func (v *Viper) IsSet(key string) bool {
path := strings.Split(key, v.keyDelim)
lcaseKey := strings.ToLower(key)
val := v.find(lcaseKey)
if val == nil {
source := v.find(strings.ToLower(path[0]))
if source != nil {
if reflect.TypeOf(source).Kind() == reflect.Map {
val = v.searchMap(cast.ToStringMap(source), path[1:])
}
}
}
return val != nil
}
func (v *Viper) searchMap(source map[string]interface{}, path []string) interface{} {
if len(path) == 0 {
return source
}
if next, ok := source[path[0]]; ok {
switch next.(type) {
case map[interface{}]interface{}:
return v.searchMap(cast.ToStringMap(next), path[1:])
case map[string]interface{}:
// Type assertion is safe here since it is only reached
// if the type of `next` is the same as the type being asserted
return v.searchMap(next.(map[string]interface{}), path[1:])
default:
return next
}
} else {
return nil
}
}
// Given a key, find the value
// Viper will check in the following order:
// flag, env, config file, key/value store, default
// Viper will check to see if an alias exists first
func (v *Viper) find(key string) interface{} {
var val interface{}
var exists bool
// if the requested key is an alias, then return the proper key
key = v.realKey(key)
// PFlag Override first
flag, exists := v.pflags[key]
if exists && flag.Changed {
jww.TRACE.Println(key, "found in override (via pflag):", flag.Value)
switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
return cast.ToInt(flag.Value.String())
case "bool":
return cast.ToBool(flag.Value.String())
default:
return flag.Value.String()
}
}
val, exists = v.override[key]
if exists {
jww.TRACE.Println(key, "found in override:", val)
return val
}
if v.automaticEnvApplied {
// even if it hasn't been registered, if automaticEnv is used,
// check any Get request
if val = v.getEnv(v.mergeWithEnvPrefix(key)); val != "" {
jww.TRACE.Println(key, "found in environment with val:", val)
return val
}
}
envkey, exists := v.env[key]
if exists {
jww.TRACE.Println(key, "registered as env var", envkey)
if val = v.getEnv(envkey); val != "" {
jww.TRACE.Println(envkey, "found in environment with val:", val)
return val
} else {
jww.TRACE.Println(envkey, "env value unset:")
}
}
val, exists = v.config[key]
if exists {
jww.TRACE.Println(key, "found in config:", val)
return val
}
// Test for nested config parameter
if strings.Contains(key, v.keyDelim) {
path := strings.Split(key, v.keyDelim)
source := v.find(path[0])
if source != nil {
if reflect.TypeOf(source).Kind() == reflect.Map {
val := v.searchMap(cast.ToStringMap(source), path[1:])
jww.TRACE.Println(key, "found in nested config:", val)
return val
}
}
}
val, exists = v.kvstore[key]
if exists {
jww.TRACE.Println(key, "found in key/value store:", val)
return val
}
val, exists = v.defaults[key]
if exists {
jww.TRACE.Println(key, "found in defaults:", val)
return val
}
return nil
}
func (v *Viper) GetStringMap(key string) map[string]interface{} {
return cast.ToStringMap(v.Get(key))
}
func (v *Viper) Get(key string) interface{} {
path := strings.Split(key, v.keyDelim)
lcaseKey := strings.ToLower(key)
val := v.find(lcaseKey)
if val == nil {
source := v.find(path[0])
if source != nil {
if reflect.TypeOf(source).Kind() == reflect.Map {
val = v.searchMap(cast.ToStringMap(source), path[1:])
}
}
}
// if no other value is returned and a flag does exist for the value,
// get the flag's value even if the flag's value has not changed
if val == nil {
if flag, exists := v.pflags[lcaseKey]; exists {
jww.TRACE.Println(key, "get pflag default", val)
switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
val = cast.ToInt(flag.Value.String())
case "bool":
val = cast.ToBool(flag.Value.String())
default:
val = flag.Value.String()
}
}
}
if val == nil {
return nil
}
var valType interface{}
if !v.typeByDefValue {
valType = val
} else {
defVal, defExists := v.defaults[lcaseKey]
if defExists {
valType = defVal
} else {
valType = val
}
}
switch valType.(type) {
case bool:
return cast.ToBool(val)
case string:
return cast.ToString(val)
case int64, int32, int16, int8, int:
return cast.ToInt(val)
case float64, float32:
return cast.ToFloat64(val)
case time.Time:
return cast.ToTime(val)
case time.Duration:
return cast.ToDuration(val)
case []string:
return cast.ToStringSlice(val)
}
return val
}