As far as I understand, it is not possible to generate union types when generating a TS client library from a Go application. Here's an example:

Input

type Season string

const (
  SeasonSummer Season = "Summer"
  SeasonAutumn Season = "Autumn"
  SeasonWinter Season = "Winter"
  SeasonSpring Season = "Spring"
)

type SomeType struct {
  Season Season `json:"season"`
}

Expected output

export interface SomeType {
  season: "Summer" | "Autumn" | "Winter" | "Spring"
}

Actual output

export interface SomeType {
  season: string
}

I.e. in order to strongly type season in my TypeScript application (as in my Go API), I would need to write a custom union type and hence maintain it both in TS and Go which defeats the purpose of generating a type for this example. Ideally, the generated TS type would be a union type but a TS enum would also be OK:

enum Season {
  SeasonSummer Season = "Summer"
  SeasonAutumn Season = "Autumn"
  SeasonWinter Season = "Winter"
  SeasonSpring Season = "Spring"
}

Thanks in advance!