Add ability to read client options

cluster.go

@@ -372,6 +372,11 @@ func NewClusterClient(opt *ClusterOptions) *ClusterClient {
 	return c
 }
 
+// Options returns read-only Options that were used to create the client.
+func (c *ClusterClient) Options() *ClusterOptions {
+	return c.opt
+}
+
 func (c *ClusterClient) state() *clusterState {
 	v := c._state.Load()
 	if v != nil {

redis.go

@@ -21,6 +21,11 @@ func (c *baseClient) String() string {
 	return fmt.Sprintf("Redis<%s db:%d>", c.getAddr(), c.opt.DB)
 }
 
+// Options returns read-only Options that were used to create the client.
+func (c *baseClient) Options() *Options {
+	return c.opt
+}
+
 func (c *baseClient) conn() (*pool.Conn, bool, error) {
 	cn, isNew, err := c.connPool.Get()
 	if err != nil {

ring.go

@@ -158,6 +158,11 @@ func NewRing(opt *RingOptions) *Ring {
 	return ring
 }
 
+// Options returns read-only Options that were used to create the client.
+func (c *Ring) Options() *RingOptions {
+	return c.opt
+}
+
 // PoolStats returns accumulated connection pool stats.
 func (c *Ring) PoolStats() *PoolStats {
 	var acc PoolStats