print out error message with bad args
diff --git a/example/example_server.dart b/example/example_server.dart
index aedefa1..c051e79 100644
--- a/example/example_server.dart
+++ b/example/example_server.dart
@@ -11,7 +11,19 @@
import 'package:shelf_static/shelf_static.dart';
void main(List<String> args) {
- var result = _getParser().parse(args);
+ var parser = _getParser();
+
+ ArgResults result;
+ try {
+ result = parser.parse(args);
+ } on FormatException catch (e) {
+ stderr.writeln(e.message);
+ stderr.writeln(parser.usage);
+ // http://linux.die.net/include/sysexits.h
+ // #define EX_USAGE 64 /* command line usage error */
+ exit(64);
+ }
+
var logging = result['logging'];
if (!FileSystemEntity.isFileSync('example/example_server.dart')) {
