comparison vendor/symfony/class-loader/ClassCollectionLoader.php @ 0:4c8ae668cc8c

Initial import (non-working)

+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+/**
+ * ClassCollectionLoader.
+ *
+ * @author Fabien Potencier <[e-mail]>
+ */
+class ClassCollectionLoader
+{
+    private static $loaded;
+    private static $seen;
+    private static $useTokenizer = true;
+
+    /**
+     * Loads a list of classes and caches them in one big file.
+     *
+     * @param array  $classes    An array of classes to load
+     * @param string $cacheDir   A cache directory
+     * @param string $name       The cache name prefix
+     * @param bool   $autoReload Whether to flush the cache when the cache is stale or not
+     * @param bool   $adaptive   Whether to remove already declared classes or not
+     * @param string $extension  File extension of the resulting file
+     *
+     * @throws \InvalidArgumentException When class can't be loaded
+     */
+    public static function load($classes, $cacheDir, $name, $autoReload, $adaptive = false, $extension = '.php')
+    {
+        // each $name can only be loaded once per PHP process
+        if (isset(self::$loaded[$name])) {
+            return;
+        }
+
+        self::$loaded[$name] = true;
+
+        if ($adaptive) {
+            $declared = array_merge(get_declared_classes(), get_declared_interfaces(), get_declared_traits());
+
+            // don't include already declared classes
+            $classes = array_diff($classes, $declared);
+
+            // the cache is different depending on which classes are already declared
+            $name = $name.'-'.substr(hash('sha256', implode('|', $classes)), 0, 5);
+        }
+
+        $classes = array_unique($classes);
+
+        // cache the core classes
+        if (!is_dir($cacheDir) && !@mkdir($cacheDir, 0777, true) && !is_dir($cacheDir)) {
+            throw new \RuntimeException(sprintf('Class Collection Loader was not able to create directory "%s"', $cacheDir));
+        }
+        $cacheDir = rtrim(realpath($cacheDir) ?: $cacheDir, '/'.DIRECTORY_SEPARATOR);
+        $cache = $cacheDir.'/'.$name.$extension;
+
+        // auto-reload
+        $reload = false;
+        if ($autoReload) {
+            $metadata = $cache.'.meta';
+            if (!is_file($metadata) || !is_file($cache)) {
+                $reload = true;
+            } else {
+                $time = filemtime($cache);
+                $meta = unserialize(file_get_contents($metadata));
+
+                sort($meta[1]);
+                sort($classes);
+
+                if ($meta[1] != $classes) {
+                    $reload = true;
+                } else {
+                    foreach ($meta[0] as $resource) {
+                        if (!is_file($resource) || filemtime($resource) > $time) {
+                            $reload = true;
+
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (!$reload && file_exists($cache)) {
+            require_once $cache;
+
+            return;
+        }
+        if (!$adaptive) {
+            $declared = array_merge(get_declared_classes(), get_declared_interfaces(), get_declared_traits());
+        }
+
+        $files = self::inline($classes, $cache, $declared);
+
+        if ($autoReload) {
+            // save the resources
+            self::writeCacheFile($metadata, serialize(array(array_values($files), $classes)));
+        }
+    }
+
+    /**
+     * Generates a file where classes and their parents are inlined.
+     *
+     * @param array  $classes  An array of classes to load
+     * @param string $cache    The file where classes are inlined
+     * @param array  $excluded An array of classes that won't be inlined
+     *
+     * @return array The source map of inlined classes, with classes as keys and files as values
+     *
+     * @throws \RuntimeException When class can't be loaded
+     */
+    public static function inline($classes, $cache, array $excluded)
+    {
+        $declared = array();
+        foreach (self::getOrderedClasses($excluded) as $class) {
+            $declared[$class->getName()] = true;
+        }
+
+        // cache the core classes
+        $cacheDir = dirname($cache);
+        if (!is_dir($cacheDir) && !@mkdir($cacheDir, 0777, true) && !is_dir($cacheDir)) {
+            throw new \RuntimeException(sprintf('Class Collection Loader was not able to create directory "%s"', $cacheDir));
+        }
+
+        $spacesRegex = '(?:\s*+(?:(?:\#|//)[^\n]*+\n|/\*(?:(?<!\*/).)++)?+)*+';
+        $dontInlineRegex = <<<REGEX
+            '(?:
+               ^<\?php\s.declare.\(.strict_types.=.1.\).;
+               | \b__halt_compiler.\(.\)
+               | \b__(?:DIR|FILE)__\b
+            )'isx
+REGEX;
+        $dontInlineRegex = str_replace('.', $spacesRegex, $dontInlineRegex);
+
+        $cacheDir = explode('/', str_replace(DIRECTORY_SEPARATOR, '/', $cacheDir));
+        $files = array();
+        $content = '';
+        foreach (self::getOrderedClasses($classes) as $class) {
+            if (isset($declared[$class->getName()])) {
+                continue;
+            }
+            $declared[$class->getName()] = true;
+
+            $files[$class->getName()] = $file = $class->getFileName();
+            $c = file_get_contents($file);
+
+            if (preg_match($dontInlineRegex, $c)) {
+                $file = explode('/', str_replace(DIRECTORY_SEPARATOR, '/', $file));
+
+                for ($i = 0; isset($file[$i], $cacheDir[$i]); ++$i) {
+                    if ($file[$i] !== $cacheDir[$i]) {
+                        break;
+                    }
+                }
+                if (1 >= $i) {
+                    $file = var_export(implode('/', $file), true);
+                } else {
+                    $file = array_slice($file, $i);
+                    $file = str_repeat('../', count($cacheDir) - $i).implode('/', $file);
+                    $file = '__DIR__.'.var_export('/'.$file, true);
+                }
+
+                $c = "\nnamespace {require $file;}";
+            } else {
+                $c = preg_replace(array('/^\s*<\?php/', '/\?>\s*$/'), '', $c);
+
+                // fakes namespace declaration for global code
+                if (!$class->inNamespace()) {
+                    $c = "\nnamespace\n{\n".$c."\n}\n";
+                }
+
+                $c = self::fixNamespaceDeclarations('<?php '.$c);
+                $c = preg_replace('/^\s*<\?php/', '', $c);
+            }
+
+            $content .= $c;
+        }
+        self::writeCacheFile($cache, '<?php '.$content);
+
+        return $files;
+    }
+
+    /**
+     * Adds brackets around each namespace if it's not already the case.
+     *
+     * @param string $source Namespace string
+     *
+     * @return string Namespaces with brackets
+     */
+    public static function fixNamespaceDeclarations($source)
+    {
+        if (!function_exists('token_get_all') || !self::$useTokenizer) {
+            if (preg_match('/(^|\s)namespace(.*?)\s*;/', $source)) {
+                $source = preg_replace('/(^|\s)namespace(.*?)\s*;/', "$1namespace$2\n{", $source)."}\n";
+            }
+
+            return $source;
+        }
+
+        $rawChunk = '';
+        $output = '';
+        $inNamespace = false;
+        $tokens = token_get_all($source);
+
+        for ($i = 0; isset($tokens[$i]); ++$i) {
+            $token = $tokens[$i];
+            if (!isset($token[1]) || 'b"' === $token) {
+                $rawChunk .= $token;
+            } elseif (in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
+                // strip comments
+                continue;
+            } elseif (T_NAMESPACE === $token[0]) {
+                if ($inNamespace) {
+                    $rawChunk .= "}\n";
+                }
+                $rawChunk .= $token[1];
+
+                // namespace name and whitespaces
+                while (isset($tokens[++$i][1]) && in_array($tokens[$i][0], array(T_WHITESPACE, T_NS_SEPARATOR, T_STRING))) {
+                    $rawChunk .= $tokens[$i][1];
+                }
+                if ('{' === $tokens[$i]) {
+                    $inNamespace = false;
+                    --$i;
+                } else {
+                    $rawChunk = rtrim($rawChunk)."\n{";
+                    $inNamespace = true;
+                }
+            } elseif (T_START_HEREDOC === $token[0]) {
+                $output .= self::compressCode($rawChunk).$token[1];
+                do {
+                    $token = $tokens[++$i];
+                    $output .= isset($token[1]) && 'b"' !== $token ? $token[1] : $token;
+                } while ($token[0] !== T_END_HEREDOC);
+                $output .= "\n";
+                $rawChunk = '';
+            } elseif (T_CONSTANT_ENCAPSED_STRING === $token[0]) {
+                $output .= self::compressCode($rawChunk).$token[1];
+                $rawChunk = '';
+            } else {
+                $rawChunk .= $token[1];
+            }
+        }
+
+        if ($inNamespace) {
+            $rawChunk .= "}\n";
+        }
+
+        $output .= self::compressCode($rawChunk);
+
+        if (PHP_VERSION_ID >= 70000) {
+            // PHP 7 memory manager will not release after token_get_all(), see https://bugs.php.net/70098
+            unset($tokens, $rawChunk);
+            gc_mem_caches();
+        }
+
+        return $output;
+    }
+
+    /**
+     * This method is only useful for testing.
+     */
+    public static function enableTokenizer($bool)
+    {
+        self::$useTokenizer = (bool) $bool;
+    }
+
+    /**
+     * Strips leading & trailing ws, multiple EOL, multiple ws.
+     *
+     * @param string $code Original PHP code
+     *
+     * @return string compressed code
+     */
+    private static function compressCode($code)
+    {
+        return preg_replace(
+            array('/^\s+/m', '/\s+$/m', '/([\n\r]+ *[\n\r]+)+/', '/[ \t]+/'),
+            array('', '', "\n", ' '),
+            $code
+        );
+    }
+
+    /**
+     * Writes a cache file.
+     *
+     * @param string $file    Filename
+     * @param string $content Temporary file content
+     *
+     * @throws \RuntimeException when a cache file cannot be written
+     */
+    private static function writeCacheFile($file, $content)
+    {
+        $dir = dirname($file);
+        if (!is_writable($dir)) {
+            throw new \RuntimeException(sprintf('Cache directory "%s" is not writable.', $dir));
+        }
+
+        $tmpFile = tempnam($dir, basename($file));
+
+        if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
+            @chmod($file, 0666 & ~umask());
+
+            return;
+        }
+
+        throw new \RuntimeException(sprintf('Failed to write cache file "%s".', $file));
+    }
+
+    /**
+     * Gets an ordered array of passed classes including all their dependencies.
+     *
+     * @param array $classes
+     *
+     * @return \ReflectionClass[] An array of sorted \ReflectionClass instances (dependencies added if needed)
+     *
+     * @throws \InvalidArgumentException When a class can't be loaded
+     */
+    private static function getOrderedClasses(array $classes)
+    {
+        $map = array();
+        self::$seen = array();
+        foreach ($classes as $class) {
+            try {
+                $reflectionClass = new \ReflectionClass($class);
+            } catch (\ReflectionException $e) {
+                throw new \InvalidArgumentException(sprintf('Unable to load class "%s"', $class));
+            }
+
+            $map = array_merge($map, self::getClassHierarchy($reflectionClass));
+        }
+
+        return $map;
+    }
+
+    private static function getClassHierarchy(\ReflectionClass $class)
+    {
+        if (isset(self::$seen[$class->getName()])) {
+            return array();
+        }
+
+        self::$seen[$class->getName()] = true;
+
+        $classes = array($class);
+        $parent = $class;
+        while (($parent = $parent->getParentClass()) && $parent->isUserDefined() && !isset(self::$seen[$parent->getName()])) {
+            self::$seen[$parent->getName()] = true;
+
+            array_unshift($classes, $parent);
+        }
+
+        $traits = array();
+
+        foreach ($classes as $c) {
+            foreach (self::resolveDependencies(self::computeTraitDeps($c), $c) as $trait) {
+                if ($trait !== $c) {
+                    $traits[] = $trait;
+                }
+            }
+        }
+
+        return array_merge(self::getInterfaces($class), $traits, $classes);
+    }
+
+    private static function getInterfaces(\ReflectionClass $class)
+    {
+        $classes = array();
+
+        foreach ($class->getInterfaces() as $interface) {
+            $classes = array_merge($classes, self::getInterfaces($interface));
+        }
+
+        if ($class->isUserDefined() && $class->isInterface() && !isset(self::$seen[$class->getName()])) {
+            self::$seen[$class->getName()] = true;
+
+            $classes[] = $class;
+        }
+
+        return $classes;
+    }
+
+    private static function computeTraitDeps(\ReflectionClass $class)
+    {
+        $traits = $class->getTraits();
+        $deps = array($class->getName() => $traits);
+        while ($trait = array_pop($traits)) {
+            if ($trait->isUserDefined() && !isset(self::$seen[$trait->getName()])) {
+                self::$seen[$trait->getName()] = true;
+                $traitDeps = $trait->getTraits();
+                $deps[$trait->getName()] = $traitDeps;
+                $traits = array_merge($traits, $traitDeps);
+            }
+        }
+
+        return $deps;
+    }
+
+    /**
+     * Dependencies resolution.
+     *
+     * This function does not check for circular dependencies as it should never
+     * occur with PHP traits.
+     *
+     * @param array            $tree       The dependency tree
+     * @param \ReflectionClass $node       The node
+     * @param \ArrayObject     $resolved   An array of already resolved dependencies
+     * @param \ArrayObject     $unresolved An array of dependencies to be resolved
+     *
+     * @return \ArrayObject The dependencies for the given node
+     *
+     * @throws \RuntimeException if a circular dependency is detected
+     */
+    private static function resolveDependencies(array $tree, $node, \ArrayObject $resolved = null, \ArrayObject $unresolved = null)
+    {
+        if (null === $resolved) {
+            $resolved = new \ArrayObject();
+        }
+        if (null === $unresolved) {
+            $unresolved = new \ArrayObject();
+        }
+        $nodeName = $node->getName();
+
+        if (isset($tree[$nodeName])) {
+            $unresolved[$nodeName] = $node;
+            foreach ($tree[$nodeName] as $dependency) {
+                if (!$resolved->offsetExists($dependency->getName())) {
+                    self::resolveDependencies($tree, $dependency, $resolved, $unresolved);
+                }
+            }
+            $resolved[$nodeName] = $node;
+            unset($unresolved[$nodeName]);
+        }
+
+        return $resolved;
+    }
+}