NAME MooseX::App - Write user-friendly command line apps with even less suffering SYNOPSIS In your base class: package MyApp; use MooseX::App qw(Color); option 'global_option' => ( is => 'rw', isa => 'Bool', documentation => q[Enable this to do fancy stuff], ); # Global option has 'private' => ( is => 'rw', ); # not exposed Write multiple command classes (If you have only a single command class you should use MooseX::App::Simple instead) package MyApp::SomeCommand; use MooseX::App::Command; # important (also imports Moose) extends qw(MyApp); # optional, only if you want to use global options from base class # Positional parameter parameter 'some_parameter' => ( is => 'rw', isa => 'Str', required => 1, documentation => q[Some parameter that you need to supply], ); option 'some_option' => ( is => 'rw', isa => 'Int', required => 1, documentation => q[Very important option!], ); # Option sub run { my ($self) = @_; # Do something } And then you need a simple wrapper script (called eg. myapp): #!/usr/bin/env perl use MyApp; MyApp->new_with_command->run; On the command line: bash$ myapp help usage: myapp [long options...] myapp help global options: --global_option Enable this to do fancy stuff [Flag] --help --usage -? Prints this usage information. [Flag] available commands: some_command Description of some command another_command Description of another command help Prints this usage information or bash$ myapp some_command --help usage: myapp some_command [long options...] myapp help myapp some_command --help parameters: some_parameter Some parameter that you need to supply [Required] options: --global_option Enable this to do fancy stuff [Flag] --some_option Very important option! [Int,Required] --help --usage -? Prints this usage information. [Flag] DESCRIPTION MooseX-App is a highly customisable helper to write user-friendly command line applications without having to worry about most of the annoying things usually involved. Just take any existing Moose class, add a single line ("use MooseX-App qw(PluginA PluginB ...);") and create one class for each command in an underlying namespace. Options and positional parameters can be defined as simple Moose accessors. MooseX-App will then * Find, load and initialise the command classes (see MooseX-App-Simple for single command applications) * Create automated help and documentation from modules POD as well as attributes metadata and type constraints * Read, encode and validate the command line options and positional parameters entered by the user from @ARGV and %ENV (and possibly prompt the user for additional parameters see MooseX-App-Plugin-Term) * Provide helpful error messages if user input cannot be validated (either missing or wrong attributes or Moose type constraints not satisfied) Commandline options are defined using the 'option' keyword which accepts the same attributes as Moose' 'has' keyword. option 'some_option' => ( is => 'rw', isa => 'Str', ); This is equivalent to has 'some_option' => ( is => 'rw', isa => 'Str', traits => ['AppOption'], # Load extra metaclass cmd_type => 'option', # Set attribute type ); Single letter options are treated as flags and may be combined with eachother. Positional parameters are defined with the 'parameter' keyword parameter 'some_option' => ( is => 'rw', isa => 'Str', ); This is equivalent to has 'some_option' => ( is => 'rw', isa => 'Str', traits => ['AppOption'], cmd_type => 'parameter', ); Furthermore, all options and parameters can also be supplied via %ENV option 'some_option' => ( is => 'rw', isa => 'Str', cmd_env => 'SOME_OPTION', ); Read the Tutorial for getting started with a simple MooseX::App command line application. METHODS new_with_command my $myapp_command = MyApp->new_with_command(); This constructor reads the command line arguments and tries to create a command class instance. If it fails it retuns a MooseX::App::Message::Envelope object holding an error message. You can pass a hash of default/fallback params to new_with_command my $obj = MyApp->new_with_command(%default); initialize_command_class my $obj = MyApp->initialize_command_class($command_name,%default); Helper method to instantiate the command class for the given command. GLOBAL OPTIONS app_base app_base 'my_script'; # Defaults to $0 Usually MooseX::App will take the name of the calling wrapper script to construct the program name in various help messages. This name can be changed via the app_base function. app_fuzzy app_fuzzy(1); # default OR app_fuzzy(0); Enables fuzzy matching of commands and attributes. Is turned on by default. app_strict app_strict(0); # default OR app_strict(1); If strict is enabled the program will terminate with an error message if superfluous/unknown positional parameters are supplied. If disabled all extra parameters will be copied to the extra_argv attribute. The command_strict config in the command classes allows one to set this option individually for each command in the respective command class. app_prefer_commandline app_prefer_commandline(0); # default or app_prefer_commandline(1); Specifies if parameters/options supplied via @ARGV,%ENV should take precedence over arguments passed to new_with_command. app_namespace app_namespace 'MyApp::Commands', 'YourApp::MoreCommands'; OR app_namespace(); Usually MooseX::App will take the package name of the base class as the namespace for commands. This namespace can be changed and you can add multiple extra namespaces. If app_namespace is called with no parameters then autoloading of command classes will be disabled entirely. app_command_name app_command_name { my ($package) = shift; # munge package name; return $command_name; }; This coderef can be used to control how autoloaded package names should be translated to command names. app_command_register app_command_register do => 'MyApp::Commands::DoSomething', undo => 'MyApp::Commands::UndoSomething'; This keyword can be used to register additional commands. Especially usefull in conjunction with app_namespace. app_description app_description qq[Description text]; Set the description. If not set this information will be taken from the Pod DESCRIPTION or OVERVIEW sections. app_usage app_usage qq[myapp --option ...]; Set custom usage. If not set this will be taken from the Pod SYNOPSIS or USAGE section. If both sections are not available, the usage information will be autogenerated. GLOBAL ATTRIBUTES All MooseX::App classes will have two extra attributes extra_argv Carries all parameters from @ARGV that were not consumed (only if app_strict is turned off, otherwise superfluous parameters will raise an exception). help_flag Help flag that is set when help was requested. ATTRIBUTE OPTIONS Options and parameters accept extra attributes for customisation: * cmd_tags - Extra tags (as used by the help) * cmd_flag - Override option/parameter name * cmd_aliases - Additional option/parameter names * cmd_split - Split values into ArrayRefs * cmd_position - Specify option/parameter order in help * cmd_env - Read options/parameters from %ENV * cmd_count - Value of option equals to number of occurences in @ARGV Refer to MooseX::App::Meta::Role::Attribute::Option for detailed documentation. METADATA MooseX::App will use your class metadata and POD to construct the commands and helpful error- or usage- messages. These bits of information are utilised and should be provided if possible: * Package names * required options for Moose attributes * documentation options for Moose attributes * Moose type constraints (Bool, ArrayRef, HashRef, Int, Num, and Enum) * Documentation set via app_description, app_usage, command_short_description, command_long_description and command_usage * POD (NAME, ABSTRACT, DESCRIPTION, USAGE, SYNOPSIS, OVERVIEW, COPYRIGHT, LICENSE, COPYRIGHT AND LICENSE, AUTHOR and AUTHORS sections) * Dzil ABSTRACT tag if no POD is available yet PLUGINS The behaviour of MooseX-App can be customised with plugins. To load a plugin just pass a list of plugin names after the "use MooseX-App" statement. (Attention: order sometimes matters) use MooseX::App qw(PluginA PluginB); Currently the following plugins are shipped with MooseX::App * MooseX::App::Plugin::BashCompletion Adds a command that genereates a bash completion script for your application. * MooseX::App::Plugin::Color Colorful output for your MooseX::App applications. * MooseX::App::Plugin::Config Config files for MooseX::App applications. * MooseX::App::Plugin::ConfigHome Search config files in users home directory. * MooseX::App::Plugin::Term Prompt user for options and parameters that were not provided via options or params. Prompt offers basic editing capabilities and history * MooseX::App::Plugin::Typo Handle typos in command names and provide suggestions. * MooseX::App::Plugin::Version Adds a command to display the version and license of your application. * MooseX::App::Plugin::Man Display full manpage of application and commands. * MooseX::App::Plugin::MutexGroup Allow for mutally exclusive options * MooseX::App::Plugin::Depends Adds dependent options Refer to Writing MooseX-App Plugins for documentation on how to create your own plugins. CAVEATS & KNOWN BUGS Startup time may be an issue - escpecially if you load many plugins. If you do not require the functionality of plugins and ability for fine grained customisation (or Moose for that matter) then you should probably use MooX::Options or MooX::Cmd. In some cases - especially when using non-standard class inheritance - you may end up with command classes lacking the help attribute. In this case you need to include the following line in your base class with qw(MooseX::App::Role::Common); SEE ALSO Read the Tutorial for getting started with a simple MooseX::App command line application. For alternatives you can check out MooseX::App::Cmd, MooseX::Getopt, MooX::Options, MooX::Cmd and App::Cmd SUPPORT Please report any bugs or feature requests to "bug-moosex-app@rt.cpan.org", or through the web interface at . I will be notified, and then you'll automatically be notified of progress on your report as I make changes. AUTHOR Maroš Kollár CPAN ID: MAROS maros [at] k-1.com http://www.k-1.com CONTRIBUTORS Special thanks to all contributors. In no particular order: Andrew Jones, George Hartzell, Steve Nolte, Michael G, Thomas Klausner, Yanick Champoux, Edward Baudrez, David Golden, J.R. Mash, Thilo Fester, Gregor Herrmann, Sergey Romanov, Sawyer X, Roman F., Hunter McMillen COPYRIGHT MooseX::App is Copyright (c) 2012-15 Maroš Kollár. This library is free software and may be distributed under the same terms as perl itself. The full text of the licence can be found in the LICENCE file included with this module.