Use goreleaser to build and release (#244)

Instead of using gox on one side and an action to release, we can merge
them together with goreleaser which will build for extra targets (arm,
mips if needed in the future) and it also takes care of creating
checksums, a source archive, and a changelog and creating a release with
all the artifacts.

All binaries should respect the old naming convention, so any scripts
out there should still work.

Signed-off-by: Itxaka <igarcia@suse.com>

vendor/google.golang.org/grpc/encoding/proto/proto.go

@@ -21,8 +21,7 @@
 package proto
 
 import (
-	"math"
-	"sync"
+	"fmt"
 
 	"github.com/golang/protobuf/proto"
 	"google.golang.org/grpc/encoding"
@@ -38,73 +37,22 @@ func init() {
 // codec is a Codec implementation with protobuf. It is the default codec for gRPC.
 type codec struct{}
 
-type cachedProtoBuffer struct {
-	lastMarshaledSize uint32
-	proto.Buffer
-}
-
-func capToMaxInt32(val int) uint32 {
-	if val > math.MaxInt32 {
-		return uint32(math.MaxInt32)
-	}
-	return uint32(val)
-}
-
-func marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
-	protoMsg := v.(proto.Message)
-	newSlice := make([]byte, 0, cb.lastMarshaledSize)
-
-	cb.SetBuf(newSlice)
-	cb.Reset()
-	if err := cb.Marshal(protoMsg); err != nil {
-		return nil, err
-	}
-	out := cb.Bytes()
-	cb.lastMarshaledSize = capToMaxInt32(len(out))
-	return out, nil
-}
-
 func (codec) Marshal(v interface{}) ([]byte, error) {
-	if pm, ok := v.(proto.Marshaler); ok {
-		// object can marshal itself, no need for buffer
-		return pm.Marshal()
+	vv, ok := v.(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to marshal, message is %T, want proto.Message", v)
 	}
-
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	out, err := marshal(v, cb)
-
-	// put back buffer and lose the ref to the slice
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return out, err
+	return proto.Marshal(vv)
 }
 
 func (codec) Unmarshal(data []byte, v interface{}) error {
-	protoMsg := v.(proto.Message)
-	protoMsg.Reset()
-
-	if pu, ok := protoMsg.(proto.Unmarshaler); ok {
-		// object can unmarshal itself, no need for buffer
-		return pu.Unmarshal(data)
+	vv, ok := v.(proto.Message)
+	if !ok {
+		return fmt.Errorf("failed to unmarshal, message is %T, want proto.Message", v)
 	}
-
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	cb.SetBuf(data)
-	err := cb.Unmarshal(protoMsg)
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return err
+	return proto.Unmarshal(data, vv)
 }
 
 func (codec) Name() string {
 	return Name
 }
-
-var protoBufferPool = &sync.Pool{
-	New: func() interface{} {
-		return &cachedProtoBuffer{
-			Buffer:            proto.Buffer{},
-			lastMarshaledSize: 16,
-		}
-	},
-}