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