;; in Jan-Feb 1994.
;;
;; Supported version-control systems presently include SCCS, RCS, and CVS.
-;; The RCS lock-stealing code doesn't work right unless you use RCS 5.6.2
-;; or newer. Currently (January 1994) that is only a beta test release.
+;;
+;; Some features will not work with old RCS versions. Where
+;; appropriate, VC finds out which version you have, and allows or
+;; disallows those features (stealing locks, for example, works only
+;; from 5.6.2 onwards).
;; Even initial checkins will fail if your RCS version is so old that ci
;; doesn't understand -t-; this has been known to happen to people running
;; NExTSTEP 3.0.
(defvar vc-suppress-confirm nil
"*If non-nil, treat user as expert; suppress yes-no prompts on some things.")
(defvar vc-initial-comment nil
- "*Prompt for initial comment when a file is registered.")
+ "*If non-nil, prompt for initial comment when a file is registered.")
(defvar vc-command-messages nil
- "*Display run messages from back-end commands.")
+ "*If non-nil, display run messages from back-end commands.")
(defvar vc-checkin-switches nil
- "*Extra switches passed to the checkin program by \\[vc-checkin].")
+ "*A string or list of strings specifying extra switches passed
+to the checkin program by \\[vc-checkin].")
(defvar vc-checkout-switches nil
- "*Extra switches passed to the checkout program by \\[vc-checkout].")
+ "*A string or list of strings specifying extra switches passed
+to the checkout program by \\[vc-checkout].")
(defvar vc-directory-exclusion-list '("SCCS" "RCS" "CVS")
- "*Directory names ignored by functions that recursively walk file trees.")
+ "*A list of directory names ignored by functions that recursively
+walk file trees.")
(defconst vc-maximum-comment-ring-size 32
"Maximum number of saved comments in the comment ring.")
(defvar vc-header-alist
'((SCCS "\%W\%") (RCS "\$Id\$") (CVS "\$Id\$"))
- "*Header keywords to be inserted when `vc-insert-headers' is executed.")
+ "*Header keywords to be inserted by `vc-insert-headers'.
+Must be a list of two-element lists, the first element of each must
+be `RCS', `CVS', or `SCCS'. The second element is the string to
+be inserted for this particular backend.")
(defvar vc-static-header-alist
'(("\\.c$" .
"\n#ifndef lint\nstatic char vcid[] = \"\%s\";\n#endif /* lint */\n"))
Verify that the file really is not locked
and that its contents match what the master file says.")
+(defvar vc-rcs-release nil
+ "*The release number of your RCS installation, as a string.
+If nil, VC itself computes this value when it is first needed.")
+
+(defvar vc-sccs-release nil
+ "*The release number of your SCCS installation, as a string.
+If nil, VC itself computes this value when it is first needed.")
+
+(defvar vc-cvs-release nil
+ "*The release number of your CVS installation, as a string.
+If nil, VC itself computes this value when it is first needed.")
+
;; Variables the user doesn't need to know about.
(defvar vc-log-entry-mode nil)
(defvar vc-log-operation nil)
(if (not (fboundp 'file-regular-p))
(fset 'file-regular-p 'file-regular-p-18))
+;;; Find and compare backend releases
+
+(defun vc-backend-release (backend)
+ ;; Returns which backend release is installed on this system.
+ (cond
+ ((eq backend 'RCS)
+ (or vc-rcs-release
+ (and (zerop (vc-do-command nil 2 "rcs" nil nil "-V"))
+ (save-excursion
+ (set-buffer (get-buffer "*vc*"))
+ (setq vc-rcs-release
+ (car (vc-parse-buffer
+ '(("^RCS version \\([0-9.]+ *.*\\)" 1)))))))
+ (setq vc-rcs-release 'unknown)))
+ ((eq backend 'CVS)
+ (or vc-cvs-release
+ (and (zerop (vc-do-command nil 1 "cvs" nil nil "-v"))
+ (save-excursion
+ (set-buffer (get-buffer "*vc*"))
+ (setq vc-cvs-release
+ (car (vc-parse-buffer
+ '(("^Concurrent Versions System (CVS) \\([0-9.]+\\)"
+ 1)))))))
+ (setq vc-cvs-release 'unknown)))
+ ((eq backend 'SCCS)
+ vc-sccs-release)))
+
+(defun vc-release-greater-or-equal (r1 r2)
+ ;; Compare release numbers, represented as strings.
+ ;; Release components are assumed cardinal numbers, not decimal
+ ;; fractions (5.10 is a higher release than 5.9). Omitted fields
+ ;; are considered lower (5.6.7 is earlier than 5.6.7.1).
+ ;; Comparison runs till the end of the string is found, or a
+ ;; non-numeric component shows up (5.6.7 is earlier than "5.6.7 beta",
+ ;; which is probably not what you want in some cases).
+ ;; This code is suitable for existing RCS release numbers.
+ ;; CVS releases are handled reasonably, too (1.3 < 1.4* < 1.5).
+ (let (v1 v2 i1 i2)
+ (catch 'done
+ (or (and (string-match "^\\.?\\([0-9]+\\)" r1)
+ (setq i1 (match-end 0))
+ (setq v1 (string-to-number (match-string 1 r1)))
+ (or (and (string-match "^\\.?\\([0-9]+\\)" r2)
+ (setq i2 (match-end 0))
+ (setq v2 (string-to-number (match-string 1 r2)))
+ (if (> v1 v2) (throw 'done t)
+ (if (< v1 v2) (throw 'done nil)
+ (throw 'done
+ (vc-release-greater-or-equal
+ (substring r1 i1)
+ (substring r2 i2)))))))
+ (throw 'done t)))
+ (or (and (string-match "^\\.?\\([0-9]+\\)" r2)
+ (throw 'done nil))
+ (throw 'done t)))))
+
+(defun vc-backend-release-p (backend release)
+ ;; Return t if we have RELEASE of BACKEND or better
+ (let (i r (ri 0) (ii 0) is rs (installation (vc-backend-release backend)))
+ (if (not (eq installation 'unknown))
+ (cond
+ ((or (eq backend 'RCS) (eq backend 'CVS))
+ (vc-release-greater-or-equal installation release))))))
+
;;; functions that operate on RCS revision numbers
(defun vc-trunk-p (rev)
(progn ;; RCS
(vc-file-setprop file 'vc-default-branch nil)
(vc-file-setprop file 'vc-head-version nil)
- (vc-file-setprop file 'vc-master-workfile--version nil)
+ (vc-file-setprop file 'vc-master-workfile-version nil)
(vc-file-setprop file 'vc-master-locks nil))
(progn
(vc-file-setprop file 'vc-cvs-status nil))))
(kill-buffer (get-buffer "*vc-info*")))
(string= tip-version workfile-version))))
;; CVS
- (or (string= (vc-workfile-version file) "0") ;; added but not committed.
- (string= (vc-workfile-version file) (vc-latest-version file)))))
+ t))
(defun vc-registration-error (file)
(if file
The last argument of the command is the master name of FILE if LAST is
`MASTER', or the workfile of FILE if LAST is `WORKFILE'; this is appended
to an optional list of FLAGS."
- (setq file (expand-file-name file))
+ (and file (setq file (expand-file-name file)))
(if (not buffer) (setq buffer "*vc*"))
(if vc-command-messages
(message "Running %s on %s..." command file))
(interactive "P")
(widen)
(let ((context (vc-buffer-context)))
- (revert-buffer arg no-confirm)
+ ;; t means don't call normal-mode; that's to preserve various minor modes.
+ (revert-buffer arg no-confirm t)
(vc-restore-buffer-context context)))
;;; If comment is specified, it will be used as an admin or checkin comment.
(let ((vc-file (vc-name file))
(vc-type (vc-backend file))
- owner version)
+ owner version buffer)
(cond
;; if there is no master file corresponding, create one
((and (eq vc-type 'CVS)
(or (eq (vc-cvs-status file) 'needs-checkout)
(eq (vc-cvs-status file) 'needs-merge)))
- (vc-buffer-sync)
- (if (yes-or-no-p (format "%s is not up-to-date. Merge in changes now? "
- (buffer-name)))
+ (if (or vc-dired-mode
+ (yes-or-no-p
+ (format "%s is not up-to-date. Merge in changes now? "
+ (buffer-name))))
(progn
- (if (and (buffer-modified-p)
+ (if vc-dired-mode
+ (and (setq buffer (get-file-buffer file))
+ (buffer-modified-p buffer)
+ (switch-to-buffer-other-window buffer)
+ (vc-buffer-sync t))
+ (setq buffer (current-buffer))
+ (vc-buffer-sync t))
+ (if (and buffer (buffer-modified-p buffer)
(not (yes-or-no-p
- "Buffer %s modified; merge file on disc anyhow? "
- (buffer-name))))
+ (format
+ "Buffer %s modified; merge file on disc anyhow? "
+ (buffer-name buffer)))))
(error "Merge aborted"))
(if (not (zerop (vc-backend-merge-news file)))
;; Overlaps detected - what now? Should use some
;; emerge, but for now, simply warn the user with a
;; message.
(message "Conflicts detected!"))
- (vc-resynch-window file t (not (buffer-modified-p))))
+ (and buffer
+ (vc-resynch-buffer file t (not (buffer-modified-p buffer)))))
(error "%s needs update" (buffer-name))))
;; if there is no lock on the file, assert one and get it
(progn (vc-backend-steal file)
(vc-mode-line file))
(if (not (yes-or-no-p "Revert to checked-in version, instead? "))
- (error "Checkout aborted.")
+ (error "Checkout aborted")
(vc-revert-buffer1 t t)
(vc-checkout-writable-buffer file))
)
(if (not (eq vc-type 'SCCS))
(vc-checkout file nil
(read-string "Branch or version to move to: "))
- (error "Sorry, this is not implemented for SCCS."))
+ (error "Sorry, this is not implemented for SCCS"))
(if (vc-latest-on-branch-p file)
(vc-checkout-writable-buffer file)
(if (yes-or-no-p
(vc-checkout-writable-buffer file)
(if (yes-or-no-p "Lock the latest version instead? ")
(vc-checkout-writable-buffer file
- (vc-branch-part (vc-workfile-version file))))))
+ (if (vc-trunk-p (vc-workfile-version file))
+ "" ;; this means check out latest on trunk
+ (vc-branch-part (vc-workfile-version file)))))))
)))
;; a checked-out version exists, but the user may not own the lock
(not (string-equal owner (user-login-name))))
(if comment
(error "Sorry, you can't steal the lock on %s this way" file))
+ (and (eq vc-type 'RCS)
+ (not (vc-backend-release-p 'RCS "5.6.2"))
+ (error "File is locked by %s" owner))
(vc-steal-lock
file
(if verbose (read-string "Version to steal: ")
;; OK, user owns the lock on the file
(t
- (find-file file)
+ (if vc-dired-mode
+ (find-file-other-window file)
+ (find-file file))
;; give luser a chance to save before checking in.
(vc-buffer-sync)
)))))
(defun vc-next-action-dired (file rev comment)
- ;; We've accepted a log comment, now do a vc-next-action using it on all
- ;; marked files.
- (let ((configuration (current-window-configuration)))
+ ;; Do a vc-next-action-on-file on all the marked files, possibly
+ ;; passing on the log comment we've just entered.
+ (let ((configuration (current-window-configuration))
+ (dired-buffer (current-buffer))
+ (dired-dir default-directory))
(dired-map-over-marks
- (save-window-excursion
- (let ((file (dired-get-filename)))
- (message "Processing %s..." file)
- (vc-next-action-on-file file nil comment)
- (message "Processing %s...done" file)))
- nil t)
- (set-window-configuration configuration))
- )
+ (let ((file (dired-get-filename)) p)
+ (message "Processing %s..." file)
+ ;; Adjust the default directory so that checkouts
+ ;; go to the right place.
+ (setq default-directory (file-name-directory file))
+ (vc-next-action-on-file file nil comment)
+ (set-buffer dired-buffer)
+ (setq default-directory dired-dir)
+ (vc-dired-update-line file)
+ (set-window-configuration configuration)
+ (message "Processing %s...done" file))
+ nil t)))
;; Here's the major entry point.
(catch 'nogo
(if vc-dired-mode
(let ((files (dired-get-marked-files)))
- (if (= (length files) 1)
- (find-file-other-window (car files))
- (vc-start-entry nil nil nil
- "Enter a change comment for the marked files."
- 'vc-next-action-dired)
- (throw 'nogo nil))))
+ (if (string= ""
+ (mapconcat
+ (function (lambda (f)
+ (if (eq (vc-backend f) 'CVS)
+ (if (or (eq (vc-cvs-status f) 'locally-modified)
+ (eq (vc-cvs-status f) 'locally-added))
+ "@" "")
+ (if (vc-locking-user f) "@" ""))))
+ files ""))
+ (vc-next-action-dired nil nil "dummy")
+ (vc-start-entry nil nil nil
+ "Enter a change comment for the marked files."
+ 'vc-next-action-dired))
+ (throw 'nogo nil)))
(while vc-parent-buffer
(pop-to-buffer vc-parent-buffer))
(if buffer-file-name
(kill-buffer (current-buffer)))))
(defun vc-resynch-buffer (file &optional keep noquery)
- ;; if FILE is currently visited, resynch it's buffer
+ ;; if FILE is currently visited, resynch its buffer
(let ((buffer (get-file-buffer file)))
(if buffer
(save-excursion
(if (and (string-match "^/[^/:]+:" file) (vc-find-binary "ftp"))
(error "Sorry, you can't check out files over FTP"))
(vc-backend-checkout file writable rev)
- (if (string-equal file buffer-file-name)
- (vc-resynch-window file t t))
- )
+ (vc-resynch-buffer file t t))
(defun vc-steal-lock (file rev &optional owner)
"Steal the lock on the current workfile."
(vc-buffer-sync not-urgent)
(setq unchanged (vc-workfile-unchanged-p buffer-file-name))
(if unchanged
- (message "No changes to %s since latest version." file)
+ (message "No changes to %s since latest version" file)
(vc-backend-diff file)
;; Ideally, we'd like at this point to parse the diff so that
;; the buffer effectively goes into compilation mode and we
;; problem is that the `old' file doesn't exist to be
;; visited. This plays hell with numerous assumptions in
;; the diff.el and compile.el machinery.
- (pop-to-buffer "*vc-diff*")
+ (set-buffer "*vc-diff*")
(setq default-directory (file-name-directory file))
(if (= 0 (buffer-size))
(progn
(setq unchanged t)
- (message "No changes to %s since latest version." file))
+ (message "No changes to %s since latest version" file))
+ (pop-to-buffer "*vc-diff*")
(goto-char (point-min))
(shrink-window-if-larger-than-buffer)))
(not unchanged))))
(set-buffer (get-buffer-create "*vc-diff*"))
(cd file)
(vc-file-tree-walk
+ default-directory
(function (lambda (f)
(message "Looking at %s" f)
(and
(replace-match "$\\1$"))
(vc-restore-buffer-context context)))
-;; The VC directory submode. Coopt Dired for this.
+;; The VC directory major mode. Coopt Dired for this.
;; All VC commands get mapped into logical equivalents.
-(defvar vc-dired-prefix-map (make-sparse-keymap))
-(define-key vc-dired-prefix-map "\C-xv" vc-prefix-map)
-
-(or (not (boundp 'minor-mode-map-alist))
- (assq 'vc-dired-mode minor-mode-map-alist)
- (setq minor-mode-map-alist
- (cons (cons 'vc-dired-mode vc-dired-prefix-map)
- minor-mode-map-alist)))
-
-(defun vc-dired-mode ()
- "The augmented Dired minor mode used in VC directory buffers.
+(define-derived-mode vc-dired-mode dired-mode "Dired under VC"
+ "The major mode used in VC directory buffers. It is derived from Dired.
All Dired commands operate normally. Users currently locking listed files
are listed in place of the file's owner and group.
Keystrokes bound to VC commands will execute as though they had been called
on a buffer attached to the file named in the current Dired buffer line."
- (setq vc-dired-mode t)
- (setq vc-mode " under VC"))
+ (setq vc-dired-mode t))
+
+(define-key vc-dired-mode-map "\C-xv" vc-prefix-map)
+(define-key vc-dired-mode-map "g" 'vc-dired-update)
+(define-key vc-dired-mode-map "=" 'vc-diff)
+
+(defun vc-dired-state-info (file)
+ ;; Return the string that indicates the version control status
+ ;; on a VC dired line.
+ (let ((cvs-state (and (eq (vc-backend file) 'CVS)
+ (vc-cvs-status file))))
+ (if cvs-state
+ (cond ((eq cvs-state 'up-to-date) nil)
+ ((eq cvs-state 'needs-checkout) "patch")
+ ((eq cvs-state 'locally-modified) "modified")
+ ((eq cvs-state 'needs-merge) "merge")
+ ((eq cvs-state 'unresolved-conflict) "conflict")
+ ((eq cvs-state 'locally-added) "added"))
+ (vc-locking-user file))))
(defun vc-dired-reformat-line (x)
;; Hack a directory-listing line, plugging in locking-user info in
;; (insert (concat x "\t")))
;;
;; This code, like dired, assumes UNIX -l format.
- (forward-word 1) ;; skip over any extra field due to -ibs options
- (cond
- ;; This hack is used by the CVS code. See vc-locking-user.
- ((numberp x)
+ (let ((pos (point)) limit perm owner date-and-file)
+ (end-of-line)
+ (setq limit (point))
+ (goto-char pos)
(cond
- ((re-search-forward "\\([0-9]+ \\)\\([^ ]+\\)\\( .*\\)" nil 0)
- (save-excursion
- (goto-char (match-beginning 2))
- (insert "(")
- (goto-char (1+ (match-end 2)))
- (insert ")")
- (delete-char (- 17 (- (match-end 2) (match-beginning 2))))
- (insert (substring " " 0
- (- 7 (- (match-end 2) (match-beginning 2)))))))))
- (t
+ ((or
+ (re-search-forward ;; owner and group
+"\\([drwxlts-]+ \\) *[0-9]+ \\([^ ]+\\) +[^ ]+ +[0-9]+\\( [^ 0-9]+ [0-9 ][0-9] .*\\)"
+ limit t)
+ (re-search-forward ;; only owner displayed
+"\\([drwxlts-]+ \\) *[0-9]+ \\([^ ]+\\) +[0-9]+\\( [^ 0-9]+ [0-9 ][0-9] .*\\)"
+ limit t))
+ (setq perm (match-string 1)
+ owner (match-string 2)
+ date-and-file (match-string 3)))
+ ((re-search-forward ;; OS/2 -l format, no links, owner, group
+"\\([drwxlts-]+ \\) *[0-9]+\\( [^ 0-9]+ [0-9 ][0-9] .*\\)"
+ limit t)
+ (setq perm (match-string 1)
+ date-and-file (match-string 2))))
+ (if (numberp x) (setq x (or owner (number-to-string x))))
(if x (setq x (concat "(" x ")")))
- (if (re-search-forward "\\([0-9]+ \\).................\\( .*\\)" nil 0)
- (let ((rep (substring (concat x " ") 0 10)))
- (replace-match (concat "\\1" rep "\\2") t)))
- )))
+ (let ((rep (substring (concat x " ") 0 10)))
+ (replace-match (concat perm rep date-and-file)))))
+
+(defun vc-dired-update-line (file)
+ ;; Update the vc-dired listing line of file -- it is assumed
+ ;; that point is already on this line. Don't use dired-do-redisplay
+ ;; for this, because it cannot handle the way vc-dired deals with
+ ;; subdirectories.
+ (beginning-of-line)
+ (forward-char 2)
+ (let ((start (point)))
+ (forward-line 1)
+ (beginning-of-line)
+ (delete-region start (point))
+ (insert-directory file dired-listing-switches)
+ (forward-line -1)
+ (end-of-line)
+ (delete-char (- (length file)))
+ (insert (substring file (length (expand-file-name default-directory))))
+ (goto-char start))
+ (vc-dired-reformat-line (vc-dired-state-info file)))
+
+(defun vc-dired-update (verbose)
+ (interactive "P")
+ (vc-directory default-directory verbose))
;;; Note in Emacs 18 the following defun gets overridden
;;; with the symbol 'vc-directory-18. See below.
;;;###autoload
-(defun vc-directory (verbose)
+(defun vc-directory (dirname verbose)
"Show version-control status of the current directory and subdirectories.
Normally it creates a Dired buffer that lists only the locked files
in all these directories. With a prefix argument, it lists all files."
- (interactive "P")
+ (interactive "DDired under VC (directory): \nP")
+ (require 'dired)
+ (setq dirname (expand-file-name dirname))
+ ;; force a trailing slash
+ (if (not (eq (elt dirname (1- (length dirname))) ?/))
+ (setq dirname (concat dirname "/")))
(let (nonempty
- (dl (length (expand-file-name default-directory)))
- (filelist nil) (userlist nil)
+ (dl (length dirname))
+ (filelist nil) (statelist nil)
+ (old-dir default-directory)
dired-buf
dired-buf-mod-count)
(vc-file-tree-walk
- (function (lambda (f)
- (if (vc-registered f)
- (let ((user (vc-locking-user f)))
- (and (or verbose user)
- (setq filelist (cons (substring f dl) filelist))
- (setq userlist (cons user userlist))))))))
- (save-excursion
- ;; This uses a semi-documented feature of dired; giving a switch
- ;; argument forces the buffer to refresh each time.
- (dired
- (cons default-directory (nreverse filelist))
- dired-listing-switches)
- (setq dired-buf (current-buffer))
- (setq nonempty (not (zerop (buffer-size)))))
+ dirname
+ (function
+ (lambda (f)
+ (if (vc-registered f)
+ (let ((state (vc-dired-state-info f)))
+ (and (or verbose state)
+ (setq filelist (cons (substring f dl) filelist))
+ (setq statelist (cons state statelist))))))))
+ (save-window-excursion
+ (save-excursion
+ ;; This uses a semi-documented feature of dired; giving a switch
+ ;; argument forces the buffer to refresh each time.
+ (setq dired-buf
+ (dired-internal-noselect
+ (cons dirname (nreverse filelist))
+ dired-listing-switches 'vc-dired-mode))
+ (setq nonempty (not (eq 0 (length filelist))))))
+ (switch-to-buffer dired-buf)
+ ;; Make a few modifications to the header
+ (setq buffer-read-only nil)
+ (goto-char (point-min))
+ (forward-line 1) ;; Skip header line
+ (let ((start (point))) ;; Erase (but don't remove) the
+ (end-of-line) ;; "wildcard" line.
+ (delete-region start (point)))
+ (beginning-of-line)
(if nonempty
(progn
- (pop-to-buffer dired-buf)
- (vc-dired-mode)
- (goto-char (point-min))
- (setq buffer-read-only nil)
- (forward-line 1) ;; Skip header line
+ ;; Plug the version information into the individual lines
(mapcar
(function
(lambda (x)
(forward-char 2) ;; skip dired's mark area
(vc-dired-reformat-line x)
(forward-line 1))) ;; go to next line
- (nreverse userlist))
+ (nreverse statelist))
(setq buffer-read-only t)
(goto-char (point-min))
+ (dired-next-line 2)
)
+ (dired-next-line 1)
+ (insert " ")
+ (setq buffer-read-only t)
(message "No files are currently %s under %s"
- (if verbose "registered" "locked") default-directory))
+ (if verbose "registered" "locked") dirname))
))
;; Emacs 18 version
(erase-buffer)
(cd dir)
(vc-file-tree-walk
+ default-directory
(function (lambda (f)
(if (vc-registered f)
(let ((user (vc-locking-user f)))
"%s %s\n"
(concat user) f))))))))
(setq nonempty (not (zerop (buffer-size)))))
+
(if nonempty
(progn
(pop-to-buffer "*vc-status*" t)
(let ((status nil))
(catch 'vc-locked-example
(vc-file-tree-walk
+ default-directory
(function (lambda (f)
(and (vc-registered f)
(if (vc-locking-user f) (throw 'vc-locked-example f)
(if (stringp result)
(error "File %s is locked" result)
(vc-file-tree-walk
+ default-directory
(function (lambda (f) (and
(vc-name f)
(vc-backend-assign-name f name)))))
(if (eq result 'visited)
(setq update (yes-or-no-p "Update the affected buffers? ")))
(vc-file-tree-walk
+ default-directory
(function (lambda (f) (and
(vc-name f)
(vc-error-occurred
(while vc-parent-buffer
(pop-to-buffer vc-parent-buffer))
(let ((file buffer-file-name)
+ ;; This operation should always ask for confirmation.
+ (vc-suppress-confirm nil)
(obuf (current-buffer)) (changed (vc-diff nil t)))
- (if (and changed (or vc-suppress-confirm
- (not (yes-or-no-p "Discard changes? "))))
+ (if (and changed (not (yes-or-no-p "Discard changes? ")))
(progn
(if (and (window-dedicated-p (selected-window))
(one-window-p t 'selected-frame))
(while vc-parent-buffer
(pop-to-buffer vc-parent-buffer))
(cond
- ((eq (vc-backend (buffer-file-name)) 'CVS)
+ ((not (vc-registered (buffer-file-name)))
+ (vc-registration-error (buffer-file-name))
+ (eq (vc-backend (buffer-file-name)) 'CVS)
(error "Unchecking files under CVS is dangerous and not supported in VC"))
((vc-locking-user (buffer-file-name))
- (error "This version is locked. Use vc-revert-buffer to discard changes."))
+ (error "This version is locked; use vc-revert-buffer to discard changes"))
((not (vc-latest-on-branch-p (buffer-file-name)))
- (error "This is not the latest version. VC cannot cancel it.")))
- (let ((target (vc-workfile-version (buffer-file-name))))
- (if (null (yes-or-no-p "Remove this version from master? "))
+ (error "This is not the latest version--VC cannot cancel it")))
+ (let* ((target (vc-workfile-version (buffer-file-name)))
+ (recent (if (vc-trunk-p target) "" (vc-branch-part target)))
+ (config (current-window-configuration)) done)
+ (if (null (yes-or-no-p (format "Remove version %s from master? " target)))
nil
(setq norevert (or norevert (not
(yes-or-no-p "Revert buffer to most recent remaining version? "))))
(vc-backend-uncheck (buffer-file-name) target)
- (if (not norevert)
- (vc-checkout (buffer-file-name) nil)
- ;; If norevert, lock the most recent remaining version,
- ;; and mark the buffer modified.
- (if (eq (vc-backend (buffer-file-name)) 'RCS)
- (progn (setq buffer-read-only nil)
- (vc-clear-headers)))
- (vc-backend-checkout (buffer-file-name) t (vc-branch-part target))
- (set-visited-file-name (buffer-file-name))
- (vc-mode-line (buffer-file-name)))
- (message "Version %s has been removed from the master." target)
+ ;; Check out the most recent remaining version. If it fails, because
+ ;; the whole branch got deleted, do a double-take and check out the
+ ;; version where the branch started.
+ (while (not done)
+ (condition-case err
+ (progn
+ (if norevert
+ ;; Check out locked, but only to disc, and keep
+ ;; modifications in the buffer.
+ (vc-backend-checkout (buffer-file-name) t recent)
+ ;; Check out unlocked, and revert buffer.
+ (vc-checkout (buffer-file-name) nil recent))
+ (setq done t))
+ (error (set-buffer "*vc*")
+ (goto-char (point-min))
+ (if (re-search-forward "no side branches present for" nil t)
+ (progn (setq recent (vc-branch-part recent))
+ (set-window-configuration config))
+ ;; No, it was some other error: re-signal it.
+ (signal (car err) (cdr err))))))
+ ;; If norevert, clear version headers and mark the buffer modified.
+ (if norevert
+ (progn
+ (set-visited-file-name (buffer-file-name))
+ (if (not vc-make-backup-files)
+ ;; inhibit backup for this buffer
+ (progn (make-local-variable 'backup-inhibited)
+ (setq backup-inhibited t)))
+ (if (eq (vc-backend (buffer-file-name)) 'RCS)
+ (progn (setq buffer-read-only nil)
+ (vc-clear-headers)))
+ (vc-mode-line (buffer-file-name))))
+ (message "Version %s has been removed from the master" target)
)))
;;;###autoload
;; implemented things might change for the better. This is unlikely to occur
;; until CVS 2.0 is released. --ceder 1994-01-23 21:27:51
(if (eq (vc-backend old) 'CVS)
- (error "Renaming files under CVS is dangerous and not supported in VC."))
+ (error "Renaming files under CVS is dangerous and not supported in VC"))
(let ((oldbuf (get-file-buffer old)))
(if (and oldbuf (buffer-modified-p oldbuf))
(error "Please save files before moving them"))
(vc-do-command nil 0 "get" file 'MASTER)))
((eq backend 'RCS)
(vc-do-command nil 0 "ci" file 'MASTER ;; RCS
+ ;; if available, use the secure registering option
+ (and (vc-backend-release-p 'RCS "5.6.4") "-i")
(concat (if vc-keep-workfiles "-u" "-r") rev)
(and comment (concat "-t-" comment))
file))
;; Retrieve a copy of a saved version into a workfile
(let ((filename (or workfile file))
(file-buffer (get-file-buffer file))
- (old-default-dir default-directory))
+ (old-default-dir default-directory)
+ switches)
(message "Checking out %s..." filename)
(save-excursion
- ;; Change buffers to get local value of vc-checkin-switches.
+ ;; Change buffers to get local value of vc-checkout-switches.
(if file-buffer (set-buffer file-buffer))
+ (setq switches (if (stringp vc-checkout-switches)
+ (list vc-checkout-switches)
+ vc-checkout-switches))
;; Adjust the default-directory so that the check-out creates
;; the file in the right place. The old value is restored below.
(setq default-directory (file-name-directory filename))
(vc-backend-dispatch file
- (if workfile;; SCCS
- ;; Some SCCS implementations allow checking out directly to a
- ;; file using the -G option, but then some don't so use the
- ;; least common denominator approach and use the -p option
- ;; ala RCS.
- (let ((vc-modes (logior (file-modes (vc-name file))
- (if writable 128 0)))
- (failed t))
- (unwind-protect
- (progn
- (apply 'vc-do-command
- nil 0 "/bin/sh" file 'MASTER "-c"
- ;; Some shells make the "" dummy argument into $0
- ;; while others use the shell's name as $0 and
- ;; use the "" as $1. The if-statement
- ;; converts the latter case to the former.
- (format "if [ x\"$1\" = x ]; then shift; fi; \
+ (progn ;; SCCS
+ (and rev (string= rev "") (setq rev nil))
+ (if workfile
+ ;; Some SCCS implementations allow checking out directly to a
+ ;; file using the -G option, but then some don't so use the
+ ;; least common denominator approach and use the -p option
+ ;; ala RCS.
+ (let ((vc-modes (logior (file-modes (vc-name file))
+ (if writable 128 0)))
+ (failed t))
+ (unwind-protect
+ (progn
+ (apply 'vc-do-command
+ nil 0 "/bin/sh" file 'MASTER "-c"
+ ;; Some shells make the "" dummy argument into $0
+ ;; while others use the shell's name as $0 and
+ ;; use the "" as $1. The if-statement
+ ;; converts the latter case to the former.
+ (format "if [ x\"$1\" = x ]; then shift; fi; \
umask %o; exec >\"$1\" || exit; \
shift; umask %o; exec get \"$@\""
(logand 511 (lognot vc-modes))
(logand 511 (lognot (default-file-modes))))
- "" ; dummy argument for shell's $0
- filename
- (if writable "-e")
- "-p" (and rev
- (concat "-r" (vc-lookup-triple file rev)))
- vc-checkout-switches)
- (setq failed nil))
- (and failed (file-exists-p filename) (delete-file filename))))
- (apply 'vc-do-command nil 0 "get" file 'MASTER ;; SCCS
- (if writable "-e")
- (and rev (concat "-r" (vc-lookup-triple file rev)))
- vc-checkout-switches)
- (vc-file-setprop file 'vc-workfile-version nil))
- (if workfile ;; RCS
+ "" ; dummy argument for shell's $0
+ filename
+ (if writable "-e")
+ "-p"
+ (and rev
+ (concat "-r" (vc-lookup-triple file rev)))
+ switches)
+ (setq failed nil))
+ (and failed (file-exists-p filename)
+ (delete-file filename))))
+ (apply 'vc-do-command nil 0 "get" file 'MASTER ;; SCCS
+ (if writable "-e")
+ (and rev (concat "-r" (vc-lookup-triple file rev)))
+ switches)
+ (vc-file-setprop file 'vc-workfile-version nil)))
+ (if workfile ;; RCS
;; RCS doesn't let us check out into arbitrary file names directly.
;; Use `co -p' and make stdout point to the correct file.
(let ((vc-modes (logior (file-modes (vc-name file))
filename
(if writable "-l")
(concat "-p" rev)
- vc-checkout-switches)
+ switches)
(setq failed nil))
(and failed (file-exists-p filename) (delete-file filename))))
- (let (new-version)
- ;; if we should go to the head of the trunk,
- ;; clear the default branch first
- (and rev (string= rev "")
- (vc-do-command nil 0 "rcs" file 'MASTER "-b"))
- ;; now do the checkout
- (apply 'vc-do-command
- nil 0 "co" file 'MASTER
- ;; If locking is not strict, force to overwrite
- ;; the writable workfile.
- (if (eq (vc-checkout-model file) 'implicit) "-f")
- (if writable "-l")
- (if rev (concat "-r" rev)
- ;; if no explicit revision was specified,
- ;; check out that of the working file
- (let ((workrev (vc-workfile-version file)))
- (if workrev (concat "-r" workrev)
- nil)))
- vc-checkout-switches)
- ;; determine the new workfile version
- (save-excursion
- (set-buffer "*vc*")
- (goto-char (point-min))
- (setq new-version
- (if (re-search-forward "^revision \\([0-9.]+\\).*\n" nil t)
- (buffer-substring (match-beginning 1) (match-end 1)))))
- (vc-file-setprop file 'vc-workfile-version new-version)
- ;; if necessary, adjust the default branch
- (and rev (not (string= rev ""))
- (vc-do-command nil 0 "rcs" file 'MASTER
- (concat "-b" (if (vc-latest-on-branch-p file)
- (if (vc-trunk-p new-version) nil
- (vc-branch-part new-version))
- new-version))))))
+ (let (new-version)
+ ;; if we should go to the head of the trunk,
+ ;; clear the default branch first
+ (and rev (string= rev "")
+ (vc-do-command nil 0 "rcs" file 'MASTER "-b"))
+ ;; now do the checkout
+ (apply 'vc-do-command
+ nil 0 "co" file 'MASTER
+ ;; If locking is not strict, force to overwrite
+ ;; the writable workfile.
+ (if (eq (vc-checkout-model file) 'implicit) "-f")
+ (if writable "-l")
+ (if rev (concat "-r" rev)
+ ;; if no explicit revision was specified,
+ ;; check out that of the working file
+ (let ((workrev (vc-workfile-version file)))
+ (if workrev (concat "-r" workrev)
+ nil)))
+ switches)
+ ;; determine the new workfile version
+ (save-excursion
+ (set-buffer "*vc*")
+ (goto-char (point-min))
+ (setq new-version
+ (if (re-search-forward "^revision \\([0-9.]+\\).*\n" nil t)
+ (buffer-substring (match-beginning 1) (match-end 1)))))
+ (vc-file-setprop file 'vc-workfile-version new-version)
+ ;; if necessary, adjust the default branch
+ (and rev (not (string= rev ""))
+ (vc-do-command nil 0 "rcs" file 'MASTER
+ (concat "-b" (if (vc-latest-on-branch-p file)
+ (if (vc-trunk-p new-version) nil
+ (vc-branch-part new-version))
+ new-version))))))
(if workfile ;; CVS
;; CVS is much like RCS
(let ((failed t))
workfile
(concat "-r" rev)
"-p"
- vc-checkout-switches)
+ switches)
(setq failed nil))
(and failed (file-exists-p filename) (delete-file filename))))
;; default for verbose checkout: clear the sticky tag
- ;; so that the actual update will go to the head of the trunk
+ ;; so that the actual update will get the head of the trunk
(and rev (string= rev "")
(vc-do-command nil 0 "cvs" file 'WORKFILE "update" "-A"))
;; If a revision was specified, check that out.
"update"
(and rev (not (string= rev ""))
(concat "-r" rev))
- vc-checkout-switches)
+ switches)
;; If no revision was specified, simply make the file writable.
(and writable
(or (eq (vc-checkout-model file) 'manual)
(save-excursion
;; Change buffers to get local value of vc-checkin-switches.
(set-buffer (or (get-file-buffer file) (current-buffer)))
- ;; Clear the master-properties. Do that here, not at the
- ;; end, because if the check-in fails we want them to get
- ;; re-computed before the next try.
- (vc-file-clear-masterprops file)
- (vc-backend-dispatch file
- ;; SCCS
- (progn
- (apply 'vc-do-command nil 0 "delta" file 'MASTER
- (if rev (concat "-r" rev))
- (concat "-y" comment)
- vc-checkin-switches)
- (vc-file-setprop file 'vc-locking-user 'none)
- (vc-file-setprop file 'vc-workfile-version nil)
- (if vc-keep-workfiles
- (vc-do-command nil 0 "get" file 'MASTER))
- )
- ;; RCS
- (let ((old-version (vc-workfile-version file)) new-version)
- (apply 'vc-do-command nil 0 "ci" file 'MASTER
- (concat (if vc-keep-workfiles "-u" "-r") rev)
- (concat "-m" comment)
- vc-checkin-switches)
- (vc-file-setprop file 'vc-locking-user 'none)
- (vc-file-setprop file 'vc-workfile-version nil)
-
- ;; determine the new workfile version
- (set-buffer "*vc*")
- (goto-char (point-min))
- (if (or (re-search-forward
- "new revision: \\([0-9.]+\\);" nil t)
- (re-search-forward
- "reverting to previous revision \\([0-9.]+\\)" nil t))
- (progn (setq new-version (buffer-substring (match-beginning 1)
- (match-end 1)))
- (vc-file-setprop file 'vc-workfile-version new-version)))
-
- ;; if we got to a different branch, adjust the default
- ;; branch accordingly, and remove any remaining
- ;; lock on the old version.
- (cond
- ((and old-version new-version
- (not (string= (vc-branch-part old-version)
- (vc-branch-part new-version))))
- (vc-do-command nil 0 "rcs" file 'MASTER
- (if (vc-trunk-p new-version) "-b"
- (concat "-b" (vc-branch-part new-version))))
- ;; exit status of 1 is also accepted.
- ;; It means that the lock was removed before.
- (vc-do-command nil 1 "rcs" file 'MASTER
- (concat "-u" old-version)))))
- ;; CVS
- (progn
- ;; explicit check-in to the trunk requires a
- ;; double check-in (first unexplicit) (CVS-1.3)
- (condition-case nil
- (progn
- (if (and rev (vc-trunk-p rev))
- (apply 'vc-do-command nil 0 "cvs" file 'WORKFILE
- "ci" "-m" "intermediate"
- vc-checkin-switches))
- (apply 'vc-do-command nil 0 "cvs" file 'WORKFILE
- "ci" (if rev (concat "-r" rev))
- (concat "-m" comment)
- vc-checkin-switches))
- (error (if (eq (vc-cvs-status file) 'needs-merge)
- ;; The CVS output will be on top of this message.
- (error "Type C-x 0 C-x C-q to merge in changes.")
- (error "Check in FAILED."))))
- ;; determine and store the new workfile version
- (set-buffer "*vc*")
- (goto-char (point-min))
- (if (re-search-forward
- "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" nil t)
- (vc-file-setprop file 'vc-workfile-version
- (buffer-substring (match-beginning 2)
- (match-end 2)))
- (vc-file-setprop file 'vc-workfile-version nil))
- ;; if this was an explicit check-in, remove the sticky tag
- (if rev
- (vc-do-command nil 0 "cvs" file 'WORKFILE "update" "-A"))
- (vc-file-setprop file 'vc-locking-user 'none)
- (vc-file-setprop file 'vc-checkout-time
- (nth 5 (file-attributes file))))))
+ (let ((switches
+ (if (stringp vc-checkin-switches)
+ (list vc-checkin-switches)
+ vc-checkin-switches)))
+ ;; Clear the master-properties. Do that here, not at the
+ ;; end, because if the check-in fails we want them to get
+ ;; re-computed before the next try.
+ (vc-file-clear-masterprops file)
+ (vc-backend-dispatch file
+ ;; SCCS
+ (progn
+ (apply 'vc-do-command nil 0 "delta" file 'MASTER
+ (if rev (concat "-r" rev))
+ (concat "-y" comment)
+ switches)
+ (vc-file-setprop file 'vc-locking-user 'none)
+ (vc-file-setprop file 'vc-workfile-version nil)
+ (if vc-keep-workfiles
+ (vc-do-command nil 0 "get" file 'MASTER))
+ )
+ ;; RCS
+ (let ((old-version (vc-workfile-version file)) new-version)
+ (apply 'vc-do-command nil 0 "ci" file 'MASTER
+ ;; if available, use the secure check-in option
+ (and (vc-backend-release-p 'RCS "5.6.4") "-j")
+ (concat (if vc-keep-workfiles "-u" "-r") rev)
+ (concat "-m" comment)
+ switches)
+ (vc-file-setprop file 'vc-locking-user 'none)
+ (vc-file-setprop file 'vc-workfile-version nil)
+
+ ;; determine the new workfile version
+ (set-buffer "*vc*")
+ (goto-char (point-min))
+ (if (or (re-search-forward
+ "new revision: \\([0-9.]+\\);" nil t)
+ (re-search-forward
+ "reverting to previous revision \\([0-9.]+\\)" nil t))
+ (progn (setq new-version (buffer-substring (match-beginning 1)
+ (match-end 1)))
+ (vc-file-setprop file 'vc-workfile-version new-version)))
+
+ ;; if we got to a different branch, adjust the default
+ ;; branch accordingly
+ (cond
+ ((and old-version new-version
+ (not (string= (vc-branch-part old-version)
+ (vc-branch-part new-version))))
+ (vc-do-command nil 0 "rcs" file 'MASTER
+ (if (vc-trunk-p new-version) "-b"
+ (concat "-b" (vc-branch-part new-version))))
+ ;; If this is an old RCS release, we might have
+ ;; to remove a remaining lock.
+ (if (not (vc-backend-release-p 'RCS "5.6.2"))
+ ;; exit status of 1 is also accepted.
+ ;; It means that the lock was removed before.
+ (vc-do-command nil 1 "rcs" file 'MASTER
+ (concat "-u" old-version))))))
+ ;; CVS
+ (progn
+ ;; explicit check-in to the trunk requires a
+ ;; double check-in (first unexplicit) (CVS-1.3)
+ (condition-case nil
+ (progn
+ (if (and rev (vc-trunk-p rev))
+ (apply 'vc-do-command nil 0 "cvs" file 'WORKFILE
+ "ci" "-m" "intermediate"
+ switches))
+ (apply 'vc-do-command nil 0 "cvs" file 'WORKFILE
+ "ci" (if rev (concat "-r" rev))
+ (concat "-m" comment)
+ switches))
+ (error (if (eq (vc-cvs-status file) 'needs-merge)
+ ;; The CVS output will be on top of this message.
+ (error "Type C-x 0 C-x C-q to merge in changes")
+ (error "Check-in failed"))))
+ ;; determine and store the new workfile version
+ (set-buffer "*vc*")
+ (goto-char (point-min))
+ (if (re-search-forward
+ "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" nil t)
+ (vc-file-setprop file 'vc-workfile-version
+ (buffer-substring (match-beginning 2)
+ (match-end 2)))
+ (vc-file-setprop file 'vc-workfile-version nil))
+ ;; if this was an explicit check-in, remove the sticky tag
+ (if rev
+ (vc-do-command nil 0 "cvs" file 'WORKFILE "update" "-A"))
+ (vc-file-setprop file 'vc-locking-user 'none)
+ (vc-file-setprop file 'vc-checkout-time
+ (nth 5 (file-attributes file)))))))
(message "Checking in %s...done" file))
(defun vc-backend-revert (file)
)
(vc-do-command nil 0 "rcs" file 'MASTER ;RCS
"-M" (concat "-u" rev) (concat "-l" rev))
- (error "You cannot steal a CVS lock; there are no CVS locks to steal.") ;CVS
+ (error "You cannot steal a CVS lock; there are no CVS locks to steal") ;CVS
)
(vc-file-setprop file 'vc-locking-user (user-login-name))
(message "Stealing lock on %s...done" file)
(setq oldvers (vc-lookup-triple file oldvers))
(setq newvers (vc-lookup-triple file newvers)))
((eq backend 'RCS)
- (if (not oldvers) (setq oldvers (vc-workfile-version file)))))
+ (if (not oldvers) (setq oldvers (vc-workfile-version file)))
+ ;; If we know that --brief is not supported, don't try it.
+ (setq cmp (and cmp (not (eq vc-rcsdiff-knows-brief 'no))))))
;; SCCS and RCS shares a lot of code.
(cond
((or (eq backend 'SCCS) (eq backend 'RCS))
- (let* ((command (if (eq backend 'SCCS)
- "vcdiff"
- "rcsdiff"))
+ (let* ((command (if (eq backend 'SCCS) "vcdiff" "rcsdiff"))
(mode (if (eq backend 'RCS) 'WORKFILE 'MASTER))
(options (append (list (and cmp "--brief")
"-q"
(list diff-switches)))))
(status (apply 'vc-do-command "*vc-diff*" 2
command file mode options)))
- ;; Some RCS versions don't understand "--brief"; work around this.
+ ;; If --brief didn't work, do a double-take and remember it
+ ;; for the future.
(if (eq status 2)
- (apply 'vc-do-command "*vc-diff*" 1 command file 'WORKFILE
- (if cmp (cdr options) options))
- status)))
+ (prog1
+ (apply 'vc-do-command "*vc-diff*" 1 command file 'WORKFILE
+ (if cmp (cdr options) options))
+ (if cmp (setq vc-rcsdiff-knows-brief 'no)))
+ ;; If --brief DID work, remember that, too.
+ (and cmp (not vc-rcsdiff-knows-brief)
+ (setq vc-rcsdiff-knows-brief 'yes))
+ status)))
;; CVS is different.
- ;; cmp is not yet implemented -- we always do a full diff.
((eq backend 'CVS)
(if (string= (vc-workfile-version file) "0") ;CVS
;; This file is added but not yet committed; there is no master file.
- ;; diff it against /dev/null.
(if (or oldvers newvers)
- (error "No revisions of %s exists" file)
- (apply 'vc-do-command
- "*vc-diff*" 1 "diff" file 'WORKFILE "/dev/null"
- (if (listp diff-switches)
- diff-switches
- (list diff-switches))))
+ (error "No revisions of %s exist" file)
+ (if cmp 1 ;; file is added but not committed,
+ ;; we regard this as "changed".
+ ;; diff it against /dev/null.
+ (apply 'vc-do-command
+ "*vc-diff*" 1 "diff" file 'WORKFILE
+ (append (if (listp diff-switches)
+ diff-switches
+ (list diff-switches)) '("/dev/null")))))
+ ;; cmp is not yet implemented -- we always do a full diff.
(apply 'vc-do-command
"*vc-diff*" 1 "cvs" file 'WORKFILE "diff"
(and oldvers (concat "-r" oldvers))
;;; These things should probably be generally available
-(defun vc-file-tree-walk (func &rest args)
- "Walk recursively through default directory.
+(defun vc-file-tree-walk (dirname func &rest args)
+ "Walk recursively through DIRNAME.
Invoke FUNC f ARGS on each non-directory file f underneath it."
- (vc-file-tree-walk-internal (expand-file-name default-directory) func args)
- (message "Traversing directory %s...done" default-directory))
+ (vc-file-tree-walk-internal (expand-file-name dirname) func args)
+ (message "Traversing directory %s...done" dirname))
(defun vc-file-tree-walk-internal (file func args)
(if (not (file-directory-p file))
;;; B 5 . 6 7 8 co -l get -e checkout
;;; C 9 10 . 11 12 co -u unget; get revert
;;; D 13 14 15 . 16 ci -u -m<comment> delta -y<comment>; get checkin
-;;; E 17 18 19 20 . rcs -u -M ; rcs -l unget -n ; get -g steal lock
+;;; E 17 18 19 20 . rcs -u -M -l unget -n ; get -g steal lock
;;;
;;; All commands take the master file name as a last argument (not shown).
;;;
;;; Potential cause: someone else's admin during window P, with
;;; caller's admin happening before their checkout.
;;;
-;;; RCS: ci will fail with a "no lock set by <user>" message.
+;;; RCS: Prior to version 5.6.4, ci fails with message
+;;; "no lock set by <user>". From 5.6.4 onwards, VC uses the new
+;;; ci -i option and the message is "<file>,v: already exists".
;;; SCCS: admin will fail with error (ad19).
;;;
;;; We can let these errors be passed up to the user.
;;;
;;; Potential cause: self-race during window P.
;;;
-;;; RCS: will revert the file to the last saved version and unlock it.
+;;; RCS: Prior to version 5.6.4, reverts the file to the last saved
+;;; version and unlocks it. From 5.6.4 onwards, VC uses the new
+;;; ci -i option, failing with message "<file>,v: already exists".
;;; SCCS: will fail with error (ad19).
;;;
;;; Either of these consequences is acceptable.
;;;
;;; Potential cause: self-race during window P.
;;;
-;;; RCS: will register the caller's workfile as a delta with a
-;;; null change comment (the -t- switch will be ignored).
+;;; RCS: Prior to version 5.6.4, VC registers the caller's workfile as
+;;; a delta with a null change comment (the -t- switch will be
+;;; ignored). From 5.6.4 onwards, VC uses the new ci -i option,
+;;; failing with message "<file>,v: already exists".
;;; SCCS: will fail with error (ad19).
;;;
;;; 4. File looked unregistered but is locked by someone else.
;;; Potential cause: someone else's admin during window P, with
;;; caller's admin happening *after* their checkout.
;;;
-;;; RCS: will fail with a "no lock set by <user>" message.
+;;; RCS: Prior to version 5.6.4, ci fails with a
+;;; "no lock set by <user>" message. From 5.6.4 onwards,
+;;; VC uses the new ci -i option, failing with message
+;;; "<file>,v: already exists".
;;; SCCS: will fail with error (ad19).
;;;
;;; We can let these errors be passed up to the user.
;;;
;;; Potential cause: master file got nuked during window P.
;;;
-;;; RCS: Checks in the user's version as an initial delta.
+;;; RCS: Prior to version 5.6.4, checks in the user's version as an
+;;; initial delta. From 5.6.4 onwards, VC uses the new ci -j
+;;; option, failing with message "no such file or directory".
;;; SCCS: will fail with error ut4.
;;;
-;;; This case is kind of nasty. It means VC may fail to detect the
-;;; loss of previous version information.
+;;; This case is kind of nasty. Under RCS prior to version 5.6.4,
+;;; VC may fail to detect the loss of previous version information.
;;;
;;; 14. File looks like it's locked by the calling user and changed, but it's
;;; actually unlocked.
;;;
;;; In order of decreasing severity:
;;;
-;;; Cases 11 and 15 under RCS are the only one that potentially lose work.
+;;; Cases 11 and 15 are the only ones that potentially lose work.
;;; They would require a self-race for this to happen.
;;;
;;; Case 13 in RCS loses information about previous deltas, retaining