patch for documentation about version control

[Alex Ott <ott@jet.msk.su>]

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Hi all

this patch add some docs about version control systems supported by vc.


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Index: man/files.texi
===================================================================
RCS file: /cvsroot/emacs/emacs/man/files.texi,v
retrieving revision 1.91
diff -u -w -b -B -r1.91 files.texi
--- man/files.texi	9 Oct 2004 18:41:18 -0000	1.91
+++ man/files.texi	9 Nov 2004 06:57:21 -0000
@@ -1119,11 +1119,12 @@
 description of what was changed in that version.
 
   The Emacs version control interface is called VC.  Its commands work
-with three version control systems---RCS, CVS, and SCCS.  The GNU
-project recommends RCS and CVS, which are free software and available
-from the Free Software Foundation.  We also have free software to
-replace SCCS, known as CSSC; if you are using SCCS and don't want to
-make the incompatible change to RCS or CVS, you can switch to CSSC.
+with different version control systems---RCS, CVS, SCCS, Meta-CVS, GNU
+Arch and Subversion.  The GNU project recommends RCS, CVS, and GNU Arch
+which are free software and available from the Free Software Foundation.
+We also have free software to replace SCCS, known as CSSC; if you are
+using SCCS and don't want to make the incompatible change to RCS or CVS,
+you can switch to CSSC.
 
   VC is enabled by default in Emacs.  To disable it, set the
 customizable variable @code{vc-handled-backends} to @code{nil}
@@ -1166,8 +1167,9 @@
 
 @cindex RCS
 @cindex back end (version control)
-  VC currently works with three different version control systems or
-``back ends'': RCS, CVS, and SCCS.
+  VC currently works with six different version control systems or
+``back ends'': RCS, CVS, SCCS, MCVS (Meta-CVS), Arch (GNU Arch) and SVN
+(Subversion).
 
   RCS is a free version control system that is available from the Free
 Software Foundation.  It is perhaps the most mature of the supported
@@ -1190,6 +1192,33 @@
 features, such as multiple branches, are not available with SCCS.  You
 should use SCCS only if for some reason you cannot use RCS.
 
+@cindex MCVS
+@cindex Meta-CVS
+
+Meta-CVS is another attempt to solve problems, arising in CVS.  It
+supports directory structure versioning, improved branching and merging,
+and use of symbolic links and meta-data in repositories.
+
+@cindex GNU Arch
+@cindex Arch
+  GNU Arch is new version control system that designed for distributed
+work.  It differs in many ways from old well-known systems, such as CVS
+and RCS.  It supports different transports for interoperating between
+users, offline operations and have good branching and merging features.
+It also supports atomic commits, and history of file renaming and
+moving.  VC supports not all operations, provided by GNU Arch, so you
+can call their from command line, or use specialized module.
+
+@cindex SVN
+@cindex Subversion
+  Subversion is version control system, that was designed for eliminate
+problems, that arrive with CVS usage, such as nonatomic commits, and
+losing history of file with renaming or moving file.  It also could be
+used via http or other standard protocols.  SVN has almost same concepts
+as CVS, but solve some problems.  Switching from CVS to SVN is very
+easy---just use @command{svn} command instead @command{cvs}.
+
+
 @node VC Concepts
 @subsubsection Concepts of Version Control
 

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-- 
With best wishes, Alex Ott
Jet Infosystems,       http://www.jetinfosoft.ru/
                       +7 (095) 411 76 01

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