src/welcome: mention that dlv-dap is the default debug adapter

Minor change: Add the link to stackoverflow (Questions) in the welcome page.
The welcome page will show only with v0.27.0 or in preview mode.

Updates #1657

Change-Id: Ia2d1f5e2520ae96a5dc3cbb287a1695490392a54
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/339099
Trust: Hyang-Ah Hana Kim <[email protected]>
Run-TryBot: Hyang-Ah Hana Kim <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Suzy Mueller <[email protected]>

Author: hyangah

src/goMain.ts

@@ -710,10 +710,10 @@ If you would like additional configuration for diagnostics from gopls, please se
 function showGoWelcomePage(ctx: vscode.ExtensionContext) {
 	// Update this list of versions when there is a new version where we want to
 	// show the welcome page on update.
-	const showVersions: string[] = ['0.22.0'];
+	const showVersions: string[] = ['0.27.0'];
 	// TODO(hyangah): use the content hash instead of hard-coded string.
 	// https://github.com/golang/vscode-go/issue/1179
-	let goExtensionVersion = '0.22.0';
+	let goExtensionVersion = '0.27.0';
 	let goExtensionVersionKey = 'go.extensionVersion';
 	if (isInPreviewMode()) {
 		goExtensionVersion = '0.0.0';

src/welcome.ts

@@ -108,6 +108,7 @@ export class WelcomePanel {
 		// Local path to css styles and images
 		const scriptPathOnDisk = joinPath(this.dataroot, 'welcome.js');
 		const stylePath = joinPath(this.dataroot, 'welcome.css');
+		const announcePath = vscode.Uri.joinPath(this.dataroot, 'announce.png');
 		const gopherPath = joinPath(this.dataroot, 'go-logo-blue.png');
 		const goExtension = vscode.extensions.getExtension(extensionId)!;
 		const goExtensionVersion = goExtension.packageJSON.version;
@@ -116,6 +117,7 @@ export class WelcomePanel {
 		const scriptURI = webview.asWebviewUri(scriptPathOnDisk);
 		const stylesURI = webview.asWebviewUri(stylePath);
 		const gopherURI = webview.asWebviewUri(gopherPath);
+		const announceURI = webview.asWebviewUri(announcePath);
 
 		// Use a nonce to only allow specific scripts to be run
 		const nonce = getNonce();
@@ -147,11 +149,24 @@ export class WelcomePanel {
 						-->
 						<li><a href="#" class="Command" data-command="openDocument" data-document="CHANGELOG.md">Release notes</a></li>
 						<li><a href="https://github.com/golang/vscode-go">GitHub</a></li>
+						<li><a href="https://stackoverflow.com/questions/tagged/go+visual-studio-code">Questions</a></li>
 						<li><a href="https://invite.slack.golangbridge.org/">Slack</a></li>
 					</ul>
 				</div>
 			</div>
 
+			<div class="Announcement">
+				<img src="${announceURI}" alt="announce" class="Announcement-image" />
+				<p>
+					Heads up!
+					The extension now uses Delve's native DAP implementation (<a href="https://github.com/go-delve/delve/blob/master/Documentation/usage/dlv_dap.md">dlv-dap</a>)
+					for local debugging. We updated the <a href="https://github.com/golang/vscode-go/blob/master/docs/debugging.md">
+					Documentation for Debugging</a> to show the new features available with dlv-dap.
+					This change does not apply to remote debugging yet. For remote debugging, keep following
+					the instruction in the <a href="https://github.com/golang/vscode-go/blob/master/docs/debugging-legacy.md">old documentation</a>.
+				</p>
+			</div>
+
 			<div class="Cards">
 				<div class="Card">
 					<div class="Card-inner">