class Command in Zircon Profile 8.0

Base class for all commands.

@author Fabien Potencier <[e-mail]>

Hierarchy

• class \Symfony\Component\Console\Command\Command

35 files declare their use of Command

AbstractDescriptorTest.php in vendor/symfony/console/Tests/Descriptor/AbstractDescriptorTest.php

Application.php in vendor/symfony/console/Application.php

ApplicationDescription.php in vendor/symfony/console/Descriptor/ApplicationDescription.php

BarBucCommand.php in vendor/symfony/console/Tests/Fixtures/BarBucCommand.php

BarCommand.php in vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/Command/BarCommand.php

... See full list

File

vendor/symfony/console/Command/Command.php, line 30

Namespace

Symfony\Component\Console\Command

class Command {
  private $application;
  private $name;
  private $processTitle;
  private $aliases = array();
  private $definition;
  private $help;
  private $description;
  private $ignoreValidationErrors = false;
  private $applicationDefinitionMerged = false;
  private $applicationDefinitionMergedWithArgs = false;
  private $code;
  private $synopsis = array();
  private $usages = array();
  private $helperSet;

  /**
   * Constructor.
   *
   * @param string|null $name The name of the command; passing null means it must be set in configure()
   *
   * @throws \LogicException When the command name is empty
   */
  public function __construct($name = null) {
    $this->definition = new InputDefinition();
    if (null !== $name) {
      $this
        ->setName($name);
    }
    $this
      ->configure();
    if (!$this->name) {
      throw new \LogicException(sprintf('The command defined in "%s" cannot have an empty name.', get_class($this)));
    }
  }

  /**
   * Ignores validation errors.
   *
   * This is mainly useful for the help command.
   */
  public function ignoreValidationErrors() {
    $this->ignoreValidationErrors = true;
  }

  /**
   * Sets the application instance for this command.
   *
   * @param Application $application An Application instance
   */
  public function setApplication(Application $application = null) {
    $this->application = $application;
    if ($application) {
      $this
        ->setHelperSet($application
        ->getHelperSet());
    }
    else {
      $this->helperSet = null;
    }
  }

  /**
   * Sets the helper set.
   *
   * @param HelperSet $helperSet A HelperSet instance
   */
  public function setHelperSet(HelperSet $helperSet) {
    $this->helperSet = $helperSet;
  }

  /**
   * Gets the helper set.
   *
   * @return HelperSet A HelperSet instance
   */
  public function getHelperSet() {
    return $this->helperSet;
  }

  /**
   * Gets the application instance for this command.
   *
   * @return Application An Application instance
   */
  public function getApplication() {
    return $this->application;
  }

  /**
   * Checks whether the command is enabled or not in the current environment.
   *
   * Override this to check for x or y and return false if the command can not
   * run properly under the current conditions.
   *
   * @return bool
   */
  public function isEnabled() {
    return true;
  }

  /**
   * Configures the current command.
   */
  protected function configure() {
  }

  /**
   * Executes the current command.
   *
   * This method is not abstract because you can use this class
   * as a concrete class. In this case, instead of defining the
   * execute() method, you set the code to execute by passing
   * a Closure to the setCode() method.
   *
   * @param InputInterface  $input  An InputInterface instance
   * @param OutputInterface $output An OutputInterface instance
   *
   * @return null|int null or 0 if everything went fine, or an error code
   *
   * @throws \LogicException When this abstract method is not implemented
   *
   * @see setCode()
   */
  protected function execute(InputInterface $input, OutputInterface $output) {
    throw new \LogicException('You must override the execute() method in the concrete command class.');
  }

  /**
   * Interacts with the user.
   *
   * This method is executed before the InputDefinition is validated.
   * This means that this is the only place where the command can
   * interactively ask for values of missing required arguments.
   *
   * @param InputInterface  $input  An InputInterface instance
   * @param OutputInterface $output An OutputInterface instance
   */
  protected function interact(InputInterface $input, OutputInterface $output) {
  }

  /**
   * Initializes the command just after the input has been validated.
   *
   * This is mainly useful when a lot of commands extends one main command
   * where some things need to be initialized based on the input arguments and options.
   *
   * @param InputInterface  $input  An InputInterface instance
   * @param OutputInterface $output An OutputInterface instance
   */
  protected function initialize(InputInterface $input, OutputInterface $output) {
  }

  /**
   * Runs the command.
   *
   * The code to execute is either defined directly with the
   * setCode() method or by overriding the execute() method
   * in a sub-class.
   *
   * @param InputInterface  $input  An InputInterface instance
   * @param OutputInterface $output An OutputInterface instance
   *
   * @return int The command exit code
   *
   * @throws \Exception
   *
   * @see setCode()
   * @see execute()
   */
  public function run(InputInterface $input, OutputInterface $output) {

    // force the creation of the synopsis before the merge with the app definition
    $this
      ->getSynopsis(true);
    $this
      ->getSynopsis(false);

    // add the application arguments and options
    $this
      ->mergeApplicationDefinition();

    // bind the input against the command specific arguments/options
    try {
      $input
        ->bind($this->definition);
    } catch (\Exception $e) {
      if (!$this->ignoreValidationErrors) {
        throw $e;
      }
    }
    $this
      ->initialize($input, $output);
    if (null !== $this->processTitle) {
      if (function_exists('cli_set_process_title')) {
        cli_set_process_title($this->processTitle);
      }
      elseif (function_exists('setproctitle')) {
        setproctitle($this->processTitle);
      }
      elseif (OutputInterface::VERBOSITY_VERY_VERBOSE === $output
        ->getVerbosity()) {
        $output
          ->writeln('<comment>Install the proctitle PECL to be able to change the process title.</comment>');
      }
    }
    if ($input
      ->isInteractive()) {
      $this
        ->interact($input, $output);
    }

    // The command name argument is often omitted when a command is executed directly with its run() method.
    // It would fail the validation if we didn't make sure the command argument is present,
    // since it's required by the application.
    if ($input
      ->hasArgument('command') && null === $input
      ->getArgument('command')) {
      $input
        ->setArgument('command', $this
        ->getName());
    }
    $input
      ->validate();
    if ($this->code) {
      $statusCode = call_user_func($this->code, $input, $output);
    }
    else {
      $statusCode = $this
        ->execute($input, $output);
    }
    return is_numeric($statusCode) ? (int) $statusCode : 0;
  }

  /**
   * Sets the code to execute when running this command.
   *
   * If this method is used, it overrides the code defined
   * in the execute() method.
   *
   * @param callable $code A callable(InputInterface $input, OutputInterface $output)
   *
   * @return Command The current instance
   *
   * @throws \InvalidArgumentException
   *
   * @see execute()
   */
  public function setCode($code) {
    if (!is_callable($code)) {
      throw new \InvalidArgumentException('Invalid callable provided to Command::setCode.');
    }
    $this->code = $code;
    return $this;
  }

  /**
   * Merges the application definition with the command definition.
   *
   * This method is not part of public API and should not be used directly.
   *
   * @param bool $mergeArgs Whether to merge or not the Application definition arguments to Command definition arguments
   */
  public function mergeApplicationDefinition($mergeArgs = true) {
    if (null === $this->application || true === $this->applicationDefinitionMerged && ($this->applicationDefinitionMergedWithArgs || !$mergeArgs)) {
      return;
    }
    if ($mergeArgs) {
      $currentArguments = $this->definition
        ->getArguments();
      $this->definition
        ->setArguments($this->application
        ->getDefinition()
        ->getArguments());
      $this->definition
        ->addArguments($currentArguments);
    }
    $this->definition
      ->addOptions($this->application
      ->getDefinition()
      ->getOptions());
    $this->applicationDefinitionMerged = true;
    if ($mergeArgs) {
      $this->applicationDefinitionMergedWithArgs = true;
    }
  }

  /**
   * Sets an array of argument and option instances.
   *
   * @param array|InputDefinition $definition An array of argument and option instances or a definition instance
   *
   * @return Command The current instance
   */
  public function setDefinition($definition) {
    if ($definition instanceof InputDefinition) {
      $this->definition = $definition;
    }
    else {
      $this->definition
        ->setDefinition($definition);
    }
    $this->applicationDefinitionMerged = false;
    return $this;
  }

  /**
   * Gets the InputDefinition attached to this Command.
   *
   * @return InputDefinition An InputDefinition instance
   */
  public function getDefinition() {
    return $this->definition;
  }

  /**
   * Gets the InputDefinition to be used to create XML and Text representations of this Command.
   *
   * Can be overridden to provide the original command representation when it would otherwise
   * be changed by merging with the application InputDefinition.
   *
   * This method is not part of public API and should not be used directly.
   *
   * @return InputDefinition An InputDefinition instance
   */
  public function getNativeDefinition() {
    return $this
      ->getDefinition();
  }

  /**
   * Adds an argument.
   *
   * @param string $name        The argument name
   * @param int    $mode        The argument mode: InputArgument::REQUIRED or InputArgument::OPTIONAL
   * @param string $description A description text
   * @param mixed  $default     The default value (for InputArgument::OPTIONAL mode only)
   *
   * @return Command The current instance
   */
  public function addArgument($name, $mode = null, $description = '', $default = null) {
    $this->definition
      ->addArgument(new InputArgument($name, $mode, $description, $default));
    return $this;
  }

  /**
   * Adds an option.
   *
   * @param string $name        The option name
   * @param string $shortcut    The shortcut (can be null)
   * @param int    $mode        The option mode: One of the InputOption::VALUE_* constants
   * @param string $description A description text
   * @param mixed  $default     The default value (must be null for InputOption::VALUE_REQUIRED or InputOption::VALUE_NONE)
   *
   * @return Command The current instance
   */
  public function addOption($name, $shortcut = null, $mode = null, $description = '', $default = null) {
    $this->definition
      ->addOption(new InputOption($name, $shortcut, $mode, $description, $default));
    return $this;
  }

  /**
   * Sets the name of the command.
   *
   * This method can set both the namespace and the name if
   * you separate them by a colon (:)
   *
   *     $command->setName('foo:bar');
   *
   * @param string $name The command name
   *
   * @return Command The current instance
   *
   * @throws \InvalidArgumentException When the name is invalid
   */
  public function setName($name) {
    $this
      ->validateName($name);
    $this->name = $name;
    return $this;
  }

  /**
   * Sets the process title of the command.
   *
   * This feature should be used only when creating a long process command,
   * like a daemon.
   *
   * PHP 5.5+ or the proctitle PECL library is required
   *
   * @param string $title The process title
   *
   * @return Command The current instance
   */
  public function setProcessTitle($title) {
    $this->processTitle = $title;
    return $this;
  }

  /**
   * Returns the command name.
   *
   * @return string The command name
   */
  public function getName() {
    return $this->name;
  }

  /**
   * Sets the description for the command.
   *
   * @param string $description The description for the command
   *
   * @return Command The current instance
   */
  public function setDescription($description) {
    $this->description = $description;
    return $this;
  }

  /**
   * Returns the description for the command.
   *
   * @return string The description for the command
   */
  public function getDescription() {
    return $this->description;
  }

  /**
   * Sets the help for the command.
   *
   * @param string $help The help for the command
   *
   * @return Command The current instance
   */
  public function setHelp($help) {
    $this->help = $help;
    return $this;
  }

  /**
   * Returns the help for the command.
   *
   * @return string The help for the command
   */
  public function getHelp() {
    return $this->help;
  }

  /**
   * Returns the processed help for the command replacing the %command.name% and
   * %command.full_name% patterns with the real values dynamically.
   *
   * @return string The processed help for the command
   */
  public function getProcessedHelp() {
    $name = $this->name;
    $placeholders = array(
      '%command.name%',
      '%command.full_name%',
    );
    $replacements = array(
      $name,
      $_SERVER['PHP_SELF'] . ' ' . $name,
    );
    return str_replace($placeholders, $replacements, $this
      ->getHelp() ?: $this
      ->getDescription());
  }

  /**
   * Sets the aliases for the command.
   *
   * @param string[] $aliases An array of aliases for the command
   *
   * @return Command The current instance
   *
   * @throws \InvalidArgumentException When an alias is invalid
   */
  public function setAliases($aliases) {
    if (!is_array($aliases) && !$aliases instanceof \Traversable) {
      throw new \InvalidArgumentException('$aliases must be an array or an instance of \\Traversable');
    }
    foreach ($aliases as $alias) {
      $this
        ->validateName($alias);
    }
    $this->aliases = $aliases;
    return $this;
  }

  /**
   * Returns the aliases for the command.
   *
   * @return array An array of aliases for the command
   */
  public function getAliases() {
    return $this->aliases;
  }

  /**
   * Returns the synopsis for the command.
   *
   * @param bool $short Whether to show the short version of the synopsis (with options folded) or not
   *
   * @return string The synopsis
   */
  public function getSynopsis($short = false) {
    $key = $short ? 'short' : 'long';
    if (!isset($this->synopsis[$key])) {
      $this->synopsis[$key] = trim(sprintf('%s %s', $this->name, $this->definition
        ->getSynopsis($short)));
    }
    return $this->synopsis[$key];
  }

  /**
   * Add a command usage example.
   *
   * @param string $usage The usage, it'll be prefixed with the command name
   */
  public function addUsage($usage) {
    if (0 !== strpos($usage, $this->name)) {
      $usage = sprintf('%s %s', $this->name, $usage);
    }
    $this->usages[] = $usage;
    return $this;
  }

  /**
   * Returns alternative usages of the command.
   *
   * @return array
   */
  public function getUsages() {
    return $this->usages;
  }

  /**
   * Gets a helper instance by name.
   *
   * @param string $name The helper name
   *
   * @return mixed The helper value
   *
   * @throws \InvalidArgumentException if the helper is not defined
   */
  public function getHelper($name) {
    return $this->helperSet
      ->get($name);
  }

  /**
   * Returns a text representation of the command.
   *
   * @return string A string representing the command
   *
   * @deprecated since version 2.3, to be removed in 3.0.
   */
  public function asText() {
    @trigger_error('The ' . __METHOD__ . ' method is deprecated since version 2.3 and will be removed in 3.0.', E_USER_DEPRECATED);
    $descriptor = new TextDescriptor();
    $output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, true);
    $descriptor
      ->describe($output, $this, array(
      'raw_output' => true,
    ));
    return $output
      ->fetch();
  }

  /**
   * Returns an XML representation of the command.
   *
   * @param bool $asDom Whether to return a DOM or an XML string
   *
   * @return string|\DOMDocument An XML string representing the command
   *
   * @deprecated since version 2.3, to be removed in 3.0.
   */
  public function asXml($asDom = false) {
    @trigger_error('The ' . __METHOD__ . ' method is deprecated since version 2.3 and will be removed in 3.0.', E_USER_DEPRECATED);
    $descriptor = new XmlDescriptor();
    if ($asDom) {
      return $descriptor
        ->getCommandDocument($this);
    }
    $output = new BufferedOutput();
    $descriptor
      ->describe($output, $this);
    return $output
      ->fetch();
  }

  /**
   * Validates a command name.
   *
   * It must be non-empty and parts can optionally be separated by ":".
   *
   * @param string $name
   *
   * @throws \InvalidArgumentException When the name is invalid
   */
  private function validateName($name) {
    if (!preg_match('/^[^\\:]++(\\:[^\\:]++)*$/', $name)) {
      throw new \InvalidArgumentException(sprintf('Command name "%s" is invalid.', $name));
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Command::$aliases	private	property
Command::$application	private	property
Command::$applicationDefinitionMerged	private	property
Command::$applicationDefinitionMergedWithArgs	private	property
Command::$code	private	property
Command::$definition	private	property
Command::$description	private	property
Command::$help	private	property
Command::$helperSet	private	property
Command::$ignoreValidationErrors	private	property
Command::$name	private	property
Command::$processTitle	private	property
Command::$synopsis	private	property
Command::$usages	private	property
Command::addArgument	public	function	Adds an argument.
Command::addOption	public	function	Adds an option.
Command::addUsage	public	function	Add a command usage example.
Command::asText Deprecated	public	function	Returns a text representation of the command.
Command::asXml Deprecated	public	function	Returns an XML representation of the command.
Command::configure	protected	function	Configures the current command.	17
Command::execute	protected	function	Executes the current command.	14
Command::getAliases	public	function	Returns the aliases for the command.
Command::getApplication	public	function	Gets the application instance for this command.
Command::getDefinition	public	function	Gets the InputDefinition attached to this Command.
Command::getDescription	public	function	Returns the description for the command.
Command::getHelp	public	function	Returns the help for the command.
Command::getHelper	public	function	Gets a helper instance by name.
Command::getHelperSet	public	function	Gets the helper set.
Command::getName	public	function	Returns the command name.
Command::getNativeDefinition	public	function	Gets the InputDefinition to be used to create XML and Text representations of this Command.	1
Command::getProcessedHelp	public	function	Returns the processed help for the command replacing the %command.name% and %command.full_name% patterns with the real values dynamically.
Command::getSynopsis	public	function	Returns the synopsis for the command.
Command::getUsages	public	function	Returns alternative usages of the command.
Command::ignoreValidationErrors	public	function	Ignores validation errors.
Command::initialize	protected	function	Initializes the command just after the input has been validated.
Command::interact	protected	function	Interacts with the user.	2
Command::isEnabled	public	function	Checks whether the command is enabled or not in the current environment.
Command::mergeApplicationDefinition	public	function	Merges the application definition with the command definition.
Command::run	public	function	Runs the command.
Command::setAliases	public	function	Sets the aliases for the command.
Command::setApplication	public	function	Sets the application instance for this command.
Command::setCode	public	function	Sets the code to execute when running this command.
Command::setDefinition	public	function	Sets an array of argument and option instances.
Command::setDescription	public	function	Sets the description for the command.
Command::setHelp	public	function	Sets the help for the command.
Command::setHelperSet	public	function	Sets the helper set.
Command::setName	public	function	Sets the name of the command.
Command::setProcessTitle	public	function	Sets the process title of the command.
Command::validateName	private	function	Validates a command name.
Command::__construct	public	function	Constructor.	3