Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/class-loader/ClassMapGenerator.php

@@ -0,0 +1,158 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+if (!defined('SYMFONY_TRAIT')) {
+    if (PHP_VERSION_ID >= 50400) {
+        define('SYMFONY_TRAIT', T_TRAIT);
+    } else {
+        define('SYMFONY_TRAIT', 0);
+    }
+}
+
+/**
+ * ClassMapGenerator.
+ *
+ * @author Gyula Sallai <salla016@gmail.com>
+ */
+class ClassMapGenerator
+{
+    /**
+     * Generate a class map file.
+     *
+     * @param array|string $dirs Directories or a single path to search in
+     * @param string       $file The name of the class map file
+     */
+    public static function dump($dirs, $file)
+    {
+        $dirs = (array) $dirs;
+        $maps = array();
+
+        foreach ($dirs as $dir) {
+            $maps = array_merge($maps, static::createMap($dir));
+        }
+
+        file_put_contents($file, sprintf('<?php return %s;', var_export($maps, true)));
+    }
+
+    /**
+     * Iterate over all files in the given directory searching for classes.
+     *
+     * @param \Iterator|string $dir The directory to search in or an iterator
+     *
+     * @return array A class map array
+     */
+    public static function createMap($dir)
+    {
+        if (is_string($dir)) {
+            $dir = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($dir));
+        }
+
+        $map = array();
+
+        foreach ($dir as $file) {
+            if (!$file->isFile()) {
+                continue;
+            }
+
+            $path = $file->getRealPath();
+
+            if (pathinfo($path, PATHINFO_EXTENSION) !== 'php') {
+                continue;
+            }
+
+            $classes = self::findClasses($path);
+
+            foreach ($classes as $class) {
+                $map[$class] = $path;
+            }
+        }
+
+        return $map;
+    }
+
+    /**
+     * Extract the classes in the given file.
+     *
+     * @param string $path The file to check
+     *
+     * @return array The found classes
+     */
+    private static function findClasses($path)
+    {
+        $contents = file_get_contents($path);
+        $tokens = token_get_all($contents);
+
+        $classes = array();
+
+        $namespace = '';
+        for ($i = 0, $max = count($tokens); $i < $max; ++$i) {
+            $token = $tokens[$i];
+
+            if (is_string($token)) {
+                continue;
+            }
+
+            $class = '';
+
+            switch ($token[0]) {
+                case T_NAMESPACE:
+                    $namespace = '';
+                    // If there is a namespace, extract it
+                    while (($t = $tokens[++$i]) && is_array($t)) {
+                        if (in_array($t[0], array(T_STRING, T_NS_SEPARATOR))) {
+                            $namespace .= $t[1];
+                        }
+                    }
+                    $namespace .= '\\';
+                    break;
+                case T_CLASS:
+                case T_INTERFACE:
+                case SYMFONY_TRAIT:
+                    // Skip usage of ::class constant
+                    $isClassConstant = false;
+                    for ($j = $i - 1; $j > 0; --$j) {
+                        if (is_string($tokens[$j])) {
+                            break;
+                        }
+
+                        if (T_DOUBLE_COLON === $tokens[$j][0]) {
+                            $isClassConstant = true;
+                            break;
+                        } elseif (!in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
+                            break;
+                        }
+                    }
+
+                    if ($isClassConstant) {
+                        continue;
+                    }
+
+                    // Find the classname
+                    while (($t = $tokens[++$i]) && is_array($t)) {
+                        if (T_STRING === $t[0]) {
+                            $class .= $t[1];
+                        } elseif ($class !== '' && T_WHITESPACE == $t[0]) {
+                            break;
+                        }
+                    }
+
+                    $classes[] = ltrim($namespace.$class, '\\');
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return $classes;
+    }
+}