update.py: error out with unexpected arguments

It's easy to forget you need to use -l to specify the list of layers to
update and previously we just ignored unused arguments, so check for
them and error out if present.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/layerindex/update.py b/layerindex/update.py
index 1582d80163..c32d8cc684 100755
--- a/layerindex/update.py
+++ b/layerindex/update.py
@@ -179,6 +179,10 @@ def main():
 
 
     options, args = parser.parse_args(sys.argv)
+    if len(args) > 1:
+        logger.error('unexpected argument "%s"' % args[1])
+        parser.print_help()
+        sys.exit(1)
 
     # Get access to our Django model
     newpath = os.path.abspath(os.path.dirname(os.path.abspath(sys.argv[0])) + '/..')