/ 
Crane-1.00.0002
River stage zero No dependents
/ Crane::Options

NAME

Crane::Options - Command line options and arguments parser.

SYNOPSIS

use Crane::Options;

my $option = options->{'version'};
my $arg2   = args->[1];

DESCRIPTION

Parses command line options and arguments. Options are available as hash reference returned by "options" function and arguments are available as array reference returned by "args" function.

You can configure options by passing list of array references when first call "options" function (see description below).

By default two options are available: version and help (? as short alias).

CONSTANTS

$OPT_SEPARATOR

Not an option exaclty, just a separator in help output.

Equals to:

[]
$OPT_VERSION

Version information output.

Equals to:

[ 'version!', 'Shows version information and exists.' ]
$OPT_HELP

Help output.

Equals to:

[ 'help|?!', Shows this help and exits.' ]

FUNCTIONS

options LIST

Returns hash reference to command line options.

Can be configured when first call with list of options. For create an option you should pass a list of array references with one required and two optional items:

Specification (required)

Scalar. Specification from Getopt::Long module.

Description (optional)

Scalar. Text description - what is this option does?

Parameters (optional)

Hash reference. Additional parameters:

default

Default value for option if option does not exist.

required

Flag that option should be exists.

args

Returns array reference to command line arguments.

ERRORS

Invalid option specification: %s

Where %s is specification string.

Fires when required parameter of specification is not defined or incorrect.

DIAGNOSTICS

Option required: %s

Where %s is an option name.

Option does not exist but required.

EXAMPLES

Simple option in compare with defaults

Configuration:

options(
    [ 'config|C=s', 'Path to configuration file.' ],
    $OPT_SEPARATOR,
    $OPT_VERSION,
    $OPT_HELP,
);

Help output:

example.pl <options> <args>
  -C --config             Path to configuration file.

     --version            Shows version information and exists.
  -? --help               Shows this help and exits.

Two required arguments, one with default value and default options

Configuration:

options(
    [ 'daemon|M!', 'Run as daemon.',         { 'default'  => 1 } ],
    $OPT_SEPARATOR,
    [ 'from=s',    'Start of the interval.', { 'required' => 1 } ],
    [ 'to=s',      'End of the interval.',   { 'required' => 1 } ],
    $OPT_SEPARATOR,
    $OPT_VERSION,
    $OPT_HELP,
);

Help output:

example.pl <options> <args>
  -M --daemon             Run as daemon.

     --from               Start of the interval.
     --to                 End of the interval.

     --version            Shows version information and exists.
  -? --help               Shows this help and exits.

AUTHOR

Tema Novikov, <novikov.tema@gmail.com>

COPYRIGHT AND LICENSE

Copyright 2013-2014 Tema Novikov.

This library is free software; you may redistribute it and/or modify it under the same terms as Perl itself.