<?php

/*

* This file is part of the Symfony package.

*

* (c) Fabien Potencier <[email protected]>

*

* 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\Descriptor\TextDescriptor;

use Symfony\Component\Console\Descriptor\XmlDescriptor;

use Symfony\Component\Console\Helper\QuestionHelper;

use Symfony\Component\Console\Input\InputInterface;

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\BufferedOutput;

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\Helper\DialogHelper;

use Symfony\Component\Console\Helper\ProgressHelper;

use Symfony\Component\Console\Helper\TableHelper;

use Symfony\Component\Console\Event\ConsoleCommandEvent;

use Symfony\Component\Console\Event\ConsoleExceptionEvent;

use Symfony\Component\Console\Event\ConsoleTerminateEvent;

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 <[email protected]>

*

* @api

*/

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 $terminalDimensions;

private $defaultCommand;

/**

* Constructor.

*

* @param string $name The name of the application

* @param string $version The version of the application

*

* @api

*/

public function __construct($name = 'UNKNOWN', $version = 'UNKNOWN')

{

$this->name = $name;

$this->version = $version;

$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 doRun returns Exception

*

* @api

*/

public function run(InputInterface $input = null, OutputInterface $output = null)

{

if (null === $input) {

$input = new ArgvInput();

}

if (null === $output) {

$output = new ConsoleOutput();

}

$this->configureIO($input, $output);

try {

$exitCode = $this->doRun($input, $output);

} catch (\Exception $e) {

if (!$this->catchExceptions) {

throw $e;

}

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'))) {

$output->writeln($this->getLongVersion());

return 0;

}

$name = $this->getCommandName($input);

if (true === $input->hasParameterOption(array('--help', '-h'))) {

if (!$name) {

$name = 'help';

$input = new ArrayInput(array('command' => 'help'));

} else {

$this->wantHelps = true;

}

}

if (!$name) {

$name = $this->defaultCommand;

$input = new ArrayInput(array('command' => $this->defaultCommand));

}

// 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

*

* @api

*/

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

*

* @api

*/

public function getHelperSet()

{

return $this->helperSet;

}

/**

* Set an input definition set to be used with this application.

*

* @param InputDefinition $definition The input definition

*

* @api

*/

public function setDefinition(InputDefinition $definition)

{

$this->definition = $definition;

}

/**

* Gets the InputDefinition related to this Application.

*

* @return InputDefinition The InputDefinition instance

*/

public function getDefinition()

{

return $this->definition;

}

/**

* Gets the help message.

*

* @return string A help message.

*/

public function getHelp()

{

$messages = array(

$this->getLongVersion(),

'',

'<comment>Usage:</comment>',

' [options] command [arguments]',

'',

'<comment>Options:</comment>',

);

foreach ($this->getDefinition()->getOptions() as $option) {

$messages[] = sprintf(' %-29s %s %s',

'<info>--'.$option->getName().'</info>',

$option->getShortcut() ? '<info>-'.$option->getShortcut().'</info>' : ' ',

$option->getDescription()

);

}

return implode(PHP_EOL, $messages);

}

/**

* Sets whether to catch exceptions or not during commands execution.

*

* @param bool $boolean Whether to catch exceptions or not during commands execution

*

* @api

*/

public function setCatchExceptions($boolean)

{

$this->catchExceptions = (bool) $boolean;

}

/**

* Sets whether to automatically exit after a command execution or not.

*

* @param bool $boolean Whether to automatically exit after a command execution or not

*

* @api

*/

public function setAutoExit($boolean)

{

$this->autoExit = (bool) $boolean;

}

/**

* Gets the name of the application.

*

* @return string The application name

*

* @api

*/

public function getName()

{

return $this->name;

}

/**

* Sets the application name.

*

* @param string $name The application name

*

* @api

*/

public function setName($name)

{

$this->name = $name;

}

/**

* Gets the application version.

*

* @return string The application version

*

* @api

*/

public function getVersion()

{

return $this->version;

}

/**

* Sets the application version.

*

* @param string $version The application version

*

* @api

*/

public function setVersion($version)

{

$this->version = $version;

}

/**

* Returns the long version of the application.

*

* @return string The long application version

*

* @api

*/

public function getLongVersion()

{

if ('UNKNOWN' !== $this->getName() && 'UNKNOWN' !== $this->getVersion()) {

return sprintf('<info>%s</info> version <comment>%s</comment>', $this->getName(), $this->getVersion());

}

return '<info>Console Tool</info>';

}

/**

* Registers a new command.

*

* @param string $name The command name

*

* @return Command The newly created command

*

* @api

*/

public function register($name)

{

return $this->add(new Command($name));

}

/**

* Adds an array of command objects.

*

* @param Command[] $commands An array of commands

*

* @api

*/

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.

*

* @param Command $command A Command object

*

* @return Command The registered command

*

* @api

*/

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 \InvalidArgumentException When command name given does not exist

*

* @api

*/

public function get($name)

{

if (!isset($this->commands[$name])) {

throw new \InvalidArgumentException(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

*

* @api

*/

public function has($name)

{

return isset($this->commands[$name]);

}

/**

* Returns an array of all unique namespaces used by currently registered commands.

*

* It does not returns the global namespace which always exists.

*

* @return array An array of namespaces

*/

public function getNamespaces()

{

$namespaces = array();

foreach ($this->commands 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 \InvalidArgumentException 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, array())) {

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 \InvalidArgumentException($message);

}

$exact = in_array($namespace, $namespaces, true);

if (count($namespaces) > 1 && !$exact) {

throw new \InvalidArgumentException(sprintf('The namespace "%s" is ambiguous (%s).', $namespace, $this->getAbbreviationSuggestions(array_values($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 \InvalidArgumentException When command name is incorrect or ambiguous

*

* @api

*/

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, array())) {

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 \InvalidArgumentException($message);

}

// 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 \InvalidArgumentException(sprintf('Command "%s" is ambiguous (%s).', $name, $suggestions));

}

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

*

* @api

*/

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;

}

/**

* Returns a text representation of the Application.

*

* @param string $namespace An optional namespace name

* @param bool $raw Whether to return raw command list

*

* @return string A string representing the Application

*

* @deprecated Deprecated since version 2.3, to be removed in 3.0.

*/

public function asText($namespace = null, $raw = false)

{

$descriptor = new TextDescriptor();

$output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, !$raw);

$descriptor->describe($output, $this, array('namespace' => $namespace, 'raw_output' => true));

return $output->fetch();

}

/**

* Returns an XML representation of the Application.

*

* @param string $namespace An optional namespace name

* @param bool $asDom Whether to return a DOM or an XML string

*

* @return string|\DOMDocument An XML string representing the Application

*

* @deprecated Deprecated since version 2.3, to be removed in 3.0.

*/

public function asXml($namespace = null, $asDom = false)

{

$descriptor = new XmlDescriptor();

if ($asDom) {

return $descriptor->getApplicationDocument($this, $namespace);

}

$output = new BufferedOutput();

$descriptor->describe($output, $this, array('namespace' => $namespace));

return $output->fetch();

}

/**

* Renders a caught exception.

*

* @param \Exception $e An exception instance

* @param OutputInterface $output An OutputInterface instance

*/

public function renderException($e, $output)

{

do {

$title = sprintf(' [%s] ', get_class($e));

$len = $this->stringWidth($title);

$width = $this->getTerminalWidth() ? $this->getTerminalWidth() - 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;

}

$formatter = $output->getFormatter();

$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(preg_replace('/\[[^m]*m/', '', $formatter->format($line))) + 4;

$lines[] = array($line, $lineLength);

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

}

}

$messages = array('', '');

$messages[] = $emptyLine = $formatter->format(sprintf('<error>%s</error>', str_repeat(' ', $len)));

$messages[] = $formatter->format(sprintf('<error>%s%s</error>', $title, str_repeat(' ', max(0, $len - $this->stringWidth($title)))));

foreach ($lines as $line) {

$messages[] = $formatter->format(sprintf('<error> %s %s</error>', $line[0], str_repeat(' ', $len - $line[1])));

}

$messages[] = $emptyLine;

$messages[] = '';

$messages[] = '';

$output->writeln($messages, OutputInterface::OUTPUT_RAW);

if (OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {

$output->writeln('<comment>Exception trace:</comment>');

// 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));

}

$output->writeln("");

$output->writeln("");

}

} while ($e = $e->getPrevious());

if (null !== $this->runningCommand) {

$output->writeln(sprintf('<info>%s</info>', sprintf($this->runningCommand->getSynopsis(), $this->getName())));

$output->writeln("");

$output->writeln("");

}

}

/**

* Tries to figure out the terminal width in which this application runs.

*

* @return int|null

*/

protected function getTerminalWidth()

{

$dimensions = $this->getTerminalDimensions();

return $dimensions[0];

}

/**

* Tries to figure out the terminal height in which this application runs.

*

* @return int|null

*/

protected function getTerminalHeight()

{

$dimensions = $this->getTerminalDimensions();

return $dimensions[1];

}

/**

* Tries to figure out the terminal dimensions based on the current environment.

*

* @return array Array containing width and height

*/

public function getTerminalDimensions()

{

if ($this->terminalDimensions) {

return $this->terminalDimensions;

}

if ('\\' === DIRECTORY_SEPARATOR) {

// extract [w, H] from "wxh (WxH)"

if (preg_match('/^(\d+)x\d+ \(\d+x(\d+)\)$/', trim(getenv('ANSICON')), $matches)) {

return array((int) $matches[1], (int) $matches[2]);

}

// extract [w, h] from "wxh"

if (preg_match('/^(\d+)x(\d+)$/', $this->getConsoleMode(), $matches)) {

return array((int) $matches[1], (int) $matches[2]);

}

}

if ($sttyString = $this->getSttyColumns()) {

// extract [w, h] from "rows h; columns w;"

if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) {

return array((int) $matches[2], (int) $matches[1]);

}

// extract [w, h] from "; h rows; w columns"

if (preg_match('/;.(\d+).rows;.(\d+).columns/i', $sttyString, $matches)) {

return array((int) $matches[2], (int) $matches[1]);

}

}

return array(null, null);

}

/**

* Sets terminal dimensions.

*

* Can be useful to force terminal dimensions for functional tests.

*

* @param int $width The width

* @param int $height The height

*

* @return Application The current application

*/

public function setTerminalDimensions($width, $height)

{

$this->terminalDimensions = array($width, $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'))) {

$output->setDecorated(true);

} elseif (true === $input->hasParameterOption(array('--no-ansi'))) {

$output->setDecorated(false);

}

if (true === $input->hasParameterOption(array('--no-interaction', '-n'))) {

$input->setInteractive(false);

} elseif (function_exists('posix_isatty') && $this->getHelperSet()->has('question')) {

$inputStream = $this->getHelperSet()->get('question')->getInputStream();

if (!@posix_isatty($inputStream)) {

$input->setInteractive(false);

}

}

if (true === $input->hasParameterOption(array('--quiet', '-q'))) {

$output->setVerbosity(OutputInterface::VERBOSITY_QUIET);

} else {

if ($input->hasParameterOption('-vvv') || $input->hasParameterOption('--verbose=3') || $input->getParameterOption('--verbose') === 3) {

$output->setVerbosity(OutputInterface::VERBOSITY_DEBUG);

} elseif ($input->hasParameterOption('-vv') || $input->hasParameterOption('--verbose=2') || $input->getParameterOption('--verbose') === 2) {

$output->setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE);

} elseif ($input->hasParameterOption('-v') || $input->hasParameterOption('--verbose=1') || $input->hasParameterOption('--verbose') || $input->getParameterOption('--verbose')) {

$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

*

* @throws \Exception when the command being run threw an exception

*/

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);

}

$event = new ConsoleCommandEvent($command, $input, $output);

$this->dispatcher->dispatch(ConsoleEvents::COMMAND, $event);

try {

$exitCode = $command->run($input, $output);

} catch (\Exception $e) {

$event = new ConsoleTerminateEvent($command, $input, $output, $e->getCode());

$this->dispatcher->dispatch(ConsoleEvents::TERMINATE, $event);

$event = new ConsoleExceptionEvent($command, $input, $output, $e, $event->getExitCode());

$this->dispatcher->dispatch(ConsoleEvents::EXCEPTION, $event);

throw $event->getException();

}

$event = new ConsoleTerminateEvent($command, $input, $output, $exitCode);

$this->dispatcher->dispatch(ConsoleEvents::TERMINATE, $event);

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 $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 DialogHelper(),

new ProgressHelper(),

new TableHelper(),

new QuestionHelper(),

));

}

/**

* Runs and parses stty -a if it's available, suppressing any error output.

*

* @return string

*/

private function getSttyColumns()

{

if (!function_exists('proc_open')) {

return;

}

$descriptorspec = array(1 => array('pipe', 'w'), 2 => array('pipe', 'w'));

$process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));

if (is_resource($process)) {

$info = stream_get_contents($pipes[1]);

fclose($pipes[1]);

fclose($pipes[2]);

proc_close($process);

return $info;

}

}

/**

* Runs and parses mode CON if it's available, suppressing any error output.

*

* @return string <width>x<height> or null if it could not be parsed

*/

private function getConsoleMode()

{