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package MooseX::App::Plugin::MutexGroup;
use Moose::Role;
use namespace::autoclean;
sub plugin_metaroles {
my ($self, $class) = @_;
return {
attribute => ['MooseX::App::Plugin::MutexGroup::Meta::Attribute'],
class => ['MooseX::App::Plugin::MutexGroup::Meta::Class'],
}
}
1;
__END__
=encoding utf8
=head1 NAME
MooseX::App::Plugin::MutexGroup - Adds mutually exclusive options
=head1 SYNOPSIS
In your base class:
package MyApp;
use MooseX::App qw(MutexGroup);
option 'UseAmmonia' => (
is => 'ro',
isa => 'Bool',
mutexgroup => 'NonMixableCleaningChemicals',
);
option 'UseChlorine' => (
is => 'ro',
isa => 'Bool',
mutexgroup => 'NonMixableCleaningChemicals'
);
In your script:
#!/usr/bin/env perl
use strict;
use warnings;
use MyApp;
MyApp->new_with_options( UseAmmonia => 1, UseChlorine => 1 );
# generates Error
# More than one attribute from mutexgroup NonMixableCleaningChemicals('UseAmmonia','UseChlorine') *cannot* be specified
MyApp->new_with_options();
# generates Error
# One attribute from mutexgroup NonMixableCleaningChemicals('UseAmmonia','UseChlorine') *must* be specified
MyApp->new_with_options( UseAmmonia => 1 );
# generates no errors
MyApp->new_with_options( UseChlorine => 1 );
# generates no errors
=head1 DESCRIPTION
This plugin adds mutually exclusive options to your application. In the current implementation, all defined
MutexGroups *must* have exactly one initialized option. This means that there is an implicit requiredness
of one option from each MutexGroup.
=cut
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