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/protobuf/internal/impl/codec_message.go

@@ -11,7 +11,7 @@ import (
 
 	"google.golang.org/protobuf/encoding/protowire"
 	"google.golang.org/protobuf/internal/encoding/messageset"
-	"google.golang.org/protobuf/internal/fieldsort"
+	"google.golang.org/protobuf/internal/order"
 	pref "google.golang.org/protobuf/reflect/protoreflect"
 	piface "google.golang.org/protobuf/runtime/protoiface"
 )
@@ -27,6 +27,7 @@ type coderMessageInfo struct {
 	coderFields        map[protowire.Number]*coderFieldInfo
 	sizecacheOffset    offset
 	unknownOffset      offset
+	unknownPtrKind     bool
 	extensionOffset    offset
 	needsInitCheck     bool
 	isMessageSet       bool
@@ -47,9 +48,20 @@ type coderFieldInfo struct {
 }
 
 func (mi *MessageInfo) makeCoderMethods(t reflect.Type, si structInfo) {
-	mi.sizecacheOffset = si.sizecacheOffset
-	mi.unknownOffset = si.unknownOffset
-	mi.extensionOffset = si.extensionOffset
+	mi.sizecacheOffset = invalidOffset
+	mi.unknownOffset = invalidOffset
+	mi.extensionOffset = invalidOffset
+
+	if si.sizecacheOffset.IsValid() && si.sizecacheType == sizecacheType {
+		mi.sizecacheOffset = si.sizecacheOffset
+	}
+	if si.unknownOffset.IsValid() && (si.unknownType == unknownFieldsAType || si.unknownType == unknownFieldsBType) {
+		mi.unknownOffset = si.unknownOffset
+		mi.unknownPtrKind = si.unknownType.Kind() == reflect.Ptr
+	}
+	if si.extensionOffset.IsValid() && si.extensionType == extensionFieldsType {
+		mi.extensionOffset = si.extensionOffset
+	}
 
 	mi.coderFields = make(map[protowire.Number]*coderFieldInfo)
 	fields := mi.Desc.Fields()
@@ -73,6 +85,27 @@ func (mi *MessageInfo) makeCoderMethods(t reflect.Type, si structInfo) {
 		var funcs pointerCoderFuncs
 		var childMessage *MessageInfo
 		switch {
+		case ft == nil:
+			// This never occurs for generated message types.
+			// It implies that a hand-crafted type has missing Go fields
+			// for specific protobuf message fields.
+			funcs = pointerCoderFuncs{
+				size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int {
+					return 0
+				},
+				marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) {
+					return nil, nil
+				},
+				unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) {
+					panic("missing Go struct field for " + string(fd.FullName()))
+				},
+				isInit: func(p pointer, f *coderFieldInfo) error {
+					panic("missing Go struct field for " + string(fd.FullName()))
+				},
+				merge: func(dst, src pointer, f *coderFieldInfo, opts mergeOptions) {
+					panic("missing Go struct field for " + string(fd.FullName()))
+				},
+			}
 		case isOneof:
 			fieldOffset = offsetOf(fs, mi.Exporter)
 		case fd.IsWeak():
@@ -136,7 +169,7 @@ func (mi *MessageInfo) makeCoderMethods(t reflect.Type, si structInfo) {
 		sort.Slice(mi.orderedCoderFields, func(i, j int) bool {
 			fi := fields.ByNumber(mi.orderedCoderFields[i].num)
 			fj := fields.ByNumber(mi.orderedCoderFields[j].num)
-			return fieldsort.Less(fi, fj)
+			return order.LegacyFieldOrder(fi, fj)
 		})
 	}
 
@@ -157,3 +190,28 @@ func (mi *MessageInfo) makeCoderMethods(t reflect.Type, si structInfo) {
 		mi.methods.Merge = mi.merge
 	}
 }
+
+// getUnknownBytes returns a *[]byte for the unknown fields.
+// It is the caller's responsibility to check whether the pointer is nil.
+// This function is specially designed to be inlineable.
+func (mi *MessageInfo) getUnknownBytes(p pointer) *[]byte {
+	if mi.unknownPtrKind {
+		return *p.Apply(mi.unknownOffset).BytesPtr()
+	} else {
+		return p.Apply(mi.unknownOffset).Bytes()
+	}
+}
+
+// mutableUnknownBytes returns a *[]byte for the unknown fields.
+// The returned pointer is guaranteed to not be nil.
+func (mi *MessageInfo) mutableUnknownBytes(p pointer) *[]byte {
+	if mi.unknownPtrKind {
+		bp := p.Apply(mi.unknownOffset).BytesPtr()
+		if *bp == nil {
+			*bp = new([]byte)
+		}
+		return *bp
+	} else {
+		return p.Apply(mi.unknownOffset).Bytes()
+	}
+}