use wsl.exe on builds as of 16299 (#51182)

src/vs/workbench/parts/terminal/electron-browser/terminalService.ts

@@ -6,6 +6,7 @@
 import * as nls from 'vs/nls';
 import * as pfs from 'vs/base/node/pfs';
 import * as platform from 'vs/base/common/platform';
+import * as os from 'os';
 import { IContextKeyService, IContextKey } from 'vs/platform/contextkey/common/contextkey';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
 import { ILifecycleService } from 'vs/platform/lifecycle/common/lifecycle';
@@ -213,10 +214,21 @@ export class TerminalService extends AbstractTerminalService implements ITermina
 		// module doesn't work if this is not the case. See #27915.
 		const is32ProcessOn64Windows = process.env.hasOwnProperty('PROCESSOR_ARCHITEW6432');
 		const system32Path = `${process.env['windir']}\\${is32ProcessOn64Windows ? 'Sysnative' : 'System32'}`;
+
+		const osVersion = (/(\d+)\.(\d+)\.(\d+)/g).exec(os.release());
+		let useWSLexe = false;
+
+		if (osVersion.length === 4) {
+			const buildNumber = parseInt(osVersion[3]);
+			if (buildNumber >= 16299) {
+				useWSLexe = true;
+			}
+		}
+
 		const expectedLocations = {
 			'Command Prompt': [`${system32Path}\\cmd.exe`],
 			PowerShell: [`${system32Path}\\WindowsPowerShell\\v1.0\\powershell.exe`],
-			'WSL Bash': [`${system32Path}\\bash.exe`],
+			'WSL Bash': [`${system32Path}\\${useWSLexe ? 'wsl.exe' : 'bash.exe'}`],
 			'Git Bash': [
 				`${process.env['ProgramW6432']}\\Git\\bin\\bash.exe`,
 				`${process.env['ProgramW6432']}\\Git\\usr\\bin\\bash.exe`,