Chris@13: <?php
Chris@13: 
Chris@13: /*
Chris@13:  * This file is part of Psy Shell.
Chris@13:  *
Chris@13:  * (c) 2012-2018 Justin Hileman
Chris@13:  *
Chris@13:  * For the full copyright and license information, please view the LICENSE
Chris@13:  * file that was distributed with this source code.
Chris@13:  */
Chris@13: 
Chris@13: namespace Psy\Command;
Chris@13: 
Chris@13: use Psy\Context;
Chris@13: use Psy\ContextAware;
Chris@13: use Psy\Input\FilterOptions;
Chris@13: use Psy\Output\ShellOutput;
Chris@13: use Symfony\Component\Console\Input\InputArgument;
Chris@13: use Symfony\Component\Console\Input\InputInterface;
Chris@13: use Symfony\Component\Console\Input\InputOption;
Chris@13: use Symfony\Component\Console\Output\OutputInterface;
Chris@13: 
Chris@13: /**
Chris@13:  * Show the last uncaught exception.
Chris@13:  */
Chris@13: class WtfCommand extends TraceCommand implements ContextAware
Chris@13: {
Chris@13:     /**
Chris@13:      * Context instance (for ContextAware interface).
Chris@13:      *
Chris@13:      * @var Context
Chris@13:      */
Chris@13:     protected $context;
Chris@13: 
Chris@13:     /**
Chris@13:      * ContextAware interface.
Chris@13:      *
Chris@13:      * @param Context $context
Chris@13:      */
Chris@13:     public function setContext(Context $context)
Chris@13:     {
Chris@13:         $this->context = $context;
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     protected function configure()
Chris@13:     {
Chris@13:         list($grep, $insensitive, $invert) = FilterOptions::getOptions();
Chris@13: 
Chris@13:         $this
Chris@13:             ->setName('wtf')
Chris@13:             ->setAliases(['last-exception', 'wtf?'])
Chris@13:             ->setDefinition([
Chris@13:                 new InputArgument('incredulity', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, 'Number of lines to show.'),
Chris@13:                 new InputOption('all', 'a',  InputOption::VALUE_NONE, 'Show entire backtrace.'),
Chris@13: 
Chris@13:                 $grep,
Chris@13:                 $insensitive,
Chris@13:                 $invert,
Chris@13:             ])
Chris@13:             ->setDescription('Show the backtrace of the most recent exception.')
Chris@13:             ->setHelp(
Chris@13:                 <<<'HELP'
Chris@13: Shows a few lines of the backtrace of the most recent exception.
Chris@13: 
Chris@13: If you want to see more lines, add more question marks or exclamation marks:
Chris@13: 
Chris@13: e.g.
Chris@13: <return>>>> wtf ?</return>
Chris@13: <return>>>> wtf ?!???!?!?</return>
Chris@13: 
Chris@13: To see the entire backtrace, pass the -a/--all flag:
Chris@13: 
Chris@13: e.g.
Chris@13: <return>>>> wtf -a</return>
Chris@13: HELP
Chris@13:             );
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     protected function execute(InputInterface $input, OutputInterface $output)
Chris@13:     {
Chris@13:         $this->filter->bind($input);
Chris@13: 
Chris@17:         $incredulity = \implode('', $input->getArgument('incredulity'));
Chris@17:         if (\strlen(\preg_replace('/[\\?!]/', '', $incredulity))) {
Chris@13:             throw new \InvalidArgumentException('Incredulity must include only "?" and "!"');
Chris@13:         }
Chris@13: 
Chris@13:         $exception = $this->context->getLastException();
Chris@17:         $count     = $input->getOption('all') ? PHP_INT_MAX : \max(3, \pow(2, \strlen($incredulity) + 1));
Chris@13: 
Chris@13:         $shell = $this->getApplication();
Chris@13:         $output->startPaging();
Chris@13:         do {
Chris@17:             $traceCount = \count($exception->getTrace());
Chris@13:             $showLines  = $count;
Chris@13:             // Show the whole trace if we'd only be hiding a few lines
Chris@17:             if ($traceCount < \max($count * 1.2, $count + 2)) {
Chris@13:                 $showLines = PHP_INT_MAX;
Chris@13:             }
Chris@13: 
Chris@13:             $trace     = $this->getBacktrace($exception, $showLines);
Chris@17:             $moreLines = $traceCount - \count($trace);
Chris@13: 
Chris@13:             $output->writeln($shell->formatException($exception));
Chris@13:             $output->writeln('--');
Chris@13:             $output->write($trace, true, ShellOutput::NUMBER_LINES);
Chris@13:             $output->writeln('');
Chris@13: 
Chris@13:             if ($moreLines > 0) {
Chris@17:                 $output->writeln(\sprintf(
Chris@13:                     '<aside>Use <return>wtf -a</return> to see %d more lines</aside>',
Chris@13:                     $moreLines
Chris@13:                 ));
Chris@13:                 $output->writeln('');
Chris@13:             }
Chris@13:         } while ($exception = $exception->getPrevious());
Chris@13:         $output->stopPaging();
Chris@13:     }
Chris@13: }