I cheat, personally. I have a program which loads all of its contents from an XML file. I think I've got this down the bare minimum required to be a useful example. (there's a few different type of config parameters, not all of which get exported, and logic for adding new values)
package Physics::Solar::VSO::Config;
use strict;
use warnings;
our $VERSION = 1.01_04;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = ();
# @EXPORT_OK is below.
use XML::Simple;
my $parserOptions = {
cache => [ 'memshare' ],
NoAttr => 1,
SuppressEmpty => undef,
};
( my $configFile = __FILE__ ) =~ s/\.pm$/.xml/;
my $config ||= XMLin( $configFile, %$parserOptions );
our %CONFIG : unique = ( %{ $config->{'CONFIG'} || {} } );
sub AUTOLOAD {
(my $constant = our $AUTOLOAD) =~ s/^.*://;
no strict 'refs';
if (exists($CONFIG{$constant})) {
*{$AUTOLOAD} = sub { return $CONFIG{$constant} };
return &{$AUTOLOAD};
} else {
require Carp;
Carp::croak "Unknown constant : $constant";
}
}
@Physics::Solar::VSO::Config::EXPORT_OK = ( keys %CONFIG );
Update: You'd of course want to swap EXPORT_OK and EXPORT, so you don't have to pass in which constants you wanted to import (also cleaned up a typo, and split a paragrah)
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