vendor c/image v5.4.2

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 118 insertions, 0 deletions

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+# Multi Progress Bar
+
+[![GoDoc](https://godoc.org/github.com/vbauerster/mpb?status.svg)](https://godoc.org/github.com/vbauerster/mpb)
+[![Build Status](https://travis-ci.org/vbauerster/mpb.svg?branch=master)](https://travis-ci.org/vbauerster/mpb)
+[![Go Report Card](https://goreportcard.com/badge/github.com/vbauerster/mpb)](https://goreportcard.com/report/github.com/vbauerster/mpb)
+
+**mpb** is a Go lib for rendering progress bars in terminal applications.
+
+## Features
+
+* __Multiple Bars__: Multiple progress bars are supported
+* __Dynamic Total__: Set total while bar is running
+* __Dynamic Add/Remove__: Dynamically add or remove bars
+* __Cancellation__: Cancel whole rendering process
+* __Predefined Decorators__: Elapsed time, [ewma](https://github.com/VividCortex/ewma) based ETA, Percentage, Bytes counter
+* __Decorator's width sync__:  Synchronized decorator's width among multiple bars
+
+## Usage
+
+#### [Rendering single bar](_examples/singleBar/main.go)
+```go
+package main
+
+import (
+    "math/rand"
+    "time"
+
+    "github.com/vbauerster/mpb/v5"
+    "github.com/vbauerster/mpb/v5/decor"
+)
+
+func main() {
+    // initialize progress container, with custom width
+    p := mpb.New(mpb.WithWidth(64))
+
+    total := 100
+    name := "Single Bar:"
+    // adding a single bar, which will inherit container's width
+    bar := p.AddBar(int64(total),
+        // override DefaultBarStyle, which is "[=>-]<+"
+        mpb.BarStyle("╢▌▌░╟"),
+        mpb.PrependDecorators(
+            // display our name with one space on the right
+            decor.Name(name, decor.WC{W: len(name) + 1, C: decor.DidentRight}),
+            // replace ETA decorator with "done" message, OnComplete event
+            decor.OnComplete(
+                decor.AverageETA(decor.ET_STYLE_GO, decor.WC{W: 4}), "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](_examples/multiBars/main.go)
+```go
+    var wg sync.WaitGroup
+    // pass &wg (optional), so p will wait for it eventually
+    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 60
+                    decor.EwmaETA(decor.ET_STYLE_GO, 60), "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)
+                bar.Increment()
+                // we need to call DecoratorEwmaUpdate to fulfill ewma decorator's contract
+                bar.DecoratorEwmaUpdate(time.Since(start))
+            }
+        }()
+    }
+    // Waiting for passed &wg and for all bars to complete and flush
+    p.Wait()
+```
+
+#### [Dynamic total](_examples/dynTotal/main.go)
+
+![dynamic total](_svg/godEMrCZmJkHYH1X9dN4Nm0U7.svg)
+
+#### [Complex example](_examples/complex/main.go)
+
+![complex](_svg/wHzf1M7sd7B3zVa2scBMnjqRf.svg)
+
+#### [Bytes counters](_examples/io/main.go)
+
+![byte counters](_svg/hIpTa3A5rQz65ssiVuRJu87X6.svg)