* Handling with Getopt parser implemented as strategy pattern.

[gitmo/MooseX-Getopt.git] / lib / MooseX / Getopt / Parser / Descriptive.pm

package MooseX::Getopt::Parser::Descriptive;

use Moose;

with 'MooseX::Getopt::Parser';

use Getopt::Long::Descriptive;

sub getoptions {
    my ($class, $opt_spec) = @_;
    return Getopt::Long::Descriptive::describe_options($class->_usage_format, @$opt_spec);
}

sub _get_getopt_spec {
    my ($class, %params) = @_;

    my (@options, %name_to_init_arg );

    my $constructor_params = $params{params};

    foreach my $opt ( @{ $params{options} } ) {
        push @options, [
            $opt->{opt_string},
            $opt->{doc} || ' ', # FIXME new GLD shouldn't need this hack
            {
                ( ( $opt->{required} && !exists($constructor_params->{$opt->{init_arg}}) ) ? (required => $opt->{required}) : () ),
                # NOTE:
                # remove this 'feature' because it didn't work 
                # all the time, and so is better to not bother
                # since Moose will handle the defaults just 
                # fine anyway.
                # - SL
                #( exists $opt->{default}  ? (default  => $opt->{default})  : () ),
            },
        ];

        my $identifier = $opt->{name};
        $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names

        $name_to_init_arg{$identifier} = $opt->{init_arg};
    }

    return ( \@options, \%name_to_init_arg );
}

sub _usage_format {
    return "usage: %c %o";
}

1;