mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-29 07:58:28 +00:00
ce043df24a
Anyone using rcs < 5.6.2 in 2011 probably has a functioning time machine, so does not need hand-holding.
1465 lines
61 KiB
EmacsLisp
1465 lines
61 KiB
EmacsLisp
;;; vc-rcs.el --- support for RCS version-control
|
||
|
||
;; Copyright (C) 1992-2011 Free Software Foundation, Inc.
|
||
|
||
;; Author: FSF (see vc.el for full credits)
|
||
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
|
||
;; Package: vc
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs is free software: you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation, either version 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; GNU Emacs is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; See vc.el
|
||
|
||
;; Some features will not work with ancient RCS versions. Where
|
||
;; appropriate, VC finds out which version you have, and allows or
|
||
;; disallows those features.
|
||
|
||
;; You can support the RCS -x option by customizing vc-rcs-master-templates.
|
||
|
||
;;; Code:
|
||
|
||
;;;
|
||
;;; Customization options
|
||
;;;
|
||
|
||
(eval-when-compile
|
||
(require 'cl)
|
||
(require 'vc))
|
||
|
||
(defcustom 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."
|
||
:type '(choice (const :tag "Auto" nil)
|
||
(string :tag "Specified")
|
||
(const :tag "Unknown" unknown))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-rcs-register-switches nil
|
||
"Switches for registering a file in RCS.
|
||
A string or list of strings passed to the checkin program by
|
||
\\[vc-register]. If nil, use the value of `vc-register-switches'.
|
||
If t, use no switches."
|
||
:type '(choice (const :tag "Unspecified" nil)
|
||
(const :tag "None" t)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List" :value ("") string))
|
||
:version "21.1"
|
||
:group 'vc)
|
||
|
||
(defcustom vc-rcs-diff-switches nil
|
||
"String or list of strings specifying switches for RCS diff under VC.
|
||
If nil, use the value of `vc-diff-switches'. If t, use no switches."
|
||
:type '(choice (const :tag "Unspecified" nil)
|
||
(const :tag "None" t)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List" :value ("") string))
|
||
:version "21.1"
|
||
:group 'vc)
|
||
|
||
(defcustom vc-rcs-header '("\$Id\$")
|
||
"Header keywords to be inserted by `vc-insert-headers'."
|
||
:type '(repeat string)
|
||
:version "24.1" ; no longer consult the obsolete vc-header-alist
|
||
:group 'vc)
|
||
|
||
(defcustom vc-rcsdiff-knows-brief nil
|
||
"Indicates whether rcsdiff understands the --brief option.
|
||
The value is either `yes', `no', or nil. If it is nil, VC tries
|
||
to use --brief and sets this variable to remember whether it worked."
|
||
:type '(choice (const :tag "Work out" nil) (const yes) (const no))
|
||
:group 'vc)
|
||
|
||
;;;###autoload
|
||
(defcustom vc-rcs-master-templates
|
||
(purecopy '("%sRCS/%s,v" "%s%s,v" "%sRCS/%s"))
|
||
"Where to look for RCS master files.
|
||
For a description of possible values, see `vc-check-master-templates'."
|
||
:type '(choice (const :tag "Use standard RCS file names"
|
||
'("%sRCS/%s,v" "%s%s,v" "%sRCS/%s"))
|
||
(repeat :tag "User-specified"
|
||
(choice string
|
||
function)))
|
||
:version "21.1"
|
||
:group 'vc)
|
||
|
||
|
||
;;; Properties of the backend
|
||
|
||
(defun vc-rcs-revision-granularity () 'file)
|
||
|
||
(defun vc-rcs-checkout-model (files)
|
||
"RCS-specific version of `vc-checkout-model'."
|
||
(let ((file (if (consp files) (car files) files))
|
||
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)))))
|
||
|
||
;;;
|
||
;;; State-querying functions
|
||
;;;
|
||
|
||
;; 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.
|
||
;;;###autoload
|
||
(progn
|
||
(defun vc-rcs-registered (f) (vc-default-registered 'RCS f)))
|
||
|
||
(defun vc-rcs-state (file)
|
||
"Implementation of `vc-state' for RCS."
|
||
(if (not (vc-rcs-registered file))
|
||
'unregistered
|
||
(or (boundp 'vc-rcs-headers-result)
|
||
(and vc-consult-headers
|
||
(vc-rcs-consult-headers file)))
|
||
(let ((state
|
||
;; vc-working-revision might not be known; in that case the
|
||
;; property is nil. vc-rcs-fetch-master-state knows how to
|
||
;; handle that.
|
||
(vc-rcs-fetch-master-state file
|
||
(vc-file-getprop file
|
||
'vc-working-revision))))
|
||
(if (not (eq state 'up-to-date))
|
||
state
|
||
(if (vc-workfile-unchanged-p file)
|
||
'up-to-date
|
||
(if (eq (vc-rcs-checkout-model (list file)) 'locking)
|
||
'unlocked-changes
|
||
'edited))))))
|
||
|
||
(defun vc-rcs-state-heuristic (file)
|
||
"State heuristic for RCS."
|
||
(let (vc-rcs-headers-result)
|
||
(if (and vc-consult-headers
|
||
(setq vc-rcs-headers-result
|
||
(vc-rcs-consult-headers file))
|
||
(eq vc-rcs-headers-result 'rev-and-lock))
|
||
(let ((state (vc-file-getprop file 'vc-state)))
|
||
;; If the headers say that the file is not locked, the
|
||
;; permissions can tell us whether locking is used for
|
||
;; the file or not.
|
||
(if (and (eq state 'up-to-date)
|
||
(not (vc-mistrust-permissions file))
|
||
(file-exists-p file))
|
||
(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
|
||
'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 'string))
|
||
(owner-name (nth 2 attributes))
|
||
(permissions (nth 8 attributes)))
|
||
(cond ((and permissions (string-match ".r-..-..-." permissions))
|
||
(vc-file-setprop file 'vc-checkout-model 'locking)
|
||
'up-to-date)
|
||
((and permissions (string-match ".rw..-..-." permissions))
|
||
(if (eq (vc-rcs-checkout-model file) 'locking)
|
||
(if (file-ownership-preserved-p file)
|
||
'edited
|
||
owner-name)
|
||
(if (vc-rcs-workfile-is-newer file)
|
||
'edited
|
||
'up-to-date)))
|
||
(t
|
||
;; Strange permissions. Fall through to
|
||
;; expensive state computation.
|
||
(vc-rcs-state file))))
|
||
(vc-rcs-state file)))))
|
||
|
||
(defun vc-rcs-dir-status (dir update-function)
|
||
;; FIXME: this function should be rewritten or `vc-expand-dirs'
|
||
;; should be changed to take a backend parameter. Using
|
||
;; `vc-expand-dirs' is not TRTD because it returns files from
|
||
;; multiple backends. It should also return 'unregistered files.
|
||
|
||
;; Doing individual vc-state calls is painful but there
|
||
;; is no better way in RCS-land.
|
||
(let ((flist (vc-expand-dirs (list dir)))
|
||
(result nil))
|
||
(dolist (file flist)
|
||
(let ((state (vc-state file))
|
||
(frel (file-relative-name file)))
|
||
(when (and (eq (vc-backend file) 'RCS)
|
||
(not (eq state 'up-to-date)))
|
||
(push (list frel state) result))))
|
||
(funcall update-function result)))
|
||
|
||
(defun vc-rcs-working-revision (file)
|
||
"RCS-specific version of `vc-working-revision'."
|
||
(or (and vc-consult-headers
|
||
(vc-rcs-consult-headers file)
|
||
(vc-file-getprop file 'vc-working-revision))
|
||
(progn
|
||
(vc-rcs-fetch-master-state file)
|
||
(vc-file-getprop file 'vc-working-revision))))
|
||
|
||
(defun vc-rcs-latest-on-branch-p (file &optional version)
|
||
"Return non-nil if workfile version of FILE is the latest on its branch.
|
||
When VERSION is given, perform check for that version."
|
||
(unless version (setq version (vc-working-revision file)))
|
||
(with-temp-buffer
|
||
(string= version
|
||
(if (vc-rcs-trunk-p version)
|
||
(progn
|
||
;; Compare VERSION to the head version number.
|
||
(vc-insert-file (vc-name file) "^[0-9]")
|
||
(vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
|
||
;; If we are not on the trunk, we need to examine the
|
||
;; whole current branch.
|
||
(vc-insert-file (vc-name file) "^desc")
|
||
(vc-rcs-find-most-recent-rev (vc-branch-part version))))))
|
||
|
||
(defun vc-rcs-workfile-unchanged-p (file)
|
||
"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-working-revision file)))
|
||
(status (if (eq vc-rcsdiff-knows-brief 'no)
|
||
(vc-do-command "*vc*" 1 "rcsdiff" file version)
|
||
(vc-do-command "*vc*" 2 "rcsdiff" file "--brief" version))))
|
||
(if (eq status 2)
|
||
(if (not vc-rcsdiff-knows-brief)
|
||
(setq vc-rcsdiff-knows-brief 'no
|
||
status (vc-do-command "*vc*" 1 "rcsdiff" file version))
|
||
(error "rcsdiff failed"))
|
||
(if (not vc-rcsdiff-knows-brief) (setq vc-rcsdiff-knows-brief 'yes)))
|
||
;; The workfile is unchanged if rcsdiff found no differences.
|
||
(zerop status)))
|
||
|
||
|
||
;;;
|
||
;;; State-changing functions
|
||
;;;
|
||
|
||
(defun vc-rcs-create-repo ()
|
||
"Create a new RCS repository."
|
||
;; RCS is totally file-oriented, so all we have to do is make the directory.
|
||
(make-directory "RCS"))
|
||
|
||
(defun vc-rcs-register (files &optional rev comment)
|
||
"Register FILES into the RCS version-control system.
|
||
REV is the optional revision number for the files. COMMENT can be used
|
||
to provide an initial description for each FILES.
|
||
Passes either `vc-rcs-register-switches' or `vc-register-switches'
|
||
to the RCS command.
|
||
|
||
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 name)
|
||
;; When REV is specified, we need to force using "-t-".
|
||
(when rev (unless comment (setq comment "")))
|
||
(dolist (file files)
|
||
(and (not (file-exists-p
|
||
(setq subdir (expand-file-name "RCS"
|
||
(file-name-directory file)))))
|
||
(not (directory-files (file-name-directory file)
|
||
nil ".*,v$" t))
|
||
(yes-or-no-p "Create RCS subdirectory? ")
|
||
(make-directory subdir))
|
||
(apply 'vc-do-command "*vc*" 0 "ci" file
|
||
;; if available, use the secure registering option
|
||
(and (vc-rcs-release-p "5.6.4") "-i")
|
||
(concat (if vc-keep-workfiles "-u" "-r") rev)
|
||
(and comment (concat "-t-" comment))
|
||
(vc-switches 'RCS 'register))
|
||
;; parse output to find master file name and workfile version
|
||
(with-current-buffer "*vc*"
|
||
(goto-char (point-min))
|
||
(if (not (setq name
|
||
(if (looking-at (concat "^\\(.*\\) <-- "
|
||
(file-name-nondirectory file)))
|
||
(match-string 1))))
|
||
;; if we couldn't find the master name,
|
||
;; run vc-rcs-registered to get it
|
||
;; (will be stored into the vc-name property)
|
||
(vc-rcs-registered file)
|
||
(vc-file-setprop file 'vc-name
|
||
(if (file-name-absolute-p name)
|
||
name
|
||
(expand-file-name
|
||
name
|
||
(file-name-directory file))))))
|
||
(vc-file-setprop file 'vc-working-revision
|
||
(if (re-search-forward
|
||
"^initial revision: \\([0-9.]+\\).*\n"
|
||
nil t)
|
||
(match-string 1))))))
|
||
|
||
(defun vc-rcs-responsible-p (file)
|
||
"Return non-nil if RCS thinks it would be responsible for registering FILE."
|
||
;; TODO: check for all the patterns in vc-rcs-master-templates
|
||
(file-directory-p (expand-file-name "RCS" (file-name-directory file))))
|
||
|
||
(defun vc-rcs-receive-file (file rev)
|
||
"Implementation of receive-file for RCS."
|
||
(let ((checkout-model (vc-rcs-checkout-model (list file))))
|
||
(vc-rcs-register file rev "")
|
||
(when (eq checkout-model 'implicit)
|
||
(vc-rcs-set-non-strict-locking file))
|
||
(vc-rcs-set-default-branch file (concat rev ".1"))))
|
||
|
||
(defun vc-rcs-unregister (file)
|
||
"Unregister FILE from RCS.
|
||
If this leaves the RCS subdirectory empty, ask the user
|
||
whether to remove it."
|
||
(let* ((master (vc-name file))
|
||
(dir (file-name-directory master))
|
||
(backup-info (find-backup-file-name master)))
|
||
(if (not backup-info)
|
||
(delete-file master)
|
||
(rename-file master (car backup-info) 'ok-if-already-exists)
|
||
(dolist (f (cdr backup-info)) (ignore-errors (delete-file f))))
|
||
(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
|
||
"^\\([^.]\\|\\.[^.]\\|\\.\\.[^.]\\).*"))
|
||
(yes-or-no-p (format "Directory %s is empty; remove it? " dir))
|
||
(delete-directory dir))))
|
||
|
||
(defun vc-rcs-checkin (files rev comment)
|
||
"RCS-specific version of `vc-backend-checkin'."
|
||
(let ((switches (vc-switches 'RCS 'checkin)))
|
||
;; Now operate on the files
|
||
(dolist (file (vc-expand-dirs files))
|
||
(let ((old-version (vc-working-revision file)) new-version
|
||
(default-branch (vc-file-getprop file 'vc-rcs-default-branch)))
|
||
;; Force branch creation if an appropriate
|
||
;; default branch has been set.
|
||
(and (not rev)
|
||
default-branch
|
||
(string-match (concat "^" (regexp-quote old-version) "\\.")
|
||
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 "*vc*" 0 "ci" (vc-name file)
|
||
;; if available, use the secure check-in option
|
||
(and (vc-rcs-release-p "5.6.4") "-j")
|
||
(concat (if vc-keep-workfiles "-u" "-r") rev)
|
||
(concat "-m" comment)
|
||
switches)
|
||
(vc-file-setprop file 'vc-working-revision nil)
|
||
|
||
;; determine the new workfile version
|
||
(set-buffer "*vc*")
|
||
(goto-char (point-min))
|
||
(when (or (re-search-forward
|
||
"new revision: \\([0-9.]+\\);" nil t)
|
||
(re-search-forward
|
||
"reverting to previous revision \\([0-9.]+\\)" nil t))
|
||
(setq new-version (match-string 1))
|
||
(vc-file-setprop file 'vc-working-revision 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-rcs-set-default-branch file
|
||
(if (vc-rcs-trunk-p new-version) nil
|
||
(vc-branch-part new-version)))
|
||
;; If this is an old (pre-1992!) RCS release, we might have
|
||
;; to remove a remaining lock.
|
||
(if (not (vc-rcs-release-p "5.6.2"))
|
||
;; exit status of 1 is also accepted.
|
||
;; It means that the lock was removed before.
|
||
(vc-do-command "*vc*" 1 "rcs" (vc-name file)
|
||
(concat "-u" old-version)))))))))
|
||
|
||
(defun vc-rcs-find-revision (file rev buffer)
|
||
(apply 'vc-do-command
|
||
(or buffer "*vc*") 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. If FILE is a directory,
|
||
attempt the checkout for all registered files beneath it."
|
||
(if (file-directory-p file)
|
||
(mapc 'vc-rcs-checkout (vc-expand-dirs (list file)))
|
||
(let ((file-buffer (get-file-buffer file))
|
||
switches)
|
||
(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 (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.
|
||
(let ((default-directory default-directory))
|
||
(save-excursion
|
||
;; Adjust the default-directory so that the check-out creates
|
||
;; the file in the right place.
|
||
(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
|
||
"*vc*" 0 "co" (vc-name file)
|
||
;; If locking is not strict, force to overwrite
|
||
;; the writable workfile.
|
||
(if (eq (vc-rcs-checkout-model (list file)) 'implicit) "-f")
|
||
(if editable "-l")
|
||
(if (stringp rev)
|
||
;; a literal revision was specified
|
||
(concat "-r" rev)
|
||
(let ((workrev (vc-working-revision file)))
|
||
(if workrev
|
||
(concat "-r"
|
||
(if (not rev)
|
||
;; no revision specified:
|
||
;; use current workfile version
|
||
workrev
|
||
;; REV is t ...
|
||
(if (not (vc-rcs-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-working-revision 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-rcs-trunk-p new-version) nil
|
||
(vc-branch-part new-version))
|
||
new-version)))))
|
||
(message "Checking out %s...done" file))))))
|
||
|
||
(defun vc-rcs-rollback (files)
|
||
"Roll back, undoing the most recent checkins of FILES. Directories are
|
||
expanded to all registered subfiles in them."
|
||
(if (not files)
|
||
(error "RCS backend doesn't support directory-level rollback"))
|
||
(dolist (file (vc-expand-dirs files))
|
||
(let* ((discard (vc-working-revision file))
|
||
(previous (if (vc-rcs-trunk-p discard) "" (vc-branch-part discard)))
|
||
(config (current-window-configuration))
|
||
(done nil))
|
||
(if (null (yes-or-no-p (format "Remove version %s from %s history? "
|
||
discard file)))
|
||
(error "Aborted"))
|
||
(message "Removing revision %s from %s." discard file)
|
||
(vc-do-command "*vc*" 0 "rcs" (vc-name file) (concat "-o" discard))
|
||
;; 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
|
||
(vc-do-command "*vc*" 0 "co" (vc-name file) "-f"
|
||
(concat "-u" previous))
|
||
(setq done t))
|
||
(error (set-buffer "*vc*")
|
||
(goto-char (point-min))
|
||
(if (search-forward "no side branches present for" nil t)
|
||
(progn (setq previous (vc-branch-part previous))
|
||
(vc-rcs-set-default-branch file previous)
|
||
;; vc-do-command popped up a window with
|
||
;; the error message. Get rid of it, by
|
||
;; restoring the old window configuration.
|
||
(set-window-configuration config))
|
||
;; No, it was some other error: re-signal it.
|
||
(signal (car err) (cdr err)))))))))
|
||
|
||
(defun vc-rcs-revert (file &optional contents-done)
|
||
"Revert FILE to the version it was based on. If FILE is a directory,
|
||
revert all registered files beneath it."
|
||
(if (file-directory-p file)
|
||
(mapc 'vc-rcs-revert (vc-expand-dirs (list file)))
|
||
(vc-do-command "*vc*" 0 "co" (vc-name file) "-f"
|
||
(concat (if (eq (vc-state file) 'edited) "-u" "-r")
|
||
(vc-working-revision file)))))
|
||
|
||
(defun vc-rcs-merge (file first-version &optional second-version)
|
||
"Merge changes into current working copy of FILE.
|
||
The changes are between FIRST-VERSION and SECOND-VERSION."
|
||
(vc-do-command "*vc*" 1 "rcsmerge" (vc-name file)
|
||
"-kk" ; ignore keyword conflicts
|
||
(concat "-r" first-version)
|
||
(if second-version (concat "-r" second-version))))
|
||
|
||
(defun vc-rcs-steal-lock (file &optional rev)
|
||
"Steal the lock on the current workfile for FILE and revision REV.
|
||
If FILE is a directory, steal the lock on all registered files beneath it.
|
||
Needs RCS 5.6.2 or later for -M."
|
||
(if (file-directory-p file)
|
||
(mapc 'vc-rcs-steal-lock (vc-expand-dirs (list file)))
|
||
(vc-do-command "*vc*" 0 "rcs" (vc-name file) "-M" (concat "-u" rev))
|
||
;; Do a real checkout after stealing the lock, so that we see
|
||
;; expanded headers.
|
||
(vc-do-command "*vc*" 0 "co" (vc-name file) "-f" (concat "-l" rev))))
|
||
|
||
(defun vc-rcs-modify-change-comment (files rev comment)
|
||
"Modify the change comments change on FILES on a specified REV. If FILE is a
|
||
directory the operation is applied to all registered files beneath it."
|
||
(dolist (file (vc-expand-dirs files))
|
||
(vc-do-command "*vc*" 0 "rcs" (vc-name file)
|
||
(concat "-m" rev ":" comment))))
|
||
|
||
|
||
;;;
|
||
;;; History functions
|
||
;;;
|
||
|
||
(defun vc-rcs-print-log-cleanup ()
|
||
(let ((inhibit-read-only t))
|
||
(goto-char (point-max))
|
||
(forward-line -1)
|
||
(while (looking-at "=*\n")
|
||
(delete-char (- (match-end 0) (match-beginning 0)))
|
||
(forward-line -1))
|
||
(goto-char (point-min))
|
||
(when (looking-at "[\b\t\n\v\f\r ]+")
|
||
(delete-char (- (match-end 0) (match-beginning 0))))))
|
||
|
||
(defun vc-rcs-print-log (files buffer &optional shortlog start-revision-ignored limit)
|
||
"Get change log associated with FILE. If FILE is a
|
||
directory the operation is applied to all registered files beneath it."
|
||
(vc-do-command (or buffer "*vc*") 0 "rlog" (mapcar 'vc-name (vc-expand-dirs files)))
|
||
(with-current-buffer (or buffer "*vc*")
|
||
(vc-rcs-print-log-cleanup))
|
||
(when limit 'limit-unsupported))
|
||
|
||
(defun vc-rcs-diff (files &optional oldvers newvers buffer)
|
||
"Get a difference report using RCS between two sets of files."
|
||
(apply 'vc-do-command (or buffer "*vc-diff*")
|
||
1 ;; Always go synchronous, the repo is local
|
||
"rcsdiff" (vc-expand-dirs files)
|
||
(append (list "-q"
|
||
(and oldvers (concat "-r" oldvers))
|
||
(and newvers (concat "-r" newvers)))
|
||
(vc-switches 'RCS 'diff))))
|
||
|
||
(defun vc-rcs-comment-history (file)
|
||
"Return a string with all log entries stored in BACKEND for FILE."
|
||
(with-current-buffer "*vc*"
|
||
;; Has to be written this way, this function is used by the CVS backend too
|
||
(vc-call-backend (vc-backend file) 'print-log (list file))
|
||
;; Remove cruft
|
||
(let ((separator (concat "^-+\nrevision [0-9.]+\ndate: .*\n"
|
||
"\\(branches: .*;\n\\)?"
|
||
"\\(\\*\\*\\* empty log message \\*\\*\\*\n\\)?")))
|
||
(goto-char (point-max)) (forward-line -1)
|
||
(while (looking-at "=*\n")
|
||
(delete-char (- (match-end 0) (match-beginning 0)))
|
||
(forward-line -1))
|
||
(goto-char (point-min))
|
||
(if (looking-at "[\b\t\n\v\f\r ]+")
|
||
(delete-char (- (match-end 0) (match-beginning 0))))
|
||
(goto-char (point-min))
|
||
(re-search-forward separator nil t)
|
||
(delete-region (point-min) (point))
|
||
(while (re-search-forward separator nil t)
|
||
(delete-region (match-beginning 0) (match-end 0))))
|
||
;; Return the de-crufted comment list
|
||
(buffer-string)))
|
||
|
||
(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-char (point-min))
|
||
(forward-line (1- (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-char (point-min))
|
||
(forward-line (1- (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-annotate-prefix t
|
||
: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))))
|
||
|
||
(declare-function vc-annotate-convert-time "vc-annotate" (time))
|
||
|
||
(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)
|
||
(prog1 (vc-annotate-convert-time
|
||
(aref (get-text-property (point) :vc-rcs-r/d/a) 1))
|
||
(goto-char (next-single-property-change (point) :vc-annotate-prefix)))))
|
||
|
||
(defun vc-rcs-annotate-extract-revision-at-line ()
|
||
(aref (get-text-property (point) :vc-rcs-r/d/a) 0))
|
||
|
||
|
||
;;;
|
||
;;; Tag system
|
||
;;;
|
||
|
||
(defun vc-rcs-create-tag (backend dir name branchp)
|
||
(when branchp
|
||
(error "RCS backend %s does not support module branches" backend))
|
||
(let ((result (vc-tag-precondition dir)))
|
||
(if (stringp result)
|
||
(error "File %s is not up-to-date" result)
|
||
(vc-file-tree-walk
|
||
dir
|
||
(lambda (f)
|
||
(vc-do-command "*vc*" 0 "rcs" (vc-name f) (concat "-n" name ":")))))))
|
||
|
||
|
||
;;;
|
||
;;; Miscellaneous
|
||
;;;
|
||
|
||
(defun vc-rcs-trunk-p (rev)
|
||
"Return t if REV is a revision on the trunk."
|
||
(not (eq nil (string-match "\\`[0-9]+\\.[0-9]+\\'" rev))))
|
||
|
||
(defun vc-rcs-minor-part (rev)
|
||
"Return the minor revision number of a revision number REV."
|
||
(string-match "[0-9]+\\'" rev)
|
||
(substring rev (match-beginning 0) (match-end 0)))
|
||
|
||
(defun vc-rcs-previous-revision (file rev)
|
||
"Return the revision number immediately preceding REV for FILE,
|
||
or nil if there is no previous revision. This default
|
||
implementation works for MAJOR.MINOR-style revision numbers as
|
||
used by RCS and CVS."
|
||
(let ((branch (vc-branch-part rev))
|
||
(minor-num (string-to-number (vc-rcs-minor-part rev))))
|
||
(when branch
|
||
(if (> minor-num 1)
|
||
;; revision does probably not start a branch or release
|
||
(concat branch "." (number-to-string (1- minor-num)))
|
||
(if (vc-rcs-trunk-p rev)
|
||
;; we are at the beginning of the trunk --
|
||
;; don't know anything to return here
|
||
nil
|
||
;; we are at the beginning of a branch --
|
||
;; return revision of starting point
|
||
(vc-branch-part branch))))))
|
||
|
||
(defun vc-rcs-next-revision (file rev)
|
||
"Return the revision number immediately following REV for FILE,
|
||
or nil if there is no next revision. This default implementation
|
||
works for MAJOR.MINOR-style revision numbers as used by RCS
|
||
and CVS."
|
||
(when (not (string= rev (vc-working-revision file)))
|
||
(let ((branch (vc-branch-part rev))
|
||
(minor-num (string-to-number (vc-rcs-minor-part rev))))
|
||
(concat branch "." (number-to-string (1+ minor-num))))))
|
||
|
||
(defun vc-rcs-update-changelog (files)
|
||
"Default implementation of update-changelog.
|
||
Uses `rcs2log' which only works for RCS and CVS."
|
||
;; FIXME: We (c|sh)ould add support for cvs2cl
|
||
(let ((odefault default-directory)
|
||
(changelog (find-change-log))
|
||
;; Presumably not portable to non-Unixy systems, along with rcs2log:
|
||
(tempfile (make-temp-file
|
||
(expand-file-name "vc"
|
||
(or small-temporary-file-directory
|
||
temporary-file-directory))))
|
||
(login-name (or user-login-name
|
||
(format "uid%d" (number-to-string (user-uid)))))
|
||
(full-name (or add-log-full-name
|
||
(user-full-name)
|
||
(user-login-name)
|
||
(format "uid%d" (number-to-string (user-uid)))))
|
||
(mailing-address (or add-log-mailing-address
|
||
user-mail-address)))
|
||
(find-file-other-window changelog)
|
||
(barf-if-buffer-read-only)
|
||
(vc-buffer-sync)
|
||
(undo-boundary)
|
||
(goto-char (point-min))
|
||
(push-mark)
|
||
(message "Computing change log entries...")
|
||
(message "Computing change log entries... %s"
|
||
(unwind-protect
|
||
(progn
|
||
(setq default-directory odefault)
|
||
(if (eq 0 (apply 'call-process
|
||
(expand-file-name "rcs2log"
|
||
exec-directory)
|
||
nil (list t tempfile) nil
|
||
"-c" changelog
|
||
"-u" (concat login-name
|
||
"\t" full-name
|
||
"\t" mailing-address)
|
||
(mapcar
|
||
(lambda (f)
|
||
(file-relative-name
|
||
(expand-file-name f odefault)))
|
||
files)))
|
||
"done"
|
||
(pop-to-buffer (get-buffer-create "*vc*"))
|
||
(erase-buffer)
|
||
(insert-file-contents tempfile)
|
||
"failed"))
|
||
(setq default-directory (file-name-directory changelog))
|
||
(delete-file tempfile)))))
|
||
|
||
(defun vc-rcs-check-headers ()
|
||
"Check if the current file has any headers in it."
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
|
||
\\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
|
||
|
||
(defun vc-rcs-clear-headers ()
|
||
"Implementation of vc-clear-headers for RCS."
|
||
(let ((case-fold-search nil))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward
|
||
(concat "\\$\\(Author\\|Date\\|Header\\|Id\\|Locker\\|Name\\|"
|
||
"RCSfile\\|Revision\\|Source\\|State\\): [^$\n]+\\$")
|
||
nil t)
|
||
(replace-match "$\\1$"))))
|
||
|
||
(defun vc-rcs-rename-file (old new)
|
||
;; Just move the master file (using vc-rcs-master-templates).
|
||
(vc-rename-master (vc-name old) new vc-rcs-master-templates))
|
||
|
||
(defun vc-rcs-find-file-hook ()
|
||
;; If the file is locked by some other user, make
|
||
;; the buffer read-only. Like this, even root
|
||
;; cannot modify a file that someone else has locked.
|
||
(and (stringp (vc-state buffer-file-name 'RCS))
|
||
(setq buffer-read-only t)))
|
||
|
||
|
||
;;;
|
||
;;; Internal functions
|
||
;;;
|
||
|
||
(defun vc-rcs-workfile-is-newer (file)
|
||
"Return non-nil if FILE is newer than its RCS master.
|
||
This likely means that FILE has been changed with respect
|
||
to its master version."
|
||
(let ((file-time (nth 5 (file-attributes file)))
|
||
(master-time (nth 5 (file-attributes (vc-name file)))))
|
||
(or (> (nth 0 file-time) (nth 0 master-time))
|
||
(and (= (nth 0 file-time) (nth 0 master-time))
|
||
(> (nth 1 file-time) (nth 1 master-time))))))
|
||
|
||
(defun vc-rcs-find-most-recent-rev (branch)
|
||
"Find most recent revision on BRANCH."
|
||
(goto-char (point-min))
|
||
(let ((latest-rev -1) value)
|
||
(while (re-search-forward (concat "^\\(" (regexp-quote branch)
|
||
"\\.\\([0-9]+\\)\\)\ndate[ \t]+[0-9.]+;")
|
||
nil t)
|
||
(let ((rev (string-to-number (match-string 2))))
|
||
(when (< latest-rev rev)
|
||
(setq latest-rev rev)
|
||
(setq value (match-string 1)))))
|
||
(or value
|
||
(vc-branch-part branch))))
|
||
|
||
(defun vc-rcs-fetch-master-state (file &optional working-revision)
|
||
"Compute the master file's idea of the state of FILE.
|
||
If a WORKING-REVISION is given, compute the state of that version,
|
||
otherwise determine the workfile version based on the master file.
|
||
This function sets the properties `vc-working-revision' and
|
||
`vc-checkout-model' to their correct values, based on the master
|
||
file."
|
||
(with-temp-buffer
|
||
(if (or (not (vc-insert-file (vc-name file) "^[0-9]"))
|
||
(progn (goto-char (point-min))
|
||
(not (looking-at "^head[ \t\n]+[^;]+;$"))))
|
||
(error "File %s is not an RCS master file" (vc-name file)))
|
||
(let ((workfile-is-latest nil)
|
||
(default-branch (vc-parse-buffer "^branch[ \t\n]+\\([^;]*\\);" 1)))
|
||
(vc-file-setprop file 'vc-rcs-default-branch default-branch)
|
||
(unless working-revision
|
||
;; Workfile version not known yet. Determine that first. It
|
||
;; is either the head of the trunk, the head of the default
|
||
;; branch, or the "default branch" itself, if that is a full
|
||
;; revision number.
|
||
(cond
|
||
;; no default branch
|
||
((or (not default-branch) (string= "" default-branch))
|
||
(setq working-revision
|
||
(vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
|
||
(setq workfile-is-latest t))
|
||
;; default branch is actually a revision
|
||
((string-match "^[0-9]+\\.[0-9]+\\(\\.[0-9]+\\.[0-9]+\\)*$"
|
||
default-branch)
|
||
(setq working-revision default-branch))
|
||
;; else, search for the head of the default branch
|
||
(t (vc-insert-file (vc-name file) "^desc")
|
||
(setq working-revision
|
||
(vc-rcs-find-most-recent-rev default-branch))
|
||
(setq workfile-is-latest t)))
|
||
(vc-file-setprop file 'vc-working-revision working-revision))
|
||
;; Check strict locking
|
||
(goto-char (point-min))
|
||
(vc-file-setprop file 'vc-checkout-model
|
||
(if (re-search-forward ";[ \t\n]*strict;" nil t)
|
||
'locking 'implicit))
|
||
;; Compute state of workfile version
|
||
(goto-char (point-min))
|
||
(let ((locking-user
|
||
(vc-parse-buffer (concat "^locks[ \t\n]+[^;]*[ \t\n]+\\([^:]+\\):"
|
||
(regexp-quote working-revision)
|
||
"[^0-9.]")
|
||
1)))
|
||
(cond
|
||
;; not locked
|
||
((not locking-user)
|
||
(if (or workfile-is-latest
|
||
(vc-rcs-latest-on-branch-p file working-revision))
|
||
;; workfile version is latest on branch
|
||
'up-to-date
|
||
;; workfile version is not latest on branch
|
||
'needs-update))
|
||
;; locked by the calling user
|
||
((and (stringp locking-user)
|
||
(string= locking-user (vc-user-login-name file)))
|
||
;; Don't call `vc-rcs-checkout-model' to avoid inf-looping.
|
||
(if (or (eq (vc-file-getprop file 'vc-checkout-model) 'locking)
|
||
workfile-is-latest
|
||
(vc-rcs-latest-on-branch-p file working-revision))
|
||
'edited
|
||
;; Locking is not used for the file, but the owner does
|
||
;; have a lock, and there is a higher version on the current
|
||
;; branch. Not sure if this can occur, and if it is right
|
||
;; to use `needs-merge' in this case.
|
||
'needs-merge))
|
||
;; locked by somebody else
|
||
((stringp locking-user)
|
||
locking-user)
|
||
(t
|
||
(error "Error getting state of RCS file")))))))
|
||
|
||
(defun vc-rcs-consult-headers (file)
|
||
"Search for RCS headers in FILE, and set properties accordingly.
|
||
|
||
Returns: nil if no headers were found
|
||
'rev if a workfile revision was found
|
||
'rev-and-lock if revision and lock info was found"
|
||
(cond
|
||
((not (get-file-buffer file)) nil)
|
||
((let (status version locking-user)
|
||
(with-current-buffer (get-file-buffer file)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(cond
|
||
;; search for $Id or $Header
|
||
;; -------------------------
|
||
;; The `\ 's below avoid an RCS 5.7 bug when checking in this file.
|
||
((or (and (search-forward "$Id\ : " nil t)
|
||
(looking-at "[^ ]+ \\([0-9.]+\\) "))
|
||
(and (progn (goto-char (point-min))
|
||
(search-forward "$Header\ : " nil t))
|
||
(looking-at "[^ ]+ \\([0-9.]+\\) ")))
|
||
(goto-char (match-end 0))
|
||
;; if found, store the revision number ...
|
||
(setq version (match-string-no-properties 1))
|
||
;; ... and check for the locking state
|
||
(cond
|
||
((looking-at
|
||
(concat "[0-9]+[/-][01][0-9][/-][0-3][0-9] " ; date
|
||
"[0-2][0-9]:[0-5][0-9]+:[0-6][0-9]+\\([+-][0-9:]+\\)? " ; time
|
||
"[^ ]+ [^ ]+ ")) ; author & state
|
||
(goto-char (match-end 0)) ; [0-6] in regexp handles leap seconds
|
||
(cond
|
||
;; unlocked revision
|
||
((looking-at "\\$")
|
||
(setq locking-user 'none)
|
||
(setq status 'rev-and-lock))
|
||
;; revision is locked by some user
|
||
((looking-at "\\([^ ]+\\) \\$")
|
||
(setq locking-user (match-string-no-properties 1))
|
||
(setq status 'rev-and-lock))
|
||
;; everything else: false
|
||
(nil)))
|
||
;; unexpected information in
|
||
;; keyword string --> quit
|
||
(nil)))
|
||
;; search for $Revision
|
||
;; --------------------
|
||
((re-search-forward (concat "\\$"
|
||
"Revision: \\([0-9.]+\\) \\$")
|
||
nil t)
|
||
;; if found, store the revision number ...
|
||
(setq version (match-string-no-properties 1))
|
||
;; and see if there's any lock information
|
||
(goto-char (point-min))
|
||
(if (re-search-forward (concat "\\$" "Locker:") nil t)
|
||
(cond ((looking-at " \\([^ ]+\\) \\$")
|
||
(setq locking-user (match-string-no-properties 1))
|
||
(setq status 'rev-and-lock))
|
||
((looking-at " *\\$")
|
||
(setq locking-user 'none)
|
||
(setq status 'rev-and-lock))
|
||
(t
|
||
(setq locking-user 'none)
|
||
(setq status 'rev-and-lock)))
|
||
(setq status 'rev)))
|
||
;; else: nothing found
|
||
;; -------------------
|
||
(t nil))))
|
||
(if status (vc-file-setprop file 'vc-working-revision version))
|
||
(and (eq status 'rev-and-lock)
|
||
(vc-file-setprop file 'vc-state
|
||
(cond
|
||
((eq locking-user 'none) 'up-to-date)
|
||
((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
|
||
;; performance gain the headers brought us. We therefore
|
||
;; use a heuristic now to find out whether locking is used
|
||
;; for this file. If we trust the file permissions, and the
|
||
;; file is not locked, then if the file is read-only we
|
||
;; assume that locking is used for the file, otherwise
|
||
;; locking is not used.
|
||
(not (vc-mistrust-permissions file))
|
||
(vc-up-to-date-p file)
|
||
(if (string-match ".r-..-..-." (nth 8 (file-attributes file)))
|
||
(vc-file-setprop file 'vc-checkout-model 'locking)
|
||
(vc-file-setprop file 'vc-checkout-model 'implicit)))
|
||
status))))
|
||
|
||
(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-rcs-release-p (release)
|
||
"Return t if we have RELEASE or better."
|
||
(let ((installation (vc-rcs-system-release)))
|
||
(if (and installation
|
||
(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
|
||
override this using variable `vc-rcs-release'.
|
||
|
||
If the user has not set variable `vc-rcs-release' and it is nil,
|
||
variable `vc-rcs-release' is set to the returned value."
|
||
(or vc-rcs-release
|
||
(setq vc-rcs-release
|
||
(or (and (zerop (vc-do-command "*vc*" nil "rcs" nil "-V"))
|
||
(with-current-buffer (get-buffer "*vc*")
|
||
(vc-parse-buffer "^RCS version \\([0-9.]+ *.*\\)" 1)))
|
||
'unknown))))
|
||
|
||
(defun vc-rcs-set-non-strict-locking (file)
|
||
(vc-do-command "*vc*" 0 "rcs" file "-U")
|
||
(vc-file-setprop file 'vc-checkout-model 'implicit)
|
||
(set-file-modes file (logior (file-modes file) 128)))
|
||
|
||
(defun vc-rcs-set-default-branch (file branch)
|
||
(vc-do-command "*vc*" 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)
|
||
|
||
;;; vc-rcs.el ends here
|