lisp/vc/vc-hg.el

   1 ;;; vc-hg.el --- VC backend for the mercurial version control system  -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2006-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: Ivan Kanis
   6 ;; Maintainer: emacs-devel@gnu.org
   7 ;; Keywords: vc tools
   8 ;; Package: vc
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; This is a mercurial version control backend
  28
  29 ;;; Thanks:
  30
  31 ;;; Bugs:
  32
  33 ;;; Installation:
  34
  35 ;;; Todo:
  36
  37 ;; 1) Implement the rest of the vc interface. See the comment at the
  38 ;; beginning of vc.el. The current status is:
  39
  40 ;; FUNCTION NAME                               STATUS
  41 ;; BACKEND PROPERTIES
  42 ;; * revision-granularity                      OK
  43 ;; STATE-QUERYING FUNCTIONS
  44 ;; * registered (file)                         OK
  45 ;; * state (file)                              OK
  46 ;; - dir-status-files (dir files uf)           OK
  47 ;; - dir-extra-headers (dir)                   OK
  48 ;; - dir-printer (fileinfo)                    OK
  49 ;; * working-revision (file)                   OK
  50 ;; * checkout-model (files)                    OK
  51 ;; - mode-line-string (file)                   NOT NEEDED
  52 ;; STATE-CHANGING FUNCTIONS
  53 ;; * register (files &optional rev comment)    OK
  54 ;; * create-repo ()                            OK
  55 ;; - responsible-p (file)                      OK
  56 ;; - receive-file (file rev)                   ?? PROBABLY NOT NEEDED
  57 ;; - unregister (file)                         OK
  58 ;; * checkin (files rev comment)               OK
  59 ;; * find-revision (file rev buffer)           OK
  60 ;; * checkout (file &optional rev)             OK
  61 ;; * revert (file &optional contents-done)     OK
  62 ;; - merge (file rev1 rev2)                    NEEDED
  63 ;; - merge-news (file)                         NEEDED
  64 ;; - steal-lock (file &optional revision)      NOT NEEDED
  65 ;; HISTORY FUNCTIONS
  66 ;; * print-log (files buffer &optional shortlog start-revision limit) OK
  67 ;; - log-view-mode ()                          OK
  68 ;; - show-log-entry (revision)                 NOT NEEDED, DEFAULT IS GOOD
  69 ;; - comment-history (file)                    NOT NEEDED
  70 ;; - update-changelog (files)                  NOT NEEDED
  71 ;; * diff (files &optional rev1 rev2 buffer)   OK
  72 ;; - revision-completion-table (files)         OK?
  73 ;; - annotate-command (file buf &optional rev) OK
  74 ;; - annotate-time ()                          OK
  75 ;; - annotate-current-time ()                  NOT NEEDED
  76 ;; - annotate-extract-revision-at-line ()      OK
  77 ;; TAG SYSTEM
  78 ;; - create-tag (dir name branchp)             OK
  79 ;; - retrieve-tag (dir name update)            OK FIXME UPDATE BUFFERS
  80 ;; MISCELLANEOUS
  81 ;; - make-version-backups-p (file)             ??
  82 ;; - previous-revision (file rev)              OK
  83 ;; - next-revision (file rev)                  OK
  84 ;; - check-headers ()                          ??
  85 ;; - delete-file (file)                        TEST IT
  86 ;; - rename-file (old new)                     OK
  87 ;; - find-file-hook ()                         added for bug#10709
  88
  89 ;; 2) Implement Stefan Monnier's advice:
  90 ;; vc-hg-registered and vc-hg-state
  91 ;; Both of those functions should be super extra careful to fail gracefully in
  92 ;; unexpected circumstances. The reason this is important is that any error
  93 ;; there will prevent the user from even looking at the file :-(
  94 ;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
  95 ;; mercurial's control and extracting the current revision should be done
  96 ;; without even using `hg' (this way even if you don't have `hg' installed,
  97 ;; Emacs is able to tell you this file is under mercurial's control).
  98
  99 ;;; History:
 100 ;;
 101
 102 ;;; Code:
 103
 104 (eval-when-compile
 105   (require 'cl-lib)
 106   (require 'vc)
 107   (require 'vc-dir))
 108
 109 ;;; Customization options
 110
 111 (defgroup vc-hg nil
 112   "VC Mercurial (hg) backend."
 113   :version "24.1"
 114   :group 'vc)
 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" :value ("") string))
 121   :version "22.2"
 122   :group 'vc-hg)
 123
 124 (defcustom vc-hg-diff-switches t ; Hg doesn't support common args like -u
 125   "String or list of strings specifying switches for Hg diff under VC.
 126 If nil, use the value of `vc-diff-switches'.  If t, use no switches."
 127   :type '(choice (const :tag "Unspecified" nil)
 128                  (const :tag "None" t)
 129                  (string :tag "Argument String")
 130                  (repeat :tag "Argument List" :value ("") string))
 131   :version "23.1"
 132   :group 'vc-hg)
 133
 134 (defcustom vc-hg-program "hg"
 135   "Name of the Mercurial executable (excluding any arguments)."
 136   :type 'string
 137   :group 'vc-hg)
 138
 139 (defcustom vc-hg-root-log-format
 140   `(,(concat "{rev}:{ifeq(branch, 'default','', '{branch}')}"
 141              ":{bookmarks}:{tags}:{author|person}"
 142              " {date|shortdate} {desc|firstline}\\n")
 143     ,(concat "^\\(?:[+@o x|-]*\\)"      ;Graph data.
 144              "\\([0-9]+\\):\\([^:]*\\)"
 145              ":\\([^:]*\\):\\([^:]*\\):\\(.*?\\)"
 146              "[ \t]+\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\}\\)")
 147     ((1 'log-view-message-face)
 148      (2 'change-log-file)
 149      (3 'change-log-list)
 150      (4 'change-log-conditionals)
 151      (5 'change-log-name)
 152      (6 'change-log-date)))
 153   "Mercurial log template for `vc-hg-print-log' short format.
 154 This should be a list (TEMPLATE REGEXP KEYWORDS), where TEMPLATE
 155 is the \"--template\" argument string to pass to Mercurial,
 156 REGEXP is a regular expression matching the resulting Mercurial
 157 output, and KEYWORDS is a list of `font-lock-keywords' for
 158 highlighting the Log View buffer."
 159   :type '(list string string (repeat sexp))
 160   :group 'vc-hg
 161   :version "24.5")
 162
 163 \f
 164 ;;; Properties of the backend
 165
 166 (defvar vc-hg-history nil)
 167
 168 (defun vc-hg-revision-granularity () 'repository)
 169 (defun vc-hg-checkout-model (_files) 'implicit)
 170
 171 ;;; State querying functions
 172
 173 ;;;###autoload (defun vc-hg-registered (file)
 174 ;;;###autoload   "Return non-nil if FILE is registered with hg."
 175 ;;;###autoload   (if (vc-find-root file ".hg")       ; short cut
 176 ;;;###autoload       (progn
 177 ;;;###autoload         (load "vc-hg" nil t)
 178 ;;;###autoload         (vc-hg-registered file))))
 179
 180 ;; Modeled after the similar function in vc-bzr.el
 181 (defun vc-hg-registered (file)
 182   "Return non-nil if FILE is registered with hg."
 183   (when (vc-hg-root file)           ; short cut
 184     (let ((state (vc-hg-state file)))  ; expensive
 185       (and state (not (memq state '(ignored unregistered)))))))
 186
 187 (defun vc-hg-state (file)
 188   "Hg-specific version of `vc-state'."
 189   (setq file (expand-file-name file))
 190   (let*
 191       ((status nil)
 192        (default-directory (file-name-directory file))
 193        (out
 194         (with-output-to-string
 195           (with-current-buffer
 196               standard-output
 197             (setq status
 198                   (condition-case nil
 199                       ;; Ignore all errors.
 200                       (let ((process-environment
 201                              ;; Avoid localization of messages so we
 202                              ;; can parse the output.  Disable pager.
 203                              (append
 204                               (list "TERM=dumb" "LANGUAGE=C" "HGPLAIN=1")
 205                               process-environment)))
 206                         (process-file
 207                          vc-hg-program nil t nil
 208                          "--config" "alias.status=status"
 209                          "--config" "defaults.status="
 210                          "status" "-A" (file-relative-name file)))
 211                     ;; Some problem happened.  E.g. We can't find an `hg'
 212                     ;; executable.
 213                     (error nil)))))))
 214     (when (and (eq 0 status)
 215                (> (length out) 0)
 216                (null (string-match ".*: No such file or directory$" out)))
 217       (let ((state (aref out 0)))
 218         (cond
 219          ((eq state ?=) 'up-to-date)
 220          ((eq state ?A) 'added)
 221          ((eq state ?M) 'edited)
 222          ((eq state ?I) 'ignored)
 223          ((eq state ?R) 'removed)
 224          ((eq state ?!) 'missing)
 225          ((eq state ??) 'unregistered)
 226          ((eq state ?C) 'up-to-date) ;; Older mercurial versions use this.
 227          (t 'up-to-date))))))
 228
 229 (defun vc-hg-working-revision (file)
 230   "Hg-specific version of `vc-working-revision'."
 231   (or (ignore-errors
 232         (with-output-to-string
 233           (vc-hg-command standard-output 0 file
 234                          "parent" "--template" "{rev}")))
 235       "0"))
 236
 237 ;;; History functions
 238
 239 (defcustom vc-hg-log-switches nil
 240   "String or list of strings specifying switches for hg log under VC."
 241   :type '(choice (const :tag "None" nil)
 242                  (string :tag "Argument String")
 243                  (repeat :tag "Argument List" :value ("") string))
 244   :group 'vc-hg)
 245
 246 (autoload 'vc-setup-buffer "vc-dispatcher")
 247
 248 (defvar vc-hg-log-graph nil
 249   "If non-nil, use `--graph' in the short log output.")
 250
 251 (defun vc-hg-print-log (files buffer &optional shortlog start-revision limit)
 252   "Print commit log associated with FILES into specified BUFFER.
 253 If SHORTLOG is non-nil, use a short format based on `vc-hg-root-log-format'.
 254 If START-REVISION is non-nil, it is the newest revision to show.
 255 If LIMIT is non-nil, show no more than this many entries."
 256   ;; `vc-do-command' creates the buffer, but we need it before running
 257   ;; the command.
 258   (vc-setup-buffer buffer)
 259   ;; If the buffer exists from a previous invocation it might be
 260   ;; read-only.
 261   (let ((inhibit-read-only t))
 262     (with-current-buffer
 263         buffer
 264       (apply 'vc-hg-command buffer 0 files "log"
 265              (nconc
 266               (when start-revision (list (format "-r%s:0" start-revision)))
 267               (when limit (list "-l" (format "%s" limit)))
 268               (when shortlog `(,@(if vc-hg-log-graph '("--graph"))
 269                                "--template"
 270                                ,(car vc-hg-root-log-format)))
 271               vc-hg-log-switches)))))
 272
 273 (defvar log-view-message-re)
 274 (defvar log-view-file-re)
 275 (defvar log-view-font-lock-keywords)
 276 (defvar log-view-per-file-logs)
 277 (defvar log-view-expanded-log-entry-function)
 278
 279 (define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
 280   (require 'add-log) ;; we need the add-log faces
 281   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 282   (set (make-local-variable 'log-view-per-file-logs) nil)
 283   (set (make-local-variable 'log-view-message-re)
 284        (if (eq vc-log-view-type 'short)
 285            (cadr vc-hg-root-log-format)
 286          "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)"))
 287   ;; Allow expanding short log entries
 288   (when (eq vc-log-view-type 'short)
 289     (setq truncate-lines t)
 290     (set (make-local-variable 'log-view-expanded-log-entry-function)
 291          'vc-hg-expanded-log-entry))
 292   (set (make-local-variable 'log-view-font-lock-keywords)
 293        (if (eq vc-log-view-type 'short)
 294            (list (cons (nth 1 vc-hg-root-log-format)
 295                        (nth 2 vc-hg-root-log-format)))
 296          (append
 297           log-view-font-lock-keywords
 298           '(
 299             ;; Handle the case:
 300             ;; user: FirstName LastName <foo@bar>
 301             ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
 302              (1 'change-log-name)
 303              (2 'change-log-email))
 304             ;; Handle the cases:
 305             ;; user: foo@bar
 306             ;; and
 307             ;; user: foo
 308             ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
 309              (1 'change-log-email))
 310             ("^date: \\(.+\\)" (1 'change-log-date))
 311             ("^tag: +\\([^ ]+\\)$" (1 'highlight))
 312             ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message)))))))
 313
 314 (autoload 'vc-switches "vc")
 315
 316 (defun vc-hg-diff (files &optional async oldvers newvers buffer)
 317   "Get a difference report using hg between two revisions of FILES."
 318   (let* ((firstfile (car files))
 319          (working (and firstfile (vc-working-revision firstfile))))
 320     (when (and (equal oldvers working) (not newvers))
 321       (setq oldvers nil))
 322     (when (and (not oldvers) newvers)
 323       (setq oldvers working))
 324     (apply #'vc-hg-command
 325            (or buffer "*vc-diff*")
 326            (if async 'async nil)
 327            files "diff"
 328            (append
 329             (vc-switches 'hg 'diff)
 330             (when oldvers
 331               (if newvers
 332                   (list "-r" oldvers "-r" newvers)
 333                 (list "-r" oldvers)))))))
 334
 335 (defun vc-hg-expanded-log-entry (revision)
 336   (with-temp-buffer
 337     (vc-hg-command t nil nil "log" "-r" revision)
 338     (goto-char (point-min))
 339     (unless (eobp)
 340       ;; Indent the expanded log entry.
 341       (indent-region (point-min) (point-max) 2)
 342       (goto-char (point-max))
 343       (buffer-string))))
 344
 345 (defun vc-hg-revision-table (files)
 346   (let ((default-directory (file-name-directory (car files))))
 347     (with-temp-buffer
 348       (vc-hg-command t nil files "log" "--template" "{rev} ")
 349       (split-string
 350        (buffer-substring-no-properties (point-min) (point-max))))))
 351
 352 ;; Modeled after the similar function in vc-cvs.el
 353 (defun vc-hg-revision-completion-table (files)
 354   (letrec ((table (lazy-completion-table
 355                    table (lambda () (vc-hg-revision-table files)))))
 356     table))
 357
 358 (defun vc-hg-annotate-command (file buffer &optional revision)
 359   "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
 360 Optional arg REVISION is a revision to annotate from."
 361   (vc-hg-command buffer 0 file "annotate" "-d" "-n" "--follow"
 362                  (when revision (concat "-r" revision))))
 363
 364 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 365
 366 ;; The format for one line output by "hg annotate -d -n" looks like this:
 367 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
 368 ;; i.e: VERSION_NUMBER DATE: CONTENTS
 369 ;; If the user has set the "--follow" option, the output looks like:
 370 ;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
 371 ;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
 372 (defconst vc-hg-annotate-re
 373   "^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)\\(?:\\(: \\)\\|\\(?: +\\([^:\n]+\\(?::\\(?:[^: \n][^:\n]*\\)?\\)*\\): \\)\\)")
 374
 375 (defun vc-hg-annotate-time ()
 376   (when (looking-at vc-hg-annotate-re)
 377     (goto-char (match-end 0))
 378     (vc-annotate-convert-time
 379      (date-to-time (match-string-no-properties 2)))))
 380
 381 (defun vc-hg-annotate-extract-revision-at-line ()
 382   (save-excursion
 383     (beginning-of-line)
 384     (when (looking-at vc-hg-annotate-re)
 385       (if (match-beginning 3)
 386           (match-string-no-properties 1)
 387         (cons (match-string-no-properties 1)
 388       (expand-file-name (match-string-no-properties 4)
 389  (vc-hg-root default-directory)))))))
 390
 391 ;;; Tag system
 392
 393 (defun vc-hg-create-tag (dir name branchp)
 394   "Attach the tag NAME to the state of the working copy."
 395   (let ((default-directory dir))
 396     (and (vc-hg-command nil 0 nil "status")
 397          (vc-hg-command nil 0 nil (if branchp "bookmark" "tag") name))))
 398
 399 (defun vc-hg-retrieve-tag (dir name _update)
 400   "Retrieve the version tagged by NAME of all registered files at or below DIR."
 401   (let ((default-directory dir))
 402     (vc-hg-command nil 0 nil "update" name)
 403     ;; FIXME: update buffers if `update' is true
 404     ;; TODO: update *vc-change-log* buffer so can see @ if --graph
 405     ))
 406
 407 ;;; Miscellaneous
 408
 409 (defun vc-hg-previous-revision (_file rev)
 410   (let ((newrev (1- (string-to-number rev))))
 411     (when (>= newrev 0)
 412       (number-to-string newrev))))
 413
 414 (defun vc-hg-next-revision (_file rev)
 415   (let ((newrev (1+ (string-to-number rev)))
 416         (tip-revision
 417          (with-temp-buffer
 418            (vc-hg-command t 0 nil "tip" "--style=default")
 419            (goto-char (point-min))
 420            (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
 421            (string-to-number (match-string-no-properties 1)))))
 422     ;; We don't want to exceed the maximum possible revision number, ie
 423     ;; the tip revision.
 424     (when (<= newrev tip-revision)
 425       (number-to-string newrev))))
 426
 427 ;; Modeled after the similar function in vc-bzr.el
 428 (defun vc-hg-delete-file (file)
 429   "Delete FILE and delete it in the hg repository."
 430   (condition-case ()
 431       (delete-file file)
 432     (file-error nil))
 433   (vc-hg-command nil 0 file "remove" "--after" "--force"))
 434
 435 ;; Modeled after the similar function in vc-bzr.el
 436 (defun vc-hg-rename-file (old new)
 437   "Rename file from OLD to NEW using `hg mv'."
 438   (vc-hg-command nil 0 new "mv" old))
 439
 440 (defun vc-hg-register (files &optional _comment)
 441   "Register FILES under hg. COMMENT is ignored."
 442   (vc-hg-command nil 0 files "add"))
 443
 444 (defun vc-hg-create-repo ()
 445   "Create a new Mercurial repository."
 446   (vc-hg-command nil 0 nil "init"))
 447
 448 (defalias 'vc-hg-responsible-p 'vc-hg-root)
 449
 450 (defun vc-hg-unregister (file)
 451   "Unregister FILE from hg."
 452   (vc-hg-command nil 0 file "forget"))
 453
 454 (declare-function log-edit-extract-headers "log-edit" (headers string))
 455
 456 (defun vc-hg-checkin (files comment)
 457   "Hg-specific version of `vc-backend-checkin'.
 458 REV is ignored."
 459   (apply 'vc-hg-command nil 0 files
 460          (nconc (list "commit" "-m")
 461                 (log-edit-extract-headers '(("Author" . "--user")
 462                                             ("Date" . "--date"))
 463                                           comment))))
 464
 465 (defun vc-hg-find-revision (file rev buffer)
 466   (let ((coding-system-for-read 'binary)
 467         (coding-system-for-write 'binary))
 468     (if rev
 469         (vc-hg-command buffer 0 file "cat" "-r" rev)
 470       (vc-hg-command buffer 0 file "cat"))))
 471
 472 (defun vc-hg-find-ignore-file (file)
 473   "Return the root directory of the repository of FILE."
 474   (expand-file-name ".hgignore"
 475                     (vc-hg-root file)))
 476
 477 ;; Modeled after the similar function in vc-bzr.el
 478 (defun vc-hg-checkout (file &optional rev)
 479   "Retrieve a revision of FILE.
 480 EDITABLE is ignored.
 481 REV is the revision to check out into WORKFILE."
 482   (let ((coding-system-for-read 'binary)
 483         (coding-system-for-write 'binary))
 484   (with-current-buffer (or (get-file-buffer file) (current-buffer))
 485     (if rev
 486         (vc-hg-command t 0 file "cat" "-r" rev)
 487       (vc-hg-command t 0 file "cat")))))
 488
 489 (defun vc-hg-resolve-when-done ()
 490   "Call \"hg resolve -m\" if the conflict markers have been removed."
 491   (save-excursion
 492     (goto-char (point-min))
 493     (unless (re-search-forward "^<<<<<<< " nil t)
 494       (vc-hg-command nil 0 buffer-file-name "resolve" "-m")
 495       ;; Remove the hook so that it is not called multiple times.
 496       (remove-hook 'after-save-hook 'vc-hg-resolve-when-done t))))
 497
 498 (defun vc-hg-find-file-hook ()
 499   (when (and buffer-file-name
 500              (file-exists-p (concat buffer-file-name ".orig"))
 501              ;; Hg does not seem to have a "conflict" status, eg
 502              ;; hg http://bz.selenic.com/show_bug.cgi?id=2724
 503              (memq (vc-file-getprop buffer-file-name 'vc-state)
 504                    '(edited conflict))
 505              ;; Maybe go on to check that "hg resolve -l" says "U"?
 506              ;; If "hg resolve -l" says there's a conflict but there are no
 507              ;; conflict markers, it's not clear what we should do.
 508              (save-excursion
 509                (goto-char (point-min))
 510                (re-search-forward "^<<<<<<< " nil t)))
 511     ;; Hg may not recognize "conflict" as a state, but we can do better.
 512     (vc-file-setprop buffer-file-name 'vc-state 'conflict)
 513     (smerge-start-session)
 514     (add-hook 'after-save-hook 'vc-hg-resolve-when-done nil t)
 515     (message "There are unresolved conflicts in this file")))
 516
 517
 518 ;; Modeled after the similar function in vc-bzr.el
 519 (defun vc-hg-revert (file &optional contents-done)
 520   (unless contents-done
 521     (with-temp-buffer (vc-hg-command t 0 file "revert"))))
 522
 523 ;;; Hg specific functionality.
 524
 525 (defvar vc-hg-extra-menu-map
 526   (let ((map (make-sparse-keymap)))
 527     map))
 528
 529 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
 530
 531 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
 532
 533 (defvar log-view-vc-backend)
 534
 535 (cl-defstruct (vc-hg-extra-fileinfo
 536             (:copier nil)
 537             (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
 538             (:conc-name vc-hg-extra-fileinfo->))
 539   rename-state        ;; rename or copy state
 540   extra-name)         ;; original name for copies and rename targets, new name for
 541
 542 (declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
 543
 544 (defun vc-hg-dir-printer (info)
 545   "Pretty-printer for the vc-dir-fileinfo structure."
 546   (let ((extra (vc-dir-fileinfo->extra info)))
 547     (vc-default-dir-printer 'Hg info)
 548     (when extra
 549       (insert (propertize
 550                (format "   (%s %s)"
 551                        (pcase (vc-hg-extra-fileinfo->rename-state extra)
 552                          (`copied "copied from")
 553                          (`renamed-from "renamed from")
 554                          (`renamed-to "renamed to"))
 555                        (vc-hg-extra-fileinfo->extra-name extra))
 556                'face 'font-lock-comment-face)))))
 557
 558 (defun vc-hg-after-dir-status (update-function)
 559   (let ((file nil)
 560         (translation '((?= . up-to-date)
 561                        (?C . up-to-date)
 562                        (?A . added)
 563                        (?R . removed)
 564                        (?M . edited)
 565                        (?I . ignored)
 566                        (?! . missing)
 567                        (?  . copy-rename-line)
 568                        (?? . unregistered)))
 569         (translated nil)
 570         (result nil)
 571         (last-added nil)
 572         (last-line-copy nil))
 573       (goto-char (point-min))
 574       (while (not (eobp))
 575         (setq translated (cdr (assoc (char-after) translation)))
 576         (setq file
 577               (buffer-substring-no-properties (+ (point) 2)
 578                                               (line-end-position)))
 579         (cond ((not translated)
 580                (setq last-line-copy nil))
 581               ((eq translated 'up-to-date)
 582                (setq last-line-copy nil))
 583               ((eq translated 'copy-rename-line)
 584                ;; For copied files the output looks like this:
 585                ;; A COPIED_FILE_NAME
 586                ;;   ORIGINAL_FILE_NAME
 587                (setf (nth 2 last-added)
 588                      (vc-hg-create-extra-fileinfo 'copied file))
 589                (setq last-line-copy t))
 590               ((and last-line-copy (eq translated 'removed))
 591                ;; For renamed files the output looks like this:
 592                ;; A NEW_FILE_NAME
 593                ;;   ORIGINAL_FILE_NAME
 594                ;; R ORIGINAL_FILE_NAME
 595                ;; We need to adjust the previous entry to not think it is a copy.
 596                (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
 597                      'renamed-from)
 598                (push (list file translated
 599                            (vc-hg-create-extra-fileinfo
 600                             'renamed-to (nth 0 last-added))) result)
 601                (setq last-line-copy nil))
 602               (t
 603                (setq last-added (list file translated nil))
 604                (push last-added result)
 605                (setq last-line-copy nil)))
 606         (forward-line))
 607       (funcall update-function result)))
 608
 609 ;; Follows vc-hg-command (or vc-do-async-command), which uses vc-do-command
 610 ;; from vc-dispatcher.
 611 (declare-function vc-exec-after "vc-dispatcher" (code))
 612 ;; Follows vc-exec-after.
 613 (declare-function vc-set-async-update "vc-dispatcher" (process-buffer))
 614
 615 (defun vc-hg-dir-status-files (dir files update-function)
 616   (apply 'vc-hg-command (current-buffer) 'async dir "status"
 617          (concat "-mardu" (if files "i"))
 618          "-C" files)
 619   (vc-run-delayed
 620     (vc-hg-after-dir-status update-function)))
 621
 622 (defun vc-hg-dir-extra-header (name &rest commands)
 623   (concat (propertize name 'face 'font-lock-type-face)
 624           (propertize
 625            (with-temp-buffer
 626              (apply 'vc-hg-command (current-buffer) 0 nil commands)
 627              (buffer-substring-no-properties (point-min) (1- (point-max))))
 628            'face 'font-lock-variable-name-face)))
 629
 630 (defun vc-hg-dir-extra-headers (dir)
 631   "Generate extra status headers for a Mercurial tree."
 632   (let ((default-directory dir))
 633     (concat
 634      (vc-hg-dir-extra-header "Root       : " "root") "\n"
 635      (vc-hg-dir-extra-header "Branch     : " "id" "-b") "\n"
 636      (vc-hg-dir-extra-header "Tags       : " "id" "-t") ; "\n"
 637      ;; these change after each commit
 638      ;; (vc-hg-dir-extra-header "Local num  : " "id" "-n") "\n"
 639      ;; (vc-hg-dir-extra-header "Global id  : " "id" "-i")
 640      )))
 641
 642 (defun vc-hg-log-incoming (buffer remote-location)
 643   (vc-hg-command buffer 1 nil "incoming" "-n" (unless (string= remote-location "")
 644                                                 remote-location)))
 645
 646 (defun vc-hg-log-outgoing (buffer remote-location)
 647   (vc-hg-command buffer 1 nil "outgoing" "-n" (unless (string= remote-location "")
 648                                                 remote-location)))
 649
 650 (declare-function log-view-get-marked "log-view" ())
 651
 652 ;; XXX maybe also add key bindings for these functions.
 653 (defun vc-hg-push ()
 654   (interactive)
 655   (let ((marked-list (log-view-get-marked)))
 656     (if marked-list
 657         (apply #'vc-hg-command
 658                nil 0 nil
 659                "push"
 660                (apply 'nconc
 661                       (mapcar (lambda (arg) (list "-r" arg)) marked-list)))
 662       (error "No log entries selected for push"))))
 663
 664 (defvar vc-hg-error-regexp-alist nil
 665   ;; 'hg pull' does not list modified files, so, for now, the only
 666   ;; benefit of `vc-compilation-mode' is that one can get rid of
 667   ;; *vc-hg* buffer with 'q' or 'z'.
 668   ;; TODO: call 'hg incoming' before pull/merge to get the list of
 669   ;;       modified files
 670   "Value of `compilation-error-regexp-alist' in *vc-hg* buffers.")
 671
 672 (autoload 'vc-do-async-command "vc-dispatcher")
 673
 674 (defun vc-hg-pull (prompt)
 675   "Issue a Mercurial pull command.
 676 If called interactively with a set of marked Log View buffers,
 677 call \"hg pull -r REVS\" to pull in the specified revisions REVS.
 678
 679 With a prefix argument or if PROMPT is non-nil, prompt for a
 680 specific Mercurial pull command.  The default is \"hg pull -u\",
 681 which fetches changesets from the default remote repository and
 682 then attempts to update the working directory."
 683   (interactive "P")
 684   (let (marked-list)
 685     ;; The `vc-hg-pull' command existed before the `pull' VC action
 686     ;; was implemented.  Keep it for backward compatibility.
 687     (if (and (called-interactively-p 'interactive)
 688              (setq marked-list (log-view-get-marked)))
 689         (apply #'vc-hg-command
 690                nil 0 nil
 691                "pull"
 692                (apply 'nconc
 693                       (mapcar (lambda (arg) (list "-r" arg))
 694                               marked-list)))
 695       (let* ((root (vc-hg-root default-directory))
 696              (buffer (format "*vc-hg : %s*" (expand-file-name root)))
 697              (command "pull")
 698              (hg-program vc-hg-program)
 699              ;; Fixme: before updating the working copy to the latest
 700              ;; state, should check if it's visiting an old revision.
 701              (args '("-u")))
 702         ;; If necessary, prompt for the exact command.
 703         (when prompt
 704           (setq args (split-string
 705                       (read-shell-command "Run Hg (like this): "
 706                                           (format "%s pull -u" hg-program)
 707                                           'vc-hg-history)
 708                       " " t))
 709           (setq hg-program (car  args)
 710                 command    (cadr args)
 711                 args       (cddr args)))
 712         (apply 'vc-do-async-command buffer root hg-program
 713                command args)
 714         (with-current-buffer buffer
 715           (vc-run-delayed (vc-compilation-mode 'hg)))
 716         (vc-set-async-update buffer)))))
 717
 718 (defun vc-hg-merge-branch ()
 719   "Merge incoming changes into the current working directory.
 720 This runs the command \"hg merge\"."
 721   (let* ((root (vc-hg-root default-directory))
 722          (buffer (format "*vc-hg : %s*" (expand-file-name root))))
 723     (apply 'vc-do-async-command buffer root vc-hg-program '("merge"))
 724     (with-current-buffer buffer (vc-run-delayed (vc-compilation-mode 'hg)))
 725     (vc-set-async-update buffer)))
 726
 727 ;;; Internal functions
 728
 729 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
 730   "A wrapper around `vc-do-command' for use in vc-hg.el.
 731 This function differs from vc-do-command in that it invokes
 732 `vc-hg-program', and passes `vc-hg-global-switches' to it before FLAGS."
 733   (apply 'vc-do-command (or buffer "*vc*") okstatus vc-hg-program file-or-list
 734          (if (stringp vc-hg-global-switches)
 735              (cons vc-hg-global-switches flags)
 736            (append vc-hg-global-switches
 737                    flags))))
 738
 739 (defun vc-hg-root (file)
 740   (vc-find-root file ".hg"))
 741
 742 (provide 'vc-hg)
 743
 744 ;;; vc-hg.el ends here