;;; vc.el --- drive a version-control system from within Emacs
;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
-;; 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+;; 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
;; Free Software Foundation, Inc.
;; Author: FSF (see below for full credits)
;;
;; HISTORY FUNCTIONS
;;
-;; * print-log (files &optional buffer shortlog)
+;; * print-log (files buffer &optional shortlog start-revision limit)
;;
-;; Insert the revision log for FILES into BUFFER, or the *vc* buffer
-;; if BUFFER is nil. (Note: older versions of this function expected
-;; only a single file argument.)
+;; Insert the revision log for FILES into BUFFER.
;; If SHORTLOG is true insert a short version of the log.
+;; If LIMIT is true insert only insert LIMIT log entries. If the
+;; backend does not support limiting the number of entries to show
+;; it should return `limit-unsupported'.
+;; If START-REVISION is given, then show the log starting from the
+;; revision. At this point START-REVISION is only required to work
+;; in conjunction with LIMIT = 1.
;;
;; - log-view-mode ()
;;
;; Invoked from a buffer in vc-annotate-mode, return the revision
;; corresponding to the current line, or nil if there is no revision
;; corresponding to the current line.
+;; If the backend supports annotating through copies and renames,
+;; and displays a file name and a revision, then return a cons
+;; (REVISION . FILENAME).
;;
;; TAG SYSTEM
;;
;; - vc-create-tag and vc-retrieve-tag should update the
;; buffers that might be visiting the affected files.
;;
-;;;; Default Behavior:
-;;
-;; - vc-responsible-backend should not return RCS if no backend
-;; declares itself responsible.
-;;
;;;; Internal cleanups:
;;
;; - backends that care about vc-stay-local should try to take it into
(require 'vc-dispatcher)
(eval-when-compile
- (require 'cl))
+ (require 'cl)
+ (require 'dired))
(unless (assoc 'vc-parent-buffer minor-mode-alist)
(setq minor-mode-alist
:type '(choice (const :tag "Work out" nil) (const yes) (const no))
:group 'vc)
+(defcustom vc-log-show-limit 2000
+ "Limit the number of items shown by the VC log commands.
+Zero means unlimited.
+Not all VC backends are able to support this feature."
+ :type 'integer
+ :group 'vc)
+
(defcustom vc-allow-async-revert nil
"Specifies whether the diff during \\[vc-revert] may be asynchronous.
Enabling this option means that you can confirm a revert operation even
(defmacro with-vc-properties (files form settings)
"Execute FORM, then maybe set per-file properties for FILES.
+If any of FILES is actually a directory, then do the same for all
+buffers for files in that directory.
SETTINGS is an association list of property/value pairs. After
executing FORM, set those properties from SETTINGS that have not yet
been updated to their corresponding values."
(declare (debug t))
- `(let ((vc-touched-properties (list t)))
- ,form
+ `(let ((vc-touched-properties (list t))
+ (flist nil))
(dolist (file ,files)
+ (if (file-directory-p file)
+ (dolist (buffer (buffer-list))
+ (let ((fname (buffer-file-name buffer)))
+ (when (and fname (vc-string-prefix-p file fname))
+ (push fname flist))))
+ (push file flist)))
+ ,form
+ (dolist (file flist)
(dolist (setting ,settings)
(let ((property (car setting)))
(unless (memq property vc-touched-properties)
;;; Code for deducing what fileset and backend to assume
-(defun vc-responsible-backend (file &optional register)
+(defun vc-backend-for-registration (file)
+ "Return a backend that can be used for registering FILE.
+
+If no backend declares itself responsible for FILE, then FILE
+must not be in a version controlled directory, so try to create a
+repository, prompting for the directory and the VC backend to
+use."
+ (catch 'found
+ ;; First try: find a responsible backend, it must be a backend
+ ;; under which FILE is not yet registered.
+ (dolist (backend vc-handled-backends)
+ (and (not (vc-call-backend backend 'registered file))
+ (vc-call-backend backend 'responsible-p file)
+ (throw 'found backend)))
+ ;; no responsible backend
+ (let* ((possible-backends
+ (let (pos)
+ (dolist (crt vc-handled-backends)
+ (when (vc-find-backend-function crt 'create-repo)
+ (push crt pos)))
+ pos))
+ (bk
+ (intern
+ ;; Read the VC backend from the user, only
+ ;; complete with the backends that have the
+ ;; 'create-repo method.
+ (completing-read
+ (format "%s is not in a version controlled directory.\nUse VC backend: " file)
+ (mapcar 'symbol-name possible-backends) nil t)))
+ (repo-dir
+ (let ((def-dir (file-name-directory file)))
+ ;; read the directory where to create the
+ ;; repository, make sure it's a parent of
+ ;; file.
+ (read-file-name
+ (format "create %s repository in: " bk)
+ default-directory def-dir t nil
+ (lambda (arg)
+ (message "arg %s" arg)
+ (and (file-directory-p arg)
+ (vc-string-prefix-p (expand-file-name arg) def-dir)))))))
+ (let ((default-directory repo-dir))
+ (vc-call-backend bk 'create-repo))
+ (throw 'found bk))))
+
+(defun vc-responsible-backend (file)
"Return the name of a backend system that is responsible for FILE.
-The optional argument REGISTER means that a backend suitable for
-registration should be found.
-If REGISTER is nil, then if FILE is already registered, return the
+If FILE is already registered, return the
backend of FILE. If FILE is not registered, then the
first backend in `vc-handled-backends' that declares itself
-responsible for FILE is returned. If no backend declares itself
-responsible, return the first backend.
-
-If REGISTER is non-nil and FILE is a directory, create a VC
-repository that can be used to register FILE.
-
-If REGISTER is non-nil, return the first responsible backend under
-which FILE is not yet registered. If there is no such backend, return
-the first backend under which FILE is not yet registered, but could
-be registered."
- (when (not vc-handled-backends)
- (error "No handled backends"))
- (or (and (not (file-directory-p file)) (not register) (vc-backend file))
+responsible for FILE is returned."
+ (or (and (not (file-directory-p file)) (vc-backend file))
(catch 'found
;; First try: find a responsible backend. If this is for registration,
;; it must be a backend under which FILE is not yet registered.
(dolist (backend vc-handled-backends)
- (and (or (not register)
- (not (vc-call-backend backend 'registered file)))
- (vc-call-backend backend 'responsible-p file)
- (throw 'found backend)))
- ;; no responsible backend
- (if (not register)
- ;; if this is not for registration, the first backend must do
- (car vc-handled-backends)
- (if (file-directory-p file)
- (let* ((possible-backends
- (let (pos)
- (dolist (crt vc-handled-backends)
- (when (vc-find-backend-function crt 'create-repo)
- (push crt pos)))
- pos))
- (bk
- (intern
- ;; Read the VC backend from the user, only
- ;; complete with the backends that have the
- ;; 'create-repo method.
- (completing-read
- (format "%s is not in a version controlled directory.\nUse VC backend: " file)
- (mapcar 'symbol-name possible-backends) nil t)))
- (repo-dir
- (file-name-as-directory
- (let ((def-dir file))
- ;; read the directory where to create the
- ;; repository, make sure it's a parent of
- ;; file.
- (read-file-name
- (format "create %s repository in: " bk)
- default-directory nil t nil
- (lambda (arg)
- (and (file-directory-p arg)
- (vc-string-prefix-p (expand-file-name arg) def-dir))))))))
- (let ((default-directory repo-dir))
- (vc-call-backend bk 'create-repo))
- (throw 'found bk))
-
- ;; FIXME: this case does not happen with the current code.
- ;; Should we keep it?
- ;;
- ;; For registration, we need to find a new backend that
- ;; could register FILE.
- (dolist (backend vc-handled-backends)
- (and (not (vc-call-backend backend 'registered file))
- (vc-call-backend backend 'could-register file)
- (throw 'found backend))))
- (error "no backend that could register")))))
+ (and (vc-call-backend backend 'responsible-p file)
+ (throw 'found backend))))
+ (error "No VC backend is responsible for %s" file)))
(defun vc-expand-dirs (file-or-dir-list)
"Expands directories in a file list specification.
(cond
((derived-mode-p 'vc-dir-mode)
(vc-dir-deduce-fileset state-model-only-files))
+ ((derived-mode-p 'dired-mode)
+ (if observer
+ (vc-dired-deduce-fileset)
+ (error "State changing VC operations not supported in `dired-mode'")))
((setq backend (vc-backend buffer-file-name))
(if state-model-only-files
(list backend (list buffer-file-name)
(error "Buffer %s is not associated with a file" (buffer-name)))
((and allow-unregistered (not (vc-registered buffer-file-name)))
(if state-model-only-files
- (list (vc-responsible-backend
- (file-name-directory (buffer-file-name)) t)
+ (list (vc-backend-for-registration (buffer-file-name))
(list buffer-file-name)
(list buffer-file-name)
(when state-model-only-files 'unregistered)
nil)
- (list (vc-responsible-backend
- (file-name-directory (buffer-file-name)) t)
+ (list (vc-backend-for-registration (buffer-file-name))
(list buffer-file-name))))
(t (error "No fileset is available here")))))
+(defun vc-dired-deduce-fileset ()
+ (let ((backend (vc-responsible-backend default-directory)))
+ (unless backend (error "Directory not under VC"))
+ (list backend
+ (dired-map-over-marks (dired-get-filename nil t) nil))))
+
(defun vc-ensure-vc-buffer ()
"Make sure that the current buffer visits a version-controlled file."
(cond
;; (vc-call-backend ',(vc-backend f)
;; 'diff (list ',f) ',rev1 ',rev2))))))
+(defvar vc-coding-system-inherit-eol t
+ "When non-nil, inherit the EOL format for reading Diff output from the file.
+
+Used in `vc-coding-system-for-diff' to determine the EOL format to use
+for reading Diff output for a file. If non-nil, the EOL format is
+inherited from the file itself.
+Set this variable to nil if your Diff tool might use a different
+EOL. Then Emacs will auto-detect the EOL format in Diff output, which
+gives better results.") ;; Cf. bug#4451.
+
(defun vc-coding-system-for-diff (file)
"Return the coding system for reading diff output for FILE."
(or coding-system-for-read
;; use the buffer's coding system
(let ((buf (find-buffer-visiting file)))
(when buf (with-current-buffer buf
- buffer-file-coding-system)))
+ (if vc-coding-system-inherit-eol
+ buffer-file-coding-system
+ ;; Don't inherit the EOL part of the coding-system,
+ ;; because some Diff tools may choose to use
+ ;; a different one. bug#4451.
+ (coding-system-base buffer-file-coding-system)))))
;; otherwise, try to find one based on the file name
(car (find-operation-coding-system 'insert-file-contents file))
;; and a final fallback
;;;###autoload
(defun vc-root-diff (historic &optional not-urgent)
- "Display diffs between file revisions.
-Normally this compares the currently selected fileset with their
-working revisions. With a prefix argument HISTORIC, it reads two revision
+ "Display diffs between VC-controlled whole tree revisions.
+Normally, this compares the tree corresponding to the current
+fileset with the working revision.
+With a prefix argument HISTORIC, prompt for two revision
designators specifying which revisions to compare.
The optional argument NOT-URGENT non-nil means it is ok to say no to
(when buffer-file-name (vc-buffer-sync not-urgent))
(let ((backend
(cond ((derived-mode-p 'vc-dir-mode) vc-dir-backend)
+ ((derived-mode-p 'dired-mode) (vc-responsible-backend default-directory))
(vc-mode (vc-backend buffer-file-name))))
rootdir working-revision)
(unless backend
rev)))
(switch-to-buffer-other-window (vc-find-revision file revision))))
-(defun vc-find-revision (file revision)
- "Read REVISION of FILE into a buffer and return the buffer."
+(defun vc-find-revision (file revision &optional backend)
+ "Read REVISION of FILE into a buffer and return the buffer.
+Use BACKEND as the VC backend if specified."
(let ((automatic-backup (vc-version-backup-file-name file revision))
(filebuf (or (get-file-buffer file) (current-buffer)))
(filename (vc-version-backup-file-name file revision 'manual)))
;; Change buffer to get local value of
;; vc-checkout-switches.
(with-current-buffer filebuf
- (vc-call find-revision file revision outbuf))))
+ (if backend
+ (vc-call-backend backend 'find-revision file revision outbuf)
+ (vc-call find-revision file revision outbuf)))))
(setq failed nil))
(when (and failed (file-exists-p filename))
(delete-file filename))))
If it contains `file' then show short logs for files.
Not all VC backends support short logs!")
-(defun vc-print-log-internal (backend files working-revision)
+(defvar log-view-vc-backend)
+(defvar log-view-vc-fileset)
+
+(defun vc-print-log-internal (backend files working-revision
+ &optional is-start-revision limit)
;; Don't switch to the output buffer before running the command,
;; so that any buffer-local settings in the vc-controlled
;; buffer can be accessed by the command.
(let ((dir-present nil)
- (vc-short-log nil))
+ (vc-short-log nil)
+ pl-return)
(dolist (file files)
(when (file-directory-p file)
(setq dir-present t)))
(not (null (if dir-present
(memq 'directory vc-log-short-style)
(memq 'file vc-log-short-style)))))
- (vc-call-backend backend 'print-log files "*vc-change-log*" vc-short-log)
+
+ (setq pl-return (vc-call-backend
+ backend 'print-log files "*vc-change-log*"
+ vc-short-log (when is-start-revision working-revision) limit))
(pop-to-buffer "*vc-change-log*")
+ (let ((inhibit-read-only t))
+ ;; log-view-mode used to be called with inhibit-read-only bound
+ ;; to t, so let's keep doing it, just in case.
+ (vc-call-backend backend 'log-view-mode))
+ (set (make-local-variable 'log-view-vc-backend) backend)
+ (set (make-local-variable 'log-view-vc-fileset) files)
+
(vc-exec-after
- `(let ((inhibit-read-only t)
- (vc-short-log ,vc-short-log))
- (vc-call-backend ',backend 'log-view-mode)
- (set (make-local-variable 'log-view-vc-backend) ',backend)
- (set (make-local-variable 'log-view-vc-fileset) ',files)
+ `(let ((inhibit-read-only t))
+ (when (and ,limit (not ,(eq 'limit-unsupported pl-return))
+ (not ,is-start-revision))
+ (goto-char (point-max))
+ (widget-create 'push-button
+ :notify (lambda (&rest ignore)
+ (vc-print-log-internal
+ ',backend ',files ',working-revision nil (* 2 ,limit)))
+ :help-echo "Show the log again, and double the number of log entries shown"
+ "Show 2X entries")
+ (widget-insert " ")
+ (widget-create 'push-button
+ :notify (lambda (&rest ignore)
+ (vc-print-log-internal
+ ',backend ',files ',working-revision nil nil))
+ :help-echo "Show the log again, showing all entries"
+ "Show unlimited entries")
+ (widget-setup))
(shrink-window-if-larger-than-buffer)
;; move point to the log entry for the working revision
(set-buffer-modified-p nil)))))
;;;###autoload
-(defun vc-print-log (&optional working-revision)
+(defun vc-print-log (&optional working-revision limit)
"List the change log of the current fileset in a window.
-If WORKING-REVISION is non-nil, leave the point at that revision."
- (interactive)
+If WORKING-REVISION is non-nil, leave point at that revision.
+If LIMIT is non-nil, it should be a number specifying the maximum
+number of revisions to show; the default is `vc-log-show-limit'.
+
+When called interactively with a prefix argument, prompt for
+WORKING-REVISION and LIMIT."
+ (interactive
+ (cond
+ (current-prefix-arg
+ (let ((rev (read-from-minibuffer "Log from revision (default: last revision): " nil
+ nil nil nil))
+ (lim (string-to-number
+ (read-from-minibuffer
+ "Limit display (unlimited: 0): "
+ (format "%s" vc-log-show-limit)
+ nil nil nil))))
+ (when (string= rev "") (setq rev nil))
+ (when (<= lim 0) (setq lim nil))
+ (list rev lim)))
+ (t
+ (list nil (when (> vc-log-show-limit 0) vc-log-show-limit)))))
(let* ((vc-fileset (vc-deduce-fileset t)) ;FIXME: Why t? --Stef
(backend (car vc-fileset))
(files (cadr vc-fileset))
(working-revision (or working-revision (vc-working-revision (car files)))))
- (vc-print-log-internal backend files working-revision)))
+ (vc-print-log-internal backend files working-revision nil limit)))
;;;###autoload
-(defun vc-print-root-log ()
- "List the change log of for the current VC controlled tree in a window."
- (interactive)
+(defun vc-print-root-log (&optional limit)
+ "List the change log for the current VC controlled tree in a window.
+If LIMIT is non-nil, it should be a number specifying the maximum
+number of revisions to show; the default is `vc-log-show-limit'.
+When called interactively with a prefix argument, prompt for LIMIT."
+ (interactive
+ (cond
+ (current-prefix-arg
+ (let ((lim (string-to-number
+ (read-from-minibuffer
+ "Limit display (unlimited: 0): "
+ (format "%s" vc-log-show-limit)
+ nil nil nil))))
+ (when (<= lim 0) (setq lim nil))
+ (list lim)))
+ (t
+ (list (when (> vc-log-show-limit 0) vc-log-show-limit)))))
(let ((backend
(cond ((derived-mode-p 'vc-dir-mode) vc-dir-backend)
+ ((derived-mode-p 'dired-mode) (vc-responsible-backend default-directory))
(vc-mode (vc-backend buffer-file-name))))
rootdir working-revision)
(unless backend
(error "Buffer is not version controlled"))
(setq rootdir (vc-call-backend backend 'root default-directory))
(setq working-revision (vc-working-revision rootdir))
- (vc-print-log-internal backend (list rootdir) working-revision)))
+ (vc-print-log-internal backend (list rootdir) working-revision nil limit)))
;;;###autoload
(defun vc-revert ()
(when (vc-diff-internal vc-allow-async-revert vc-fileset nil nil)
(unless (yes-or-no-p
(format "Discard changes in %s? "
- (let ((str (vc-delistify files)))
+ (let ((str (vc-delistify files))
+ (nfiles (length files)))
(if (< (length str) 50)
str
- (format "%d files" (length files))))))
+ (format "%d file%s" nfiles
+ (if (= nfiles 1) "" "s"))))))
(error "Revert canceled"))
(delete-windows-on "*vc-diff*")
(kill-buffer "*vc-diff*"))