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"
 124              :value ("")
 125              string))
 126   :version "22.2"
 127   :group 'vc)
 128
 129 \f
 130 ;;; Properties of the backend
 131
 132 (defun vc-hg-revision-granularity () 'repository)
 133 (defun vc-hg-checkout-model (files) 'implicit)
 134
 135 ;;; State querying functions
 136
 137 ;;;###autoload (defun vc-hg-registered (file)
 138 ;;;###autoload   "Return non-nil if FILE is registered with hg."
 139 ;;;###autoload   (if (vc-find-root file ".hg")       ; short cut
 140 ;;;###autoload       (progn
 141 ;;;###autoload         (load "vc-hg")
 142 ;;;###autoload         (vc-hg-registered file))))
 143
 144 ;; Modeled after the similar function in vc-bzr.el
 145 (defun vc-hg-registered (file)
 146   "Return non-nil if FILE is registered with hg."
 147   (when (vc-hg-root file)           ; short cut
 148     (let ((state (vc-hg-state file)))  ; expensive
 149       (and state (not (memq state '(ignored unregistered)))))))
 150
 151 (defun vc-hg-state (file)
 152   "Hg-specific version of `vc-state'."
 153   (let*
 154       ((status nil)
 155        (out
 156         (with-output-to-string
 157           (with-current-buffer
 158               standard-output
 159             (setq status
 160                   (condition-case nil
 161                       ;; Ignore all errors.
 162                       (call-process
 163                        "hg" nil t nil "--cwd" (file-name-directory file)
 164                        "status" "-A" (file-name-nondirectory file))
 165                     ;; Some problem happened.  E.g. We can't find an `hg'
 166                     ;; executable.
 167                     (error nil)))))))
 168     (when (eq 0 status)
 169         (when (null (string-match ".*: No such file or directory$" out))
 170           (let ((state (aref out 0)))
 171             (cond
 172              ((eq state ?=) 'up-to-date)
 173              ((eq state ?A) 'added)
 174              ((eq state ?M) 'edited)
 175              ((eq state ?I) 'ignored)
 176              ((eq state ?R) 'removed)
 177              ((eq state ?!) 'missing)
 178              ((eq state ??) 'unregistered)
 179              ((eq state ?C) 'up-to-date) ;; Older mercurials use this
 180              (t 'up-to-date)))))))
 181
 182 (defun vc-hg-working-revision (file)
 183   "Hg-specific version of `vc-working-revision'."
 184   (let*
 185       ((status nil)
 186        (out
 187         (with-output-to-string
 188           (with-current-buffer
 189               standard-output
 190             (setq status
 191                   (condition-case nil
 192                       ;; Ignore all errors.
 193                       (call-process
 194                        "hg" nil t nil "--cwd" (file-name-directory file)
 195                        "log" "-l1" (file-name-nondirectory file))
 196                     ;; Some problem happened.  E.g. We can't find an `hg'
 197                     ;; executable.
 198                     (error nil)))))))
 199     (when (eq 0 status)
 200       (if (string-match "changeset: *\\([0-9]*\\)" out)
 201           (match-string 1 out)
 202         "0"))))
 203
 204 ;;; History functions
 205
 206 (defun vc-hg-print-log (files &optional buffer)
 207   "Get change log associated with FILES."
 208   ;; `log-view-mode' needs to have the file names in order to function
 209   ;; correctly. "hg log" does not print it, so we insert it here by
 210   ;; hand.
 211
 212   ;; `vc-do-command' creates the buffer, but we need it before running
 213   ;; the command.
 214   (vc-setup-buffer buffer)
 215   ;; If the buffer exists from a previous invocation it might be
 216   ;; read-only.
 217   (let ((inhibit-read-only t))
 218     (with-current-buffer
 219         buffer
 220       (vc-hg-command buffer 0 files "log"))))
 221
 222 (defvar log-view-message-re)
 223 (defvar log-view-file-re)
 224 (defvar log-view-font-lock-keywords)
 225 (defvar log-view-per-file-logs)
 226
 227 (define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
 228   (require 'add-log) ;; we need the add-log faces
 229   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 230   (set (make-local-variable 'log-view-per-file-logs) nil)
 231   (set (make-local-variable 'log-view-message-re)
 232        "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)")
 233   (set (make-local-variable 'log-view-font-lock-keywords)
 234        (append
 235         log-view-font-lock-keywords
 236         '(
 237           ;; Handle the case:
 238           ;; user: FirstName LastName <foo@bar>
 239           ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
 240            (1 'change-log-name)
 241            (2 'change-log-email))
 242           ;; Handle the cases:
 243           ;; user: foo@bar
 244           ;; and
 245           ;; user: foo
 246           ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
 247            (1 'change-log-email))
 248           ("^date: \\(.+\\)" (1 'change-log-date))
 249           ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message))))))
 250
 251 (defun vc-hg-diff (files &optional oldvers newvers buffer)
 252   "Get a difference report using hg between two revisions of FILES."
 253   (let* ((firstfile (car files))
 254          (working (and firstfile (vc-working-revision firstfile))))
 255     (when (and (equal oldvers working) (not newvers))
 256       (setq oldvers nil))
 257     (when (and (not oldvers) newvers)
 258       (setq oldvers working))
 259     (apply #'vc-hg-command (or buffer "*vc-diff*") nil
 260            (mapcar (lambda (file) (file-name-nondirectory file)) files)
 261            "--cwd" (or (when firstfile (file-name-directory firstfile))
 262                        (expand-file-name default-directory))
 263            "diff"
 264            (append
 265             (when oldvers
 266               (if newvers
 267                   (list "-r" oldvers "-r" newvers)
 268                 (list "-r" oldvers)))))))
 269
 270 (defun vc-hg-revision-table (files)
 271   (let ((default-directory (file-name-directory (car files))))
 272     (with-temp-buffer
 273       (vc-hg-command t nil files "log" "--template" "{rev} ")
 274       (split-string
 275        (buffer-substring-no-properties (point-min) (point-max))))))
 276
 277 ;; Modeled after the similar function in vc-cvs.el
 278 (defun vc-hg-revision-completion-table (files)
 279   (lexical-let ((files files)
 280                 table)
 281     (setq table (lazy-completion-table
 282                  table (lambda () (vc-hg-revision-table files))))
 283     table))
 284
 285 (defun vc-hg-annotate-command (file buffer &optional revision)
 286   "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
 287 Optional arg REVISION is a revision to annotate from."
 288   (vc-hg-command buffer 0 file "annotate" "-d" "-n"
 289                  (when revision (concat "-r" revision)))
 290   (with-current-buffer buffer
 291     (goto-char (point-min))
 292     (re-search-forward "^[ \t]*[0-9]")
 293     (delete-region (point-min) (match-beginning 0))))
 294
 295 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 296
 297 ;; The format for one line output by "hg annotate -d -n" looks like this:
 298 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
 299 ;; i.e: VERSION_NUMBER DATE: CONTENTS
 300 ;; If the user has set the "--follow" option, the output looks like:
 301 ;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
 302 ;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
 303 (defconst vc-hg-annotate-re
 304   "^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)[^:\n]*\\(:[^ \n][^:\n]*\\)*: ")
 305
 306 (defun vc-hg-annotate-time ()
 307   (when (looking-at vc-hg-annotate-re)
 308     (goto-char (match-end 0))
 309     (vc-annotate-convert-time
 310      (date-to-time (match-string-no-properties 2)))))
 311
 312 (defun vc-hg-annotate-extract-revision-at-line ()
 313   (save-excursion
 314     (beginning-of-line)
 315     (when (looking-at vc-hg-annotate-re) (match-string-no-properties 1))))
 316
 317 (defun vc-hg-previous-revision (file rev)
 318   (let ((newrev (1- (string-to-number rev))))
 319     (when (>= newrev 0)
 320       (number-to-string newrev))))
 321
 322 (defun vc-hg-next-revision (file rev)
 323   (let ((newrev (1+ (string-to-number rev)))
 324         (tip-revision
 325          (with-temp-buffer
 326            (vc-hg-command t 0 nil "tip")
 327            (goto-char (point-min))
 328            (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
 329            (string-to-number (match-string-no-properties 1)))))
 330     ;; We don't want to exceed the maximum possible revision number, ie
 331     ;; the tip revision.
 332     (when (<= newrev tip-revision)
 333       (number-to-string newrev))))
 334
 335 ;; Modeled after the similar function in vc-bzr.el
 336 (defun vc-hg-delete-file (file)
 337   "Delete FILE and delete it in the hg repository."
 338   (condition-case ()
 339       (delete-file file)
 340     (file-error nil))
 341   (vc-hg-command nil 0 file "remove" "--after" "--force"))
 342
 343 ;; Modeled after the similar function in vc-bzr.el
 344 (defun vc-hg-rename-file (old new)
 345   "Rename file from OLD to NEW using `hg mv'."
 346   (vc-hg-command nil 0 new "mv" old))
 347
 348 (defun vc-hg-register (files &optional rev comment)
 349   "Register FILES under hg.
 350 REV is ignored.
 351 COMMENT is ignored."
 352   (vc-hg-command nil 0 files "add"))
 353
 354 (defun vc-hg-create-repo ()
 355   "Create a new Mercurial repository."
 356   (vc-hg-command nil 0 nil "init"))
 357
 358 (defalias 'vc-hg-responsible-p 'vc-hg-root)
 359
 360 ;; Modeled after the similar function in vc-bzr.el
 361 (defun vc-hg-could-register (file)
 362   "Return non-nil if FILE could be registered under hg."
 363   (and (vc-hg-responsible-p file)      ; shortcut
 364        (condition-case ()
 365            (with-temp-buffer
 366              (vc-hg-command t nil file "add" "--dry-run"))
 367              ;; The command succeeds with no output if file is
 368              ;; registered.
 369          (error))))
 370
 371 ;; FIXME: This would remove the file. Is that correct?
 372 ;; (defun vc-hg-unregister (file)
 373 ;;   "Unregister FILE from hg."
 374 ;;   (vc-hg-command nil nil file "remove"))
 375
 376 (defun vc-hg-checkin (files rev comment)
 377   "Hg-specific version of `vc-backend-checkin'.
 378 REV is ignored."
 379   (vc-hg-command nil 0 files  "commit" "-m" comment))
 380
 381 (defun vc-hg-find-revision (file rev buffer)
 382   (let ((coding-system-for-read 'binary)
 383         (coding-system-for-write 'binary))
 384     (if rev
 385         (vc-hg-command buffer 0 file "cat" "-r" rev)
 386       (vc-hg-command buffer 0 file "cat"))))
 387
 388 ;; Modeled after the similar function in vc-bzr.el
 389 (defun vc-hg-checkout (file &optional editable rev)
 390   "Retrieve a revision of FILE.
 391 EDITABLE is ignored.
 392 REV is the revision to check out into WORKFILE."
 393   (let ((coding-system-for-read 'binary)
 394         (coding-system-for-write 'binary))
 395   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 396     (if rev
 397         (vc-hg-command t 0 file "cat" "-r" rev)
 398       (vc-hg-command t 0 file "cat")))))
 399
 400 ;; Modeled after the similar function in vc-bzr.el
 401 (defun vc-hg-workfile-unchanged-p (file)
 402   (eq 'up-to-date (vc-hg-state file)))
 403
 404 ;; Modeled after the similar function in vc-bzr.el
 405 (defun vc-hg-revert (file &optional contents-done)
 406   (unless contents-done
 407     (with-temp-buffer (vc-hg-command t 0 file "revert"))))
 408
 409 ;;; Hg specific functionality.
 410
 411 (defvar vc-hg-extra-menu-map
 412   (let ((map (make-sparse-keymap)))
 413     (define-key map [incoming] '(menu-item "Show incoming" vc-hg-incoming))
 414     (define-key map [outgoing] '(menu-item "Show outgoing" vc-hg-outgoing))
 415     map))
 416
 417 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
 418
 419 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
 420
 421 (define-derived-mode vc-hg-outgoing-mode vc-hg-log-view-mode "Hg-Outgoing")
 422
 423 (define-derived-mode vc-hg-incoming-mode vc-hg-log-view-mode "Hg-Incoming")
 424
 425 (defstruct (vc-hg-extra-fileinfo
 426             (:copier nil)
 427             (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
 428             (:conc-name vc-hg-extra-fileinfo->))
 429   rename-state        ;; rename or copy state
 430   extra-name)         ;; original name for copies and rename targets, new name for
 431
 432 (declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
 433
 434 (defun vc-hg-dir-printer (info)
 435   "Pretty-printer for the vc-dir-fileinfo structure."
 436   (let ((extra (vc-dir-fileinfo->extra info)))
 437     (vc-default-dir-printer 'Hg info)
 438     (when extra
 439       (insert (propertize
 440                (format "   (%s %s)"
 441                        (case (vc-hg-extra-fileinfo->rename-state extra)
 442                          ('copied "copied from")
 443                          ('renamed-from "renamed from")
 444                          ('renamed-to "renamed to"))
 445                        (vc-hg-extra-fileinfo->extra-name extra))
 446                'face 'font-lock-comment-face)))))
 447
 448 (defun vc-hg-after-dir-status (update-function)
 449   (let ((status-char nil)
 450         (file nil)
 451         (translation '((?= . up-to-date)
 452                        (?C . up-to-date)
 453                        (?A . added)
 454                        (?R . removed)
 455                        (?M . edited)
 456                        (?I . ignored)
 457                        (?! . missing)
 458                        (?  . copy-rename-line)
 459                        (?? . unregistered)))
 460         (translated nil)
 461         (result nil)
 462         (last-added nil)
 463         (last-line-copy nil))
 464       (goto-char (point-min))
 465       (while (not (eobp))
 466         (setq translated (cdr (assoc (char-after) translation)))
 467         (setq file
 468               (buffer-substring-no-properties (+ (point) 2)
 469                                               (line-end-position)))
 470         (cond ((not translated)
 471                (setq last-line-copy nil))
 472               ((eq translated 'up-to-date)
 473                (setq last-line-copy nil))
 474               ((eq translated 'copy-rename-line)
 475                ;; For copied files the output looks like this:
 476                ;; A COPIED_FILE_NAME
 477                ;;   ORIGINAL_FILE_NAME
 478                (setf (nth 2 last-added)
 479                      (vc-hg-create-extra-fileinfo 'copied file))
 480                (setq last-line-copy t))
 481               ((and last-line-copy (eq translated 'removed))
 482                ;; For renamed files the output looks like this:
 483                ;; A NEW_FILE_NAME
 484                ;;   ORIGINAL_FILE_NAME
 485                ;; R ORIGINAL_FILE_NAME
 486                ;; We need to adjust the previous entry to not think it is a copy.
 487                (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
 488                      'renamed-from)
 489                (push (list file translated
 490                            (vc-hg-create-extra-fileinfo
 491                             'renamed-to (nth 0 last-added))) result)
 492                (setq last-line-copy nil))
 493               (t
 494                (setq last-added (list file translated nil))
 495                (push last-added result)
 496                (setq last-line-copy nil)))
 497         (forward-line))
 498       (funcall update-function result)))
 499
 500 (defun vc-hg-dir-status (dir update-function)
 501   (vc-hg-command (current-buffer) 'async dir "status" "-C")
 502   (vc-exec-after
 503    `(vc-hg-after-dir-status (quote ,update-function))))
 504
 505 (defun vc-hg-dir-status-files (dir files default-state update-function)
 506   (apply 'vc-hg-command (current-buffer) 'async dir "status" "-C" files)
 507   (vc-exec-after
 508    `(vc-hg-after-dir-status (quote ,update-function))))
 509
 510 (defun vc-hg-dir-extra-header (name &rest commands)
 511   (concat (propertize name 'face 'font-lock-type-face)
 512           (propertize
 513            (with-temp-buffer
 514              (apply 'vc-hg-command (current-buffer) 0 nil commands)
 515              (buffer-substring-no-properties (point-min) (1- (point-max))))
 516            'face 'font-lock-variable-name-face)))
 517
 518 (defun vc-hg-dir-extra-headers (dir)
 519   "Generate extra status headers for a Mercurial tree."
 520   (let ((default-directory dir))
 521     (concat
 522      (vc-hg-dir-extra-header "Root       : " "root") "\n"
 523      (vc-hg-dir-extra-header "Branch     : " "id" "-b") "\n"
 524      (vc-hg-dir-extra-header "Tags       : " "id" "-t") ; "\n"
 525      ;; these change after each commit
 526      ;; (vc-hg-dir-extra-header "Local num  : " "id" "-n") "\n"
 527      ;; (vc-hg-dir-extra-header "Global id  : " "id" "-i")
 528      )))
 529
 530 ;; FIXME: this adds another top level menu, instead figure out how to
 531 ;; replace the Log-View menu.
 532 (easy-menu-define log-view-mode-menu vc-hg-outgoing-mode-map
 533   "Hg-outgoing Display Menu"
 534   `("Hg-outgoing"
 535     ["Push selected"  vc-hg-push]))
 536
 537 (easy-menu-define log-view-mode-menu vc-hg-incoming-mode-map
 538   "Hg-incoming Display Menu"
 539   `("Hg-incoming"
 540     ["Pull selected"  vc-hg-pull]))
 541
 542 (defun vc-hg-outgoing ()
 543   (interactive)
 544   (let ((bname "*Hg outgoing*"))
 545     (vc-hg-command bname 0 nil "outgoing" "-n")
 546     (pop-to-buffer bname)
 547     (vc-hg-outgoing-mode)))
 548
 549 (defun vc-hg-incoming ()
 550   (interactive)
 551   (let ((bname "*Hg incoming*"))
 552     (vc-hg-command bname 0 nil "incoming" "-n")
 553     (pop-to-buffer bname)
 554     (vc-hg-incoming-mode)))
 555
 556 (declare-function log-view-get-marked "log-view" ())
 557
 558 ;; XXX maybe also add key bindings for these functions.
 559 (defun vc-hg-push ()
 560   (interactive)
 561   (let ((marked-list (log-view-get-marked)))
 562     (if marked-list
 563         (vc-hg-command
 564          nil 0 nil
 565          (cons "push"
 566                (apply 'nconc
 567                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 568          (error "No log entries selected for push"))))
 569
 570 (defun vc-hg-pull ()
 571   (interactive)
 572   (let ((marked-list (log-view-get-marked)))
 573     (if marked-list
 574         (vc-hg-command
 575          nil 0 nil
 576          (cons "pull"
 577                (apply 'nconc
 578                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 579       (error "No log entries selected for pull"))))
 580
 581 ;;; Internal functions
 582
 583 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
 584   "A wrapper around `vc-do-command' for use in vc-hg.el.
 585 The difference to vc-do-command is that this function always invokes `hg',
 586 and that it passes `vc-hg-global-switches' to it before FLAGS."
 587   (apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
 588          (if (stringp vc-hg-global-switches)
 589              (cons vc-hg-global-switches flags)
 590            (append vc-hg-global-switches
 591                    flags))))
 592
 593 (defun vc-hg-root (file)
 594   (vc-find-root file ".hg"))
 595
 596 (provide 'vc-hg)
 597
 598 ;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
 599 ;;; vc-hg.el ends here