<h2>File Contents: /home/planet5/www/tracking/vendor/symfony/console/copy_of_Application.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/www/tracking/vendor/symfony/console/copy_of_Application.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * 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\CommandLoader\CommandLoaderInterface;
use Symfony\Component\Console\Exception\ExceptionInterface;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Helper\DebugFormatterHelper;
use Symfony\Component\Console\Helper\Helper;
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\ConsoleErrorEvent;
use Symfony\Component\Console\Event\ConsoleTerminateEvent;
use Symfony\Component\Console\Exception\CommandNotFoundException;
use Symfony\Component\Console\Exception\LogicException;
use Symfony\Component\Debug\ErrorHandler;
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(&#039;myapp&#039;, &#039;1.0 (stable)&#039;);
 *     $app-&gt;add(new SimpleCommand());
 *     $app-&gt;run();
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 */
class Application
{
    private $commands = array();
    private $wantHelps = false;
    private $runningCommand;
    private $name;
    private $version;
    private $commandLoader;
    private $catchExceptions = true;
    private $autoExit = true;
    private $definition;
    private $helperSet;
    private $dispatcher;
    private $terminal;
    private $defaultCommand;
    private $singleCommand;
    private $initialized;

    /**
     * @param string $name    The name of the application
     * @param string $version The version of the application
     */
    public function __construct(string $name = &#039;UNKNOWN&#039;, string $version = &#039;UNKNOWN&#039;)
    {
        $this-&gt;name = $name;
        $this-&gt;version = $version;
        $this-&gt;terminal = new Terminal();
        $this-&gt;defaultCommand = &#039;list&#039;;
    }

    public function setDispatcher(EventDispatcherInterface $dispatcher)
    {
        $this-&gt;dispatcher = $dispatcher;
    }

    public function setCommandLoader(CommandLoaderInterface $commandLoader)
    {
        $this-&gt;commandLoader = $commandLoader;
    }

    /**
     * Runs the current application.
     *
     * @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 $output = null)
    {
        putenv(&#039;LINES=&#039;.$this-&gt;terminal-&gt;getHeight());
        putenv(&#039;COLUMNS=&#039;.$this-&gt;terminal-&gt;getWidth());

        if (null === $input) {
            $input = new ArgvInput();
        }

        if (null === $output) {
            $output = new ConsoleOutput();
        }

        $renderException = function ($e) use ($output) {
            if (!$e instanceof \Exception) {
                $e = class_exists(FatalThrowableError::class) ? new FatalThrowableError($e) : new \ErrorException($e-&gt;getMessage(), $e-&gt;getCode(), E_ERROR, $e-&gt;getFile(), $e-&gt;getLine());
            }
            if ($output instanceof ConsoleOutputInterface) {
                $this-&gt;renderException($e, $output-&gt;getErrorOutput());
            } else {
                $this-&gt;renderException($e, $output);
            }
        };
        if ($phpHandler = set_exception_handler($renderException)) {
            restore_exception_handler();
            if (!is_array($phpHandler) || !$phpHandler[0] instanceof ErrorHandler) {
                $debugHandler = true;
            } elseif ($debugHandler = $phpHandler[0]-&gt;setExceptionHandler($renderException)) {
                $phpHandler[0]-&gt;setExceptionHandler($debugHandler);
            }
        }

        $this-&gt;configureIO($input, $output);

        try {
            $exitCode = $this-&gt;doRun($input, $output);
        } catch (\Exception $e) {
            if (!$this-&gt;catchExceptions) {
                throw $e;
            }

            $renderException($e);

            $exitCode = $e-&gt;getCode();
            if (is_numeric($exitCode)) {
                $exitCode = (int) $exitCode;
                if (0 === $exitCode) {
                    $exitCode = 1;
                }
            } else {
                $exitCode = 1;
            }
        } finally {
            // if the exception handler changed, keep it
            // otherwise, unregister $renderException
            if (!$phpHandler) {
                if (set_exception_handler($renderException) === $renderException) {
                    restore_exception_handler();
                }
                restore_exception_handler();
            } elseif (!$debugHandler) {
                $finalHandler = $phpHandler[0]-&gt;setExceptionHandler(null);
                if ($finalHandler !== $renderException) {
                    $phpHandler[0]-&gt;setExceptionHandler($finalHandler);
                }
            }
        }

        if ($this-&gt;autoExit) {
            if ($exitCode &gt; 255) {
                $exitCode = 255;
            }

            exit($exitCode);
        }

        return $exitCode;
    }

    /**
     * Runs the current application.
     *
     * @return int 0 if everything went fine, or an error code
     */
    public function doRun(InputInterface $input, OutputInterface $output)
    {
        if (true === $input-&gt;hasParameterOption(array(&#039;--version&#039;, &#039;-V&#039;), true)) {
            $output-&gt;writeln($this-&gt;getLongVersion());

            return 0;
        }

        $name = $this-&gt;getCommandName($input);
        if (true === $input-&gt;hasParameterOption(array(&#039;--help&#039;, &#039;-h&#039;), true)) {
            if (!$name) {
                $name = &#039;help&#039;;
                $input = new ArrayInput(array(&#039;command_name&#039; =&gt; $this-&gt;defaultCommand));
            } else {
                $this-&gt;wantHelps = true;
            }
        }

        if (!$name) {
            $name = $this-&gt;defaultCommand;
            $definition = $this-&gt;getDefinition();
            $definition-&gt;setArguments(array_merge(
                $definition-&gt;getArguments(),
                array(
                    &#039;command&#039; =&gt; new InputArgument(&#039;command&#039;, InputArgument::OPTIONAL, $definition-&gt;getArgument(&#039;command&#039;)-&gt;getDescription(), $name),
                )
            ));
        }

        try {
            $this-&gt;runningCommand = null;
            // the command name MUST be the first element of the input
            $command = $this-&gt;find($name);
        } catch (\Throwable $e) {
            if (null !== $this-&gt;dispatcher) {
                $event = new ConsoleErrorEvent($input, $output, $e);
                $this-&gt;dispatcher-&gt;dispatch(ConsoleEvents::ERROR, $event);

                if (0 === $event-&gt;getExitCode()) {
                    return 0;
                }

                $e = $event-&gt;getError();
            }

            throw $e;
        }

        $this-&gt;runningCommand = $command;
        $exitCode = $this-&gt;doRunCommand($command, $input, $output);
        $this-&gt;runningCommand = null;

        return $exitCode;
    }

    public function setHelperSet(HelperSet $helperSet)
    {
        $this-&gt;helperSet = $helperSet;
    }

    /**
     * Get the helper set associated with the command.
     *
     * @return HelperSet The HelperSet instance associated with this command
     */
    public function getHelperSet()
    {
        if (!$this-&gt;helperSet) {
            $this-&gt;helperSet = $this-&gt;getDefaultHelperSet();
        }

        return $this-&gt;helperSet;
    }

    public function setDefinition(InputDefinition $definition)
    {
        $this-&gt;definition = $definition;
    }

    /**
     * Gets the InputDefinition related to this Application.
     *
     * @return InputDefinition The InputDefinition instance
     */
    public function getDefinition()
    {
        if (!$this-&gt;definition) {
            $this-&gt;definition = $this-&gt;getDefaultInputDefinition();
        }

        if ($this-&gt;singleCommand) {
            $inputDefinition = $this-&gt;definition;
            $inputDefinition-&gt;setArguments();

            return $inputDefinition;
        }

        return $this-&gt;definition;
    }

    /**
     * Gets the help message.
     *
     * @return string A help message
     */
    public function getHelp()
    {
        return $this-&gt;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-&gt;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-&gt;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-&gt;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-&gt;autoExit = (bool) $boolean;
    }

    /**
     * Gets the name of the application.
     *
     * @return string The application name
     */
    public function getName()
    {
        return $this-&gt;name;
    }

    /**
     * Sets the application name.
     *
     * @param string $name The application name
     */
    public function setName($name)
    {
        $this-&gt;name = $name;
    }

    /**
     * Gets the application version.
     *
     * @return string The application version
     */
    public function getVersion()
    {
        return $this-&gt;version;
    }

    /**
     * Sets the application version.
     *
     * @param string $version The application version
     */
    public function setVersion($version)
    {
        $this-&gt;version = $version;
    }

    /**
     * Returns the long version of the application.
     *
     * @return string The long application version
     */
    public function getLongVersion()
    {
        if (&#039;UNKNOWN&#039; !== $this-&gt;getName()) {
            if (&#039;UNKNOWN&#039; !== $this-&gt;getVersion()) {
                return sprintf(&#039;%s &lt;info&gt;%s&lt;/info&gt;&#039;, $this-&gt;getName(), $this-&gt;getVersion());
            }

            return $this-&gt;getName();
        }

        return &#039;Console Tool&#039;;
    }

    /**
     * Registers a new command.
     *
     * @param string $name The command name
     *
     * @return Command The newly created command
     */
    public function register($name)
    {
        return $this-&gt;add(new Command($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) {
            $this-&gt;add($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.
     *
     * @return Command|null The registered command if enabled or null
     */
    public function add(Command $command)
    {
        $this-&gt;init();

        $command-&gt;setApplication($this);

        if (!$command-&gt;isEnabled()) {
            $command-&gt;setApplication(null);

            return;
        }

        if (null === $command-&gt;getDefinition()) {
            throw new LogicException(sprintf(&#039;Command class &quot;%s&quot; is not correctly initialized. You probably forgot to call the parent constructor.&#039;, get_class($command)));
        }

        if (!$command-&gt;getName()) {
            throw new LogicException(sprintf(&#039;The command defined in &quot;%s&quot; cannot have an empty name.&#039;, get_class($command)));
        }

        $this-&gt;commands[$command-&gt;getName()] = $command;

        foreach ($command-&gt;getAliases() as $alias) {
            $this-&gt;commands[$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)
    {
        $this-&gt;init();

        if (!$this-&gt;has($name)) {
            throw new CommandNotFoundException(sprintf(&#039;The command &quot;%s&quot; does not exist.&#039;, $name));
        }

        $command = $this-&gt;commands[$name];

        if ($this-&gt;wantHelps) {
            $this-&gt;wantHelps = false;

            $helpCommand = $this-&gt;get(&#039;help&#039;);
            $helpCommand-&gt;setCommand($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)
    {
        $this-&gt;init();

        return isset($this-&gt;commands[$name]) || ($this-&gt;commandLoader &amp;&amp; $this-&gt;commandLoader-&gt;has($name) &amp;&amp; $this-&gt;add($this-&gt;commandLoader-&gt;get($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-&gt;all() as $command) {
            $namespaces = array_merge($namespaces, $this-&gt;extractAllNamespaces($command-&gt;getName()));

            foreach ($command-&gt;getAliases() as $alias) {
                $namespaces = array_merge($namespaces, $this-&gt;extractAllNamespaces($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-&gt;getNamespaces();
        $expr = preg_replace_callback(&#039;{([^:]+|)}&#039;, function ($matches) { return preg_quote($matches[1]).&#039;[^:]*&#039;; }, $namespace);
        $namespaces = preg_grep(&#039;{^&#039;.$expr.&#039;}&#039;, $allNamespaces);

        if (empty($namespaces)) {
            $message = sprintf(&#039;There are no commands defined in the &quot;%s&quot; namespace.&#039;, $namespace);

            if ($alternatives = $this-&gt;findAlternatives($namespace, $allNamespaces)) {
                if (1 == count($alternatives)) {
                    $message .= &quot;\n\nDid you mean this?\n    &quot;;
                } else {
                    $message .= &quot;\n\nDid you mean one of these?\n    &quot;;
                }

                $message .= implode(&quot;\n    &quot;, $alternatives);
            }

            throw new CommandNotFoundException($message, $alternatives);
        }

        $exact = in_array($namespace, $namespaces, true);
        if (count($namespaces) &gt; 1 &amp;&amp; !$exact) {
            throw new CommandNotFoundException(sprintf(&quot;The namespace \&quot;%s\&quot; is ambiguous.\nDid you mean one of these?\n%s&quot;, $namespace, $this-&gt;getAbbreviationSuggestions(array_values($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)
    {
        $this-&gt;init();

        $aliases = array();
        $allCommands = $this-&gt;commandLoader ? array_merge($this-&gt;commandLoader-&gt;getNames(), array_keys($this-&gt;commands)) : array_keys($this-&gt;commands);
        $expr = preg_replace_callback(&#039;{([^:]+|)}&#039;, function ($matches) { return preg_quote($matches[1]).&#039;[^:]*&#039;; }, $name);
        $commands = preg_grep(&#039;{^&#039;.$expr.&#039;}&#039;, $allCommands);

        if (empty($commands)) {
            $commands = preg_grep(&#039;{^&#039;.$expr.&#039;}i&#039;, $allCommands);
        }

        // if no commands matched or we just matched namespaces
        if (empty($commands) || count(preg_grep(&#039;{^&#039;.$expr.&#039;$}i&#039;, $commands)) &lt; 1) {
            if (false !== $pos = strrpos($name, &#039;:&#039;)) {
                // check if a namespace exists and contains commands
                $this-&gt;findNamespace(substr($name, 0, $pos));
            }

            $message = sprintf(&#039;Command &quot;%s&quot; is not defined.&#039;, $name);

            if ($alternatives = $this-&gt;findAlternatives($name, $allCommands)) {
                if (1 == count($alternatives)) {
                    $message .= &quot;\n\nDid you mean this?\n    &quot;;
                } else {
                    $message .= &quot;\n\nDid you mean one of these?\n    &quot;;
                }
                $message .= implode(&quot;\n    &quot;, $alternatives);
            }

            throw new CommandNotFoundException($message, $alternatives);
        }

        // filter out aliases for commands which are already on the list
        if (count($commands) &gt; 1) {
            $commandList = $this-&gt;commandLoader ? array_merge(array_flip($this-&gt;commandLoader-&gt;getNames()), $this-&gt;commands) : $this-&gt;commands;
            $commands = array_unique(array_filter($commands, function ($nameOrAlias) use ($commandList, $commands, &amp;$aliases) {
                $commandName = $commandList[$nameOrAlias] instanceof Command ? $commandList[$nameOrAlias]-&gt;getName() : $nameOrAlias;
                $aliases[$nameOrAlias] = $commandName;

                return $commandName === $nameOrAlias || !in_array($commandName, $commands);
            }));
        }

        $exact = in_array($name, $commands, true) || isset($aliases[$name]);
        if (count($commands) &gt; 1 &amp;&amp; !$exact) {
            $usableWidth = $this-&gt;terminal-&gt;getWidth() - 10;
            $abbrevs = array_values($commands);
            $maxLen = 0;
            foreach ($abbrevs as $abbrev) {
                $maxLen = max(Helper::strlen($abbrev), $maxLen);
            }
            $abbrevs = array_map(function ($cmd) use ($commandList, $usableWidth, $maxLen) {
                if (!$commandList[$cmd] instanceof Command) {
                    return $cmd;
                }
                $abbrev = str_pad($cmd, $maxLen, &#039; &#039;).&#039; &#039;.$commandList[$cmd]-&gt;getDescription();

                return Helper::strlen($abbrev) &gt; $usableWidth ? Helper::substr($abbrev, 0, $usableWidth - 3).&#039;...&#039; : $abbrev;
            }, array_values($commands));
            $suggestions = $this-&gt;getAbbreviationSuggestions($abbrevs);

            throw new CommandNotFoundException(sprintf(&quot;Command \&quot;%s\&quot; is ambiguous.\nDid you mean one of these?\n%s&quot;, $name, $suggestions), array_values($commands));
        }

        return $this-&gt;get($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)
    {
        $this-&gt;init();

        if (null === $namespace) {
            if (!$this-&gt;commandLoader) {
                return $this-&gt;commands;
            }

            $commands = $this-&gt;commands;
            foreach ($this-&gt;commandLoader-&gt;getNames() as $name) {
                if (!isset($commands[$name]) &amp;&amp; $this-&gt;has($name)) {
                    $commands[$name] = $this-&gt;get($name);
                }
            }

            return $commands;
        }

        $commands = array();
        foreach ($this-&gt;commands as $name =&gt; $command) {
            if ($namespace === $this-&gt;extractNamespace($name, substr_count($namespace, &#039;:&#039;) + 1)) {
                $commands[$name] = $command;
            }
        }

        if ($this-&gt;commandLoader) {
            foreach ($this-&gt;commandLoader-&gt;getNames() as $name) {
                if (!isset($commands[$name]) &amp;&amp; $namespace === $this-&gt;extractNamespace($name, substr_count($namespace, &#039;:&#039;) + 1) &amp;&amp; $this-&gt;has($name)) {
                    $commands[$name] = $this-&gt;get($name);
                }
            }
        }

        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); $len &gt; 0; --$len) {
                $abbrev = substr($name, 0, $len);
                $abbrevs[$abbrev][] = $name;
            }
        }

        return $abbrevs;
    }

    /**
     * Renders a caught exception.
     */
    public function renderException(\Exception $e, OutputInterface $output)
    {
        $output-&gt;writeln(&#039;&#039;, OutputInterface::VERBOSITY_QUIET);

        $this-&gt;doRenderException($e, $output);

        if (null !== $this-&gt;runningCommand) {
            $output-&gt;writeln(sprintf(&#039;&lt;info&gt;%s&lt;/info&gt;&#039;, sprintf($this-&gt;runningCommand-&gt;getSynopsis(), $this-&gt;getName())), OutputInterface::VERBOSITY_QUIET);
            $output-&gt;writeln(&#039;&#039;, OutputInterface::VERBOSITY_QUIET);
        }
    }

    protected function doRenderException(\Exception $e, OutputInterface $output)
    {
        do {
            $message = trim($e-&gt;getMessage());
            if (&#039;&#039; === $message || OutputInterface::VERBOSITY_VERBOSE &lt;= $output-&gt;getVerbosity()) {
                $title = sprintf(&#039;  [%s%s]  &#039;, get_class($e), 0 !== ($code = $e-&gt;getCode()) ? &#039; (&#039;.$code.&#039;)&#039; : &#039;&#039;);
                $len = Helper::strlen($title);
            } else {
                $len = 0;
            }

            $width = $this-&gt;terminal-&gt;getWidth() ? $this-&gt;terminal-&gt;getWidth() - 1 : PHP_INT_MAX;
            $lines = array();
            foreach (&#039;&#039; !== $message ? preg_split(&#039;/\r?\n/&#039;, $message) : array() as $line) {
                foreach ($this-&gt;splitStringByWidth($line, $width - 4) as $line) {
                    // pre-format lines to get the right string length
                    $lineLength = Helper::strlen($line) + 4;
                    $lines[] = array($line, $lineLength);

                    $len = max($lineLength, $len);
                }
            }

            $messages = array();
            if (!$e instanceof ExceptionInterface || OutputInterface::VERBOSITY_VERBOSE &lt;= $output-&gt;getVerbosity()) {
                $messages[] = sprintf(&#039;&lt;comment&gt;%s&lt;/comment&gt;&#039;, OutputFormatter::escape(sprintf(&#039;In %s line %s:&#039;, basename($e-&gt;getFile()) ?: &#039;n/a&#039;, $e-&gt;getLine() ?: &#039;n/a&#039;)));
            }
            $messages[] = $emptyLine = sprintf(&#039;&lt;error&gt;%s&lt;/error&gt;&#039;, str_repeat(&#039; &#039;, $len));
            if (&#039;&#039; === $message || OutputInterface::VERBOSITY_VERBOSE &lt;= $output-&gt;getVerbosity()) {
                $messages[] = sprintf(&#039;&lt;error&gt;%s%s&lt;/error&gt;&#039;, $title, str_repeat(&#039; &#039;, max(0, $len - Helper::strlen($title))));
            }
            foreach ($lines as $line) {
                $messages[] = sprintf(&#039;&lt;error&gt;  %s  %s&lt;/error&gt;&#039;, OutputFormatter::escape($line[0]), str_repeat(&#039; &#039;, $len - $line[1]));
            }
            $messages[] = $emptyLine;
            $messages[] = &#039;&#039;;

            $output-&gt;writeln($messages, OutputInterface::VERBOSITY_QUIET);

            if (OutputInterface::VERBOSITY_VERBOSE &lt;= $output-&gt;getVerbosity()) {
                $output-&gt;writeln(&#039;&lt;comment&gt;Exception trace:&lt;/comment&gt;&#039;, OutputInterface::VERBOSITY_QUIET);

                // exception related properties
                $trace = $e-&gt;getTrace();

                for ($i = 0, $count = count($trace); $i &lt; $count; ++$i) {
                    $class = isset($trace[$i][&#039;class&#039;]) ? $trace[$i][&#039;class&#039;] : &#039;&#039;;
                    $type = isset($trace[$i][&#039;type&#039;]) ? $trace[$i][&#039;type&#039;] : &#039;&#039;;
                    $function = $trace[$i][&#039;function&#039;];
                    $file = isset($trace[$i][&#039;file&#039;]) ? $trace[$i][&#039;file&#039;] : &#039;n/a&#039;;
                    $line = isset($trace[$i][&#039;line&#039;]) ? $trace[$i][&#039;line&#039;] : &#039;n/a&#039;;

                    $output-&gt;writeln(sprintf(&#039; %s%s%s() at &lt;info&gt;%s:%s&lt;/info&gt;&#039;, $class, $type, $function, $file, $line), OutputInterface::VERBOSITY_QUIET);
                }

                $output-&gt;writeln(&#039;&#039;, OutputInterface::VERBOSITY_QUIET);
            }
        } while ($e = $e-&gt;getPrevious());
    }

    /**
     * Configures the input and output instances based on the user arguments and options.
     */
    protected function configureIO(InputInterface $input, OutputInterface $output)
    {
        if (true === $input-&gt;hasParameterOption(array(&#039;--ansi&#039;), true)) {
            $output-&gt;setDecorated(true);
        } elseif (true === $input-&gt;hasParameterOption(array(&#039;--no-ansi&#039;), true)) {
            $output-&gt;setDecorated(false);
        }

        if (true === $input-&gt;hasParameterOption(array(&#039;--no-interaction&#039;, &#039;-n&#039;), true)) {
            $input-&gt;setInteractive(false);
        } elseif (function_exists(&#039;posix_isatty&#039;)) {
            $inputStream = null;

            if ($input instanceof StreamableInputInterface) {
                $inputStream = $input-&gt;getStream();
            }

            if (!@posix_isatty($inputStream) &amp;&amp; false === getenv(&#039;SHELL_INTERACTIVE&#039;)) {
                $input-&gt;setInteractive(false);
            }
        }

        switch ($shellVerbosity = (int) getenv(&#039;SHELL_VERBOSITY&#039;)) {
            case -1: $output-&gt;setVerbosity(OutputInterface::VERBOSITY_QUIET); break;
            case 1: $output-&gt;setVerbosity(OutputInterface::VERBOSITY_VERBOSE); break;
            case 2: $output-&gt;setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE); break;
            case 3: $output-&gt;setVerbosity(OutputInterface::VERBOSITY_DEBUG); break;
            default: $shellVerbosity = 0; break;
        }

        if (true === $input-&gt;hasParameterOption(array(&#039;--quiet&#039;, &#039;-q&#039;), true)) {
            $output-&gt;setVerbosity(OutputInterface::VERBOSITY_QUIET);
            $shellVerbosity = -1;
        } else {
            if ($input-&gt;hasParameterOption(&#039;-vvv&#039;, true) || $input-&gt;hasParameterOption(&#039;--verbose=3&#039;, true) || 3 === $input-&gt;getParameterOption(&#039;--verbose&#039;, false, true)) {
                $output-&gt;setVerbosity(OutputInterface::VERBOSITY_DEBUG);
                $shellVerbosity = 3;
            } elseif ($input-&gt;hasParameterOption(&#039;-vv&#039;, true) || $input-&gt;hasParameterOption(&#039;--verbose=2&#039;, true) || 2 === $input-&gt;getParameterOption(&#039;--verbose&#039;, false, true)) {
                $output-&gt;setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE);
                $shellVerbosity = 2;
            } elseif ($input-&gt;hasParameterOption(&#039;-v&#039;, true) || $input-&gt;hasParameterOption(&#039;--verbose=1&#039;, true) || $input-&gt;hasParameterOption(&#039;--verbose&#039;, true) || $input-&gt;getParameterOption(&#039;--verbose&#039;, false, true)) {
                $output-&gt;setVerbosity(OutputInterface::VERBOSITY_VERBOSE);
                $shellVerbosity = 1;
            }
        }

        if (-1 === $shellVerbosity) {
            $input-&gt;setInteractive(false);
        }

        putenv(&#039;SHELL_VERBOSITY=&#039;.$shellVerbosity);
        $_ENV[&#039;SHELL_VERBOSITY&#039;] = $shellVerbosity;
        $_SERVER[&#039;SHELL_VERBOSITY&#039;] = $shellVerbosity;
    }

    /**
     * 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.
     *
     * @return int 0 if everything went fine, or an error code
     */
    protected function doRunCommand(Command $command, InputInterface $input, OutputInterface $output)
    {
        foreach ($command-&gt;getHelperSet() as $helper) {
            if ($helper instanceof InputAwareInterface) {
                $helper-&gt;setInput($input);
            }
        }

        if (null === $this-&gt;dispatcher) {
            return $command-&gt;run($input, $output);
        }

        // bind before the console.command event, so the listeners have access to input options/arguments
        try {
            $command-&gt;mergeApplicationDefinition();
            $input-&gt;bind($command-&gt;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-&gt;dispatcher-&gt;dispatch(ConsoleEvents::COMMAND, $event);

            if ($event-&gt;commandShouldRun()) {
                $exitCode = $command-&gt;run($input, $output);
            } else {
                $exitCode = ConsoleCommandEvent::RETURN_CODE_DISABLED;
            }
        } catch (\Throwable $e) {
            $event = new ConsoleErrorEvent($input, $output, $e, $command);
            $this-&gt;dispatcher-&gt;dispatch(ConsoleEvents::ERROR, $event);
            $e = $event-&gt;getError();

            if (0 === $exitCode = $event-&gt;getExitCode()) {
                $e = null;
            }
        }

        $event = new ConsoleTerminateEvent($command, $input, $output, $exitCode);
        $this-&gt;dispatcher-&gt;dispatch(ConsoleEvents::TERMINATE, $event);

        if (null !== $e) {
            throw $e;
        }

        return $event-&gt;getExitCode();
    }

    /**
     * Gets the name of the command based on input.
     *
     * @return string The command name
     */
    protected function getCommandName(InputInterface $input)
    {
        return $this-&gt;singleCommand ? $this-&gt;defaultCommand : $input-&gt;getFirstArgument();
    }

    /**
     * Gets the default input definition.
     *
     * @return InputDefinition An InputDefinition instance
     */
    protected function getDefaultInputDefinition()
    {
        return new InputDefinition(array(
            new InputArgument(&#039;command&#039;, InputArgument::REQUIRED, &#039;The command to execute&#039;),

            new InputOption(&#039;--help&#039;, &#039;-h&#039;, InputOption::VALUE_NONE, &#039;Display this help message&#039;),
            new InputOption(&#039;--quiet&#039;, &#039;-q&#039;, InputOption::VALUE_NONE, &#039;Do not output any message&#039;),
            new InputOption(&#039;--verbose&#039;, &#039;-v|vv|vvv&#039;, InputOption::VALUE_NONE, &#039;Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug&#039;),
            new InputOption(&#039;--version&#039;, &#039;-V&#039;, InputOption::VALUE_NONE, &#039;Display this application version&#039;),
            new InputOption(&#039;--ansi&#039;, &#039;&#039;, InputOption::VALUE_NONE, &#039;Force ANSI output&#039;),
            new InputOption(&#039;--no-ansi&#039;, &#039;&#039;, InputOption::VALUE_NONE, &#039;Disable ANSI output&#039;),
            new InputOption(&#039;--no-interaction&#039;, &#039;-n&#039;, InputOption::VALUE_NONE, &#039;Do not ask any interactive question&#039;),
        ));
    }

    /**
     * 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 &#039;    &#039;.implode(&quot;\n    &quot;, $abbrevs);
    }

    /**
     * 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(&#039;:&#039;, $name);
        array_pop($parts);

        return implode(&#039;:&#039;, 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 iterable $collection The collection
     *
     * @return string[] A sorted array of similar string
     */
    private function findAlternatives($name, $collection)
    {
        $threshold = 1e3;
        $alternatives = array();

        $collectionParts = array();
        foreach ($collection as $item) {
            $collectionParts[$item] = explode(&#039;:&#039;, $item);
        }

        foreach (explode(&#039;:&#039;, $name) as $i =&gt; $subname) {
            foreach ($collectionParts as $collectionName =&gt; $parts) {
                $exists = isset($alternatives[$collectionName]);
                if (!isset($parts[$i]) &amp;&amp; $exists) {
                    $alternatives[$collectionName] += $threshold;
                    continue;
                } elseif (!isset($parts[$i])) {
                    continue;
                }

                $lev = levenshtein($subname, $parts[$i]);
                if ($lev &lt;= strlen($subname) / 3 || &#039;&#039; !== $subname &amp;&amp; false !== strpos($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 &lt;= 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 &lt; 2 * $threshold; });
        ksort($alternatives, SORT_NATURAL | SORT_FLAG_CASE);

        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-&gt;defaultCommand = $commandName;

        if ($isSingleCommand) {
            // Ensure the command exist
            $this-&gt;find($commandName);

            $this-&gt;singleCommand = true;
        }

        return $this;
    }

    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, &#039;utf8&#039;, $encoding);
        $lines = array();
        $line = &#039;&#039;;
        foreach (preg_split(&#039;//u&#039;, $utf8String) as $char) {
            // test if $char could be appended to current line
            if (mb_strwidth($line.$char, &#039;utf8&#039;) &lt;= $width) {
                $line .= $char;
                continue;
            }
            // if not, push current line to array and make new line
            $lines[] = str_pad($line, $width);
            $line = $char;
        }

        $lines[] = count($lines) ? str_pad($line, $width) : $line;

        mb_convert_variables($encoding, &#039;utf8&#039;, $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(&#039;:&#039;, $name, -1);
        $namespaces = array();

        foreach ($parts as $part) {
            if (count($namespaces)) {
                $namespaces[] = end($namespaces).&#039;:&#039;.$part;
            } else {
                $namespaces[] = $part;
            }
        }

        return $namespaces;
    }

    private function init()
    {
        if ($this-&gt;initialized) {
            return;
        }
        $this-&gt;initialized = true;

        foreach ($this-&gt;getDefaultCommands() as $command) {
            $this-&gt;add($command);
        }
    }
}
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