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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2026 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\ExecutionLoop;
use PhpParser\Parser;
use Psy\ConfigPaths;
use Psy\Exception\ParseErrorException;
use Psy\OutputAware;
use Psy\ParserFactory;
use Psy\Shell;
use Psy\Util\Docblock;
use Symfony\Component\Console\Output\OutputInterface;
/**
* A runkit-based code reloader, which is pretty much magic.
*
* @todo Remove RunkitReloader once we drop support for PHP 7.x :(
*/
class RunkitReloader extends AbstractListener implements OutputAware
{
private Parser $parser;
private ?OutputInterface $output = null;
private array $timestamps = [];
/**
* Only enabled if Runkit is installed.
*/
public static function isSupported(): bool
{
// runkit_import was removed in runkit7-4.0.0a1
return \extension_loaded('runkit') || \extension_loaded('runkit7') && \function_exists('runkit_import');
}
/**
* Construct a Runkit Reloader.
*/
public function __construct()
{
$this->parser = (new ParserFactory())->createParser();
}
/**
* {@inheritdoc}
*/
public function setOutput(OutputInterface $output): void
{
$this->output = $output;
}
/**
* Reload code on input.
*/
public function onInput(Shell $shell, string $input)
{
$this->reload($shell);
return null;
}
/**
* Look through included files and update anything with a new timestamp.
*/
private function reload(Shell $shell)
{
\clearstatcache();
$modified = [];
foreach (\get_included_files() as $file) {
$timestamp = \filemtime($file);
if (!isset($this->timestamps[$file])) {
$this->timestamps[$file] = $timestamp;
continue;
}
if ($this->timestamps[$file] === $timestamp) {
continue;
}
if (!$this->lintFile($file)) {
$msg = \sprintf('Modified file "%s" could not be reloaded', $file);
$shell->writeException(new ParseErrorException($msg));
continue;
}
$modified[] = $file;
$this->timestamps[$file] = $timestamp;
}
if (\count($modified) === 0) {
return;
}
// Clear magic method/property cache since docblocks may have changed
Docblock::clearMagicCache();
// Notify user about reload attempts
if ($this->output) {
if (\count($modified) === 1) {
$this->output->writeln(\sprintf('<whisper>Reloading %s</whisper>', ConfigPaths::prettyPath($modified[0])));
} else {
$this->output->writeln(\sprintf('<whisper>Reloading %d files</whisper>', \count($modified)));
}
}
foreach ($modified as $file) {
$flags = (
RUNKIT_IMPORT_FUNCTIONS |
RUNKIT_IMPORT_CLASSES |
RUNKIT_IMPORT_CLASS_METHODS |
RUNKIT_IMPORT_CLASS_CONSTS |
RUNKIT_IMPORT_CLASS_PROPS |
RUNKIT_IMPORT_OVERRIDE
);
// these two const cannot be used with RUNKIT_IMPORT_OVERRIDE in runkit7
if (\extension_loaded('runkit7')) {
$flags &= ~RUNKIT_IMPORT_CLASS_PROPS & ~RUNKIT_IMPORT_CLASS_STATIC_PROPS;
runkit7_import($file, $flags);
} else {
runkit_import($file, $flags);
}
}
}
/**
* Check if file has valid PHP syntax.
*/
private function lintFile(string $file): bool
{
// first try to parse it
try {
$this->parser->parse(\file_get_contents($file));
} catch (\Throwable $e) {
return false;
}
return true;
}
}