Case sensitive problems

[ghpu]

Koanf version 1.4.4

I have a yaml conf like this :

env:
   name: toto

which I load with :

type MyStruct struct {
Name string `koanf:"name"`
}

var env MyStruct
k:= koanf.New(".")
k.Load(file.Provider("conf.yaml"), parser)
k.Unmarshal("env", &env)

If I change "name" to "Name", the value "toto" is still parsed into env.Name !

However, if i register default values first

k.Load(confmap.Provider(map[string]interface{}{
"env.name": nil
},"."), nil)

Then the case sensitive is working as expected, and env.Name remains empty .

[knadh]

All keys are case-sensitive inside koanf's confmap, but the mapstructure lib that it uses to unmarshal the keys into struct does ~fuzzy matching of names on struct field tags. To enforce, case sensitivity there, you can pass a matcher function to mapstructure's DecoderConfig.

eg:

ko.UnmarshalWithConf("key", &o, koanf.UnmarshalConf{DecoderConfig: &mapstructure.DecoderConfig{...}})

See: mitchellh/mapstructure#250