code.delx.au - gnu-emacs/blob - lisp/vc-hg.el

   1 ;;; vc-hg.el --- VC backend for the mercurial version control system
   2
   3 ;; Copyright (C) 2006, 2007, 2008, 2009 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 can parse the output.
 172                              (append (list "TERM=dumb" "LANGUAGE=C" "HGRC=") process-environment)))
 173
 174                       (process-file
 175                        "hg" nil t nil
 176                        "status" "-A" (file-relative-name file)))
 177                     ;; Some problem happened.  E.g. We can't find an `hg'
 178                     ;; executable.
 179                     (error nil)))))))
 180     (when (eq 0 status)
 181         (when (null (string-match ".*: No such file or directory$" out))
 182           (let ((state (aref out 0)))
 183             (cond
 184              ((eq state ?=) 'up-to-date)
 185              ((eq state ?A) 'added)
 186              ((eq state ?M) 'edited)
 187              ((eq state ?I) 'ignored)
 188              ((eq state ?R) 'removed)
 189              ((eq state ?!) 'missing)
 190              ((eq state ??) 'unregistered)
 191              ((eq state ?C) 'up-to-date) ;; Older mercurials use this
 192              (t 'up-to-date)))))))
 193
 194 (defun vc-hg-working-revision (file)
 195   "Hg-specific version of `vc-working-revision'."
 196   (let*
 197       ((status nil)
 198        (default-directory (file-name-directory file))
 199        (out
 200         (with-output-to-string
 201           (with-current-buffer
 202               standard-output
 203             (setq status
 204                   (condition-case nil
 205                       ;; Ignore all errors.
 206                       (process-file
 207                        "hg" nil t nil
 208                        "log" "-l1" (file-relative-name file))
 209                     ;; Some problem happened.  E.g. We can't find an `hg'
 210                     ;; executable.
 211                     (error nil)))))))
 212     (when (eq 0 status)
 213       (if (string-match "changeset: *\\([0-9]*\\)" out)
 214           (match-string 1 out)
 215         "0"))))
 216
 217 ;;; History functions
 218
 219 (defcustom vc-hg-log-switches nil
 220   "String or list of strings specifying switches for hg log under VC."
 221   :type '(choice (const :tag "None" nil)
 222                  (string :tag "Argument String")
 223                  (repeat :tag "Argument List" :value ("") string))
 224   :group 'vc-hg)
 225
 226 (defun vc-hg-print-log (files buffer &optional shortlog start-revision limit)
 227   "Get change log associated with FILES."
 228   ;; `vc-do-command' creates the buffer, but we need it before running
 229   ;; the command.
 230   (vc-setup-buffer buffer)
 231   ;; If the buffer exists from a previous invocation it might be
 232   ;; read-only.
 233   (let ((inhibit-read-only t))
 234     (with-current-buffer
 235         buffer
 236       (apply 'vc-hg-command buffer 0 files "log"
 237              (append
 238               (when start-revision (list (format "-r%s:" start-revision)))
 239               (when limit (list "-l" (format "%s" limit)))
 240               (when shortlog '("--style" "compact"))
 241               vc-hg-log-switches)))))
 242
 243 (defvar log-view-message-re)
 244 (defvar log-view-file-re)
 245 (defvar log-view-font-lock-keywords)
 246 (defvar log-view-per-file-logs)
 247 (defvar vc-short-log)
 248
 249 (define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
 250   (require 'add-log) ;; we need the add-log faces
 251   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 252   (set (make-local-variable 'log-view-per-file-logs) nil)
 253   (set (make-local-variable 'log-view-message-re)
 254        (if vc-short-log
 255            "^\\([0-9]+\\)\\(?:\\[.*\\]\\)? +\\([0-9a-z]\\{12\\}\\) +\\(\\(?:[0-9]+\\)-\\(?:[0-9]+\\)-\\(?:[0-9]+\\) \\(?:[0-9]+\\):\\(?:[0-9]+\\) \\(?:[-+0-9]+\\)\\) +\\(.*\\)$"
 256          "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)"))
 257   (set (make-local-variable 'log-view-font-lock-keywords)
 258        (if vc-short-log
 259            (append `((,log-view-message-re
 260                       (1 'log-view-message-face)
 261                       (2 'log-view-message-face)
 262                       (3 'change-log-date)
 263                       (4 'change-log-name))))
 264        (append
 265         log-view-font-lock-keywords
 266         '(
 267           ;; Handle the case:
 268           ;; user: FirstName LastName <foo@bar>
 269           ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
 270            (1 'change-log-name)
 271            (2 'change-log-email))
 272           ;; Handle the cases:
 273           ;; user: foo@bar
 274           ;; and
 275           ;; user: foo
 276           ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
 277            (1 'change-log-email))
 278           ("^date: \\(.+\\)" (1 'change-log-date))
 279             ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message)))))))
 280
 281 (defun vc-hg-diff (files &optional oldvers newvers buffer)
 282   "Get a difference report using hg between two revisions of FILES."
 283   (let* ((firstfile (car files))
 284          (working (and firstfile (vc-working-revision firstfile))))
 285     (when (and (equal oldvers working) (not newvers))
 286       (setq oldvers nil))
 287     (when (and (not oldvers) newvers)
 288       (setq oldvers working))
 289     (apply #'vc-hg-command (or buffer "*vc-diff*") nil files "diff"
 290            (append
 291             (vc-switches 'hg 'diff)
 292             (when oldvers
 293               (if newvers
 294                   (list "-r" oldvers "-r" newvers)
 295                 (list "-r" oldvers)))))))
 296
 297 (defun vc-hg-revision-table (files)
 298   (let ((default-directory (file-name-directory (car files))))
 299     (with-temp-buffer
 300       (vc-hg-command t nil files "log" "--template" "{rev} ")
 301       (split-string
 302        (buffer-substring-no-properties (point-min) (point-max))))))
 303
 304 ;; Modeled after the similar function in vc-cvs.el
 305 (defun vc-hg-revision-completion-table (files)
 306   (lexical-let ((files files)
 307                 table)
 308     (setq table (lazy-completion-table
 309                  table (lambda () (vc-hg-revision-table files))))
 310     table))
 311
 312 (defun vc-hg-annotate-command (file buffer &optional revision)
 313   "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
 314 Optional arg REVISION is a revision to annotate from."
 315   (vc-hg-command buffer 0 file "annotate" "-d" "-n" "--follow"
 316                  (when revision (concat "-r" revision))))
 317
 318 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 319
 320 ;; The format for one line output by "hg annotate -d -n" looks like this:
 321 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
 322 ;; i.e: VERSION_NUMBER DATE: CONTENTS
 323 ;; If the user has set the "--follow" option, the output looks like:
 324 ;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
 325 ;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
 326 (defconst vc-hg-annotate-re
 327   "^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)\\(?:\\(: \\)\\|\\(?: +\\(.+\\): \\)\\)")
 328
 329 (defun vc-hg-annotate-time ()
 330   (when (looking-at vc-hg-annotate-re)
 331     (goto-char (match-end 0))
 332     (vc-annotate-convert-time
 333      (date-to-time (match-string-no-properties 2)))))
 334
 335 (defun vc-hg-annotate-extract-revision-at-line ()
 336   (save-excursion
 337     (beginning-of-line)
 338     (when (looking-at vc-hg-annotate-re)
 339       (if (match-beginning 3)
 340           (match-string-no-properties 1)
 341         (cons (match-string-no-properties 1)
 342               (expand-file-name (match-string-no-properties 4)))))))
 343
 344 (defun vc-hg-previous-revision (file rev)
 345   (let ((newrev (1- (string-to-number rev))))
 346     (when (>= newrev 0)
 347       (number-to-string newrev))))
 348
 349 (defun vc-hg-next-revision (file rev)
 350   (let ((newrev (1+ (string-to-number rev)))
 351         (tip-revision
 352          (with-temp-buffer
 353            (vc-hg-command t 0 nil "tip")
 354            (goto-char (point-min))
 355            (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
 356            (string-to-number (match-string-no-properties 1)))))
 357     ;; We don't want to exceed the maximum possible revision number, ie
 358     ;; the tip revision.
 359     (when (<= newrev tip-revision)
 360       (number-to-string newrev))))
 361
 362 ;; Modeled after the similar function in vc-bzr.el
 363 (defun vc-hg-delete-file (file)
 364   "Delete FILE and delete it in the hg repository."
 365   (condition-case ()
 366       (delete-file file)
 367     (file-error nil))
 368   (vc-hg-command nil 0 file "remove" "--after" "--force"))
 369
 370 ;; Modeled after the similar function in vc-bzr.el
 371 (defun vc-hg-rename-file (old new)
 372   "Rename file from OLD to NEW using `hg mv'."
 373   (vc-hg-command nil 0 new "mv" old))
 374
 375 (defun vc-hg-register (files &optional rev comment)
 376   "Register FILES under hg.
 377 REV is ignored.
 378 COMMENT is ignored."
 379   (vc-hg-command nil 0 files "add"))
 380
 381 (defun vc-hg-create-repo ()
 382   "Create a new Mercurial repository."
 383   (vc-hg-command nil 0 nil "init"))
 384
 385 (defalias 'vc-hg-responsible-p 'vc-hg-root)
 386
 387 ;; Modeled after the similar function in vc-bzr.el
 388 (defun vc-hg-could-register (file)
 389   "Return non-nil if FILE could be registered under hg."
 390   (and (vc-hg-responsible-p file)      ; shortcut
 391        (condition-case ()
 392            (with-temp-buffer
 393              (vc-hg-command t nil file "add" "--dry-run"))
 394              ;; The command succeeds with no output if file is
 395              ;; registered.
 396          (error))))
 397
 398 ;; FIXME: This would remove the file. Is that correct?
 399 ;; (defun vc-hg-unregister (file)
 400 ;;   "Unregister FILE from hg."
 401 ;;   (vc-hg-command nil nil file "remove"))
 402
 403 (defun vc-hg-checkin (files rev comment)
 404   "Hg-specific version of `vc-backend-checkin'.
 405 REV is ignored."
 406   (vc-hg-command nil 0 files  "commit" "-m" comment))
 407
 408 (defun vc-hg-find-revision (file rev buffer)
 409   (let ((coding-system-for-read 'binary)
 410         (coding-system-for-write 'binary))
 411     (if rev
 412         (vc-hg-command buffer 0 file "cat" "-r" rev)
 413       (vc-hg-command buffer 0 file "cat"))))
 414
 415 ;; Modeled after the similar function in vc-bzr.el
 416 (defun vc-hg-checkout (file &optional editable rev)
 417   "Retrieve a revision of FILE.
 418 EDITABLE is ignored.
 419 REV is the revision to check out into WORKFILE."
 420   (let ((coding-system-for-read 'binary)
 421         (coding-system-for-write 'binary))
 422   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 423     (if rev
 424         (vc-hg-command t 0 file "cat" "-r" rev)
 425       (vc-hg-command t 0 file "cat")))))
 426
 427 ;; Modeled after the similar function in vc-bzr.el
 428 (defun vc-hg-workfile-unchanged-p (file)
 429   (eq 'up-to-date (vc-hg-state file)))
 430
 431 ;; Modeled after the similar function in vc-bzr.el
 432 (defun vc-hg-revert (file &optional contents-done)
 433   (unless contents-done
 434     (with-temp-buffer (vc-hg-command t 0 file "revert"))))
 435
 436 ;;; Hg specific functionality.
 437
 438 (defvar vc-hg-extra-menu-map
 439   (let ((map (make-sparse-keymap)))
 440     (define-key map [incoming] '(menu-item "Show incoming" vc-hg-incoming))
 441     (define-key map [outgoing] '(menu-item "Show outgoing" vc-hg-outgoing))
 442     map))
 443
 444 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
 445
 446 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
 447
 448 (defvar log-view-vc-backend)
 449
 450 (define-derived-mode vc-hg-outgoing-mode vc-hg-log-view-mode "Hg-Outgoing"
 451   "Mode for browsing Hg outgoing changes."
 452   (set (make-local-variable 'log-view-vc-backend) 'Hg))
 453
 454 (define-derived-mode vc-hg-incoming-mode vc-hg-log-view-mode "Hg-Incoming"
 455   "Mode for browsing Hg incoming changes."
 456   (set (make-local-variable 'log-view-vc-backend) 'Hg))
 457
 458 (defstruct (vc-hg-extra-fileinfo
 459             (:copier nil)
 460             (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
 461             (:conc-name vc-hg-extra-fileinfo->))
 462   rename-state        ;; rename or copy state
 463   extra-name)         ;; original name for copies and rename targets, new name for
 464
 465 (declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
 466
 467 (defun vc-hg-dir-printer (info)
 468   "Pretty-printer for the vc-dir-fileinfo structure."
 469   (let ((extra (vc-dir-fileinfo->extra info)))
 470     (vc-default-dir-printer 'Hg info)
 471     (when extra
 472       (insert (propertize
 473                (format "   (%s %s)"
 474                        (case (vc-hg-extra-fileinfo->rename-state extra)
 475                          ('copied "copied from")
 476                          ('renamed-from "renamed from")
 477                          ('renamed-to "renamed to"))
 478                        (vc-hg-extra-fileinfo->extra-name extra))
 479                'face 'font-lock-comment-face)))))
 480
 481 (defun vc-hg-after-dir-status (update-function)
 482   (let ((status-char nil)
 483         (file nil)
 484         (translation '((?= . up-to-date)
 485                        (?C . up-to-date)
 486                        (?A . added)
 487                        (?R . removed)
 488                        (?M . edited)
 489                        (?I . ignored)
 490                        (?! . missing)
 491                        (?  . copy-rename-line)
 492                        (?? . unregistered)))
 493         (translated nil)
 494         (result nil)
 495         (last-added nil)
 496         (last-line-copy nil))
 497       (goto-char (point-min))
 498       (while (not (eobp))
 499         (setq translated (cdr (assoc (char-after) translation)))
 500         (setq file
 501               (buffer-substring-no-properties (+ (point) 2)
 502                                               (line-end-position)))
 503         (cond ((not translated)
 504                (setq last-line-copy nil))
 505               ((eq translated 'up-to-date)
 506                (setq last-line-copy nil))
 507               ((eq translated 'copy-rename-line)
 508                ;; For copied files the output looks like this:
 509                ;; A COPIED_FILE_NAME
 510                ;;   ORIGINAL_FILE_NAME
 511                (setf (nth 2 last-added)
 512                      (vc-hg-create-extra-fileinfo 'copied file))
 513                (setq last-line-copy t))
 514               ((and last-line-copy (eq translated 'removed))
 515                ;; For renamed files the output looks like this:
 516                ;; A NEW_FILE_NAME
 517                ;;   ORIGINAL_FILE_NAME
 518                ;; R ORIGINAL_FILE_NAME
 519                ;; We need to adjust the previous entry to not think it is a copy.
 520                (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
 521                      'renamed-from)
 522                (push (list file translated
 523                            (vc-hg-create-extra-fileinfo
 524                             'renamed-to (nth 0 last-added))) result)
 525                (setq last-line-copy nil))
 526               (t
 527                (setq last-added (list file translated nil))
 528                (push last-added result)
 529                (setq last-line-copy nil)))
 530         (forward-line))
 531       (funcall update-function result)))
 532
 533 (defun vc-hg-dir-status (dir update-function)
 534   (vc-hg-command (current-buffer) 'async dir "status" "-C")
 535   (vc-exec-after
 536    `(vc-hg-after-dir-status (quote ,update-function))))
 537
 538 (defun vc-hg-dir-status-files (dir files default-state update-function)
 539   (apply 'vc-hg-command (current-buffer) 'async dir "status" "-C" files)
 540   (vc-exec-after
 541    `(vc-hg-after-dir-status (quote ,update-function))))
 542
 543 (defun vc-hg-dir-extra-header (name &rest commands)
 544   (concat (propertize name 'face 'font-lock-type-face)
 545           (propertize
 546            (with-temp-buffer
 547              (apply 'vc-hg-command (current-buffer) 0 nil commands)
 548              (buffer-substring-no-properties (point-min) (1- (point-max))))
 549            'face 'font-lock-variable-name-face)))
 550
 551 (defun vc-hg-dir-extra-headers (dir)
 552   "Generate extra status headers for a Mercurial tree."
 553   (let ((default-directory dir))
 554     (concat
 555      (vc-hg-dir-extra-header "Root       : " "root") "\n"
 556      (vc-hg-dir-extra-header "Branch     : " "id" "-b") "\n"
 557      (vc-hg-dir-extra-header "Tags       : " "id" "-t") ; "\n"
 558      ;; these change after each commit
 559      ;; (vc-hg-dir-extra-header "Local num  : " "id" "-n") "\n"
 560      ;; (vc-hg-dir-extra-header "Global id  : " "id" "-i")
 561      )))
 562
 563 ;; FIXME: this adds another top level menu, instead figure out how to
 564 ;; replace the Log-View menu.
 565 (easy-menu-define log-view-mode-menu vc-hg-outgoing-mode-map
 566   "Hg-outgoing Display Menu"
 567   `("Hg-outgoing"
 568     ["Push selected"  vc-hg-push]))
 569
 570 (easy-menu-define log-view-mode-menu vc-hg-incoming-mode-map
 571   "Hg-incoming Display Menu"
 572   `("Hg-incoming"
 573     ["Pull selected"  vc-hg-pull]))
 574
 575 (defun vc-hg-outgoing ()
 576   (interactive)
 577   (let ((bname "*Hg outgoing*")
 578         (vc-short-log nil))
 579     (vc-hg-command bname 1 nil "outgoing" "-n")
 580     (pop-to-buffer bname)
 581     (vc-hg-outgoing-mode)))
 582
 583 (defun vc-hg-incoming ()
 584   (interactive)
 585   (let ((bname "*Hg incoming*")
 586         (vc-short-log nil))
 587     (vc-hg-command bname 0 nil "incoming" "-n")
 588     (pop-to-buffer bname)
 589     (vc-hg-incoming-mode)))
 590
 591 (declare-function log-view-get-marked "log-view" ())
 592
 593 ;; XXX maybe also add key bindings for these functions.
 594 (defun vc-hg-push ()
 595   (interactive)
 596   (let ((marked-list (log-view-get-marked)))
 597     (if marked-list
 598         (vc-hg-command
 599          nil 0 nil
 600          (cons "push"
 601                (apply 'nconc
 602                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 603          (error "No log entries selected for push"))))
 604
 605 (defun vc-hg-pull ()
 606   (interactive)
 607   (let ((marked-list (log-view-get-marked)))
 608     (if marked-list
 609         (vc-hg-command
 610          nil 0 nil
 611          (cons "pull"
 612                (apply 'nconc
 613                       (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
 614       (error "No log entries selected for pull"))))
 615
 616 ;;; Internal functions
 617
 618 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
 619   "A wrapper around `vc-do-command' for use in vc-hg.el.
 620 The difference to vc-do-command is that this function always invokes `hg',
 621 and that it passes `vc-hg-global-switches' to it before FLAGS."
 622   (apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
 623          (if (stringp vc-hg-global-switches)
 624              (cons vc-hg-global-switches flags)
 625            (append vc-hg-global-switches
 626                    flags))))
 627
 628 (defun vc-hg-root (file)
 629   (vc-find-root file ".hg"))
 630
 631 (provide 'vc-hg)
 632
 633 ;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
 634 ;;; vc-hg.el ends here