comparison vendor/psy/psysh/src/ExecutionLoop/RunkitReloader.php @ 13:5fb285c0d0e3

Update Drupal core to 8.4.7 via Composer. Security update; I *think* we've
been lucky to get away with this so far, as we don't support self-registration
which seems to be used by the so-called "drupalgeddon 2" attack that 8.4.5
was vulnerable to.

+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 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()
+    {
+        return extension_loaded('runkit');
+    }
+
+    /**
+     * 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, $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 $file) {
+            runkit_import($file, (
+                RUNKIT_IMPORT_FUNCTIONS |
+                RUNKIT_IMPORT_CLASSES |
+                RUNKIT_IMPORT_CLASS_METHODS |
+                RUNKIT_IMPORT_CLASS_CONSTS |
+                RUNKIT_IMPORT_CLASS_PROPS |
+                RUNKIT_IMPORT_OVERRIDE
+            ));
+        }
+    }
+
+    /**
+     * Should this file be re-imported?
+     *
+     * Use PHP-Parser to ensure that the file is valid PHP.
+     *
+     * @param string $file
+     *
+     * @return bool
+     */
+    private function lintFile($file)
+    {
+        // first try to parse it
+        try {
+            $this->parser->parse(file_get_contents($file));
+        } catch (\Exception $e) {
+            return false;
+        }
+
+        return true;
+    }
+}