Config is used to configure the execution of the converter.

Runner knows how to run everything together, based on the config values if config.Download is set, it will use the fetcher, otherwise it will use Reader to read stdin or files.

Convertible is any struct which knows how to convert itself to NVD CVE Item.

FetchSince knows how to fetch vulnerabilities from an API it should create a new channel, fetch everything concurrently and close the channel.

Read should read the vulnerabilities from the given reader and push them into the channel The contents of the reader should be a slice of structs which are convertibles channel will be created and mustn't be closed.