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diff --git a/vendor/symfony/console/Input/StringInput.php b/vendor/symfony/console/Input/StringInput.php
new file mode 100644
index 000000000..a40ddba31
--- /dev/null
+++ b/vendor/symfony/console/Input/StringInput.php
@@ -0,0 +1,85 @@
+<?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\Console\Input;
+
+use Symfony\Component\Console\Exception\InvalidArgumentException;
+
+/**
+ * StringInput represents an input provided as a string.
+ *
+ * Usage:
+ *
+ *     $input = new StringInput('foo --bar="foobar"');
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class StringInput extends ArgvInput
+{
+    const REGEX_STRING = '([^\s]+?)(?:\s|(?<!\\\\)"|(?<!\\\\)\'|$)';
+    const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\')';
+
+    /**
+     * Constructor.
+     *
+     * @param string          $input      An array of parameters from the CLI (in the argv format)
+     * @param InputDefinition $definition A InputDefinition instance
+     *
+     * @deprecated The second argument is deprecated as it does not work (will be removed in 3.0), use 'bind' method instead
+     */
+    public function __construct($input, InputDefinition $definition = null)
+    {
+        if ($definition) {
+            @trigger_error('The $definition argument of the '.__METHOD__.' method is deprecated and will be removed in 3.0. Set this parameter with the bind() method instead.', E_USER_DEPRECATED);
+        }
+
+        parent::__construct(array(), null);
+
+        $this->setTokens($this->tokenize($input));
+
+        if (null !== $definition) {
+            $this->bind($definition);
+        }
+    }
+
+    /**
+     * Tokenizes a string.
+     *
+     * @param string $input The input to tokenize
+     *
+     * @return array An array of tokens
+     *
+     * @throws InvalidArgumentException When unable to parse input (should never happen)
+     */
+    private function tokenize($input)
+    {
+        $tokens = array();
+        $length = strlen($input);
+        $cursor = 0;
+        while ($cursor < $length) {
+            if (preg_match('/\s+/A', $input, $match, null, $cursor)) {
+            } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, null, $cursor)) {
+                $tokens[] = $match[1].$match[2].stripcslashes(str_replace(array('"\'', '\'"', '\'\'', '""'), '', substr($match[3], 1, strlen($match[3]) - 2)));
+            } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, null, $cursor)) {
+                $tokens[] = stripcslashes(substr($match[0], 1, strlen($match[0]) - 2));
+            } elseif (preg_match('/'.self::REGEX_STRING.'/A', $input, $match, null, $cursor)) {
+                $tokens[] = stripcslashes($match[1]);
+            } else {
+                // should never happen
+                throw new InvalidArgumentException(sprintf('Unable to parse input near "... %s ..."', substr($input, $cursor, 10)));
+            }
+
+            $cursor += strlen($match[0]);
+        }
+
+        return $tokens;
+    }
+}