feat: experiment enlistment code

package.json

@@ -154,6 +154,7 @@
     "onDebugResolve:chrome",
     "onDebugResolve:NAMESPACE(node)",
     "onDebugResolve:NAMESPACE(node-terminal)",
+    "onCommand:extension.js-debug.experimentEnlist",
     "onCommand:extension.NAMESPACE(node-debug).pickNodeProcess",
     "onCommand:extension.NAMESPACE(node-debug).prettyPrint",
     "onCommand:extension.NAMESPACE(node-debug).toggleSkippingFile",

src/common/contributionUtils.ts

@@ -2,7 +2,13 @@
  * Copyright (C) Microsoft Corporation. All rights reserved.
  *--------------------------------------------------------*/
 
-import { Command, WorkspaceConfiguration, WorkspaceFolder, commands } from 'vscode';
+import {
+  Command,
+  WorkspaceConfiguration,
+  WorkspaceFolder,
+  commands,
+  ConfigurationTarget,
+} from 'vscode';
 import { ITerminalLaunchConfiguration } from '../configuration';
 
 export const enum Contributions {
@@ -13,6 +19,7 @@ export const enum Contributions {
   DebugNpmScript = 'extension.NAMESPACE(node-debug).npmScript',
   CreateDebuggerTerminal = 'extension.NAMESPACE(node-debug).createDebuggerTerminal',
 
+  EnlistExperimentCommand = 'extension.js-debug.experimentEnlist',
   AddCustomBreakpointsCommand = 'extension.NAMESPACE(chrome-debug).addCustomBreakpoints',
   RemoveCustomBreakpointCommand = 'extension.NAMESPACE(chrome-debug).removeCustomBreakpoint',
   RemoveAllCustomBreakpointsCommand = 'extension.NAMESPACE(chrome-debug).removeAllCustomBreakpoints',
@@ -68,6 +75,7 @@ export interface ICommandTypes {
   [Contributions.CreateDebuggerTerminal]: { args: [string?, WorkspaceFolder?]; out: void };
   [Contributions.ToggleSkippingCommand]: { args: [string | number]; out: void };
   [Contributions.PrettyPrintCommand]: { args: []; out: void };
+  [Contributions.EnlistExperimentCommand]: { args: []; out: void };
 }
 
 /**
@@ -113,4 +121,5 @@ export const writeConfig = <K extends keyof IConfigurationTypes>(
   config: WorkspaceConfiguration,
   key: K,
   value: IConfigurationTypes[K],
-) => config.update(key, value);
+  target?: ConfigurationTarget,
+) => config.update(key, value, target);

src/extension.ts

@@ -20,6 +20,7 @@ import { IDebugConfigurationProvider } from './ui/configuration';
 import { registerCompanionBrowserLaunch } from './ui/companionBrowserLaunch';
 import { tmpdir } from 'os';
 import { PrettyPrintTrackerFactory } from './ui/prettyPrint';
+import { toggleOnExperiment } from './ui/experimentEnlist';
 
 // eslint-disable-next-line
 const packageJson = require('../package.json');
@@ -42,6 +43,7 @@ export function activate(context: vscode.ExtensionContext) {
     registerCommand(vscode.commands, Contributions.PickProcessCommand, pickProcess),
     registerCommand(vscode.commands, Contributions.AttachProcessCommand, attachProcess),
     registerCommand(vscode.commands, Contributions.ToggleSkippingCommand, toggleSkippingFile),
+    registerCommand(vscode.commands, Contributions.EnlistExperimentCommand, toggleOnExperiment),
   );
 
   context.subscriptions.push(

src/ui/experimentEnlist.ts

@@ -0,0 +1,25 @@
+/*---------------------------------------------------------
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import * as nls from 'vscode-nls';
+import { writeConfig, Configuration } from '../common/contributionUtils';
+
+const localize = nls.loadMessageBundle();
+
+export const toggleOnExperiment = async () => {
+  await writeConfig(
+    vscode.workspace.getConfiguration(),
+    Configuration.UsePreviewDebugger,
+    true,
+    vscode.ConfigurationTarget.Global,
+  );
+
+  await vscode.window.showInformationMessage(
+    localize(
+      'experimentEnlist',
+      'You can turn the new debugger off using the "debug.javascript.usePreview" setting. Please report any problems you run into, thanks for trying it out!',
+    ),
+  );
+};