vendor: github.com/nsf/termbox-go and dependencies for rclone ncdu

vendor/github.com/nsf/termbox-go/_demos/random_output.go

@@ -0,0 +1,46 @@
+package main
+
+import "github.com/nsf/termbox-go"
+import "math/rand"
+import "time"
+
+func draw() {
+	w, h := termbox.Size()
+	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
+	for y := 0; y < h; y++ {
+		for x := 0; x < w; x++ {
+			termbox.SetCell(x, y, ' ', termbox.ColorDefault,
+				termbox.Attribute(rand.Int()%8)+1)
+		}
+	}
+	termbox.Flush()
+}
+
+func main() {
+	err := termbox.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termbox.Close()
+
+	event_queue := make(chan termbox.Event)
+	go func() {
+		for {
+			event_queue <- termbox.PollEvent()
+		}
+	}()
+
+	draw()
+loop:
+	for {
+		select {
+		case ev := <-event_queue:
+			if ev.Type == termbox.EventKey && ev.Key == termbox.KeyEsc {
+				break loop
+			}
+		default:
+			draw()
+			time.Sleep(10 * time.Millisecond)
+		}
+	}
+}