func main() {
// Default Brush are available for your convenience. You can invoke
// them directly
fmt.Printf("This is %s\n", brush.Red("red"))
// or you can create new ones!
weird := color.NewBrush(color.PurplePaint, color.CyanPaint)
fmt.Printf("This color is %s\n", weird("weird"))
// Create a Style, which has convenience methods
redBg := color.NewStyle(color.RedPaint, color.YellowPaint)
// Style.WithForeground or WithBackground returns a new Style, with the applied
// Paint. Styles are immutable so the original one is left unchanged
greenFg := redBg.WithForeground(color.GreenPaint)
// Style.Brush gives you a Brush that you can invoke directly to colorize strings.
green := greenFg.Brush()
fmt.Printf("This is %s but not really\n", green("kind of green"))
// You can use it with all sorts of things
sout := log.New(os.Stdout, "["+brush.Green("OK").String()+"]\t", log.LstdFlags)
serr := log.New(os.Stderr, "["+brush.Red("OMG").String()+"]\t", log.LstdFlags)
sout.Printf("Everything was going %s until...", brush.Cyan("fine"))
serr.Printf("%s killed %s !!!", brush.Red("Locke"), brush.Blue("Jacob"))
}
func (l *Logger) write(level Level, format string, a ...interface{}) (n int, err error) {
if level < l.level {
return
}
var levelName string = levels[int(level)]
var sep = " "
var prefix, outstr = l.prefix, ""
if l.flags&Fdatetime != 0 {
now := time.Now()
layout := ""
if l.flags&Fdate != 0 {
layout += "2006/01/02"
}
if l.flags&Ftime != 0 {
layout += " 15:04:05"
}
layout = strings.TrimSpace(layout)
prefix += now.Format(layout)
}
if l.flags&Fshortfile != 0 {
// Retrieve the stack infos
_, file, line, ok := runtime.Caller(2)
if !ok {
file = "<unknown>"
line = -1
} else {
file = file[strings.LastIndex(file, "/")+1:]
}
prefix = fmt.Sprintf("%s %s:%d", prefix, file, line)
}
outstr += levelName
if format == "" {
for _, i := range a {
outstr += sep + fmt.Sprintf("%v", i)
}
} else {
outstr = outstr + sep + fmt.Sprintf(format, a...)
}
if !strings.HasSuffix(outstr, "\n") {
outstr += "\n"
}
if l.colorEnable && l.flags&Fcolor != 0 {
brush := color.NewBrush("", colors[int(level)])
outstr = brush(outstr)
}
mu.Lock()
defer mu.Unlock()
return l.writer.Write([]byte(prefix + sep + outstr))
}
func (y Yellow) String() string {
return color.NewBrush("", color.YellowPaint)(string(y))
}
func (d DarkBlue) String() string {
return color.NewBrush("", color.DarkBluePaint)(string(d))
}
func (p Purple) String() string {
return color.NewBrush("", color.PurplePaint)(string(p))
}
func (r Red) String() string {
return color.NewBrush("", color.RedPaint)(string(r))
}
func (c Cyan) String() string {
return color.NewBrush("", color.CyanPaint)(string(c))
}
func (g Green) String() string {
return color.NewBrush("", color.GreenPaint)(string(g))
}
func (l LightGray) String() string {
return color.NewBrush("", color.LightGrayPaint)(string(l))
}
func (b Blue) String() string {
return color.NewBrush("", color.BluePaint)(string(b))
}
func (w White) String() string {
return color.NewBrush(color.DarkGrayPaint, color.WhitePaint)(string(w))
}
func (b Black) String() string {
return color.NewBrush(color.WhitePaint, color.BlackPaint)(string(b))
}
func (d DarkYellow) String() string {
return color.NewBrush("", color.DarkYellowPaint)(string(d))
}
func (d DarkRed) String() string {
return color.NewBrush("", color.DarkRedPaint)(string(d))
}
func (d DarkGreen) String() string {
return color.NewBrush("", color.DarkGreenPaint)(string(d))
}