (vc-hg-command nil 0 nil "init"))
 366
 367 (defalias 'vc-hg-responsible-p 'vc-hg-root)
 368
 369 ;; Modeled after the similar function in vc-bzr.el
 370 (defun vc-hg-could-register (file)
 371   "Return non-nil if FILE could be registered under hg."
 372   (and (vc-hg-responsible-p file)      ; shortcut
 373        (condition-case ()
 374            (with-temp-buffer
 375              (vc-hg-command t nil file "add" "--dry-run"))
 376              ;; The command succeeds with no output if file is
 377              ;; registered.
 378          (error))))
 379
 380 ;; FIXME: This would remove the file. Is that correct?
 381 ;; (defun vc-hg-unregister (file)
 382 ;;   "Unregister FILE from hg."
 383 ;;   (vc-hg-command nil nil file "remove"))
 384
 385 (defun vc-hg-checkin (files rev comment)
 386   "Hg-specific version of `vc-backend-checkin'.
 387 REV is ignored."
 388   (vc-hg-command nil 0 files  "commit" "-m" comment))
 389
 390 (defun vc-hg-find-revision (file rev buffer)
 391   (let ((coding-system-for-read 'binary)
 392         (coding-system-for-write 'binary))
 393     (if rev
 394         (vc-hg-command buffer 0 file "cat" "-r" rev)
 395       (vc-hg-command buffer 0 file "cat"))))
 396
 397 ;; Modeled after the similar function in vc-bzr.el
 398 (defun vc-hg-checkout (file &optional editable rev)
 399   "Retrieve a revision of FILE.
 400 EDITABLE is ignored.
 401 REV is the revision to check out into WORKFILE."
 402   (let ((coding-system-for-read 'binary)
 403         (coding-system-for-write 'binary))
 404   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 405     (if rev
 406         (vc-hg-command t 0 file "cat" "-r" rev)
 407       (vc-hg-command t 0 file "cat")))))
 408
 409 ;; Modeled after the similar function in vc-bzr.el
 410 (defun vc-hg-workfile-unchanged-p (file)
 411   (eq 'up-to-date (vc-hg-state file)))
 412
 413 ;; Modeled after the similar function in vc-bzr.el
 414 (defun vc-hg-revert (file &optional contents-done)
 415   (unless contents-done
 416     (with-temp-buffer (vc-hg-command t 0 file "revert"))))
 417
 418 ;;; Hg specific functionality.
 419
 420 (defvar vc-hg-extra-menu-map
 421   (let ((map (make-sparse-keymap)))
 422     (define-key map [incoming] '(menu-item "Show incoming" vc-hg-incoming))
 423     (define-key map [outgoing] '(menu-item "Show outgoing" vc-hg-outgoing))
 424     map))
 425
 426 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
 427
 428 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
 429
 430 (define-derived-mode vc-hg-outgoing-mode vc-hg-log-view-mode "Hg-Outgoing")
 431
 432 (define-derived-mode vc-hg-incoming-mode vc-hg-log-view-mode "Hg-Incoming")
 433
 434 (defstruct (vc-hg-extra-fileinfo
 435             (:copier nil)
 436             (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
 437             (:conc-name vc-hg-extra-fileinfo->))
 438   rename-state        ;; rename or copy state
 439   extra-name)         ;; original name for copies and rename targets, new name for
 440
 441 (declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
 442
 443 (defun vc-hg-dir-printer (info)
 444   "Pretty-printer for the vc-dir-fileinfo structure."
 445   (let ((extra (vc-dir-fileinfo->extra info)))
 446     (vc-default-dir-printer 'Hg info)
 447     (when extra
 448       (insert (propertize
 449                (format "   (%s %s)"
 450                        (case (vc-hg-extra-fileinfo->rename-state extra)
 451                          ('copied "copied from")
 452                          ('renamed-from "renamed from")
 453                          ('renamed-to "renamed to"))
 454                        (vc-hg-extra-fileinfo->extra-name extra))
 455                'face 'font-lock-comment-face)))))
 456
 457 (defun vc-hg-after-dir-status (update-function)
 458   (let ((status-char nil)
 459         (file nil)
 460         (translation '((?= . up-to-date)
 461                        (?C . up-to-date)
 462                        (?A . added)
 463                        (?R . removed)
 464                        (?M . edited)
 465                        (?I . ignored)
 466                        (?! . missing)
 467                        (?  . copy-rename-line)
 468                        (?? . unregistered)))
 469         (translated nil)
 470         (result nil)
 471         (last-added nil)
 472         (last-line-copy nil))
 473       (goto-char (point-min))
 474       (while (not (eobp))
 475         (setq translated (cdr (assoc (char-after) translation)))
 476         (setq file
 477               (buffer-substring-no-properties (+ (point) 2)
 478                                               (line-end-position)))
 479         (cond ((not translated)
 480                (setq last-line-copy nil))
 481               ((eq translated 'up-to-date)
 482                (setq last-line-copy nil))
 483               ((eq translated 'copy-rename-line)
 484                ;; For copied files the output looks like this:
 485                ;; A COPIED_FILE_NAME
 486                ;;   ORIGINAL_FILE_NAME
 487                (setf (nth 2 last-added)
 488                      (vc-hg-create-extra-fileinfo 'copied file))
 489                (setq last-line-copy t))
 490               ((and last-line-copy (eq translated 'removed))
 491                ;; For renamed files the output looks like this:
 492                ;; A NEW_FILE_NAME
 493                ;;   ORIGINAL_FILE_NAME
 494                ;; R ORIGINAL_FILE_NAME
 495                ;; We need to adjust the previous entry to not think it is a copy.
 496                (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
 497                      'renamed-from)
 498                (push (list file translated
 499                            (vc-hg-create-extra-fileinfo
 500                             'renamed-to (nth 0 last-added))) result)
 501                (setq last-line-copy nil))
 502               (t
 503                (setq last-added (list file translated nil))
 504                (push last-added result)
 505                (setq last-line-copy nil)))
 506         (forward-line))
 507       (funcall update-function result)))
 508
 509 (defun vc-hg-dir-status (dir update-function)
 510   (vc-hg-command (current-buffer) 'async dir "status" "-C")
 511   (vc-exec-after
 512    `(vc-hg-after-dir-status (quote ,update-function))))
 513
 514 (defun vc-hg-dir-status-files (dir files default-state update-function)
 515   (apply 'vc-hg-command (current-buffer) 'async dir "status" "-C" files)
 516   (vc-exec-after
 517    `(vc-hg-after-dir-status (quote ,update-function))))
 518
 519 (defun vc-hg-dir-extra-header (name &rest commands)
 520   (concat (propertize name 'face 'font-lock-type-face)
 521           (propertize
 522            (with-temp-buffer
 523              (apply 'vc-hg-command (current-buffer) 0 nil commands)
 524              (buffer-substring-no-properties (point-min) (1- (point-max))))
 525            'face 'font-lock-variable-name-face)))
 526
 527 (defun vc-hg-dir-extra-headers (dir)
 528   "Generate extra status headers for a Mercurial tree."
 529   (let ((default-directory dir))
 530     (concat
 531      (vc-hg-dir-extra-header "Root       : " "root") "\n"
 532      (vc-hg-dir-extra-header "Branch     : " "id" "-b") "\n"
 533      (vc-hg-dir-extra-header "Tags       : " "id" "-t") ; "\n"
 534      ;; these change after each commit
 535      ;; (vc-hg-dir-extra-header "Local num  : " "id" "-n") "\n"
 536      ;; (vc-hg-dir-extra-header "Global id  : " "id" "-i")
 537      )))
 538
 539 ;; FIXME: this adds another top level menu, instead figure out how to
 540 ;; replace the Log-View menu.
 541 (easy-menu-define log-view-mode-menu vc-hg-outgoing-mode-map
 542   "Hg-outgoing Display Menu"
 543   `("Hg-outgoing"
 544     ["Push selected"  vc-hg-push]))
 545
 546 (easy-menu-define log-view-mode-menu vc-hg-incoming-mode-map
 547   "Hg-incoming Display Menu"
 548   `("Hg-incoming"
 549     ["Pull selected"  vc-hg-pull]))
 550
 551 (defun vc-hg-outgoing ()
 552   (interactive)
 553   (let ((bname "*Hg outgoing*"))
 554     (vc-hg-command bname 0 nil "outgoing" "-n")
 555     (pop-to-buffer bname)
 556     (vc-hg-outgoing-mode)))
 557
 558 (defun vc-hg-incoming ()
 559   (interactive)
 560   (let ((bname "*Hg incoming*"))
 561     (vc-hg-command bname 0 nil "incoming" "-n")
 562     (pop-to-buffer bname)
 563     (vc-hg-incoming-mode)))
 564
 565 (declare-function log-view-get-marked "log-view" ())
 566
 567 ;; XXX maybe also add key bindings for these functions.
 568 (defun vc-hg-push ()
 569   (interactive)
 570   (let ((marked-list (log-view-get-marked)))
 571     (if marked-list
 572         (vc-hg-command
 573          nil 0 nil
 574          (cons "push"
 575                (apply 'nconc
 576                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 577          (error "No log entries selected for push"))))
 578
 579 (defun vc-hg-pull ()
 580   (interactive)
 581   (let ((marked-list (log-view-get-marked)))
 582     (if marked-list
 583         (vc-hg-command
 584          nil 0 nil
 585          (cons "pull"
 586                (apply 'nconc
 587                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 588       (error "No log entries selected for pull"))))
 589
 590 ;;; Internal functions
 591
 592 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
 593   "A wrapper around `vc-do-command' for use in vc-hg.el.
 594 The difference to vc-do-command is that this function always invokes `hg',
 595 and that it passes `vc-hg-global-switches' to it before FLAGS."
 596   (apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
 597          (if (stringp vc-hg-global-switches)
 598              (cons vc-hg-global-switches flags)
 599            (append vc-hg-global-switches
 600                    flags))))
 601
 602 (defun vc-hg-root (file)
 603   (vc-find-root file ".hg"))
 604
 605 (provide 'vc-hg)
 606
 607 ;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
 608 ;;; vc-hg.el ends here