Skip emulator setup if preLaunchTask chain includes mention of them

src/debug/getPreLaunchTaskChain.ts

@@ -0,0 +1,50 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import { getTasks, ITask } from '../vsCodeConfig/tasks';
+
+/**
+ * Resolves the full chain of tasks associated with a given `preLaunchTask`.
+ * Recursively follows the `dependsOn` references found in the `tasks.json`.
+ */
+export function getPreLaunchTaskChain(workspace: vscode.WorkspaceFolder, preLaunchTask: string): string[] {
+    const allTasks: ITask[] = getTasks(workspace);
+    const allTasksMap = new Map<string, ITask>();
+
+    for (const task of allTasks) {
+        if (task.label) {
+            allTasksMap.set(task.label, task);
+        }
+    }
+
+    const dependentTasks = new Set<string>();
+
+    function getDependentTasks(name: string): void {
+        if (dependentTasks.has(name)) {
+            return;
+        }
+        dependentTasks.add(name);
+
+        const task = allTasksMap.get(name);
+        if (!task) {
+            return;
+        }
+
+        const dependsOn: unknown = task?.dependsOn;
+        if (typeof dependsOn === 'string') {
+            getDependentTasks(dependsOn);
+        } else if (Array.isArray(dependsOn)) {
+            for (const dep of dependsOn) {
+                if (typeof dep === 'string') {
+                    getDependentTasks(dep);
+                }
+            }
+        }
+    }
+
+    getDependentTasks(preLaunchTask);
+    return Array.from(dependentTasks.values());
+}

src/debug/validatePreDebug.ts

@@ -18,6 +18,7 @@ import { durableUtils } from '../utils/durableUtils';
 import { isPythonV2Plus } from '../utils/programmingModelUtils';
 import { getDebugConfigs, isDebugConfigEqual } from '../vsCodeConfig/launch';
 import { getWorkspaceSetting, tryGetFunctionsWorkerRuntimeForProject } from "../vsCodeConfig/settings";
+import { getPreLaunchTaskChain } from './getPreLaunchTaskChain';
 import { validateDTSConnectionPreDebug } from './storageProviders/validateDTSConnectionPreDebug';
 import { validateNetheriteConnectionPreDebug } from './storageProviders/validateNetheriteConnectionPreDebug';
 import { validateSQLConnectionPreDebug } from './storageProviders/validateSQLConnectionPreDebug';
@@ -32,12 +33,20 @@ export interface IPreDebugContext extends Omit<ISetConnectionSettingContext, 'pr
     projectPath?: string;
 }
 
+const emulatorTaskRegExp: RegExp = /azurite|emulator/i;
+
 export async function preDebugValidate(actionContext: IActionContext, debugConfig: vscode.DebugConfiguration): Promise<IPreDebugValidateResult> {
     const context: IPreDebugContext = Object.assign(actionContext, { action: CodeAction.Debug });
     const workspace: vscode.WorkspaceFolder = getMatchingWorkspace(debugConfig);
     let shouldContinue: boolean;
     context.telemetry.properties.debugType = debugConfig.type;
 
+    // If one of the `preLaunchTasks` already handles starting emulators, assume we can skip our pre-validate setup for them
+    const preLaunchTaskName: string | undefined = debugConfig.preLaunchTask;
+    const preLaunchTaskChain: string[] = preLaunchTaskName ? getPreLaunchTaskChain(workspace, preLaunchTaskName) : [];
+    const hasEmulatorTask: boolean = preLaunchTaskChain.some(label => emulatorTaskRegExp.test(label));
+    context.telemetry.properties.hasEmulatorTask = String(hasEmulatorTask);
+
     try {
         context.telemetry.properties.lastValidateStep = 'funcInstalled';
         const message: string = localize('installFuncTools', 'You must have the Azure Functions Core Tools installed to debug your local functions.');
@@ -62,28 +71,30 @@ export async function preDebugValidate(actionContext: IActionContext, debugConfi
                 context.telemetry.properties.lastValidateStep = 'workerRuntime';
                 await validateWorkerRuntime(context, projectLanguage, context.projectPath);
 
-                switch (durableStorageType) {
-                    case DurableBackend.DTS:
-                        context.telemetry.properties.lastValidateStep = 'dtsConnection';
-                        await validateDTSConnectionPreDebug(context, context.projectPath);
-                        break;
-                    case DurableBackend.Netherite:
-                        context.telemetry.properties.lastValidateStep = 'netheriteConnection';
-                        await validateNetheriteConnectionPreDebug(context, context.projectPath);
-                        break;
-                    case DurableBackend.SQL:
-                        context.telemetry.properties.lastValidateStep = 'sqlDbConnection';
-                        await validateSQLConnectionPreDebug(context, context.projectPath);
-                        break;
-                    case DurableBackend.Storage:
-                    default:
+                if (!hasEmulatorTask) {
+                    switch (durableStorageType) {
+                        case DurableBackend.DTS:
+                            context.telemetry.properties.lastValidateStep = 'dtsConnection';
+                            await validateDTSConnectionPreDebug(context, context.projectPath);
+                            break;
+                        case DurableBackend.Netherite:
+                            context.telemetry.properties.lastValidateStep = 'netheriteConnection';
+                            await validateNetheriteConnectionPreDebug(context, context.projectPath);
+                            break;
+                        case DurableBackend.SQL:
+                            context.telemetry.properties.lastValidateStep = 'sqlDbConnection';
+                            await validateSQLConnectionPreDebug(context, context.projectPath);
+                            break;
+                        case DurableBackend.Storage:
+                        default:
+                    }
+
+                    context.telemetry.properties.lastValidateStep = 'azureWebJobsStorage';
+                    await validateAzureWebJobsStorage(context, context.projectPath);
+
+                    context.telemetry.properties.lastValidateStep = 'emulatorRunning';
+                    shouldContinue = hasEmulatorTask || await validateEmulatorIsRunning(context, context.projectPath);
                 }
-
-                context.telemetry.properties.lastValidateStep = 'azureWebJobsStorage';
-                await validateAzureWebJobsStorage(context, context.projectPath);
-
-                context.telemetry.properties.lastValidateStep = 'emulatorRunning';
-                shouldContinue = await validateEmulatorIsRunning(context, context.projectPath);
             }
         }
     } catch (error) {