How to run swagger-codegen for OpenAPI 3.0.0

Question

looks like official swagger for openapi specification V3 support is near release https://blog.readme.io/an-example-filled-guide-to-swagger-3-2/, and the swagger-codegen has

Answer 1

Swagger-codegen 3.0.0 snapshots now include a limited number of targets for code generation from OpenAPI 3.0 definitions. https://github.com/swagger-api/swagger-codegen/issues/6598#issuecomment-333428808

There is an alternative experimental implementation of the codegen engine, using the original swagger-codegen 2.x templates, written in Node.js: https://github.com/mermade/openapi-codegen - if your language is not yet supported, a config file just needs to be created for it mapping the template files to outputs.