--- a/launch	Thu May 30 20:14:14 2019 -0700
+++ b/launch	Thu May 30 20:16:39 2019 -0700
@@ -28,9 +28,11 @@
 opt("directory", default=".", help="directory to serve", nargs='?')
 opt("path", default="/", help="URL path to serve", nargs='?')
 args = parser.parse_args(sys.argv[1:])
+
 mylog = logging.getLogger(MYNAME)
 mylog.addHandler(logging.StreamHandler())
 mylog.setLevel(logging.DEBUG if args.debug else logging.INFO)
+
 app, errors = launch(fsroot=args.directory, urlroot=args.path, logger=mylog,
     encoding=args.encoding, static=args.static)
 if errors:
@@ -41,3 +43,5 @@
 
 if not args.compile:
     app.run(host=args.bind, port=args.port)
+
+sys.exit(1 if errors else 0)