refactor(ngcc): add message text to task outcomes (#36083)

This sets up the task execution to be able to report failed compiles

PR Close #36083

packages/compiler-cli/ngcc/src/execution/api.ts

@@ -71,12 +71,15 @@ export interface Task extends JsonObject {
 }
 
 /** A function to be called once a task has been processed. */
-export type TaskCompletedCallback = (task: Task, outcome: TaskProcessingOutcome) => void;
+export type TaskCompletedCallback =
+    (task: Task, outcome: TaskProcessingOutcome, message: string | null) => void;
 
 /** Represents the outcome of processing a `Task`. */
 export const enum TaskProcessingOutcome {
   /** Successfully processed the target format property. */
   Processed,
+  /** Failed to process the target format. */
+  Failed,
 }
 
 /**

packages/compiler-cli/ngcc/src/execution/cluster/api.ts

@@ -33,6 +33,7 @@ export interface ProcessTaskMessage extends JsonObject {
 export interface TaskCompletedMessage extends JsonObject {
   type: 'task-completed';
   outcome: TaskProcessingOutcome;
+  message: string|null;
 }
 
 /** A message requesting the update of a `package.json` file. */

packages/compiler-cli/ngcc/src/execution/cluster/worker.ts

@@ -30,8 +30,9 @@ export class ClusterWorker {
       throw new Error('Tried to instantiate `ClusterWorker` on the master process.');
     }
 
-    this.compile =
-        createCompileFn((_task, outcome) => sendMessageToMaster({type: 'task-completed', outcome}));
+    this.compile = createCompileFn(
+        (_task, outcome, message) =>
+            sendMessageToMaster({type: 'task-completed', outcome, message}));
   }
 
   run(): Promise<void> {