update vendor/

vendor/github.com/spf13/viper/viper.go

@@ -3,7 +3,7 @@
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file.
 
-// Viper is a application configuration system.
+// Viper is an application configuration system.
 // It believes that applications can be configured a variety of ways
 // via flags, ENVIRONMENT variables, configuration files retrieved
 // from the file system, or a remote key/value store.
@@ -45,6 +45,7 @@ import (
 	"github.com/spf13/cast"
 	jww "github.com/spf13/jwalterweatherman"
 	"github.com/spf13/pflag"
+	"github.com/subosito/gotenv"
 )
 
 // ConfigMarshalError happens when failing to marshal the configuration.
@@ -225,12 +226,12 @@ func New() *Viper {
 	return v
 }
 
-// Intended for testing, will reset all to default settings.
+// Reset is intended for testing, will reset all to default settings.
 // In the public interface for the viper package so applications
 // can use it in their testing as well.
 func Reset() {
 	v = New()
-	SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl"}
+	SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env"}
 	SupportedRemoteProviders = []string{"etcd", "consul"}
 }
 
@@ -269,7 +270,7 @@ type RemoteProvider interface {
 }
 
 // SupportedExts are universally supported extensions.
-var SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl"}
+var SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env"}
 
 // SupportedRemoteProviders are universally supported remote providers.
 var SupportedRemoteProviders = []string{"etcd", "consul"}
@@ -294,6 +295,7 @@ func (v *Viper) WatchConfig() {
 		filename, err := v.getConfigFile()
 		if err != nil {
 			log.Printf("error: %v\n", err)
+			initWG.Done()
 			return
 		}
 
@@ -343,7 +345,7 @@ func (v *Viper) WatchConfig() {
 			}
 		}()
 		watcher.Add(configDir)
-		initWG.Done()   // done initalizing the watch in this go routine, so the parent routine can move on...
+		initWG.Done()   // done initializing the watch in this go routine, so the parent routine can move on...
 		eventsWG.Wait() // now, wait for event loop to end in this go-routine...
 	}()
 	initWG.Wait() // make sure that the go routine above fully ended before returning
@@ -705,6 +707,8 @@ func (v *Viper) Get(key string) interface{} {
 			return cast.ToDuration(val)
 		case []string:
 			return cast.ToStringSlice(val)
+		case []int:
+			return cast.ToIntSlice(val)
 		}
 	}
 
@@ -794,6 +798,12 @@ func (v *Viper) GetDuration(key string) time.Duration {
 	return cast.ToDuration(v.Get(key))
 }
 
+// GetIntSlice returns the value associated with the key as a slice of int values.
+func GetIntSlice(key string) []int { return v.GetIntSlice(key) }
+func (v *Viper) GetIntSlice(key string) []int {
+	return cast.ToIntSlice(v.Get(key))
+}
+
 // GetStringSlice returns the value associated with the key as a slice of strings.
 func GetStringSlice(key string) []string { return v.GetStringSlice(key) }
 func (v *Viper) GetStringSlice(key string) []string {
@@ -1012,6 +1022,11 @@ func (v *Viper) find(lcaseKey string) interface{} {
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)
 			return res
+		case "intSlice":
+			s := strings.TrimPrefix(flag.ValueString(), "[")
+			s = strings.TrimSuffix(s, "]")
+			res, _ := readAsCSV(s)
+			return cast.ToIntSlice(res)
 		default:
 			return flag.ValueString()
 		}
@@ -1081,6 +1096,11 @@ func (v *Viper) find(lcaseKey string) interface{} {
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)
 			return res
+		case "intSlice":
+			s := strings.TrimPrefix(flag.ValueString(), "[")
+			s = strings.TrimSuffix(s, "]")
+			res, _ := readAsCSV(s)
+			return cast.ToIntSlice(res)
 		default:
 			return flag.ValueString()
 		}
@@ -1123,8 +1143,8 @@ func (v *Viper) SetEnvKeyReplacer(r *strings.Replacer) {
 	v.envKeyReplacer = r
 }
 
-// Aliases provide another accessor for the same key.
-// This enables one to change a name without breaking the application
+// RegisterAlias creates an alias that provides another accessor for the same key.
+// This enables one to change a name without breaking the application.
 func RegisterAlias(alias string, key string) { v.RegisterAlias(alias, key) }
 func (v *Viper) RegisterAlias(alias string, key string) {
 	v.registerAlias(alias, strings.ToLower(key))
@@ -1344,21 +1364,21 @@ func (v *Viper) writeConfig(filename string, force bool) error {
 	if v.config == nil {
 		v.config = make(map[string]interface{})
 	}
-	var flags int
-	if force == true {
-		flags = os.O_CREATE | os.O_TRUNC | os.O_WRONLY
-	} else {
-		if _, err := os.Stat(filename); os.IsNotExist(err) {
-			flags = os.O_WRONLY
-		} else {
-			return fmt.Errorf("File: %s exists. Use WriteConfig to overwrite.", filename)
-		}
+	flags := os.O_CREATE | os.O_TRUNC | os.O_WRONLY
+	if !force {
+		flags |= os.O_EXCL
 	}
 	f, err := v.fs.OpenFile(filename, flags, v.configPermissions)
 	if err != nil {
 		return err
 	}
-	return v.marshalWriter(f, configType)
+	defer f.Close()
+
+	if err := v.marshalWriter(f, configType); err != nil {
+		return err
+	}
+
+	return f.Sync()
 }
 
 // Unmarshal a Reader into a map.
@@ -1382,7 +1402,7 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 		}
 
 	case "hcl":
-		obj, err := hcl.Parse(string(buf.Bytes()))
+		obj, err := hcl.Parse(buf.String())
 		if err != nil {
 			return ConfigParseError{err}
 		}
@@ -1400,6 +1420,15 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 			c[k] = v
 		}
 
+	case "dotenv", "env":
+		env, err := gotenv.StrictParse(buf)
+		if err != nil {
+			return ConfigParseError{err}
+		}
+		for k, v := range env {
+			c[k] = v
+		}
+
 	case "properties", "props", "prop":
 		v.properties = properties.NewProperties()
 		var err error
@@ -1440,6 +1469,9 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 
 	case "hcl":
 		b, err := json.Marshal(c)
+		if err != nil {
+			return ConfigMarshalError{err}
+		}
 		ast, err := hcl.Parse(string(b))
 		if err != nil {
 			return ConfigMarshalError{err}
@@ -1465,6 +1497,18 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 			return ConfigMarshalError{err}
 		}
 
+	case "dotenv", "env":
+		lines := []string{}
+		for _, key := range v.AllKeys() {
+			envName := strings.ToUpper(strings.Replace(key, ".", "_", -1))
+			val := v.Get(key)
+			lines = append(lines, fmt.Sprintf("%v=%v", envName, val))
+		}
+		s := strings.Join(lines, "\n")
+		if _, err := f.WriteString(s); err != nil {
+			return ConfigMarshalError{err}
+		}
+
 	case "toml":
 		t, err := toml.TreeFromMap(c)
 		if err != nil {
@@ -1679,7 +1723,7 @@ func (v *Viper) AllKeys() []string {
 	m = v.flattenAndMergeMap(m, v.defaults, "")
 
 	// convert set of paths to list
-	a := []string{}
+	a := make([]string, 0, len(m))
 	for x := range m {
 		a = append(a, x)
 	}
@@ -1728,7 +1772,7 @@ func (v *Viper) flattenAndMergeMap(shadow map[string]bool, m map[string]interfac
 func (v *Viper) mergeFlatMap(shadow map[string]bool, m map[string]interface{}) map[string]bool {
 	// scan keys
 outer:
-	for k, _ := range m {
+	for k := range m {
 		path := strings.Split(k, v.keyDelim)
 		// scan intermediate paths
 		var parentKey string