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github.com/james-antill/mpb
This is a fork from github.com/vbauerster/mpb. There are a few differences, but they are mostly cosmetic. The major points of design are:
mpb is a Go lib for rendering progress bars in terminal applications.
To get the package, execute:
go get github.com/james-antill/mpb
Following is the simplest use case:
p := mpb.New(
// override default (80) width
mpb.WithWidth(100),
// override default "[=>-]" format
mpb.WithFormat("╢▌▌░╟"),
// override default 100ms refresh rate
mpb.WithRefreshRate(120*time.Millisecond),
)
total := 100
name := "Single Bar:"
// Add a bar
// You're not limited to just a single bar, add as many as you need
bar := p.AddBar(int64(total),
// Prepending decorators
mpb.PrependDecorators(
// StaticName decorator with minWidth and no extra config
// If you need to change name while rendering, use DynamicName
decor.StaticName(name, len(name), 0),
// ETA decorator with minWidth and no extra config
decor.ETA(4, 0),
),
// Appending decorators
mpb.AppendDecorators(
// Percentage decorator with minWidth and no extra config
decor.Percentage(5, 0),
),
)
for i := 0; i < total; i++ {
time.Sleep(time.Duration(rand.Intn(10)+1) * time.Second / 100)
bar.Increment()
}
p.Stop()
Running this, will produce:
However mpb was designed with concurrency in mind. Each new bar renders in its own goroutine, therefore adding multiple bars is easy and safe:
var wg sync.WaitGroup
p := mpb.New(mpb.WithWaitGroup(&wg))
total := 100
numBars := 3
wg.Add(numBars)
for i := 0; i < numBars; i++ {
name := fmt.Sprintf("Bar#%d:", i)
bar := p.AddBar(int64(total),
mpb.PrependDecorators(
decor.StaticName(name, 0, 0),
// DSyncSpace is shortcut for DwidthSync|DextraSpace
// means sync the width of respective decorator's column
// and prepend one extra space.
decor.Percentage(3, decor.DSyncSpace),
),
mpb.AppendDecorators(
decor.ETA(2, 0),
),
)
go func() {
defer wg.Done()
for i := 0; i < total; i++ {
time.Sleep(time.Duration(rand.Intn(10)+1) * time.Second / 100)
bar.Increment()
}
}()
}
// Wait for incr loop goroutines to finish,
// and shutdown mpb's rendering goroutine
p.Stop()
The source code: examples/simple/main.go
The source code: examples/cancel/main.go
The source code: examples/remove/main.go
The source code: examples/sort/main.go
The source code: examples/prependETA/main.go
The source code: examples/io/multiple/main.go
The typeface used in screen shots: Iosevka
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