1 ;;; vc-hg.el --- VC backend for the mercurial version control system
3 ;; Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
8 ;; This file is part of GNU Emacs.
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.
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.
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/>.
25 ;; This is a mercurial version control backend
35 ;; 1) Implement the rest of the vc interface. See the comment at the
36 ;; beginning of vc.el. The current status is:
38 ;; FUNCTION NAME STATUS
40 ;; * revision-granularity OK
41 ;; STATE-QUERYING FUNCTIONS
42 ;; * registered (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
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
80 ;; - create-snapshot (dir name branchp) NEEDED (probably branch?)
81 ;; - assign-name (file name) NOT NEEDED
82 ;; - retrieve-snapshot (dir name update) ?? NEEDED??
84 ;; - make-version-backups-p (file) ??
85 ;; - repository-hostname (dirname) ??
86 ;; - previous-revision (file rev) OK
87 ;; - next-revision (file rev) OK
88 ;; - check-headers () ??
89 ;; - clear-headers () ??
90 ;; - delete-file (file) TEST IT
91 ;; - rename-file (old new) OK
92 ;; - find-file-hook () PROBABLY NOT NEEDED
93 ;; - find-file-not-found-hook () PROBABLY NOT NEEDED
95 ;; 2) Implement Stefan Monnier's advice:
96 ;; vc-hg-registered and vc-hg-state
97 ;; Both of those functions should be super extra careful to fail gracefully in
98 ;; unexpected circumstances. The reason this is important is that any error
99 ;; there will prevent the user from even looking at the file :-(
100 ;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
101 ;; mercurial's control and extracting the current revision should be done
102 ;; without even using `hg' (this way even if you don't have `hg' installed,
103 ;; Emacs is able to tell you this file is under mercurial's control).
114 ;;; Customization options
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"
127 ;;; Properties of the backend
129 (defun vc-hg-revision-granularity () 'repository
)
130 (defun vc-hg-checkout-model (files) 'implicit
)
132 ;;; State querying functions
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))))
141 ;; Modelled 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 (vc-file-setprop file
'vc-state state
)
147 (and state
(not (memq state
'(ignored unregistered
)))))))
149 (defun vc-hg-state (file)
150 "Hg-specific version of `vc-state'."
154 (with-output-to-string
159 ;; Ignore all errors.
161 "hg" nil t nil
"--cwd" (file-name-directory file
)
162 "status" "-A" (file-name-nondirectory file
))
163 ;; Some problem happened. E.g. We can't find an `hg'
167 (when (null (string-match ".*: No such file or directory$" out
))
168 (let ((state (aref out
0)))
170 ((eq state ?
=) 'up-to-date
)
171 ((eq state ?A
) 'added
)
172 ((eq state ?M
) 'edited
)
173 ((eq state ?I
) 'ignored
)
174 ((eq state ?R
) 'removed
)
175 ((eq state ?
!) 'missing
)
176 ((eq state ??
) 'unregistered
)
177 ((eq state ?C
) 'up-to-date
) ;; Older mercurials use this
178 (t 'up-to-date
)))))))
180 (defun vc-hg-working-revision (file)
181 "Hg-specific version of `vc-working-revision'."
185 (with-output-to-string
190 ;; Ignore all errors.
192 "hg" nil t nil
"--cwd" (file-name-directory file
)
193 "log" "-l1" (file-name-nondirectory file
))
194 ;; Some problem happened. E.g. We can't find an `hg'
198 (if (string-match "changeset: *\\([0-9]*\\)" out
)
202 ;;; History functions
204 (defun vc-hg-print-log (files &optional buffer
)
205 "Get change log associated with FILES."
206 ;; `log-view-mode' needs to have the file names in order to function
207 ;; correctly. "hg log" does not print it, so we insert it here by
210 ;; `vc-do-command' creates the buffer, but we need it before running
212 (vc-setup-buffer buffer
)
213 ;; If the buffer exists from a previous invocation it might be
215 (let ((inhibit-read-only t
))
216 ;; We need to loop and call "hg log" on each file separately.
217 ;; "hg log" with multiple file arguments mashes all the logs
218 ;; together. Ironically enough, this puts us back near CVS
219 ;; which can't generate proper fileset logs either.
223 (insert "Working file: " file
"\n")) ;; Like RCS/CVS.
224 (vc-hg-command buffer
0 file
"log"))))
226 (defvar log-view-message-re
)
227 (defvar log-view-file-re
)
228 (defvar log-view-font-lock-keywords
)
230 (define-derived-mode vc-hg-log-view-mode log-view-mode
"Hg-Log-View"
231 (require 'add-log
) ;; we need the add-log faces
232 (set (make-local-variable 'log-view-file-re
) "^Working file:[ \t]+\\(.+\\)")
233 (set (make-local-variable 'log-view-message-re
)
234 "^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)")
235 (set (make-local-variable 'log-view-font-lock-keywords
)
237 log-view-font-lock-keywords
240 ;; user: FirstName LastName <foo@bar>
241 ("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
243 (2 'change-log-email
))
248 ("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
249 (1 'change-log-email
))
250 ("^date: \\(.+\\)" (1 'change-log-date
))
251 ("^summary:[ \t]+\\(.+\\)" (1 'log-view-message
))))))
253 (defun vc-hg-diff (files &optional oldvers newvers buffer
)
254 "Get a difference report using hg between two revisions of FILES."
255 (let ((working (vc-working-revision (car files
))))
256 (when (and (equal oldvers working
) (not newvers
))
258 (when (and (not oldvers
) newvers
)
259 (setq oldvers working
))
260 (apply #'vc-hg-command
(or buffer
"*vc-diff*") nil
261 (mapcar (lambda (file) (file-name-nondirectory file
)) files
)
262 "--cwd" (file-name-directory (car files
))
267 (list "-r" oldvers
"-r" newvers
)
268 (list "-r" oldvers
)))))))
270 (defun vc-hg-revision-table (files)
271 (let ((default-directory (file-name-directory (car files
))))
273 (vc-hg-command t nil files
"log" "--template" "{rev} ")
275 (buffer-substring-no-properties (point-min) (point-max))))))
277 ;; Modelled after the similar function in vc-cvs.el
278 (defun vc-hg-revision-completion-table (files)
279 (lexical-let ((files files
)
281 (setq table
(lazy-completion-table
282 table
(lambda () (vc-hg-revision-table files
))))
285 (defun vc-hg-annotate-command (file buffer
&optional revision
)
286 "Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
287 Optional arg REVISION is a revision to annotate from."
288 (vc-hg-command buffer
0 file
"annotate" "-d" "-n"
289 (when revision
(concat "-r" revision
)))
290 (with-current-buffer buffer
291 (goto-char (point-min))
292 (re-search-forward "^[0-9]")
293 (delete-region (point-min) (1- (point)))))
296 ;; The format for one line output by "hg annotate -d -n" looks like this:
297 ;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
298 ;; i.e: VERSION_NUMBER DATE: CONTENTS
299 (defconst vc-hg-annotate-re
"^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\): ")
301 (defun vc-hg-annotate-time ()
302 (when (looking-at vc-hg-annotate-re
)
303 (goto-char (match-end 0))
304 (vc-annotate-convert-time
305 (date-to-time (match-string-no-properties 2)))))
307 (defun vc-hg-annotate-extract-revision-at-line ()
310 (if (looking-at vc-hg-annotate-re
) (match-string-no-properties 1))))
312 (defun vc-hg-previous-revision (file rev
)
313 (let ((newrev (1- (string-to-number rev
))))
315 (number-to-string newrev
))))
317 (defun vc-hg-next-revision (file rev
)
318 (let ((newrev (1+ (string-to-number rev
)))
321 (vc-hg-command t
0 nil
"tip")
322 (goto-char (point-min))
323 (re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
324 (string-to-number (match-string-no-properties 1)))))
325 ;; We don't want to exceed the maximum possible revision number, ie
327 (when (<= newrev tip-revision
)
328 (number-to-string newrev
))))
330 ;; Modelled after the similar function in vc-bzr.el
331 (defun vc-hg-delete-file (file)
332 "Delete FILE and delete it in the hg repository."
336 (vc-hg-command nil
0 file
"remove" "--after" "--force"))
338 ;; Modelled after the similar function in vc-bzr.el
339 (defun vc-hg-rename-file (old new
)
340 "Rename file from OLD to NEW using `hg mv'."
341 (vc-hg-command nil
0 new
"mv" old
))
343 (defun vc-hg-register (files &optional rev comment
)
344 "Register FILES under hg.
347 (vc-hg-command nil
0 files
"add"))
349 (defun vc-hg-create-repo ()
350 "Create a new Mercurial repository."
351 (vc-hg-command nil
0 nil
"init"))
353 (defalias 'vc-hg-responsible-p
'vc-hg-root
)
355 ;; Modelled after the similar function in vc-bzr.el
356 (defun vc-hg-could-register (file)
357 "Return non-nil if FILE could be registered under hg."
358 (and (vc-hg-responsible-p file
) ; shortcut
361 (vc-hg-command t nil file
"add" "--dry-run"))
362 ;; The command succeeds with no output if file is
366 ;; XXX This would remove the file. Is that correct?
367 ;; (defun vc-hg-unregister (file)
368 ;; "Unregister FILE from hg."
369 ;; (vc-hg-command nil nil file "remove"))
371 (defun vc-hg-checkin (files rev comment
)
372 "Hg-specific version of `vc-backend-checkin'.
374 (vc-hg-command nil
0 files
"commit" "-m" comment
))
376 (defun vc-hg-find-revision (file rev buffer
)
377 (let ((coding-system-for-read 'binary
)
378 (coding-system-for-write 'binary
))
380 (vc-hg-command buffer
0 file
"cat" "-r" rev
)
381 (vc-hg-command buffer
0 file
"cat"))))
383 ;; Modelled after the similar function in vc-bzr.el
384 (defun vc-hg-checkout (file &optional editable rev
)
385 "Retrieve a revision of FILE.
387 REV is the revision to check out into WORKFILE."
388 (let ((coding-system-for-read 'binary
)
389 (coding-system-for-write 'binary
))
390 (with-current-buffer (or (get-file-buffer file
) (current-buffer))
392 (vc-hg-command t
0 file
"cat" "-r" rev
)
393 (vc-hg-command t
0 file
"cat")))))
395 ;; Modelled after the similar function in vc-bzr.el
396 (defun vc-hg-workfile-unchanged-p (file)
397 (eq 'up-to-date
(vc-hg-state file
)))
399 ;; Modelled after the similar function in vc-bzr.el
400 (defun vc-hg-revert (file &optional contents-done
)
401 (unless contents-done
402 (with-temp-buffer (vc-hg-command t
0 file
"revert"))))
404 ;;; Hg specific functionality.
406 (defvar vc-hg-extra-menu-map
407 (let ((map (make-sparse-keymap)))
408 (define-key map
[incoming] '(menu-item "Show incoming" vc-hg-incoming))
409 (define-key map [outgoing] '(menu-item "Show outgoing" vc-hg-outgoing))
412 (defun vc-hg-extra-menu () vc-hg-extra-menu-map)
414 (defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
416 (define-derived-mode vc-hg-outgoing-mode vc-hg-log-view-mode "Hg-Outgoing")
418 (define-derived-mode vc-hg-incoming-mode vc-hg-log-view-mode "Hg-Incoming")
420 (defstruct (vc-hg-extra-fileinfo
422 (:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
423 (:conc-name vc-hg-extra-fileinfo->))
424 rename-state ;; rename or copy state
425 extra-name) ;; original name for copies and rename targets, new name for
427 (defun vc-hg-status-printer (info)
428 "Pretty-printer for the vc-dir-fileinfo structure."
429 (let ((extra (vc-dir-fileinfo->extra info)))
430 (vc-default-status-printer 'Hg info)
434 (case (vc-hg-extra-fileinfo->rename-state extra)
435 ('copied "copied from")
436 ('renamed-from "renamed from")
437 ('renamed-to "renamed to"))
438 (vc-hg-extra-fileinfo->extra-name extra))
439 'face 'font-lock-comment-face)))))
441 (defun vc-hg-after-dir-status (update-function)
442 (let ((status-char nil)
444 (translation '((?= . up-to-date)
451 (? . copy-rename-line)
452 (?? . unregistered)))
456 (last-line-copy nil))
457 (goto-char (point-min))
459 (setq translated (cdr (assoc (char-after) translation)))
461 (buffer-substring-no-properties (+ (point) 2)
462 (line-end-position)))
463 (cond ((not translated)
464 (setq last-line-copy nil))
465 ((eq translated 'up-to-date)
466 (setq last-line-copy nil))
467 ((eq translated 'copy-rename-line)
468 ;; For copied files the output looks like this:
469 ;; A COPIED_FILE_NAME
470 ;; ORIGINAL_FILE_NAME
471 (setf (nth 2 last-added)
472 (vc-hg-create-extra-fileinfo 'copied file))
473 (setq last-line-copy t))
474 ((and last-line-copy (eq translated 'removed))
475 ;; For renamed files the output looks like this:
477 ;; ORIGINAL_FILE_NAME
478 ;; R ORIGINAL_FILE_NAME
479 ;; We need to adjust the previous entry to not think it is a copy.
480 (setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
482 (push (list file translated
483 (vc-hg-create-extra-fileinfo
484 'renamed-to (nth 0 last-added))) result)
485 (setq last-line-copy nil))
487 (setq last-added (list file translated nil))
488 (push last-added result)
489 (setq last-line-copy nil)))
491 (funcall update-function result)))
493 (defun vc-hg-dir-status (dir update-function)
494 (vc-hg-command (current-buffer) 'async dir "status" "-C")
496 `(vc-hg-after-dir-status (quote ,update-function))))
498 ;; XXX this adds another top level menu, instead figure out how to
499 ;; replace the Log-View menu.
500 (easy-menu-define log-view-mode-menu vc-hg-outgoing-mode-map
501 "Hg-outgoing Display Menu"
503 ["Push selected" vc-hg-push]))
505 (easy-menu-define log-view-mode-menu vc-hg-incoming-mode-map
506 "Hg-incoming Display Menu"
508 ["Pull selected" vc-hg-pull]))
510 (defun vc-hg-outgoing ()
512 (let ((bname "*Hg outgoing*"))
513 (vc-hg-command bname 0 nil "outgoing" "-n")
514 (pop-to-buffer bname)
515 (vc-hg-outgoing-mode)))
517 (defun vc-hg-incoming ()
519 (let ((bname "*Hg incoming*"))
520 (vc-hg-command bname 0 nil "incoming" "-n")
521 (pop-to-buffer bname)
522 (vc-hg-incoming-mode)))
524 (declare-function log-view-get-marked "log-view" ())
526 ;; XXX maybe also add key bindings for these functions.
529 (let ((marked-list (log-view-get-marked)))
535 (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
536 (error "No log entries selected for push"))))
540 (let ((marked-list (log-view-get-marked)))
546 (mapcar (lambda (arg) (list "-r" arg)) marked-list))))
547 (error "No log entries selected for pull"))))
549 ;;; Internal functions
551 (defun vc-hg-command (buffer okstatus file-or-list &rest flags)
552 "A wrapper around `vc-do-command' for use in vc-hg.el.
553 The difference to vc-do-command is that this function always invokes `hg',
554 and that it passes `vc-hg-global-switches' to it before FLAGS."
555 (apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
556 (if (stringp vc-hg-global-switches)
557 (cons vc-hg-global-switches flags)
558 (append vc-hg-global-switches
561 (defun vc-hg-root (file)
562 (vc-find-root file ".hg"))
566 ;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
567 ;;; vc-hg.el ends here