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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2015 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\Output\ShellOutput;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Show the current stack trace.
*/
class TraceCommand extends Command
{
/**
* {@inheritdoc}
*/
protected function configure()
{
$this
->setName('trace')
->setDefinition(array(
new InputOption('include-psy', 'p', InputOption::VALUE_NONE, 'Include Psy in the call stack.'),
new InputOption('num', 'n', InputOption::VALUE_REQUIRED, 'Only include NUM lines.'),
))
->setDescription('Show the current call stack.')
->setHelp(
<<<'HELP'
Show the current call stack.
Optionally, include PsySH in the call stack by passing the <info>--include-psy</info> option.
e.g.
<return>> trace -n10</return>
<return>> trace --include-psy</return>
HELP
);
}
/**
* {@inheritdoc}
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
$trace = $this->getBacktrace(new \Exception(), $input->getOption('num'), $input->getOption('include-psy'));
$output->page($trace, ShellOutput::NUMBER_LINES);
}
/**
* Get a backtrace for an exception.
*
* Optionally limit the number of rows to include with $count, and exclude
* Psy from the trace.
*
* @param \Exception $e The exception with a backtrace.
* @param int $count (default: PHP_INT_MAX)
* @param bool $includePsy (default: true)
*
* @return array Formatted stacktrace lines.
*/
protected function getBacktrace(\Exception $e, $count = null, $includePsy = true)
{
if ($cwd = getcwd()) {
$cwd = rtrim($cwd, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
}
if ($count === null) {
$count = PHP_INT_MAX;
}
$lines = array();
$trace = $e->getTrace();
array_unshift($trace, array(
'function' => '',
'file' => $e->getFile() !== null ? $e->getFile() : 'n/a',
'line' => $e->getLine() !== null ? $e->getLine() : 'n/a',
'args' => array(),
));
if (!$includePsy) {
for ($i = count($trace) - 1; $i >= 0; $i--) {
$thing = isset($trace[$i]['class']) ? $trace[$i]['class'] : $trace[$i]['function'];
if (preg_match('/\\\\?Psy\\\\/', $thing)) {
$trace = array_slice($trace, $i + 1);
break;
}
}
}
for ($i = 0, $count = min($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']) ? $this->replaceCwd($cwd, $trace[$i]['file']) : 'n/a';
$line = isset($trace[$i]['line']) ? $trace[$i]['line'] : 'n/a';
$lines[] = sprintf(
' <class>%s</class>%s%s() at <info>%s:%s</info>',
OutputFormatter::escape($class),
OutputFormatter::escape($type),
OutputFormatter::escape($function),
OutputFormatter::escape($file),
OutputFormatter::escape($line)
);
}
return $lines;
}
/**
* Replace the given directory from the start of a filepath.
*
* @param string $cwd
* @param string $file
*
* @return string
*/
private function replaceCwd($cwd, $file)
{
if ($cwd === false) {
return $file;
} else {
return preg_replace('/^' . preg_quote($cwd, '/') . '/', '', $file);
}
}
}