config: remove default config (#1882)

Co-authored-by: Asim Aslam <asim@aslam.me>

config/config.go

@@ -7,7 +7,6 @@ import (
 	"github.com/micro/go-micro/v3/config/loader"
 	"github.com/micro/go-micro/v3/config/reader"
 	"github.com/micro/go-micro/v3/config/source"
-	"github.com/micro/go-micro/v3/config/source/file"
 )
 
 // Config is an interface abstraction for dynamic configuration
@@ -45,54 +44,7 @@ type Options struct {
 
 type Option func(o *Options)
 
-var (
-	// Default Config Manager
-	DefaultConfig, _ = NewConfig()
-)
-
 // NewConfig returns new config
 func NewConfig(opts ...Option) (Config, error) {
 	return newConfig(opts...)
 }
-
-// Return config as raw json
-func Bytes() []byte {
-	return DefaultConfig.Bytes()
-}
-
-// Return config as a map
-func Map() map[string]interface{} {
-	return DefaultConfig.Map()
-}
-
-// Scan values to a go type
-func Scan(v interface{}) error {
-	return DefaultConfig.Scan(v)
-}
-
-// Force a source changeset sync
-func Sync() error {
-	return DefaultConfig.Sync()
-}
-
-// Get a value from the config
-func Get(path ...string) reader.Value {
-	return DefaultConfig.Get(path...)
-}
-
-// Load config sources
-func Load(source ...source.Source) error {
-	return DefaultConfig.Load(source...)
-}
-
-// Watch a value for changes
-func Watch(path ...string) (Watcher, error) {
-	return DefaultConfig.Watch(path...)
-}
-
-// LoadFile is short hand for creating a file source and loading it
-func LoadFile(path string) error {
-	return Load(file.NewSource(
-		file.WithPath(path),
-	))
-}

config/default.go

@@ -33,9 +33,11 @@ type watcher struct {
 func newConfig(opts ...Option) (Config, error) {
 	var c config
 
-	c.Init(opts...)
-	go c.run()
+	if err := c.Init(opts...); err != nil {
+		return nil, err
+	}
 
+	go c.run()
 	return &c, nil
 }