;;; vc-hooks.el --- resident support for version-control
-;; Copyright (C) 1992,93,94,95,96,98,99,2000,03,2004
+;; 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 1.162 2004/03/21 15:44:39 spiegel Exp $
+;; $Id$
;; This file is part of GNU Emacs.
"set `vc-handled-backends' to nil to disable VC.")
(defvar vc-master-templates ())
-(make-obsolete-variable 'vc-master-templates
- "to define master templates for a given BACKEND, use
+(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)
+(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.
(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))
(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."
- (let ((diff-args-length
- (length (cadr (symbol-function
- (vc-find-backend-function backend 'diff))))))
- (zerop (if (> diff-args-length 4)
- ;; 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*")
- ;; for backward compatibility
- (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.
(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 (file-symlink-p buffer-file-name))
- (link-type (and link (vc-backend (file-chase-links link)))))
+ ((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
;; from a previous visit.
(vc-file-clearprops buffer-file-name)
(let ((backend (vc-backend buffer-file-name)))
- (if backend (vc-call-backend backend find-file-not-found-hook))))
+ (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
(provide 'vc-hooks)
-;;; arch-tag: 2e5a6fa7-1d30-48e2-8bd0-e3d335f04f32
+;; arch-tag: 2e5a6fa7-1d30-48e2-8bd0-e3d335f04f32
;;; vc-hooks.el ends here