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MooseX::Getopt::Meta::Attribute(3) User Contributed Perl Documentation MooseX::Getopt::Meta::Attribute(3)

MooseX::Getopt::Meta::Attribute - Optional meta attribute for custom option names

version 0.75

  package App;
  use Moose;

  with 'MooseX::Getopt';

  has 'data' => (
      metaclass => 'Getopt',
      is        => 'ro',
      isa       => 'Str',
      default   => 'file.dat',

      # tells MooseX::Getopt to use --somedata as the
      # command line flag instead of the normal
      # autogenerated one (--data)
      cmd_flag  => 'somedata',

      # tells MooseX::Getopt to also allow --moosedata,
      # -m, and -d as aliases for this same option on
      # the commandline.
      cmd_aliases => [qw/ moosedata m d /],

      # Or, you can use a plain scalar for a single alias:
      cmd_aliases => 'm',
  );

This is a custom attribute metaclass which can be used to specify a the specific command line flag to use instead of the default one which MooseX::Getopt will create for you.

This is certainly not the prettiest way to go about this, but for now it works for those who might need such a feature.

You should rarely need to explicitly set the attribute metaclass. It is much preferred to simply provide a trait (a role applied to the attribute metaclass), which allows other code to further modify the attribute by applying additional roles.

Therefore, you should first try to do this:

  has 'foo' => (traits => ['Getopt'], cmd_flag => 'f');

This now takes advantage of the Moose 0.19 feature to support custom attribute metaclass aliases. This means you can also use this as the Getopt alias, like so:

  has 'foo' => (metaclass => 'Getopt', cmd_flag => 'f');

Changes the command-line flag to be this value, instead of the default, which is the same as the attribute name.

Adds more aliases for this command-line flag, useful for short options and such.

Bugs may be submitted through the RT bug tracker <https://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-Getopt> (or bug-MooseX-Getopt@rt.cpan.org <mailto:bug-MooseX-Getopt@rt.cpan.org>).

There is also a mailing list available for users of this distribution, at <http://lists.perl.org/list/moose.html>.

There is also an irc channel available for users of this distribution, at "#moose" on "irc.perl.org" <irc://irc.perl.org/#moose>.

Stevan Little <stevan@iinteractive.com>

This software is copyright (c) 2007 by Infinity Interactive, Inc.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

2021-03-16 perl v5.32.1

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