How to save fastify swagger api description to local file

Question

Hi is there is any possibility to save API swagger YAML to local file when starting the project? I'm using fastify-swagger plugin

using exposeRoute enable true and call '/documentation/yaml' API allowed to download YAML via the browser but i need to generate and save this YAML file to local inside the project when initially start the project.

Answer 1

Yes, you can do it like this:

// .. your code
fastify.register(require('fastify-swagger'), { ... })
await fastify.listen(8080)

// after the ready or listen call
const yaml = fastify.swagger({ yaml: true })
require('fs').writeFileSync('./swagger.yml', yaml)