Building a single Command Application

namespace AcmeTool;

use SymfonyComponentConsoleApplication;
use SymfonyComponentConsoleInputInputInterface;

class MyApplication extends Application
{
    /**
     * Gets the name of the command based on input.
     *
     * @param InputInterface $input The input interface
     *
     * @return string The command name
     */
    protected function getCommandName(InputInterface $input)
    {
        // This should return the name of your command.
        return 'my_command';
    }

    /**
     * Gets the default commands that should always be available.
     *
     * @return array An array of default Command instances
     */
    protected function getDefaultCommands()
    {
        // Keep the core default commands to have the HelpCommand
        // which is used when using the --help option
        $defaultCommands = parent::getDefaultCommands();

        $defaultCommands[] = new MyCommand();

        return $defaultCommands;
    }

    /**
     * Overridden so that the application doesn't expect the command
     * name to be the first argument.
     */
    public function getDefinition()
    {
        $inputDefinition = parent::getDefinition();
        // clear out the normal first argument, which is the command name
        $inputDefinition->setArguments();

        return $inputDefinition;
    }
}

#!/usr/bin/env php
<?php
// command.php

use AcmeToolMyApplication;

$application = new MyApplication();
$application->run();