comparison vendor/symfony/console/Application.php @ 0:4c8ae668cc8c

Initial import (non-working)

+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console;
+
+use Symfony\Component\Console\Exception\ExceptionInterface;
+use Symfony\Component\Console\Formatter\OutputFormatter;
+use Symfony\Component\Console\Helper\DebugFormatterHelper;
+use Symfony\Component\Console\Helper\ProcessHelper;
+use Symfony\Component\Console\Helper\QuestionHelper;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\StreamableInputInterface;
+use Symfony\Component\Console\Input\ArgvInput;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Input\InputDefinition;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputAwareInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Output\ConsoleOutput;
+use Symfony\Component\Console\Output\ConsoleOutputInterface;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Command\HelpCommand;
+use Symfony\Component\Console\Command\ListCommand;
+use Symfony\Component\Console\Helper\HelperSet;
+use Symfony\Component\Console\Helper\FormatterHelper;
+use Symfony\Component\Console\Event\ConsoleCommandEvent;
+use Symfony\Component\Console\Event\ConsoleExceptionEvent;
+use Symfony\Component\Console\Event\ConsoleTerminateEvent;
+use Symfony\Component\Console\Exception\CommandNotFoundException;
+use Symfony\Component\Console\Exception\LogicException;
+use Symfony\Component\Debug\Exception\FatalThrowableError;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+
+/**
+ * An Application is the container for a collection of commands.
+ *
+ * It is the main entry point of a Console application.
+ *
+ * This class is optimized for a standard CLI environment.
+ *
+ * Usage:
+ *
+ *     $app = new Application('myapp', '1.0 (stable)');
+ *     $app->add(new SimpleCommand());
+ *     $app->run();
+ *
+ * @author Fabien Potencier <[e-mail]>
+ */
+class Application
+{
+    private $commands = array();
+    private $wantHelps = false;
+    private $runningCommand;
+    private $name;
+    private $version;
+    private $catchExceptions = true;
+    private $autoExit = true;
+    private $definition;
+    private $helperSet;
+    private $dispatcher;
+    private $terminal;
+    private $defaultCommand;
+    private $singleCommand;
+
+    /**
+     * @param string $name    The name of the application
+     * @param string $version The version of the application
+     */
+    public function __construct($name = 'UNKNOWN', $version = 'UNKNOWN')
+    {
+        $this->name = $name;
+        $this->version = $version;
+        $this->terminal = new Terminal();
+        $this->defaultCommand = 'list';
+        $this->helperSet = $this->getDefaultHelperSet();
+        $this->definition = $this->getDefaultInputDefinition();
+
+        foreach ($this->getDefaultCommands() as $command) {
+            $this->add($command);
+        }
+    }
+
+    public function setDispatcher(EventDispatcherInterface $dispatcher)
+    {
+        $this->dispatcher = $dispatcher;
+    }
+
+    /**
+     * Runs the current application.
+     *
+     * @param InputInterface  $input  An Input instance
+     * @param OutputInterface $output An Output instance
+     *
+     * @return int 0 if everything went fine, or an error code
+     *
+     * @throws \Exception When running fails. Bypass this when {@link setCatchExceptions()}.
+     */
+    public function run(InputInterface $input = null, OutputInterface $output = null)
+    {
+        putenv('LINES='.$this->terminal->getHeight());
+        putenv('COLUMNS='.$this->terminal->getWidth());
+
+        if (null === $input) {
+            $input = new ArgvInput();
+        }
+
+        if (null === $output) {
+            $output = new ConsoleOutput();
+        }
+
+        $this->configureIO($input, $output);
+
+        try {
+            $e = null;
+            $exitCode = $this->doRun($input, $output);
+        } catch (\Exception $x) {
+            $e = $x;
+        } catch (\Throwable $x) {
+            $e = new FatalThrowableError($x);
+        }
+
+        if (null !== $e) {
+            if (!$this->catchExceptions) {
+                throw $x;
+            }
+
+            if ($output instanceof ConsoleOutputInterface) {
+                $this->renderException($e, $output->getErrorOutput());
+            } else {
+                $this->renderException($e, $output);
+            }
+
+            $exitCode = $e->getCode();
+            if (is_numeric($exitCode)) {
+                $exitCode = (int) $exitCode;
+                if (0 === $exitCode) {
+                    $exitCode = 1;
+                }
+            } else {
+                $exitCode = 1;
+            }
+        }
+
+        if ($this->autoExit) {
+            if ($exitCode > 255) {
+                $exitCode = 255;
+            }
+
+            exit($exitCode);
+        }
+
+        return $exitCode;
+    }
+
+    /**
+     * Runs the current application.
+     *
+     * @param InputInterface  $input  An Input instance
+     * @param OutputInterface $output An Output instance
+     *
+     * @return int 0 if everything went fine, or an error code
+     */
+    public function doRun(InputInterface $input, OutputInterface $output)
+    {
+        if (true === $input->hasParameterOption(array('--version', '-V'), true)) {
+            $output->writeln($this->getLongVersion());
+
+            return 0;
+        }
+
+        $name = $this->getCommandName($input);
+        if (true === $input->hasParameterOption(array('--help', '-h'), true)) {
+            if (!$name) {
+                $name = 'help';
+                $input = new ArrayInput(array('command_name' => $this->defaultCommand));
+            } else {
+                $this->wantHelps = true;
+            }
+        }
+
+        if (!$name) {
+            $name = $this->defaultCommand;
+            $input = new ArrayInput(array('command' => $this->defaultCommand));
+        }
+
+        $this->runningCommand = null;
+        // the command name MUST be the first element of the input
+        $command = $this->find($name);
+
+        $this->runningCommand = $command;
+        $exitCode = $this->doRunCommand($command, $input, $output);
+        $this->runningCommand = null;
+
+        return $exitCode;
+    }
+
+    /**
+     * Set a helper set to be used with the command.
+     *
+     * @param HelperSet $helperSet The helper set
+     */
+    public function setHelperSet(HelperSet $helperSet)
+    {
+        $this->helperSet = $helperSet;
+    }
+
+    /**
+     * Get the helper set associated with the command.
+     *
+     * @return HelperSet The HelperSet instance associated with this command
+     */
+    public function getHelperSet()
+    {
+        return $this->helperSet;
+    }
+
+    /**
+     * Set an input definition to be used with this application.
+     *
+     * @param InputDefinition $definition The input definition
+     */
+    public function setDefinition(InputDefinition $definition)
+    {
+        $this->definition = $definition;
+    }
+
+    /**
+     * Gets the InputDefinition related to this Application.
+     *
+     * @return InputDefinition The InputDefinition instance
+     */
+    public function getDefinition()
+    {
+        if ($this->singleCommand) {
+            $inputDefinition = $this->definition;
+            $inputDefinition->setArguments();
+
+            return $inputDefinition;
+        }
+
+        return $this->definition;
+    }
+
+    /**
+     * Gets the help message.
+     *
+     * @return string A help message
+     */
+    public function getHelp()
+    {
+        return $this->getLongVersion();
+    }
+
+    /**
+     * Gets whether to catch exceptions or not during commands execution.
+     *
+     * @return bool Whether to catch exceptions or not during commands execution
+     */
+    public function areExceptionsCaught()
+    {
+        return $this->catchExceptions;
+    }
+
+    /**
+     * Sets whether to catch exceptions or not during commands execution.
+     *
+     * @param bool $boolean Whether to catch exceptions or not during commands execution
+     */
+    public function setCatchExceptions($boolean)
+    {
+        $this->catchExceptions = (bool) $boolean;
+    }
+
+    /**
+     * Gets whether to automatically exit after a command execution or not.
+     *
+     * @return bool Whether to automatically exit after a command execution or not
+     */
+    public function isAutoExitEnabled()
+    {
+        return $this->autoExit;
+    }
+
+    /**
+     * Sets whether to automatically exit after a command execution or not.
+     *
+     * @param bool $boolean Whether to automatically exit after a command execution or not
+     */
+    public function setAutoExit($boolean)
+    {
+        $this->autoExit = (bool) $boolean;
+    }
+
+    /**
+     * Gets the name of the application.
+     *
+     * @return string The application name
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Sets the application name.
+     *
+     * @param string $name The application name
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+    }
+
+    /**
+     * Gets the application version.
+     *
+     * @return string The application version
+     */
+    public function getVersion()
+    {
+        return $this->version;
+    }
+
+    /**
+     * Sets the application version.
+     *
+     * @param string $version The application version
+     */
+    public function setVersion($version)
+    {
+        $this->version = $version;
+    }
+
+    /**
+     * Returns the long version of the application.
+     *
+     * @return string The long application version
+     */
+    public function getLongVersion()
+    {
+        if ('UNKNOWN' !== $this->getName()) {
+            if ('UNKNOWN' !== $this->getVersion()) {
+                return sprintf('%s <info>%s</info>', $this->getName(), $this->getVersion());
+            }
+
+            return $this->getName();
+        }
+
+        return 'Console Tool';
+    }
+
+    /**
+     * Registers a new command.
+     *
+     * @param string $name The command name
+     *
+     * @return Command The newly created command
+     */
+    public function register($name)
+    {
+        return $this->add(new Command($name));
+    }
+
+    /**
+     * Adds an array of command objects.
+     *
+     * If a Command is not enabled it will not be added.
+     *
+     * @param Command[] $commands An array of commands
+     */
+    public function addCommands(array $commands)
+    {
+        foreach ($commands as $command) {
+            $this->add($command);
+        }
+    }
+
+    /**
+     * Adds a command object.
+     *
+     * If a command with the same name already exists, it will be overridden.
+     * If the command is not enabled it will not be added.
+     *
+     * @param Command $command A Command object
+     *
+     * @return Command|null The registered command if enabled or null
+     */
+    public function add(Command $command)
+    {
+        $command->setApplication($this);
+
+        if (!$command->isEnabled()) {
+            $command->setApplication(null);
+
+            return;
+        }
+
+        if (null === $command->getDefinition()) {
+            throw new LogicException(sprintf('Command class "%s" is not correctly initialized. You probably forgot to call the parent constructor.', get_class($command)));
+        }
+
+        $this->commands[$command->getName()] = $command;
+
+        foreach ($command->getAliases() as $alias) {
+            $this->commands[$alias] = $command;
+        }
+
+        return $command;
+    }
+
+    /**
+     * Returns a registered command by name or alias.
+     *
+     * @param string $name The command name or alias
+     *
+     * @return Command A Command object
+     *
+     * @throws CommandNotFoundException When given command name does not exist
+     */
+    public function get($name)
+    {
+        if (!isset($this->commands[$name])) {
+            throw new CommandNotFoundException(sprintf('The command "%s" does not exist.', $name));
+        }
+
+        $command = $this->commands[$name];
+
+        if ($this->wantHelps) {
+            $this->wantHelps = false;
+
+            $helpCommand = $this->get('help');
+            $helpCommand->setCommand($command);
+
+            return $helpCommand;
+        }
+
+        return $command;
+    }
+
+    /**
+     * Returns true if the command exists, false otherwise.
+     *
+     * @param string $name The command name or alias
+     *
+     * @return bool true if the command exists, false otherwise
+     */
+    public function has($name)
+    {
+        return isset($this->commands[$name]);
+    }
+
+    /**
+     * Returns an array of all unique namespaces used by currently registered commands.
+     *
+     * It does not return the global namespace which always exists.
+     *
+     * @return string[] An array of namespaces
+     */
+    public function getNamespaces()
+    {
+        $namespaces = array();
+        foreach ($this->all() as $command) {
+            $namespaces = array_merge($namespaces, $this->extractAllNamespaces($command->getName()));
+
+            foreach ($command->getAliases() as $alias) {
+                $namespaces = array_merge($namespaces, $this->extractAllNamespaces($alias));
+            }
+        }
+
+        return array_values(array_unique(array_filter($namespaces)));
+    }
+
+    /**
+     * Finds a registered namespace by a name or an abbreviation.
+     *
+     * @param string $namespace A namespace or abbreviation to search for
+     *
+     * @return string A registered namespace
+     *
+     * @throws CommandNotFoundException When namespace is incorrect or ambiguous
+     */
+    public function findNamespace($namespace)
+    {
+        $allNamespaces = $this->getNamespaces();
+        $expr = preg_replace_callback('{([^:]+|)}', function ($matches) { return preg_quote($matches[1]).'[^:]*'; }, $namespace);
+        $namespaces = preg_grep('{^'.$expr.'}', $allNamespaces);
+
+        if (empty($namespaces)) {
+            $message = sprintf('There are no commands defined in the "%s" namespace.', $namespace);
+
+            if ($alternatives = $this->findAlternatives($namespace, $allNamespaces)) {
+                if (1 == count($alternatives)) {
+                    $message .= "\n\nDid you mean this?\n    ";
+                } else {
+                    $message .= "\n\nDid you mean one of these?\n    ";
+                }
+
+                $message .= implode("\n    ", $alternatives);
+            }
+
+            throw new CommandNotFoundException($message, $alternatives);
+        }
+
+        $exact = in_array($namespace, $namespaces, true);
+        if (count($namespaces) > 1 && !$exact) {
+            throw new CommandNotFoundException(sprintf('The namespace "%s" is ambiguous (%s).', $namespace, $this->getAbbreviationSuggestions(array_values($namespaces))), array_values($namespaces));
+        }
+
+        return $exact ? $namespace : reset($namespaces);
+    }
+
+    /**
+     * Finds a command by name or alias.
+     *
+     * Contrary to get, this command tries to find the best
+     * match if you give it an abbreviation of a name or alias.
+     *
+     * @param string $name A command name or a command alias
+     *
+     * @return Command A Command instance
+     *
+     * @throws CommandNotFoundException When command name is incorrect or ambiguous
+     */
+    public function find($name)
+    {
+        $allCommands = array_keys($this->commands);
+        $expr = preg_replace_callback('{([^:]+|)}', function ($matches) { return preg_quote($matches[1]).'[^:]*'; }, $name);
+        $commands = preg_grep('{^'.$expr.'}', $allCommands);
+
+        if (empty($commands) || count(preg_grep('{^'.$expr.'$}', $commands)) < 1) {
+            if (false !== $pos = strrpos($name, ':')) {
+                // check if a namespace exists and contains commands
+                $this->findNamespace(substr($name, 0, $pos));
+            }
+
+            $message = sprintf('Command "%s" is not defined.', $name);
+
+            if ($alternatives = $this->findAlternatives($name, $allCommands)) {
+                if (1 == count($alternatives)) {
+                    $message .= "\n\nDid you mean this?\n    ";
+                } else {
+                    $message .= "\n\nDid you mean one of these?\n    ";
+                }
+                $message .= implode("\n    ", $alternatives);
+            }
+
+            throw new CommandNotFoundException($message, $alternatives);
+        }
+
+        // filter out aliases for commands which are already on the list
+        if (count($commands) > 1) {
+            $commandList = $this->commands;
+            $commands = array_filter($commands, function ($nameOrAlias) use ($commandList, $commands) {
+                $commandName = $commandList[$nameOrAlias]->getName();
+
+                return $commandName === $nameOrAlias || !in_array($commandName, $commands);
+            });
+        }
+
+        $exact = in_array($name, $commands, true);
+        if (count($commands) > 1 && !$exact) {
+            $suggestions = $this->getAbbreviationSuggestions(array_values($commands));
+
+            throw new CommandNotFoundException(sprintf('Command "%s" is ambiguous (%s).', $name, $suggestions), array_values($commands));
+        }
+
+        return $this->get($exact ? $name : reset($commands));
+    }
+
+    /**
+     * Gets the commands (registered in the given namespace if provided).
+     *
+     * The array keys are the full names and the values the command instances.
+     *
+     * @param string $namespace A namespace name
+     *
+     * @return Command[] An array of Command instances
+     */
+    public function all($namespace = null)
+    {
+        if (null === $namespace) {
+            return $this->commands;
+        }
+
+        $commands = array();
+        foreach ($this->commands as $name => $command) {
+            if ($namespace === $this->extractNamespace($name, substr_count($namespace, ':') + 1)) {
+                $commands[$name] = $command;
+            }
+        }
+
+        return $commands;
+    }
+
+    /**
+     * Returns an array of possible abbreviations given a set of names.
+     *
+     * @param array $names An array of names
+     *
+     * @return array An array of abbreviations
+     */
+    public static function getAbbreviations($names)
+    {
+        $abbrevs = array();
+        foreach ($names as $name) {
+            for ($len = strlen($name); $len > 0; --$len) {
+                $abbrev = substr($name, 0, $len);
+                $abbrevs[$abbrev][] = $name;
+            }
+        }
+
+        return $abbrevs;
+    }
+
+    /**
+     * Renders a caught exception.
+     *
+     * @param \Exception      $e      An exception instance
+     * @param OutputInterface $output An OutputInterface instance
+     */
+    public function renderException(\Exception $e, OutputInterface $output)
+    {
+        $output->writeln('', OutputInterface::VERBOSITY_QUIET);
+
+        do {
+            $title = sprintf(
+                '  [%s%s]  ',
+                get_class($e),
+                $output->isVerbose() && 0 !== ($code = $e->getCode()) ? ' ('.$code.')' : ''
+            );
+
+            $len = $this->stringWidth($title);
+
+            $width = $this->terminal->getWidth() ? $this->terminal->getWidth() - 1 : PHP_INT_MAX;
+            // HHVM only accepts 32 bits integer in str_split, even when PHP_INT_MAX is a 64 bit integer: https://github.com/facebook/hhvm/issues/1327
+            if (defined('HHVM_VERSION') && $width > 1 << 31) {
+                $width = 1 << 31;
+            }
+            $lines = array();
+            foreach (preg_split('/\r?\n/', $e->getMessage()) as $line) {
+                foreach ($this->splitStringByWidth($line, $width - 4) as $line) {
+                    // pre-format lines to get the right string length
+                    $lineLength = $this->stringWidth($line) + 4;
+                    $lines[] = array($line, $lineLength);
+
+                    $len = max($lineLength, $len);
+                }
+            }
+
+            $messages = array();
+            $messages[] = $emptyLine = sprintf('<error>%s</error>', str_repeat(' ', $len));
+            $messages[] = sprintf('<error>%s%s</error>', $title, str_repeat(' ', max(0, $len - $this->stringWidth($title))));
+            foreach ($lines as $line) {
+                $messages[] = sprintf('<error>  %s  %s</error>', OutputFormatter::escape($line[0]), str_repeat(' ', $len - $line[1]));
+            }
+            $messages[] = $emptyLine;
+            $messages[] = '';
+
+            $output->writeln($messages, OutputInterface::VERBOSITY_QUIET);
+
+            if (OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
+                $output->writeln('<comment>Exception trace:</comment>', OutputInterface::VERBOSITY_QUIET);
+
+                // exception related properties
+                $trace = $e->getTrace();
+                array_unshift($trace, array(
+                    'function' => '',
+                    'file' => $e->getFile() !== null ? $e->getFile() : 'n/a',
+                    'line' => $e->getLine() !== null ? $e->getLine() : 'n/a',
+                    'args' => array(),
+                ));
+
+                for ($i = 0, $count = count($trace); $i < $count; ++$i) {
+                    $class = isset($trace[$i]['class']) ? $trace[$i]['class'] : '';
+                    $type = isset($trace[$i]['type']) ? $trace[$i]['type'] : '';
+                    $function = $trace[$i]['function'];
+                    $file = isset($trace[$i]['file']) ? $trace[$i]['file'] : 'n/a';
+                    $line = isset($trace[$i]['line']) ? $trace[$i]['line'] : 'n/a';
+
+                    $output->writeln(sprintf(' %s%s%s() at <info>%s:%s</info>', $class, $type, $function, $file, $line), OutputInterface::VERBOSITY_QUIET);
+                }
+
+                $output->writeln('', OutputInterface::VERBOSITY_QUIET);
+            }
+        } while ($e = $e->getPrevious());
+
+        if (null !== $this->runningCommand) {
+            $output->writeln(sprintf('<info>%s</info>', sprintf($this->runningCommand->getSynopsis(), $this->getName())), OutputInterface::VERBOSITY_QUIET);
+            $output->writeln('', OutputInterface::VERBOSITY_QUIET);
+        }
+    }
+
+    /**
+     * Tries to figure out the terminal width in which this application runs.
+     *
+     * @return int|null
+     *
+     * @deprecated since version 3.2, to be removed in 4.0. Create a Terminal instance instead.
+     */
+    protected function getTerminalWidth()
+    {
+        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+
+        return $this->terminal->getWidth();
+    }
+
+    /**
+     * Tries to figure out the terminal height in which this application runs.
+     *
+     * @return int|null
+     *
+     * @deprecated since version 3.2, to be removed in 4.0. Create a Terminal instance instead.
+     */
+    protected function getTerminalHeight()
+    {
+        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+
+        return $this->terminal->getHeight();
+    }
+
+    /**
+     * Tries to figure out the terminal dimensions based on the current environment.
+     *
+     * @return array Array containing width and height
+     *
+     * @deprecated since version 3.2, to be removed in 4.0. Create a Terminal instance instead.
+     */
+    public function getTerminalDimensions()
+    {
+        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+
+        return array($this->terminal->getWidth(), $this->terminal->getHeight());
+    }
+
+    /**
+     * Sets terminal dimensions.
+     *
+     * Can be useful to force terminal dimensions for functional tests.
+     *
+     * @param int $width  The width
+     * @param int $height The height
+     *
+     * @return $this
+     *
+     * @deprecated since version 3.2, to be removed in 4.0. Set the COLUMNS and LINES env vars instead.
+     */
+    public function setTerminalDimensions($width, $height)
+    {
+        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Set the COLUMNS and LINES env vars instead.', __METHOD__), E_USER_DEPRECATED);
+
+        putenv('COLUMNS='.$width);
+        putenv('LINES='.$height);
+
+        return $this;
+    }
+
+    /**
+     * Configures the input and output instances based on the user arguments and options.
+     *
+     * @param InputInterface  $input  An InputInterface instance
+     * @param OutputInterface $output An OutputInterface instance
+     */
+    protected function configureIO(InputInterface $input, OutputInterface $output)
+    {
+        if (true === $input->hasParameterOption(array('--ansi'), true)) {
+            $output->setDecorated(true);
+        } elseif (true === $input->hasParameterOption(array('--no-ansi'), true)) {
+            $output->setDecorated(false);
+        }
+
+        if (true === $input->hasParameterOption(array('--no-interaction', '-n'), true)) {
+            $input->setInteractive(false);
+        } elseif (function_exists('posix_isatty')) {
+            $inputStream = null;
+
+            if ($input instanceof StreamableInputInterface) {
+                $inputStream = $input->getStream();
+            }
+
+            // This check ensures that calling QuestionHelper::setInputStream() works
+            // To be removed in 4.0 (in the same time as QuestionHelper::setInputStream)
+            if (!$inputStream && $this->getHelperSet()->has('question')) {
+                $inputStream = $this->getHelperSet()->get('question')->getInputStream(false);
+            }
+
+            if (!@posix_isatty($inputStream) && false === getenv('SHELL_INTERACTIVE')) {
+                $input->setInteractive(false);
+            }
+        }
+
+        if (true === $input->hasParameterOption(array('--quiet', '-q'), true)) {
+            $output->setVerbosity(OutputInterface::VERBOSITY_QUIET);
+            $input->setInteractive(false);
+        } else {
+            if ($input->hasParameterOption('-vvv', true) || $input->hasParameterOption('--verbose=3', true) || $input->getParameterOption('--verbose', false, true) === 3) {
+                $output->setVerbosity(OutputInterface::VERBOSITY_DEBUG);
+            } elseif ($input->hasParameterOption('-vv', true) || $input->hasParameterOption('--verbose=2', true) || $input->getParameterOption('--verbose', false, true) === 2) {
+                $output->setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE);
+            } elseif ($input->hasParameterOption('-v', true) || $input->hasParameterOption('--verbose=1', true) || $input->hasParameterOption('--verbose', true) || $input->getParameterOption('--verbose', false, true)) {
+                $output->setVerbosity(OutputInterface::VERBOSITY_VERBOSE);
+            }
+        }
+    }
+
+    /**
+     * Runs the current command.
+     *
+     * If an event dispatcher has been attached to the application,
+     * events are also dispatched during the life-cycle of the command.
+     *
+     * @param Command         $command A Command instance
+     * @param InputInterface  $input   An Input instance
+     * @param OutputInterface $output  An Output instance
+     *
+     * @return int 0 if everything went fine, or an error code
+     */
+    protected function doRunCommand(Command $command, InputInterface $input, OutputInterface $output)
+    {
+        foreach ($command->getHelperSet() as $helper) {
+            if ($helper instanceof InputAwareInterface) {
+                $helper->setInput($input);
+            }
+        }
+
+        if (null === $this->dispatcher) {
+            return $command->run($input, $output);
+        }
+
+        // bind before the console.command event, so the listeners have access to input options/arguments
+        try {
+            $command->mergeApplicationDefinition();
+            $input->bind($command->getDefinition());
+        } catch (ExceptionInterface $e) {
+            // ignore invalid options/arguments for now, to allow the event listeners to customize the InputDefinition
+        }
+
+        $event = new ConsoleCommandEvent($command, $input, $output);
+        $e = null;
+
+        try {
+            $this->dispatcher->dispatch(ConsoleEvents::COMMAND, $event);
+
+            if ($event->commandShouldRun()) {
+                $exitCode = $command->run($input, $output);
+            } else {
+                $exitCode = ConsoleCommandEvent::RETURN_CODE_DISABLED;
+            }
+        } catch (\Exception $e) {
+        } catch (\Throwable $e) {
+        }
+        if (null !== $e) {
+            $x = $e instanceof \Exception ? $e : new FatalThrowableError($e);
+            $event = new ConsoleExceptionEvent($command, $input, $output, $x, $x->getCode());
+            $this->dispatcher->dispatch(ConsoleEvents::EXCEPTION, $event);
+
+            if ($x !== $event->getException()) {
+                $e = $event->getException();
+            }
+            $exitCode = $e->getCode();
+        }
+
+        $event = new ConsoleTerminateEvent($command, $input, $output, $exitCode);
+        $this->dispatcher->dispatch(ConsoleEvents::TERMINATE, $event);
+
+        if (null !== $e) {
+            throw $e;
+        }
+
+        return $event->getExitCode();
+    }
+
+    /**
+     * Gets the name of the command based on input.
+     *
+     * @param InputInterface $input The input interface
+     *
+     * @return string The command name
+     */
+    protected function getCommandName(InputInterface $input)
+    {
+        return $this->singleCommand ? $this->defaultCommand : $input->getFirstArgument();
+    }
+
+    /**
+     * Gets the default input definition.
+     *
+     * @return InputDefinition An InputDefinition instance
+     */
+    protected function getDefaultInputDefinition()
+    {
+        return new InputDefinition(array(
+            new InputArgument('command', InputArgument::REQUIRED, 'The command to execute'),
+
+            new InputOption('--help', '-h', InputOption::VALUE_NONE, 'Display this help message'),
+            new InputOption('--quiet', '-q', InputOption::VALUE_NONE, 'Do not output any message'),
+            new InputOption('--verbose', '-v|vv|vvv', InputOption::VALUE_NONE, 'Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug'),
+            new InputOption('--version', '-V', InputOption::VALUE_NONE, 'Display this application version'),
+            new InputOption('--ansi', '', InputOption::VALUE_NONE, 'Force ANSI output'),
+            new InputOption('--no-ansi', '', InputOption::VALUE_NONE, 'Disable ANSI output'),
+            new InputOption('--no-interaction', '-n', InputOption::VALUE_NONE, 'Do not ask any interactive question'),
+        ));
+    }
+
+    /**
+     * Gets the default commands that should always be available.
+     *
+     * @return Command[] An array of default Command instances
+     */
+    protected function getDefaultCommands()
+    {
+        return array(new HelpCommand(), new ListCommand());
+    }
+
+    /**
+     * Gets the default helper set with the helpers that should always be available.
+     *
+     * @return HelperSet A HelperSet instance
+     */
+    protected function getDefaultHelperSet()
+    {
+        return new HelperSet(array(
+            new FormatterHelper(),
+            new DebugFormatterHelper(),
+            new ProcessHelper(),
+            new QuestionHelper(),
+        ));
+    }
+
+    /**
+     * Returns abbreviated suggestions in string format.
+     *
+     * @param array $abbrevs Abbreviated suggestions to convert
+     *
+     * @return string A formatted string of abbreviated suggestions
+     */
+    private function getAbbreviationSuggestions($abbrevs)
+    {
+        return sprintf('%s, %s%s', $abbrevs[0], $abbrevs[1], count($abbrevs) > 2 ? sprintf(' and %d more', count($abbrevs) - 2) : '');
+    }
+
+    /**
+     * Returns the namespace part of the command name.
+     *
+     * This method is not part of public API and should not be used directly.
+     *
+     * @param string $name  The full name of the command
+     * @param string $limit The maximum number of parts of the namespace
+     *
+     * @return string The namespace of the command
+     */
+    public function extractNamespace($name, $limit = null)
+    {
+        $parts = explode(':', $name);
+        array_pop($parts);
+
+        return implode(':', null === $limit ? $parts : array_slice($parts, 0, $limit));
+    }
+
+    /**
+     * Finds alternative of $name among $collection,
+     * if nothing is found in $collection, try in $abbrevs.
+     *
+     * @param string             $name       The string
+     * @param array|\Traversable $collection The collection
+     *
+     * @return string[] A sorted array of similar string
+     */
+    private function findAlternatives($name, $collection)
+    {
+        $threshold = 1e3;
+        $alternatives = array();
+
+        $collectionParts = array();
+        foreach ($collection as $item) {
+            $collectionParts[$item] = explode(':', $item);
+        }
+
+        foreach (explode(':', $name) as $i => $subname) {
+            foreach ($collectionParts as $collectionName => $parts) {
+                $exists = isset($alternatives[$collectionName]);
+                if (!isset($parts[$i]) && $exists) {
+                    $alternatives[$collectionName] += $threshold;
+                    continue;
+                } elseif (!isset($parts[$i])) {
+                    continue;
+                }
+
+                $lev = levenshtein($subname, $parts[$i]);
+                if ($lev <= strlen($subname) / 3 || '' !== $subname && false !== strpos($parts[$i], $subname)) {
+                    $alternatives[$collectionName] = $exists ? $alternatives[$collectionName] + $lev : $lev;
+                } elseif ($exists) {
+                    $alternatives[$collectionName] += $threshold;
+                }
+            }
+        }
+
+        foreach ($collection as $item) {
+            $lev = levenshtein($name, $item);
+            if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
+                $alternatives[$item] = isset($alternatives[$item]) ? $alternatives[$item] - $lev : $lev;
+            }
+        }
+
+        $alternatives = array_filter($alternatives, function ($lev) use ($threshold) { return $lev < 2 * $threshold; });
+        asort($alternatives);
+
+        return array_keys($alternatives);
+    }
+
+    /**
+     * Sets the default Command name.
+     *
+     * @param string $commandName     The Command name
+     * @param bool   $isSingleCommand Set to true if there is only one command in this application
+     *
+     * @return self
+     */
+    public function setDefaultCommand($commandName, $isSingleCommand = false)
+    {
+        $this->defaultCommand = $commandName;
+
+        if ($isSingleCommand) {
+            // Ensure the command exist
+            $this->find($commandName);
+
+            $this->singleCommand = true;
+        }
+
+        return $this;
+    }
+
+    private function stringWidth($string)
+    {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
+            return strlen($string);
+        }
+
+        return mb_strwidth($string, $encoding);
+    }
+
+    private function splitStringByWidth($string, $width)
+    {
+        // str_split is not suitable for multi-byte characters, we should use preg_split to get char array properly.
+        // additionally, array_slice() is not enough as some character has doubled width.
+        // we need a function to split string not by character count but by string width
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
+            return str_split($string, $width);
+        }
+
+        $utf8String = mb_convert_encoding($string, 'utf8', $encoding);
+        $lines = array();
+        $line = '';
+        foreach (preg_split('//u', $utf8String) as $char) {
+            // test if $char could be appended to current line
+            if (mb_strwidth($line.$char, 'utf8') <= $width) {
+                $line .= $char;
+                continue;
+            }
+            // if not, push current line to array and make new line
+            $lines[] = str_pad($line, $width);
+            $line = $char;
+        }
+        if ('' !== $line) {
+            $lines[] = count($lines) ? str_pad($line, $width) : $line;
+        }
+
+        mb_convert_variables($encoding, 'utf8', $lines);
+
+        return $lines;
+    }
+
+    /**
+     * Returns all namespaces of the command name.
+     *
+     * @param string $name The full name of the command
+     *
+     * @return string[] The namespaces of the command
+     */
+    private function extractAllNamespaces($name)
+    {
+        // -1 as third argument is needed to skip the command short name when exploding
+        $parts = explode(':', $name, -1);
+        $namespaces = array();
+
+        foreach ($parts as $part) {
+            if (count($namespaces)) {
+                $namespaces[] = end($namespaces).':'.$part;
+            } else {
+                $namespaces[] = $part;
+            }
+        }
+
+        return $namespaces;
+    }
+}