Revert "Revert "Fix accidently starting all onTaskType extensions when running a build command""

Author: meganrogge

src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts

@@ -723,7 +723,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 		});
 	}
 
-	public async getTask(folder: IWorkspace | IWorkspaceFolder | string, identifier: string | ITaskIdentifier, compareId: boolean = false): Promise<Task | undefined> {
+	public async getTask(folder: IWorkspace | IWorkspaceFolder | string, identifier: string | ITaskIdentifier, compareId: boolean = false, type: string | undefined = undefined): Promise<Task | undefined> {
 		if (!(await this._trust())) {
 			return;
 		}
@@ -760,7 +760,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 		}
 
 		// We didn't find the task, so we need to ask all resolvers about it
-		const map = await this._getGroupedTasks();
+		const map = await this._getGroupedTasks({ type });
 		let values = map.get(folder);
 		values = values.concat(map.get(USER_TASKS_GROUP_KEY));
 
@@ -1834,11 +1834,12 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 			await this._updateWorkspaceTasks();
 			const taskFolder = task.getWorkspaceFolder();
 			const taskIdentifier = task.configurationProperties.identifier;
+			const taskType = CustomTask.is(task) ? task.customizes()?.type : (ContributedTask.is(task) ? task.type : undefined);
 			// Since we save before running tasks, the task may have changed as part of the save.
 			// However, if the TaskRunSource is not User, then we shouldn't try to fetch the task again
 			// since this can cause a new'd task to get overwritten with a provided task.
 			taskToRun = ((taskFolder && taskIdentifier && (runSource === TaskRunSource.User))
-				? await this.getTask(taskFolder, taskIdentifier) : task) ?? task;
+				? await this.getTask(taskFolder, taskIdentifier, false, taskType) : task) ?? task;
 		}
 		await ProblemMatcherRegistry.onReady();
 		const executeResult = runSource === TaskRunSource.Reconnect ? this._getTaskSystem().reconnect(taskToRun, resolver) : this._getTaskSystem().run(taskToRun, resolver);

src/vs/workbench/contrib/tasks/common/taskDefinitionRegistry.ts

@@ -83,6 +83,13 @@ namespace Configuration {
 
 const taskDefinitionsExtPoint = ExtensionsRegistry.registerExtensionPoint<Configuration.ITaskDefinition[]>({
 	extensionPoint: 'taskDefinitions',
+	activationEventsGenerator: (contributions: Configuration.ITaskDefinition[], result: { push(item: string): void }) => {
+		for (const task of contributions) {
+			if (task.type) {
+				result.push(`onTaskType:${task.type}`);
+			}
+		}
+	},
 	jsonSchema: {
 		description: nls.localize('TaskDefinitionExtPoint', 'Contributes task kinds'),
 		type: 'array',