stderr output support

core.go

@@ -80,12 +80,23 @@ func (logger *starlog) build(thread string, isStd bool, isShow bool, handler fun
 	}
 	if isShow {
 		if !logger.showColor {
-			fmt.Print(logStr)
+			if level >= logger.errOutputLevel {
+				fmt.Fprint(os.Stderr, logStr)
+			} else {
+				fmt.Print(logStr)
+			}
 		} else if !logger.onlyColorLevel {
-			//logcolor := NewColor(logger.colorList[level]...)
-			logger.colorMe[level].Fprint(stdScreen, logStr)
+			if level < logger.errOutputLevel {
+				logger.colorMe[level].Fprint(stdScreen, logStr)
+			} else {
+				logger.colorMe[level].Fprint(errScreen, logStr)
+			}
 		} else {
-			fmt.Fprint(stdScreen, logStr)
+			if level < logger.errOutputLevel {
+				fmt.Fprint(stdScreen, logStr)
+			} else {
+				fmt.Fprint(errScreen, logStr)
+			}
 		}
 	}
 	if handler != nil {

typed.go

@@ -38,11 +38,13 @@ var (
 	stackStopChan chan int
 	stackMu       sync.Mutex
 	stdScreen     io.Writer = colorable.NewColorableStdout()
+	errScreen     io.Writer = colorable.NewColorableStderr()
 )
 
 type starlog struct {
 	mu             *sync.Mutex
 	output         io.Writer
+	errOutputLevel int
 	showFuncName   bool
 	showThread     bool
 	showLevel      bool
@@ -80,6 +82,7 @@ func newLogCore(out io.Writer) *starlog {
 	return &starlog{
 		mu:             &sync.Mutex{},
 		output:         out,
+		errOutputLevel: LvError,
 		showFuncName:   true,
 		showThread:     true,
 		showLevel:      true,
@@ -121,6 +124,18 @@ func NewStarlog(out io.Writer) *StarLogger {
 	}
 }
 
+func (logger *StarLogger) StdErrLevel() int {
+	logger.logcore.mu.Lock()
+	defer logger.logcore.mu.Unlock()
+	return logger.logcore.errOutputLevel
+}
+
+func (logger *StarLogger) SetStdErrLevel(level int) {
+	logger.logcore.mu.Lock()
+	defer logger.logcore.mu.Unlock()
+	logger.logcore.errOutputLevel = level
+}
+
 func (logger *StarLogger) NewFlag() *StarLogger {
 	return &StarLogger{
 		thread:      getRandomFlag(false),