Commandable::Command(3p)

NAME
"Commandable::Command" - represent metadata for an invokable command

DESCRIPTION
Objects in this class are returned by a Commandable::Finder instance to represent individual commands that exist.

ACCESSORS
The following simple methods return metadata fields about the command

  name

  description
   $name = $command->name;
   $desc = $command->description;

Strings giving the short name (to be used on a commandline), and descriptive text for the command.

  arguments
   @args = $command->arguments;

A (possibly-empty) list of argument metadata structures.

  options
   %opts = $command->options;

A (possibly-empty) kvlist of option metadata structures.

  package
   $pkg = $command->package;

The package name as a plain string.

  code
   $sub = $command->code;

A CODE reference to the code actually implementing the command.

METHODS

  parse_invocation
Since version 0.12 this method has been moved to Commandable::Finder.

ARGUMENT SPECIFICATIONS
Each argument specification is given by an object having the following structure:

  name

  description
   $name = $argspec->name;

   $desc = $argspec->description;

Text strings for the user, used to generate the help text.

  optional
   $bool = $argspec->optional;

If false, the option is mandatory and an error is raised if no value is provided for it. If true, it is optional and if absent an "undef" will passed instead.

  slurpy
   $bool = $argspec->slurpy;

If true, the argument will be passed as an ARRAY reference containing the entire remaining list of tokens provided by the user.

OPTION SPECIFICATIONS
Each option specification is given by an object having the following structure:

  name
   $name = $optspec->name;

A string giving the primary human-readable name of the option.

  keyname
   $keyname = $optspec->keyname;

A string giving the name this option will be given in the options hash provided to the command subroutine. This is generated from the human-readable name, but hyphens are converted to underscores, to make it simpler to use as a hash key in Perl code.

  names
   @names = $optspec->names;

A list containing the name plus all the aliases this option is known by.

  description
   $desc = $optspec->description;

A text string containing information for the user, used to generate the help text.

  mode
   $mode = $optspec->mode;

A string that describes the behaviour of the option.

"set" options do not expect a value to be suppled by the user, and will store a true value in the options hash if present.

"value" options take a value from the rest of the token, or the next token.

   --opt=value
   --opt value

"multi_value" options can be supplied more than once; values are pushed into an ARRAY reference which is passed in the options hash.

"inc" options may be supplied more than once; each occurance will increment the stored value by one.

  default
   $val = $optspec->default;

A value to provide in the options hash if the user did not specify a different one.

  negatable
   $bool = $optspec->negatable;

If true, also accept a "--no-OPT" option to reset the value of the option to "undef".

  typespec
Since version 0.13 no longer supported.

  matches
   $re = $optspec->matches;

If defined, gives a precompiled regexp that any user-supplied value must conform to.

A few shortcuts are provided, which are used if the provided name ends in "=i" (for "integer"), "=u" (for "unsigned integer", i.e. non-negative) or "=f" (for "float").

AUTHOR
Paul Evans <leonerd@leonerd.org.uk>