deprecated taskWorkers option in RouterOption

Signed-off-by: Hao Luo <howlowck@gmail.com>

.changeset/little-chairs-dance.md

@@ -1,12 +1,11 @@
 ---
 '@backstage/plugin-scaffolder-backend': minor
 ---
+Deprecated the `taskWorkers` option in RouterOptions in favor of `concurrentTasksLimit` which sets the limit of concurrentTasks in a single TaskWorker
 
-Added optional "concurrentTasksLimit" option to TaskWorker
+TaskWorker can now run multiple (defaults to 10) tasks concurrently using the `concurrentTasksLimit` option available in both `RouterOptions` and `CreateWorkerOptions`.
 
-TaskWorker can now run multiple (defaults to 10) tasks concurrently.
-
-To use the option, in `createRouter`:
+To use the option to create a TaskWorker:
 
 ```diff
 const worker = await TaskWorker.create({

plugins/scaffolder-backend/src/service/router.ts

@@ -67,7 +67,16 @@ export interface RouterOptions {
   scheduler?: PluginTaskScheduler;
 
   actions?: TemplateAction<any>[];
+  /**
+   * @deprecated taskWorkers is deprecated in favor of concurrentTasksLimit option with a single TaskWorker
+   * @default 1
+   */
   taskWorkers?: number;
+  /**
+   * Sets the number of concurrent tasks that can be run at any given time on the TaskWorker
+   * @default 10
+   */
+  concurrentTasksLimit?: number;
   taskBroker?: TaskBroker;
   additionalTemplateFilters?: Record<string, TemplateFilter>;
   additionalTemplateGlobals?: Record<string, TemplateGlobal>;
@@ -160,6 +169,7 @@ export async function createRouter(
     catalogClient,
     actions,
     taskWorkers,
+    concurrentTasksLimit,
     scheduler,
     additionalTemplateFilters,
     additionalTemplateGlobals,
@@ -211,6 +221,7 @@ export async function createRouter(
       workingDirectory,
       additionalTemplateFilters,
       additionalTemplateGlobals,
+      concurrentTasksLimit,
     });
     workers.push(worker);
   }