Remove the closer package since it's trivial

The only uses found were the Consul mock kv client. Even in
Cortex/Loki/Tempo the only uses were the vendored version of
the same Consul mock kv client.

Fixes #51

Signed-off-by: Nick Pillitteri <nick.pillitteri@grafana.com>

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## Changelog
 
+* [CHANGE] Closer: remove the closer package since it's trivial to just copy/paste. #70
 * [CHANGE] Memberlist: allow specifying address and port advertised to the memberlist cluster members by setting the following configuration: #37
   * `-memberlist.advertise_addr`
   * `-memberlist.advertise_port`

kv/consul/client.go

@@ -59,7 +59,7 @@ type kv interface {
 	Put(p *consul.KVPair, q *consul.WriteOptions) (*consul.WriteMeta, error)
 }
 
-// Client is a KV.Client for Consul.
+// Client is a kv.Client for Consul.
 type Client struct {
 	kv
 	codec         codec.Codec

kv/consul/mock.go

@@ -12,7 +12,6 @@ import (
 	consul "github.com/hashicorp/consul/api"
 	"github.com/prometheus/client_golang/prometheus"
 
-	"github.com/grafana/dskit/closer"
 	"github.com/grafana/dskit/kv/codec"
 )
 
@@ -48,7 +47,7 @@ func NewInMemoryClientWithConfig(codec codec.Codec, cfg Config, logger log.Logge
 	// Create a closer function used to close the main loop and wait until it's done.
 	// We need to wait until done, otherwise the goroutine leak finder used in tests
 	// may still report it as leaked.
-	closer := closer.Func(func() error {
+	closer := closerFunc(func() error {
 		close(m.close)
 		m.closeWG.Wait()
 		return nil
@@ -67,6 +66,12 @@ func NewInMemoryClientWithConfig(codec codec.Codec, cfg Config, logger log.Logge
 	}, closer
 }
 
+type closerFunc func() error
+
+func (c closerFunc) Close() error {
+	return c()
+}
+
 func copyKVPair(in *consul.KVPair) *consul.KVPair {
 	out := *in
 	out.Value = make([]byte, len(in.Value))

kv/etcd/etcd.go

@@ -38,7 +38,7 @@ type Clientv3Facade interface {
 	clientv3.Watcher
 }
 
-// Client implements ring.KVClient for etcd.
+// Client implements kv.Client for etcd.
 type Client struct {
 	cfg    Config
 	codec  codec.Codec