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vendor/symfony/config/Loader/FileLoader.php

@@ -0,0 +1,172 @@
+<?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\Config\Loader;
+
+use Symfony\Component\Config\Exception\FileLoaderImportCircularReferenceException;
+use Symfony\Component\Config\Exception\FileLoaderLoadException;
+use Symfony\Component\Config\Exception\FileLocatorFileNotFoundException;
+use Symfony\Component\Config\FileLocatorInterface;
+use Symfony\Component\Config\Resource\FileExistenceResource;
+use Symfony\Component\Config\Resource\GlobResource;
+
+/**
+ * FileLoader is the abstract class used by all built-in loaders that are file based.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class FileLoader extends Loader
+{
+    protected static $loading = array();
+
+    protected $locator;
+
+    private $currentDir;
+
+    public function __construct(FileLocatorInterface $locator)
+    {
+        $this->locator = $locator;
+    }
+
+    /**
+     * Sets the current directory.
+     *
+     * @param string $dir
+     */
+    public function setCurrentDir($dir)
+    {
+        $this->currentDir = $dir;
+    }
+
+    /**
+     * Returns the file locator used by this loader.
+     *
+     * @return FileLocatorInterface
+     */
+    public function getLocator()
+    {
+        return $this->locator;
+    }
+
+    /**
+     * Imports a resource.
+     *
+     * @param mixed       $resource       A Resource
+     * @param string|null $type           The resource type or null if unknown
+     * @param bool        $ignoreErrors   Whether to ignore import errors or not
+     * @param string|null $sourceResource The original resource importing the new resource
+     *
+     * @return mixed
+     *
+     * @throws FileLoaderLoadException
+     * @throws FileLoaderImportCircularReferenceException
+     * @throws FileLocatorFileNotFoundException
+     */
+    public function import($resource, $type = null, $ignoreErrors = false, $sourceResource = null)
+    {
+        if (\is_string($resource) && \strlen($resource) !== $i = strcspn($resource, '*?{[')) {
+            $ret = array();
+            $isSubpath = 0 !== $i && false !== strpos(substr($resource, 0, $i), '/');
+            foreach ($this->glob($resource, false, $_, $ignoreErrors || !$isSubpath) as $path => $info) {
+                if (null !== $res = $this->doImport($path, $type, $ignoreErrors, $sourceResource)) {
+                    $ret[] = $res;
+                }
+                $isSubpath = true;
+            }
+
+            if ($isSubpath) {
+                return isset($ret[1]) ? $ret : (isset($ret[0]) ? $ret[0] : null);
+            }
+        }
+
+        return $this->doImport($resource, $type, $ignoreErrors, $sourceResource);
+    }
+
+    /**
+     * @internal
+     */
+    protected function glob($pattern, $recursive, &$resource = null, $ignoreErrors = false)
+    {
+        if (\strlen($pattern) === $i = strcspn($pattern, '*?{[')) {
+            $prefix = $pattern;
+            $pattern = '';
+        } elseif (0 === $i || false === strpos(substr($pattern, 0, $i), '/')) {
+            $prefix = '.';
+            $pattern = '/'.$pattern;
+        } else {
+            $prefix = \dirname(substr($pattern, 0, 1 + $i));
+            $pattern = substr($pattern, \strlen($prefix));
+        }
+
+        try {
+            $prefix = $this->locator->locate($prefix, $this->currentDir, true);
+        } catch (FileLocatorFileNotFoundException $e) {
+            if (!$ignoreErrors) {
+                throw $e;
+            }
+
+            $resource = array();
+            foreach ($e->getPaths() as $path) {
+                $resource[] = new FileExistenceResource($path);
+            }
+
+            return;
+        }
+        $resource = new GlobResource($prefix, $pattern, $recursive);
+
+        foreach ($resource as $path => $info) {
+            yield $path => $info;
+        }
+    }
+
+    private function doImport($resource, $type = null, $ignoreErrors = false, $sourceResource = null)
+    {
+        try {
+            $loader = $this->resolve($resource, $type);
+
+            if ($loader instanceof self && null !== $this->currentDir) {
+                $resource = $loader->getLocator()->locate($resource, $this->currentDir, false);
+            }
+
+            $resources = \is_array($resource) ? $resource : array($resource);
+            for ($i = 0; $i < $resourcesCount = \count($resources); ++$i) {
+                if (isset(self::$loading[$resources[$i]])) {
+                    if ($i == $resourcesCount - 1) {
+                        throw new FileLoaderImportCircularReferenceException(array_keys(self::$loading));
+                    }
+                } else {
+                    $resource = $resources[$i];
+                    break;
+                }
+            }
+            self::$loading[$resource] = true;
+
+            try {
+                $ret = $loader->load($resource, $type);
+            } finally {
+                unset(self::$loading[$resource]);
+            }
+
+            return $ret;
+        } catch (FileLoaderImportCircularReferenceException $e) {
+            throw $e;
+        } catch (\Exception $e) {
+            if (!$ignoreErrors) {
+                // prevent embedded imports from nesting multiple exceptions
+                if ($e instanceof FileLoaderLoadException) {
+                    throw $e;
+                }
+
+                throw new FileLoaderLoadException($resource, $sourceResource, null, $e, $type);
+            }
+        }
+    }
+}