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package main
import (
"flag"
"fmt"
"math/rand"
"os"
"sync"
"time"
"github.com/pkg/profile"
"github.com/vbauerster/mpb/v8"
"github.com/vbauerster/mpb/v8/decor"
)
const (
totalBars = 42
)
var proftype = flag.String("prof", "", "profile type (cpu, mem)")
func main() {
flag.Parse()
switch *proftype {
case "cpu":
defer profile.Start(profile.CPUProfile, profile.ProfilePath("."), profile.NoShutdownHook).Stop()
case "mem":
defer profile.Start(profile.MemProfile, profile.ProfilePath("."), profile.NoShutdownHook).Stop()
}
var wg sync.WaitGroup
// passed wg will be accounted at p.Wait() call
p := mpb.New(mpb.WithWaitGroup(&wg), mpb.WithDebugOutput(os.Stderr))
wg.Add(totalBars)
for i := 0; i < totalBars; i++ {
name := fmt.Sprintf("Bar#%02d: ", i)
total := rand.Intn(320) + 10
bar := p.AddBar(int64(total),
mpb.PrependDecorators(
decor.Name(name, decor.WCSyncWidthR),
decor.OnComplete(decor.Percentage(decor.WCSyncWidth), "done"),
),
mpb.AppendDecorators(
decor.OnComplete(decor.EwmaETA(decor.ET_STYLE_GO, 30, decor.WCSyncWidth), ""),
decor.EwmaSpeed(decor.SizeB1024(0), "", 30, decor.WCSyncSpace),
),
)
go func() {
defer wg.Done()
rng := rand.New(rand.NewSource(time.Now().UnixNano()))
max := 100 * time.Millisecond
for bar.IsRunning() {
start := time.Now()
time.Sleep(time.Duration(rng.Intn(10)+1) * max / 10)
bar.EwmaIncrement(time.Since(start))
}
}()
}
// wait for passed wg and for all bars to complete and flush
p.Wait()
}
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