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[Emacs-diffs] Changes to emacs/lisp/vc-mcvs.el [lexbind]


From: Miles Bader
Subject: [Emacs-diffs] Changes to emacs/lisp/vc-mcvs.el [lexbind]
Date: Tue, 14 Oct 2003 19:52:33 -0400

Index: emacs/lisp/vc-mcvs.el
diff -c /dev/null emacs/lisp/vc-mcvs.el:1.11.2.1
*** /dev/null   Tue Oct 14 19:52:33 2003
--- emacs/lisp/vc-mcvs.el       Tue Oct 14 19:51:27 2003
***************
*** 0 ****
--- 1,625 ----
+ ;;; vc-mcvs.el --- VC backend for the Meta-CVS version-control system
+ 
+ ;; Copyright (C) 1995,98,99,2000,01,02,2003  Free Software Foundation, Inc.
+ 
+ ;; Author:      FSF (see vc.el for full credits)
+ ;; Maintainer:  Stefan Monnier <address@hidden>
+ 
+ ;; 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 2, 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; see the file COPYING.  If not, write to the
+ ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, USA.
+ 
+ ;;; Commentary:
+ 
+ ;; The home page of the Meta-CVS version control system is at
+ ;; 
+ ;;      http://users.footprints.net/~kaz/mcvs.html
+ ;; 
+ ;; This is derived from vc-cvs.el as follows:
+ ;; - cp vc-cvs.el vc-mcvs.el
+ ;; - Replace CVS/ with MCVS/CVS/
+ ;; - Replace 'CVS with 'MCVS
+ ;; - Replace -cvs- with -mcvs-
+ ;; - Replace most of the rest of CVS to Meta-CVS
+ ;;
+ ;; Then of course started the hacking.  Only a small part of the code
+ ;; has been touched and not much more than that was tested, so if
+ ;; you bump into a bug, don't be surprised: just report it to me.
+ ;;
+ ;; What has been partly tested:
+ ;; - C-x v v to start editing a file that was checked out with CVSREAD on.
+ ;; - C-x v v to commit a file
+ ;; - C-x v =
+ ;; - C-x v l
+ ;; - C-x v i
+ ;; - C-x v g
+ ;; - M-x vc-rename-file RET
+ 
+ ;;; Bugs:
+ 
+ ;; - Retrieving snapshots doesn't filter `cvs update' output and thus
+ ;;   parses bogus filenames.  Don't know if it harms.
+ 
+ ;;; Code:
+ 
+ (eval-when-compile (require 'vc))
+ (require 'vc-cvs)
+ 
+ ;;;
+ ;;; Customization options
+ ;;;
+ 
+ (defcustom vc-mcvs-global-switches nil
+   "*Global switches to pass to any Meta-CVS command."
+   :type '(choice (const :tag "None" nil)
+                (string :tag "Argument String")
+                (repeat :tag "Argument List"
+                        :value ("")
+                        string))
+   :version "21.4"
+   :group 'vc)
+ 
+ (defcustom vc-mcvs-register-switches nil
+   "*Extra switches for registering a file into Meta-CVS.
+ A string or list of strings passed to the checkin program by
+ \\[vc-register]."
+   :type '(choice (const :tag "None" nil)
+                (string :tag "Argument String")
+                (repeat :tag "Argument List"
+                        :value ("")
+                        string))
+   :version "21.4"
+   :group 'vc)
+ 
+ (defcustom vc-mcvs-diff-switches nil
+   "*A string or list of strings specifying extra switches for cvs diff under 
VC."
+     :type '(choice (const :tag "None" nil)
+                (string :tag "Argument String")
+                (repeat :tag "Argument List"
+                        :value ("")
+                        string))
+   :version "21.4"
+   :group 'vc)
+ 
+ (defcustom vc-mcvs-header (or (cdr (assoc 'MCVS vc-header-alist))
+                             vc-cvs-header)
+   "*Header keywords to be inserted by `vc-insert-headers'."
+   :version "21.4"
+   :type '(repeat string)
+   :group 'vc)
+ 
+ (defcustom vc-mcvs-use-edit vc-cvs-use-edit
+   "*Non-nil means to use `cvs edit' to \"check out\" a file.
+ This is only meaningful if you don't use the implicit checkout model
+ \(i.e. if you have $CVSREAD set)."
+   :type 'boolean
+   :version "21.4"
+   :group 'vc)
+ 
+ ;;;
+ ;;; State-querying functions
+ ;;;
+ 
+ ;;;###autoload (defun vc-mcvs-registered (file)
+ ;;;###autoload   (let ((dir file))
+ ;;;###autoload     (while (and (stringp dir)
+ ;;;###autoload                 (not (equal
+ ;;;###autoload                       dir (setq dir (file-name-directory 
dir))))
+ ;;;###autoload                 dir)
+ ;;;###autoload       (setq dir (if (file-directory-p
+ ;;;###autoload                      (expand-file-name "MCVS/CVS" dir))
+ ;;;###autoload                     t (directory-file-name dir))))
+ ;;;###autoload     (if (eq dir t)
+ ;;;###autoload          (progn
+ ;;;###autoload           (load "vc-mcvs")
+ ;;;###autoload           (vc-mcvs-registered file)))))
+ 
+ (defun vc-mcvs-root (file)
+   "Return the root directory of a Meta-CVS project, if any."
+   (or (vc-file-getprop file 'mcvs-root)
+       (vc-file-setprop
+        file 'mcvs-root
+        (let ((root nil))
+        (while (not (or root
+                        (equal file (setq file (file-name-directory file)))
+                        (null file)))
+          (if (file-directory-p (expand-file-name "MCVS/CVS" file))
+              (setq root file)
+            (setq file (directory-file-name file))))
+        root))))
+ 
+ (defun vc-mcvs-read (file)
+   (if (file-readable-p file)
+       (with-temp-buffer
+       (insert-file-contents file)
+       (goto-char (point-min))
+       (read (current-buffer)))))
+ 
+ (defun vc-mcvs-map-file (dir file)
+   (let ((map (vc-mcvs-read (expand-file-name "MCVS/MAP" dir)))
+       inode)
+     (dolist (x map inode)
+       (if (equal (nth 2 x) file) (setq inode (nth 1 x))))))
+ 
+ (defun vc-mcvs-registered (file)
+   (let (root inode cvsfile)
+     (when (and (setq root (vc-mcvs-root file))
+              (setq inode (vc-mcvs-map-file
+                           root (file-relative-name file root))))
+       (vc-file-setprop file 'mcvs-inode inode)
+       ;; Avoid calling `mcvs diff' in vc-workfile-unchanged-p.
+       (vc-file-setprop file 'vc-checkout-time
+                      (if (vc-cvs-registered
+                           (setq cvsfile (expand-file-name inode root)))
+                          (vc-file-getprop cvsfile 'vc-checkout-time)
+                        ;; The file might not be registered yet because
+                        ;; of lazy-adding.
+                        0))
+       t)))
+ 
+ (defmacro vc-mcvs-cvs (op file &rest args)
+   (declare (debug t))
+   `(,(intern (concat "vc-cvs-" (symbol-name op)))
+     (expand-file-name (vc-file-getprop ,file 'mcvs-inode)
+                     (vc-file-getprop ,file 'mcvs-root))
+     ,@args))
+ 
+ (defun vc-mcvs-state (file)
+   ;; This would assume the Meta-CVS sandbox is synchronized.
+   ;; (vc-mcvs-cvs state file))
+   "Meta-CVS-specific version of `vc-state'."
+   (if (vc-stay-local-p file)
+       (let ((state (vc-file-getprop file 'vc-state)))
+         ;; If we should stay local, use the heuristic but only if
+         ;; we don't have a more precise state already available.
+       (if (memq state '(up-to-date edited))
+           (vc-mcvs-state-heuristic file)
+         state))
+     (with-temp-buffer
+       (setq default-directory (vc-mcvs-root file))
+       (vc-mcvs-command t 0 file "status")
+       (vc-cvs-parse-status t))))
+ 
+ 
+ (defalias 'vc-mcvs-state-heuristic 'vc-cvs-state-heuristic)
+ 
+ (defun vc-mcvs-dir-state (dir)
+   "Find the Meta-CVS state of all files in DIR."
+   ;; if DIR is not under Meta-CVS control, don't do anything.
+   (when (file-readable-p (expand-file-name "MCVS/CVS/Entries" dir))
+     (if (vc-stay-local-p dir)
+       (vc-mcvs-dir-state-heuristic dir)
+       (let ((default-directory dir))
+       ;; Don't specify DIR in this command, the default-directory is
+       ;; enough.  Otherwise it might fail with remote repositories.
+       (with-temp-buffer
+         (setq default-directory (vc-mcvs-root dir))
+         (vc-mcvs-command t 0 nil "status" "-l")
+         (goto-char (point-min))
+         (while (re-search-forward "^=+\n\\([^=\n].*\n\\|\n\\)+" nil t)
+           (narrow-to-region (match-beginning 0) (match-end 0))
+           (vc-cvs-parse-status)
+           (goto-char (point-max))
+           (widen)))))))
+ 
+ (defun vc-mcvs-workfile-version (file) (vc-mcvs-cvs workfile-version file))
+ 
+ (defalias 'vc-mcvs-checkout-model 'vc-cvs-checkout-model)
+ 
+ (defun vc-mcvs-mode-line-string (file)
+   (let ((s (vc-mcvs-cvs mode-line-string file)))
+     (when s
+       (if (and (not (memq (vc-state file) '(up-to-date needs-patch)))
+              (string-match "\\`CVS-" s))
+         ;; The CVS file is not in sync, so we need to adjust the state.
+         (concat "MCVS:" (substring s 4))
+       (concat "M" s)))))
+ 
+ ;;;
+ ;;; State-changing functions
+ ;;;
+ 
+ (defun vc-mcvs-register (file &optional rev comment)
+   "Register FILE into the Meta-CVS version-control system.
+ COMMENT can be used to provide an initial description of FILE.
+ 
+ `vc-register-switches' and `vc-mcvs-register-switches' are passed to
+ the Meta-CVS command (in that order)."
+   (let* ((filename (file-name-nondirectory file))
+        (extpos (string-match "\\." filename))
+        (ext (if extpos (substring filename (1+ extpos))))
+        (root (vc-mcvs-root file))
+        (types-file (expand-file-name "MCVS/TYPES" root))
+        (map-file (expand-file-name "MCVS/MAP" root))
+        (types (vc-mcvs-read types-file)))
+     ;; Make sure meta files like MCVS/MAP are not read-only (happens with
+     ;; CVSREAD) since Meta-CVS doesn't pay attention to it at all and goes
+     ;; belly-up.
+     (unless (file-writable-p map-file)
+       (vc-checkout map-file t))
+     (unless (or (file-writable-p types-file) (not (file-exists-p types-file)))
+       (vc-checkout types-file t))
+     ;; Make sure the `mcvs add' will not fire up the CVSEDITOR
+     ;; to add a rule for the given file's extension.
+     (when (and ext (not (assoc ext types)))
+       (let ((type (completing-read "Type to use [default]: "
+                                  '("default" "name-only" "keep-old"
+                                    "binary" "value-only")
+                                  nil t nil nil "default")))
+       (push (list ext (make-symbol (upcase (concat ":" type)))) types)
+       (setq types (sort types (lambda (x y) (string< (car x) (car y)))))
+       (with-current-buffer (find-file-noselect types-file)
+         (erase-buffer)
+         (pp types (current-buffer))
+         (save-buffer)
+         (unless (get-buffer-window (current-buffer) t)
+           (kill-buffer (current-buffer)))))))
+   ;; Now do the ADD.
+   (prog1 (apply 'vc-mcvs-command nil 0 file
+               "add"
+               (and comment (string-match "[^\t\n ]" comment)
+                    (concat "-m" comment))
+               (vc-switches 'MCVS 'register))
+     ;; I'm not sure exactly why, but if we don't setup the inode and root
+     ;; prop of the file, things break later on in vc-mode-line that
+     ;; ends up calling vc-mcvs-workfile-version.
+     ;; We also need to set vc-checkout-time so that vc-workfile-unchanged-p
+     ;; doesn't try to call `mcvs diff' on the file.
+     (vc-mcvs-registered file)))
+ 
+ (defalias 'vc-mcvs-responsible-p 'vc-mcvs-root
+   "Return non-nil if CVS thinks it is responsible for FILE.")
+ 
+ (defalias 'vc-cvs-could-register 'vc-cvs-responsible-p
+   "Return non-nil if FILE could be registered in Meta-CVS.
+ This is only possible if Meta-CVS is responsible for FILE's directory.")
+ 
+ (defun vc-mcvs-checkin (file rev comment)
+   "Meta-CVS-specific version of `vc-backend-checkin'."
+   (unless (or (not rev) (vc-mcvs-valid-version-number-p rev))
+     (if (not (vc-mcvs-valid-symbolic-tag-name-p rev))
+       (error "%s is not a valid symbolic tag name" rev)
+       ;; If the input revision is a valid symbolic tag name, we create it
+       ;; as a branch, commit and switch to it.
+       ;; This file-specific form of branching is deprecated.
+       ;; We can't use `mcvs branch' and `mcvs switch' because they cannot
+       ;; be applied just to this one file.
+       (apply 'vc-mcvs-command nil 0 file "tag" "-b" (list rev))
+       (apply 'vc-mcvs-command nil 0 file "update" "-r" (list rev))
+       (vc-file-setprop file 'vc-mcvs-sticky-tag rev)
+       (setq rev nil)))
+   ;; This commit might cvs-commit several files (e.g. MAP and TYPES)
+   ;; so using numbered revs here is dangerous and somewhat meaningless.
+   (when rev (error "Cannot commit to a specific revision number"))
+   (let ((status (apply 'vc-mcvs-command nil 1 file
+                      "ci" "-m" comment
+                      (vc-switches 'MCVS 'checkin))))
+     (set-buffer "*vc*")
+     (goto-char (point-min))
+     (when (not (zerop status))
+       ;; Check checkin problem.
+       (cond
+        ((re-search-forward "Up-to-date check failed" nil t)
+         (vc-file-setprop file 'vc-state 'needs-merge)
+         (error (substitute-command-keys
+                 (concat "Up-to-date check failed: "
+                         "type \\[vc-next-action] to merge in changes"))))
+        (t
+         (pop-to-buffer (current-buffer))
+         (goto-char (point-min))
+         (shrink-window-if-larger-than-buffer)
+         (error "Check-in failed"))))
+     ;; Update file properties
+     (vc-file-setprop
+      file 'vc-workfile-version
+      (vc-parse-buffer "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" 2))
+     ;; Forget the checkout model of the file, because we might have
+     ;; guessed wrong when we found the file.  After commit, we can
+     ;; tell it from the permissions of the file (see
+     ;; vc-mcvs-checkout-model).
+     (vc-file-setprop file 'vc-checkout-model nil)
+ 
+     ;; if this was an explicit check-in (does not include creation of
+     ;; a branch), remove the sticky tag.
+     (if (and rev (not (vc-mcvs-valid-symbolic-tag-name-p rev)))
+       (vc-mcvs-command nil 0 file "update" "-A"))))
+ 
+ (defun vc-mcvs-find-version (file rev buffer)
+   (apply 'vc-mcvs-command
+        buffer 0 file
+        "-Q"                           ; suppress diagnostic output
+        "update"
+        (and rev (not (string= rev ""))
+             (concat "-r" rev))
+        "-p"
+        (vc-switches 'MCVS 'checkout)))
+ 
+ (defun vc-mcvs-checkout (file &optional editable rev)
+   (message "Checking out %s..." file)
+   (with-current-buffer (or (get-file-buffer file) (current-buffer))
+     (vc-call update file editable rev (vc-switches 'MCVS 'checkout)))
+   (vc-mode-line file)
+   (message "Checking out %s...done" file))
+ 
+ (defun vc-mcvs-update (file editable rev switches)
+   (if (and (file-exists-p file) (not rev))
+       ;; If no revision was specified, just make the file writable
+       ;; if necessary (using `cvs-edit' if requested).
+       (and editable (not (eq (vc-mcvs-checkout-model file) 'implicit))
+          (if vc-mcvs-use-edit
+              (vc-mcvs-command nil 0 file "edit")
+            (set-file-modes file (logior (file-modes file) 128))
+            (if (equal file buffer-file-name) (toggle-read-only -1))))
+     ;; Check out a particular version (or recreate the file).
+     (vc-file-setprop file 'vc-workfile-version nil)
+     (apply 'vc-mcvs-command nil 0 file
+          (if editable "-w")
+          "update"
+          ;; default for verbose checkout: clear the sticky tag so
+          ;; that the actual update will get the head of the trunk
+          (if (or (not rev) (string= rev ""))
+              "-A"
+            (concat "-r" rev))
+          switches)))
+ 
+ (defun vc-mcvs-rename-file (old new)
+   (vc-mcvs-command nil 0 new "move" (file-relative-name old)))
+ 
+ (defun vc-mcvs-revert (file &optional contents-done)
+   "Revert FILE to the version it was based on."
+   (vc-default-revert file contents-done)
+   (unless (eq (vc-checkout-model file) 'implicit)
+     (if vc-mcvs-use-edit
+         (vc-mcvs-command nil 0 file "unedit")
+       ;; Make the file read-only by switching off all w-bits
+       (set-file-modes file (logand (file-modes file) 3950)))))
+ 
+ (defun vc-mcvs-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-mcvs-command nil 0 file
+                  "update" "-kk"
+                  (concat "-j" first-version)
+                  (concat "-j" second-version))
+   (vc-file-setprop file 'vc-state 'edited)
+   (with-current-buffer (get-buffer "*vc*")
+     (goto-char (point-min))
+     (if (re-search-forward "conflicts during merge" nil t)
+         1                             ; signal error
+       0)))                            ; signal success
+ 
+ (defun vc-mcvs-merge-news (file)
+   "Merge in any new changes made to FILE."
+   (message "Merging changes into %s..." file)
+   ;; (vc-file-setprop file 'vc-workfile-version nil)
+   (vc-file-setprop file 'vc-checkout-time 0)
+   (vc-mcvs-command nil 0 file "update")
+   ;; Analyze the merge result reported by Meta-CVS, and set
+   ;; file properties accordingly.
+   (with-current-buffer (get-buffer "*vc*")
+     (goto-char (point-min))
+     ;; get new workfile version
+     (if (re-search-forward
+        "^Merging differences between [0-9.]* and \\([0-9.]*\\) into" nil t)
+       (vc-file-setprop file 'vc-workfile-version (match-string 1))
+       (vc-file-setprop file 'vc-workfile-version nil))
+     ;; get file status
+     (prog1
+         (if (eq (buffer-size) 0)
+             0 ;; there were no news; indicate success
+           (if (re-search-forward
+                (concat "^\\([CMUP] \\)?"
+                        ".*"
+                        "\\( already contains the differences between \\)?")
+                nil t)
+               (cond
+                ;; Merge successful, we are in sync with repository now
+                ((or (match-string 2)
+                     (string= (match-string 1) "U ")
+                     (string= (match-string 1) "P "))
+                 (vc-file-setprop file 'vc-state 'up-to-date)
+                 (vc-file-setprop file 'vc-checkout-time
+                                  (nth 5 (file-attributes file)))
+                 0);; indicate success to the caller
+                ;; Merge successful, but our own changes are still in the file
+                ((string= (match-string 1) "M ")
+                 (vc-file-setprop file 'vc-state 'edited)
+                 0);; indicate success to the caller
+                ;; Conflicts detected!
+                (t
+                 (vc-file-setprop file 'vc-state 'edited)
+                 1);; signal the error to the caller
+                )
+             (pop-to-buffer "*vc*")
+             (error "Couldn't analyze mcvs update result")))
+       (message "Merging changes into %s...done" file))))
+ 
+ ;;;
+ ;;; History functions
+ ;;;
+ 
+ (defun vc-mcvs-print-log (file)
+   "Get change log associated with FILE."
+   (let ((default-directory (vc-mcvs-root file)))
+     ;; Run the command from the root dir so that `mcvs filt' returns
+     ;; valid relative names.
+     (vc-mcvs-command
+      nil
+      (if (and (vc-stay-local-p file) (fboundp 'start-process)) 'async 0)
+      file "log")))
+ 
+ (defun vc-mcvs-diff (file &optional oldvers newvers)
+   "Get a difference report using Meta-CVS between two versions of FILE."
+   (if (string= (vc-workfile-version file) "0")
+       ;; This file is added but not yet committed; there is no master file.
+       (if (or oldvers newvers)
+         (error "No revisions of %s exist" file)
+       ;; We regard this as "changed".
+       ;; Diff it against /dev/null.
+       ;; Note: this is NOT a "mcvs diff".
+       (apply 'vc-do-command "*vc-diff*"
+              1 "diff" file
+              (append (vc-switches nil 'diff) '("/dev/null")))
+       ;; Even if it's empty, it's locally modified.
+       1)
+     (let* ((async (and (vc-stay-local-p file) (fboundp 'start-process)))
+          ;; Run the command from the root dir so that `mcvs filt' returns
+          ;; valid relative names.
+          (default-directory (vc-mcvs-root file))
+          (status
+           (apply 'vc-mcvs-command "*vc-diff*"
+                  (if async 'async 1)
+                  file "diff"
+                  (and oldvers (concat "-r" oldvers))
+                  (and newvers (concat "-r" newvers))
+                  (vc-switches 'MCVS 'diff))))
+       (if async 1 status))))         ; async diff, pessimistic assumption.
+ 
+ (defun vc-mcvs-diff-tree (dir &optional rev1 rev2)
+   "Diff all files at and below DIR."
+   (with-current-buffer "*vc-diff*"
+     ;; Run the command from the root dir so that `mcvs filt' returns
+     ;; valid relative names.
+     (setq default-directory (vc-mcvs-root dir))
+     ;; cvs diff: use a single call for the entire tree
+     (let ((coding-system-for-read (or coding-system-for-read 'undecided)))
+       (apply 'vc-mcvs-command "*vc-diff*" 1 dir "diff"
+            (and rev1 (concat "-r" rev1))
+            (and rev2 (concat "-r" rev2))
+            (vc-switches 'MCVS 'diff)))))
+ 
+ (defun vc-mcvs-annotate-command (file buffer &optional version)
+   "Execute \"mcvs annotate\" on FILE, inserting the contents in BUFFER.
+ Optional arg VERSION is a version to annotate from."
+   (vc-mcvs-command
+    buffer
+    (if (and (vc-stay-local-p file) (fboundp 'start-process)) 'async 0)
+    file "annotate" (if version (concat "-r" version))))
+ 
+ (defalias 'vc-mcvs-annotate-current-time 'vc-cvs-annotate-current-time)
+ (defalias 'vc-mcvs-annotate-time 'vc-cvs-annotate-time)
+ 
+ ;;;
+ ;;; Snapshot system
+ ;;;
+ 
+ (defun vc-mcvs-create-snapshot (dir name branchp)
+   "Assign to DIR's current version a given NAME.
+ If BRANCHP is non-nil, the name is created as a branch (and the current
+ workspace is immediately moved to that new branch)."
+   (if (not branchp)
+       (vc-mcvs-command nil 0 dir "tag" "-c" name)
+     (vc-mcvs-command nil 0 dir "branch" name)
+     (vc-mcvs-command nil 0 dir "switch" name)))
+ 
+ (defun vc-mcvs-retrieve-snapshot (dir name update)
+   "Retrieve a snapshot at and below DIR.
+ NAME is the name of the snapshot; if it is empty, do a `cvs update'.
+ If UPDATE is non-nil, then update (resynch) any affected buffers."
+   (with-current-buffer (get-buffer-create "*vc*")
+     (let ((default-directory dir)
+         (sticky-tag))
+       (erase-buffer)
+       (if (or (not name) (string= name ""))
+         (vc-mcvs-command t 0 nil "update")
+       (vc-mcvs-command t 0 nil "update" "-r" name)
+       (setq sticky-tag name))
+       (when update
+       (goto-char (point-min))
+       (while (not (eobp))
+         (if (looking-at "\\([CMUP]\\) \\(.*\\)")
+             (let* ((file (expand-file-name (match-string 2) dir))
+                    (state (match-string 1))
+                    (buffer (find-buffer-visiting file)))
+               (when buffer
+                 (cond
+                  ((or (string= state "U")
+                       (string= state "P"))
+                   (vc-file-setprop file 'vc-state 'up-to-date)
+                   (vc-file-setprop file 'vc-workfile-version nil)
+                   (vc-file-setprop file 'vc-checkout-time
+                                    (nth 5 (file-attributes file))))
+                  ((or (string= state "M")
+                       (string= state "C"))
+                   (vc-file-setprop file 'vc-state 'edited)
+                   (vc-file-setprop file 'vc-workfile-version nil)
+                   (vc-file-setprop file 'vc-checkout-time 0)))
+                 (vc-file-setprop file 'vc-mcvs-sticky-tag sticky-tag)
+                 (vc-resynch-buffer file t t))))
+         (forward-line 1))))))
+ 
+ 
+ ;;;
+ ;;; Miscellaneous
+ ;;;
+ 
+ (defalias 'vc-mcvs-make-version-backups-p 'vc-stay-local-p
+   "Return non-nil if version backups should be made for FILE.")
+ (defalias 'vc-mcvs-check-headers 'vc-cvs-check-headers)
+ 
+ 
+ ;;;
+ ;;; Internal functions
+ ;;;
+ 
+ (defun vc-mcvs-command (buffer okstatus file &rest flags)
+   "A wrapper around `vc-do-command' for use in vc-mcvs.el.
+ The difference to vc-do-command is that this function always invokes `mcvs',
+ and that it passes `vc-mcvs-global-switches' to it before FLAGS."
+   (let ((args (append '("--error-terminate")
+                     (if (stringp vc-mcvs-global-switches)
+                         (cons vc-mcvs-global-switches flags)
+                       (append vc-mcvs-global-switches flags)))))
+     (if (not (member (car flags) '("diff" "log" "status")))
+       ;; No need to filter: do it the easy way.
+       (apply 'vc-do-command buffer okstatus "mcvs" file args)
+       ;; We need to filter the output.
+       ;; The output of the filter uses filenames relative to the root,
+       ;; so we need to change the default-directory.
+       (assert (equal default-directory (vc-mcvs-root file)))
+       (vc-do-command
+        buffer okstatus "sh" nil "-c"
+        (concat "mcvs "
+              (mapconcat
+               'shell-quote-argument
+               (append (remq nil args)
+                       (if file (list (file-relative-name file))))
+               " ")
+              " | mcvs filt")))))
+ 
+ (defun vc-mcvs-repository-hostname (dirname)
+   (vc-cvs-repository-hostname (vc-mcvs-root dirname)))
+ 
+ (defun vc-mcvs-dir-state-heuristic (dir)
+   "Find the Meta-CVS state of all files in DIR, using only local information."
+   (with-temp-buffer
+     (vc-cvs-get-entries dir)
+     (goto-char (point-min))
+     (while (not (eobp))
+       ;; Meta-MCVS-removed files are not taken under VC control.
+       (when (looking-at "/\\([^/]*\\)/[^/-]")
+       (let ((file (expand-file-name (match-string 1) dir)))
+         (unless (vc-file-getprop file 'vc-state)
+           (vc-cvs-parse-entry file t))))
+       (forward-line 1))))
+ 
+ (defalias 'vc-mcvs-valid-symbolic-tag-name-p 
'vc-cvs-valid-symbolic-tag-name-p)
+ (defalias 'vc-mcvs-valid-version-number-p 'vc-cvs-valid-version-number-p)
+ 
+ (provide 'vc-mcvs)
+ 
+ ;;; arch-tag: a39c7c1c-5247-429d-88df-dd7187d2e704
+ ;;; vc-mcvs.el ends here




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