[fidl] More informative error message for library namespace verification.
Change-Id: I76a4b31e38a914313afc39b872c7814f6a25ef11
diff --git a/style/verify-fidl-libraries.py b/style/verify-fidl-libraries.py
index b847f07..88d263b 100755
--- a/style/verify-fidl-libraries.py
+++ b/style/verify-fidl-libraries.py
@@ -58,7 +58,9 @@
continue
namespace = result.group(1)
if namespace not in args.namespaces:
- print('Invalid namespace %s (%s)' % (namespace, file))
+ print(
+ 'Invalid namespace %s (%s), namespace must begin with one of [%s].'
+ % (namespace, file, ', '.join(NAMESPACES)))
has_errors = True
return 1 if has_errors else 0