terraform/vendor/github.com/docker/libcompose/config/utils.go

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package config
func merge(existing, value interface{}) interface{} {
// append strings
if left, lok := existing.([]interface{}); lok {
if right, rok := value.([]interface{}); rok {
return append(left, right...)
}
}
//merge maps
if left, lok := existing.(map[interface{}]interface{}); lok {
if right, rok := value.(map[interface{}]interface{}); rok {
newLeft := make(map[interface{}]interface{})
for k, v := range left {
newLeft[k] = v
}
for k, v := range right {
newLeft[k] = v
}
return newLeft
}
}
return value
}
func clone(in RawService) RawService {
result := RawService{}
for k, v := range in {
result[k] = v
}
return result
}
func asString(obj interface{}) string {
if v, ok := obj.(string); ok {
return v
}
return ""
}