refactor(writers): 采用 io.MultiWriter 代替 New 自有的实现

handler.go

@@ -11,8 +11,6 @@ import (
 	"sync"
 
 	"github.com/issue9/term/v3/colors"
-
-	"github.com/issue9/logs/v6/writers"
 )
 
 var nop = &nopHandler{}
@@ -48,7 +46,11 @@ func (w HandlerFunc) Handle(e *Record) { w(e) }
 //
 // NOTE: 如果向 w 输出内容时出错，会将错误信息输出到终端作为最后的处理方式。
 func NewTextHandler(w ...io.Writer) Handler {
-	ww := writers.New(w...)
+	if len(w) == 0 {
+		return nop
+	}
+
+	ww := io.MultiWriter(w...)
 	mux := &sync.Mutex{} // 防止多个函数同时调用 HandlerFunc 方法。
 
 	return HandlerFunc(func(e *Record) {
@@ -124,7 +126,11 @@ func NewTextHandler(w ...io.Writer) Handler {
 //
 // NOTE: 如果向 w 输出内容时出错，会将错误信息输出到终端作为最后的处理方式。
 func NewJSONHandler(w ...io.Writer) Handler {
-	ww := writers.New(w...)
+	if len(w) == 0 {
+		return nop
+	}
+
+	ww := io.MultiWriter(w...)
 	mux := &sync.Mutex{}
 
 	return HandlerFunc(func(e *Record) {

handler_test.go

@@ -59,9 +59,7 @@ func TestTextHandler(t *testing.T) {
 	e.AppendCreated = func(b *Buffer) { b.AppendTime(now, l.createdFormat) }
 	e.With("m1", marshalObject("m1"))
 
-	a.PanicString(func() {
-		NewTextHandler()
-	}, "参数 w 不能为空")
+	a.Equal(NewTextHandler(), nop)
 
 	buf := new(bytes.Buffer)
 	l.SetHandler(NewTextHandler(buf))
@@ -96,9 +94,7 @@ func TestJSONFormat(t *testing.T) {
 	e.AppendCreated = func(b *Buffer) { b.AppendTime(now, l.createdFormat) }
 	e.With("m1", marshalObject("m1"))
 
-	a.PanicString(func() {
-		NewJSONHandler()
-	}, "参数 w 不能为空")
+	a.Equal(NewJSONHandler(), nop)
 
 	buf := new(bytes.Buffer)
 	l.SetHandler(NewJSONHandler(buf))

writers/writers.go

@@ -5,31 +5,11 @@ package writers
 
 import "io"
 
-type (
-	ws []io.Writer
-
-	WriteFunc func([]byte) (int, error)
-)
+type WriteFunc func([]byte) (int, error)
 
 func (f WriteFunc) Write(data []byte) (int, error) { return f(data) }
 
-func (w ws) Write(data []byte) (n int, err error) {
-	for _, writer := range w {
-		if n, err = writer.Write(data); err != nil {
-			return n, err
-		}
-	}
-	return n, err
-}
-
 // New 将 [1,n] 个 [io.Writer] 合并成一个
-func New(w ...io.Writer) io.Writer {
-	switch len(w) {
-	case 0:
-		panic("参数 w 不能为空")
-	case 1:
-		return w[0]
-	default:
-		return ws(w)
-	}
-}
+//
+// Deprecated: 请使用 [io.MultiWriter] 代替
+func New(w ...io.Writer) io.Writer { return io.MultiWriter(w...) }