reproduce_ui_live_issue.go

package main

import (
	"fmt"
	"io"
	"os"
	"sync"
	"time"

	"github.com/fatih/color"
	"github.com/gosuri/uilive"
)

func main() {
	uilive.Out = os.Stderr
	uilive.RefreshInterval = 10 * time.Hour
	color.NoColor = false
	var (
		lwMu sync.Mutex
		lw   = uilive.New()
	)
	lw.Start()
	defer lw.Stop()

	// foobar
	lwMu.Lock()
	defer lwMu.Unlock()

	spinner := []rune{'⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏'}
	spinnerI := 0
	start := time.Now()
	names := []string{
		"github.com/sourcegraph/foobar1",
		"github.com/sourcegraph/foobar2",
		"github.com/sourcegraph/foobar3",
		"github.com/sourcegraph/foobar4",
		"github.com/sourcegraph/foobar5",
		"github.com/sourcegraph/foobar6",
	}

	for i := 0; i < 100; i++ {
		spinnerRune := spinner[spinnerI%len(spinner)]
		spinnerI++

		statusColor := color.GreenString
		timerDuration := time.Since(start)

		for j, n := range names {
			var w io.Writer
			if j == 0 {
				w = lw
			} else {
				w = lw.Newline()
			}

			fmt.Fprintf(w, "%s %s %s %s",
				statusColor(fmt.Sprintf("%-*s", len(n), n)),
				color.HiBlackString("|"),
				statusColor(string(spinnerRune)),
				"/var/logs/this-is-really-long-and-should-bust-the-display",
			)

			fmt.Fprintf(w, color.HiBlackString(" %s"), timerDuration.Round(time.Second))

			fmt.Fprintln(w)
		}

		_ = lw.Flush()

		time.Sleep(50 * time.Millisecond)
	}
}