src/goLanguageServer: fix missing gopls detection logic

src/goInstallTools.ts

@@ -544,9 +544,7 @@ function getMissingTools(goVersion: GoVersion): Promise<Tool[]> {
 			(tool) =>
 				new Promise<Tool>((resolve, reject) => {
 					const toolPath = getBinPath(tool.name);
-					fs.exists(toolPath, (exists) => {
-						resolve(exists ? null : tool);
-					});
+					resolve(path.isAbsolute(toolPath) ? null : tool);
 				})
 		)
 	).then((res) => {

src/goLanguageServer.ts

@@ -298,9 +298,10 @@ Please install it and reload this VS Code window.`
 		if (alternateTools['go-langserver']) {
 			vscode.window.showErrorMessage(`Support for "go-langserver" has been deprecated.
 The recommended language server is gopls. Delete the alternate tool setting for "go-langserver" to use gopls, or change "go-langserver" to "gopls" in your settings.json and reload the VS Code window.`);
+			return;
 		}
-		return;
 	}
+
 	// Prompt the user to install gopls.
 	promptForMissingTool('gopls');
 }