comparison vendor/symfony/console/Application.php @ 14:1fec387a4317

Update Drupal core to 8.5.2 via Composer

  * 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\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\ConsoleExceptionEvent;
 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.

     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
      */

     {
         $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;
     }
 
+    public function setCommandLoader(CommandLoaderInterface $commandLoader)
+    {
+        $this->commandLoader = $commandLoader;
+    }
+
     /**
      * 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()}.
      */

 
         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 || !$x instanceof \Exception) {
-                throw $x;
-            }
-
+        $renderException = function ($e) use ($output) {
+            if (!$e instanceof \Exception) {
+                $e = class_exists(FatalThrowableError::class) ? new FatalThrowableError($e) : new \ErrorException($e->getMessage(), $e->getCode(), E_ERROR, $e->getFile(), $e->getLine());
+            }
             if ($output instanceof ConsoleOutputInterface) {
                 $this->renderException($e, $output->getErrorOutput());
             } else {
                 $this->renderException($e, $output);
             }
+        };
+        if ($phpHandler = set_exception_handler($renderException)) {
+            restore_exception_handler();
+            if (!is_array($phpHandler) || !$phpHandler[0] instanceof ErrorHandler) {
+                $debugHandler = true;
+            } elseif ($debugHandler = $phpHandler[0]->setExceptionHandler($renderException)) {
+                $phpHandler[0]->setExceptionHandler($debugHandler);
+            }
+        }
+
+        if (null !== $this->dispatcher && $this->dispatcher->hasListeners(ConsoleEvents::EXCEPTION)) {
+            @trigger_error(sprintf('The "ConsoleEvents::EXCEPTION" event is deprecated since Symfony 3.3 and will be removed in 4.0. Listen to the "ConsoleEvents::ERROR" event instead.'), E_USER_DEPRECATED);
+        }
+
+        $this->configureIO($input, $output);
+
+        try {
+            $exitCode = $this->doRun($input, $output);
+        } catch (\Exception $e) {
+            if (!$this->catchExceptions) {
+                throw $e;
+            }
+
+            $renderException($e);
 
             $exitCode = $e->getCode();
             if (is_numeric($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 = $phpHandler[0]->setExceptionHandler(null);
+                if ($finalHandler !== $renderException) {
+                    $phpHandler[0]->setExceptionHandler($finalHandler);
+                }
+            }
         }
 
         if ($this->autoExit) {
             if ($exitCode > 255) {
                 $exitCode = 255;

         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 (!$name) {
             $name = $this->defaultCommand;
-            $this->definition->setArguments(array_merge(
-                $this->definition->getArguments(),
+            $definition = $this->getDefinition();
+            $definition->setArguments(array_merge(
+                $definition->getArguments(),
                 array(
-                    'command' => new InputArgument('command', InputArgument::OPTIONAL, $this->definition->getArgument('command')->getDescription(), $name),
+                    'command' => new InputArgument('command', InputArgument::OPTIONAL, $definition->getArgument('command')->getDescription(), $name),
                 )
             ));
         }
 
-        $this->runningCommand = null;
-        // the command name MUST be the first element of the input
-        $command = $this->find($name);
+        try {
+            $e = $this->runningCommand = null;
+            // the command name MUST be the first element of the input
+            $command = $this->find($name);
+        } catch (\Exception $e) {
+        } catch (\Throwable $e) {
+        }
+        if (null !== $e) {
+            if (null !== $this->dispatcher) {
+                $event = new ConsoleErrorEvent($input, $output, $e);
+                $this->dispatcher->dispatch(ConsoleEvents::ERROR, $event);
+                $e = $event->getError();
+
+                if (0 === $event->getExitCode()) {
+                    return 0;
+                }
+            }
+
+            throw $e;
+        }
 
         $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;
     }
 

      *
      * @return HelperSet The HelperSet instance associated with this command
      */
     public function getHelperSet()
     {
+        if (!$this->helperSet) {
+            $this->helperSet = $this->getDefaultHelperSet();
+        }
+
         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;
     }
 

      *
      * @return InputDefinition The InputDefinition instance
      */
     public function getDefinition()
     {
+        if (!$this->definition) {
+            $this->definition = $this->getDefaultInputDefinition();
+        }
+
         if ($this->singleCommand) {
             $inputDefinition = $this->definition;
             $inputDefinition->setArguments();
 
             return $inputDefinition;

      * 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)
     {
+        $this->init();
+
         $command->setApplication($this);
 
         if (!$command->isEnabled()) {
             $command->setApplication(null);
 

 
         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)));
         }
 
+        if (!$command->getName()) {
+            throw new LogicException(sprintf('The command defined in "%s" cannot have an empty name.', get_class($command)));
+        }
+
         $this->commands[$command->getName()] = $command;
 
         foreach ($command->getAliases() as $alias) {
             $this->commands[$alias] = $command;
         }

      *
      * @throws CommandNotFoundException When given command name does not exist
      */
     public function get($name)
     {
-        if (!isset($this->commands[$name])) {
+        $this->init();
+
+        if (!$this->has($name)) {
             throw new CommandNotFoundException(sprintf('The command "%s" does not exist.', $name));
         }
 
         $command = $this->commands[$name];
 

      *
      * @return bool true if the command exists, false otherwise
      */
     public function has($name)
     {
-        return isset($this->commands[$name]);
+        $this->init();
+
+        return isset($this->commands[$name]) || ($this->commandLoader && $this->commandLoader->has($name) && $this->add($this->commandLoader->get($name)));
     }
 
     /**
      * Returns an array of all unique namespaces used by currently registered commands.
      *

             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));
+            throw new CommandNotFoundException(sprintf("The namespace \"%s\" is ambiguous.\nDid you mean one of these?\n%s", $namespace, $this->getAbbreviationSuggestions(array_values($namespaces))), array_values($namespaces));
         }
 
         return $exact ? $namespace : reset($namespaces);
     }
 

      *
      * @throws CommandNotFoundException When command name is incorrect or ambiguous
      */
     public function find($name)
     {
-        $allCommands = array_keys($this->commands);
+        $this->init();
+
+        $aliases = array();
+        $allCommands = $this->commandLoader ? array_merge($this->commandLoader->getNames(), array_keys($this->commands)) : array_keys($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.'$}', $commands)) < 1) {
+        if (empty($commands)) {
+            $commands = preg_grep('{^'.$expr.'}i', $allCommands);
+        }
+
+        // if no commands matched or we just matched namespaces
+        if (empty($commands) || count(preg_grep('{^'.$expr.'$}i', $commands)) < 1) {
             if (false !== $pos = strrpos($name, ':')) {
                 // check if a namespace exists and contains commands
                 $this->findNamespace(substr($name, 0, $pos));
             }
 

             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();
+            $commandList = $this->commandLoader ? array_merge(array_flip($this->commandLoader->getNames()), $this->commands) : $this->commands;
+            $commands = array_unique(array_filter($commands, function ($nameOrAlias) use ($commandList, $commands, &$aliases) {
+                $commandName = $commandList[$nameOrAlias] instanceof Command ? $commandList[$nameOrAlias]->getName() : $nameOrAlias;
+                $aliases[$nameOrAlias] = $commandName;
 
                 return $commandName === $nameOrAlias || !in_array($commandName, $commands);
-            });
-        }
-
-        $exact = in_array($name, $commands, true);
+            }));
+        }
+
+        $exact = in_array($name, $commands, true) || isset($aliases[$name]);
         if (count($commands) > 1 && !$exact) {
-            $suggestions = $this->getAbbreviationSuggestions(array_values($commands));
-
-            throw new CommandNotFoundException(sprintf('Command "%s" is ambiguous (%s).', $name, $suggestions), array_values($commands));
+            $usableWidth = $this->terminal->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, $maxLen, ' ').' '.$commandList[$cmd]->getDescription();
+
+                return Helper::strlen($abbrev) > $usableWidth ? Helper::substr($abbrev, 0, $usableWidth - 3).'...' : $abbrev;
+            }, array_values($commands));
+            $suggestions = $this->getAbbreviationSuggestions($abbrevs);
+
+            throw new CommandNotFoundException(sprintf("Command \"%s\" is ambiguous.\nDid you mean one of these?\n%s", $name, $suggestions), array_values($commands));
         }
 
         return $this->get($exact ? $name : reset($commands));
     }
 

      *
      * @return Command[] An array of Command instances
      */
     public function all($namespace = null)
     {
+        $this->init();
+
         if (null === $namespace) {
-            return $this->commands;
+            if (!$this->commandLoader) {
+                return $this->commands;
+            }
+
+            $commands = $this->commands;
+            foreach ($this->commandLoader->getNames() as $name) {
+                if (!isset($commands[$name]) && $this->has($name)) {
+                    $commands[$name] = $this->get($name);
+                }
+            }
+
+            return $commands;
         }
 
         $commands = array();
         foreach ($this->commands as $name => $command) {
             if ($namespace === $this->extractNamespace($name, substr_count($namespace, ':') + 1)) {
                 $commands[$name] = $command;
+            }
+        }
+
+        if ($this->commandLoader) {
+            foreach ($this->commandLoader->getNames() as $name) {
+                if (!isset($commands[$name]) && $namespace === $this->extractNamespace($name, substr_count($namespace, ':') + 1) && $this->has($name)) {
+                    $commands[$name] = $this->get($name);
+                }
             }
         }
 
         return $commands;
     }

         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);
 
+        $this->doRenderException($e, $output);
+
+        if (null !== $this->runningCommand) {
+            $output->writeln(sprintf('<info>%s</info>', sprintf($this->runningCommand->getSynopsis(), $this->getName())), OutputInterface::VERBOSITY_QUIET);
+            $output->writeln('', OutputInterface::VERBOSITY_QUIET);
+        }
+    }
+
+    protected function doRenderException(\Exception $e, OutputInterface $output)
+    {
         do {
-            $title = sprintf(
-                '  [%s%s]  ',
-                get_class($e),
-                $output->isVerbose() && 0 !== ($code = $e->getCode()) ? ' ('.$code.')' : ''
-            );
-
-            $len = Helper::strlen($title);
+            $message = trim($e->getMessage());
+            if ('' === $message || OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
+                $title = sprintf('  [%s%s]  ', get_class($e), 0 !== ($code = $e->getCode()) ? ' ('.$code.')' : '');
+                $len = Helper::strlen($title);
+            } else {
+                $len = 0;
+            }
 
             $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 ('' !== $message ? preg_split('/\r?\n/', $message) : array() as $line) {
                 foreach ($this->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 <= $output->getVerbosity()) {
+                $messages[] = sprintf('<comment>%s</comment>', OutputFormatter::escape(sprintf('In %s line %s:', basename($e->getFile()) ?: 'n/a', $e->getLine() ?: 'n/a')));
+            }
             $messages[] = $emptyLine = sprintf('<error>%s</error>', str_repeat(' ', $len));
-            $messages[] = sprintf('<error>%s%s</error>', $title, str_repeat(' ', max(0, $len - Helper::strlen($title))));
+            if ('' === $message || OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
+                $messages[] = sprintf('<error>%s%s</error>', $title, str_repeat(' ', max(0, $len - Helper::strlen($title))));
+            }
             foreach ($lines as $line) {
                 $messages[] = sprintf('<error>  %s  %s</error>', OutputFormatter::escape($line[0]), str_repeat(' ', $len - $line[1]));
             }
             $messages[] = $emptyLine;
             $messages[] = '';

             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'];

                 }
 
                 $output->writeln('', OutputInterface::VERBOSITY_QUIET);
             }
         } while ($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 $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);

             if (!@posix_isatty($inputStream) && false === getenv('SHELL_INTERACTIVE')) {
                 $input->setInteractive(false);
             }
         }
 
+        switch ($shellVerbosity = (int) getenv('SHELL_VERBOSITY')) {
+            case -1: $output->setVerbosity(OutputInterface::VERBOSITY_QUIET); break;
+            case 1: $output->setVerbosity(OutputInterface::VERBOSITY_VERBOSE); break;
+            case 2: $output->setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE); break;
+            case 3: $output->setVerbosity(OutputInterface::VERBOSITY_DEBUG); break;
+            default: $shellVerbosity = 0; break;
+        }
+
         if (true === $input->hasParameterOption(array('--quiet', '-q'), true)) {
             $output->setVerbosity(OutputInterface::VERBOSITY_QUIET);
-            $input->setInteractive(false);
+            $shellVerbosity = -1;
         } else {
-            if ($input->hasParameterOption('-vvv', true) || $input->hasParameterOption('--verbose=3', true) || $input->getParameterOption('--verbose', false, true) === 3) {
+            if ($input->hasParameterOption('-vvv', true) || $input->hasParameterOption('--verbose=3', true) || 3 === $input->getParameterOption('--verbose', false, true)) {
                 $output->setVerbosity(OutputInterface::VERBOSITY_DEBUG);
-            } elseif ($input->hasParameterOption('-vv', true) || $input->hasParameterOption('--verbose=2', true) || $input->getParameterOption('--verbose', false, true) === 2) {
+                $shellVerbosity = 3;
+            } elseif ($input->hasParameterOption('-vv', true) || $input->hasParameterOption('--verbose=2', true) || 2 === $input->getParameterOption('--verbose', false, true)) {
                 $output->setVerbosity(OutputInterface::VERBOSITY_VERY_VERBOSE);
+                $shellVerbosity = 2;
             } elseif ($input->hasParameterOption('-v', true) || $input->hasParameterOption('--verbose=1', true) || $input->hasParameterOption('--verbose', true) || $input->getParameterOption('--verbose', false, true)) {
                 $output->setVerbosity(OutputInterface::VERBOSITY_VERBOSE);
-            }
-        }
+                $shellVerbosity = 1;
+            }
+        }
+
+        if (-1 === $shellVerbosity) {
+            $input->setInteractive(false);
+        }
+
+        putenv('SHELL_VERBOSITY='.$shellVerbosity);
+        $_ENV['SHELL_VERBOSITY'] = $shellVerbosity;
+        $_SERVER['SHELL_VERBOSITY'] = $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.
-     *
-     * @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)
     {

             }
         } 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 = $e->getCode();
+            if ($this->dispatcher->hasListeners(ConsoleEvents::EXCEPTION)) {
+                $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();
+                }
+            }
+            $event = new ConsoleErrorEvent($input, $output, $e, $command);
+            $this->dispatcher->dispatch(ConsoleEvents::ERROR, $event);
+            $e = $event->getError();
+
+            if (0 === $exitCode = $event->getExitCode()) {
+                $e = null;
+            }
         }
 
         $event = new ConsoleTerminateEvent($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 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) : '');
+        return '    '.implode("\n    ", $abbrevs);
     }
 
     /**
      * Returns the namespace part of the command name.
      *

 
     /**
      * 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
+     * @param string   $name       The string
+     * @param iterable $collection The collection
      *
      * @return string[] A sorted array of similar string
      */
     private function findAlternatives($name, $collection)
     {

                 $alternatives[$item] = isset($alternatives[$item]) ? $alternatives[$item] - $lev : $lev;
             }
         }
 
         $alternatives = array_filter($alternatives, function ($lev) use ($threshold) { return $lev < 2 * $threshold; });
-        asort($alternatives);
+        ksort($alternatives, SORT_NATURAL | SORT_FLAG_CASE);
 
         return array_keys($alternatives);
     }
 
     /**

             }
             // 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;
-        }
+
+        $lines[] = count($lines) ? str_pad($line, $width) : $line;
 
         mb_convert_variables($encoding, 'utf8', $lines);
 
         return $lines;
     }

             }
         }
 
         return $namespaces;
     }
+
+    private function init()
+    {
+        if ($this->initialized) {
+            return;
+        }
+        $this->initialized = true;
+
+        foreach ($this->getDefaultCommands() as $command) {
+            $this->add($command);
+        }
+    }
 }