New Feature: Change the Default Command in the Console component

components/console/changing_default_command.rst

@@ -0,0 +1,67 @@
+.. index::
+   single: Console; Changing the Default Command
+
+Changing the Default Command
+============================
+
+.. versionadded:: 2.5,
+    The :method:`Symfony\\Component\\Console\\Application::setDefaultCommand`
+    method was introduced in version 2.5.
+
+By default the Application will always run the ``ListCommand``. In order to change
+the default command you just need to pass the command name you want to run by
+default to the ``setDefaultCommand`` method::
+
+    namespace Acme\Command;
+
+    use Symfony\Component\Console\Command\Command;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
+
+    class HelloWorldCommand extends Command
+    {
+        protected function configure()
+        {
+            $this->setName('hello:world')
+                ->setDescription('Outputs \'Hello World\'');
+        }
+
+        protected function execute(InputInterface $input, OutputInterface $output)
+        {
+            $output->writeln('Hello World');
+        }
+    }
+
+Executing the application and changing the default Command::
+
+    // application.php
+
+    use Acme\Command\HelloWorldCommand;
+    use Symfony\Component\Console\Application;
+
+    $command = new HelloWorldCommand();
+    $application = new Application();
+    $application->add($command);
+    $application->setDefaultCommand($command->getName());
+    $application->run();
+
+Test the new default console command by running the following
+
+.. code-block:: bash
+
+    $ php application.php
+
+This will print the following to the command line:
+
+.. code-block:: text
+
+    Hello Fabien
+
+.. tip::
+
+    The feature was a limitation since you cannot use the Command ``arguments``.
+
+Learn More!
+-----------
+
+* :doc:`/components/console/single_command_tool`

components/console/index.rst

@@ -6,6 +6,7 @@ Console
 
     introduction
     usage
+    changing_default_command
     single_command_tool
     events
     helpers/index

components/console/introduction.rst

@@ -526,6 +526,7 @@ Learn More!
 
 * :doc:`/components/console/usage`
 * :doc:`/components/console/single_command_tool`
+* :doc:`/components/console/changing_default_command`
 
 .. _Packagist: https://packagist.org/packages/symfony/console
 .. _ANSICON: https://github.com/adoxa/ansicon/downloads

components/console/single_command_tool.rst

@@ -1,5 +1,5 @@
 .. index::
-   single: Console; Single command application
+single: Console; Single command application
 
 Building a Single Command Application
 =====================================

components/map.rst.inc

@@ -19,7 +19,7 @@
 
   * :doc:`/components/console/introduction`
   * :doc:`/components/console/usage`
-  * :doc:`/components/console/single_command_tool`
+  * :doc:`/components/console/changing_default_behavior`
   * :doc:`/components/console/events`
   * :doc:`/components/console/helpers/index`