141 lines
3.6 KiB
PHP
141 lines
3.6 KiB
PHP
<?php
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/*
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* This file is part of Psy Shell.
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*
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* (c) 2012-2023 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Psy\ExecutionLoop;
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use PhpParser\Parser;
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use Psy\Exception\ParseErrorException;
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use Psy\ParserFactory;
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use Psy\Shell;
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/**
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* A runkit-based code reloader, which is pretty much magic.
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*
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* @todo Remove RunkitReloader once we drop support for PHP 7.x :(
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*/
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class RunkitReloader extends AbstractListener
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{
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private Parser $parser;
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private array $timestamps = [];
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/**
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* Only enabled if Runkit is installed.
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*/
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public static function isSupported(): bool
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{
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// runkit_import was removed in runkit7-4.0.0a1
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return \extension_loaded('runkit') || \extension_loaded('runkit7') && \function_exists('runkit_import');
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}
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/**
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* Construct a Runkit Reloader.
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*/
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public function __construct()
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{
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$this->parser = (new ParserFactory())->createParser();
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}
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/**
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* Reload code on input.
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*
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* @param Shell $shell
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* @param string $input
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*/
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public function onInput(Shell $shell, string $input)
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{
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$this->reload($shell);
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}
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/**
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* Look through included files and update anything with a new timestamp.
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*
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* @param Shell $shell
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*/
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private function reload(Shell $shell)
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{
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\clearstatcache();
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$modified = [];
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foreach (\get_included_files() as $file) {
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$timestamp = \filemtime($file);
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if (!isset($this->timestamps[$file])) {
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$this->timestamps[$file] = $timestamp;
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continue;
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}
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if ($this->timestamps[$file] === $timestamp) {
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continue;
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}
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if (!$this->lintFile($file)) {
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$msg = \sprintf('Modified file "%s" could not be reloaded', $file);
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$shell->writeException(new ParseErrorException($msg));
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continue;
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}
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$modified[] = $file;
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$this->timestamps[$file] = $timestamp;
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}
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// switch (count($modified)) {
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// case 0:
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// return;
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// case 1:
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// printf("Reloading modified file: \"%s\"\n", str_replace(getcwd(), '.', $file));
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// break;
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// default:
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// printf("Reloading %d modified files\n", count($modified));
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// break;
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// }
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foreach ($modified as $file) {
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$flags = (
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RUNKIT_IMPORT_FUNCTIONS |
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RUNKIT_IMPORT_CLASSES |
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RUNKIT_IMPORT_CLASS_METHODS |
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RUNKIT_IMPORT_CLASS_CONSTS |
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RUNKIT_IMPORT_CLASS_PROPS |
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RUNKIT_IMPORT_OVERRIDE
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);
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// these two const cannot be used with RUNKIT_IMPORT_OVERRIDE in runkit7
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if (\extension_loaded('runkit7')) {
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$flags &= ~RUNKIT_IMPORT_CLASS_PROPS & ~RUNKIT_IMPORT_CLASS_STATIC_PROPS;
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runkit7_import($file, $flags);
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} else {
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runkit_import($file, $flags);
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}
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}
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}
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/**
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* Should this file be re-imported?
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*
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* Use PHP-Parser to ensure that the file is valid PHP.
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*
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* @param string $file
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*/
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private function lintFile(string $file): bool
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{
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// first try to parse it
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try {
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$this->parser->parse(\file_get_contents($file));
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} catch (\Throwable $e) {
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return false;
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}
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return true;
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}
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}
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