lisp/vc-hg.el

   1 ;;; vc-hg.el --- VC backend for the mercurial version control system
   2
   3 ;; Copyright (C) 2006, 2007, 2008, 2009, 2010 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 buffer &optional shortlog start-revision limit) 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
  96 ;; 2) Implement Stefan Monnier's advice:
  97 ;; vc-hg-registered and vc-hg-state
  98 ;; Both of those functions should be super extra careful to fail gracefully in
  99 ;; unexpected circumstances. The reason this is important is that any error
 100 ;; there will prevent the user from even looking at the file :-(
 101 ;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
 102 ;; mercurial's control and extracting the current revision should be done
 103 ;; without even using `hg' (this way even if you don't have `hg' installed,
 104 ;; Emacs is able to tell you this file is under mercurial's control).
 105
 106 ;;; History:
 107 ;;
 108
 109 ;;; Code:
 110
 111 (eval-when-compile
 112   (require 'cl)
 113   (require 'vc)
 114   (require 'vc-dir))
 115
 116 ;;; Customization options
 117
 118 (defcustom vc-hg-global-switches nil
 119   "Global switches to pass to any Hg command."
 120   :type '(choice (const :tag "None" nil)
 121          (string :tag "Argument String")
 122          (repeat :tag "Argument List" :value ("") string))
 123   :version "22.2"
 124   :group 'vc)
 125
 126 (defcustom vc-hg-diff-switches t ; Hg doesn't support common args like -u
 127   "String or list of strings specifying switches for Hg diff under VC.
 128 If nil, use the value of `vc-diff-switches'.  If t, use no switches."
 129   :type '(choice (const :tag "Unspecified" nil)
 130                  (const :tag "None" t)
 131                  (string :tag "Argument String")
 132                  (repeat :tag "Argument List" :value ("") string))
 133   :version "23.1"
 134   :group 'vc)
 135
 136 \f
 137 ;;; Properties of the backend
 138
 139 (defun vc-hg-revision-granularity () 'repository)
 140 (defun vc-hg-checkout-model (files) 'implicit)
 141
 142 ;;; State querying functions
 143
 144 ;;;###autoload (defun vc-hg-registered (file)
 145 ;;;###autoload   "Return non-nil if FILE is registered with hg."
 146 ;;;###autoload   (if (vc-find-root file ".hg")       ; short cut
 147 ;;;###autoload       (progn
 148 ;;;###autoload         (load "vc-hg")
 149 ;;;###autoload         (vc-hg-registered file))))
 150
 151 ;; Modeled after the similar function in vc-bzr.el
 152 (defun vc-hg-registered (file)
 153   "Return non-nil if FILE is registered with hg."
 154   (when (vc-hg-root file)           ; short cut
 155     (let ((state (vc-hg-state file)))  ; expensive
 156       (and state (not (memq state '(ignored unregistered)))))))
 157
 158 (defun vc-hg-state (file)
 159   "Hg-specific version of `vc-state'."
 160   (let*
 161       ((status nil)
 162        (default-directory (file-name-directory file))
 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                       (let ((process-environment
 171                              ;; Avoid localization of messages so we
 172                              ;; can parse the output.
 173                              (append (list "TERM=dumb" "LANGUAGE=C" "HGRCPATH=")
 174                                      process-environment)))
 175                         (process-file
 176                          "hg" nil t nil
 177                          "status" "-A" (file-relative-name file)))
 178                     ;; Some problem happened.  E.g. We can't find an `hg'
 179                     ;; executable.
 180                     (error nil)))))))
 181     (when (eq 0 status)
 182         (when (null (string-match ".*: No such file or directory$" out))
 183           (let ((state (aref out 0)))
 184             (cond
 185              ((eq state ?=) 'up-to-date)
 186              ((eq state ?A) 'added)
 187              ((eq state ?M) 'edited)
 188              ((eq state ?I) 'ignored)
 189              ((eq state ?R) 'removed)
 190              ((eq state ?!) 'missing)
 191              ((eq state ??) 'unregistered)
 192              ((eq state ?C) 'up-to-date) ;; Older mercurials use this
 193              (t 'up-to-date)))))))
 194
 195 (defun vc-hg-working-revision (file)
 196   "Hg-specific version of `vc-working-revision'."
 197   (let*
 198       ((status nil)
 199        (default-directory (file-name-directory file))
 200        ;; Avoid localization of messages so we can parse the output.
 201        (avoid-local-env (append (list "TERM=dumb" "LANGUAGE=C" "HGRCPATH=")
 202                                      process-environment))
 203        (out
 204         (with-output-to-string
 205           (with-current-buffer
 206               standard-output
 207             (setq status
 208                   (condition-case nil
 209                       (let ((process-environment avoid-local-env))
 210                         ;; Ignore all errors.
 211                         (process-file
 212                          "hg" nil t nil
 213                          "parents" "--template" "{rev}" (file-relative-name file)))
 214                     ;; Some problem happened.  E.g. We can't find an `hg'
 215                     ;; executable.
 216                     (error nil)))))))
 217     (if (eq 0 status)
 218         out
 219       ;; Check if the file is in the 'added state, the above hg
 220       ;; command does not distinguish between 'added and 'unregistered.
 221       (setq status
 222             (condition-case nil
 223                 (let ((process-environment avoid-local-env))
 224                   (process-file
 225                    "hg" nil nil nil
 226                    ;; We use "log" here, if there's a faster command
 227                    ;; that returns true for an 'added file and false
 228                    ;; for an 'unregistered one, we could use that.
 229                    "log" "-l1" (file-relative-name file)))
 230               ;; Some problem happened.  E.g. We can't find an `hg'
 231               ;; executable.
 232               (error nil)))
 233       (when (eq 0 status) "0"))))
 234
 235 ;;; History functions
 236
 237 (defcustom vc-hg-log-switches nil
 238   "String or list of strings specifying switches for hg log under VC."
 239   :type '(choice (const :tag "None" nil)
 240                  (string :tag "Argument String")
 241                  (repeat :tag "Argument List" :value ("") string))
 242   :group 'vc-hg)
 243
 244 (defun vc-hg-print-log (files buffer &optional shortlog start-revision limit)
 245   "Get change log associated with FILES."
 246   ;; `vc-do-command' creates the buffer, but we need it before running
 247   ;; the command.
 248   (vc-setup-buffer buffer)
 249   ;; If the buffer exists from a previous invocation it might be
 250   ;; read-only.
 251   (let ((inhibit-read-only t))
 252     (with-current-buffer
 253         buffer
 254       (apply 'vc-hg-command buffer 0 files "log"
 255              (nconc
 256               (when start-revision (list (format "-r%s:" start-revision)))
 257               (when limit (list "-l" (format "%s" limit)))
 258               (when shortlog (list "--style" "compact"))
 259               vc-hg-log-switches)))))
 260
 261 (defvar log-view-message-re)
 262 (defvar log-view-file-re)
 263 (defvar log-view-font-lock-keywords)
 264 (defvar log-view-per-file-logs)
 265
 266 (define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
 267   (require 'add-log) ;; we need the add-log faces
 268   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 269   (set (make-local-variable 'log-view-per-file-logs) nil)
 270   (set (make-local-variable 'log-view-message-re)
 271        (if (eq vc-log-view-type 'short)
 272            "^\\([0-9]+\\)\\(\\[.*\\]\\)? +\\([0-9a-z]\\{12\\}\\) +\\(\\(?:[0-9]+\\)-\\(?:[0-9]+\\)-\\(?:[0-9]+\\) \\(?:[0-9]+\\):\\(?:[0-9]+\\) \\(?:[-+0-9]+\\)\\) +\\(.*\\)$"
 273          "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)"))
 274   (set (make-local-variable 'log-view-font-lock-keywords)
 275        (if (eq vc-log-view-type 'short)
 276            (append `((,log-view-message-re
 277                       (1 'log-view-message-face)
 278                       (2 'highlight nil lax)
 279                       (3 'log-view-message-face)
 280                       (4 'change-log-date)
 281                       (5 'change-log-name))))
 282        (append
 283         log-view-font-lock-keywords
 284         '(
 285           ;; Handle the case:
 286           ;; user: FirstName LastName <foo@bar>
 287           ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
 288            (1 'change-log-name)
 289            (2 'change-log-email))
 290           ;; Handle the cases:
 291           ;; user: foo@bar
 292           ;; and
 293           ;; user: foo
 294           ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
 295            (1 'change-log-email))
 296           ("^date: \\(.+\\)" (1 'change-log-date))
 297           ("^tag: +\\([^ ]+\\)$" (1 'highlight))
 298           ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message)))))))
 299
 300 (declare-function log-edit-extract-headers "log-edit" (headers string))
 301
 302 (defun vc-hg-diff (files &optional oldvers newvers buffer)
 303   "Get a difference report using hg between two revisions of FILES."
 304   (let* ((firstfile (car files))
 305          (working (and firstfile (vc-working-revision firstfile))))
 306     (when (and (equal oldvers working) (not newvers))
 307       (setq oldvers nil))
 308     (when (and (not oldvers) newvers)
 309       (setq oldvers working))
 310     (apply #'vc-hg-command (or buffer "*vc-diff*") nil files "diff"
 311            (append
 312             (vc-switches 'hg 'diff)
 313             (when oldvers
 314               (if newvers
 315                   (list "-r" oldvers "-r" newvers)
 316                 (list "-r" oldvers)))))))
 317
 318 (defun vc-hg-revision-table (files)
 319   (let ((default-directory (file-name-directory (car files))))
 320     (with-temp-buffer
 321       (vc-hg-command t nil files "log" "--template" "{rev} ")
 322       (split-string
 323        (buffer-substring-no-properties (point-min) (point-max))))))
 324
 325 ;; Modeled after the similar function in vc-cvs.el
 326 (defun vc-hg-revision-completion-table (files)
 327   (lexical-let ((files files)
 328                 table)
 329     (setq table (lazy-completion-table
 330                  table (lambda () (vc-hg-revision-table files))))
 331     table))
 332
 333 (defun vc-hg-annotate-command (file buffer &optional revision)
 334   "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
 335 Optional arg REVISION is a revision to annotate from."
 336   (vc-hg-command buffer 0 file "annotate" "-d" "-n" "--follow"
 337                  (when revision (concat "-r" revision))))
 338
 339 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 340
 341 ;; The format for one line output by "hg annotate -d -n" looks like this:
 342 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
 343 ;; i.e: VERSION_NUMBER DATE: CONTENTS
 344 ;; If the user has set the "--follow" option, the output looks like:
 345 ;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
 346 ;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
 347 (defconst vc-hg-annotate-re
 348   "^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)\\(?:\\(: \\)\\|\\(?: +\\(.+\\): \\)\\)")
 349
 350 (defun vc-hg-annotate-time ()
 351   (when (looking-at vc-hg-annotate-re)
 352     (goto-char (match-end 0))
 353     (vc-annotate-convert-time
 354      (date-to-time (match-string-no-properties 2)))))
 355
 356 (defun vc-hg-annotate-extract-revision-at-line ()
 357   (save-excursion
 358     (beginning-of-line)
 359     (when (looking-at vc-hg-annotate-re)
 360       (if (match-beginning 3)
 361           (match-string-no-properties 1)
 362         (cons (match-string-no-properties 1)
 363               (expand-file-name (match-string-no-properties 4)
 364                                 (vc-hg-root default-directory)))))))
 365
 366 (defun vc-hg-previous-revision (file rev)
 367   (let ((newrev (1- (string-to-number rev))))
 368     (when (>= newrev 0)
 369       (number-to-string newrev))))
 370
 371 (defun vc-hg-next-revision (file rev)
 372   (let ((newrev (1+ (string-to-number rev)))
 373         (tip-revision
 374          (with-temp-buffer
 375            (vc-hg-command t 0 nil "tip")
 376            (goto-char (point-min))
 377            (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
 378            (string-to-number (match-string-no-properties 1)))))
 379     ;; We don't want to exceed the maximum possible revision number, ie
 380     ;; the tip revision.
 381     (when (<= newrev tip-revision)
 382       (number-to-string newrev))))
 383
 384 ;; Modeled after the similar function in vc-bzr.el
 385 (defun vc-hg-delete-file (file)
 386   "Delete FILE and delete it in the hg repository."
 387   (condition-case ()
 388       (delete-file file)
 389     (file-error nil))
 390   (vc-hg-command nil 0 file "remove" "--after" "--force"))
 391
 392 ;; Modeled after the similar function in vc-bzr.el
 393 (defun vc-hg-rename-file (old new)
 394   "Rename file from OLD to NEW using `hg mv'."
 395   (vc-hg-command nil 0 new "mv" old))
 396
 397 (defun vc-hg-register (files &optional rev comment)
 398   "Register FILES under hg.
 399 REV is ignored.
 400 COMMENT is ignored."
 401   (vc-hg-command nil 0 files "add"))
 402
 403 (defun vc-hg-create-repo ()
 404   "Create a new Mercurial repository."
 405   (vc-hg-command nil 0 nil "init"))
 406
 407 (defalias 'vc-hg-responsible-p 'vc-hg-root)
 408
 409 ;; Modeled after the similar function in vc-bzr.el
 410 (defun vc-hg-could-register (file)
 411   "Return non-nil if FILE could be registered under hg."
 412   (and (vc-hg-responsible-p file)      ; shortcut
 413        (condition-case ()
 414            (with-temp-buffer
 415              (vc-hg-command t nil file "add" "--dry-run"))
 416              ;; The command succeeds with no output if file is
 417              ;; registered.
 418          (error))))
 419
 420 ;; FIXME: This would remove the file. Is that correct?
 421 ;; (defun vc-hg-unregister (file)
 422 ;;   "Unregister FILE from hg."
 423 ;;   (vc-hg-command nil nil file "remove"))
 424
 425 (declare-function log-edit-extract-headers "log-edit" (headers string))
 426
 427 (defun vc-hg-checkin (files rev comment)
 428   "Hg-specific version of `vc-backend-checkin'.
 429 REV is ignored."
 430   (apply 'vc-hg-command nil 0 files
 431          (nconc (list "commit" "-m")
 432                 (log-edit-extract-headers '(("Author" . "--user"))
 433                                           comment))))
 434
 435 (defun vc-hg-find-revision (file rev buffer)
 436   (let ((coding-system-for-read 'binary)
 437         (coding-system-for-write 'binary))
 438     (if rev
 439         (vc-hg-command buffer 0 file "cat" "-r" rev)
 440       (vc-hg-command buffer 0 file "cat"))))
 441
 442 ;; Modeled after the similar function in vc-bzr.el
 443 (defun vc-hg-checkout (file &optional editable rev)
 444   "Retrieve a revision of FILE.
 445 EDITABLE is ignored.
 446 REV is the revision to check out into WORKFILE."
 447   (let ((coding-system-for-read 'binary)
 448         (coding-system-for-write 'binary))
 449   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 450     (if rev
 451         (vc-hg-command t 0 file "cat" "-r" rev)
 452       (vc-hg-command t 0 file "cat")))))
 453
 454 ;; Modeled after the similar function in vc-bzr.el
 455 (defun vc-hg-workfile-unchanged-p (file)
 456   (eq 'up-to-date (vc-hg-state file)))
 457
 458 ;; Modeled after the similar function in vc-bzr.el
 459 (defun vc-hg-revert (file &optional contents-done)
 460   (unless contents-done
 461     (with-temp-buffer (vc-hg-command t 0 file "revert"))))
 462
 463 ;;; Hg specific functionality.
 464
 465 (defvar vc-hg-extra-menu-map
 466   (let ((map (make-sparse-keymap)))
 467     map))
 468
 469 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
 470
 471 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
 472
 473 (defvar log-view-vc-backend)
 474
 475 (defstruct (vc-hg-extra-fileinfo
 476             (:copier nil)
 477             (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
 478             (:conc-name vc-hg-extra-fileinfo->))
 479   rename-state        ;; rename or copy state
 480   extra-name)         ;; original name for copies and rename targets, new name for
 481
 482 (declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
 483
 484 (defun vc-hg-dir-printer (info)
 485   "Pretty-printer for the vc-dir-fileinfo structure."
 486   (let ((extra (vc-dir-fileinfo->extra info)))
 487     (vc-default-dir-printer 'Hg info)
 488     (when extra
 489       (insert (propertize
 490                (format "   (%s %s)"
 491                        (case (vc-hg-extra-fileinfo->rename-state extra)
 492                          ('copied "copied from")
 493                          ('renamed-from "renamed from")
 494                          ('renamed-to "renamed to"))
 495                        (vc-hg-extra-fileinfo->extra-name extra))
 496                'face 'font-lock-comment-face)))))
 497
 498 (defun vc-hg-after-dir-status (update-function)
 499   (let ((status-char nil)
 500         (file nil)
 501         (translation '((?= . up-to-date)
 502                        (?C . up-to-date)
 503                        (?A . added)
 504                        (?R . removed)
 505                        (?M . edited)
 506                        (?I . ignored)
 507                        (?! . missing)
 508                        (?  . copy-rename-line)
 509                        (?? . unregistered)))
 510         (translated nil)
 511         (result nil)
 512         (last-added nil)
 513         (last-line-copy nil))
 514       (goto-char (point-min))
 515       (while (not (eobp))
 516         (setq translated (cdr (assoc (char-after) translation)))
 517         (setq file
 518               (buffer-substring-no-properties (+ (point) 2)
 519                                               (line-end-position)))
 520         (cond ((not translated)
 521                (setq last-line-copy nil))
 522               ((eq translated 'up-to-date)
 523                (setq last-line-copy nil))
 524               ((eq translated 'copy-rename-line)
 525                ;; For copied files the output looks like this:
 526                ;; A COPIED_FILE_NAME
 527                ;;   ORIGINAL_FILE_NAME
 528                (setf (nth 2 last-added)
 529                      (vc-hg-create-extra-fileinfo 'copied file))
 530                (setq last-line-copy t))
 531               ((and last-line-copy (eq translated 'removed))
 532                ;; For renamed files the output looks like this:
 533                ;; A NEW_FILE_NAME
 534                ;;   ORIGINAL_FILE_NAME
 535                ;; R ORIGINAL_FILE_NAME
 536                ;; We need to adjust the previous entry to not think it is a copy.
 537                (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
 538                      'renamed-from)
 539                (push (list file translated
 540                            (vc-hg-create-extra-fileinfo
 541                             'renamed-to (nth 0 last-added))) result)
 542                (setq last-line-copy nil))
 543               (t
 544                (setq last-added (list file translated nil))
 545                (push last-added result)
 546                (setq last-line-copy nil)))
 547         (forward-line))
 548       (funcall update-function result)))
 549
 550 (defun vc-hg-dir-status (dir update-function)
 551   (vc-hg-command (current-buffer) 'async dir "status" "-C")
 552   (vc-exec-after
 553    `(vc-hg-after-dir-status (quote ,update-function))))
 554
 555 (defun vc-hg-dir-status-files (dir files default-state update-function)
 556   (apply 'vc-hg-command (current-buffer) 'async dir "status" "-C" files)
 557   (vc-exec-after
 558    `(vc-hg-after-dir-status (quote ,update-function))))
 559
 560 (defun vc-hg-dir-extra-header (name &rest commands)
 561   (concat (propertize name 'face 'font-lock-type-face)
 562           (propertize
 563            (with-temp-buffer
 564              (apply 'vc-hg-command (current-buffer) 0 nil commands)
 565              (buffer-substring-no-properties (point-min) (1- (point-max))))
 566            'face 'font-lock-variable-name-face)))
 567
 568 (defun vc-hg-dir-extra-headers (dir)
 569   "Generate extra status headers for a Mercurial tree."
 570   (let ((default-directory dir))
 571     (concat
 572      (vc-hg-dir-extra-header "Root       : " "root") "\n"
 573      (vc-hg-dir-extra-header "Branch     : " "id" "-b") "\n"
 574      (vc-hg-dir-extra-header "Tags       : " "id" "-t") ; "\n"
 575      ;; these change after each commit
 576      ;; (vc-hg-dir-extra-header "Local num  : " "id" "-n") "\n"
 577      ;; (vc-hg-dir-extra-header "Global id  : " "id" "-i")
 578      )))
 579
 580 (defun vc-hg-log-incoming (buffer remote-location)
 581   (vc-hg-command buffer 1 nil "incoming" "-n" (unless (string= remote-location "")
 582                                                 remote-location)))
 583
 584 (defun vc-hg-log-outgoing (buffer remote-location)
 585   (vc-hg-command buffer 1 nil "outgoing" "-n" (unless (string= remote-location "")
 586                                                 remote-location)))
 587
 588 (declare-function log-view-get-marked "log-view" ())
 589
 590 ;; XXX maybe also add key bindings for these functions.
 591 (defun vc-hg-push ()
 592   (interactive)
 593   (let ((marked-list (log-view-get-marked)))
 594     (if marked-list
 595         (apply #'vc-hg-command
 596                nil 0 nil
 597                "push"
 598                (apply 'nconc
 599                       (mapcar (lambda (arg) (list "-r" arg)) marked-list)))
 600       (error "No log entries selected for push"))))
 601
 602 (defun vc-hg-pull ()
 603   (interactive)
 604   (let ((marked-list (log-view-get-marked)))
 605     (if marked-list
 606         (apply #'vc-hg-command
 607                nil 0 nil
 608                "pull"
 609                (apply 'nconc
 610                       (mapcar (lambda (arg) (list "-r" arg)) marked-list)))
 611       (error "No log entries selected for pull"))))
 612
 613 ;;; Internal functions
 614
 615 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
 616   "A wrapper around `vc-do-command' for use in vc-hg.el.
 617 The difference to vc-do-command is that this function always invokes `hg',
 618 and that it passes `vc-hg-global-switches' to it before FLAGS."
 619   (apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
 620          (if (stringp vc-hg-global-switches)
 621              (cons vc-hg-global-switches flags)
 622            (append vc-hg-global-switches
 623                    flags))))
 624
 625 (defun vc-hg-root (file)
 626   (vc-find-root file ".hg"))
 627
 628 (provide 'vc-hg)
 629
 630 ;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
 631 ;;; vc-hg.el ends here