From 34ca0f4c796bca424a0e3033b419eb15b79a2f59 Mon Sep 17 00:00:00 2001
From: Xue Fuqiao <xfq.free@gmail.com>
Date: Sat, 5 Oct 2013 07:47:00 +0800
Subject: [PATCH] New functions for finding the administrative directory in VC.

* vc/vc-svn.el (vc-svn-find-admin-dir):
* vc/vc-rcs.el (vc-rcs-find-admin-dir):
* vc/vc-mtn.el (vc-mtn-find-admin-dir):
* vc/vc-cvs.el (vc-cvs-find-admin-dir):
* vc/vc-arch.el (vc-arch-find-admin-dir): New functions.
---
 lisp/ChangeLog     | 8 ++++++++
 lisp/vc/vc-arch.el | 4 ++++
 lisp/vc/vc-cvs.el  | 4 ++++
 lisp/vc/vc-mtn.el  | 3 +++
 lisp/vc/vc-rcs.el  | 4 ++++
 lisp/vc/vc-svn.el  | 4 ++++
 lisp/vc/vc.el      | 4 ++++
 7 files changed, 31 insertions(+)

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 2f996cba224..427c7394bff 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,11 @@
+2013-10-04  Xue Fuqiao  <xfq.free@gmail.com>
+
+	* vc/vc-svn.el (vc-svn-find-admin-dir):
+	* vc/vc-rcs.el (vc-rcs-find-admin-dir):
+	* vc/vc-mtn.el (vc-mtn-find-admin-dir):
+	* vc/vc-cvs.el (vc-cvs-find-admin-dir):
+	* vc/vc-arch.el (vc-arch-find-admin-dir): New functions.
+
 2013-10-04  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* textmodes/css-mode.el (css-smie-rules): Toplevel's a list (bug#15467).
diff --git a/lisp/vc/vc-arch.el b/lisp/vc/vc-arch.el
index e9c65b49202..6ef66f2402a 100644
--- a/lisp/vc/vc-arch.el
+++ b/lisp/vc/vc-arch.el
@@ -227,6 +227,10 @@ Only the value `maybe' can be trusted :-(."
 	  (vc-file-setprop
 	   file 'arch-root root)))))
 
+(defun vc-arch-find-admin-dir (file)
+  "Return the administrative directory of FILE."
+  (expand-file-name "{arch}" (vc-arch-root file)))
+
 (defun vc-arch-register (files &optional rev _comment)
   (if rev (error "Explicit initial revision not supported for Arch"))
   (dolist (file files)
diff --git a/lisp/vc/vc-cvs.el b/lisp/vc/vc-cvs.el
index 57e23aba4d9..db3895ccbd1 100644
--- a/lisp/vc/vc-cvs.el
+++ b/lisp/vc/vc-cvs.el
@@ -1226,6 +1226,10 @@ is non-nil."
                    table (lambda () (vc-cvs-revision-table (car files))))))
     table))
 
+(defun vc-cvs-find-admin-dir (file)
+  "Return the administrative directory of FILE."
+  (vc-find-root file "CVS"))
+
 (defun vc-cvs-ignore (file &optional _directory _remove)
   "Ignore FILE under CVS."
   (vc-cvs-append-to-ignore (file-name-directory file) file))
diff --git a/lisp/vc/vc-mtn.el b/lisp/vc/vc-mtn.el
index 56536a26b41..22e4004d49b 100644
--- a/lisp/vc/vc-mtn.el
+++ b/lisp/vc/vc-mtn.el
@@ -86,6 +86,9 @@ If nil, use the value of `vc-diff-switches'.  If t, use no switches."
       (vc-file-setprop file 'vc-mtn-root
                        (vc-find-root file vc-mtn-admin-format))))
 
+(defun vc-mtn-find-admin-dir (file)
+  "Return the administrative directory of FILE."
+  (expand-file-name vc-mtn-admin-dir (vc-mtn-root file)))
 
 (defun vc-mtn-registered (file)
   (let ((root (vc-mtn-root file)))
diff --git a/lisp/vc/vc-rcs.el b/lisp/vc/vc-rcs.el
index ef1ae8294b2..618250dedab 100644
--- a/lisp/vc/vc-rcs.el
+++ b/lisp/vc/vc-rcs.el
@@ -593,6 +593,10 @@ files beneath it."
                        (and newvers (concat "-r" newvers)))
                  (vc-switches 'RCS 'diff))))
 
+(defun vc-rcs-find-admin-dir (file)
+  "Return the administrative directory of FILE."
+  (vc-find-root file "RCS"))
+
 (defun vc-rcs-comment-history (file)
   "Return a string with all log entries stored in BACKEND for FILE."
   (with-current-buffer "*vc*"
diff --git a/lisp/vc/vc-svn.el b/lisp/vc/vc-svn.el
index 36f27548123..1fd51dd2148 100644
--- a/lisp/vc/vc-svn.el
+++ b/lisp/vc/vc-svn.el
@@ -361,6 +361,10 @@ FILE is a file wildcard, relative to the root directory of DIRECTORY."
   "Return the list of ignored files."
   )
 
+(defun vc-svn-find-admin-dir (file)
+  "Return the administrative directory of FILE."
+  (expand-file-name vc-svn-admin-directory (vc-svn-root file)))
+
 (defun vc-svn-checkout (file &optional editable rev)
   (message "Checking out %s..." file)
   (with-current-buffer (or (get-file-buffer file) (current-buffer))
diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index 69098efc50b..13f0d836f91 100644
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -347,6 +347,10 @@
 ;;
 ;;   Mark conflicts as resolved.  Some VC systems need to run a
 ;;   command to mark conflicts as resolved.
+;;
+;; - find-admin-dir (file)
+;;
+;;   Return the administrative directory of FILE.
 
 ;; HISTORY FUNCTIONS
 ;;
-- 
2.39.2