README

The Joomla Console package provide an elegant and nested command structure for your cli application.

The Command Calling Flow

If we type:

$ php cli/console.php command1 command2 command3 -a -b -cd --help

The command calling flow is:

rootCommand (console application)
    ->configure
    ->execute

    command1
        ->configure
        ->execute

        commend2
            ->configure
            ->execute

            commend3
                ->configure
                ->execute

            return exitCode

        return exitCode

    return exitCode

return exitCode

Initialising Console

Console is extends from AbstractCliApplication, help us create a command line application.

An example console application skeleton in cli/console.php file:

<?php

// Load the Composer autoloader
include __DIR__ . '/../vendor/autoload.php';

use Joomla\Console\Console;

$console = new Console;

$console->execute();

The execute() will find commands matched the cli input argument. If there are not any command registered, console will execute the Default Command.

Default Command

RootCommand is a command object extends from base Command object. It provides some useful helper, we can list all commands by typing:

$ php cli/app.php

By default, the output is:

Joomla! Console - version: 1.0
------------------------------------------------------------

[console.php Help]

The default application command

Usage:
  console.php <command> [option]


Options:

  -h / --help
      Display this help message.

  -q / --quiet
      Do not output any message.

  -v / --verbose
      Increase the verbosity of messages.

  --no-ansi
      Suppress ANSI colors on unsupported terminals.


Available commands:

  help    List all arguments and show usage & manual.


Welcome to Joomla! Console.

Set Executing Code for RootCommand

We can add closure to every commands, that this command will execute this function first. Use setHandler() on $console, the Console will auto pass the code to RootCommand:

<?php
// cli/console.php

// ...

$console->setHandler(
	function($command)
	{
		$command->out('This is default command.');

		return 0; // Return exit code.
	}
);

$console->execute();

This will do same action:

<?php
// cli/console.php

// ...

$console
    ->getRootCommand() // Return the RootCommand
    ->setHandler(
        function($command)
        {
            $command->out('This is default command.');

            return 0; // Return exit code.
        }
    );

$console->execute();

Retype $ php cli/console.php and output:

This is default command.

If we want to get help again, just type:

$ cli/console.php help

$ cli/console.php --help

Note: Command only return integer between 0 and 255, 0 means success, while others means failure or other status. The exit code of Unix/Linux meaning please see: Exit Codes Meanings

Add Help Message to Console

Console includes some help message like: name, version, description, usage and help.

If we add this messages to Console:

// cli/console.php

// ...

$console = with(new Console)
	->setName('Example Console')
	->setVersion('1.2.3')
	->setUsage('console.php <arguments> [-h|--help] [-q|--quiet]')
	->setDescription('Hello World')
	->setHelp(
<<<HELP
Hello, this is an example console, if you want to do something, see above:

$ foo bar -h => foo bar --help

---------

$ foo bar yoo -q => foo bar yoo --quiet
HELP
	);

// ...

The help will show:

Add First Level Command to Console

Now, we just use the default command. But there are not first level arguments we can call except HelpCommand.

We can add a command by this code:

<?php
// cli/console.php

$console->register('foo')
	->setDescription('This is first level foo command.')
	->setUsage('foo command [--option]')
	->setHelp('foo help')
	->setHandler(
		function($command)
		{
			$command->out('This is Foo Command executing code.');
		}
	);

Then we type:

$ cli/console.php foo

We will get:

This is Foo Command executing code.

If we type help:

$ cli/console.php -h

The foo command description has auto added to default command arguments list.

Using My Command Object

We can create our own command object instead setting it in runtime.

This is an example FooCommand:

<?php
// src/Myapp/Command/FooCommand.php

namespace Myapp\Command;

use Joomla\Console\Command\Command;

class FooCommand extends Command
{
    protected $name = 'foo';

    public function configure()
    {
        $this->setDescription('This is first level foo command.')
            ->setUsage('foo command [--option]')
            ->setHelp('foo help');
    }

    public function doExecute()
    {
        $this->out('This is Foo Command executing code.');
    }
}

And we register it in Console:

<?php
// cli/console.php

$console->addCommand(new FooCommand);

Using Arguments and Options

We can use this code to get arguments and options

public function configure()
{
    $this->setDescription('This is first level foo command.')
        ->setUsage('foo command [--option]')
        ->addOption(
            's', // option name
            0,   // default value
            'Add this option can make output lower case.', // option description
            Option::IS_GLOBAL // sub command will extends this global option
        )
        ->addOption(
            array('y', 'yell', 'Y'), // First element will be option name, others will be alias
            0,
            'Yell will make output upper case.',
            Option::IS_PRIVATE // sub command will not extends private option, this is default value, we don't need set private manually.
        )
        ->setHelp('foo help');
}

public function doExecute()
{
    if (empty($this->input->args[0]))
    {
        $this->out('Please enter a name: ');
        $name = fread(STDIN, 8792);
    }
    else
    {
        $name = $this->input->args[0];
    }

    $reply = 'Hello ' . $name;

    if ($this->getOption('y'))
    {
        $reply = strtoupper($reply);
    }

    if ($this->getOption('q'))
    {
        $reply = strtolower($reply);
    }

    $this->out($reply);
}

If we type:

$ php cli/console.php foo Asika --yell

$ php cli/console.php foo Asika -y

The getOption() method will auto detect option aliases, then we can get:

HELLO: ASIKA

Note: We have to addOption() first, then the getOption('x') is able to get the input option which we wanted.

If we don't do this first, we have to use $this->input->get('x') to get option value, but this way do not support option aliases.

Add Second Level Commands and more...

If we want to add several commands after FooCommand, we can use addCommand() method. Now we add two bar and yoo command to FooCommand.

Adding command in runtime.

We use addCommand() to add commands.

If a command has one or more sub commands, the arguments means to call sub command which name equals to first argument.

If a command has on sub commands, Command object will run executing code if set, or run doExecute() if executing code not set. Then the remaining arguments will save in $this->input->args.

<?php
// src/Myapp/Command/FooCommand.php

use Joomla\Console\Option\Option;

//...

    public function configure()
    {
        $this->setDescription('This is first level foo command.')
            ->setUsage('foo command [--option]')
            ->setHelp('foo help')
            ->addCommand(
                'bar',
                'Bar description.'
            )
            ->addCommand(
                'yoo',
                'Yoo description.',
                array(
                    new Option(array('y', 'yell'), 0),
                    new Option('s', 0, 'desc', Option::IS_GLOBAL)
                )
            );
    }

Adding command by classes

We declare BarCommand and YooCommand class first.

<?php
// src/Myapp/Command/Foo/BarCommand.php

namespace Myapp\Command\Foo;

use Joomla\Console\Command\Command;

class BarCommand extends Command
{
    protected $name = 'bar';

    public function configure()
    {
        $this->setDescription('This is second level bar command.')
            ->setUsage('bar command [--option]')
            ->setHelp('bar help')
            ->addOption(new Option(array('y', 'yell'), 0))
            ->addOption(new Option('s', 0, 'desc', Option::IS_GLOBAL));
    }

    public function doExecute()
    {
        $this->out('This is Bar Command executing code.');
    }
}

Then register them to FooCommand:

<?php
// src/Myapp/Command/FooCommand.php

use Myapp\Command\Foo\BarCommand;
use Myapp\Command\Foo\YooCommand;

//...

    public function configure()
    {
        $this->setDescription('This is first level foo command.')
            ->setUsage('foo command [--option]')
            ->setHelp('foo help')
            ->addCommand(new BarCommand)
            ->addCommand(new YooCommand);
    }

OK, typing:

$ cli/console.php foo bar

We get:

This is Bar Command executing code.

HelpCommand

HelpCommand will auto generate help list for us.

When we use addCommand(), addOption() and set some description or other information to these objects, they will save all information in it. Then when we type $ cli/console.php help somethine or $ cli/console.php somethine --help, The HelpCommand will return the help message to us.

Every command has these information, you can use setter and getter to access them:

Name (Command name. The name of RootCommand is file name.)
Description (Command description, will show after title in help output.)
Usage (Will show in help output of current command.)
Help (Will show in the help output bottom as a manual of current command)

The Console information:

Name (Name of this application, will show as title in help output.)
Description (RootCommand description.)
Usage (RootCommand usage.)
Help (RootCommand help)

Use Your Own Descriptor

If you want to override the Descriptor for your apps, you can do this:

<?php
use Myapp\Command\Descriptor\XmlDescriptorHelper;
use Myapp\Command\Descriptor\XmlCommandDescriptor;
use Myapp\Command\Descriptor\XmlOptionDescriptor;

// ...

$descriptor = new new XmlDescriptorHelper(
    new XmlCommandDescriptor,
    new XmlOptionDescriptor
);

$console->getRootCommand()
    ->getChild('help')
    ->setDescriptor($descriptor);

// ...

Use Command Without Console

We can using Command without Console or CliApplicaion, please see Command README.

Installation via Composer

Add "joomla/application": "dev-master" to the require block in your composer.json, make sure you have "minimum-stability": "dev" and then run composer install.

{
    "require": {
        "asika/joomla-console": "dev-master"
    },
    "minimum-stability": "dev"
}

Alternatively, you can simply run the following from the command line:

composer init --stability="dev"
composer require asika/joomla-console "dev-master"

asika / joomla-console

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