[console] Validate table 'sessions' exists. Fix #3572 (#3598)

* [console] Validate table 'key_value' exists. Fix #3572

* [console] Relocate validation to shouldRedirectToDrupalCore method.

* [console] Fix typo.

* [console] Validate using only sesssions table as Drupal does.

* [console] Apply PSR-2 code style.

src/Bootstrap/Drupal.php

@@ -7,7 +7,7 @@
 use Symfony\Component\Console\Output\ConsoleOutput;
 use Symfony\Component\HttpFoundation\Request;
 use Drupal\Component\FileCache\FileCacheFactory;
-use Drupal\Core\Site\Settings;
+use Drupal\Core\Database\Database;
 use Drupal\Console\Core\Style\DrupalStyle;
 use Drupal\Console\Core\Utils\ArgvInputReader;
 use Drupal\Console\Core\Bootstrap\DrupalConsoleCore;
@@ -35,6 +35,11 @@ public function __construct($autoload, DrupalFinder $drupalFinder)
         $this->drupalFinder = $drupalFinder;
     }
 
+    /**
+     * Boot the Drupal object
+     *
+     * @return \Symfony\Component\DependencyInjection\ContainerBuilder
+     */
     public function boot()
     {
         $output = new ConsoleOutput();
@@ -54,11 +59,8 @@ public function boot()
 
         if (!class_exists('Drupal\Core\DrupalKernel')) {
             $io->error('Class Drupal\Core\DrupalKernel does not exist.');
-            $drupal = new DrupalConsoleCore(
-                $this->drupalFinder->getComposerRoot(),
-                $this->drupalFinder->getDrupalRoot()
-            );
-            return $drupal->boot();
+
+            return $this->bootDrupalConsoleCore();
         }
 
         try {
@@ -161,6 +163,13 @@ public function boot()
 
             $container = $drupalKernel->getContainer();
 
+            if ($this->shouldRedirectToDrupalCore($container)) {
+                $container = $this->bootDrupalConsoleCore();
+                $container->set('class_loader', $this->autoload);
+
+                return $container;
+            }
+
             $container->set(
                 'console.root',
                 $this->drupalFinder->getComposerRoot()
@@ -187,11 +196,7 @@ public function boot()
 
             return $container;
         } catch (\Exception $e) {
-            $drupal = new DrupalConsoleCore(
-                $this->drupalFinder->getComposerRoot(),
-                $this->drupalFinder->getDrupalRoot()
-            );
-            $container = $drupal->boot();
+            $container = $this->bootDrupalConsoleCore();
             $container->set('class_loader', $this->autoload);
 
             $notifyErrorCodes = [
@@ -213,4 +218,39 @@ public function boot()
             return $container;
         }
     }
+
+    /**
+     * Builds and boot a DrupalConsoleCore object
+     *
+     * @return \Symfony\Component\DependencyInjection\ContainerBuilder
+     */
+    protected function bootDrupalConsoleCore()
+    {
+        $drupal = new DrupalConsoleCore(
+            $this->drupalFinder->getComposerRoot(),
+            $this->drupalFinder->getDrupalRoot()
+        );
+
+        return $drupal->boot();
+    }
+
+    /**
+     * Validate if flow should redirect to DrupalCore
+     *
+     * @param  $container
+     * @return bool
+     */
+    protected function shouldRedirectToDrupalCore($container)
+    {
+        if (!Database::getConnectionInfo()) {
+            return true;
+        }
+
+        if (!$container->has('database')) {
+            return true;
+        }
+
+
+        return !$container->get('database')->schema()->tableExists('sessions');
+    }
 }