minio/pkg/color/color.go

package color

import (
	"fmt"
	"os"

	"github.com/fatih/color"
	"github.com/mattn/go-isatty"
)

// global colors.
var (
	// Check if we stderr, stdout are dumb terminals, we do not apply
	// ansi coloring on dumb terminals.
	IsTerminal = func() bool {
		return isatty.IsTerminal(os.Stdout.Fd()) && isatty.IsTerminal(os.Stderr.Fd())
	}

	Bold = func() func(a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.Bold).SprintFunc()
		}
		return fmt.Sprint
	}()
	Red = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgRed).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	Blue = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgBlue).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	Yellow = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgYellow).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	CyanBold = func() func(a ...interface{}) string {
		if IsTerminal() {
			color.New(color.FgCyan, color.Bold).SprintFunc()
		}
		return fmt.Sprint
	}()
	YellowBold = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgYellow, color.Bold).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	BgYellow = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.BgYellow).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	Black = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgBlack).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	FgRed = func() func(a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgRed).SprintFunc()
		}
		return fmt.Sprint
	}()
	BgRed = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.BgRed).SprintfFunc()
		}
		return fmt.Sprintf
	}()
	FgWhite = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgWhite).SprintfFunc()
		}
		return fmt.Sprintf
	}()
)