嵌入式结构获取所有标签并根据标签为所有字段设置值

I'm designing config component where I want to set ENV variable for each field on go struct.

e.g.

type SubStruct struct {
    Field int `env:"ENV_INT"`
}

type Config struct {
    Name string `env:"APP_NAME"`
    Sub1 struct {
        Sub11 struct {
            Value string `env:"ENV_VAR"`
        }
        Sub12 SubStruct
    } 
} 

What I want to achieve is to:

1. Get values of all env keys recursively
2. Set value based on field type

So there are basically two questions:

• Is there any lib in go which exposes methods for setting values using reflection (e.g. like private methods in json package)?

• Is there any method/function in go which can parse your struct recursively and get all tags from struct?

edit: - updated structs - renamed confusing field names (from embed to sub)