mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
1049 lines
42 KiB
EmacsLisp
1049 lines
42 KiB
EmacsLisp
;;; vc-hooks.el --- resident support for version-control
|
||
|
||
;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
|
||
;; 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
|
||
;; Free Software Foundation, Inc.
|
||
|
||
;; Author: FSF (see vc.el for full credits)
|
||
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs is free software: you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation, either version 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; GNU Emacs is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; This is the always-loaded portion of VC. It takes care of
|
||
;; VC-related activities that are done when you visit a file, so that
|
||
;; vc.el itself is loaded only when you use a VC command. See the
|
||
;; commentary of vc.el.
|
||
|
||
;;; Code:
|
||
|
||
(eval-when-compile
|
||
(require 'cl))
|
||
|
||
;; Customization Variables (the rest is in vc.el)
|
||
|
||
(defvar vc-ignore-vc-files nil)
|
||
(make-obsolete-variable 'vc-ignore-vc-files
|
||
"set `vc-handled-backends' to nil to disable VC."
|
||
"21.1")
|
||
|
||
(defvar vc-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'."
|
||
"21.1")
|
||
|
||
(defvar vc-header-alist ())
|
||
(make-obsolete-variable 'vc-header-alist 'vc-BACKEND-header "21.1")
|
||
|
||
(defcustom vc-ignore-dir-regexp
|
||
;; Stop SMB, automounter, AFS, and DFS host lookups.
|
||
locate-dominating-stop-dir-regexp
|
||
"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."
|
||
:type 'regexp
|
||
:group 'vc)
|
||
|
||
(defcustom vc-handled-backends '(RCS CVS SVN SCCS Bzr Git Hg Mtn Arch)
|
||
;; RCS, CVS, SVN and SCCS come first because they are per-dir
|
||
;; rather than per-tree. RCS comes first because of the multibackend
|
||
;; support intended to use RCS for local commits (with a remote CVS server).
|
||
"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.
|
||
Removing an entry from the list prevents VC from being activated
|
||
when visiting a file managed by that backend.
|
||
An empty list disables VC altogether."
|
||
:type '(repeat symbol)
|
||
:version "23.1"
|
||
:group 'vc)
|
||
|
||
;; Note: we don't actually have a darcs back end yet.
|
||
;; Also, Meta-CVS (corresponsding to MCVS) is unsupported.
|
||
(defcustom vc-directory-exclusion-list '("SCCS" "RCS" "CVS" "MCVS"
|
||
".svn" ".git" ".hg" ".bzr"
|
||
"_MTN" "_darcs" "{arch}")
|
||
"List of directory names to be ignored when walking directory trees."
|
||
:type '(repeat string)
|
||
:group 'vc)
|
||
|
||
(defcustom vc-path nil
|
||
"List of extra directories to search for version control commands."
|
||
:type '(repeat directory)
|
||
:group 'vc)
|
||
|
||
(defcustom vc-make-backup-files nil
|
||
"If non-nil, backups of registered files are made as with other files.
|
||
If nil (the default), files covered by version control don't get backups."
|
||
:type 'boolean
|
||
:group 'vc
|
||
:group 'backup)
|
||
|
||
(defcustom vc-follow-symlinks 'ask
|
||
"What to do if visiting a symbolic link to a file under version control.
|
||
Editing such a file through the link bypasses the version control system,
|
||
which is dangerous and probably not what you want.
|
||
|
||
If this variable is t, VC follows the link and visits the real file,
|
||
telling you about it in the echo area. If it is `ask', VC asks for
|
||
confirmation whether it should follow the link. If nil, the link is
|
||
visited and a warning displayed."
|
||
:type '(choice (const :tag "Ask for confirmation" ask)
|
||
(const :tag "Visit link and warn" nil)
|
||
(const :tag "Follow link" t))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-display-status t
|
||
"If non-nil, display revision number and lock status in modeline.
|
||
Otherwise, not displayed."
|
||
:type 'boolean
|
||
:group 'vc)
|
||
|
||
|
||
(defcustom vc-consult-headers t
|
||
"If non-nil, identify work files by searching for version headers."
|
||
:type 'boolean
|
||
:group 'vc)
|
||
|
||
(defcustom vc-keep-workfiles t
|
||
"If non-nil, don't delete working files after registering changes.
|
||
If the back-end is CVS, workfiles are always kept, regardless of the
|
||
value of this flag."
|
||
:type 'boolean
|
||
:group 'vc)
|
||
|
||
(defcustom vc-mistrust-permissions nil
|
||
"If non-nil, don't assume permissions/ownership track version-control status.
|
||
If nil, do rely on the permissions.
|
||
See also variable `vc-consult-headers'."
|
||
:type 'boolean
|
||
:group 'vc)
|
||
|
||
(defun vc-mistrust-permissions (file)
|
||
"Internal access function to variable `vc-mistrust-permissions' for FILE."
|
||
(or (eq vc-mistrust-permissions 't)
|
||
(and vc-mistrust-permissions
|
||
(funcall vc-mistrust-permissions
|
||
(vc-backend-subdirectory-name file)))))
|
||
|
||
(defcustom vc-stay-local 'only-file
|
||
"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.
|
||
|
||
If value is the symbol `only-file' `vc-dir' will connect to the
|
||
server, but heuristics will be used to determine the status for
|
||
all other VC operations.
|
||
|
||
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 "Only for file operations" only-file)
|
||
(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 "23.1"
|
||
:group 'vc)
|
||
|
||
(defun vc-stay-local-p (file &optional backend)
|
||
"Return non-nil if VC should stay local when handling FILE.
|
||
This uses the `repository-hostname' backend operation.
|
||
If FILE is a list of files, return non-nil if any of them
|
||
individually should stay local."
|
||
(if (listp file)
|
||
(delq nil (mapcar (lambda (arg) (vc-stay-local-p arg backend)) file))
|
||
(setq backend (or backend (vc-backend file)))
|
||
(let* ((sym (vc-make-backend-sym backend 'stay-local))
|
||
(stay-local (if (boundp sym) (symbol-value sym) 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))
|
||
|
||
;;;###autoload
|
||
(put 'vc-mode 'risky-local-variable t)
|
||
(make-variable-buffer-local 'vc-mode)
|
||
(put 'vc-mode 'permanent-local t)
|
||
|
||
(defun vc-mode (&optional arg)
|
||
;; Dummy function for C-h m
|
||
"Version Control minor mode.
|
||
This minor mode is automatically activated whenever you visit a file under
|
||
control of one of the revision control systems in `vc-handled-backends'.
|
||
VC commands are globally reachable under the prefix `\\[vc-prefix-map]':
|
||
\\{vc-prefix-map}")
|
||
|
||
(defmacro vc-error-occurred (&rest body)
|
||
`(condition-case nil (progn ,@body nil) (error t)))
|
||
|
||
;; We need a notion of per-file properties because the version
|
||
;; control state of a file is expensive to derive --- we compute
|
||
;; them when the file is initially found, keep them up to date
|
||
;; during any subsequent VC operations, and forget them when
|
||
;; the buffer is killed.
|
||
|
||
(defvar vc-file-prop-obarray (make-vector 17 0)
|
||
"Obarray for per-file properties.")
|
||
|
||
(defvar vc-touched-properties nil)
|
||
|
||
(defun vc-file-setprop (file property value)
|
||
"Set per-file VC PROPERTY for FILE to VALUE."
|
||
(if (and vc-touched-properties
|
||
(not (memq property vc-touched-properties)))
|
||
(setq vc-touched-properties (append (list property)
|
||
vc-touched-properties)))
|
||
(put (intern file vc-file-prop-obarray) property value))
|
||
|
||
(defun vc-file-getprop (file property)
|
||
"Get per-file VC PROPERTY for FILE."
|
||
(get (intern file vc-file-prop-obarray) property))
|
||
|
||
(defun vc-file-clearprops (file)
|
||
"Clear all VC properties of FILE."
|
||
(setplist (intern file vc-file-prop-obarray) nil))
|
||
|
||
|
||
;; We keep properties on each symbol naming a backend as follows:
|
||
;; * `vc-functions': an alist mapping vc-FUNCTION to vc-BACKEND-FUNCTION.
|
||
|
||
(defun vc-make-backend-sym (backend sym)
|
||
"Return BACKEND-specific version of VC symbol SYM."
|
||
(intern (concat "vc-" (downcase (symbol-name backend))
|
||
"-" (symbol-name sym))))
|
||
|
||
(defun vc-find-backend-function (backend fun)
|
||
"Return BACKEND-specific implementation of FUN.
|
||
If there is no such implementation, return the default implementation;
|
||
if that doesn't exist either, return nil."
|
||
(let ((f (vc-make-backend-sym backend fun)))
|
||
(if (fboundp f) f
|
||
;; Load vc-BACKEND.el if needed.
|
||
(require (intern (concat "vc-" (downcase (symbol-name backend)))))
|
||
(if (fboundp f) f
|
||
(let ((def (vc-make-backend-sym 'default fun)))
|
||
(if (fboundp def) (cons def backend) nil))))))
|
||
|
||
(defun vc-call-backend (backend function-name &rest args)
|
||
"Call for BACKEND the implementation of FUNCTION-NAME with the given ARGS.
|
||
Calls
|
||
|
||
(apply 'vc-BACKEND-FUN ARGS)
|
||
|
||
if vc-BACKEND-FUN exists (after trying to find it in vc-BACKEND.el)
|
||
and else calls
|
||
|
||
(apply 'vc-default-FUN BACKEND ARGS)
|
||
|
||
It is usually called via the `vc-call' macro."
|
||
(let ((f (assoc function-name (get backend 'vc-functions))))
|
||
(if f (setq f (cdr f))
|
||
(setq f (vc-find-backend-function backend function-name))
|
||
(push (cons function-name f) (get backend 'vc-functions)))
|
||
(cond
|
||
((null f)
|
||
(error "Sorry, %s is not implemented for %s" function-name backend))
|
||
((consp f) (apply (car f) (cdr f) args))
|
||
(t (apply f args)))))
|
||
|
||
(defmacro vc-call (fun file &rest args)
|
||
"A convenience macro for calling VC backend functions.
|
||
Functions called by this macro must accept FILE as the first argument.
|
||
ARGS specifies any additional arguments. FUN should be unquoted.
|
||
BEWARE!! FILE is evaluated twice!!"
|
||
`(vc-call-backend (vc-backend ,file) ',fun ,file ,@args))
|
||
|
||
(defsubst vc-parse-buffer (pattern i)
|
||
"Find PATTERN in the current buffer and return its Ith submatch."
|
||
(goto-char (point-min))
|
||
(if (re-search-forward pattern nil t)
|
||
(match-string i)))
|
||
|
||
(defun vc-insert-file (file &optional limit blocksize)
|
||
"Insert the contents of FILE into the current buffer.
|
||
|
||
Optional argument LIMIT is a regexp. If present, the file is inserted
|
||
in chunks of size BLOCKSIZE (default 8 kByte), until the first
|
||
occurrence of LIMIT is found. Anything from the start of that occurrence
|
||
to the end of the buffer is then deleted. The function returns
|
||
non-nil if FILE exists and its contents were successfully inserted."
|
||
(erase-buffer)
|
||
(when (file-exists-p file)
|
||
(if (not limit)
|
||
(insert-file-contents file)
|
||
(unless blocksize (setq blocksize 8192))
|
||
(let ((filepos 0))
|
||
(while
|
||
(and (< 0 (cadr (insert-file-contents
|
||
file nil filepos (incf filepos blocksize))))
|
||
(progn (beginning-of-line)
|
||
(let ((pos (re-search-forward limit nil 'move)))
|
||
(when pos (delete-region (match-beginning 0)
|
||
(point-max)))
|
||
(not pos)))))))
|
||
(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 ((locate-dominating-stop-dir-regexp
|
||
(or vc-ignore-dir-regexp locate-dominating-stop-dir-regexp)))
|
||
(locate-dominating-file file witness)))
|
||
|
||
;; Access functions to file properties
|
||
;; (Properties should be _set_ using vc-file-setprop, but
|
||
;; _retrieved_ only through these functions, which decide
|
||
;; if the property is already known or not. A property should
|
||
;; only be retrieved by vc-file-getprop if there is no
|
||
;; access function.)
|
||
|
||
;; properties indicating the backend being used for FILE
|
||
|
||
(defun vc-registered (file)
|
||
"Return non-nil if FILE is registered in a version control system.
|
||
|
||
This function performs the check each time it is called. To rely
|
||
on the result of a previous call, use `vc-backend' instead. If the
|
||
file was previously registered under a certain backend, then that
|
||
backend is tried first."
|
||
(let (handler)
|
||
(cond
|
||
((and (file-name-directory file)
|
||
(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
|
||
(let ((backend (vc-file-getprop file 'vc-backend)))
|
||
(mapc
|
||
(lambda (b)
|
||
(and (vc-call-backend b 'registered file)
|
||
(vc-file-setprop file 'vc-backend b)
|
||
(throw 'found t)))
|
||
(if (or (not backend) (eq backend 'none))
|
||
vc-handled-backends
|
||
(cons backend vc-handled-backends))))
|
||
;; File is not registered.
|
||
(vc-file-setprop file 'vc-backend 'none)
|
||
nil)))))
|
||
|
||
(defun vc-backend (file-or-list)
|
||
"Return the version control type of FILE-OR-LIST, nil if it's not registered.
|
||
If the argument is a list, the files must all have the same back end."
|
||
;; `file' can be nil in several places (typically due to the use of
|
||
;; code like (vc-backend buffer-file-name)).
|
||
(cond ((stringp file-or-list)
|
||
(let ((property (vc-file-getprop file-or-list 'vc-backend)))
|
||
;; Note that internally, Emacs remembers unregistered
|
||
;; files by setting the property to `none'.
|
||
(cond ((eq property 'none) nil)
|
||
(property)
|
||
;; vc-registered sets the vc-backend property
|
||
(t (if (vc-registered file-or-list)
|
||
(vc-file-getprop file-or-list 'vc-backend)
|
||
nil)))))
|
||
((and file-or-list (listp file-or-list))
|
||
(vc-backend (car file-or-list)))
|
||
(t
|
||
nil)))
|
||
|
||
|
||
(defun vc-backend-subdirectory-name (file)
|
||
"Return where the master and lock FILEs for the current directory are kept."
|
||
(symbol-name (vc-backend file)))
|
||
|
||
(defun vc-name (file)
|
||
"Return the master name of FILE.
|
||
If the file is not registered, or the master name is not known, return nil."
|
||
;; TODO: This should ultimately become obsolete, at least up here
|
||
;; in vc-hooks.
|
||
(or (vc-file-getprop file 'vc-name)
|
||
;; force computation of the property by calling
|
||
;; vc-BACKEND-registered explicitly
|
||
(let ((backend (vc-backend file)))
|
||
(if (and backend
|
||
(vc-call-backend backend 'registered file))
|
||
(vc-file-getprop file 'vc-name)))))
|
||
|
||
(defun vc-checkout-model (backend files)
|
||
"Indicate how FILES are checked out.
|
||
|
||
If FILES are not registered, this function always returns nil.
|
||
For registered files, the possible values are:
|
||
|
||
'implicit FILES are always writable, and checked out `implicitly'
|
||
when the user saves the first changes to the file.
|
||
|
||
'locking FILES are read-only if up-to-date; user must type
|
||
\\[vc-next-action] before editing. Strict locking
|
||
is assumed.
|
||
|
||
'announce FILES are read-only if up-to-date; user must type
|
||
\\[vc-next-action] before editing. But other users
|
||
may be editing at the same time."
|
||
(vc-call-backend backend 'checkout-model files))
|
||
|
||
(defun vc-user-login-name (file)
|
||
"Return the name under which the user accesses the given FILE."
|
||
(or (and (eq (string-match tramp-file-name-regexp file) 0)
|
||
;; tramp case: execute "whoami" via tramp
|
||
(let ((default-directory (file-name-directory file))
|
||
process-file-side-effects)
|
||
(with-temp-buffer
|
||
(if (not (zerop (process-file "whoami" nil t)))
|
||
;; fall through if "whoami" didn't work
|
||
nil
|
||
;; remove trailing newline
|
||
(delete-region (1- (point-max)) (point-max))
|
||
(buffer-string)))))
|
||
;; normal case
|
||
(user-login-name)
|
||
;; if user-login-name is nil, return the UID as a string
|
||
(number-to-string (user-uid))))
|
||
|
||
(defun vc-state (file &optional backend)
|
||
"Return the version control state of FILE.
|
||
|
||
If FILE is not registered, this function always returns nil.
|
||
For registered files, the value returned is one of:
|
||
|
||
'up-to-date The working file is unmodified with respect to the
|
||
latest version on the current branch, and not locked.
|
||
|
||
'edited The working file has been edited by the user. If
|
||
locking is used for the file, this state means that
|
||
the current version is locked by the calling user.
|
||
|
||
USER The current version of the working file is locked by
|
||
some other USER (a string).
|
||
|
||
'needs-update The file has not been edited by the user, but there is
|
||
a more recent version on the current branch stored
|
||
in the master file.
|
||
|
||
'needs-merge The file has been edited by the user, and there is also
|
||
a more recent version on the current branch stored in
|
||
the master file. This state can only occur if locking
|
||
is not used for the file.
|
||
|
||
'unlocked-changes The working version of the file is not locked,
|
||
but the working file has been changed with respect
|
||
to that version. This state can only occur for files
|
||
with locking; it represents an erroneous condition that
|
||
should be resolved by the user (vc-next-action will
|
||
prompt the user to do it).
|
||
|
||
'added Scheduled to go into the repository on the next commit.
|
||
Often represented by vc-working-revision = \"0\" in VCSes
|
||
with monotonic IDs like Subversion and Mercurial.
|
||
|
||
'removed Scheduled to be deleted from the repository on next commit.
|
||
|
||
'conflict The file contains conflicts as the result of a merge.
|
||
For now the conflicts are text conflicts. In the
|
||
future this might be extended to deal with metadata
|
||
conflicts too.
|
||
|
||
'missing The file is not present in the file system, but the VC
|
||
system still tracks it.
|
||
|
||
'ignored The file showed up in a dir-status listing with a flag
|
||
indicating the version-control system is ignoring it,
|
||
Note: This property is not set reliably (some VCSes
|
||
don't have useful directory-status commands) so assume
|
||
that any file with vc-state nil might be ignorable
|
||
without VC knowing it.
|
||
|
||
'unregistered The file is not under version control.
|
||
|
||
A return of nil from this function means we have no information on the
|
||
status of this file."
|
||
;; Note: in Emacs 22 and older, return of nil meant the file was
|
||
;; unregistered. This is potentially a source of
|
||
;; backward-compatibility bugs.
|
||
|
||
;; FIXME: New (sub)states needed (?):
|
||
;; - `copied' and `moved' (might be handled by `removed' and `added')
|
||
(or (vc-file-getprop file 'vc-state)
|
||
(when (> (length file) 0) ;Why?? --Stef
|
||
(setq backend (or backend (vc-backend file)))
|
||
(when backend
|
||
(vc-state-refresh file backend)))))
|
||
|
||
(defun vc-state-refresh (file backend)
|
||
"Quickly recompute the `state' of FILE."
|
||
(vc-file-setprop
|
||
file 'vc-state
|
||
(vc-call-backend backend 'state-heuristic 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-state-heuristic (backend file)
|
||
"Default implementation of vc-BACKEND-state-heuristic.
|
||
It simply calls the real state computation function `vc-BACKEND-state'
|
||
and does not employ any heuristic at all."
|
||
(vc-call-backend backend 'state file))
|
||
|
||
(defun vc-workfile-unchanged-p (file)
|
||
"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))))
|
||
;; This is a shortcut for determining when the workfile is
|
||
;; unchanged. It can fail under some circumstances; see the
|
||
;; discussion in bug#694.
|
||
(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))
|
||
unchanged))))
|
||
|
||
(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."
|
||
(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-backend backend 'diff (list 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 backend 'diff))))
|
||
(not (eq (caddr err) 4)))
|
||
(signal (car err) (cdr err))
|
||
(vc-call-backend backend 'diff (list file)))))))
|
||
|
||
(defun vc-working-revision (file &optional backend)
|
||
"Return the repository version from which FILE was checked out.
|
||
If FILE is not registered, this function always returns nil."
|
||
(or (vc-file-getprop file 'vc-working-revision)
|
||
(progn
|
||
(setq backend (or backend (vc-backend file)))
|
||
(when backend
|
||
(vc-file-setprop file 'vc-working-revision
|
||
(vc-call-backend backend 'working-revision file))))))
|
||
|
||
;; Backward compatibility.
|
||
(define-obsolete-function-alias
|
||
'vc-workfile-version 'vc-working-revision "23.1")
|
||
(defun vc-default-working-revision (backend file)
|
||
(message
|
||
"`working-revision' not found: using the old `workfile-version' instead")
|
||
(vc-call-backend backend 'workfile-version file))
|
||
|
||
(defun vc-default-registered (backend file)
|
||
"Check if FILE is registered in BACKEND using vc-BACKEND-master-templates."
|
||
(let ((sym (vc-make-backend-sym backend 'master-templates)))
|
||
(unless (get backend 'vc-templates-grabbed)
|
||
(put backend 'vc-templates-grabbed t)
|
||
(set sym (append (delq nil
|
||
(mapcar
|
||
(lambda (template)
|
||
(and (consp template)
|
||
(eq (cdr template) backend)
|
||
(car template)))
|
||
(with-no-warnings
|
||
vc-master-templates)))
|
||
(symbol-value sym))))
|
||
(let ((result (vc-check-master-templates file (symbol-value sym))))
|
||
(if (stringp result)
|
||
(vc-file-setprop file 'vc-name result)
|
||
nil)))) ; Not registered
|
||
|
||
(defun vc-possible-master (s dirname basename)
|
||
(cond
|
||
((stringp s) (format s dirname basename))
|
||
((functionp s)
|
||
;; The template is a function to invoke. If the
|
||
;; function returns non-nil, that means it has found a
|
||
;; master. For backward compatibility, we also handle
|
||
;; the case that the function throws a 'found atom
|
||
;; and a pair (cons MASTER-FILE BACKEND).
|
||
(let ((result (catch 'found (funcall s dirname basename))))
|
||
(if (consp result) (car result) result)))))
|
||
|
||
(defun vc-check-master-templates (file templates)
|
||
"Return non-nil if there is a master corresponding to FILE.
|
||
|
||
TEMPLATES is a list of strings or functions. If an element is a
|
||
string, it must be a control string as required by `format', with two
|
||
string placeholders, such as \"%sRCS/%s,v\". The directory part of
|
||
FILE is substituted for the first placeholder, the basename of FILE
|
||
for the second. If a file with the resulting name exists, it is taken
|
||
as the master of FILE, and returned.
|
||
|
||
If an element of TEMPLATES is a function, it is called with the
|
||
directory part and the basename of FILE as arguments. It should
|
||
return non-nil if it finds a master; that value is then returned by
|
||
this function."
|
||
(let ((dirname (or (file-name-directory file) ""))
|
||
(basename (file-name-nondirectory file)))
|
||
(catch 'found
|
||
(mapcar
|
||
(lambda (s)
|
||
(let ((trial (vc-possible-master s dirname basename)))
|
||
(when (and trial (file-exists-p trial)
|
||
;; Make sure the file we found with name
|
||
;; TRIAL is not the source file itself.
|
||
;; That can happen with RCS-style names if
|
||
;; the file name is truncated (e.g. to 14
|
||
;; chars). See if either directory or
|
||
;; attributes differ.
|
||
(or (not (string= dirname
|
||
(file-name-directory trial)))
|
||
(not (equal (file-attributes file)
|
||
(file-attributes trial)))))
|
||
(throw 'found trial))))
|
||
templates))))
|
||
|
||
(defun vc-toggle-read-only (&optional verbose)
|
||
"Change read-only status of current buffer, perhaps via version control.
|
||
|
||
If the buffer is visiting a file registered with version control,
|
||
throw an error, because this is not a safe or really meaningful operation
|
||
on any version-control system newer than RCS.
|
||
|
||
Otherwise, just change the read-only flag of the buffer.
|
||
|
||
If you bind this function to \\[toggle-read-only], then Emacs
|
||
will properly intercept all attempts to toggle the read-only flag
|
||
on version-controlled buffer."
|
||
(interactive "P")
|
||
(if (vc-backend buffer-file-name)
|
||
(error "Toggling the readability of a version controlled file is likely to wreak havoc")
|
||
(toggle-read-only)))
|
||
|
||
(defun vc-default-make-version-backups-p (backend file)
|
||
"Return non-nil if unmodified versions should be backed up locally.
|
||
The default is to switch off this feature."
|
||
nil)
|
||
|
||
(defun vc-version-backup-file-name (file &optional rev manual regexp)
|
||
"Return a backup file name for REV or the current version of FILE.
|
||
If MANUAL is non-nil it means that a name for backups created by
|
||
the user should be returned; if REGEXP is non-nil that means to return
|
||
a regexp for matching all such backup files, regardless of the version."
|
||
(if regexp
|
||
(concat (regexp-quote (file-name-nondirectory file))
|
||
"\\.~.+" (unless manual "\\.") "~")
|
||
(expand-file-name (concat (file-name-nondirectory file)
|
||
".~" (subst-char-in-string
|
||
?/ ?_ (or rev (vc-working-revision file)))
|
||
(unless manual ".") "~")
|
||
(file-name-directory file))))
|
||
|
||
(defun vc-delete-automatic-version-backups (file)
|
||
"Delete all existing automatic version backups for FILE."
|
||
(condition-case nil
|
||
(mapc
|
||
'delete-file
|
||
(directory-files (or (file-name-directory file) default-directory) t
|
||
(vc-version-backup-file-name file nil nil t)))
|
||
;; Don't fail when the directory doesn't exist.
|
||
(file-error nil)))
|
||
|
||
(defun vc-make-version-backup (file)
|
||
"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 (with-no-warnings (msdos-long-file-names))))
|
||
(vc-delete-automatic-version-backups file)
|
||
(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)."
|
||
;; If the file on disk is still in sync with the repository,
|
||
;; and version backups should be made, copy the file to
|
||
;; another name. This enables local diffs and local reverting.
|
||
(let ((file buffer-file-name)
|
||
backend)
|
||
(ignore-errors ;Be careful not to prevent saving the file.
|
||
(and (setq backend (vc-backend file))
|
||
(vc-up-to-date-p file)
|
||
(eq (vc-checkout-model backend (list file)) 'implicit)
|
||
(vc-call-backend backend 'make-version-backups-p file)
|
||
(vc-make-version-backup file)))))
|
||
|
||
(declare-function vc-dir-resynch-file "vc-dir" (&optional fname))
|
||
|
||
(defvar vc-dir-buffers nil "List of vc-dir buffers.")
|
||
|
||
(defun vc-after-save ()
|
||
"Function to be called by `basic-save-buffer' (in files.el)."
|
||
;; If the file in the current buffer is under version control,
|
||
;; up-to-date, and locking is not used for the file, set
|
||
;; the state to 'edited and redisplay the mode line.
|
||
(let* ((file buffer-file-name)
|
||
(backend (vc-backend file)))
|
||
(and backend
|
||
(or (and (equal (vc-file-getprop file 'vc-checkout-time)
|
||
(nth 5 (file-attributes file)))
|
||
;; File has been saved in the same second in which
|
||
;; it was checked out. Clear the checkout-time
|
||
;; to avoid confusion.
|
||
(vc-file-setprop file 'vc-checkout-time nil))
|
||
t)
|
||
(eq (vc-checkout-model backend (list file)) 'implicit)
|
||
(vc-state-refresh file backend)
|
||
(vc-mode-line file backend))
|
||
;; Try to avoid unnecessary work, a *vc-dir* buffer is
|
||
;; present if this is true.
|
||
(when vc-dir-buffers
|
||
(vc-dir-resynch-file file))))
|
||
|
||
(defvar vc-menu-entry
|
||
`(menu-item ,(purecopy "Version Control") vc-menu-map
|
||
:filter vc-menu-map-filter))
|
||
|
||
(when (boundp 'menu-bar-tools-menu)
|
||
;; We do not need to worry here about the placement of this entry
|
||
;; because menu-bar.el has already created the proper spot for us
|
||
;; and this will simply use it.
|
||
(define-key menu-bar-tools-menu [vc] vc-menu-entry))
|
||
|
||
(defconst vc-mode-line-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [mode-line down-mouse-1] vc-menu-entry)
|
||
map))
|
||
|
||
(defun vc-mode-line (file &optional backend)
|
||
"Set `vc-mode' to display type of version control for FILE.
|
||
The value is set in the current buffer, which should be the buffer
|
||
visiting FILE.
|
||
If BACKEND is passed use it as the VC backend when computing the result."
|
||
(interactive (list buffer-file-name))
|
||
(setq backend (or backend (vc-backend file)))
|
||
(if (not backend)
|
||
(setq vc-mode nil)
|
||
(let* ((ml-string (vc-call-backend backend 'mode-line-string file))
|
||
(ml-echo (get-text-property 0 'help-echo ml-string)))
|
||
(setq vc-mode
|
||
(concat
|
||
" "
|
||
(if (null vc-display-status)
|
||
(symbol-name backend)
|
||
(propertize
|
||
ml-string
|
||
'mouse-face 'mode-line-highlight
|
||
'help-echo
|
||
(concat (or ml-echo
|
||
(format "File under the %s version control system"
|
||
backend))
|
||
"\nmouse-1: Version Control menu")
|
||
'local-map vc-mode-line-map)))))
|
||
;; If the user is root, and the file is not owner-writable,
|
||
;; then pretend that we can't write it
|
||
;; even though we can (because root can write anything).
|
||
;; This way, even root cannot modify a file that isn't locked.
|
||
(and (equal file buffer-file-name)
|
||
(not buffer-read-only)
|
||
(zerop (user-real-uid))
|
||
(zerop (logand (file-modes buffer-file-name) 128))
|
||
(setq buffer-read-only t)))
|
||
(force-mode-line-update)
|
||
backend)
|
||
|
||
(defun vc-default-mode-line-string (backend file)
|
||
"Return string for placement in modeline by `vc-mode-line' for FILE.
|
||
Format:
|
||
|
||
\"BACKEND-REV\" if the file is up-to-date
|
||
\"BACKEND:REV\" if the file is edited (or locked by the calling user)
|
||
\"BACKEND:LOCKER:REV\" if the file is locked by somebody else
|
||
|
||
This function assumes that the file is registered."
|
||
(let* ((backend-name (symbol-name backend))
|
||
(state (vc-state file backend))
|
||
(state-echo nil)
|
||
(rev (vc-working-revision file backend)))
|
||
(propertize
|
||
(cond ((or (eq state 'up-to-date)
|
||
(eq state 'needs-update))
|
||
(setq state-echo "Up to date file")
|
||
(concat backend-name "-" rev))
|
||
((stringp state)
|
||
(setq state-echo (concat "File locked by" state))
|
||
(concat backend-name ":" state ":" rev))
|
||
((eq state 'added)
|
||
(setq state-echo "Locally added file")
|
||
(concat backend-name "@" rev))
|
||
((eq state 'conflict)
|
||
(setq state-echo "File contains conflicts after the last merge")
|
||
(concat backend-name "!" rev))
|
||
((eq state 'removed)
|
||
(setq state-echo "File removed from the VC system")
|
||
(concat backend-name "!" rev))
|
||
((eq state 'missing)
|
||
(setq state-echo "File tracked by the VC system, but missing from the file system")
|
||
(concat backend-name "?" rev))
|
||
(t
|
||
;; Not just for the 'edited state, but also a fallback
|
||
;; for all other states. Think about different symbols
|
||
;; for 'needs-update and 'needs-merge.
|
||
(setq state-echo "Locally modified file")
|
||
(concat backend-name ":" rev)))
|
||
'help-echo (concat state-echo " under the " backend-name
|
||
" version control system"))))
|
||
|
||
(defun vc-follow-link ()
|
||
"If current buffer visits a symbolic link, visit the real file.
|
||
If the real file is already visited in another buffer, make that buffer
|
||
current, and kill the buffer that visits the link."
|
||
(let* ((true-buffer (find-buffer-visiting buffer-file-truename))
|
||
(this-buffer (current-buffer)))
|
||
(if (eq true-buffer this-buffer)
|
||
(let ((truename buffer-file-truename))
|
||
(kill-buffer this-buffer)
|
||
;; In principle, we could do something like set-visited-file-name.
|
||
;; However, it can't be exactly the same as set-visited-file-name.
|
||
;; I'm not going to work out the details right now. -- rms.
|
||
(set-buffer (find-file-noselect truename)))
|
||
(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,
|
||
;; if user has killed the buffer and revisited.
|
||
(when vc-mode
|
||
(setq vc-mode nil))
|
||
(when buffer-file-name
|
||
(vc-file-clearprops buffer-file-name)
|
||
(add-hook 'mode-line-hook 'vc-mode-line nil t)
|
||
(let (backend)
|
||
(cond
|
||
((setq backend (with-demoted-errors (vc-backend buffer-file-name)))
|
||
;; Compute the state and put it in the modeline.
|
||
(vc-mode-line buffer-file-name backend)
|
||
(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 the backend setup any buffer-local things he needs.
|
||
(vc-call-backend backend 'find-file-hook))
|
||
((let ((link-type (and (not (equal buffer-file-name buffer-file-truename))
|
||
(vc-backend buffer-file-truename))))
|
||
(cond ((not link-type) nil) ;Nothing to do.
|
||
((eq vc-follow-symlinks nil)
|
||
(message
|
||
"Warning: symbolic link to %s-controlled source file" link-type))
|
||
((or (not (eq vc-follow-symlinks 'ask))
|
||
;; If we already visited this file by following
|
||
;; the link, don't ask again if we try to visit
|
||
;; it again. GUD does that, and repeated questions
|
||
;; are painful.
|
||
(get-file-buffer
|
||
(abbreviate-file-name
|
||
(file-chase-links buffer-file-name))))
|
||
|
||
(vc-follow-link)
|
||
(message "Followed link to %s" buffer-file-name)
|
||
(vc-find-file-hook))
|
||
(t
|
||
(if (yes-or-no-p (format
|
||
"Symbolic link to %s-controlled source file; follow link? " link-type))
|
||
(progn (vc-follow-link)
|
||
(message "Followed link to %s" buffer-file-name)
|
||
(vc-find-file-hook))
|
||
(message
|
||
"Warning: editing through the link bypasses version control")
|
||
)))))))))
|
||
|
||
(add-hook 'find-file-hook 'vc-find-file-hook)
|
||
|
||
(defun vc-kill-buffer-hook ()
|
||
"Discard VC info about a file when we kill its buffer."
|
||
(when buffer-file-name (vc-file-clearprops buffer-file-name)))
|
||
|
||
(add-hook 'kill-buffer-hook 'vc-kill-buffer-hook)
|
||
|
||
;; Now arrange for (autoloaded) bindings of the main package.
|
||
;; Bindings for this have to go in the global map, as we'll often
|
||
;; want to call them from random buffers.
|
||
|
||
;; Autoloading works fine, but it prevents shortcuts from appearing
|
||
;; in the menu because they don't exist yet when the menu is built.
|
||
;; (autoload 'vc-prefix-map "vc" nil nil 'keymap)
|
||
(defvar vc-prefix-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map "a" 'vc-update-change-log)
|
||
(define-key map "b" 'vc-switch-backend)
|
||
(define-key map "c" 'vc-rollback)
|
||
(define-key map "d" 'vc-dir)
|
||
(define-key map "g" 'vc-annotate)
|
||
(define-key map "h" 'vc-insert-headers)
|
||
(define-key map "i" 'vc-register)
|
||
(define-key map "l" 'vc-print-log)
|
||
(define-key map "L" 'vc-print-root-log)
|
||
(define-key map "m" 'vc-merge)
|
||
(define-key map "r" 'vc-retrieve-tag)
|
||
(define-key map "s" 'vc-create-tag)
|
||
(define-key map "u" 'vc-revert)
|
||
(define-key map "v" 'vc-next-action)
|
||
(define-key map "+" 'vc-update)
|
||
(define-key map "=" 'vc-diff)
|
||
(define-key map "D" 'vc-root-diff)
|
||
(define-key map "~" 'vc-revision-other-window)
|
||
map))
|
||
(fset 'vc-prefix-map vc-prefix-map)
|
||
(define-key global-map "\C-xv" 'vc-prefix-map)
|
||
|
||
(defvar vc-menu-map
|
||
(let ((map (make-sparse-keymap "Version Control")))
|
||
;;(define-key map [show-files]
|
||
;; '("Show Files under VC" . (vc-directory t)))
|
||
(define-key map [vc-retrieve-tag]
|
||
`(menu-item ,(purecopy "Retrieve Tag") vc-retrieve-tag
|
||
:help ,(purecopy "Retrieve tagged version or branch")))
|
||
(define-key map [vc-create-tag]
|
||
`(menu-item ,(purecopy "Create Tag") vc-create-tag
|
||
:help ,(purecopy "Create version tag")))
|
||
(define-key map [separator1] '("----"))
|
||
(define-key map [vc-annotate]
|
||
`(menu-item ,(purecopy "Annotate") vc-annotate
|
||
:help ,(purecopy "Display the edit history of the current file using colors")))
|
||
(define-key map [vc-rename-file]
|
||
`(menu-item ,(purecopy "Rename File") vc-rename-file
|
||
:help ,(purecopy "Rename file")))
|
||
(define-key map [vc-revision-other-window]
|
||
`(menu-item ,(purecopy "Show Other Version") vc-revision-other-window
|
||
:help ,(purecopy "Visit another version of the current file in another window")))
|
||
(define-key map [vc-diff]
|
||
`(menu-item ,(purecopy "Compare with Base Version") vc-diff
|
||
:help ,(purecopy "Compare file set with the base version")))
|
||
(define-key map [vc-root-diff]
|
||
`(menu-item ,(purecopy "Compare Tree with Base Version") vc-root-diff
|
||
:help ,(purecopy "Compare current tree with the base version")))
|
||
(define-key map [vc-update-change-log]
|
||
`(menu-item ,(purecopy "Update ChangeLog") vc-update-change-log
|
||
:help ,(purecopy "Find change log file and add entries from recent version control logs")))
|
||
(define-key map [vc-print-log]
|
||
`(menu-item ,(purecopy "Show History") vc-print-log
|
||
:help ,(purecopy "List the change log of the current file set in a window")))
|
||
(define-key map [vc-print-root-log]
|
||
`(menu-item ,(purecopy "Show Top of the Tree History ") vc-print-root-log
|
||
:help ,(purecopy "List the change log for the current tree in a window")))
|
||
(define-key map [separator2] '("----"))
|
||
(define-key map [vc-insert-header]
|
||
`(menu-item ,(purecopy "Insert Header") vc-insert-headers
|
||
:help ,(purecopy "Insert headers into a file for use with a version control system.
|
||
")))
|
||
(define-key map [undo]
|
||
`(menu-item ,(purecopy "Undo Last Check-In") vc-rollback
|
||
:help ,(purecopy "Remove the most recent changeset committed to the repository")))
|
||
(define-key map [vc-revert]
|
||
`(menu-item ,(purecopy "Revert to Base Version") vc-revert
|
||
:help ,(purecopy "Revert working copies of the selected file set to their repository contents")))
|
||
(define-key map [vc-update]
|
||
`(menu-item ,(purecopy "Update to Latest Version") vc-update
|
||
:help ,(purecopy "Update the current fileset's files to their tip revisions")))
|
||
(define-key map [vc-next-action]
|
||
`(menu-item ,(purecopy "Check In/Out") vc-next-action
|
||
:help ,(purecopy "Do the next logical version control operation on the current fileset")))
|
||
(define-key map [vc-register]
|
||
`(menu-item ,(purecopy "Register") vc-register
|
||
:help ,(purecopy "Register file set into a version control system")))
|
||
(define-key map [vc-dir]
|
||
`(menu-item ,(purecopy "VC Dir") vc-dir
|
||
:help ,(purecopy "Show the VC status of files in a directory")))
|
||
map))
|
||
|
||
(defalias 'vc-menu-map vc-menu-map)
|
||
|
||
(declare-function vc-responsible-backend "vc" (file))
|
||
|
||
(defun vc-menu-map-filter (orig-binding)
|
||
(if (and (symbolp orig-binding) (fboundp orig-binding))
|
||
(setq orig-binding (indirect-function orig-binding)))
|
||
(let ((ext-binding
|
||
(when vc-mode
|
||
(vc-call-backend
|
||
(if buffer-file-name
|
||
(vc-backend buffer-file-name)
|
||
(vc-responsible-backend default-directory))
|
||
'extra-menu))))
|
||
;; Give the VC backend a chance to add menu entries
|
||
;; specific for that backend.
|
||
(if (null ext-binding)
|
||
orig-binding
|
||
(append orig-binding
|
||
'((ext-menu-separator "---"))
|
||
ext-binding))))
|
||
|
||
(defun vc-default-extra-menu (backend)
|
||
nil)
|
||
|
||
(provide 'vc-hooks)
|
||
|
||
;; arch-tag: 2e5a6fa7-1d30-48e2-8bd0-e3d335f04f32
|
||
;;; vc-hooks.el ends here
|