Status bar item for Modules usage

src/goMain.ts

@@ -322,6 +322,11 @@ export function activate(ctx: vscode.ExtensionContext): void {
 
 	initCoverageDecorators(ctx);
 
+	ctx.subscriptions.push(vscode.commands.registerCommand('go.open.modulewiki', async () => {
+		vscode.commands.executeCommand('vscode.open', vscode.Uri.parse('https://github.com/microsoft/vscode-go/wiki/Go-modules-support-in-Visual-Studio-Code'));
+	}));
+	showHideStatus(vscode.window.activeTextEditor);
+
 	const testCodeLensProvider = new GoRunTestCodeLensProvider();
 	const referencesCodeLensProvider = new GoReferencesCodeLensProvider();
 

src/goStatus.ts

@@ -7,26 +7,36 @@
 
 import { GO_MODE } from './goMode';
 import vscode = require('vscode');
+import { isModSupported } from './goModules';
 
 export let outputChannel = vscode.window.createOutputChannel('Go');
 
 export let diagnosticsStatusBarItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left);
 
 let statusBarEntry: vscode.StatusBarItem;
+const statusBarItemModule = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left);
+statusBarItemModule.text = '$(megaphone) Go Modules';
+statusBarItemModule.tooltip = 'Modules is enabled for this project. Click to learn more about Modules support in VS Code.';
+statusBarItemModule.command = 'go.open.modulewiki';
 
-export function showHideStatus() {
-	if (!statusBarEntry) {
-		return;
-	}
-	if (!vscode.window.activeTextEditor) {
-		statusBarEntry.hide();
-		return;
-	}
-	if (vscode.languages.match(GO_MODE, vscode.window.activeTextEditor.document)) {
-		statusBarEntry.show();
-		return;
+export function showHideStatus(editor: vscode.TextEditor) {
+	if (statusBarEntry) {
+		if (!editor) {
+			statusBarEntry.hide();
+		} else if (vscode.languages.match(GO_MODE, editor.document)) {
+			statusBarEntry.show();
+		} else {
+			statusBarEntry.hide();
+		}
 	}
-	statusBarEntry.hide();
+
+	isModSupported(editor.document.uri).then(isMod => {
+		if (isMod) {
+			statusBarItemModule.show();
+		} else {
+			statusBarItemModule.hide();
+		}
+	});
 }
 
 export function hideGoStatus() {