MAGETWO-69535: Error during importing new list of scopes through shared file

Author: shiftedreality

app/code/Magento/Store/App/Config/InitialConfigSource.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Store\App\Config;
+
+use Magento\Framework\App\Config\ConfigSourceInterface;
+use Magento\Framework\App\DeploymentConfig;
+use Magento\Framework\App\DeploymentConfig\Reader;
+use Magento\Framework\DataObject;
+
+class InitialConfigSource implements ConfigSourceInterface
+{
+    /**
+     * @var Reader
+     */
+    private $reader;
+
+    /**
+     * @var DeploymentConfig
+     */
+    private $deploymentConfig;
+
+    /**
+     * @var string
+     */
+    private $configType;
+
+    /**
+     * DataProvider constructor.
+     *
+     * @param Reader $reader
+     * @param DeploymentConfig $deploymentConfig
+     * @param string $configType
+     */
+    public function __construct(Reader $reader, DeploymentConfig $deploymentConfig, $configType)
+    {
+        $this->reader = $reader;
+        $this->deploymentConfig = $deploymentConfig;
+        $this->configType = $configType;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function get($path = '')
+    {
+        /**
+         * Magento store configuration should not be read from file source
+         * on installed instance.
+         *
+         * @see \Magento\Store\Model\Config\Importer To import store configs
+         */
+        if ($this->deploymentConfig->isAvailable()) {
+            return [];
+        }
+
+        $data = new DataObject($this->reader->load());
+        if ($path !== '' && $path !== null) {
+            $path = '/' . $path;
+        }
+
+        return $data->getData($this->configType . $path) ?: [];
+    }
+}