From 65c46e9e418c2aada554092495ba92d68c853c15 Mon Sep 17 00:00:00 2001
From: Matthew Grasmick <matthew.grasmick@acquia.com>
Date: Thu, 17 Nov 2016 11:50:46 -0500
Subject: [PATCH] Deleting active configuration when features module with
 conflicting config is installed.

---
 features.module         | 37 +++++++++++++++++++++++++++++++++++++
 src/FeaturesManager.php |  4 ++--
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/features.module b/features.module
index 3fccc79..79ed10d 100644
--- a/features.module
+++ b/features.module
@@ -54,3 +54,40 @@ function features_modules_installed($modules) {
     $assigner->purgeConfiguration();
   }
 }
+
+/**
+ * Implements hook_module_preinstall().
+ */
+function features_module_preinstall($module) {
+
+  $extension = \Drupal::moduleHandler()->getModule($module);
+  /** @var \Drupal\features\FeaturesManagerInterface $manager */
+  $manager = \Drupal::service('features.manager');
+  if (!$manager->isFeatureModule($extension, NULL)) {
+    return FALSE;
+  }
+
+  $package = $manager->loadPackage($module, TRUE);
+  $config = $package->getConfig();
+  if (empty($config['replace_active_config_on_install'])) {
+    return FALSE;
+  }
+
+  // Config rewrites are stored in 'modulename/config/install'.
+  $config_install_dir = $extension->getPath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'install';
+
+  // Scan the rewrite directory for rewrites.
+  if (file_exists($config_install_dir) && $files = file_scan_directory($config_install_dir, '/^.*\.yml$/i')) {
+    foreach ($files as $file) {
+      // Parse the rewrites and retrieve the original config.
+      $original_config = \Drupal::configFactory()->getEditable($file->name);
+      if ($original_config) {
+        $original_config->delete();
+      }
+
+      // Log a message indicating whether the config was rewritten or not.
+      $message = t("@config_name was deleted from active configuration by features because @module defines the same config and has replace_active_config_on_install enabled.", ['@config_name' => $file->name, '@module' => $extension->getName()]);
+      \Drupal::logger('features')->info($message);
+    }
+  }
+}
diff --git a/src/FeaturesManager.php b/src/FeaturesManager.php
index 67a1091..271592c 100644
--- a/src/FeaturesManager.php
+++ b/src/FeaturesManager.php
@@ -304,8 +304,8 @@ class FeaturesManager implements FeaturesManagerInterface {
     if ($any && !isset($package)) {
       // See if this is a non-features module.
       $module_list = $this->moduleHandler->getModuleList();
-      if (!empty($module_list[$module])) {
-        $extension = $module_list[$module];
+      if (!empty($module_list[$module_name])) {
+        $extension = $module_list[$module_name];
         $package = $this->initPackageFromExtension($extension);
         $config = $this->listExtensionConfig($extension);
         $package->setConfig($config);
-- 
2.10.0