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progress.go
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progress.go
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package local
import (
"io"
"os"
"time"
"github.com/jedib0t/go-pretty/v6/progress"
)
const (
progressTrackerLength = 20
progressTrackerWidth = 40
progressTrackerDone = 100
progressTrackerUpdateFrequency = 50 * time.Millisecond
)
type ProgressUpdaterReader struct {
r io.Reader
t *progress.Tracker
}
func (pu *ProgressUpdaterReader) Read(p []byte) (n int, err error) {
n, err = pu.r.Read(p)
pu.t.Increment(int64(n))
if err == io.EOF {
pu.t.MarkAsDone()
} else if err != nil {
pu.t.IncrementWithError(int64(n))
}
return
}
type ProgressUpdater struct {
t *progress.Tracker
}
func (p *ProgressUpdater) Reader(reader io.Reader) io.Reader {
return &ProgressUpdaterReader{
r: reader,
t: p.t,
}
}
func (p *ProgressUpdater) Done() {
p.t.MarkAsDone()
}
func (p *ProgressUpdater) Error() {
p.t.MarkAsErrored()
}
type ProgressSpinner struct {
t *progress.Tracker
}
func (p *ProgressSpinner) Error() {
p.t.MarkAsErrored()
}
func (p *ProgressSpinner) Done() {
p.t.MarkAsDone()
}
type ProgressPool struct {
pw progress.Writer
done chan bool
}
func (p *ProgressPool) Start() {
const tickerDuration = 25 * time.Millisecond
go p.pw.Render()
go func() {
t := time.NewTicker(tickerDuration)
for {
select {
case <-p.done:
t.Stop()
return
case <-t.C:
}
}
}()
}
func (p *ProgressPool) Stop() {
p.pw.Stop()
p.done <- true
// according to examples, give enough time for the last render loop to complete.
for p.pw.IsRenderInProgress() {
const renderSleep = 5 * time.Millisecond
time.Sleep(renderSleep)
}
}
func (p *ProgressPool) AddReader(name string, sizeBytes int64) *ProgressUpdater {
tracker := &progress.Tracker{
Message: name,
Total: sizeBytes,
Units: progress.UnitsBytes,
}
p.pw.AppendTracker(tracker)
return &ProgressUpdater{t: tracker}
}
func (p *ProgressPool) AddSpinner(name string) *ProgressSpinner {
tracker := &progress.Tracker{
Message: name,
Total: progressTrackerDone,
Units: progress.Units{
Notation: "%",
Formatter: progress.FormatNumber,
},
}
p.pw.AppendTracker(tracker)
return &ProgressSpinner{t: tracker}
}
func NewProgressPool() *ProgressPool {
pw := progress.NewWriter()
pw.SetAutoStop(false) // important
pw.SetTrackerLength(progressTrackerLength)
pw.SetMessageWidth(progressTrackerWidth)
pw.SetSortBy(progress.SortByValue)
pw.SetStyle(progress.StyleDefault)
pw.SetTrackerPosition(progress.PositionRight)
pw.SetUpdateFrequency(progressTrackerUpdateFrequency)
pw.Style().Colors = progress.StyleColorsExample
pw.Style().Options.PercentFormat = "%4.1f%%"
return &ProgressPool{
pw: pw,
done: make(chan bool),
}
}
type fileWrapper struct {
file *os.File
reader io.Reader
}
func (f fileWrapper) Read(p []byte) (n int, err error) {
return f.reader.Read(p)
}
func (f fileWrapper) Seek(offset int64, whence int) (int64, error) {
return f.file.Seek(offset, whence)
}