Multi Progress Bar

Features

Usage

Rendering single bar

package main
import (
 "math/rand"
 "time"
 "github.com/vbauerster/mpb/v8"
 "github.com/vbauerster/mpb/v8/decor"
)
func main() {
 // initialize progress container, with custom width
 p := mpb.New(mpb.WithWidth(64))
 total := 100
 name := "Single Bar:"
 // create a single bar, which will inherit container's width
 bar := p.New(int64(total),
 // BarFillerBuilder with custom style
 mpb.BarStyle().Lbound("╢").Filler("▌").Tip("▌").Padding("░").Rbound("╟"),
 mpb.PrependDecorators(
 // display our name with one space on the right
 decor.Name(name, decor.WC{C: decor.DindentRight | decor.DextraSpace}),
 // replace ETA decorator with "done" message, OnComplete event
 decor.OnComplete(decor.AverageETA(decor.ET_STYLE_GO), "done"),
 ),
 mpb.AppendDecorators(decor.Percentage()),
 )
 // simulating some work
 max := 100 * time.Millisecond
 for i := 0; i < total; i++ {
 time.Sleep(time.Duration(rand.Intn(10)+1) * max / 10)
 bar.Increment()
 }
 // wait for our bar to complete and flush
 p.Wait()
}

Rendering multiple bars

 var wg sync.WaitGroup
 // passed wg will be accounted at p.Wait() call
 p := mpb.New(mpb.WithWaitGroup(&wg))
 total, numBars := 100, 3
 wg.Add(numBars)
 for i := 0; i < numBars; i++ {
 name := fmt.Sprintf("Bar#%d:", i)
 bar := p.AddBar(int64(total),
 mpb.PrependDecorators(
 // simple name decorator
 decor.Name(name),
 // decor.DSyncWidth bit enables column width synchronization
 decor.Percentage(decor.WCSyncSpace),
 ),
 mpb.AppendDecorators(
 // replace ETA decorator with "done" message, OnComplete event
 decor.OnComplete(
 // ETA decorator with ewma age of 30
 decor.EwmaETA(decor.ET_STYLE_GO, 30, decor.WCSyncWidth), "done",
 ),
 ),
 )
 // simulating some work
 go func() {
 defer wg.Done()
 rng := rand.New(rand.NewSource(time.Now().UnixNano()))
 max := 100 * time.Millisecond
 for i := 0; i < total; i++ {
 // start variable is solely for EWMA calculation
 // EWMA's unit of measure is an iteration's duration
 start := time.Now()
 time.Sleep(time.Duration(rng.Intn(10)+1) * max / 10)
 // we need to call EwmaIncrement to fulfill ewma decorator's contract
 bar.EwmaIncrement(time.Since(start))
 }
 }()
 }
 // wait for passed wg and for all bars to complete and flush
 p.Wait()

dynTotal example

complex example

io example