colorful console only the terminal supports

logs/console.go

@@ -47,17 +47,17 @@ var colors = []brush{
 
 // consoleWriter implements LoggerInterface and writes messages to terminal.
 type consoleWriter struct {
-	lg    *log.Logger
-	Level int  `json:"level"`
-	Color bool `json:"color"`
+	lg       *log.Logger
+	Level    int  `json:"level"`
+	Colorful bool `json:"color"` //this filed is useful only when system's terminal supports color
 }
 
 // NewConsole create ConsoleWriter returning as LoggerInterface.
 func NewConsole() Logger {
 	cw := &consoleWriter{
-		lg:    log.New(os.Stdout, "", 0),
-		Level: LevelDebug,
-		Color: true,
+		lg:       log.New(os.Stdout, "", 0),
+		Level:    LevelDebug,
+		Colorful: true,
 	}
 	return cw
 }
@@ -68,7 +68,11 @@ func (c *consoleWriter) Init(jsonConfig string) error {
 	if len(jsonConfig) == 0 {
 		return nil
 	}
-	return json.Unmarshal([]byte(jsonConfig), c)
+	err := json.Unmarshal([]byte(jsonConfig), c)
+	if runtime.GOOS == "windows" {
+		c.Colorful = false
+	}
+	return err
 }
 
 // WriteMsg write message in console.
@@ -77,12 +81,11 @@ func (c *consoleWriter) WriteMsg(when time.Time, msg string, level int) error {
 		return nil
 	}
 	msg = formatLogTime(when) + msg
-	if runtime.GOOS == "windows" || !c.Color {
+	if c.Colorful {
+		c.lg.Println(colors[level](msg))
+	} else {
 		c.lg.Println(msg)
-		return nil
 	}
-	c.lg.Println(colors[level](msg))
-
 	return nil
 }