NAME

       App::Cmd::Command::help - display a command's help screen

VERSION

       version 0.331

DESCRIPTION

       This command will either list all of the application commands and their abstracts, or
       display the usage screen for a subcommand with its description.

USAGE

       The help text is generated from three sources:

       •   The "usage_desc" method

       •   The "description" method

       •   The "opt_spec" data structure

       The "usage_desc" method provides the opening usage line, following the specification
       described in Getopt::Long::Descriptive.  In some cases, the default "usage_desc" in
       App::Cmd::Command may be sufficient and you will only need to override it to provide
       additional command line usage information.

       The "opt_spec" data structure is used with Getopt::Long::Descriptive to generate the
       description of the options.

       Subcommand classes should override the "discription" method to provide additional
       information that is prepended before the option descriptions.

       For example, consider the following subcommand module:

         package YourApp::Command::initialize;

         # This is the default from App::Cmd::Command
         sub usage_desc {
           my ($self) = @_;
           my $desc = $self->SUPER::usage_desc; # "%c COMMAND %o"
           return "$desc [DIRECTORY]";
         }

         sub description {
           return "The initialize command prepares the application...";
         }

         sub opt_spec {
           return (
             [ "skip-refs|R",  "skip reference checks during init", ],
             [ "values|v=s@",  "starting values", { default => [ 0, 1, 3 ] } ],
           );
         }

         ...

       That module would generate help output like this:

         $ yourapp help initialize
         yourapp initialize [-Rv] [long options...] [DIRECTORY]

         The initialize command prepares the application...

               --help            This usage screen
               -R --skip-refs    skip reference checks during init
               -v --values       starting values

AUTHOR

       Ricardo Signes <rjbs@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2016 by Ricardo Signes.

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