CLI: --add stops working. Fixes #68595

src/vs/code/electron-main/windows.ts

@@ -511,7 +511,7 @@ export class WindowsManager implements IWindowsMainService {
 		// Handle folders to add by looking for the last active workspace (not on initial startup)
 		if (!openConfig.initialStartup && foldersToAdd.length > 0) {
 			const authority = getRemoteAuthority(foldersToAdd[0]);
-			const lastActiveWindow = authority ? this.getLastActiveWindowForAuthority(authority) : undefined;
+			const lastActiveWindow = this.getLastActiveWindowForAuthority(authority);
 			if (lastActiveWindow) {
 				usedWindows.push(this.doAddFoldersToExistingWindow(lastActiveWindow, foldersToAdd));
 			}
@@ -1550,7 +1550,7 @@ export class WindowsManager implements IWindowsMainService {
 		return getLastActiveWindow(WindowsManager.WINDOWS);
 	}
 
-	getLastActiveWindowForAuthority(remoteAuthority: string): ICodeWindow | undefined {
+	getLastActiveWindowForAuthority(remoteAuthority: string | undefined): ICodeWindow | undefined {
 		return getLastActiveWindow(WindowsManager.WINDOWS.filter(w => w.remoteAuthority === remoteAuthority));
 	}
 

src/vs/platform/remote/common/remoteHosts.ts

@@ -7,6 +7,6 @@ import { URI } from 'vs/base/common/uri';
 
 export const REMOTE_HOST_SCHEME = 'vscode-remote';
 
-export function getRemoteAuthority(uri: URI) {
+export function getRemoteAuthority(uri: URI): string | undefined {
 	return uri.scheme === REMOTE_HOST_SCHEME ? uri.authority : undefined;
 }
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