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1 | ;;; tramp-vc.el --- Version control integration for TRAMP.el |
2 | ||
3 | ;; Copyright (C) 2000 by Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Daniel Pittman <daniel@danann.net> | |
6 | ;; Keywords: comm, processes | |
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 2, or (at your option) | |
13 | ;; 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; see the file COPYING. If not, write to the | |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; See the main module, 'tramp.el' for discussion of the purpose of TRAMP. | |
28 | ;; This module provides integration between remote files accessed by TRAMP and | |
29 | ;; the Emacs version control system. | |
30 | ||
31 | ;;; Code: | |
32 | ||
33 | (eval-when-compile | |
34 | (require 'cl)) | |
35 | (require 'vc) | |
36 | ;; Old VC defines vc-rcs-release in vc.el, new VC requires extra module. | |
37 | (unless (boundp 'vc-rcs-release) | |
38 | (require 'vc-rcs)) | |
39 | (require 'tramp) | |
40 | ||
41 | ;; -- vc -- | |
42 | ||
43 | ;; This used to blow away the file-name-handler-alist and reinstall | |
44 | ;; TRAMP into it. This was intended to let VC work remotely. It didn't, | |
45 | ;; at least not in my XEmacs 21.2 install. | |
7432277c | 46 | ;; |
fb7933a3 KG |
47 | ;; In any case, tramp-run-real-handler now deals correctly with disabling |
48 | ;; the things that should be, making this a no-op. | |
49 | ;; | |
50 | ;; I have removed it from the tramp-file-name-handler-alist because the | |
51 | ;; shortened version does nothing. This is for reference only now. | |
52 | ;; | |
53 | ;; Daniel Pittman <daniel@danann.net> | |
54 | ;; | |
55 | ;; (defun tramp-handle-vc-registered (file) | |
56 | ;; "Like `vc-registered' for tramp files." | |
57 | ;; (tramp-run-real-handler 'vc-registered (list file))) | |
58 | ||
59 | ;; `vc-do-command' | |
60 | ;; This function does not deal well with remote files, so we define | |
61 | ;; our own version and make a backup of the original function and | |
62 | ;; call our version for tramp files and the original version for | |
63 | ;; normal files. | |
64 | ||
65 | ;; The following function is pretty much copied from vc.el, but | |
66 | ;; the part that actually executes a command is changed. | |
67 | ;; CCC: this probably works for Emacs 21, too. | |
68 | (defun tramp-vc-do-command (buffer okstatus command file last &rest flags) | |
69 | "Like `vc-do-command' but invoked for tramp files. | |
70 | See `vc-do-command' for more information." | |
71 | (save-match-data | |
72 | (and file (setq file (tramp-handle-expand-file-name file))) | |
73 | (if (not buffer) (setq buffer "*vc*")) | |
74 | (if vc-command-messages | |
75 | (message "Running `%s' on `%s'..." command file)) | |
76 | (let ((obuf (current-buffer)) (camefrom (current-buffer)) | |
77 | (squeezed nil) | |
78 | (olddir default-directory) | |
79 | vc-file status) | |
80 | (let* ((v (tramp-dissect-file-name (tramp-handle-expand-file-name file))) | |
81 | (multi-method (tramp-file-name-multi-method v)) | |
82 | (method (tramp-file-name-method v)) | |
83 | (user (tramp-file-name-user v)) | |
84 | (host (tramp-file-name-host v)) | |
7432277c | 85 | (localname (tramp-file-name-localname v))) |
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86 | (set-buffer (get-buffer-create buffer)) |
87 | (set (make-local-variable 'vc-parent-buffer) camefrom) | |
88 | (set (make-local-variable 'vc-parent-buffer-name) | |
89 | (concat " from " (buffer-name camefrom))) | |
90 | (setq default-directory olddir) | |
7432277c | 91 | |
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92 | (erase-buffer) |
93 | ||
94 | (mapcar | |
95 | (function | |
96 | (lambda (s) (and s (setq squeezed (append squeezed (list s)))))) | |
97 | flags) | |
98 | (if (and (eq last 'MASTER) file | |
99 | (setq vc-file (vc-name file))) | |
100 | (setq squeezed | |
101 | (append squeezed | |
7432277c | 102 | (list (tramp-file-name-localname |
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103 | (tramp-dissect-file-name vc-file)))))) |
104 | (if (and file (eq last 'WORKFILE)) | |
105 | (progn | |
106 | (let* ((pwd (expand-file-name default-directory)) | |
107 | (preflen (length pwd))) | |
108 | (if (string= (substring file 0 preflen) pwd) | |
109 | (setq file (substring file preflen)))) | |
110 | (setq squeezed (append squeezed (list file))))) | |
111 | ;; Unless we (save-window-excursion) the layout of windows in | |
112 | ;; the current frame changes. This is painful, at best. | |
113 | ;; | |
114 | ;; As a point of note, (save-excursion) is still here only because | |
115 | ;; it preserves (point) in the current buffer. (save-window-excursion) | |
116 | ;; does not, at least under XEmacs 21.2. | |
117 | ;; | |
118 | ;; I trust that the FSF support this as well. I can't find useful | |
119 | ;; documentation to check :( | |
120 | ;; | |
121 | ;; Daniel Pittman <daniel@danann.net> | |
122 | (save-excursion | |
123 | (save-window-excursion | |
124 | ;; Actually execute remote command | |
125 | (tramp-handle-shell-command | |
126 | (mapconcat 'tramp-shell-quote-argument | |
127 | (cons command squeezed) " ") t) | |
128 | ;;(tramp-wait-for-output) | |
129 | ;; Get status from command | |
130 | (tramp-send-command multi-method method user host "echo $?") | |
131 | (tramp-wait-for-output) | |
132 | ;; Make sure to get status from last line of output. | |
133 | (goto-char (point-max)) (forward-line -1) | |
134 | (setq status (read (current-buffer))) | |
135 | (message "Command %s returned status %d." command status))) | |
136 | (goto-char (point-max)) | |
137 | (set-buffer-modified-p nil) | |
138 | (forward-line -1) | |
4007ba5b KG |
139 | (if (or (not (integerp status)) |
140 | (and (integerp okstatus) (< okstatus status))) | |
fb7933a3 KG |
141 | (progn |
142 | (pop-to-buffer buffer) | |
143 | (goto-char (point-min)) | |
144 | (shrink-window-if-larger-than-buffer) | |
145 | (error "Running `%s'...FAILED (%s)" command | |
146 | (if (integerp status) | |
147 | (format "status %d" status) | |
148 | status)) | |
149 | ) | |
150 | (if vc-command-messages | |
151 | (message "Running %s...OK" command)) | |
152 | ) | |
153 | (set-buffer obuf) | |
154 | status)) | |
155 | )) | |
156 | ||
157 | ;; Following code snarfed from Emacs 21 vc.el and slightly tweaked. | |
158 | (defun tramp-vc-do-command-new (buffer okstatus command file &rest flags) | |
159 | "Like `vc-do-command' but for TRAMP files. | |
160 | This function is for the new VC which comes with Emacs 21. | |
161 | Since TRAMP doesn't do async commands yet, this function doesn't, either." | |
162 | (and file (setq file (expand-file-name file))) | |
163 | (if vc-command-messages | |
164 | (message "Running %s on %s..." command file)) | |
165 | (save-current-buffer | |
166 | (unless (eq buffer t) (vc-setup-buffer buffer)) | |
167 | (let ((squeezed nil) | |
168 | (inhibit-read-only t) | |
169 | (status 0)) | |
170 | (let* ((v (when file (tramp-dissect-file-name file))) | |
171 | (multi-method (when file (tramp-file-name-multi-method v))) | |
172 | (method (when file (tramp-file-name-method v))) | |
173 | (user (when file (tramp-file-name-user v))) | |
174 | (host (when file (tramp-file-name-host v))) | |
7432277c | 175 | (localname (when file (tramp-file-name-localname v)))) |
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176 | (setq squeezed (delq nil (copy-sequence flags))) |
177 | (when file | |
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178 | (setq squeezed (append squeezed (list (file-relative-name |
179 | file default-directory))))) | |
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180 | (let ((w32-quote-process-args t)) |
181 | (when (eq okstatus 'async) | |
182 | (message "Tramp doesn't do async commands, running synchronously.")) | |
183 | (setq status (tramp-handle-shell-command | |
184 | (mapconcat 'tramp-shell-quote-argument | |
185 | (cons command squeezed) " ") t)) | |
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186 | (when (or (not (integerp status)) |
187 | (and (integerp okstatus) (< okstatus status))) | |
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188 | (pop-to-buffer (current-buffer)) |
189 | (goto-char (point-min)) | |
190 | (shrink-window-if-larger-than-buffer) | |
191 | (error "Running %s...FAILED (%s)" command | |
192 | (if (integerp status) (format "status %d" status) status)))) | |
193 | (if vc-command-messages | |
194 | (message "Running %s...OK" command)) | |
195 | (vc-exec-after | |
196 | `(run-hook-with-args | |
7432277c | 197 | 'vc-post-command-functions ',command ',localname ',flags)) |
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198 | status)))) |
199 | ||
200 | ||
201 | ;; The context for a VC command is the current buffer. | |
202 | ;; That makes a test on the buffers file more reliable than a test on the | |
203 | ;; arguments. | |
204 | ;; This is needed to handle remote VC correctly - else we test against the | |
205 | ;; local VC system and get things wrong... | |
206 | ;; Daniel Pittman <daniel@danann.net> | |
207 | ;;-(if (fboundp 'vc-call-backend) | |
208 | ;;- () ;; This is the new VC for which we don't have an appropriate advice yet | |
209 | (if (fboundp 'vc-call-backend) | |
210 | (defadvice vc-do-command | |
211 | (around tramp-advice-vc-do-command | |
212 | (buffer okstatus command file &rest flags) | |
213 | activate) | |
214 | "Invoke tramp-vc-do-command for tramp files." | |
215 | (let ((file (symbol-value 'file))) ;pacify byte-compiler | |
216 | (if (or (and (stringp file) (tramp-tramp-file-p file)) | |
217 | (and (buffer-file-name) (tramp-tramp-file-p (buffer-file-name)))) | |
218 | (setq ad-return-value | |
7432277c | 219 | (apply 'tramp-vc-do-command-new buffer okstatus command |
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220 | file ;(or file (buffer-file-name)) |
221 | flags)) | |
222 | ad-do-it))) | |
223 | (defadvice vc-do-command | |
224 | (around tramp-advice-vc-do-command | |
225 | (buffer okstatus command file last &rest flags) | |
226 | activate) | |
227 | "Invoke tramp-vc-do-command for tramp files." | |
228 | (let ((file (symbol-value 'file))) ;pacify byte-compiler | |
229 | (if (or (and (stringp file) (tramp-tramp-file-p file)) | |
230 | (and (buffer-file-name) (tramp-tramp-file-p (buffer-file-name)))) | |
231 | (setq ad-return-value | |
7432277c | 232 | (apply 'tramp-vc-do-command buffer okstatus command |
fb7933a3 KG |
233 | (or file (buffer-file-name)) last flags)) |
234 | ad-do-it)))) | |
235 | ;;-) | |
236 | ||
237 | ||
238 | ;; XEmacs uses this to do some of its work. Like vc-do-command, we | |
239 | ;; need to enhance it to make VC work via TRAMP-mode. | |
240 | ;; | |
241 | ;; Like the previous function, this is a cut-and-paste job from the VC | |
242 | ;; file. It's based on the vc-do-command code. | |
243 | ;; CCC: this isn't used in Emacs 21, so do as before. | |
244 | (defun tramp-vc-simple-command (okstatus command file &rest args) | |
245 | ;; Simple version of vc-do-command, for use in vc-hooks only. | |
246 | ;; Don't switch to the *vc-info* buffer before running the | |
247 | ;; command, because that would change its default directory | |
248 | (save-match-data | |
249 | (let* ((v (tramp-dissect-file-name (tramp-handle-expand-file-name file))) | |
250 | (multi-method (tramp-file-name-multi-method v)) | |
251 | (method (tramp-file-name-method v)) | |
252 | (user (tramp-file-name-user v)) | |
253 | (host (tramp-file-name-host v)) | |
7432277c | 254 | (localname (tramp-file-name-localname v))) |
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255 | (save-excursion (set-buffer (get-buffer-create "*vc-info*")) |
256 | (erase-buffer)) | |
257 | (let ((exec-path (append vc-path exec-path)) exec-status | |
258 | ;; Add vc-path to PATH for the execution of this command. | |
259 | (process-environment | |
260 | (cons (concat "PATH=" (getenv "PATH") | |
261 | path-separator | |
262 | (mapconcat 'identity vc-path path-separator)) | |
263 | process-environment))) | |
264 | ;; Call the actual process. See tramp-vc-do-command for discussion of | |
265 | ;; why this does both (save-window-excursion) and (save-excursion). | |
266 | ;; | |
267 | ;; As a note, I don't think that the process-environment stuff above | |
268 | ;; has any effect on the remote system. This is a hard one though as | |
269 | ;; there is no real reason to expect local and remote paths to be | |
270 | ;; identical... | |
271 | ;; | |
272 | ;; Daniel Pittman <daniel@danann.net> | |
273 | (save-excursion | |
274 | (save-window-excursion | |
275 | ;; Actually execute remote command | |
276 | (tramp-handle-shell-command | |
277 | (mapconcat 'tramp-shell-quote-argument | |
7432277c | 278 | (append (list command) args (list localname)) " ") |
fb7933a3 KG |
279 | (get-buffer-create"*vc-info*")) |
280 | ;(tramp-wait-for-output) | |
281 | ;; Get status from command | |
282 | (tramp-send-command multi-method method user host "echo $?") | |
283 | (tramp-wait-for-output) | |
284 | (setq exec-status (read (current-buffer))) | |
285 | (message "Command %s returned status %d." command exec-status))) | |
7432277c | 286 | |
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287 | ;; Maybe okstatus can be `async' here. But then, maybe the |
288 | ;; async thing is new in Emacs 21, but this function is only | |
289 | ;; used in Emacs 20. | |
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290 | (cond ((> exec-status okstatus) |
291 | (switch-to-buffer (get-file-buffer file)) | |
292 | (shrink-window-if-larger-than-buffer | |
293 | (display-buffer "*vc-info*")) | |
294 | (error "Couldn't find version control information"))) | |
295 | exec-status)))) | |
296 | ||
297 | ;; This function does not exist any more in Emacs-21's VC | |
298 | (defadvice vc-simple-command | |
299 | (around tramp-advice-vc-simple-command | |
300 | (okstatus command file &rest args) | |
301 | activate) | |
302 | "Invoke tramp-vc-simple-command for tramp files." | |
303 | (let ((file (symbol-value 'file))) ;pacify byte-compiler | |
304 | (if (or (and (stringp file) (tramp-tramp-file-p file)) | |
305 | (and (buffer-file-name) (tramp-tramp-file-p (buffer-file-name)))) | |
306 | (setq ad-return-value | |
7432277c | 307 | (apply 'tramp-vc-simple-command okstatus command |
fb7933a3 KG |
308 | (or file (buffer-file-name)) args)) |
309 | ad-do-it))) | |
310 | ||
311 | ||
312 | ;; `vc-workfile-unchanged-p' | |
313 | ;; This function does not deal well with remote files, so we do the | |
314 | ;; same as for `vc-do-command'. | |
315 | ||
316 | ;; `vc-workfile-unchanged-p' checks the modification time, we cannot | |
317 | ;; do that for remote files, so here's a version which relies on diff. | |
318 | ;; CCC: this one probably works for Emacs 21, too. | |
319 | (defun tramp-vc-workfile-unchanged-p | |
320 | (filename &optional want-differences-if-changed) | |
321 | (if (fboundp 'vc-backend-diff) | |
322 | ;; Old VC. Call `vc-backend-diff'. | |
323 | (let ((status (funcall (symbol-function 'vc-backend-diff) | |
324 | filename nil nil | |
325 | (not want-differences-if-changed)))) | |
326 | (zerop status)) | |
327 | ;; New VC. Call `vc-default-workfile-unchanged-p'. | |
328 | (vc-default-workfile-unchanged-p (vc-backend file) filename))) | |
329 | ||
330 | (defadvice vc-workfile-unchanged-p | |
331 | (around tramp-advice-vc-workfile-unchanged-p | |
332 | (filename &optional want-differences-if-changed) | |
333 | activate) | |
334 | "Invoke tramp-vc-workfile-unchanged-p for tramp files." | |
335 | (if (and (stringp filename) | |
336 | (tramp-tramp-file-p filename) | |
337 | (not | |
338 | (let ((v (tramp-dissect-file-name filename))) | |
90f8dc03 KG |
339 | ;; The following check is probably to test whether |
340 | ;; file-attributes returns correct last modification | |
341 | ;; times. This check needs to be changed. | |
fb7933a3 KG |
342 | (tramp-get-remote-perl (tramp-file-name-multi-method v) |
343 | (tramp-file-name-method v) | |
344 | (tramp-file-name-user v) | |
345 | (tramp-file-name-host v))))) | |
346 | (setq ad-return-value | |
347 | (tramp-vc-workfile-unchanged-p filename want-differences-if-changed)) | |
348 | ad-do-it)) | |
349 | ||
350 | ||
351 | ;; Redefine a function from vc.el -- allow tramp files. | |
352 | ;; `save-match-data' seems not to be required -- it isn't in | |
353 | ;; the original version, either. | |
354 | ;; CCC: this might need some work -- how does the Emacs 21 version | |
355 | ;; work, anyway? Does it work over ange-ftp? Hm. | |
356 | (if (not (fboundp 'vc-backend-checkout)) | |
357 | () ;; our replacement won't work and is unnecessary anyway | |
358 | (defun vc-checkout (filename &optional writable rev) | |
359 | "Retrieve a copy of the latest version of the given file." | |
360 | ;; If ftp is on this system and the name matches the ange-ftp format | |
361 | ;; for a remote file, the user is trying something that won't work. | |
362 | (funcall (symbol-function 'vc-backend-checkout) filename writable rev) | |
363 | (vc-resynch-buffer filename t t)) | |
364 | ) | |
365 | ||
366 | ||
367 | ;; Do we need to advise the vc-user-login-name function anyway? | |
7432277c | 368 | ;; This will return the correct login name for the owner of a |
fb7933a3 KG |
369 | ;; file. It does not deal with the default remote user name... |
370 | ;; | |
7432277c | 371 | ;; That is, when vc calls (vc-user-login-name), we return the |
fb7933a3 | 372 | ;; local login name, something that may be different to the remote |
7432277c | 373 | ;; default. |
fb7933a3 KG |
374 | ;; |
375 | ;; The remote VC operations will occur as the user that we logged | |
376 | ;; in with however - not always the same as the local user. | |
377 | ;; | |
7432277c | 378 | ;; In the end, I did advise the function. This is because, well, |
fb7933a3 KG |
379 | ;; the thing didn't work right otherwise ;) |
380 | ;; | |
381 | ;; Daniel Pittman <daniel@danann.net> | |
382 | ||
383 | (defun tramp-handle-vc-user-login-name (&optional uid) | |
384 | "Return the default user name on the remote machine. | |
385 | Whenever VC calls this function, `file' is bound to the file name | |
386 | in question. If no uid is provided or the uid is equal to the uid | |
387 | owning the file, then we return the user name given in the file name. | |
388 | ||
389 | This should only be called when `file' is bound to the | |
390 | filename we are thinking about..." | |
391 | ;; Pacify byte-compiler; this symbol is bound in the calling | |
392 | ;; function. CCC: Maybe it would be better to move the | |
393 | ;; boundness-checking into this function? | |
394 | (let ((file (symbol-value 'file))) | |
395 | (if (and uid (/= uid (nth 2 (file-attributes file)))) | |
396 | (error "tramp-handle-vc-user-login-name cannot map a uid to a name") | |
397 | (let* ((v (tramp-dissect-file-name (tramp-handle-expand-file-name file))) | |
398 | (u (tramp-file-name-user v))) | |
399 | (cond ((stringp u) u) | |
400 | ((vectorp u) (elt u (1- (length u)))) | |
401 | ((null u) (user-login-name)) | |
402 | (t (error "tramp-handle-vc-user-login-name cannot cope!"))))))) | |
403 | ||
404 | ||
405 | (defadvice vc-user-login-name | |
406 | (around tramp-vc-user-login-name activate) | |
407 | "Support for files on remote machines accessed by TRAMP." | |
408 | ;; We rely on the fact that `file' is bound when this is called. | |
409 | ;; This appears to be the case everywhere in vc.el and vc-hooks.el | |
410 | ;; as of Emacs 20.5. | |
411 | ;; | |
412 | ;; CCC TODO there should be a real solution! Talk to Andre Spiegel | |
413 | ;; about this. | |
414 | (let ((file (when (boundp 'file) | |
415 | (symbol-value 'file)))) ;pacify byte-compiler | |
416 | (or (and (stringp file) | |
417 | (tramp-tramp-file-p file) ; tramp file | |
418 | (setq ad-return-value | |
419 | (save-match-data | |
420 | (tramp-handle-vc-user-login-name uid)))) ; get the owner name | |
421 | ad-do-it))) ; else call the original | |
422 | ||
7432277c | 423 | |
fb7933a3 KG |
424 | ;; Determine the name of the user owning a file. |
425 | (defun tramp-file-owner (filename) | |
426 | "Return who owns FILE (user name, as a string)." | |
7432277c | 427 | (let ((v (tramp-dissect-file-name |
fb7933a3 KG |
428 | (tramp-handle-expand-file-name filename)))) |
429 | (if (not (tramp-handle-file-exists-p filename)) | |
430 | nil ; file cannot be opened | |
431 | ;; file exists, find out stuff | |
432 | (save-excursion | |
433 | (tramp-send-command | |
434 | (tramp-file-name-multi-method v) (tramp-file-name-method v) | |
435 | (tramp-file-name-user v) (tramp-file-name-host v) | |
436 | (format "%s -Lld %s" | |
437 | (tramp-get-ls-command (tramp-file-name-multi-method v) | |
438 | (tramp-file-name-method v) | |
439 | (tramp-file-name-user v) | |
440 | (tramp-file-name-host v)) | |
7432277c | 441 | (tramp-shell-quote-argument (tramp-file-name-localname v)))) |
fb7933a3 KG |
442 | (tramp-wait-for-output) |
443 | ;; parse `ls -l' output ... | |
444 | ;; ... file mode flags | |
445 | (read (current-buffer)) | |
446 | ;; ... number links | |
447 | (read (current-buffer)) | |
448 | ;; ... uid (as a string) | |
449 | (symbol-name (read (current-buffer))))))) | |
450 | ||
451 | ;; Wire ourselves into the VC infrastructure... | |
452 | ;; This function does not exist any more in Emacs-21's VC | |
453 | ;; CCC: it appears that no substitute is needed for Emacs 21. | |
454 | (defadvice vc-file-owner | |
455 | (around tramp-vc-file-owner activate) | |
456 | "Support for files on remote machines accessed by TRAMP." | |
457 | (let ((filename (ad-get-arg 0))) | |
458 | (or (and (tramp-file-name-p filename) ; tramp file | |
459 | (setq ad-return-value | |
460 | (save-match-data | |
461 | (tramp-file-owner filename)))) ; get the owner name | |
462 | ad-do-it))) ; else call the original | |
463 | ||
464 | ||
465 | ;; We need to make the version control software backend version | |
466 | ;; information local to the current buffer. This is because each TRAMP | |
467 | ;; buffer can (theoretically) have a different VC version and I am | |
468 | ;; *way* too lazy to try and push the correct value into each new | |
469 | ;; buffer. | |
470 | ;; | |
471 | ;; Remote VC costs will just have to be paid, at least for the moment. | |
472 | ;; Well, at least, they will right until I feel guilty about doing a | |
473 | ;; botch job here and fix it. :/ | |
474 | ;; | |
475 | ;; Daniel Pittman <daniel@danann.net> | |
476 | ;; CCC: this is probably still needed for Emacs 21. | |
477 | (defun tramp-vc-setup-for-remote () | |
478 | "Make the backend release variables buffer local. | |
479 | This makes remote VC work correctly at the cost of some processing time." | |
480 | (when (and (buffer-file-name) | |
481 | (tramp-tramp-file-p (buffer-file-name))) | |
482 | (make-local-variable 'vc-rcs-release) | |
483 | (setq vc-rcs-release nil))) | |
484 | (add-hook 'find-file-hooks 'tramp-vc-setup-for-remote t) | |
485 | ||
486 | ;; No need to load this again if anyone asks. | |
487 | (provide 'tramp-vc) | |
488 | ||
ab5796a9 | 489 | ;;; arch-tag: 27cc42ce-da19-468d-ad5c-a2690558db60 |
fb7933a3 | 490 | ;;; tramp-vc.el ends here |