add config

config/reader/options.go

@@ -0,0 +1,42 @@
+package reader
+
+import (
+	"github.com/micro/go-micro/config/encoder"
+	"github.com/micro/go-micro/config/encoder/hcl"
+	"github.com/micro/go-micro/config/encoder/json"
+	"github.com/micro/go-micro/config/encoder/toml"
+	"github.com/micro/go-micro/config/encoder/xml"
+	"github.com/micro/go-micro/config/encoder/yaml"
+)
+
+type Options struct {
+	Encoding map[string]encoder.Encoder
+}
+
+type Option func(o *Options)
+
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Encoding: map[string]encoder.Encoder{
+			"json": json.NewEncoder(),
+			"yaml": yaml.NewEncoder(),
+			"toml": toml.NewEncoder(),
+			"xml":  xml.NewEncoder(),
+			"hcl":  hcl.NewEncoder(),
+			"yml":  yaml.NewEncoder(),
+		},
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
+func WithEncoder(e encoder.Encoder) Option {
+	return func(o *Options) {
+		if o.Encoding == nil {
+			o.Encoding = make(map[string]encoder.Encoder)
+		}
+		o.Encoding[e.String()] = e
+	}
+}