Symfony\Installer\AboutCommand::execute PHP Method

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $commandHelp = <<<COMMAND_HELP

 Symfony Installer (%s)
 %s

 This is the official installer to start new projects based on the
 Symfony full-stack framework.

 To create a new project called <info>blog</info> in the current directory using
 the <info>latest stable version</info> of Symfony, execute the following command:

   <comment>%s new blog</comment>

 Create a project based on the <info>Symfony Long Term Support version</info> (LTS):

   <comment>%3\$s new blog lts</comment>

 Create a project based on a <info>specific Symfony branch</info>:

   <comment>%3\$s new blog 2.8</comment> or <comment>%3\$s new blog 3.0</comment>

 Create a project based on a <info>specific Symfony version</info>:

   <comment>%3\$s new blog 2.8.1</comment> or <comment>%3\$s new blog 3.0.1</comment>

 Create a <info>demo application</info> to learn how a Symfony application works:

   <comment>%3\$s demo</comment>

COMMAND_HELP;
        // show the self-update information only when using the PHAR file
        if ('phar://' === substr(__DIR__, 0, 7)) {
            $commandUpdateHelp = <<<COMMAND_UPDATE_HELP

 Updating the Symfony Installer
 ------------------------------

 New versions of the Symfony Installer are released regularly. To <info>update your
 installer</info> version, execute the following command:

   <comment>%3\$s self-update</comment>

COMMAND_UPDATE_HELP;
            $commandHelp .= $commandUpdateHelp;
        }
        $output->writeln(sprintf($commandHelp, $this->appVersion, str_repeat('=', 20 + strlen($this->appVersion)), $this->getExecutedCommand()));
    }