Adjust to review by making schedule optional

Signed-off-by: Philipp Hugenroth <philipph@spotify.com>

plugins/linguist-backend/config.d.ts

@@ -15,7 +15,7 @@
  */
 
 import { TaskScheduleDefinition } from '@backstage/backend-tasks';
-import { HumanDuration } from '@backstage/types';
+import { HumanDuration, JsonObject } from '@backstage/types';
 
 export interface Config {
   /** Configuration options for the linguist plugin */
@@ -40,7 +40,7 @@ export interface Config {
     /**
      * [linguist-js](https://www.npmjs.com/package/linguist-js) options
      */
-    linguistJsOptions?: object;
+    linguistJsOptions?: JsonObject;
 
     /** Options for the tags processor */
     tagsProcessor?: {

plugins/linguist-backend/src/plugin.ts

@@ -19,20 +19,11 @@ import {
   coreServices,
   createBackendPlugin,
 } from '@backstage/backend-plugin-api';
-import {
-  TaskScheduleDefinition,
-  readTaskScheduleDefinitionFromConfig,
-} from '@backstage/backend-tasks';
+import { readTaskScheduleDefinitionFromConfig } from '@backstage/backend-tasks';
 import { HumanDuration } from '@backstage/types';
 
 import { createRouter } from './service/router';
 
-const DEFAULT_SCHEDULE: TaskScheduleDefinition = {
-  frequency: { minutes: 2 },
-  timeout: { minutes: 15 },
-  initialDelay: { seconds: 15 },
-};
-
 /**
  * Linguist backend plugin
  *
@@ -62,11 +53,12 @@ export const linguistPlugin = createBackendPlugin({
         tokenManager,
         httpRouter,
       }) {
-        const schedule = config.has('linguist.schedule')
-          ? readTaskScheduleDefinitionFromConfig(
-              config.getConfig('linguist.schedule'),
-            )
-          : DEFAULT_SCHEDULE;
+        let schedule;
+        if (config.has('linguist.schedule')) {
+          schedule = readTaskScheduleDefinitionFromConfig(
+            config.getConfig('linguist.schedule'),
+          );
+        }
         const batchSize = config.getOptionalNumber('linguist.batchSize');
         const useSourceLocation = config.getBoolean(
           'linguist.useSourceLocation',