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authorDaniel J Walsh <dwalsh@redhat.com>2021-06-16 05:57:09 -0400
committerDaniel J Walsh <dwalsh@redhat.com>2021-06-17 14:59:42 -0400
commitb6662eed3f27ac5466501b046db4f1608845af61 (patch)
tree7a4f80a77f812505a6261bc11ed8151235f903f1 /vendor/github.com/vbauerster/mpb/v7/progress.go
parent725b5001a17f703d95a3c88e4f58225c5290576b (diff)
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Vendor in containers/common v0.40.0
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Diffstat (limited to 'vendor/github.com/vbauerster/mpb/v7/progress.go')
-rw-r--r--vendor/github.com/vbauerster/mpb/v7/progress.go412
1 files changed, 412 insertions, 0 deletions
diff --git a/vendor/github.com/vbauerster/mpb/v7/progress.go b/vendor/github.com/vbauerster/mpb/v7/progress.go
new file mode 100644
index 000000000..b2017f3f0
--- /dev/null
+++ b/vendor/github.com/vbauerster/mpb/v7/progress.go
@@ -0,0 +1,412 @@
+package mpb
+
+import (
+ "bytes"
+ "container/heap"
+ "context"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "log"
+ "math"
+ "os"
+ "sync"
+ "time"
+
+ "github.com/vbauerster/mpb/v7/cwriter"
+ "github.com/vbauerster/mpb/v7/decor"
+)
+
+const (
+ // default RefreshRate
+ prr = 120 * time.Millisecond
+)
+
+// Progress represents a container that renders one or more progress
+// bars.
+type Progress struct {
+ ctx context.Context
+ uwg *sync.WaitGroup
+ cwg *sync.WaitGroup
+ bwg *sync.WaitGroup
+ operateState chan func(*pState)
+ done chan struct{}
+ refreshCh chan time.Time
+ once sync.Once
+ dlogger *log.Logger
+}
+
+// pState holds bars in its priorityQueue. It gets passed to
+// *Progress.serve(...) monitor goroutine.
+type pState struct {
+ bHeap priorityQueue
+ heapUpdated bool
+ pMatrix map[int][]chan int
+ aMatrix map[int][]chan int
+ barShutdownQueue []*Bar
+
+ // following are provided/overrided by user
+ idCount int
+ reqWidth int
+ popCompleted bool
+ outputDiscarded bool
+ rr time.Duration
+ uwg *sync.WaitGroup
+ externalRefresh <-chan interface{}
+ renderDelay <-chan struct{}
+ shutdownNotifier chan struct{}
+ parkedBars map[*Bar]*Bar
+ output io.Writer
+ debugOut io.Writer
+}
+
+// New creates new Progress container instance. It's not possible to
+// reuse instance after *Progress.Wait() method has been called.
+func New(options ...ContainerOption) *Progress {
+ return NewWithContext(context.Background(), options...)
+}
+
+// NewWithContext creates new Progress container instance with provided
+// context. It's not possible to reuse instance after *Progress.Wait()
+// method has been called.
+func NewWithContext(ctx context.Context, options ...ContainerOption) *Progress {
+ s := &pState{
+ bHeap: priorityQueue{},
+ rr: prr,
+ parkedBars: make(map[*Bar]*Bar),
+ output: os.Stdout,
+ debugOut: ioutil.Discard,
+ }
+
+ for _, opt := range options {
+ if opt != nil {
+ opt(s)
+ }
+ }
+
+ p := &Progress{
+ ctx: ctx,
+ uwg: s.uwg,
+ cwg: new(sync.WaitGroup),
+ bwg: new(sync.WaitGroup),
+ operateState: make(chan func(*pState)),
+ done: make(chan struct{}),
+ dlogger: log.New(s.debugOut, "[mpb] ", log.Lshortfile),
+ }
+
+ p.cwg.Add(1)
+ go p.serve(s, cwriter.New(s.output))
+ return p
+}
+
+// AddBar creates a bar with default bar filler. Different filler can
+// be chosen and applied via `*Progress.Add(...) *Bar` method.
+func (p *Progress) AddBar(total int64, options ...BarOption) *Bar {
+ return p.Add(total, NewBarFiller(BarStyle()), options...)
+}
+
+// AddSpinner creates a bar with default spinner filler. Different
+// filler can be chosen and applied via `*Progress.Add(...) *Bar`
+// method.
+func (p *Progress) AddSpinner(total int64, options ...BarOption) *Bar {
+ return p.Add(total, NewBarFiller(SpinnerStyle()), options...)
+}
+
+// Add creates a bar which renders itself by provided filler.
+// If `total <= 0` trigger complete event is disabled until reset with *bar.SetTotal(int64, bool).
+// Panics if *Progress instance is done, i.e. called after *Progress.Wait().
+func (p *Progress) Add(total int64, filler BarFiller, options ...BarOption) *Bar {
+ if filler == nil {
+ filler = BarFillerFunc(func(io.Writer, int, decor.Statistics) {})
+ }
+ p.bwg.Add(1)
+ result := make(chan *Bar)
+ select {
+ case p.operateState <- func(ps *pState) {
+ bs := ps.makeBarState(total, filler, options...)
+ bar := newBar(p, bs)
+ if bs.runningBar != nil {
+ bs.runningBar.noPop = true
+ ps.parkedBars[bs.runningBar] = bar
+ } else {
+ heap.Push(&ps.bHeap, bar)
+ ps.heapUpdated = true
+ }
+ ps.idCount++
+ result <- bar
+ }:
+ bar := <-result
+ bar.subscribeDecorators()
+ return bar
+ case <-p.done:
+ p.bwg.Done()
+ panic(fmt.Sprintf("%T instance can't be reused after it's done!", p))
+ }
+}
+
+func (p *Progress) dropBar(b *Bar) {
+ select {
+ case p.operateState <- func(s *pState) {
+ if b.index < 0 {
+ return
+ }
+ heap.Remove(&s.bHeap, b.index)
+ s.heapUpdated = true
+ }:
+ case <-p.done:
+ }
+}
+
+func (p *Progress) setBarPriority(b *Bar, priority int) {
+ select {
+ case p.operateState <- func(s *pState) {
+ if b.index < 0 {
+ return
+ }
+ b.priority = priority
+ heap.Fix(&s.bHeap, b.index)
+ }:
+ case <-p.done:
+ }
+}
+
+// UpdateBarPriority same as *Bar.SetPriority(int).
+func (p *Progress) UpdateBarPriority(b *Bar, priority int) {
+ p.setBarPriority(b, priority)
+}
+
+// BarCount returns bars count.
+func (p *Progress) BarCount() int {
+ result := make(chan int, 1)
+ select {
+ case p.operateState <- func(s *pState) { result <- s.bHeap.Len() }:
+ return <-result
+ case <-p.done:
+ return 0
+ }
+}
+
+// Wait waits for all bars to complete and finally shutdowns container.
+// After this method has been called, there is no way to reuse *Progress
+// instance.
+func (p *Progress) Wait() {
+ if p.uwg != nil {
+ // wait for user wg
+ p.uwg.Wait()
+ }
+
+ // wait for bars to quit, if any
+ p.bwg.Wait()
+
+ p.once.Do(p.shutdown)
+
+ // wait for container to quit
+ p.cwg.Wait()
+}
+
+func (p *Progress) shutdown() {
+ close(p.done)
+}
+
+func (p *Progress) serve(s *pState, cw *cwriter.Writer) {
+ defer p.cwg.Done()
+
+ p.refreshCh = s.newTicker(p.done)
+
+ for {
+ select {
+ case op := <-p.operateState:
+ op(s)
+ case <-p.refreshCh:
+ if err := s.render(cw); err != nil {
+ p.dlogger.Println(err)
+ }
+ case <-s.shutdownNotifier:
+ if s.heapUpdated {
+ if err := s.render(cw); err != nil {
+ p.dlogger.Println(err)
+ }
+ }
+ return
+ }
+ }
+}
+
+func (s *pState) newTicker(done <-chan struct{}) chan time.Time {
+ ch := make(chan time.Time)
+ if s.shutdownNotifier == nil {
+ s.shutdownNotifier = make(chan struct{})
+ }
+ go func() {
+ if s.renderDelay != nil {
+ <-s.renderDelay
+ }
+ var internalRefresh <-chan time.Time
+ if !s.outputDiscarded {
+ if s.externalRefresh == nil {
+ ticker := time.NewTicker(s.rr)
+ defer ticker.Stop()
+ internalRefresh = ticker.C
+ }
+ } else {
+ s.externalRefresh = nil
+ }
+ for {
+ select {
+ case t := <-internalRefresh:
+ ch <- t
+ case x := <-s.externalRefresh:
+ if t, ok := x.(time.Time); ok {
+ ch <- t
+ } else {
+ ch <- time.Now()
+ }
+ case <-done:
+ close(s.shutdownNotifier)
+ return
+ }
+ }
+ }()
+ return ch
+}
+
+func (s *pState) render(cw *cwriter.Writer) error {
+ if s.heapUpdated {
+ s.updateSyncMatrix()
+ s.heapUpdated = false
+ }
+ syncWidth(s.pMatrix)
+ syncWidth(s.aMatrix)
+
+ tw, err := cw.GetWidth()
+ if err != nil {
+ tw = s.reqWidth
+ }
+ for i := 0; i < s.bHeap.Len(); i++ {
+ bar := s.bHeap[i]
+ go bar.render(tw)
+ }
+
+ return s.flush(cw)
+}
+
+func (s *pState) flush(cw *cwriter.Writer) error {
+ var lineCount int
+ bm := make(map[*Bar]struct{}, s.bHeap.Len())
+ for s.bHeap.Len() > 0 {
+ b := heap.Pop(&s.bHeap).(*Bar)
+ cw.ReadFrom(<-b.frameCh)
+ if b.toShutdown {
+ if b.recoveredPanic != nil {
+ s.barShutdownQueue = append(s.barShutdownQueue, b)
+ b.toShutdown = false
+ } else {
+ // shutdown at next flush
+ // this ensures no bar ends up with less than 100% rendered
+ defer func() {
+ s.barShutdownQueue = append(s.barShutdownQueue, b)
+ }()
+ }
+ }
+ lineCount += b.extendedLines + 1
+ bm[b] = struct{}{}
+ }
+
+ for _, b := range s.barShutdownQueue {
+ if parkedBar := s.parkedBars[b]; parkedBar != nil {
+ parkedBar.priority = b.priority
+ heap.Push(&s.bHeap, parkedBar)
+ delete(s.parkedBars, b)
+ b.toDrop = true
+ }
+ if s.popCompleted && !b.noPop {
+ lineCount -= b.extendedLines + 1
+ b.toDrop = true
+ }
+ if b.toDrop {
+ delete(bm, b)
+ s.heapUpdated = true
+ }
+ b.cancel()
+ }
+ s.barShutdownQueue = s.barShutdownQueue[0:0]
+
+ for b := range bm {
+ heap.Push(&s.bHeap, b)
+ }
+
+ return cw.Flush(lineCount)
+}
+
+func (s *pState) updateSyncMatrix() {
+ s.pMatrix = make(map[int][]chan int)
+ s.aMatrix = make(map[int][]chan int)
+ for i := 0; i < s.bHeap.Len(); i++ {
+ bar := s.bHeap[i]
+ table := bar.wSyncTable()
+ pRow, aRow := table[0], table[1]
+
+ for i, ch := range pRow {
+ s.pMatrix[i] = append(s.pMatrix[i], ch)
+ }
+
+ for i, ch := range aRow {
+ s.aMatrix[i] = append(s.aMatrix[i], ch)
+ }
+ }
+}
+
+func (s *pState) makeBarState(total int64, filler BarFiller, options ...BarOption) *bState {
+ bs := &bState{
+ id: s.idCount,
+ priority: s.idCount,
+ reqWidth: s.reqWidth,
+ total: total,
+ filler: filler,
+ extender: func(r io.Reader, _ int, _ decor.Statistics) (io.Reader, int) { return r, 0 },
+ debugOut: s.debugOut,
+ }
+
+ if total > 0 {
+ bs.triggerComplete = true
+ }
+
+ for _, opt := range options {
+ if opt != nil {
+ opt(bs)
+ }
+ }
+
+ if bs.middleware != nil {
+ bs.filler = bs.middleware(filler)
+ bs.middleware = nil
+ }
+
+ if s.popCompleted && !bs.noPop {
+ bs.priority = -(math.MaxInt32 - s.idCount)
+ }
+
+ bs.bufP = bytes.NewBuffer(make([]byte, 0, 128))
+ bs.bufB = bytes.NewBuffer(make([]byte, 0, 256))
+ bs.bufA = bytes.NewBuffer(make([]byte, 0, 128))
+
+ return bs
+}
+
+func syncWidth(matrix map[int][]chan int) {
+ for _, column := range matrix {
+ go maxWidthDistributor(column)
+ }
+}
+
+var maxWidthDistributor = func(column []chan int) {
+ var maxWidth int
+ for _, ch := range column {
+ if w := <-ch; w > maxWidth {
+ maxWidth = w
+ }
+ }
+ for _, ch := range column {
+ ch <- maxWidth
+ }
+}