Perl::Critic::Policy::Modules::RequireVersionVar
Every Perl file (modules, libraries, and programs) should have a $VERSION variable. The $VERSION allows clients to insist on a particular revision of your file like this:
$VERSION
use SomeModule 2.4; #Only loads version 2.4
This Policy scans your file for any package variable named $VERSION. I'm assuming that you are using strict, so you'll have to declare it like one of these:
strict
our $VERSION = 1.01; $MyPackage::VERSION = 1.01; use vars qw($VERSION);
A common practice is to use the $Revision: 809 $ keyword to automatically define the $VERSION variable like this:
$Revision: 809 $
our ($VERSION) = '$Revision: 809 $' =~ m{ \$Revision: \s+ (\S+) }x;
Conway recommends using the version pragma instead of raw numbers or 'v-strings.' However, this Policy only insists that the $VERSION be defined somehow. I may try to extend this in the future.
version
Jeffrey Ryan Thalhammer <thaljef@cpan.org>
Copyright (c) 2005-2006 Jeffrey Ryan Thalhammer. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license can be found in the LICENSE file included with this module.
To install Perl::Critic, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Perl::Critic
CPAN shell
perl -MCPAN -e shell install Perl::Critic
For more information on module installation, please visit the detailed CPAN module installation guide.