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Directory >> /var/www/html/back/vendor/psy/psysh/src/ExecutionLoop/

File / Folder	Size	Action
.	-
AbstractListener.php	0.995KB	edt ren
ExecutionLoggingListene...	0.887KB	edt ren
InputLoggingListener.php	0.867KB	edt ren
Listener.php	1.872KB	edt ren
ProcessForker.php	13.969KB	edt ren
RunkitReloader.php	3.797KB	edt ren
SignalHandler.php	3.725KB	edt ren
UopzReloader.php	8.67KB	edt ren
UopzReloaderVisitor.php	21.401KB	edt ren

<?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\ExecutionLoop;

use PhpParser\NodeTraverser;
use PhpParser\Parser;
use PhpParser\PrettyPrinter;
use Psy\ConfigPaths;
use Psy\Exception\ParseErrorException;
use Psy\OutputAware;
use Psy\ParserFactory;
use Psy\Shell;
use Psy\Util\DependencyChecker;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * A uopz-based code reloader for modern PHP.
 *
 * This reloader uses the uopz extension to dynamically reload modified files
 * without restarting the REPL session. It parses changed files and uses uopz
 * functions to override methods, functions, and constants.
 *
 * Reload flow:
 *   1. On each input, check included files for timestamp changes
 *   2. Parse modified files and reload safe elements (methods, unconditional functions)
 *   3. Skip unsafe elements (conditional functions/constants) and track in skippedFiles
 *   4. When `yolo` command enables force-reload, re-process skipped files with
 *      safety checks bypassed
 *
 * Known limitations:
 *  - Cannot add/remove class properties
 *  - Cannot change class inheritance or interfaces
 *  - Cannot change method signatures (parameter types/counts)
 *
 * However, it can:
 *  - Reload method implementations (including private/protected)
 *  - Reload function implementations
 *  - Reload class and global constants
 *  - Add new methods and functions
 */
class UopzReloader extends AbstractListener implements OutputAware
{
    private Parser $parser;
    private PrettyPrinter\Standard $printer;
    private ?OutputInterface $output = null;
    private ?Shell $shell = null;

/** @var array<string, int> File path => last processed timestamp */
    private array $timestamps = [];

/**
     * File paths with skipped elements, awaiting force-reload via yolo.
     *
     * @var array<string, int> File path => last processed timestamp
     */
    private array $skippedFiles = [];

/** @var bool Whether to bypass safety warnings (set by yolo command) */
    private bool $forceReload = false;

/**
     * Only enabled if uopz extension is installed with required functions.
     *
     * Requires uopz 5.0+ which provides uopz_set_return() and uopz_redefine().
     */
    public static function isSupported(): bool
    {
        return \extension_loaded('uopz') && DependencyChecker::functionsAvailable([
            'uopz_set_return',
            'uopz_redefine',
            'uopz_unset_return',
            'uopz_undefine',
        ]);
    }

/**
     * Construct a Uopz Reloader.
     */
    public function __construct()
    {
        $this->parser = (new ParserFactory())->createParser();
        $this->printer = new PrettyPrinter\Standard();
    }

/**
     * {@inheritdoc}
     */
    public function setOutput(OutputInterface $output): void
    {
        $this->output = $output;
    }

/**
     * Enable or disable force-reload mode.
     *
     * When enabled, safety checks are bypassed and any pending skipped files
     * are immediately re-processed.
     */
    public function setForceReload(bool $force)
    {
        $this->forceReload = $force;

// Re-process any skipped files now that force-reload is enabled
        if ($force && !empty($this->skippedFiles) && $this->shell !== null) {
            $this->reloadSkippedFiles();
        }
    }

/**
     * Re-process files that were previously skipped.
     */
    private function reloadSkippedFiles(): void
    {
        $files = $this->skippedFiles;
        $this->skippedFiles = [];

if (\count($files) === 1) {
            $this->writeInfo(\sprintf('YOLO: Force-reloading %s', ConfigPaths::prettyPath(\array_key_first($files))));
        } else {
            $this->writeInfo(\sprintf('YOLO: Force-reloading %d files', \count($files)));
        }

foreach ($files as $file => $timestamp) {
            $this->reloadFile($file);
            $this->timestamps[$file] = $timestamp;
        }
    }

/**
     * Reload code on input.
     */
    public function onInput(Shell $shell, string $input)
    {
        $this->shell = $shell;
        $this->reload();

return null;
    }

/**
     * Look through included files and update anything with a new timestamp.
     */
    private function reload(): void
    {
        \clearstatcache();
        $modified = [];

foreach (\get_included_files() as $file) {
            // Skip files that no longer exist
            if (!\file_exists($file)) {
                continue;
            }

$timestamp = \filemtime($file);

if (!isset($this->timestamps[$file])) {
                $this->timestamps[$file] = $timestamp;
                continue;
            }

if ($this->timestamps[$file] === $timestamp) {
                continue;
            }

if (!$this->lintFile($file)) {
                $this->writeError(\sprintf('Modified file "%s" has syntax errors and cannot be reloaded', ConfigPaths::prettyPath($file)));
                continue;
            }

$modified[$file] = $timestamp;
        }

if (\count($modified) === 0) {
            return;
        }

// Notify user about reload attempts
        if ($this->forceReload) {
            if (\count($modified) === 1) {
                $this->writeInfo(\sprintf('YOLO: Force-reloading %s', ConfigPaths::prettyPath(\array_key_first($modified))));
            } else {
                $this->writeInfo(\sprintf('YOLO: Force-reloading %d files', \count($modified)));
            }
        } else {
            if (\count($modified) === 1) {
                $this->writeInfo(\sprintf('Reloading %s', ConfigPaths::prettyPath(\array_key_first($modified))));
            } else {
                $this->writeInfo(\sprintf('Reloading %d files', \count($modified)));
            }
        }

foreach ($modified as $file => $timestamp) {
            $hadSkips = $this->reloadFile($file);
            $this->timestamps[$file] = $timestamp;
            if ($hadSkips) {
                // Track for later force-reload via yolo
                $this->skippedFiles[$file] = $timestamp;
            } else {
                unset($this->skippedFiles[$file]);
            }
        }
    }

/**
     * Reload a single file by parsing it and applying uopz overrides.
     *
     * @return bool True if any elements were skipped (need yolo to force)
     */
    private function reloadFile(string $file): bool
    {
        try {
            $code = \file_get_contents($file);
            $ast = $this->parser->parse($code);

if ($ast === null) {
                return false;
            }

$traverser = new NodeTraverser();
            $reloader = new UopzReloaderVisitor($this->printer, $this->forceReload);
            $traverser->addVisitor($reloader);
            $traverser->traverse($ast);

// Check if there were any warnings about limitations
            if ($reloader->hasWarnings()) {
                foreach ($reloader->getWarnings() as $warning) {
                    $this->writeWarning($warning);
                }
            }

return $reloader->hasSkips();
        } catch (\Throwable $e) {
            $this->writeError(\sprintf('Failed to reload %s: %s', ConfigPaths::prettyPath($file), $e->getMessage()));

return false;
        }
    }

/**
     * Write an info message.
     */
    private function writeInfo(string $message): void
    {
        if ($this->output) {
            $this->output->writeln(\sprintf('<whisper>%s</whisper>', $message));
        }
    }

/**
     * Write a warning message.
     */
    private function writeWarning(string $message): void
    {
        if ($this->output) {
            $this->output->writeln(\sprintf('<comment>Warning: %s</comment>', $message));
        }
    }

/**
     * Write an error message using shell exception handling.
     */
    private function writeError(string $message): void
    {
        if ($this->shell) {
            try {
                $this->shell->writeException(new ParseErrorException($message));

return;
            } catch (\Throwable $e) {
                // Shell not fully initialized, fall back to output
            }
        }

if ($this->output) {
            $this->output->writeln(\sprintf('<error>Error: %s</error>', $message));
        }
    }

/**
     * Check if file has valid PHP syntax.
     */
    private function lintFile(string $file): bool
    {
        try {
            $this->parser->parse(\file_get_contents($file));
        } catch (\Throwable $e) {
            return false;
        }

return true;
    }
}

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