VCS::Lite::Shell - Non OO wrapper for VCS::Lite::Repository


  use VCS::Lite::Shell;
  store('current' => 'YAML');
  store('parent' => 'YAML');
  check_in("Add to repository");


This module is a thin wrapper for the object orientated calls to methods and repositories. It is aimed at programmers who don't want to embrace the fullness of Perl-OO that is used in VCS::Lite::Repository. The aim is to provide the full functionality of the VCS Lite repository via exportable subs. This interface is used by the VCShell command shell.

The module retains a context of the current repository store and current working directory. Move around with chdir, and the subroutines will operate on the current working directory and the contents thereof.

The functions check_out, commit and update operate on a pair of repository trees: the current repository and parent repository.



The first example adds the file to the current repository. The second example adds 01_basic.t to the repository t, having first added the repository t to the current repository if this was necessary.



The opposite operation to add is remove. Note that this does not get rid of the file from the directory, nor the element information. It merely removes from the list of elements in the current repository.


  check_in('', description => 'Fix foo bugs');
  check_in('.', description => 'Prepare version 0.01 for release');

Checking in an element stores the contents of the file into the element store. If the contents of the file is different from what was in the store already, a new generation of the element is created; if the contents is identical, no new generation is created.

Checking in a repository has two effects: any transactions to the repository, i.e. adds and removes, are committed to the repository's transaction history, and the check_in is applied recursively to everything (now) in the repository.


  print fetch('');
  my $old_foo = fetch('', 1);   # Generation 1 of

Fetch returns a scalar containing the contents of an element. The second parameter is the generation number, which defaults to the latest one.


  print diff (file1 => '');  # between latest checked in and outside
  print diff (file1 => '', gen1 => 1, gen2 => 3);
  print diff (file1 => '', file2 => '', gen2 => 'latest');

Diff returns the udiff output (similar to diff -u) between two generations, or between a generation and the file outside. The parameter file1 is mandatory, all others are optional. The parameter file2 defaults to the value of file1; gen1 defaults to the latest generation of file1.

If no gen2 is specified, diff uses the file file2 outside the repository (file1 if no file2 is specified). If you want diff to use the latest generation of file2 instead, specify gen2 as 'latest'.


Please report bugs to



        I. Williams


This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.