VCS - Library for generic Version Control System access in Perl


    use VCS;
    $file = VCS::File->new($ARGV[0]);
    print $file->url, ":\n";
    for $version ($file->versions) {
        print $version->version,
              ' was checked in by ',


VCS is an API for abstracting access to all version control systems from Perl code. This is achieved in a similar fashion to the DBI suite of modules. There are "container" classes, VCS::Dir, VCS::File, and VCS::Version, and "implementation" classes, such as VCS::Cvs::Dir, VCS::Cvs::File, and VCS::Cvs::Version, which are subclasses of their respective "container" classes.

The container classes are instantiated with URLs. There is a URL scheme for entities under version control. The format is as follows:


The "query" part is ignored for now. The path must be an absolute path, meaningful to the given class. The class is an implementation class, such as VCS::Cvs.

The "container" classes work as follows: when the new method of a container class is called, it will parse the given URL, using the VCS->parse_url method. It will then call the new of the implementation's appropriate container subclass, and return the result. For example,


will return a VCS::Cvs::Version.

An implementation class is recognised as follows: its name starts with VCS::, and require "VCS/" will load the appropriate implementation classes corresponding to the container classes.



This returns a four-element list:

    ($hostname, $classname, $path, $query)

For example,


will return


This is mostly intended for use by the container classes, and its interface is subject to change.


This loads its given implementation class.

This is mostly intended for use by the container classes, and its interface is subject to change.


Please refer to the documentation for VCS::Dir, VCS::File, and VCS::Version; as well as the implementation specific documentation as in VCS::Cvs, VCS::Rcs.

AVAILABILITY and its friends are available from CPAN. There is a web page at:

as well as a sourceforge project page at:


There is currently a mailing list about VCS. Go to the following webpage to subscribe to it:

There is a web archive of the mailing list at:

General queries should be made directly to the mailing list.


Greg McCarroll <> Leon Brocard


Thanks to Slaven Rezic for a patch.


Copyright (c) 1998-2003 Leon Brocard & Greg McCarroll. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


VCS::Cvs, VCS::Dir, VCS::File, VCS::Rcs, VCS::Version.