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package Bio::Root::Version;
use strict;
package Bio::Tools::NiftyFeature;
require Bio::Root::RootI;
# later, in client code:
package main;
use Bio::Tools::NiftyFeature 3.14;
## alternative usage: NiftyFeature defines own $VERSION:
package Bio::Tools::NiftyFeature;
my $VERSION = 9.8;
# later in client code:
package main;
# ensure we're using an up-to-date BioPerl distribution
use Bio::Perl 3.14;
# NiftyFeature has its own versioning scheme:
use Bio::Tools::NiftyFeature 9.8;
This module provides a mechanism by which all other BioPerl modules
can share the same $VERSION, without manually synchronizing each file.
Bio::Root::RootI itself uses this module, so any module that directly
(or indirectly) uses Bio::Root::RootI will get a global $VERSION
variable set if it's not already.
=head1 AUTHOR Aaron Mackey
our $VERSION = '1.006925'; # pre-1.7
sub import {
# try to handle multiple levels of inheritance:
my $i = 0;
my $pkg = caller($i);
no strict 'refs';
while ($pkg) {
if ( $pkg =~ m/^Bio::/o
and not defined ${$pkg . "::VERSION"}
) {
${$pkg . "::VERSION"} = $VERSION;
$pkg = caller(++$i);
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