<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2025 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\Input\FilterOptions;
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
{
protected Context $context;
/**
* ContextAware interface.
*
* @param Context $context
*/
public function setContext(Context $context)
{
$this->context = $context;
}
/**
* {@inheritdoc}
*/
protected function configure()
{
list($grep, $insensitive, $invert) = FilterOptions::getOptions();
$this
->setName('wtf')
->setAliases(['last-exception', 'wtf?'])
->setDefinition([
new InputArgument('incredulity', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, 'Number of lines to show.'),
new InputOption('all', 'a', InputOption::VALUE_NONE, 'Show entire backtrace.'),
$grep,
$insensitive,
$invert,
])
->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 -a/--all flag:
e.g.
<return>>>> wtf -a</return>
HELP
);
}
/**
* {@inheritdoc}
*
* @return int 0 if everything went fine, or an exit code
*/
protected function execute(InputInterface $input, OutputInterface $output): int
{
$this->filter->bind($input);
$incredulity = \implode('', $input->getArgument('incredulity'));
if (\strlen(\preg_replace('/[\\?!]/', '', $incredulity))) {
throw new \InvalidArgumentException('Incredulity must include only "?" and "!"');
}
$exception = $this->context->getLastException();
$count = $input->getOption('all') ? \PHP_INT_MAX : \max(3, \pow(2, \strlen($incredulity) + 1));
if ($output instanceof ShellOutput) {
$output->startPaging();
}
do {
$traceCount = \count($exception->getTrace());
$showLines = $count;
// Show the whole trace if we'd only be hiding a few lines
if ($traceCount < \max($count * 1.2, $count + 2)) {
$showLines = \PHP_INT_MAX;
}
$trace = $this->getBacktrace($exception, $showLines);
$moreLines = $traceCount - \count($trace);
$output->writeln($this->getShell()->formatException($exception));
$output->writeln('--');
$output->write($trace, true, ShellOutput::NUMBER_LINES);
$output->writeln('');
if ($moreLines > 0) {
$output->writeln(\sprintf(
'<aside>Use <return>wtf -a</return> to see %d more lines</aside>',
$moreLines
));
$output->writeln('');
}
} while ($exception = $exception->getPrevious());
if ($output instanceof ShellOutput) {
$output->stopPaging();
}
return 0;
}
}
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