;;; vc-rcs.el --- support for RCS version-control
-;; Copyright (C) 1992,93,94,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
+;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+;; 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
-;; $Id: vc-rcs.el,v 1.23 2002/02/25 22:04:29 spiegel Exp $
+;; $Id$
;; This file is part of GNU Emacs.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; State-querying functions
;;;
-;;;###autoload
-(progn (defun vc-rcs-registered (f) (vc-default-registered 'RCS f)))
+;;; The autoload cookie below places vc-rcs-registered directly into
+;;; loaddefs.el, so that vc-rcs.el does not need to be loaded for
+;;; every file that is visited. The definition is repeated below
+;;; so that Help and etags can find it.
+
+;;;###autoload (defun vc-rcs-registered (f) (vc-default-registered 'RCS f))
+(defun vc-rcs-registered (f) (vc-default-registered 'RCS f))
(defun vc-rcs-state (file)
"Implementation of `vc-state' for RCS."
'vc-workfile-version))))
(if (not (eq state 'up-to-date))
state
- (require 'vc)
(if (vc-workfile-unchanged-p file)
'up-to-date
(if (eq (vc-checkout-model file) 'locking)
(cond
((string-match ".rw..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'implicit)
- (setq state
- (if (vc-rcs-workfile-is-newer file)
- 'edited
+ (setq state
+ (if (vc-rcs-workfile-is-newer file)
+ 'edited
'up-to-date)))
((string-match ".r-..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'locking))))
state)
(if (not (vc-mistrust-permissions file))
- (let* ((attributes (file-attributes file))
- (owner-uid (nth 2 attributes))
+ (let* ((attributes (file-attributes file 'string))
+ (owner-name (nth 2 attributes))
(permissions (nth 8 attributes)))
(cond ((string-match ".r-..-..-." permissions)
(vc-file-setprop file 'vc-checkout-model 'locking)
(if (eq (vc-checkout-model file) 'locking)
(if (file-ownership-preserved-p file)
'edited
- (vc-user-login-name owner-uid))
- (if (vc-rcs-workfile-is-newer file)
+ owner-name)
+ (if (vc-rcs-workfile-is-newer file)
'edited
'up-to-date)))
(t
(defun vc-rcs-checkout-model (file)
"RCS-specific version of `vc-checkout-model'."
- (vc-rcs-consult-headers file)
- (or (vc-file-getprop file 'vc-checkout-model)
- (progn (vc-rcs-fetch-master-state file)
- (vc-file-getprop file 'vc-checkout-model))))
+ (let (result)
+ (when vc-consult-headers
+ (vc-file-setprop file 'vc-checkout-model nil)
+ (vc-rcs-consult-headers file)
+ (setq result (vc-file-getprop file 'vc-checkout-model)))
+ (or result
+ (progn (vc-rcs-fetch-master-state file)
+ (vc-file-getprop file 'vc-checkout-model)))))
(defun vc-rcs-workfile-unchanged-p (file)
- "RCS-specific implementation of vc-workfile-unchanged-p."
+ "RCS-specific implementation of `vc-workfile-unchanged-p'."
;; Try to use rcsdiff --brief. If rcsdiff does not understand that,
;; do a double take and remember the fact for the future
(let* ((version (concat "-r" (vc-workfile-version file)))
Automatically retrieve a read-only version of the file with keywords
expanded if `vc-keep-workfiles' is non-nil, otherwise, delete the workfile."
- (let ((subdir (expand-file-name "RCS" (file-name-directory file)))
- (switches (append
- (if (stringp vc-register-switches)
- (list vc-register-switches)
- vc-register-switches)
- (if (stringp vc-rcs-register-switches)
- (list vc-rcs-register-switches)
- vc-rcs-register-switches))))
-
+ (let ((subdir (expand-file-name "RCS" (file-name-directory file))))
(and (not (file-exists-p subdir))
(not (directory-files (file-name-directory file)
nil ".*,v$" t))
(and (vc-rcs-release-p "5.6.4") "-i")
(concat (if vc-keep-workfiles "-u" "-r") rev)
(and comment (concat "-t-" comment))
- switches)
+ (vc-switches 'RCS 'register))
;; parse output to find master file name and workfile version
(with-current-buffer "*vc*"
(goto-char (point-min))
(and (string= (file-name-nondirectory (directory-file-name dir)) "RCS")
;; check whether RCS dir is empty, i.e. it does not
;; contain any files except "." and ".."
- (not (directory-files dir nil
+ (not (directory-files dir nil
"^\\([^.]\\|\\.[^.]\\|\\.\\.[^.]\\).*"))
(yes-or-no-p (format "Directory %s is empty; remove it? " dir))
(delete-directory dir))))
(defun vc-rcs-checkin (file rev comment)
"RCS-specific version of `vc-backend-checkin'."
- (let ((switches (if (stringp vc-checkin-switches)
- (list vc-checkin-switches)
- vc-checkin-switches)))
+ (let ((switches (vc-switches 'RCS 'checkin)))
(let ((old-version (vc-workfile-version file)) new-version
(default-branch (vc-file-getprop file 'vc-rcs-default-branch)))
- ;; Force branch creation if an appropriate
+ ;; Force branch creation if an appropriate
;; default branch has been set.
(and (not rev)
default-branch
default-branch)
(setq rev default-branch)
(setq switches (cons "-f" switches)))
+ (if (and (not rev) old-version)
+ (setq rev (vc-branch-part old-version)))
(apply 'vc-do-command nil 0 "ci" (vc-name file)
;; if available, use the secure check-in option
(and (vc-rcs-release-p "5.6.4") "-j")
((and old-version new-version
(not (string= (vc-branch-part old-version)
(vc-branch-part new-version))))
- (vc-rcs-set-default-branch file
+ (vc-rcs-set-default-branch file
(if (vc-trunk-p new-version) nil
(vc-branch-part new-version)))
;; If this is an old RCS release, we might have
(vc-do-command nil 1 "rcs" (vc-name file)
(concat "-u" old-version))))))))
-(defun vc-rcs-checkout (file &optional editable rev workfile)
- "Retrieve a copy of a saved version of FILE into a workfile."
- (let ((filename (or workfile file))
- (file-buffer (get-file-buffer file))
+(defun vc-rcs-find-version (file rev buffer)
+ (apply 'vc-do-command
+ buffer 0 "co" (vc-name file)
+ "-q" ;; suppress diagnostic output
+ (concat "-p" rev)
+ (vc-switches 'RCS 'checkout)))
+
+(defun vc-rcs-checkout (file &optional editable rev)
+ "Retrieve a copy of a saved version of FILE."
+ (let ((file-buffer (get-file-buffer file))
switches)
- (message "Checking out %s..." filename)
+ (message "Checking out %s..." file)
(save-excursion
;; 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))
+ (setq switches (vc-switches 'RCS 'checkout))
;; Save this buffer's default-directory
;; and use save-excursion to make sure it is restored
;; in the same buffer it was saved in.
(save-excursion
;; Adjust the default-directory so that the check-out creates
;; the file in the right place.
- (setq default-directory (file-name-directory filename))
- (if workfile ;; RCS
- ;; RCS can't 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))
- (if editable 128 0)))
- (failed t))
- (unwind-protect
- (progn
- (let ((coding-system-for-read 'no-conversion)
- (coding-system-for-write 'no-conversion))
- (with-temp-file filename
- (apply 'vc-do-command
- (current-buffer) 0 "co" (vc-name file)
- "-q" ;; suppress diagnostic output
- (if editable "-l")
- (concat "-p" rev)
- switches)))
- (set-file-modes filename
- (logior (file-modes (vc-name file))
- (if editable 128 0)))
- (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-rcs-set-default-branch file nil))
- ;; now do the checkout
- (apply 'vc-do-command
- nil 0 "co" (vc-name file)
- ;; If locking is not strict, force to overwrite
- ;; the writable workfile.
- (if (eq (vc-checkout-model file) 'implicit) "-f")
- (if editable "-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
- (with-current-buffer "*vc*"
- (setq new-version
- (vc-parse-buffer "^revision \\([0-9.]+\\).*\n" 1)))
- (vc-file-setprop file 'vc-workfile-version new-version)
- ;; if necessary, adjust the default branch
- (and rev (not (string= rev ""))
- (vc-rcs-set-default-branch
- file
- (if (vc-rcs-latest-on-branch-p file new-version)
- (if (vc-trunk-p new-version) nil
- (vc-branch-part new-version))
- new-version))))))
- (message "Checking out %s...done" filename)))))
+ (setq default-directory (file-name-directory file))
+ (let (new-version)
+ ;; if we should go to the head of the trunk,
+ ;; clear the default branch first
+ (and rev (string= rev "")
+ (vc-rcs-set-default-branch file nil))
+ ;; now do the checkout
+ (apply 'vc-do-command
+ nil 0 "co" (vc-name file)
+ ;; If locking is not strict, force to overwrite
+ ;; the writable workfile.
+ (if (eq (vc-checkout-model file) 'implicit) "-f")
+ (if editable "-l")
+ (if (stringp rev)
+ ;; a literal revision was specified
+ (concat "-r" rev)
+ (let ((workrev (vc-workfile-version file)))
+ (if workrev
+ (concat "-r"
+ (if (not rev)
+ ;; no revision specified:
+ ;; use current workfile version
+ workrev
+ ;; REV is t ...
+ (if (not (vc-trunk-p workrev))
+ ;; ... go to head of current branch
+ (vc-branch-part workrev)
+ ;; ... go to head of trunk
+ (vc-rcs-set-default-branch file
+ nil)
+ ""))))))
+ switches)
+ ;; determine the new workfile version
+ (with-current-buffer "*vc*"
+ (setq new-version
+ (vc-parse-buffer "^revision \\([0-9.]+\\).*\n" 1)))
+ (vc-file-setprop file 'vc-workfile-version new-version)
+ ;; if necessary, adjust the default branch
+ (and rev (not (string= rev ""))
+ (vc-rcs-set-default-branch
+ file
+ (if (vc-rcs-latest-on-branch-p file new-version)
+ (if (vc-trunk-p new-version) nil
+ (vc-branch-part new-version))
+ new-version)))))
+ (message "Checking out %s...done" file)))))
(defun vc-rcs-revert (file &optional contents-done)
"Revert FILE to the version it was based on."
(vc-do-command nil 0 "co" (vc-name file) "-f"
- (concat "-u" (vc-workfile-version file))))
+ (concat (if (eq (vc-state file) 'edited) "-u" "-r")
+ (vc-workfile-version file))))
(defun vc-rcs-cancel-version (file editable)
"Undo the most recent checkin of FILE.
"Steal the lock on the current workfile for FILE and revision REV.
Needs RCS 5.6.2 or later for -M."
(vc-do-command nil 0 "rcs" (vc-name file) "-M" (concat "-u" rev))
- ;; Do a real checkout after stealing the lock, so that we see
+ ;; Do a real checkout after stealing the lock, so that we see
;; expanded headers.
(vc-do-command nil 0 "co" (vc-name file) "-f" (concat "-l" rev)))
;;; History functions
;;;
-(defun vc-rcs-print-log (file)
+(defun vc-rcs-print-log (file &optional buffer)
"Get change log associated with FILE."
- (vc-do-command nil 0 "rlog" (vc-name file)))
-
-(defun vc-rcs-show-log-entry (version)
- (when (re-search-forward
- ;; also match some context, for safety
- (concat "----\nrevision " version
- "\\(\tlocked by:.*\n\\|\n\\)date: ") nil t)
- ;; set the display window so that
- ;; the whole log entry is displayed
- (let (start end lines)
- (beginning-of-line) (forward-line -1) (setq start (point))
- (if (not (re-search-forward "^----*\nrevision" nil t))
- (setq end (point-max))
- (beginning-of-line) (forward-line -1) (setq end (point)))
- (setq lines (count-lines start end))
- (cond
- ;; if the global information and this log entry fit
- ;; into the window, display from the beginning
- ((< (count-lines (point-min) end) (window-height))
- (goto-char (point-min))
- (recenter 0)
- (goto-char start))
- ;; if the whole entry fits into the window,
- ;; display it centered
- ((< (1+ lines) (window-height))
- (goto-char start)
- (recenter (1- (- (/ (window-height) 2) (/ lines 2)))))
- ;; otherwise (the entry is too large for the window),
- ;; display from the start
- (t
- (goto-char start)
- (recenter 0))))))
-
-(defun vc-rcs-diff (file &optional oldvers newvers)
+ (vc-do-command buffer 0 "rlog" (vc-name file)))
+
+(defun vc-rcs-diff (file &optional oldvers newvers buffer)
"Get a difference report using RCS between two versions of FILE."
(if (not oldvers) (setq oldvers (vc-workfile-version file)))
- (apply 'vc-do-command "*vc-diff*" 1 "rcsdiff" file
+ (apply 'vc-do-command (or buffer "*vc-diff*") 1 "rcsdiff" file
(append (list "-q"
(concat "-r" oldvers)
(and newvers (concat "-r" newvers)))
- (vc-diff-switches-list 'RCS))))
+ (vc-switches 'RCS 'diff))))
+
+(defun vc-rcs-annotate-command (file buffer &optional revision)
+ "Annotate FILE, inserting the results in BUFFER.
+Optional arg REVISION is a revision to annotate from."
+ (vc-setup-buffer buffer)
+ ;; Aside from the "head revision on the trunk", the instructions for
+ ;; each revision on the trunk are an ordered list of kill and insert
+ ;; commands necessary to go from the chronologically-following
+ ;; revision to this one. That is, associated with revision N are
+ ;; edits that applied to revision N+1 would result in revision N.
+ ;;
+ ;; On a branch, however, (some) things are inverted: the commands
+ ;; listed are those necessary to go from the chronologically-preceding
+ ;; revision to this one. That is, associated with revision N are
+ ;; edits that applied to revision N-1 would result in revision N.
+ ;;
+ ;; So, to get per-line history info, we apply reverse-chronological
+ ;; edits, starting with the head revision on the trunk, all the way
+ ;; back through the initial revision (typically "1.1" or similar),
+ ;; then apply forward-chronological edits -- keeping track of which
+ ;; revision is associated with each inserted line -- until we reach
+ ;; the desired revision for display (which may be either on the trunk
+ ;; or on a branch).
+ (let* ((tree (with-temp-buffer
+ (insert-file-contents (vc-rcs-registered file))
+ (vc-rcs-parse)))
+ (revisions (cdr (assq 'revisions tree)))
+ ;; The revision N whose instructions we currently are processing.
+ (cur (cdr (assq 'head (cdr (assq 'headers tree)))))
+ ;; Alist from the parse tree for N.
+ (meta (cdr (assoc cur revisions)))
+ ;; Point and temporary string, respectively.
+ p s
+ ;; "Next-branch list". Nil means the desired revision to
+ ;; display lives on the trunk. Non-nil means it lives on a
+ ;; branch, in which case the value is a list of revision pairs
+ ;; (PARENT . CHILD), the first PARENT being on the trunk, that
+ ;; links each series of revisions in the path from the initial
+ ;; revision to the desired revision to display.
+ nbls
+ ;; "Path-accumulate-predicate plus revision/date/author".
+ ;; Until set, forward-chronological edits are not accumulated.
+ ;; Once set, its value (updated every revision) is used for
+ ;; the text property `:vc-rcs-r/d/a' for inserts during
+ ;; processing of forward-chronological instructions for N.
+ ;; See internal func `r/d/a'.
+ prda
+ ;; List of forward-chronological instructions, each of the
+ ;; form: (POS . ACTION), where POS is a buffer position. If
+ ;; ACTION is a string, it is inserted, otherwise it is taken as
+ ;; the number of characters to be deleted.
+ path
+ ;; N+1. When `cur' is "", this is the initial revision.
+ pre)
+ (unless revision
+ (setq revision cur))
+ (unless (assoc revision revisions)
+ (error "No such revision: %s" revision))
+ ;; Find which branches (if any) must be included in the edits.
+ (let ((par revision)
+ bpt kids)
+ (while (setq bpt (vc-branch-part par)
+ par (vc-branch-part bpt))
+ (setq kids (cdr (assq 'branches (cdr (assoc par revisions)))))
+ ;; A branchpoint may have multiple children. Find the right one.
+ (while (not (string= bpt (vc-branch-part (car kids))))
+ (setq kids (cdr kids)))
+ (push (cons par (car kids)) nbls)))
+ ;; Start with the full text.
+ (set-buffer buffer)
+ (insert (cdr (assq 'text meta)))
+ ;; Apply reverse-chronological edits on the trunk, computing and
+ ;; accumulating forward-chronological edits after some point, for
+ ;; later.
+ (flet ((r/d/a () (vector pre
+ (cdr (assq 'date meta))
+ (cdr (assq 'author meta)))))
+ (while (when (setq pre cur cur (cdr (assq 'next meta)))
+ (not (string= "" cur)))
+ (setq
+ ;; Start accumulating the forward-chronological edits when N+1
+ ;; on the trunk is either the desired revision to display, or
+ ;; the appropriate branchpoint for it. Do this before
+ ;; updating `meta' since `r/d/a' uses N+1's `meta' value.
+ prda (when (or prda (string= (if nbls (caar nbls) revision) pre))
+ (r/d/a))
+ meta (cdr (assoc cur revisions)))
+ ;; Edits in the parse tree specify a line number (in the buffer
+ ;; *BEFORE* editing occurs) to start from, but line numbers
+ ;; change as a result of edits. To DTRT, we apply edits in
+ ;; order of descending buffer position so that edits further
+ ;; down in the buffer occur first w/o corrupting specified
+ ;; buffer positions of edits occurring towards the beginning of
+ ;; the buffer. In this way we avoid using markers. A pleasant
+ ;; property of this approach is ability to push instructions
+ ;; onto `path' directly, w/o need to maintain rev boundaries.
+ (dolist (insn (cdr (assq :insn meta)))
+ (goto-line (pop insn))
+ (setq p (point))
+ (case (pop insn)
+ (k (setq s (buffer-substring-no-properties
+ p (progn (forward-line (car insn))
+ (point))))
+ (when prda
+ (push `(,p . ,(propertize s :vc-rcs-r/d/a prda)) path))
+ (delete-region p (point)))
+ (i (setq s (car insn))
+ (when prda
+ (push `(,p . ,(length s)) path))
+ (insert s)))))
+ ;; For the initial revision, setting `:vc-rcs-r/d/a' directly is
+ ;; equivalent to pushing an insert instruction (of the entire buffer
+ ;; contents) onto `path' then erasing the buffer, but less wasteful.
+ (put-text-property (point-min) (point-max) :vc-rcs-r/d/a (r/d/a))
+ ;; Now apply the forward-chronological edits for the trunk.
+ (dolist (insn path)
+ (goto-char (pop insn))
+ (if (stringp insn)
+ (insert insn)
+ (delete-char insn)))
+ ;; Now apply the forward-chronological edits (directly from the
+ ;; parse-tree) for the branch(es), if necessary. We re-use vars
+ ;; `pre' and `meta' for the sake of internal func `r/d/a'.
+ (while nbls
+ (setq pre (cdr (pop nbls)))
+ (while (progn
+ (setq meta (cdr (assoc pre revisions))
+ prda nil)
+ (dolist (insn (cdr (assq :insn meta)))
+ (goto-line (pop insn))
+ (case (pop insn)
+ (k (delete-region
+ (point) (progn (forward-line (car insn))
+ (point))))
+ (i (insert (propertize
+ (car insn)
+ :vc-rcs-r/d/a
+ (or prda (setq prda (r/d/a))))))))
+ (prog1 (not (string= (if nbls (caar nbls) revision) pre))
+ (setq pre (cdr (assq 'next meta)))))))))
+ ;; Lastly, for each line, insert at bol nicely-formatted history info.
+ ;; We do two passes to collect summary information used to minimize
+ ;; the annotation's usage of screen real-estate: (1) Consider rendered
+ ;; width of revision plus author together as a unit; and (2) Omit
+ ;; author entirely if all authors are the same as the user.
+ (let ((ht (make-hash-table :test 'eq))
+ (me (user-login-name))
+ (maxw 0)
+ (all-me t)
+ rda w a)
+ (goto-char (point-max))
+ (while (not (bobp))
+ (forward-line -1)
+ (setq rda (get-text-property (point) :vc-rcs-r/d/a))
+ (unless (gethash rda ht)
+ (setq a (aref rda 2)
+ all-me (and all-me (string= a me)))
+ (puthash rda (setq w (+ (length (aref rda 0))
+ (length a)))
+ ht)
+ (setq maxw (max w maxw))))
+ (let ((padding (make-string maxw 32)))
+ (flet ((pad (w) (substring-no-properties padding w))
+ (render (rda &rest ls)
+ (propertize
+ (apply 'concat
+ (format-time-string "%Y-%m-%d" (aref rda 1))
+ " "
+ (aref rda 0)
+ ls)
+ :vc-rcs-r/d/a rda)))
+ (maphash
+ (if all-me
+ (lambda (rda w)
+ (puthash rda (render rda (pad w) ": ") ht))
+ (lambda (rda w)
+ (puthash rda (render rda " " (pad w) " " (aref rda 2) ": ") ht)))
+ ht)))
+ (while (not (eobp))
+ (insert (gethash (get-text-property (point) :vc-rcs-r/d/a) ht))
+ (forward-line 1))))
+
+(defun vc-rcs-annotate-current-time ()
+ "Return the current time, based at midnight of the current day, and
+encoded as fractional days."
+ (vc-annotate-convert-time
+ (apply 'encode-time 0 0 0 (nthcdr 3 (decode-time (current-time))))))
+
+(defun vc-rcs-annotate-time ()
+ "Return the time of the next annotation (as fraction of days)
+systime, or nil if there is none. Also, reposition point."
+ (unless (eobp)
+ (search-forward ": ")
+ (vc-annotate-convert-time
+ (aref (get-text-property (point) :vc-rcs-r/d/a) 1))))
+
+(defun vc-rcs-annotate-extract-revision-at-line ()
+ (aref (get-text-property (point) :vc-rcs-r/d/a) 0))
\f
;;;
`vc-checkout-model' to their correct values, based on the master
file."
(with-temp-buffer
- (vc-insert-file (vc-name file) "^[0-9]")
+ (if (or (not (vc-insert-file (vc-name file) "^[0-9]"))
+ (progn (goto-char (point-min))
+ (not (looking-at "^head[ \t\n]+[^;]+;$"))))
+ (error "File %s is not an RCS master file" (vc-name file)))
(let ((workfile-is-latest nil)
(default-branch (vc-parse-buffer "^branch[ \t\n]+\\([^;]*\\);" 1)))
(vc-file-setprop file 'vc-rcs-default-branch default-branch)
'needs-patch))
;; locked by the calling user
((and (stringp locking-user)
- (string= locking-user (vc-user-login-name)))
+ (string= locking-user (vc-user-login-name file)))
(if (or (eq (vc-checkout-model file) 'locking)
workfile-is-latest
(vc-rcs-latest-on-branch-p file workfile-version))
(vc-file-setprop file 'vc-state
(cond
((eq locking-user 'none) 'up-to-date)
- ((string= locking-user (vc-user-login-name)) 'edited)
+ ((string= locking-user (vc-user-login-name file))
+ 'edited)
(t locking-user)))
;; If the file has headers, we don't want to query the
;; master file, because that would eliminate all the
(not (eq installation 'unknown)))
(vc-release-greater-or-equal installation release))))
-
(defun vc-rcs-system-release ()
"Return the RCS release installed on this system, as a string.
Return symbol UNKNOWN if the release cannot be deducted. The user can
(vc-do-command nil 0 "rcs" (vc-name file) (concat "-b" branch))
(vc-file-setprop file 'vc-rcs-default-branch branch))
+(defun vc-rcs-parse (&optional buffer)
+ "Parse current buffer, presumed to be in RCS-style masterfile format.
+Optional arg BUFFER specifies another buffer to parse. Return an alist
+of two elements, w/ keys `headers' and `revisions' and values in turn
+sub-alists. For `headers', the values unless otherwise specified are
+strings and the keys are:
+
+ desc -- description
+ head -- latest revision
+ branch -- the branch the \"head revision\" lies on;
+ absent if the head revision lies on the trunk
+ access -- ???
+ symbols -- sub-alist of (SYMBOL . REVISION) elements
+ locks -- if file is checked out, something like \"ttn:1.7\"
+ strict -- t if \"strict locking\" is in effect, otherwise nil
+ comment -- may be absent; typically something like \"# \" or \"; \"
+ expand -- may be absent; ???
+
+For `revisions', the car is REVISION (string), the cdr a sub-alist,
+with string values (unless otherwise specified) and keys:
+
+ date -- a time value (like that returned by `encode-time'); as a
+ special case, a year value less than 100 is augmented by 1900
+ author -- username
+ state -- typically \"Exp\" or \"Rel\"
+ branches -- list of revisions that begin branches from this revision
+ next -- on the trunk: the chronologically-preceding revision, or \"\";
+ on a branch: the chronologically-following revision, or \"\"
+ log -- change log entry
+ text -- for the head revision on the trunk, the body of the file;
+ other revisions have `:insn' instead
+ :insn -- for non-head revisions, a list of parsed instructions
+ in one of two forms, in both cases START meaning \"first
+ go to line START\":
+ - `(START k COUNT)' -- kill COUNT lines
+ - `(START i TEXT)' -- insert TEXT (a string)
+ The list is in descending order by START.
+
+The `:insn' key is a keyword to distinguish it as a vc-rcs.el extension."
+ (setq buffer (get-buffer (or buffer (current-buffer))))
+ (set-buffer buffer)
+ ;; An RCS masterfile can be viewed as containing four regular (for the
+ ;; most part) sections: (a) the "headers", (b) the "rev headers", (c)
+ ;; the "description" and (d) the "rev bodies", in that order. In the
+ ;; returned alist (see docstring), elements from (b) and (d) are
+ ;; combined pairwise to form the "revisions", while those from (a) and
+ ;; (c) are simply combined to form the "headers".
+ ;;
+ ;; Loosely speaking, each section contains a series of alternating
+ ;; "tags" and "printed representations". In the (b) and (d), many
+ ;; such series can appear, and a revision number on a line by itself
+ ;; precedes the series of tags and printed representations associated
+ ;; with it.
+ ;;
+ ;; In (a) and (b), the printed representations (with the exception of
+ ;; the `comment' tag in the headers) terminate with a semicolon, which
+ ;; is NOT part of the "value" finally associated with the tag. All
+ ;; other printed representations are in "@@-format"; there is an "@",
+ ;; the middle part (to be translated into the value), another "@" and
+ ;; a newline. Each "@@" in the middle part indicates the position of
+ ;; a single "@" (and consequently the requirement of an additional
+ ;; initial step when translating to the value).
+ ;;
+ ;; Parser state includes vars that collect parts of the return value...
+ (let ((desc nil) (headers nil) (revs nil)
+ ;; ... as well as vars that support a single-pass, tag-assisted,
+ ;; minimal-data-copying scan. Basically -- skirting around the
+ ;; grouping by revision required in (b) and (d) -- we repeatedly
+ ;; and context-sensitively read a tag (that MUST be present),
+ ;; determine the bounds of the printed representation, translate
+ ;; it into a value, and push the tag plus value onto one of the
+ ;; collection vars. Finally, we return the parse tree
+ ;; incorporating the values of the collection vars (see "rv").
+ ;;
+ ;; A symbol or string to keep track of context (for error messages).
+ context
+ ;; A symbol, the current tag.
+ tok
+ ;; Region (begin and end buffer positions) of the printed
+ ;; representation for the current tag.
+ b e
+ ;; A list of buffer positions where "@@" can be found within the
+ ;; printed representation region. For each location, we push two
+ ;; elements onto the list, 1+ and 2+ the location, respectively,
+ ;; with the 2+ appearing at the head. In this way, the expression
+ ;; `(,e ,@@-holes ,b)
+ ;; describes regions that can be concatenated (in reverse order)
+ ;; to "de-@@-format" the printed representation as the first step
+ ;; to translating it into some value. See internal func `gather'.
+ @-holes)
+ (flet ((sw () (skip-chars-forward " \t\n")) ; i.e., `[:space:]'
+ (at (tag) (save-excursion (eq tag (read buffer))))
+ (to-eol () (buffer-substring-no-properties
+ (point) (progn (forward-line 1)
+ (1- (point)))))
+ (to-semi () (setq b (point)
+ e (progn (search-forward ";")
+ (1- (point)))))
+ (to-one@ () (setq @-holes nil
+ b (progn (search-forward "@") (point))
+ e (progn (while (and (search-forward "@")
+ (= ?@ (char-after))
+ (progn
+ (push (point) @-holes)
+ (forward-char 1)
+ (push (point) @-holes))))
+ (1- (point)))))
+ (tok+val (set-b+e name &optional proc)
+ (unless (eq name (setq tok (read buffer)))
+ (error "Missing `%s' while parsing %s" name context))
+ (sw)
+ (funcall set-b+e)
+ (cons tok (if proc
+ (funcall proc)
+ (buffer-substring-no-properties b e))))
+ (k-semi (name &optional proc) (tok+val 'to-semi name proc))
+ (gather () (let ((pairs `(,e ,@@-holes ,b))
+ acc)
+ (while pairs
+ (push (buffer-substring-no-properties
+ (cadr pairs) (car pairs))
+ acc)
+ (setq pairs (cddr pairs)))
+ (apply 'concat acc)))
+ (k-one@ (name &optional later) (tok+val 'to-one@ name
+ (if later
+ (lambda () t)
+ 'gather))))
+ (save-excursion
+ (goto-char (point-min))
+ ;; headers
+ (setq context 'headers)
+ (flet ((hpush (name &optional proc)
+ (push (k-semi name proc) headers)))
+ (hpush 'head)
+ (when (at 'branch)
+ (hpush 'branch))
+ (hpush 'access)
+ (hpush 'symbols
+ (lambda ()
+ (mapcar (lambda (together)
+ (let ((two (split-string together ":")))
+ (setcar two (intern (car two)))
+ (setcdr two (cadr two))
+ two))
+ (split-string
+ (buffer-substring-no-properties b e)))))
+ (hpush 'locks))
+ (push `(strict . ,(when (at 'strict)
+ (search-forward ";")
+ t))
+ headers)
+ (when (at 'comment)
+ (push (k-one@ 'comment) headers)
+ (search-forward ";"))
+ (when (at 'expand)
+ (push (k-one@ 'expand) headers)
+ (search-forward ";"))
+ (setq headers (nreverse headers))
+ ;; rev headers
+ (sw) (setq context 'rev-headers)
+ (while (looking-at "[0-9]")
+ (push `(,(to-eol)
+ ,(k-semi 'date
+ (lambda ()
+ (let ((ls (mapcar 'string-to-number
+ (split-string
+ (buffer-substring-no-properties
+ b e)
+ "\\."))))
+ ;; Hack the year -- verified to be the
+ ;; same algorithm used in RCS 5.7.
+ (when (< (car ls) 100)
+ (setcar ls (+ 1900 (car ls))))
+ (apply 'encode-time (nreverse ls)))))
+ ,@(mapcar 'k-semi '(author state))
+ ,(k-semi 'branches
+ (lambda ()
+ (split-string
+ (buffer-substring-no-properties b e))))
+ ,(k-semi 'next))
+ revs)
+ (sw))
+ (setq revs (nreverse revs))
+ ;; desc
+ (sw) (setq context 'desc
+ desc (k-one@ 'desc))
+ ;; rev bodies
+ (let (acc
+ ;; Element of `revs' that initially holds only header info.
+ ;; "Pairwise combination" occurs when we add body info.
+ rev
+ ;; Components of the editing commands (aside from the actual
+ ;; text) that comprise the `text' printed representations
+ ;; (not including the "head" revision).
+ cmd start act
+ ;; Ascending (reversed) `@-holes' which the internal func
+ ;; `incg' pops to effect incremental gathering.
+ asc
+ ;; Function to extract text (for the `a' command), either
+ ;; `incg' or `buffer-substring-no-properties'. (This is
+ ;; for speed; strictly speaking, it is sufficient to use
+ ;; only the former since it behaves identically to the
+ ;; latter in the absense of "@@".)
+ sub)
+ (flet ((incg (beg end) (let ((b beg) (e end) @-holes)
+ (while (and asc (< (car asc) e))
+ (push (pop asc) @-holes))
+ ;; Self-deprecate when work is done.
+ ;; Folding many dimensions into one.
+ ;; Thanks B.Mandelbrot, for complex sum.
+ ;; O beauteous math! --the Unvexed Bum
+ (unless asc
+ (setq sub 'buffer-substring-no-properties))
+ (gather))))
+ (while (and (sw)
+ (not (eobp))
+ (setq context (to-eol)
+ rev (or (assoc context revs)
+ (error "Rev `%s' has body but no head"
+ context))))
+ (push (k-one@ 'log) (cdr rev))
+ ;; For rev body `text' tags, delay translation slightly...
+ (push (k-one@ 'text t) (cdr rev))
+ ;; ... until we decide which tag and value is appropriate to
+ ;; collect. For the "head" revision, compute the value of the
+ ;; `text' printed representation by simple `gather'. For all
+ ;; other revisions, replace the `text' tag+value with `:insn'
+ ;; plus value, always scanning in-place.
+ (if (string= context (cdr (assq 'head headers)))
+ (setcdr (cadr rev) (gather))
+ (if @-holes
+ (setq asc (nreverse @-holes)
+ sub 'incg)
+ (setq sub 'buffer-substring-no-properties))
+ (goto-char b)
+ (setq acc nil)
+ (while (< (point) e)
+ (forward-char 1)
+ (setq cmd (char-before)
+ start (read (current-buffer))
+ act (read (current-buffer)))
+ (forward-char 1)
+ (push (case cmd
+ (?d
+ ;; `d' means "delete lines".
+ ;; For Emacs spirit, we use `k' for "kill".
+ `(,start k ,act))
+ (?a
+ ;; `a' means "append after this line" but
+ ;; internally we normalize it so that START
+ ;; specifies the actual line for insert, thus
+ ;; requiring less hair in the realization algs.
+ ;; For Emacs spirit, we use `i' for "insert".
+ `(,(1+ start) i
+ ,(funcall sub (point) (progn (forward-line act)
+ (point)))))
+ (t (error "Bad command `%c' in `text' for rev `%s'"
+ cmd context)))
+ acc))
+ (goto-char (1+ e))
+ (setcar (cdr rev) (cons :insn acc)))))))
+ ;; rv
+ `((headers ,desc ,@headers)
+ (revisions ,@revs)))))
+
(provide 'vc-rcs)
+;; arch-tag: 759b4916-5b0d-431d-b647-b185b8c652cf
;;; vc-rcs.el ends here