Add consul-specific option for config (as registry)

config/source/consul/consul.go

@@ -74,6 +74,11 @@ func NewSource(opts ...source.Option) source.Source {
 	// use default config
 	config := api.DefaultConfig()
 
+	// use the consul config passed in the options if any
+	if co, ok := options.Context.Value(consulConfigKey{}).(*api.Config); ok {
+		config = co
+	}
+
 	// check if there are any addrs
 	a, ok := options.Context.Value(addressKey{}).(string)
 	if ok {

config/source/consul/options.go

@@ -3,6 +3,7 @@ package consul
 import (
 	"context"
 
+	"github.com/hashicorp/consul/api"
 	"github.com/micro/go-micro/config/source"
 )
 
@@ -11,6 +12,7 @@ type prefixKey struct{}
 type stripPrefixKey struct{}
 type dcKey struct{}
 type tokenKey struct{}
+type consulConfigKey struct{}
 
 // WithAddress sets the consul address
 func WithAddress(a string) source.Option {
@@ -61,3 +63,13 @@ func WithToken(p string) source.Option {
 		o.Context = context.WithValue(o.Context, tokenKey{}, p)
 	}
 }
+
+// WithConsulConfig set consul-specific options
+func WithConsulConfig(c *api.Config) source.Option {
+	return func(o *source.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, consulConfigKey{}, c)
+	}
+}