jgroeneveld/configurate

configurate is a simple configuration library.

It can load from JSON files, OS Environment, accepts defaults and it treats every value as required unless its a pointer.

Example:

config := struct {
    AppName         string  `json:"app_name"`
    NumberOfRetries int     `json:"number_of_retries" env:"NUMBER_OF_RETRIES"`
    Version         string  `json:"version" default:"1.0"`
    AnOptional      *string `json:"an_optional"`
}{}

err := configurate.LoadFile("config.json", &config)

Adding sources / loaders

configurate uses a Loader interface and the LoadAll method to be extendable.

Just make sure the order of the loaders makes sense.

type Loader interface {
    Load(target interface{}) error
}

err := configurate.LoadAll(&target, loader1, loader2)

Interesting loaders would be more formats or a consul extension.