func makeUnions()

in pkg/schemaconv/smd.go [185:231]

• 44 lines of code
• 13 McCabe index (conditional complexity)

func makeUnions(extensions map[string]interface{}) ([]schema.Union, error) {
	schemaUnions := []schema.Union{}
	if iunions, ok := extensions["x-kubernetes-unions"]; ok {
		unions, ok := iunions.([]interface{})
		if !ok {
			return nil, fmt.Errorf(`"x-kubernetes-unions" should be a list, got %#v`, unions)
		}
		for _, iunion := range unions {
			union, ok := iunion.(map[interface{}]interface{})
			if !ok {
				return nil, fmt.Errorf(`"x-kubernetes-unions" items should be a map of string to unions, got %#v`, iunion)
			}
			unionMap := map[string]interface{}{}
			for k, v := range union {
				key, ok := k.(string)
				if !ok {
					return nil, fmt.Errorf(`"x-kubernetes-unions" has non-string key: %#v`, k)
				}
				unionMap[key] = v
			}
			schemaUnion, err := makeUnion(unionMap)
			if err != nil {
				return nil, err
			}
			schemaUnions = append(schemaUnions, schemaUnion)
		}
	}

	// Make sure we have no overlap between unions
	fs := map[string]struct{}{}
	for _, u := range schemaUnions {
		if u.Discriminator != nil {
			if _, ok := fs[*u.Discriminator]; ok {
				return nil, fmt.Errorf("%v field appears multiple times in unions", *u.Discriminator)
			}
			fs[*u.Discriminator] = struct{}{}
		}
		for _, f := range u.Fields {
			if _, ok := fs[f.FieldName]; ok {
				return nil, fmt.Errorf("%v field appears multiple times in unions", f.FieldName)
			}
			fs[f.FieldName] = struct{}{}
		}
	}

	return schemaUnions, nil
}