| 1 | ;;; vc-hooks.el --- resident support for version-control |
| 2 | |
| 3 | ;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Eric S. Raymond <esr@snark.thyrsus.com> |
| 6 | ;; Maintainer: Andre Spiegel <spiegel@inf.fu-berlin.de> |
| 7 | |
| 8 | ;; $Id: vc-hooks.el,v 1.113 1998/11/11 18:47:32 kwzh Exp $ |
| 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 2, or (at your option) |
| 15 | ;; 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; see the file COPYING. If not, write to the |
| 24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 25 | ;; Boston, MA 02111-1307, USA. |
| 26 | |
| 27 | ;;; Commentary: |
| 28 | |
| 29 | ;; This is the always-loaded portion of VC. |
| 30 | ;; It takes care VC-related activities that are done when you visit a file, |
| 31 | ;; so that vc.el itself is loaded only when you use a VC command. |
| 32 | ;; See the commentary of vc.el. |
| 33 | |
| 34 | ;;; Code: |
| 35 | |
| 36 | ;; Customization Variables (the rest is in vc.el) |
| 37 | |
| 38 | (defcustom vc-default-back-end nil |
| 39 | "*Back-end actually used by this interface; may be SCCS or RCS. |
| 40 | The value is only computed when needed to avoid an expensive search." |
| 41 | :type '(choice (const nil) (const RCS) (const SCCS)) |
| 42 | :group 'vc) |
| 43 | |
| 44 | (defcustom vc-handle-cvs t |
| 45 | "*If non-nil, use VC for files managed with CVS. |
| 46 | If it is nil, don't use VC for those files." |
| 47 | :type 'boolean |
| 48 | :group 'vc) |
| 49 | |
| 50 | (defcustom vc-rcsdiff-knows-brief nil |
| 51 | "*Indicates whether rcsdiff understands the --brief option. |
| 52 | The value is either `yes', `no', or nil. If it is nil, VC tries |
| 53 | to use --brief and sets this variable to remember whether it worked." |
| 54 | :type '(choice (const nil) (const yes) (const no)) |
| 55 | :group 'vc) |
| 56 | |
| 57 | (defcustom vc-path |
| 58 | (if (file-directory-p "/usr/sccs") |
| 59 | '("/usr/sccs") |
| 60 | nil) |
| 61 | "*List of extra directories to search for version control commands." |
| 62 | :type '(repeat directory) |
| 63 | :group 'vc) |
| 64 | |
| 65 | (defcustom vc-master-templates |
| 66 | '(("%sRCS/%s,v" . RCS) ("%s%s,v" . RCS) ("%sRCS/%s" . RCS) |
| 67 | ("%sSCCS/s.%s" . SCCS) ("%ss.%s". SCCS) |
| 68 | vc-find-cvs-master |
| 69 | vc-search-sccs-project-dir) |
| 70 | "*Where to look for version-control master files. |
| 71 | The first pair corresponding to a given back end is used as a template |
| 72 | when creating new masters. |
| 73 | Setting this variable to nil turns off use of VC entirely." |
| 74 | :type '(repeat sexp) |
| 75 | :group 'vc) |
| 76 | |
| 77 | (defcustom vc-make-backup-files nil |
| 78 | "*If non-nil, backups of registered files are made as with other files. |
| 79 | If nil (the default), files covered by version control don't get backups." |
| 80 | :type 'boolean |
| 81 | :group 'vc) |
| 82 | |
| 83 | (defcustom vc-follow-symlinks 'ask |
| 84 | "*Indicates what to do if you visit a symbolic link to a file |
| 85 | that is under version control. Editing such a file through the |
| 86 | link bypasses the version control system, which is dangerous and |
| 87 | probably not what you want. |
| 88 | If this variable is t, VC follows the link and visits the real file, |
| 89 | telling you about it in the echo area. If it is `ask', VC asks for |
| 90 | confirmation whether it should follow the link. If nil, the link is |
| 91 | visited and a warning displayed." |
| 92 | :type '(choice (const ask) (const nil) (const t)) |
| 93 | :group 'vc) |
| 94 | |
| 95 | (defcustom vc-display-status t |
| 96 | "*If non-nil, display revision number and lock status in modeline. |
| 97 | Otherwise, not displayed." |
| 98 | :type 'boolean |
| 99 | :group 'vc) |
| 100 | |
| 101 | |
| 102 | (defcustom vc-consult-headers t |
| 103 | "*If non-nil, identify work files by searching for version headers." |
| 104 | :type 'boolean |
| 105 | :group 'vc) |
| 106 | |
| 107 | (defcustom vc-keep-workfiles t |
| 108 | "*If non-nil, don't delete working files after registering changes. |
| 109 | If the back-end is CVS, workfiles are always kept, regardless of the |
| 110 | value of this flag." |
| 111 | :type 'boolean |
| 112 | :group 'vc) |
| 113 | |
| 114 | (defcustom vc-mistrust-permissions nil |
| 115 | "*If non-nil, don't assume that permissions and ownership track |
| 116 | version-control status. If nil, do rely on the permissions. |
| 117 | See also variable `vc-consult-headers'." |
| 118 | :type 'boolean |
| 119 | :group 'vc) |
| 120 | |
| 121 | (defcustom vc-ignore-vc-files nil |
| 122 | "*If non-nil don't look for version control information when finding files. |
| 123 | |
| 124 | It may be useful to set this if (say) you edit files in a directory |
| 125 | containing corresponding RCS files but don't have RCS available; |
| 126 | similarly for other version control systems." |
| 127 | :type 'boolean |
| 128 | :group 'vc |
| 129 | :version "20.3") |
| 130 | |
| 131 | (defun vc-mistrust-permissions (file) |
| 132 | ;; Access function to the above. |
| 133 | (or (eq vc-mistrust-permissions 't) |
| 134 | (and vc-mistrust-permissions |
| 135 | (funcall vc-mistrust-permissions |
| 136 | (vc-backend-subdirectory-name file))))) |
| 137 | |
| 138 | ;; Tell Emacs about this new kind of minor mode |
| 139 | (if (not (assoc 'vc-mode minor-mode-alist)) |
| 140 | (setq minor-mode-alist (cons '(vc-mode vc-mode) |
| 141 | minor-mode-alist))) |
| 142 | |
| 143 | (make-variable-buffer-local 'vc-mode) |
| 144 | (put 'vc-mode 'permanent-local t) |
| 145 | |
| 146 | ;; We need a notion of per-file properties because the version |
| 147 | ;; control state of a file is expensive to derive --- we compute |
| 148 | ;; them when the file is initially found, keep them up to date |
| 149 | ;; during any subsequent VC operations, and forget them when |
| 150 | ;; the buffer is killed. |
| 151 | |
| 152 | (defmacro vc-error-occurred (&rest body) |
| 153 | (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t))) |
| 154 | |
| 155 | (defvar vc-file-prop-obarray [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] |
| 156 | "Obarray for per-file properties.") |
| 157 | |
| 158 | (defvar vc-buffer-backend t) |
| 159 | (make-variable-buffer-local 'vc-buffer-backend) |
| 160 | |
| 161 | (defun vc-file-setprop (file property value) |
| 162 | ;; set per-file property |
| 163 | (put (intern file vc-file-prop-obarray) property value)) |
| 164 | |
| 165 | (defun vc-file-getprop (file property) |
| 166 | ;; get per-file property |
| 167 | (get (intern file vc-file-prop-obarray) property)) |
| 168 | |
| 169 | (defun vc-file-clearprops (file) |
| 170 | ;; clear all properties of a given file |
| 171 | (setplist (intern file vc-file-prop-obarray) nil)) |
| 172 | |
| 173 | ;;; Functions that determine property values, by examining the |
| 174 | ;;; working file, the master file, or log program output |
| 175 | |
| 176 | (defun vc-match-substring (bn) |
| 177 | (buffer-substring (match-beginning bn) (match-end bn))) |
| 178 | |
| 179 | (defun vc-lock-file (file) |
| 180 | ;; Generate lock file name corresponding to FILE |
| 181 | (let ((master (vc-name file))) |
| 182 | (and |
| 183 | master |
| 184 | (string-match "\\(.*/\\)s\\.\\(.*\\)" master) |
| 185 | (concat |
| 186 | (substring master (match-beginning 1) (match-end 1)) |
| 187 | "p." |
| 188 | (substring master (match-beginning 2) (match-end 2)))))) |
| 189 | |
| 190 | (defun vc-parse-buffer (patterns &optional file properties) |
| 191 | ;; Use PATTERNS to parse information out of the current buffer. |
| 192 | ;; Each element of PATTERNS is a list of 2 to 3 elements. The first element |
| 193 | ;; is the pattern to be matched, and the second (an integer) is the |
| 194 | ;; number of the subexpression that should be returned. If there's |
| 195 | ;; a third element (also the number of a subexpression), that |
| 196 | ;; subexpression is assumed to be a date field and we want the most |
| 197 | ;; recent entry matching the template. |
| 198 | ;; If FILE and PROPERTIES are given, the latter must be a list of |
| 199 | ;; properties of the same length as PATTERNS; each property is assigned |
| 200 | ;; the corresponding value. |
| 201 | (mapcar (function (lambda (p) |
| 202 | (goto-char (point-min)) |
| 203 | (cond |
| 204 | ((eq (length p) 2) ;; search for first entry |
| 205 | (let ((value nil)) |
| 206 | (if (re-search-forward (car p) nil t) |
| 207 | (setq value (vc-match-substring (elt p 1)))) |
| 208 | (if file |
| 209 | (progn (vc-file-setprop file (car properties) value) |
| 210 | (setq properties (cdr properties)))) |
| 211 | value)) |
| 212 | ((eq (length p) 3) ;; search for latest entry |
| 213 | (let ((latest-date "") (latest-val)) |
| 214 | (while (re-search-forward (car p) nil t) |
| 215 | (let ((date (vc-match-substring (elt p 2)))) |
| 216 | (if (string< latest-date date) |
| 217 | (progn |
| 218 | (setq latest-date date) |
| 219 | (setq latest-val |
| 220 | (vc-match-substring (elt p 1))))))) |
| 221 | (if file |
| 222 | (progn (vc-file-setprop file (car properties) latest-val) |
| 223 | (setq properties (cdr properties)))) |
| 224 | latest-val))))) |
| 225 | patterns) |
| 226 | ) |
| 227 | |
| 228 | (defun vc-insert-file (file &optional limit blocksize) |
| 229 | ;; Insert the contents of FILE into the current buffer. |
| 230 | ;; Optional argument LIMIT is a regexp. If present, |
| 231 | ;; the file is inserted in chunks of size BLOCKSIZE |
| 232 | ;; (default 8 kByte), until the first occurrence of |
| 233 | ;; LIMIT is found. The function returns nil if FILE |
| 234 | ;; doesn't exist. |
| 235 | (erase-buffer) |
| 236 | (cond ((file-exists-p file) |
| 237 | (cond (limit |
| 238 | (if (not blocksize) (setq blocksize 8192)) |
| 239 | (let (found s) |
| 240 | (while (not found) |
| 241 | (setq s (buffer-size)) |
| 242 | (goto-char (1+ s)) |
| 243 | (setq found |
| 244 | (or (zerop (car (cdr |
| 245 | (insert-file-contents file nil s |
| 246 | (+ s blocksize))))) |
| 247 | (progn (beginning-of-line) |
| 248 | (re-search-forward limit nil t))))))) |
| 249 | (t (insert-file-contents file))) |
| 250 | (set-buffer-modified-p nil) |
| 251 | (auto-save-mode nil) |
| 252 | t) |
| 253 | (t nil))) |
| 254 | |
| 255 | (defun vc-parse-locks (file locks) |
| 256 | ;; Parse RCS or SCCS locks. |
| 257 | ;; The result is a list of the form ((VERSION USER) (VERSION USER) ...), |
| 258 | ;; which is returned and stored into the property `vc-master-locks'. |
| 259 | (if (not locks) |
| 260 | (vc-file-setprop file 'vc-master-locks 'none) |
| 261 | (let ((found t) (index 0) master-locks version user) |
| 262 | (cond ((eq (vc-backend file) 'SCCS) |
| 263 | (while (string-match "^\\([0-9.]+\\) [0-9.]+ \\([^ ]+\\) .*\n?" |
| 264 | locks index) |
| 265 | (setq version (substring locks |
| 266 | (match-beginning 1) (match-end 1))) |
| 267 | (setq user (substring locks |
| 268 | (match-beginning 2) (match-end 2))) |
| 269 | (setq master-locks (append master-locks |
| 270 | (list (cons version user)))) |
| 271 | (setq index (match-end 0)))) |
| 272 | ((eq (vc-backend file) 'RCS) |
| 273 | (while (string-match "[ \t\n]*\\([^:]+\\):\\([0-9.]+\\)" |
| 274 | locks index) |
| 275 | (setq version (substring locks |
| 276 | (match-beginning 2) (match-end 2))) |
| 277 | (setq user (substring locks |
| 278 | (match-beginning 1) (match-end 1))) |
| 279 | (setq master-locks (append master-locks |
| 280 | (list (cons version user)))) |
| 281 | (setq index (match-end 0))) |
| 282 | (if (string-match ";[ \t\n]+strict;" locks index) |
| 283 | (vc-file-setprop file 'vc-checkout-model 'manual) |
| 284 | (vc-file-setprop file 'vc-checkout-model 'implicit)))) |
| 285 | (vc-file-setprop file 'vc-master-locks (or master-locks 'none))))) |
| 286 | |
| 287 | (defun vc-simple-command (okstatus command file &rest args) |
| 288 | ;; Simple version of vc-do-command, for use in vc-hooks only. |
| 289 | ;; Don't switch to the *vc-info* buffer before running the |
| 290 | ;; command, because that would change its default directory |
| 291 | (save-excursion (set-buffer (get-buffer-create "*vc-info*")) |
| 292 | (erase-buffer)) |
| 293 | (let ((exec-path (append vc-path exec-path)) exec-status |
| 294 | ;; Add vc-path to PATH for the execution of this command. |
| 295 | (process-environment |
| 296 | (cons (concat "PATH=" (getenv "PATH") |
| 297 | path-separator |
| 298 | (mapconcat 'identity vc-path path-separator)) |
| 299 | process-environment))) |
| 300 | (setq exec-status |
| 301 | (apply 'call-process command nil "*vc-info*" nil |
| 302 | (append args (list file)))) |
| 303 | (cond ((> exec-status okstatus) |
| 304 | (switch-to-buffer (get-file-buffer file)) |
| 305 | (shrink-window-if-larger-than-buffer |
| 306 | (display-buffer "*vc-info*")) |
| 307 | (error "Couldn't find version control information"))) |
| 308 | exec-status)) |
| 309 | |
| 310 | (defun vc-parse-cvs-status (&optional full) |
| 311 | ;; Parse output of "cvs status" command in the current buffer and |
| 312 | ;; set file properties accordingly. Unless FULL is t, parse only |
| 313 | ;; essential information. |
| 314 | (let (file status) |
| 315 | (goto-char (point-min)) |
| 316 | (if (re-search-forward "^File: " nil t) |
| 317 | (cond |
| 318 | ((looking-at "no file") nil) |
| 319 | ((re-search-forward "\\=\\([^ \t]+\\)" nil t) |
| 320 | (setq file (concat default-directory (match-string 1))) |
| 321 | (vc-file-setprop file 'vc-backend 'CVS) |
| 322 | (if (not (re-search-forward "\\=[ \t]+Status: \\(.*\\)" nil t)) |
| 323 | (setq status "Unknown") |
| 324 | (setq status (match-string 1))) |
| 325 | (if (and full |
| 326 | (re-search-forward |
| 327 | "\\(RCS Version\\|RCS Revision\\|Repository revision\\):[\t ]+\\([0-9.]+\\)" |
| 328 | nil t)) |
| 329 | (vc-file-setprop file 'vc-latest-version (match-string 2))) |
| 330 | (cond |
| 331 | ((string-match "Up-to-date" status) |
| 332 | (vc-file-setprop file 'vc-cvs-status 'up-to-date) |
| 333 | (vc-file-setprop file 'vc-checkout-time |
| 334 | (nth 5 (file-attributes file)))) |
| 335 | ((vc-file-setprop file 'vc-cvs-status |
| 336 | (cond |
| 337 | ((string-match "Locally Modified" status) 'locally-modified) |
| 338 | ((string-match "Needs Merge" status) 'needs-merge) |
| 339 | ((string-match "Needs \\(Checkout\\|Patch\\)" status) |
| 340 | 'needs-checkout) |
| 341 | ((string-match "Unresolved Conflict" status) |
| 342 | 'unresolved-conflict) |
| 343 | ((string-match "File had conflicts on merge" status) |
| 344 | 'unresolved-conflict) |
| 345 | ((string-match "Locally Added" status) 'locally-added) |
| 346 | ((string-match "New file!" status) 'locally-added) |
| 347 | (t 'unknown)))))))))) |
| 348 | |
| 349 | (defun vc-fetch-master-properties (file) |
| 350 | ;; Fetch those properties of FILE that are stored in the master file. |
| 351 | ;; For an RCS file, we don't get vc-latest-version vc-your-latest-version |
| 352 | ;; here because that is slow. |
| 353 | ;; That gets done if/when the functions vc-latest-version |
| 354 | ;; and vc-your-latest-version get called. |
| 355 | (save-excursion |
| 356 | (cond |
| 357 | ((eq (vc-backend file) 'SCCS) |
| 358 | (set-buffer (get-buffer-create "*vc-info*")) |
| 359 | (if (vc-insert-file (vc-lock-file file)) |
| 360 | (vc-parse-locks file (buffer-string)) |
| 361 | (vc-file-setprop file 'vc-master-locks 'none)) |
| 362 | (vc-insert-file (vc-name file) "^\001e") |
| 363 | (vc-parse-buffer |
| 364 | (list '("^\001d D \\([^ ]+\\)" 1) |
| 365 | (list (concat "^\001d D \\([^ ]+\\) .* " |
| 366 | (regexp-quote (vc-user-login-name)) " ") 1)) |
| 367 | file |
| 368 | '(vc-latest-version vc-your-latest-version))) |
| 369 | |
| 370 | ((eq (vc-backend file) 'RCS) |
| 371 | (set-buffer (get-buffer-create "*vc-info*")) |
| 372 | (vc-insert-file (vc-name file) "^[0-9]") |
| 373 | (vc-parse-buffer |
| 374 | (list '("^head[ \t\n]+\\([^;]+\\);" 1) |
| 375 | '("^branch[ \t\n]+\\([^;]+\\);" 1) |
| 376 | '("^locks[ \t\n]*\\([^;]*;\\([ \t\n]*strict;\\)?\\)" 1)) |
| 377 | file |
| 378 | '(vc-head-version |
| 379 | vc-default-branch |
| 380 | vc-master-locks)) |
| 381 | ;; determine vc-master-workfile-version: it is either the head |
| 382 | ;; of the trunk, the head of the default branch, or the |
| 383 | ;; "default branch" itself, if that is a full revision number. |
| 384 | (let ((default-branch (vc-file-getprop file 'vc-default-branch))) |
| 385 | (cond |
| 386 | ;; no default branch |
| 387 | ((or (not default-branch) (string= "" default-branch)) |
| 388 | (vc-file-setprop file 'vc-master-workfile-version |
| 389 | (vc-file-getprop file 'vc-head-version))) |
| 390 | ;; default branch is actually a revision |
| 391 | ((string-match "^[0-9]+\\.[0-9]+\\(\\.[0-9]+\\.[0-9]+\\)*$" |
| 392 | default-branch) |
| 393 | (vc-file-setprop file 'vc-master-workfile-version default-branch)) |
| 394 | ;; else, search for the head of the default branch |
| 395 | (t (vc-insert-file (vc-name file) "^desc") |
| 396 | (vc-parse-buffer (list (list |
| 397 | (concat "^\\(" |
| 398 | (regexp-quote default-branch) |
| 399 | "\\.[0-9]+\\)\ndate[ \t]+\\([0-9.]+\\);") 1 2)) |
| 400 | file '(vc-master-workfile-version))))) |
| 401 | ;; translate the locks |
| 402 | (vc-parse-locks file (vc-file-getprop file 'vc-master-locks))) |
| 403 | |
| 404 | ((eq (vc-backend file) 'CVS) |
| 405 | (save-excursion |
| 406 | ;; Call "cvs status" in the right directory, passing only the |
| 407 | ;; nondirectory part of the file name -- otherwise CVS might |
| 408 | ;; silently give a wrong result. |
| 409 | (let ((default-directory (file-name-directory file))) |
| 410 | (vc-simple-command 0 "cvs" (file-name-nondirectory file) "status")) |
| 411 | (set-buffer (get-buffer "*vc-info*")) |
| 412 | (vc-parse-cvs-status t)))) |
| 413 | (if (get-buffer "*vc-info*") |
| 414 | (kill-buffer (get-buffer "*vc-info*"))))) |
| 415 | |
| 416 | ;;; Functions that determine property values, by examining the |
| 417 | ;;; working file, the master file, or log program output |
| 418 | |
| 419 | (defun vc-consult-rcs-headers (file) |
| 420 | ;; Search for RCS headers in FILE, and set properties |
| 421 | ;; accordingly. This function can be disabled by setting |
| 422 | ;; vc-consult-headers to nil. |
| 423 | ;; Returns: nil if no headers were found |
| 424 | ;; (or if the feature is disabled, |
| 425 | ;; or if there is currently no buffer |
| 426 | ;; visiting FILE) |
| 427 | ;; 'rev if a workfile revision was found |
| 428 | ;; 'rev-and-lock if revision and lock info was found |
| 429 | (cond |
| 430 | ((or (not vc-consult-headers) |
| 431 | (not (get-file-buffer file))) nil) |
| 432 | ((let (status version locking-user) |
| 433 | (save-excursion |
| 434 | (set-buffer (get-file-buffer file)) |
| 435 | (goto-char (point-min)) |
| 436 | (cond |
| 437 | ;; search for $Id or $Header |
| 438 | ;; ------------------------- |
| 439 | ;; The `\ 's below avoid an RCS 5.7 bug when checking in this file. |
| 440 | ((or (and (search-forward "$Id\ : " nil t) |
| 441 | (looking-at "[^ ]+ \\([0-9.]+\\) ")) |
| 442 | (and (progn (goto-char (point-min)) |
| 443 | (search-forward "$Header\ : " nil t)) |
| 444 | (looking-at "[^ ]+ \\([0-9.]+\\) "))) |
| 445 | (goto-char (match-end 0)) |
| 446 | ;; if found, store the revision number ... |
| 447 | (setq version (buffer-substring-no-properties (match-beginning 1) |
| 448 | (match-end 1))) |
| 449 | ;; ... and check for the locking state |
| 450 | (cond |
| 451 | ((looking-at |
| 452 | (concat "[0-9]+[/-][01][0-9][/-][0-3][0-9] " ; date |
| 453 | "[0-2][0-9]:[0-5][0-9]+:[0-6][0-9]+\\([+-][0-9:]+\\)? " ; time |
| 454 | "[^ ]+ [^ ]+ ")) ; author & state |
| 455 | (goto-char (match-end 0)) ; [0-6] in regexp handles leap seconds |
| 456 | (cond |
| 457 | ;; unlocked revision |
| 458 | ((looking-at "\\$") |
| 459 | (setq locking-user 'none) |
| 460 | (setq status 'rev-and-lock)) |
| 461 | ;; revision is locked by some user |
| 462 | ((looking-at "\\([^ ]+\\) \\$") |
| 463 | (setq locking-user |
| 464 | (buffer-substring-no-properties (match-beginning 1) |
| 465 | (match-end 1))) |
| 466 | (setq status 'rev-and-lock)) |
| 467 | ;; everything else: false |
| 468 | (nil))) |
| 469 | ;; unexpected information in |
| 470 | ;; keyword string --> quit |
| 471 | (nil))) |
| 472 | ;; search for $Revision |
| 473 | ;; -------------------- |
| 474 | ((re-search-forward (concat "\\$" |
| 475 | "Revision: \\([0-9.]+\\) \\$") |
| 476 | nil t) |
| 477 | ;; if found, store the revision number ... |
| 478 | (setq version (buffer-substring-no-properties (match-beginning 1) |
| 479 | (match-end 1))) |
| 480 | ;; and see if there's any lock information |
| 481 | (goto-char (point-min)) |
| 482 | (if (re-search-forward (concat "\\$" "Locker:") nil t) |
| 483 | (cond ((looking-at " \\([^ ]+\\) \\$") |
| 484 | (setq locking-user (buffer-substring-no-properties |
| 485 | (match-beginning 1) |
| 486 | (match-end 1))) |
| 487 | (setq status 'rev-and-lock)) |
| 488 | ((looking-at " *\\$") |
| 489 | (setq locking-user 'none) |
| 490 | (setq status 'rev-and-lock)) |
| 491 | (t |
| 492 | (setq locking-user 'none) |
| 493 | (setq status 'rev-and-lock))) |
| 494 | (setq status 'rev))) |
| 495 | ;; else: nothing found |
| 496 | ;; ------------------- |
| 497 | (t nil))) |
| 498 | (if status (vc-file-setprop file 'vc-workfile-version version)) |
| 499 | (and (eq status 'rev-and-lock) |
| 500 | (eq (vc-backend file) 'RCS) |
| 501 | (vc-file-setprop file 'vc-locking-user locking-user) |
| 502 | ;; If the file has headers, we don't want to query the master file, |
| 503 | ;; because that would eliminate all the performance gain the headers |
| 504 | ;; brought us. We therefore use a heuristic for the checkout model |
| 505 | ;; now: If we trust the file permissions, and the file is not |
| 506 | ;; locked, then if the file is read-only the checkout model is |
| 507 | ;; `manual', otherwise `implicit'. |
| 508 | (not (vc-mistrust-permissions file)) |
| 509 | (not (vc-locking-user file)) |
| 510 | (if (string-match ".r-..-..-." (nth 8 (file-attributes file))) |
| 511 | (vc-file-setprop file 'vc-checkout-model 'manual) |
| 512 | (vc-file-setprop file 'vc-checkout-model 'implicit))) |
| 513 | status)))) |
| 514 | |
| 515 | ;;; Access functions to file properties |
| 516 | ;;; (Properties should be _set_ using vc-file-setprop, but |
| 517 | ;;; _retrieved_ only through these functions, which decide |
| 518 | ;;; if the property is already known or not. A property should |
| 519 | ;;; only be retrieved by vc-file-getprop if there is no |
| 520 | ;;; access function.) |
| 521 | |
| 522 | ;;; properties indicating the backend |
| 523 | ;;; being used for FILE |
| 524 | |
| 525 | (defun vc-backend-subdirectory-name (&optional file) |
| 526 | ;; Where the master and lock files for the current directory are kept |
| 527 | (symbol-name |
| 528 | (or |
| 529 | (and file (vc-backend file)) |
| 530 | vc-default-back-end |
| 531 | (setq vc-default-back-end (if (vc-find-binary "rcs") 'RCS 'SCCS))))) |
| 532 | |
| 533 | (defun vc-name (file) |
| 534 | "Return the master name of a file, nil if it is not registered. |
| 535 | For CVS, the full name of CVS/Entries is returned." |
| 536 | (or (vc-file-getprop file 'vc-name) |
| 537 | ;; Use the caching mechanism of vc-backend, below. |
| 538 | (if (vc-backend file) |
| 539 | (vc-file-getprop file 'vc-name)))) |
| 540 | |
| 541 | (defun vc-backend (file) |
| 542 | "Return the version-control type of a file, nil if it is not registered." |
| 543 | ;; Note that internally, Emacs remembers unregistered |
| 544 | ;; files by setting the property to `none'. |
| 545 | (if file |
| 546 | (let ((property (vc-file-getprop file 'vc-backend)) |
| 547 | (name-and-type)) |
| 548 | (cond ((eq property 'none) nil) |
| 549 | (property) |
| 550 | (t (setq name-and-type (vc-registered file)) |
| 551 | (if name-and-type |
| 552 | (progn |
| 553 | (vc-file-setprop file 'vc-name (car name-and-type)) |
| 554 | (vc-file-setprop file 'vc-backend (cdr name-and-type))) |
| 555 | (vc-file-setprop file 'vc-backend 'none) |
| 556 | nil)))))) |
| 557 | |
| 558 | (defun vc-checkout-model (file) |
| 559 | ;; Return `manual' if the user has to type C-x C-q to check out FILE. |
| 560 | ;; Return `implicit' if the file can be modified without locking it first. |
| 561 | (or |
| 562 | (vc-file-getprop file 'vc-checkout-model) |
| 563 | (cond |
| 564 | ((eq (vc-backend file) 'SCCS) |
| 565 | (vc-file-setprop file 'vc-checkout-model 'manual)) |
| 566 | ((eq (vc-backend file) 'RCS) |
| 567 | (vc-consult-rcs-headers file) |
| 568 | (or (vc-file-getprop file 'vc-checkout-model) |
| 569 | (progn (vc-fetch-master-properties file) |
| 570 | (vc-file-getprop file 'vc-checkout-model)))) |
| 571 | ((eq (vc-backend file) 'CVS) |
| 572 | (vc-file-setprop file 'vc-checkout-model |
| 573 | (cond |
| 574 | ((getenv "CVSREAD") 'manual) |
| 575 | ;; If the file is not writeable, this is probably because the |
| 576 | ;; file is being "watched" by other developers. Use "manual" |
| 577 | ;; checkout in this case. (If vc-mistrust-permissions was t, |
| 578 | ;; we actually shouldn't trust this, but there is no other way |
| 579 | ;; to learn this from CVS at the moment (version 1.9).) |
| 580 | ((string-match "r-..-..-." (nth 8 (file-attributes file))) |
| 581 | 'manual) |
| 582 | (t 'implicit))))))) |
| 583 | |
| 584 | ;;; properties indicating the locking state |
| 585 | |
| 586 | (defun vc-cvs-status (file) |
| 587 | ;; Return the cvs status of FILE |
| 588 | ;; (Status field in output of "cvs status") |
| 589 | (cond ((vc-file-getprop file 'vc-cvs-status)) |
| 590 | (t (vc-fetch-master-properties file) |
| 591 | (vc-file-getprop file 'vc-cvs-status)))) |
| 592 | |
| 593 | (defun vc-master-locks (file) |
| 594 | ;; Return the lock entries in the master of FILE. |
| 595 | ;; Return 'none if there are no such entries, and a list |
| 596 | ;; of the form ((VERSION USER) (VERSION USER) ...) otherwise. |
| 597 | (cond ((vc-file-getprop file 'vc-master-locks)) |
| 598 | (t (vc-fetch-master-properties file) |
| 599 | (vc-file-getprop file 'vc-master-locks)))) |
| 600 | |
| 601 | (defun vc-master-locking-user (file) |
| 602 | ;; Return the master file's idea of who is locking |
| 603 | ;; the current workfile version of FILE. |
| 604 | ;; Return 'none if it is not locked. |
| 605 | (let ((master-locks (vc-master-locks file)) lock) |
| 606 | (if (eq master-locks 'none) 'none |
| 607 | ;; search for a lock on the current workfile version |
| 608 | (setq lock (assoc (vc-workfile-version file) master-locks)) |
| 609 | (cond (lock (cdr lock)) |
| 610 | ('none))))) |
| 611 | |
| 612 | (defun vc-lock-from-permissions (file) |
| 613 | ;; If the permissions can be trusted for this file, determine the |
| 614 | ;; locking state from them. Returns (user-login-name), `none', or nil. |
| 615 | ;; This implementation assumes that any file which is under version |
| 616 | ;; control and has -rw-r--r-- is locked by its owner. This is true |
| 617 | ;; for both RCS and SCCS, which keep unlocked files at -r--r--r--. |
| 618 | ;; We have to be careful not to exclude files with execute bits on; |
| 619 | ;; scripts can be under version control too. Also, we must ignore the |
| 620 | ;; group-read and other-read bits, since paranoid users turn them off. |
| 621 | ;; This hack wins because calls to the somewhat expensive |
| 622 | ;; `vc-fetch-master-properties' function only have to be made if |
| 623 | ;; (a) the file is locked by someone other than the current user, |
| 624 | ;; or (b) some untoward manipulation behind vc's back has changed |
| 625 | ;; the owner or the `group' or `other' write bits. |
| 626 | (let ((attributes (file-attributes file))) |
| 627 | (if (not (vc-mistrust-permissions file)) |
| 628 | (cond ((string-match ".r-..-..-." (nth 8 attributes)) |
| 629 | (vc-file-setprop file 'vc-locking-user 'none)) |
| 630 | ((and (= (nth 2 attributes) (user-uid)) |
| 631 | (string-match ".rw..-..-." (nth 8 attributes))) |
| 632 | (vc-file-setprop file 'vc-locking-user (vc-user-login-name))) |
| 633 | (nil))))) |
| 634 | |
| 635 | (defun vc-user-login-name (&optional uid) |
| 636 | ;; Return the name under which the user is logged in, as a string. |
| 637 | ;; (With optional argument UID, return the name of that user.) |
| 638 | ;; This function does the same as `user-login-name', but unlike |
| 639 | ;; that, it never returns nil. If a UID cannot be resolved, that |
| 640 | ;; UID is returned as a string. |
| 641 | (or (user-login-name uid) |
| 642 | (and uid (number-to-string uid)) |
| 643 | (number-to-string (user-uid)))) |
| 644 | |
| 645 | (defun vc-file-owner (file) |
| 646 | ;; Return who owns FILE (user name, as a string). |
| 647 | (vc-user-login-name (nth 2 (file-attributes file)))) |
| 648 | |
| 649 | (defun vc-rcs-lock-from-diff (file) |
| 650 | ;; Diff the file against the master version. If differences are found, |
| 651 | ;; mark the file locked. This is only used for RCS with non-strict |
| 652 | ;; locking. (If "rcsdiff" doesn't understand --brief, we do a double-take |
| 653 | ;; and remember the fact for the future.) |
| 654 | (let* ((version (concat "-r" (vc-workfile-version file))) |
| 655 | (status (if (eq vc-rcsdiff-knows-brief 'no) |
| 656 | (vc-simple-command 1 "rcsdiff" file version) |
| 657 | (vc-simple-command 2 "rcsdiff" file "--brief" version)))) |
| 658 | (if (eq status 2) |
| 659 | (if (not vc-rcsdiff-knows-brief) |
| 660 | (setq vc-rcsdiff-knows-brief 'no |
| 661 | status (vc-simple-command 1 "rcsdiff" file version)) |
| 662 | (error "rcsdiff failed.")) |
| 663 | (if (not vc-rcsdiff-knows-brief) (setq vc-rcsdiff-knows-brief 'yes))) |
| 664 | (if (zerop status) |
| 665 | (vc-file-setprop file 'vc-locking-user 'none) |
| 666 | (vc-file-setprop file 'vc-locking-user (vc-file-owner file))))) |
| 667 | |
| 668 | (defun vc-locking-user (file) |
| 669 | ;; Return the name of the person currently holding a lock on FILE. |
| 670 | ;; Return nil if there is no such person. |
| 671 | ;; Under CVS, a file is considered locked if it has been modified since |
| 672 | ;; it was checked out. |
| 673 | ;; The property is cached. It is only looked up if it is currently nil. |
| 674 | ;; Note that, for a file that is not locked, the actual property value |
| 675 | ;; is `none', to distinguish it from an unknown locking state. That value |
| 676 | ;; is converted to nil by this function, and returned to the caller. |
| 677 | (let ((locking-user (vc-file-getprop file 'vc-locking-user))) |
| 678 | (if locking-user |
| 679 | ;; if we already know the property, return it |
| 680 | (if (eq locking-user 'none) nil locking-user) |
| 681 | |
| 682 | ;; otherwise, infer the property... |
| 683 | (cond |
| 684 | ((eq (vc-backend file) 'CVS) |
| 685 | (or (and (eq (vc-checkout-model file) 'manual) |
| 686 | (vc-lock-from-permissions file)) |
| 687 | (and (equal (vc-file-getprop file 'vc-checkout-time) |
| 688 | (nth 5 (file-attributes file))) |
| 689 | (vc-file-setprop file 'vc-locking-user 'none)) |
| 690 | (vc-file-setprop file 'vc-locking-user (vc-file-owner file)))) |
| 691 | |
| 692 | ((eq (vc-backend file) 'RCS) |
| 693 | (let (p-lock) |
| 694 | |
| 695 | ;; Check for RCS headers first |
| 696 | (or (eq (vc-consult-rcs-headers file) 'rev-and-lock) |
| 697 | |
| 698 | ;; If there are no headers, try to learn it |
| 699 | ;; from the permissions. |
| 700 | (and (setq p-lock (vc-lock-from-permissions file)) |
| 701 | (if (eq p-lock 'none) |
| 702 | |
| 703 | ;; If the permissions say "not locked", we know |
| 704 | ;; that the checkout model must be `manual'. |
| 705 | (vc-file-setprop file 'vc-checkout-model 'manual) |
| 706 | |
| 707 | ;; If the permissions say "locked", we can only trust |
| 708 | ;; this *if* the checkout model is `manual'. |
| 709 | (eq (vc-checkout-model file) 'manual))) |
| 710 | |
| 711 | ;; Otherwise, use lock information from the master file. |
| 712 | (vc-file-setprop file 'vc-locking-user |
| 713 | (vc-master-locking-user file))) |
| 714 | |
| 715 | ;; Finally, if the file is not explicitly locked |
| 716 | ;; it might still be locked implicitly. |
| 717 | (and (eq (vc-file-getprop file 'vc-locking-user) 'none) |
| 718 | (eq (vc-checkout-model file) 'implicit) |
| 719 | (vc-rcs-lock-from-diff file)))) |
| 720 | |
| 721 | ((eq (vc-backend file) 'SCCS) |
| 722 | (or (vc-lock-from-permissions file) |
| 723 | (vc-file-setprop file 'vc-locking-user |
| 724 | (vc-master-locking-user file))))) |
| 725 | |
| 726 | ;; convert a possible 'none value |
| 727 | (setq locking-user (vc-file-getprop file 'vc-locking-user)) |
| 728 | (if (eq locking-user 'none) nil locking-user)))) |
| 729 | |
| 730 | ;;; properties to store current and recent version numbers |
| 731 | |
| 732 | (defun vc-latest-version (file) |
| 733 | ;; Return version level of the latest version of FILE |
| 734 | (cond ((vc-file-getprop file 'vc-latest-version)) |
| 735 | (t (vc-fetch-properties file) |
| 736 | (vc-file-getprop file 'vc-latest-version)))) |
| 737 | |
| 738 | (defun vc-your-latest-version (file) |
| 739 | ;; Return version level of the latest version of FILE checked in by you |
| 740 | (cond ((vc-file-getprop file 'vc-your-latest-version)) |
| 741 | (t (vc-fetch-properties file) |
| 742 | (vc-file-getprop file 'vc-your-latest-version)))) |
| 743 | |
| 744 | (defun vc-master-workfile-version (file) |
| 745 | ;; Return the master file's idea of what is the current workfile version. |
| 746 | ;; This property is defined for RCS only. |
| 747 | (cond ((vc-file-getprop file 'vc-master-workfile-version)) |
| 748 | (t (vc-fetch-master-properties file) |
| 749 | (vc-file-getprop file 'vc-master-workfile-version)))) |
| 750 | |
| 751 | (defun vc-fetch-properties (file) |
| 752 | ;; Fetch vc-latest-version and vc-your-latest-version |
| 753 | ;; if that wasn't already done. |
| 754 | (cond |
| 755 | ((eq (vc-backend file) 'RCS) |
| 756 | (save-excursion |
| 757 | (set-buffer (get-buffer-create "*vc-info*")) |
| 758 | (vc-insert-file (vc-name file) "^desc") |
| 759 | (vc-parse-buffer |
| 760 | (list '("^\\([0-9]+\\.[0-9.]+\\)\ndate[ \t]+\\([0-9.]+\\);" 1 2) |
| 761 | (list (concat "^\\([0-9]+\\.[0-9.]+\\)\n" |
| 762 | "date[ \t]+\\([0-9.]+\\);[ \t]+" |
| 763 | "author[ \t]+" |
| 764 | (regexp-quote (vc-user-login-name)) ";") 1 2)) |
| 765 | file |
| 766 | '(vc-latest-version vc-your-latest-version)) |
| 767 | (if (get-buffer "*vc-info*") |
| 768 | (kill-buffer (get-buffer "*vc-info*"))))) |
| 769 | (t (vc-fetch-master-properties file)) |
| 770 | )) |
| 771 | |
| 772 | (defun vc-workfile-version (file) |
| 773 | ;; Return version level of the current workfile FILE |
| 774 | ;; This is attempted by first looking at the RCS keywords. |
| 775 | ;; If there are no keywords in the working file, |
| 776 | ;; vc-master-workfile-version is taken. |
| 777 | ;; Note that this property is cached, that is, it is only |
| 778 | ;; looked up if it is nil. |
| 779 | ;; For SCCS, this property is equivalent to vc-latest-version. |
| 780 | (cond ((vc-file-getprop file 'vc-workfile-version)) |
| 781 | ((eq (vc-backend file) 'SCCS) (vc-latest-version file)) |
| 782 | ((eq (vc-backend file) 'RCS) |
| 783 | (if (vc-consult-rcs-headers file) |
| 784 | (vc-file-getprop file 'vc-workfile-version) |
| 785 | (let ((rev (cond ((vc-master-workfile-version file)) |
| 786 | ((vc-latest-version file))))) |
| 787 | (vc-file-setprop file 'vc-workfile-version rev) |
| 788 | rev))) |
| 789 | ((eq (vc-backend file) 'CVS) |
| 790 | (if (vc-consult-rcs-headers file) ;; CVS |
| 791 | (vc-file-getprop file 'vc-workfile-version) |
| 792 | (catch 'found |
| 793 | (vc-find-cvs-master (file-name-directory file) |
| 794 | (file-name-nondirectory file))) |
| 795 | (vc-file-getprop file 'vc-workfile-version))))) |
| 796 | |
| 797 | ;;; actual version-control code starts here |
| 798 | |
| 799 | (defun vc-registered (file) |
| 800 | (let (handler handlers) |
| 801 | (if (boundp 'file-name-handler-alist) |
| 802 | (setq handler (find-file-name-handler file 'vc-registered))) |
| 803 | (if handler |
| 804 | (funcall handler 'vc-registered file) |
| 805 | ;; Search for a master corresponding to the given file |
| 806 | (let ((dirname (or (file-name-directory file) "")) |
| 807 | (basename (file-name-nondirectory file))) |
| 808 | (catch 'found |
| 809 | (mapcar |
| 810 | (function (lambda (s) |
| 811 | (if (atom s) |
| 812 | (funcall s dirname basename) |
| 813 | (let ((trial (format (car s) dirname basename))) |
| 814 | (if (and (file-exists-p trial) |
| 815 | ;; Make sure the file we found with name |
| 816 | ;; TRIAL is not the source file itself. |
| 817 | ;; That can happen with RCS-style names |
| 818 | ;; if the file name is truncated |
| 819 | ;; (e.g. to 14 chars). See if either |
| 820 | ;; directory or attributes differ. |
| 821 | (or (not (string= dirname |
| 822 | (file-name-directory trial))) |
| 823 | (not (equal |
| 824 | (file-attributes file) |
| 825 | (file-attributes trial))))) |
| 826 | (throw 'found (cons trial (cdr s)))))))) |
| 827 | vc-master-templates) |
| 828 | nil))))) |
| 829 | |
| 830 | (defun vc-sccs-project-dir () |
| 831 | ;; Return the full pathname of the SCCS PROJECTDIR, if it exists, |
| 832 | ;; otherwise nil. The PROJECTDIR is indicated by the environment |
| 833 | ;; variable of the same name. If its value starts with a slash, |
| 834 | ;; it must be an absolute path name that points to the |
| 835 | ;; directory where SCCS history files reside. If it does not |
| 836 | ;; begin with a slash, it is taken as the name of a user, |
| 837 | ;; and history files reside in an "src" or "source" subdirectory |
| 838 | ;; of that user's home directory. |
| 839 | (let ((project-dir (getenv "PROJECTDIR"))) |
| 840 | (and project-dir |
| 841 | (if (eq (elt project-dir 0) ?/) |
| 842 | (if (file-exists-p (concat project-dir "/SCCS")) |
| 843 | (concat project-dir "/SCCS/") |
| 844 | (if (file-exists-p project-dir) |
| 845 | project-dir)) |
| 846 | (setq project-dir (expand-file-name (concat "~" project-dir))) |
| 847 | (let (trial) |
| 848 | (setq trial (concat project-dir "/src/SCCS")) |
| 849 | (if (file-exists-p trial) |
| 850 | (concat trial "/") |
| 851 | (setq trial (concat project-dir "/src")) |
| 852 | (if (file-exists-p trial) |
| 853 | (concat trial "/") |
| 854 | (setq trial (concat project-dir "/source/SCCS")) |
| 855 | (if (file-exists-p trial) |
| 856 | (concat trial "/") |
| 857 | (setq trial (concat project-dir "/source/")) |
| 858 | (if (file-exists-p trial) |
| 859 | (concat trial "/")))))))))) |
| 860 | |
| 861 | (defun vc-search-sccs-project-dir (dirname basename) |
| 862 | ;; Check if there is a master file for BASENAME in the |
| 863 | ;; SCCS project directory. If yes, throw `found' as |
| 864 | ;; expected by vc-registered. If not, return nil. |
| 865 | (let* ((project-dir (vc-sccs-project-dir)) |
| 866 | (master-file (and project-dir (concat project-dir "s." basename)))) |
| 867 | (and master-file |
| 868 | (file-exists-p master-file) |
| 869 | (throw 'found (cons master-file 'SCCS))))) |
| 870 | |
| 871 | (defun vc-find-cvs-master (dirname basename) |
| 872 | ;; Check if DIRNAME/BASENAME is handled by CVS. |
| 873 | ;; If it is, do a (throw 'found (cons MASTER-FILE 'CVS)). |
| 874 | ;; Note: This function throws the name of CVS/Entries |
| 875 | ;; NOT that of the RCS master file (because we wouldn't be able |
| 876 | ;; to access it under remote CVS). |
| 877 | ;; The function returns nil if DIRNAME/BASENAME is not handled by CVS. |
| 878 | (if (and vc-handle-cvs |
| 879 | (file-directory-p (concat dirname "CVS/")) |
| 880 | (file-readable-p (concat dirname "CVS/Entries"))) |
| 881 | (let ((file (concat dirname basename)) |
| 882 | buffer) |
| 883 | (unwind-protect |
| 884 | (save-excursion |
| 885 | (setq buffer (set-buffer (get-buffer-create "*vc-info*"))) |
| 886 | (vc-insert-file (concat dirname "CVS/Entries")) |
| 887 | (goto-char (point-min)) |
| 888 | ;; make sure that the file name is searched |
| 889 | ;; case-sensitively - case-fold-search is a buffer-local |
| 890 | ;; variable, so setting it here won't affect any other buffers |
| 891 | (setq case-fold-search nil) |
| 892 | (cond |
| 893 | ;; entry for a "locally added" file (not yet committed) |
| 894 | ((re-search-forward |
| 895 | (concat "^/" (regexp-quote basename) "/0/") nil t) |
| 896 | (vc-file-setprop file 'vc-checkout-time 0) |
| 897 | (vc-file-setprop file 'vc-workfile-version "0") |
| 898 | (throw 'found (cons (concat dirname "CVS/Entries") 'CVS))) |
| 899 | ;; normal entry |
| 900 | ((re-search-forward |
| 901 | (concat "^/" (regexp-quote basename) |
| 902 | ;; revision |
| 903 | "/\\([^/]*\\)" |
| 904 | ;; timestamp |
| 905 | "/[A-Z][a-z][a-z]" ;; week day (irrelevant) |
| 906 | " \\([A-Z][a-z][a-z]\\)" ;; month name |
| 907 | " *\\([0-9]*\\)" ;; day of month |
| 908 | " \\([0-9]*\\):\\([0-9]*\\):\\([0-9]*\\)" ;; hms |
| 909 | " \\([0-9]*\\)" ;; year |
| 910 | ;; optional conflict field |
| 911 | "\\(+[^/]*\\)?/") |
| 912 | nil t) |
| 913 | ;; We found it. Store away version number now that we |
| 914 | ;; are anyhow so close to finding it. |
| 915 | (vc-file-setprop file |
| 916 | 'vc-workfile-version |
| 917 | (match-string 1)) |
| 918 | ;; If the file hasn't been modified since checkout, |
| 919 | ;; store the checkout-time. |
| 920 | (let ((mtime (nth 5 (file-attributes file))) |
| 921 | (second (string-to-number (match-string 6))) |
| 922 | (minute (string-to-number (match-string 5))) |
| 923 | (hour (string-to-number (match-string 4))) |
| 924 | (day (string-to-number (match-string 3))) |
| 925 | (year (string-to-number (match-string 7)))) |
| 926 | (if (equal mtime |
| 927 | (encode-time |
| 928 | second minute hour day |
| 929 | (/ (string-match |
| 930 | (match-string 2) |
| 931 | "xxxJanFebMarAprMayJunJulAugSepOctNovDec") |
| 932 | 3) |
| 933 | year 0)) |
| 934 | (vc-file-setprop file 'vc-checkout-time mtime) |
| 935 | (vc-file-setprop file 'vc-checkout-time 0))) |
| 936 | (throw 'found (cons (concat dirname "CVS/Entries") 'CVS))) |
| 937 | ;; entry with arbitrary text as timestamp |
| 938 | ;; (this means we should consider it modified) |
| 939 | ((re-search-forward |
| 940 | (concat "^/" (regexp-quote basename) |
| 941 | ;; revision |
| 942 | "/\\([^/]*\\)" |
| 943 | ;; timestamp (arbitrary text) |
| 944 | "/[^/]*" |
| 945 | ;; optional conflict field |
| 946 | "\\(+[^/]*\\)?/") |
| 947 | nil t) |
| 948 | ;; We found it. Store away version number now that we |
| 949 | ;; are anyhow so close to finding it. |
| 950 | (vc-file-setprop file 'vc-workfile-version (match-string 1)) |
| 951 | (vc-file-setprop file 'vc-checkout-time 0) |
| 952 | (throw 'found (cons (concat dirname "CVS/Entries") 'CVS))) |
| 953 | (t nil))) |
| 954 | (kill-buffer buffer))))) |
| 955 | |
| 956 | (defun vc-buffer-backend () |
| 957 | "Return the version-control type of the visited file, or nil if none." |
| 958 | (if (eq vc-buffer-backend t) |
| 959 | (setq vc-buffer-backend (vc-backend (buffer-file-name))) |
| 960 | vc-buffer-backend)) |
| 961 | |
| 962 | (defun vc-toggle-read-only (&optional verbose) |
| 963 | "Change read-only status of current buffer, perhaps via version control. |
| 964 | If the buffer is visiting a file registered with version control, |
| 965 | then check the file in or out. Otherwise, just change the read-only flag |
| 966 | of the buffer. |
| 967 | With prefix argument, ask for version number to check in or check out. |
| 968 | Check-out of a specified version number does not lock the file; |
| 969 | to do that, use this command a second time with no argument." |
| 970 | (interactive "P") |
| 971 | (if (or (and (boundp 'vc-dired-mode) vc-dired-mode) |
| 972 | ;; use boundp because vc.el might not be loaded |
| 973 | (vc-backend (buffer-file-name))) |
| 974 | (vc-next-action verbose) |
| 975 | (toggle-read-only))) |
| 976 | (define-key global-map "\C-x\C-q" 'vc-toggle-read-only) |
| 977 | |
| 978 | (defun vc-after-save () |
| 979 | ;; Function to be called by basic-save-buffer (in files.el). |
| 980 | ;; If the file in the current buffer is under version control, |
| 981 | ;; not locked, and the checkout model for it is `implicit', |
| 982 | ;; mark it "locked" and redisplay the mode line. |
| 983 | (let ((file (buffer-file-name))) |
| 984 | (and (vc-backend file) |
| 985 | (or (and (equal (vc-file-getprop file 'vc-checkout-time) |
| 986 | (nth 5 (file-attributes file))) |
| 987 | ;; File has been saved in the same second in which |
| 988 | ;; it was checked out. Clear the checkout-time |
| 989 | ;; to avoid confusion. |
| 990 | (vc-file-setprop file 'vc-checkout-time nil)) |
| 991 | t) |
| 992 | (not (vc-locking-user file)) |
| 993 | (eq (vc-checkout-model file) 'implicit) |
| 994 | (vc-file-setprop file 'vc-locking-user (vc-user-login-name)) |
| 995 | (or (and (eq (vc-backend file) 'CVS) |
| 996 | (vc-file-setprop file 'vc-cvs-status nil)) |
| 997 | t) |
| 998 | (vc-mode-line file)))) |
| 999 | |
| 1000 | (defun vc-mode-line (file &optional label) |
| 1001 | "Set `vc-mode' to display type of version control for FILE. |
| 1002 | The value is set in the current buffer, which should be the buffer |
| 1003 | visiting FILE. Second optional arg LABEL is put in place of version |
| 1004 | control system name." |
| 1005 | (interactive (list buffer-file-name nil)) |
| 1006 | (let ((vc-type (vc-backend file))) |
| 1007 | (setq vc-mode |
| 1008 | (and vc-type |
| 1009 | (concat " " (or label (symbol-name vc-type)) |
| 1010 | (and vc-display-status (vc-status file))))) |
| 1011 | ;; If the file is locked by some other user, make |
| 1012 | ;; the buffer read-only. Like this, even root |
| 1013 | ;; cannot modify a file that someone else has locked. |
| 1014 | (and vc-type |
| 1015 | (equal file (buffer-file-name)) |
| 1016 | (vc-locking-user file) |
| 1017 | (not (string= (vc-user-login-name) (vc-locking-user file))) |
| 1018 | (setq buffer-read-only t)) |
| 1019 | ;; If the user is root, and the file is not owner-writable, |
| 1020 | ;; then pretend that we can't write it |
| 1021 | ;; even though we can (because root can write anything). |
| 1022 | ;; This way, even root cannot modify a file that isn't locked. |
| 1023 | (and vc-type |
| 1024 | (equal file (buffer-file-name)) |
| 1025 | (not buffer-read-only) |
| 1026 | (zerop (user-real-uid)) |
| 1027 | (zerop (logand (file-modes (buffer-file-name)) 128)) |
| 1028 | (setq buffer-read-only t)) |
| 1029 | (force-mode-line-update) |
| 1030 | ;;(set-buffer-modified-p (buffer-modified-p)) ;;use this if Emacs 18 |
| 1031 | vc-type)) |
| 1032 | |
| 1033 | (defun vc-status (file) |
| 1034 | ;; Return string for placement in modeline by `vc-mode-line'. |
| 1035 | ;; Format: |
| 1036 | ;; |
| 1037 | ;; "-REV" if the revision is not locked |
| 1038 | ;; ":REV" if the revision is locked by the user |
| 1039 | ;; ":LOCKER:REV" if the revision is locked by somebody else |
| 1040 | ;; " @@" for a CVS file that is added, but not yet committed |
| 1041 | ;; |
| 1042 | ;; In the CVS case, a "locked" working file is a |
| 1043 | ;; working file that is modified with respect to the master. |
| 1044 | ;; The file is "locked" from the moment when the user saves |
| 1045 | ;; the modified buffer. |
| 1046 | ;; |
| 1047 | ;; This function assumes that the file is registered. |
| 1048 | |
| 1049 | (let ((locker (vc-locking-user file)) |
| 1050 | (rev (vc-workfile-version file))) |
| 1051 | (cond ((string= "0" rev) |
| 1052 | " @@") |
| 1053 | ((not locker) |
| 1054 | (concat "-" rev)) |
| 1055 | ((string= locker (vc-user-login-name)) |
| 1056 | (concat ":" rev)) |
| 1057 | (t |
| 1058 | (concat ":" locker ":" rev))))) |
| 1059 | |
| 1060 | (defun vc-follow-link () |
| 1061 | ;; If the current buffer visits a symbolic link, this function makes it |
| 1062 | ;; visit the real file instead. If the real file is already visited in |
| 1063 | ;; another buffer, make that buffer current, and kill the buffer |
| 1064 | ;; that visits the link. |
| 1065 | (let* ((truename (abbreviate-file-name (file-chase-links buffer-file-name))) |
| 1066 | (true-buffer (find-buffer-visiting truename)) |
| 1067 | (this-buffer (current-buffer))) |
| 1068 | (if (eq true-buffer this-buffer) |
| 1069 | (progn |
| 1070 | (kill-buffer this-buffer) |
| 1071 | ;; In principle, we could do something like set-visited-file-name. |
| 1072 | ;; However, it can't be exactly the same as set-visited-file-name. |
| 1073 | ;; I'm not going to work out the details right now. -- rms. |
| 1074 | (set-buffer (find-file-noselect truename))) |
| 1075 | (set-buffer true-buffer) |
| 1076 | (kill-buffer this-buffer)))) |
| 1077 | |
| 1078 | ;;; install a call to the above as a find-file hook |
| 1079 | (defun vc-find-file-hook () |
| 1080 | ;; Recompute whether file is version controlled, |
| 1081 | ;; if user has killed the buffer and revisited. |
| 1082 | (cond |
| 1083 | ((and (not vc-ignore-vc-files) buffer-file-name) |
| 1084 | (vc-file-clearprops buffer-file-name) |
| 1085 | (cond |
| 1086 | ((vc-backend buffer-file-name) |
| 1087 | (vc-mode-line buffer-file-name) |
| 1088 | (cond ((not vc-make-backup-files) |
| 1089 | ;; Use this variable, not make-backup-files, |
| 1090 | ;; because this is for things that depend on the file name. |
| 1091 | (make-local-variable 'backup-inhibited) |
| 1092 | (setq backup-inhibited t)))) |
| 1093 | ((let* ((link (file-symlink-p buffer-file-name)) |
| 1094 | (link-type (and link (vc-backend (file-chase-links link))))) |
| 1095 | (if link-type |
| 1096 | (cond ((eq vc-follow-symlinks nil) |
| 1097 | (message |
| 1098 | "Warning: symbolic link to %s-controlled source file" link-type)) |
| 1099 | ((or (not (eq vc-follow-symlinks 'ask)) |
| 1100 | ;; If we already visited this file by following |
| 1101 | ;; the link, don't ask again if we try to visit |
| 1102 | ;; it again. GUD does that, and repeated questions |
| 1103 | ;; are painful. |
| 1104 | (get-file-buffer |
| 1105 | (abbreviate-file-name (file-chase-links buffer-file-name)))) |
| 1106 | |
| 1107 | (vc-follow-link) |
| 1108 | (message "Followed link to %s" buffer-file-name) |
| 1109 | (vc-find-file-hook)) |
| 1110 | (t |
| 1111 | (if (yes-or-no-p (format |
| 1112 | "Symbolic link to %s-controlled source file; follow link? " link-type)) |
| 1113 | (progn (vc-follow-link) |
| 1114 | (message "Followed link to %s" buffer-file-name) |
| 1115 | (vc-find-file-hook)) |
| 1116 | (message |
| 1117 | "Warning: editing through the link bypasses version control") |
| 1118 | )))))))))) |
| 1119 | |
| 1120 | (add-hook 'find-file-hooks 'vc-find-file-hook) |
| 1121 | |
| 1122 | ;;; more hooks, this time for file-not-found |
| 1123 | (defun vc-file-not-found-hook () |
| 1124 | "When file is not found, try to check it out from RCS or SCCS. |
| 1125 | Returns t if checkout was successful, nil otherwise." |
| 1126 | ;; When a file does not exist, ignore cached info about it |
| 1127 | ;; from a previous visit. |
| 1128 | (vc-file-clearprops buffer-file-name) |
| 1129 | (if (and (not vc-ignore-vc-files) |
| 1130 | (vc-backend buffer-file-name)) |
| 1131 | (save-excursion |
| 1132 | (require 'vc) |
| 1133 | (setq default-directory (file-name-directory (buffer-file-name))) |
| 1134 | (not (vc-error-occurred (vc-checkout buffer-file-name)))))) |
| 1135 | |
| 1136 | (add-hook 'find-file-not-found-hooks 'vc-file-not-found-hook) |
| 1137 | |
| 1138 | ;; Discard info about a file when we kill its buffer. |
| 1139 | (defun vc-kill-buffer-hook () |
| 1140 | (if (stringp (buffer-file-name)) |
| 1141 | (progn |
| 1142 | (vc-file-clearprops (buffer-file-name)) |
| 1143 | (kill-local-variable 'vc-buffer-backend)))) |
| 1144 | |
| 1145 | ;;;(add-hook 'kill-buffer-hook 'vc-kill-buffer-hook) |
| 1146 | |
| 1147 | ;;; Now arrange for bindings and autoloading of the main package. |
| 1148 | ;;; Bindings for this have to go in the global map, as we'll often |
| 1149 | ;;; want to call them from random buffers. |
| 1150 | |
| 1151 | (setq vc-prefix-map (lookup-key global-map "\C-xv")) |
| 1152 | (if (not (keymapp vc-prefix-map)) |
| 1153 | (progn |
| 1154 | (setq vc-prefix-map (make-sparse-keymap)) |
| 1155 | (define-key global-map "\C-xv" vc-prefix-map) |
| 1156 | (define-key vc-prefix-map "a" 'vc-update-change-log) |
| 1157 | (define-key vc-prefix-map "c" 'vc-cancel-version) |
| 1158 | (define-key vc-prefix-map "d" 'vc-directory) |
| 1159 | (define-key vc-prefix-map "g" 'vc-annotate) |
| 1160 | (define-key vc-prefix-map "h" 'vc-insert-headers) |
| 1161 | (define-key vc-prefix-map "i" 'vc-register) |
| 1162 | (define-key vc-prefix-map "l" 'vc-print-log) |
| 1163 | (define-key vc-prefix-map "m" 'vc-merge) |
| 1164 | (define-key vc-prefix-map "r" 'vc-retrieve-snapshot) |
| 1165 | (define-key vc-prefix-map "s" 'vc-create-snapshot) |
| 1166 | (define-key vc-prefix-map "u" 'vc-revert-buffer) |
| 1167 | (define-key vc-prefix-map "v" 'vc-next-action) |
| 1168 | (define-key vc-prefix-map "=" 'vc-diff) |
| 1169 | (define-key vc-prefix-map "~" 'vc-version-other-window))) |
| 1170 | |
| 1171 | (if (not (boundp 'vc-menu-map)) |
| 1172 | ;; Don't do the menu bindings if menu-bar.el wasn't loaded to defvar |
| 1173 | ;; vc-menu-map. |
| 1174 | () |
| 1175 | ;;(define-key vc-menu-map [show-files] |
| 1176 | ;; '("Show Files under VC" . (vc-directory t))) |
| 1177 | (define-key vc-menu-map [vc-retrieve-snapshot] |
| 1178 | '("Retrieve Snapshot" . vc-retrieve-snapshot)) |
| 1179 | (define-key vc-menu-map [vc-create-snapshot] |
| 1180 | '("Create Snapshot" . vc-create-snapshot)) |
| 1181 | (define-key vc-menu-map [vc-directory] '("VC Directory Listing" . vc-directory)) |
| 1182 | (define-key vc-menu-map [separator1] '("----")) |
| 1183 | (define-key vc-menu-map [vc-annotate] '("Annotate" . vc-annotate)) |
| 1184 | (define-key vc-menu-map [vc-rename-file] '("Rename File" . vc-rename-file)) |
| 1185 | (define-key vc-menu-map [vc-version-other-window] |
| 1186 | '("Show Other Version" . vc-version-other-window)) |
| 1187 | (define-key vc-menu-map [vc-diff] '("Compare with Last Version" . vc-diff)) |
| 1188 | (define-key vc-menu-map [vc-update-change-log] |
| 1189 | '("Update ChangeLog" . vc-update-change-log)) |
| 1190 | (define-key vc-menu-map [vc-print-log] '("Show History" . vc-print-log)) |
| 1191 | (define-key vc-menu-map [separator2] '("----")) |
| 1192 | (define-key vc-menu-map [undo] '("Undo Last Check-In" . vc-cancel-version)) |
| 1193 | (define-key vc-menu-map [vc-revert-buffer] |
| 1194 | '("Revert to Last Version" . vc-revert-buffer)) |
| 1195 | (define-key vc-menu-map [vc-insert-header] |
| 1196 | '("Insert Header" . vc-insert-headers)) |
| 1197 | (define-key vc-menu-map [vc-next-action] '("Check In/Out" . vc-next-action)) |
| 1198 | (define-key vc-menu-map [vc-register] '("Register" . vc-register))) |
| 1199 | |
| 1200 | ;;; These are not correct and it's not currently clear how doing it |
| 1201 | ;;; better (with more complicated expressions) might slow things down |
| 1202 | ;;; on older systems. |
| 1203 | |
| 1204 | ;;;(put 'vc-rename-file 'menu-enable 'vc-mode) |
| 1205 | ;;;(put 'vc-annotate 'menu-enable '(eq (vc-buffer-backend) 'CVS)) |
| 1206 | ;;;(put 'vc-version-other-window 'menu-enable 'vc-mode) |
| 1207 | ;;;(put 'vc-diff 'menu-enable 'vc-mode) |
| 1208 | ;;;(put 'vc-update-change-log 'menu-enable |
| 1209 | ;;; '(eq (vc-buffer-backend) 'RCS)) |
| 1210 | ;;;(put 'vc-print-log 'menu-enable 'vc-mode) |
| 1211 | ;;;(put 'vc-cancel-version 'menu-enable 'vc-mode) |
| 1212 | ;;;(put 'vc-revert-buffer 'menu-enable 'vc-mode) |
| 1213 | ;;;(put 'vc-insert-headers 'menu-enable 'vc-mode) |
| 1214 | ;;;(put 'vc-next-action 'menu-enable 'vc-mode) |
| 1215 | ;;;(put 'vc-register 'menu-enable '(and buffer-file-name (not vc-mode))) |
| 1216 | |
| 1217 | (provide 'vc-hooks) |
| 1218 | |
| 1219 | ;;; vc-hooks.el ends here |