eva-config-dependency.patch

diff --git a/src/Plugin/views/display/Eva.php b/src/Plugin/views/display/Eva.php
index 6adb305..0fa8c30 100644
--- a/src/Plugin/views/display/Eva.php
+++ b/src/Plugin/views/display/Eva.php
@@ -205,10 +205,34 @@ class Eva extends DisplayPluginBase {
   }
 
   public function remove() {
-    // clean up display configs before the display disappears
-    $longname = $this->view->storage->get('id') . '_' . $this->display['id'];
+    $view_id = $this->view->storage->get('id');
+
+    // clean up view and display configs before the display disappears
+    $longname = $view_id . '_' . $this->display['id'];
     _eva_clear_detached($longname);
 
+    // check the view config -- if there are no longer any Evas, remove the dependency
+    $cf = \Drupal::configFactory();
+    $config = $cf->getEditable('views.view.' . $view_id);
+    $config_data = $config->get();
+    $eva_count = 0;
+    foreach ($config_data['display'] as $display_id => $display) {
+      // ignore -- this one is getting removed anyway
+      if ($display_id == $this->display['id']) {
+        continue;
+      }
+      // there's another display that's still using Eva
+      if ($display['display_plugin'] == 'entity_view') {
+        $eva_count += 1;
+      }
+    }
+    // no Eva's? Remove the dependency
+    if ($eva_count == 0) {
+      unset($config_data['dependencies']['module']['eva']);
+      $config->setData($config_data);
+      $config->save();
+    }
+
     parent::remove();
   }