You should see a list like this: -h, --help show this help message and exit -v [], --verbose [] verbose mode -l, --lang client language to generate (maybe class name in classpath, required) -o, ...
Swagger v3 (also known as OpenAPI 3) is really different from the v2. For the specification have a look at: A Visual Guide to What's New in Swagger 3.0 This means that a lot of the generators needs to ...