Commit 0db2c43c authored by André Spiegel's avatar André Spiegel

(vc-rcs-workfile-is-newer): New function.

(vc-rcs-state-heuristic): Use it to guess the state of files with
non-strict locking.
(vc-rcs-find-most-recent-rev): Handle the case when a branch has been
set with -b, but not created yet.
(vc-rcs-fetch-master-state): With non-strict locking, compare file
contents in order to find the state.
(vc-rcs-checkin): Allow creation of branches with no changes.
(vc-rcs-unregister, vc-rcs-receive-file,
vc-rcs-set-non-strict-locking): New functions.
parent 64341022
......@@ -5,7 +5,7 @@
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Andre Spiegel <>
;; $Id: vc-rcs.el,v 1.3 2000/09/07 20:02:38 fx Exp $
;; $Id: vc-rcs.el,v 1.4 2000/09/09 00:48:40 monnier Exp $
;; This file is part of GNU Emacs.
......@@ -132,7 +132,11 @@ For a description of possible values, see `vc-check-master-templates'."
(not (vc-mistrust-permissions file)))
((string-match ".rw..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'implicit))
(vc-file-setprop file 'vc-checkout-model 'implicit)
(setq state
(if (vc-rcs-workfile-is-newer file)
((string-match ".r-..-..-." (nth 8 (file-attributes file)))
(vc-file-setprop file 'vc-checkout-model 'locking))))
......@@ -144,15 +148,29 @@ For a description of possible values, see `vc-check-master-templates'."
(vc-file-setprop file 'vc-checkout-model 'locking)
((string-match ".rw..-..-." permissions)
(if (file-ownership-preserved-p file)
(vc-user-login-name owner-uid)))
(if (eq (vc-checkout-model file) 'locking)
(if (file-ownership-preserved-p file)
(vc-user-login-name owner-uid))
(if (vc-rcs-workfile-is-newer file)
;; Strange permissions. Fall through to
;; expensive state computation.
(vc-rcs-state file))))
(vc-rcs-state file)))))
(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-workfile-version (file)
"RCS-specific version of `vc-workfile-version'."
(or (and vc-consult-headers
......@@ -182,7 +200,8 @@ For a description of possible values, see `vc-check-master-templates'."
(when (< latest-rev rev)
(setq latest-rev rev)
(setq value (match-string 1)))))
(or value
(vc-rcs-branch-part branch))))
(defun vc-rcs-fetch-master-state (file &optional workfile-version)
"Compute the master file's idea of the state of FILE.
......@@ -234,7 +253,12 @@ file."
(if (or workfile-is-latest
(vc-rcs-latest-on-branch-p file workfile-version))
;; workfile version is latest on branch
(if (eq (vc-checkout-model file) 'locking)
(require 'vc)
(if (vc-workfile-unchanged-p file)
;; workfile version is not latest on branch
;; locked by the calling user
......@@ -565,6 +589,10 @@ CVS releases are handled reasonably, too \(1.3 < 1.4* < 1.5\)."
(and (vc-rcs-release-p "5.6.4") "-j")
(concat (if vc-keep-workfiles "-u" "-r") rev)
(concat "-m" comment)
;; allow creation of branches with no changes;
;; this is used by vc-rcs-receive-file if the
;; base version cannot be found
(if (string-match ".1.1$" rev) "-f")
(vc-file-setprop file 'vc-workfile-version nil)
......@@ -680,6 +708,61 @@ expanded if `vc-keep-workfiles' is non-nil, otherwise, delete the workfile."
nil t)
(match-string 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)))
(delete-file master)
(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-receive-file (file move)
"Implementation of receive-file for RCS."
(let ((old-backend (vc-backend file))
(rev (vc-workfile-version file))
(state (vc-state file))
(checkout-model (vc-checkout-model file))
(comment (and move
(vc-find-backend-function old-backend 'comment-history)
(vc-call 'comment-history file))))
(if move (vc-unregister file old-backend))
(vc-file-clearprops file)
(if (not (vc-rcs-registered file))
;; TODO: If the file was 'edited under the old backend,
;; this should actually register the version
;; it was based on.
(vc-rcs-register file rev "")
`((vc-backend ,backend)))
(if (eq checkout-model 'implicit)
(vc-rcs-set-non-strict-locking file))
(if (not move)
(vc-do-command nil 0 "rcs" file (concat "-b" rev ".1"))))
(vc-file-setprop file 'vc-backend backend)
(vc-file-setprop file 'vc-state 'edited)
(set-file-modes file
(logior (file-modes file) 128)))
(when (or move (eq state 'edited))
(vc-file-setprop file 'vc-state 'edited)
;; TODO: The comment history should actually become the
;; initial contents of the log entry buffer.
(and comment (ring-insert vc-comment-ring comment))
(vc-checkin file (concat rev ".1.1")))))
(defun vc-rcs-set-non-strict-locking (file)
(vc-do-command nil 0 "rcs" file "-U")
(vc-file-setprop file 'vc-checkout-model 'implicit)
(set-file-modes file (logior (file-modes file) 128)))
(defun vc-rcs-checkout (file &optional writable rev workfile)
"Retrieve a copy of a saved version of FILE into a workfile."
(let ((filename (or workfile file))
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