;;; vc-hooks.el --- resident support for version-control
-;; Copyright (C) 1992,93,94,95,96,98,99,2000,2003
+;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003, 2004
;; Free Software Foundation, Inc.
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
-;; $Id: vc-hooks.el,v 1.151 2003/05/31 17:43:28 monnier Exp $
+;; $Id$
;; This file is part of GNU Emacs.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Customization Variables (the rest is in vc.el)
(defvar vc-ignore-vc-files nil)
-(make-obsolete-variable 'vc-ignore-vc-files 'vc-handled-backends)
+(make-obsolete-variable 'vc-ignore-vc-files
+ "set `vc-handled-backends' to nil to disable VC.")
+
(defvar vc-master-templates ())
-(make-obsolete-variable 'vc-master-templates 'vc-BACKEND-master-templates)
+(make-obsolete-variable 'vc-master-templates
+ "to define master templates for a given BACKEND, use
+vc-BACKEND-master-templates. To enable or disable VC for a given
+BACKEND, use `vc-handled-backends'.")
+
(defvar vc-header-alist ())
(make-obsolete-variable 'vc-header-alist 'vc-BACKEND-header)
-(defcustom vc-handled-backends '(RCS CVS SVN MCVS SCCS)
+(defvar vc-ignore-dir-regexp "\\`\\([\\/][\\/]\\|/net/\\|/afs/\\)\\'"
+ "Regexp matching directory names that are not under VC's control.
+The default regexp prevents fruitless and time-consuming attempts
+to determine the VC status in directories in which filenames are
+interpreted as hostnames.")
+
+(defcustom vc-handled-backends '(RCS CVS SVN SCCS Arch MCVS)
+ ;; Arch and MCVS come last because they are per-tree rather than per-dir.
"*List of version control backends for which VC will be used.
Entries in this list will be tried in order to determine whether a
file is under that sort of version control.
(funcall vc-mistrust-permissions
(vc-backend-subdirectory-name file)))))
+(defcustom vc-stay-local t
+ "*Non-nil means use local operations when possible for remote repositories.
+This avoids slow queries over the network and instead uses heuristics
+and past information to determine the current status of a file.
+
+The value can also be a regular expression or list of regular
+expressions to match against the host name of a repository; then VC
+only stays local for hosts that match it. Alternatively, the value
+can be a list of regular expressions where the first element is the
+symbol `except'; then VC always stays local except for hosts matched
+by these regular expressions."
+ :type '(choice (const :tag "Always stay local" t)
+ (const :tag "Don't stay local" nil)
+ (list :format "\nExamine hostname and %v" :tag "Examine hostname ..."
+ (set :format "%v" :inline t (const :format "%t" :tag "don't" except))
+ (regexp :format " stay local,\n%t: %v" :tag "if it matches")
+ (repeat :format "%v%i\n" :inline t (regexp :tag "or"))))
+ :version "22.1"
+ :group 'vc)
+
+(defun vc-stay-local-p (file)
+ "Return non-nil if VC should stay local when handling FILE.
+This uses the `repository-hostname' backend operation."
+ (let* ((backend (vc-backend file))
+ (sym (vc-make-backend-sym backend 'stay-local))
+ (stay-local (if (boundp sym) (symbol-value sym) t)))
+ (if (eq stay-local t) (setq stay-local vc-stay-local))
+ (if (symbolp stay-local) stay-local
+ (let ((dirname (if (file-directory-p file)
+ (directory-file-name file)
+ (file-name-directory file))))
+ (eq 'yes
+ (or (vc-file-getprop dirname 'vc-stay-local-p)
+ (vc-file-setprop
+ dirname 'vc-stay-local-p
+ (let ((hostname (vc-call-backend
+ backend 'repository-hostname dirname)))
+ (if (not hostname)
+ 'no
+ (let ((default t))
+ (if (eq (car-safe stay-local) 'except)
+ (setq default nil stay-local (cdr stay-local)))
+ (when (consp stay-local)
+ (setq stay-local
+ (mapconcat 'identity stay-local "\\|")))
+ (if (if (string-match stay-local hostname)
+ default (not default))
+ 'yes 'no)))))))))))
+
;;; This is handled specially now.
;; Tell Emacs about this new kind of minor mode
;; (add-to-list 'minor-mode-alist '(vc-mode vc-mode))
(defmacro vc-call (fun file &rest args)
;; BEWARE!! `file' is evaluated twice!!
`(vc-call-backend (vc-backend ,file) ',fun ,file ,@args))
-
\f
(defsubst vc-parse-buffer (pattern i)
"Find PATTERN in the current buffer and return its Ith submatch."
(set-buffer-modified-p nil)
t))
+(defun vc-find-root (file witness)
+ "Find the root of a checked out project.
+The function walks up the directory tree from FILE looking for WITNESS.
+If WITNESS if not found, return nil, otherwise return the root."
+ (let ((root nil))
+ (while (not (or root
+ (equal file (setq file (file-name-directory file)))
+ (null file)
+ (string-match vc-ignore-dir-regexp file)))
+ (if (file-exists-p (expand-file-name witness file))
+ (setq root file)
+ (setq file (directory-file-name file))))
+ root))
+
;; Access functions to file properties
;; (Properties should be _set_ using vc-file-setprop, but
;; _retrieved_ only through these functions, which decide
file was previously registered under a certain backend, then that
backend is tried first."
(let (handler)
- (if (boundp 'file-name-handler-alist)
- (setq handler (find-file-name-handler file 'vc-registered)))
- (if handler
- ;; handler should set vc-backend and return t if registered
- (funcall handler 'vc-registered file)
+ (cond
+ ((string-match vc-ignore-dir-regexp (file-name-directory file)) nil)
+ ((and (boundp 'file-name-handler-alist)
+ (setq handler (find-file-name-handler file 'vc-registered)))
+ ;; handler should set vc-backend and return t if registered
+ (funcall handler 'vc-registered file))
+ (t
;; There is no file name handler.
;; Try vc-BACKEND-registered for each handled BACKEND.
(catch 'found
(cons backend vc-handled-backends))))
;; File is not registered.
(vc-file-setprop file 'vc-backend 'none)
- nil))))
+ nil)))))
(defun vc-backend (file)
"Return the version control type of FILE, nil if it is not registered."
(vc-file-setprop file 'vc-state
(vc-call state-heuristic file)))))
+(defun vc-recompute-state (file)
+ "Recompute the version control state of FILE, and return it.
+This calls the possibly expensive function vc-BACKEND-state,
+rather than the heuristic."
+ (vc-file-setprop file 'vc-state (vc-call state file)))
+
(defsubst vc-up-to-date-p (file)
"Convenience function that checks whether `vc-state' of FILE is `up-to-date'."
(eq (vc-state file) 'up-to-date))
"Return non-nil if FILE has not changed since the last checkout."
(let ((checkout-time (vc-file-getprop file 'vc-checkout-time))
(lastmod (nth 5 (file-attributes file))))
- (if checkout-time
+ (if (and checkout-time
+ ;; Tramp and Ange-FTP return this when they don't know the time.
+ (not (equal lastmod '(0 0))))
(equal checkout-time lastmod)
(let ((unchanged (vc-call workfile-unchanged-p file)))
(vc-file-setprop file 'vc-checkout-time (if unchanged lastmod 0))
(defun vc-default-workfile-unchanged-p (backend file)
"Check if FILE is unchanged by diffing against the master version.
Return non-nil if FILE is unchanged."
- ;; If rev1 is nil, `diff' uses the current workfile version.
- (zerop (vc-call diff file)))
+ (zerop (condition-case err
+ ;; If the implementation supports it, let the output
+ ;; go to *vc*, not *vc-diff*, since this is an internal call.
+ (vc-call diff file nil nil "*vc*")
+ (wrong-number-of-arguments
+ ;; If this error came from the above call to vc-BACKEND-diff,
+ ;; try again without the optional buffer argument (for
+ ;; backward compatibility). Otherwise, resignal.
+ (if (or (not (eq (cadr err)
+ (indirect-function
+ (vc-find-backend-function (vc-backend file)
+ 'diff))))
+ (not (eq (caddr err) 4)))
+ (signal (car err) (cdr err))
+ (vc-call diff file))))))
(defun vc-workfile-version (file)
"Return the version level of the current workfile FILE.
(and (consp template)
(eq (cdr template) backend)
(car template)))
- vc-master-templates))
+ (with-no-warnings
+ vc-master-templates)))
(symbol-value sym))))
(let ((result (vc-check-master-templates file (symbol-value sym))))
(if (stringp result)
"Make a backup copy of FILE, which is assumed in sync with the repository.
Before doing that, check if there are any old backups and get rid of them."
(unless (and (fboundp 'msdos-long-file-names)
- (not (msdos-long-file-names)))
+ (not (with-no-warnings (msdos-long-file-names))))
(vc-delete-automatic-version-backups file)
- (copy-file file (vc-version-backup-file-name file)
- nil 'keep-date)))
+ (condition-case nil
+ (copy-file file (vc-version-backup-file-name file)
+ nil 'keep-date)
+ ;; It's ok if it doesn't work (e.g. directory not writable),
+ ;; since this is just for efficiency.
+ (file-error
+ (message
+ (concat "Warning: Cannot make version backup; "
+ "diff/revert therefore not local"))))))
(defun vc-before-save ()
"Function to be called by `basic-save-buffer' (in files.el)."
(set-buffer true-buffer)
(kill-buffer this-buffer))))
+(defun vc-default-find-file-hook (backend)
+ nil)
+
(defun vc-find-file-hook ()
"Function for `find-file-hook' activating VC mode if appropriate."
;; Recompute whether file is version controlled,
(unless vc-make-backup-files
;; Use this variable, not make-backup-files,
;; because this is for things that depend on the file name.
- (set (make-local-variable 'backup-inhibited) t)))
- ((let* ((link (file-symlink-p buffer-file-name))
- (link-type (and link (vc-backend (file-chase-links link)))))
+ (set (make-local-variable 'backup-inhibited) t))
+ ;; Let the backend setup any buffer-local things he needs.
+ (vc-call-backend (vc-backend buffer-file-name) 'find-file-hook))
+ ((let ((link-type (and (file-symlink-p buffer-file-name)
+ (vc-backend (file-chase-links buffer-file-name)))))
(cond ((not link-type) nil) ;Nothing to do.
((eq vc-follow-symlinks nil)
(message
(defun vc-file-not-found-hook ()
"When file is not found, try to check it out from version control.
Returns t if checkout was successful, nil otherwise.
-Used in `find-file-not-found-hook'."
+Used in `find-file-not-found-functions'."
;; When a file does not exist, ignore cached info about it
;; from a previous visit.
(vc-file-clearprops buffer-file-name)
- (if (and (vc-backend buffer-file-name)
- (yes-or-no-p
- (format "File %s was lost; check out from version control? "
- (file-name-nondirectory buffer-file-name))))
- (save-excursion
- (require 'vc)
- (setq default-directory (file-name-directory buffer-file-name))
- (not (vc-error-occurred (vc-checkout buffer-file-name))))))
+ (let ((backend (vc-backend buffer-file-name)))
+ (if backend (vc-call-backend backend 'find-file-not-found-hook))))
+
+(defun vc-default-find-file-not-found-hook (backend)
+ (if (yes-or-no-p
+ (format "File %s was lost; check out from version control? "
+ (file-name-nondirectory buffer-file-name)))
+ (save-excursion
+ (require 'vc)
+ (setq default-directory (file-name-directory buffer-file-name))
+ (not (vc-error-occurred (vc-checkout buffer-file-name))))))
-(add-hook 'find-file-not-found-hook 'vc-file-not-found-hook)
+(add-hook 'find-file-not-found-functions 'vc-file-not-found-hook)
(defun vc-kill-buffer-hook ()
"Discard VC info about a file when we kill its buffer."
(provide 'vc-hooks)
+;; arch-tag: 2e5a6fa7-1d30-48e2-8bd0-e3d335f04f32
;;; vc-hooks.el ends here
HCoop / bpt / emacs.git / blobdiff