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.\"
.IX Title "MooseX::App::Plugin::Depends 3pm"
.TH MooseX::App::Plugin::Depends 3pm "2017-10-02" "perl v5.26.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
MooseX::App::Plugin::Depends \- Adds dependent options
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
In your base class:
.PP
.Vb 2
\& package MyApp;
\& use MooseX::App qw(Depends);
\& 
\& use Moose::Util::TypeConstraints;
\&
\& option \*(AqFileFormat\*(Aq => (
\&   is  => \*(Aqro\*(Aq,
\&   isa => enum( [qw(tsv csv xml)] ),
\& );
\&
\& option \*(AqWriteToFile\*(Aq => (
\&   is       => \*(Aqro\*(Aq,
\&   isa      => \*(AqBool\*(Aq,
\&   depends => [qw(FileFormat)],
\& );
.Ve
.PP
In your script:
.PP
.Vb 1
\& #!/usr/bin/env perl
\&
\& use strict;
\& use warnings;
\&
\& use MyApp;
\&
\& MyApp\->new_with_options( WriteToFile => 1 );
\& # generates Error
\& # Option \*(AqWriteToFile\*(Aq requires \*(AqFileFormat\*(Aq to be defined
\&
\& MyApp\->new_with_options( WriteToFile => 1, FileFormat => \*(Aqtsv );
\& # generates no errors
\&
\& MyApp\->new_with_options();
\& # generates no errors
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In many real-world scenarios, sets of options are, by design, needed to be
specified together. This plugin adds the ability to create dependent options
to your application, options that require one or more other options
for your application to perform properly.