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Commit5e97202

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‎components/console/changing_default_behavior.rst

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..index::
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single: Console; Changing the Default Command
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Changing the Default Command
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============================
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..versionadded::2.5,
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The:method:`Symfony\\Component\\Console\\Application::setDefaultCommand`
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method was introduced in version 2.5.
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By default the Application will always run the ``ListCommand``. In order to change
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the default command you just need to pass the command name you want to run by
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default to the ``setDefaultCommand`` method::
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namespace Acme\Command;
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use Symfony\Component\Console\Command\Command;
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use Symfony\Component\Console\Input\InputInterface;
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use Symfony\Component\Console\Output\OutputInterface;
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class HelloWorldCommand extends Command
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{
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protected function configure()
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{
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$this->setName('hello:world')
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->setDescription('Outputs \'Hello World\'');
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}
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protected function execute(InputInterface $input, OutputInterface $output)
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{
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$output->writeln('Hello World');
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}
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}
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Executing the application and changing the default Command::
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// application.php
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use Acme\Command\HelloWorldCommand;
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use Symfony\Component\Console\Application;
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$command = new HelloWorldCommand();
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$application = new Application();
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$application->add($command);
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$application->setDefaultCommand($command->getName());
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$application->run();
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Test the new default console command by running the following
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..code-block::bash
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$ php application.php
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This will print the following to the command line:
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..code-block::text
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Hello Fabien
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..tip::
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The feature was a limitation since you cannot use the Command ``arguments``.
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Learn More!
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-----------
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*:doc:`/components/console/single_command_tool`

‎components/console/index.rst

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introduction
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usage
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changing_default_behavior
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changing_default_command
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single_command_tool
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events
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helpers/index

‎components/console/introduction.rst

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-----------
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*:doc:`/components/console/usage`
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*:doc:`/components/console/changing_default_behavior`
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*:doc:`/components/console/single_command_tool`
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*:doc:`/components/console/changing_default_command`
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.. _Packagist:https://packagist.org/packages/symfony/console
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.. _ANSICON:https://github.com/adoxa/ansicon/downloads
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..index::
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single: Console; Single command application
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14
Building a Single Command Application
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=====================================
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This Document was moved to:doc:`/components/console/changing_default_behaviour`
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When building a command line tool, you may not need to provide several commands.
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In such case, having to pass the command name each time is tedious. Fortunately,
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it is possible to remove this need by extending the application::
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namespace Acme\Tool;
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use Symfony\Component\Console\Application;
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use Symfony\Component\Console\Input\InputInterface;
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class MyApplication extends Application
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{
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/**
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* Gets the name of the command based on input.
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*
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* @param InputInterface $input The input interface
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*
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* @return string The command name
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*/
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protected function getCommandName(InputInterface $input)
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{
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// This should return the name of your command.
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return 'my_command';
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}
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/**
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* Gets the default commands that should always be available.
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*
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* @return array An array of default Command instances
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*/
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protected function getDefaultCommands()
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{
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// Keep the core default commands to have the HelpCommand
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// which is used when using the --help option
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$defaultCommands = parent::getDefaultCommands();
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$defaultCommands[] = new MyCommand();
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return $defaultCommands;
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}
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/**
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* Overridden so that the application doesn't expect the command
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* name to be the first argument.
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*/
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public function getDefinition()
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{
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$inputDefinition = parent::getDefinition();
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// clear out the normal first argument, which is the command name
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$inputDefinition->setArguments();
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return $inputDefinition;
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}
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}
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When calling your console script, the command ``MyCommand`` will then always
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be used, without having to pass its name.
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You can also simplify how you execute the application::
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#!/usr/bin/env php
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<?php
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// command.php
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use Acme\Tool\MyApplication;
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$application = new MyApplication();
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$application->run();

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