--- /dev/null
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Command;
+
+use Psy\Context;
+use Psy\ContextAware;
+use Psy\Output\ShellOutput;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Show the last uncaught exception.
+ */
+class WtfCommand extends TraceCommand implements ContextAware
+{
+ /**
+ * Context instance (for ContextAware interface).
+ *
+ * @var Context
+ */
+ protected $context;
+
+ /**
+ * ContextAware interface.
+ *
+ * @param Context $context
+ */
+ public function setContext(Context $context)
+ {
+ $this->context = $context;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function configure()
+ {
+ $this
+ ->setName('wtf')
+ ->setAliases(array('last-exception', 'wtf?'))
+ ->setDefinition(array(
+ new InputArgument('incredulity', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, 'Number of lines to show'),
+ new InputOption('verbose', 'v', InputOption::VALUE_NONE, 'Show entire backtrace.'),
+ ))
+ ->setDescription('Show the backtrace of the most recent exception.')
+ ->setHelp(
+ <<<'HELP'
+Shows a few lines of the backtrace of the most recent exception.
+
+If you want to see more lines, add more question marks or exclamation marks:
+
+e.g.
+<return>>>> wtf ?</return>
+<return>>>> wtf ?!???!?!?</return>
+
+To see the entire backtrace, pass the -v/--verbose flag:
+
+e.g.
+<return>>>> wtf -v</return>
+HELP
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ *
+ * --verbose is not hidden for this option :)
+ *
+ * @return array
+ */
+ protected function getHiddenOptions()
+ {
+ $options = parent::getHiddenOptions();
+ unset($options[array_search('verbose', $options)]);
+
+ return $options;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function execute(InputInterface $input, OutputInterface $output)
+ {
+ $incredulity = implode('', $input->getArgument('incredulity'));
+ if (strlen(preg_replace('/[\\?!]/', '', $incredulity))) {
+ throw new \InvalidArgumentException('Incredulity must include only "?" and "!".');
+ }
+
+ $exception = $this->context->getLastException();
+ $count = $input->getOption('verbose') ? PHP_INT_MAX : pow(2, max(0, (strlen($incredulity) - 1)));
+ $trace = $this->getBacktrace($exception, $count);
+
+ $shell = $this->getApplication();
+ $output->page(function ($output) use ($exception, $trace, $shell) {
+ $shell->renderException($exception, $output);
+ $output->writeln('--');
+ $output->write($trace, true, ShellOutput::NUMBER_LINES);
+ });
+ }
+}