Viewing file:  RunkitReloader.php (3.65 KB) -rw-r--r--
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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2022 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 Psy\Exception\ParseErrorException;
use Psy\ParserFactory;
use Psy\Shell;
/**
* A runkit-based code reloader, which is pretty much magic.
*/
class RunkitReloader extends AbstractListener
{
private $parser;
private $timestamps = [];
/**
* Only enabled if Runkit is installed.
*
* @return bool
*/
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.
*
* @todo Pass in Parser Factory instance for dependency injection?
*/
public function __construct()
{
$parserFactory = new ParserFactory();
$this->parser = $parserFactory->createParser();
}
/**
* Reload code on input.
*
* @param Shell $shell
* @param string $input
*/
public function onInput(Shell $shell, string $input)
{
$this->reload($shell);
}
/**
* Look through included files and update anything with a new timestamp.
*
* @param Shell $shell
*/
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] = $timestamp;
}
// switch (count($modified)) {
// case 0:
// return;
// case 1:
// printf("Reloading modified file: \"%s\"\n", str_replace(getcwd(), '.', $file));
// break;
// default:
// printf("Reloading %d modified files\n", count($modified));
// break;
// }
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);
}
}
}
/**
* Should this file be re-imported?
*
* Use PHP-Parser to ensure that the file is valid PHP.
*
* @param string $file
*
* @return bool
*/
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;
}
}
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