Added indexing of nested config values

viper.go

@@ -38,6 +38,9 @@ import (
 	crypt "github.com/xordataexchange/crypt/config"
 )
 
+const INDEX_DELIM = "."
+const ENV_INDEX_DELIM = "__"
+
 var v *Viper
 
 func init() {
@@ -121,7 +124,10 @@ type Viper struct {
 
 	automaticEnvApplied bool
 	envKeyReplacer      *strings.Replacer
+	envToIndex          *strings.Replacer
+	indexToEnv          *strings.Replacer
 
+	index    map[string]interface{}
 	config   map[string]interface{}
 	override map[string]interface{}
 	defaults map[string]interface{}
@@ -135,6 +141,7 @@ type Viper struct {
 func New() *Viper {
 	v := new(Viper)
 	v.configName = "config"
+	v.index = make(map[string]interface{})
 	v.config = make(map[string]interface{})
 	v.override = make(map[string]interface{})
 	v.defaults = make(map[string]interface{})
@@ -149,6 +156,8 @@ func New() *Viper {
 	} else {
 		v.AddConfigPath(wd)
 	}
+	v.indexToEnv = strings.NewReplacer(ENV_INDEX_DELIM, INDEX_DELIM)
+	v.envToIndex = strings.NewReplacer(INDEX_DELIM, ENV_INDEX_DELIM)
 
 	return v
 }
@@ -214,6 +223,8 @@ func (v *Viper) mergeWithEnvPrefix(in string) string {
 // key. This allows env vars which have different keys then the config object
 // keys
 func (v *Viper) getEnv(key string) string {
+	key = v.indexToEnv.Replace(key)
+
 	if v.envKeyReplacer != nil {
 		key = v.envKeyReplacer.Replace(key)
 	}
@@ -317,12 +328,23 @@ func (v *Viper) providerPathExists(p *remoteProvider) bool {
 func Get(key string) interface{} { return v.Get(key) }
 func (v *Viper) Get(key string) interface{} {
 	key = strings.ToLower(key)
-	val := v.find(key)
+	var val interface{}
+	v.buildIndex()
+
+	if val = v.findIndex(key); val == nil {
+		val = v.find(key)
+	}
 
 	if val == nil {
 		return nil
 	}
 
+	val = castVal(val)
+
+	return val
+}
+
+func castVal(val interface{}) interface{} {
 	switch val.(type) {
 	case bool:
 		return cast.ToBool(val)
@@ -339,6 +361,7 @@ func (v *Viper) Get(key string) interface{} {
 	case []string:
 		return val
 	}
+
 	return val
 }
 
@@ -483,7 +506,7 @@ func (v *Viper) BindEnv(input ...string) (err error) {
 		return fmt.Errorf("BindEnv missing key to bind to")
 	}
 
-	key = strings.ToLower(input[0])
+	key = v.envToIndex.Replace(strings.ToLower(input[0]))
 
 	if len(input) == 1 {
 		envkey = v.mergeWithEnvPrefix(key)
@@ -496,6 +519,18 @@ func (v *Viper) BindEnv(input ...string) (err error) {
 	return nil
 }
 
+func (v *Viper) findIndex(key string) interface{} {
+	// Check index - it is safe ot check it first
+	// as the paths there should be materialized
+	// according to their priority
+	val, exists := v.index[key]
+	if exists {
+		jww.TRACE.Println(key, "found in index:", val)
+		return val
+	}
+	return nil
+}
+
 // Given a key, find the value
 // Viper will check in the following order:
 // flag, env, config file, key/value store, default
@@ -507,6 +542,12 @@ func (v *Viper) find(key string) interface{} {
 	// if the requested key is an alias, then return the proper key
 	key = v.realKey(key)
 
+	val, exists = v.override[key]
+	if exists {
+		jww.TRACE.Println(key, "found in override:", val)
+		return val
+	}
+
 	// PFlag Override first
 	flag, exists := v.pflags[key]
 	if exists {
@@ -516,12 +557,6 @@ func (v *Viper) find(key string) interface{} {
 		}
 	}
 
-	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
@@ -563,6 +598,29 @@ func (v *Viper) find(key string) interface{} {
 	return nil
 }
 
+func (v *Viper) buildIndex() {
+	v.index = make(map[string]interface{})
+	v.indexMap(v.AllSettings(), "")
+}
+
+func (v *Viper) indexMap(source map[string]interface{}, prefix string) {
+	if len(prefix) > 0 {
+		prefix = prefix + INDEX_DELIM
+	}
+
+	for key, val := range source {
+
+		indexPath := prefix + key
+
+		v.index[indexPath] = val
+
+		if reflect.TypeOf(val).Kind() == reflect.Map {
+			v.indexMap(cast.ToStringMap(val), indexPath)
+		}
+	}
+
+}
+
 // Check to see if the key has been set in any of the data locations
 func IsSet(key string) bool { return v.IsSet(key) }
 func (v *Viper) IsSet(key string) bool {
@@ -782,12 +840,24 @@ func (v *Viper) AllKeys() []string {
 	return a
 }
 
+func AllIndexes() []string { return v.AllIndexes() }
+func (v *Viper) AllIndexes() []string {
+	v.buildIndex()
+
+	var indexes []string
+	for key, _ := range v.index {
+		indexes = append(indexes, key)
+	}
+
+	return indexes
+}
+
 // Return all settings as a map[string]interface{}
 func AllSettings() map[string]interface{} { return v.AllSettings() }
 func (v *Viper) AllSettings() map[string]interface{} {
 	m := map[string]interface{}{}
 	for _, x := range v.AllKeys() {
-		m[x] = v.Get(x)
+		m[x] = castVal(v.find(x))
 	}
 
 	return m
@@ -879,6 +949,8 @@ func (v *Viper) findConfigFile() (string, error) {
 // purposes.
 func Debug() { v.Debug() }
 func (v *Viper) Debug() {
+	fmt.Println("Index:")
+	pretty.Print(v.index)
 	fmt.Println("Config:")
 	pretty.Println(v.config)
 	fmt.Println("Key/Value Store:")