adding fields limitation for EntityPicker

Signed-off-by: Ladislav Vitásek <vity@vity.cz>

.changeset/four-walls-perform.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder': minor
+---
+
+Scaffolding - EntityPicker component - now it does not load full entity data, only a specified set - defaults to `['metadata.name', 'metadata.namespace', 'metadata.title', 'kind']`. It can significantly reduce loaded time bigger data set. It's possible to set fields to ignore configure via `fieldsToIgnore` in UI options of the EntityPicker component.

plugins/scaffolder/src/components/fields/EntityPicker/EntityPicker.tsx

@@ -61,14 +61,24 @@ export const EntityPicker = (props: EntityPickerProps) => {
   } = props;
   const catalogFilter = buildCatalogFilter(uiSchema);
   const defaultKind = uiSchema['ui:options']?.defaultKind;
+  const fieldsToIgnore = uiSchema['ui:options']?.fieldsToIgnore;
   const defaultNamespace =
     uiSchema['ui:options']?.defaultNamespace || undefined;
 
   const catalogApi = useApi(catalogApiRef);
 
   const { value: entities, loading } = useAsync(async () => {
+    const defaultFieldsToIgnore = [
+      'metadata.name',
+      'metadata.namespace',
+      'metadata.title',
+      'kind',
+    ];
+    const fields = fieldsToIgnore || defaultFieldsToIgnore;
     const { items } = await catalogApi.getEntities(
-      catalogFilter ? { filter: catalogFilter } : undefined,
+      catalogFilter
+        ? { filter: catalogFilter, fields: fields }
+        : { filter: undefined, fields: fields },
     );
     return items;
   });

plugins/scaffolder/src/components/fields/EntityPicker/schema.ts

@@ -41,6 +41,13 @@ export const EntityPickerFieldSchema = makeFieldSchemaFromZod(
       .describe(
         'DEPRECATED: Use `catalogFilter` instead. List of kinds of entities to derive options from',
       ),
+    fieldsToIgnore: z
+      .array(z.string())
+      .optional()
+      .describe(
+        'Fields to ignore from loading - download only the parts of each entity that match the field declarations.' +
+          " Defaults to: fields: ['metadata.name', 'metadata.namespace', 'metadata.title', 'kind']",
+      ),
     defaultKind: z
       .string()
       .optional()