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[yaffs-website] / vendor / psy / psysh / src / CodeCleaner / RequirePass.php

diff --git a/vendor/psy/psysh/src/CodeCleaner/RequirePass.php b/vendor/psy/psysh/src/CodeCleaner/RequirePass.php
new file mode 100644 (file)
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+++ b/vendor/psy/psysh/src/CodeCleaner/RequirePass.php
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+<?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\CodeCleaner;
+
+use PhpParser\Node;
+use PhpParser\Node\Arg;
+use PhpParser\Node\Expr\Include_;
+use PhpParser\Node\Expr\StaticCall;
+use PhpParser\Node\Name\FullyQualified as FullyQualifiedName;
+use PhpParser\Node\Scalar\LNumber;
+use Psy\Exception\ErrorException;
+use Psy\Exception\FatalErrorException;
+use Psy\Shell;
+
+/**
+ * Add runtime validation for `require` and `require_once` calls.
+ */
+class RequirePass extends CodeCleanerPass
+{
+    private static $requireTypes = [Include_::TYPE_REQUIRE, Include_::TYPE_REQUIRE_ONCE];
+
+    /**
+     * {@inheritdoc}
+     */
+    public function enterNode(Node $origNode)
+    {
+        if (!$this->isRequireNode($origNode)) {
+            return;
+        }
+
+        $node = clone $origNode;
+
+        /*
+         * rewrite
+         *
+         *   $foo = require $bar
+         *
+         * to
+         *
+         *   $foo = require \Psy\CodeCleaner\RequirePass::resolve($bar)
+         */
+        $node->expr = new StaticCall(
+            new FullyQualifiedName('Psy\CodeCleaner\RequirePass'),
+            'resolve',
+            [new Arg($origNode->expr), new Arg(new LNumber($origNode->getLine()))],
+            $origNode->getAttributes()
+        );
+
+        return $node;
+    }
+
+    /**
+     * Runtime validation that $file can be resolved as an include path.
+     *
+     * If $file can be resolved, return $file. Otherwise throw a fatal error exception.
+     *
+     * @throws FatalErrorException when unable to resolve include path for $file
+     * @throws ErrorException      if $file is empty and E_WARNING is included in error_reporting level
+     *
+     * @param string $file
+     * @param int    $lineNumber Line number of the original require expression
+     *
+     * @return string Exactly the same as $file
+     */
+    public static function resolve($file, $lineNumber = null)
+    {
+        $file = (string) $file;
+
+        if ($file === '') {
+            // @todo Shell::handleError would be better here, because we could
+            // fake the file and line number, but we can't call it statically.
+            // So we're duplicating some of the logics here.
+            if (E_WARNING & error_reporting()) {
+                ErrorException::throwException(E_WARNING, 'Filename cannot be empty', null, $lineNumber);
+            } else {
+                // @todo trigger an error as fallback? this is pretty ugly…
+                // trigger_error('Filename cannot be empty', E_USER_WARNING);
+            }
+        }
+
+        if ($file === '' || !stream_resolve_include_path($file)) {
+            $msg = sprintf("Failed opening required '%s'", $file);
+            throw new FatalErrorException($msg, 0, E_ERROR, null, $lineNumber);
+        }
+
+        return $file;
+    }
+
+    private function isRequireNode(Node $node)
+    {
+        return $node instanceof Include_ && in_array($node->type, self::$requireTypes);
+    }
+}