platform: Add group interface

log/default.go

@@ -24,8 +24,9 @@ func NewFactory(formatter Formatter, writer io.Writer, platformWriter io.Writer)
 	return &simpleFactory{
 		formatter: formatter,
 		platformFormatter: Formatter{
-			BaseTime:      formatter.BaseTime,
-			DisableColors: C.IsDarwin || C.IsIos,
+			BaseTime:         formatter.BaseTime,
+			DisableColors:    C.IsDarwin || C.IsIos,
+			DisableLineBreak: true,
 		},
 		writer:         writer,
 		platformWriter: platformWriter,

log/format.go

@@ -17,6 +17,7 @@ type Formatter struct {
 	DisableTimestamp bool
 	FullTimestamp    bool
 	TimestampFormat  string
+	DisableLineBreak bool
 }
 
 func (f Formatter) Format(ctx context.Context, level Level, tag string, message string, timestamp time.Time) string {
@@ -76,8 +77,14 @@ func (f Formatter) Format(ctx context.Context, level Level, tag string, message
 	default:
 		message = levelString + "[" + xd(int(timestamp.Sub(f.BaseTime)/time.Second), 4) + "] " + message
 	}
-	if message[len(message)-1] != '\n' {
-		message += "\n"
+	if f.DisableLineBreak {
+		if message[len(message)-1] != '\n' {
+			message = message[:len(message)-1]
+		}
+	} else {
+		if message[len(message)-1] != '\n' {
+			message += "\n"
+		}
 	}
 	return message
 }

log/observable.go

@@ -28,8 +28,9 @@ func NewObservableFactory(formatter Formatter, writer io.Writer, platformWriter
 	factory := &observableFactory{
 		formatter: formatter,
 		platformFormatter: Formatter{
-			BaseTime:      formatter.BaseTime,
-			DisableColors: C.IsDarwin || C.IsIos,
+			BaseTime:         formatter.BaseTime,
+			DisableColors:    C.IsDarwin || C.IsIos,
+			DisableLineBreak: true,
 		},
 		writer:         writer,
 		platformWriter: platformWriter,