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/vendor/symfony/console/Command/ -> HelpCommand.php (source)

   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Console\Command;
  13  
  14  use Symfony\Component\Console\Helper\DescriptorHelper;
  15  use Symfony\Component\Console\Input\InputArgument;
  16  use Symfony\Component\Console\Input\InputInterface;
  17  use Symfony\Component\Console\Input\InputOption;
  18  use Symfony\Component\Console\Output\OutputInterface;
  19  
  20  /**
  21   * HelpCommand displays the help for a given command.
  22   *
  23   * @author Fabien Potencier <fabien@symfony.com>
  24   */
  25  class HelpCommand extends Command
  26  {
  27      private $command;
  28  
  29      /**
  30       * {@inheritdoc}
  31       */
  32      protected function configure()
  33      {
  34          $this->ignoreValidationErrors();
  35  
  36          $this
  37              ->setName('help')
  38              ->setDefinition([
  39                  new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', 'help'),
  40                  new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
  41                  new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw command help'),
  42              ])
  43              ->setDescription('Displays help for a command')
  44              ->setHelp(<<<'EOF'
  45  The <info>%command.name%</info> command displays help for a given command:
  46  
  47    <info>php %command.full_name% list</info>
  48  
  49  You can also output the help in other formats by using the <comment>--format</comment> option:
  50  
  51    <info>php %command.full_name% --format=xml list</info>
  52  
  53  To display the list of available commands, please use the <info>list</info> command.
  54  EOF
  55              )
  56          ;
  57      }
  58  
  59      public function setCommand(Command $command)
  60      {
  61          $this->command = $command;
  62      }
  63  
  64      /**
  65       * {@inheritdoc}
  66       */
  67      protected function execute(InputInterface $input, OutputInterface $output)
  68      {
  69          if (null === $this->command) {
  70              $this->command = $this->getApplication()->find($input->getArgument('command_name'));
  71          }
  72  
  73          $helper = new DescriptorHelper();
  74          $helper->describe($output, $this->command, [
  75              'format' => $input->getOption('format'),
  76              'raw_text' => $input->getOption('raw'),
  77          ]);
  78  
  79          $this->command = null;
  80      }
  81  }


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