add config

config/reader/reader.go

@@ -0,0 +1,36 @@
+// Package reader parses change sets and provides config values
+package reader
+
+import (
+	"time"
+
+	"github.com/micro/go-micro/config/source"
+)
+
+// Reader is an interface for merging changesets
+type Reader interface {
+	Merge(...*source.ChangeSet) (*source.ChangeSet, error)
+	Values(*source.ChangeSet) (Values, error)
+	String() string
+}
+
+// Values is returned by the reader
+type Values interface {
+	Bytes() []byte
+	Get(path ...string) Value
+	Map() map[string]interface{}
+	Scan(v interface{}) error
+}
+
+// Value represents a value of any type
+type Value interface {
+	Bool(def bool) bool
+	Int(def int) int
+	String(def string) string
+	Float64(def float64) float64
+	Duration(def time.Duration) time.Duration
+	StringSlice(def []string) []string
+	StringMap(def map[string]string) map[string]string
+	Scan(val interface{}) error
+	Bytes() []byte
+}