MAGETWO-31485: Move Config Components to a Separate Module

 - create Config module
 - move related classes and configuration from Backend and Core to Config
 - update module dependency graph accordingly

Author: Dale Sikkema

app/code/Magento/AdminNotification/Model/System/Message/Baseurl.php

@@ -67,7 +67,7 @@ protected function _getConfigUrl()
         ) {
             $output = $this->_urlBuilder->getUrl('adminhtml/system_config/edit', ['section' => 'web']);
         } else {
-            /** @var $dataCollection \Magento\Core\Model\Resource\Config\Data\Collection */
+            /** @var $dataCollection \Magento\Config\Model\Resource\Config\Data\Collection */
             $dataCollection = $this->_configValueFactory->create()->getCollection();
             $dataCollection->addValueFilter(\Magento\Store\Model\Store::BASE_URL_PLACEHOLDER);
 

app/code/Magento/AdminNotification/etc/adminhtml/system.xml

@@ -5,22 +5,22 @@
  * See COPYING.txt for license details.
  */
 -->
-<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../Backend/etc/system_file.xsd">
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../Config/etc/system_file.xsd">
     <system>
         <section id="system">
             <group id="adminnotification" translate="label" type="text" sortOrder="250" showInDefault="1" showInWebsite="0" showInStore="0">
                 <label>Notifications</label>
                 <field id="use_https" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
                     <label>Use HTTPS to Get Feed</label>
-                    <source_model>Magento\Backend\Model\Config\Source\Yesno</source_model>
+                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                 </field>
                 <field id="frequency" translate="label" type="select" sortOrder="2" showInDefault="1" showInWebsite="0" showInStore="0">
                     <label>Update Frequency</label>
                     <source_model>Magento\AdminNotification\Model\Config\Source\Frequency</source_model>
                 </field>
                 <field id="last_update" translate="label" type="label" sortOrder="3" showInDefault="1" showInWebsite="0" showInStore="0">
                     <label>Last Update</label>
-                    <frontend_model>Magento\Backend\Block\System\Config\Form\Field\Notification</frontend_model>
+                    <frontend_model>Magento\Config\Block\System\Config\Form\Field\Notification</frontend_model>
                 </field>
             </group>
         </section>

app/code/Magento/Backend/App/UserConfig.php

@@ -7,7 +7,7 @@
  */
 namespace Magento\Backend\App;
 
-use Magento\Backend\Model\Config\Factory;
+use Magento\Config\Model\Config\Factory;
 use Magento\Framework\App\Bootstrap;
 use Magento\Framework\App\Console\Response;
 use Magento\Framework\AppInterface;

app/code/Magento/Backend/Block/Page/System/Config/Robots/Reset.php

@@ -13,7 +13,7 @@
  *
  * @author     Magento Core Team <core@magentocommerce.com>
  */
-class Reset extends \Magento\Backend\Block\System\Config\Form\Field
+class Reset extends \Magento\Config\Block\System\Config\Form\Field
 {
     /**
      * Pasge robots default instructions
@@ -39,7 +39,7 @@ public function __construct(
     protected function _construct()
     {
         parent::_construct();
-        $this->setTemplate('page/system/config/robots/reset.phtml');
+        $this->setTemplate('Magento_Config::page/system/config/robots/reset.phtml');
     }
 
     /**

app/code/Magento/Backend/Block/Widget/Form/Element/Dependence.php

@@ -40,7 +40,7 @@ class Dependence extends \Magento\Backend\Block\AbstractBlock
     protected $_configOptions = [];
 
     /**
-     * @var \Magento\Backend\Model\Config\Structure\Element\Dependency\FieldFactory
+     * @var \Magento\Config\Model\Config\Structure\Element\Dependency\FieldFactory
      */
     protected $_fieldFactory;
 
@@ -52,13 +52,13 @@ class Dependence extends \Magento\Backend\Block\AbstractBlock
     /**
      * @param \Magento\Backend\Block\Context $context
      * @param \Magento\Framework\Json\EncoderInterface $jsonEncoder
-     * @param \Magento\Backend\Model\Config\Structure\Element\Dependency\FieldFactory $fieldFactory
+     * @param \Magento\Config\Model\Config\Structure\Element\Dependency\FieldFactory $fieldFactory
      * @param array $data
      */
     public function __construct(
         \Magento\Backend\Block\Context $context,
         \Magento\Framework\Json\EncoderInterface $jsonEncoder,
-        \Magento\Backend\Model\Config\Structure\Element\Dependency\FieldFactory $fieldFactory,
+        \Magento\Config\Model\Config\Structure\Element\Dependency\FieldFactory $fieldFactory,
         array $data = []
     ) {
         $this->_jsonEncoder = $jsonEncoder;
@@ -84,13 +84,13 @@ public function addFieldMap($fieldId, $fieldName)
      *
      * @param string $fieldName
      * @param string $fieldNameFrom
-     * @param \Magento\Backend\Model\Config\Structure\Element\Dependency\Field|string $refField
+     * @param \Magento\Config\Model\Config\Structure\Element\Dependency\Field|string $refField
      * @return \Magento\Backend\Block\Widget\Form\Element\Dependence
      */
     public function addFieldDependence($fieldName, $fieldNameFrom, $refField)
     {
         if (!is_object($refField)) {
-            /** @var $refField \Magento\Backend\Model\Config\Structure\Element\Dependency\Field */
+            /** @var $refField \Magento\Config\Model\Config\Structure\Element\Dependency\Field */
             $refField = $this->_fieldFactory->create(
                 ['fieldData' => ['value' => (string)$refField], 'fieldPrefix' => '']
             );
@@ -139,7 +139,7 @@ protected function _getDependsJson()
         $result = [];
         foreach ($this->_depends as $to => $row) {
             foreach ($row as $from => $field) {
-                /** @var $field \Magento\Backend\Model\Config\Structure\Element\Dependency\Field */
+                /** @var $field \Magento\Config\Model\Config\Structure\Element\Dependency\Field */
                 $result[$this->_fields[$to]][$this->_fields[$from]] = [
                     'values' => $field->getValues(),
                     'negative' => $field->isNegative(),

app/code/Magento/Backend/Model/Config/Structure/Element/Iterator/Group.php

@@ -28,7 +28,7 @@ public function __construct(\Magento\Framework\ObjectManagerInterface $objectMan
      *
      * @param string $commandName
      * @param array $data
-     * @return \Magento\Backend\Model\Config
+     * @return \Magento\Config\Model\Config
      */
     public function create($commandName, array $data = [])
     {

app/code/Magento/Backend/Model/Config/Structure/Element/Iterator/Section.php

@@ -1,4 +1,3 @@
 The Backend module contains common infrastructure and assets for other modules to be defined and used in their
 administration user interface (UI). It does not contain anything specific to other modules. Among many things it
-handles the logic of authenticating and authorizing users, configuring locale, layout, search, session, translation and
-several other configurations for admin user.
+handles the logic of authenticating and authorizing users.