Building a single Command Application

Warning: You are browsing the documentation for Symfony 6.2, which is no longer maintained.

Read the updated version of this page for Symfony 7.1 (the current stable version).

Building a single Command Application

When building a command line tool, you may not need to provide several commands. In such a case, having to pass the command name each time is tedious. Fortunately, it is possible to remove this need by declaring a single command application:

        1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
        #!/usr/bin/env php
<?php
require __DIR__.'/vendor/autoload.php';

use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\SingleCommandApplication;

(new SingleCommandApplication())
    ->setName('My Super Command') // Optional
    ->setVersion('1.0.0') // Optional
    ->addArgument('foo', InputArgument::OPTIONAL, 'The directory')
    ->addOption('bar', null, InputOption::VALUE_REQUIRED)
    ->setCode(function (InputInterface $input, OutputInterface $output): int {
        // output arguments and options
    })
    ->run();
    

You can still register a command as usual:

        1
2
3
4
5
6
7
8
9
10
11
12
13
14
        #!/usr/bin/env php
<?php
require __DIR__.'/vendor/autoload.php';

use Acme\Command\DefaultCommand;
use Symfony\Component\Console\Application;

$application = new Application('echo', '1.0.0');
$command = new DefaultCommand();

$application->add($command);

$application->setDefaultCommand($command->getName(), true);
$application->run();
    

The setDefaultCommand() method accepts a boolean as second parameter. If true, the command echo will then always be used, without having to pass its name.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.

TOC

Version