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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Command;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Application;
use Symfony\Component\Console\Helper\HelperSet;
/**
* Base class for all commands.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
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 $name The name of the command; passing null means it must be set in configure()
*
* @throws \LogicException When the command name is empty
*
* @api
*/
public function __construct($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
*
* @api
*/
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
*
* @api
*/
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()
*
* @api
*/
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);
}
$input->validate();
if ($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 $output)
*
* @return Command The current instance
*
* @throws \InvalidArgumentException
*
* @see execute()
*
* @api
*/
public function setCode($code)
{
if (!is_callable($code)) {
throw new \InvalidArgumentException('Invalid callable provided to Command::setCode.');
}
if (PHP_VERSION_ID >= 50400 && $code instanceof \Closure) {
$r = new \ReflectionFunction($code);
if (null === $r->getClosureThis()) {
$code = \Closure::bind($code, $this);
}
}
$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 $definition An array of argument and option instances or a definition instance
*
* @return Command The current instance
*
* @api
*/
public function setDefinition($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
*
* @api
*/
public function getDefinition()
{
return $this->definition;
}
/**
* Gets the InputDefinition to be used to create 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 $default The default value (for InputArgument::OPTIONAL mode only)
*
* @return Command The current instance
*
* @api
*/
public function addArgument($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 $default The default value (must be null for InputOption::VALUE_REQUIRED or InputOption::VALUE_NONE)
*
* @return Command The current instance
*
* @api
*/
public function addOption($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 $name The command name
*
* @return Command The current instance
*
* @throws \InvalidArgumentException When the name is invalid
*
* @api
*/
public function setName($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
*
* @api
*/
public function getName()
{
return $this->name;
}
/**
* Sets the description for the command.
*
* @param string $description The description for the command
*
* @return Command The current instance
*
* @api
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Returns the description for the command.
*
* @return string The description for the command
*
* @api
*/
public function getDescription()
{
return $this->description;
}
/**
* Sets the help for the command.
*
* @param string $help The help for the command
*
* @return Command The current instance
*
* @api
*/
public function setHelp($help)
{
$this->help = $help;
return $this;
}
/**
* Returns the help for the command.
*
* @return string The help for the command
*
* @api
*/
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());
}
/**
* Sets the aliases for the command.
*
* @param string[] $aliases An array of aliases for the command
*
* @return Command The current instance
*
* @throws \InvalidArgumentException When an alias is invalid
*
* @api
*/
public function setAliases($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
*
* @api
*/
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 $name The helper name
*
* @return mixed The helper value
*
* @throws \InvalidArgumentException if the helper is not defined
*
* @api
*/
public function getHelper($name)
{
return $this->helperSet->get($name);
}
/**
* 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));
}
}
}
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