DockerCLI/vendor/github.com/moby/buildkit/util/progress/progressui/printer.go

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package progressui
import (
"fmt"
"io"
"time"
digest "github.com/opencontainers/go-digest"
"github.com/tonistiigi/units"
)
const antiFlicker = 5 * time.Second
const maxDelay = 10 * time.Second
const minTimeDelta = 5 * time.Second
const minProgressDelta = 0.05 // %
type lastStatus struct {
Current int64
Timestamp time.Time
}
type textMux struct {
w io.Writer
current digest.Digest
last map[string]lastStatus
}
func (p *textMux) printVtx(t *trace, dgst digest.Digest) {
if p.last == nil {
p.last = make(map[string]lastStatus)
}
v, ok := t.byDigest[dgst]
if !ok {
return
}
if dgst != p.current {
if p.current != "" {
old := t.byDigest[p.current]
if old.logsPartial {
fmt.Fprintln(p.w, "")
}
old.logsOffset = 0
old.count = 0
fmt.Fprintf(p.w, "#%d ...\n", v.index)
}
fmt.Fprintf(p.w, "\n#%d %s\n", v.index, limitString(v.Name, 72))
}
if len(v.events) != 0 {
v.logsOffset = 0
}
for _, ev := range v.events {
fmt.Fprintf(p.w, "#%d %s\n", v.index, ev)
}
v.events = v.events[:0]
for _, s := range v.statuses {
if _, ok := v.statusUpdates[s.ID]; ok {
doPrint := true
if last, ok := p.last[s.ID]; ok && s.Completed == nil {
var progressDelta float64
if s.Total > 0 {
progressDelta = float64(s.Current-last.Current) / float64(s.Total)
}
timeDelta := s.Timestamp.Sub(last.Timestamp)
if progressDelta < minProgressDelta && timeDelta < minTimeDelta {
doPrint = false
}
}
if !doPrint {
continue
}
p.last[s.ID] = lastStatus{
Timestamp: s.Timestamp,
Current: s.Current,
}
var bytes string
if s.Total != 0 {
bytes = fmt.Sprintf(" %.2f / %.2f", units.Bytes(s.Current), units.Bytes(s.Total))
} else if s.Current != 0 {
bytes = fmt.Sprintf(" %.2f", units.Bytes(s.Current))
}
var tm string
endTime := s.Timestamp
if s.Completed != nil {
endTime = *s.Completed
}
if s.Started != nil {
diff := endTime.Sub(*s.Started).Seconds()
if diff > 0.01 {
tm = fmt.Sprintf(" %.1fs", diff)
}
}
if s.Completed != nil {
tm += " done"
}
fmt.Fprintf(p.w, "#%d %s%s%s\n", v.index, s.ID, bytes, tm)
}
}
v.statusUpdates = map[string]struct{}{}
for i, l := range v.logs {
if i == 0 {
l = l[v.logsOffset:]
}
fmt.Fprintf(p.w, "%s", []byte(l))
if i != len(v.logs)-1 || !v.logsPartial {
fmt.Fprintln(p.w, "")
}
}
if len(v.logs) > 0 {
if v.logsPartial {
v.logs = v.logs[len(v.logs)-1:]
v.logsOffset = len(v.logs[0])
} else {
v.logs = nil
v.logsOffset = 0
}
}
p.current = dgst
if v.Completed != nil {
p.current = ""
v.count = 0
fmt.Fprintf(p.w, "\n")
}
delete(t.updates, dgst)
}
func (p *textMux) print(t *trace) {
completed := map[digest.Digest]struct{}{}
rest := map[digest.Digest]struct{}{}
for dgst := range t.updates {
v, ok := t.byDigest[dgst]
if !ok {
continue
}
if v.Vertex.Completed != nil {
completed[dgst] = struct{}{}
} else {
rest[dgst] = struct{}{}
}
}
current := p.current
// items that have completed need to be printed first
if _, ok := completed[current]; ok {
p.printVtx(t, current)
}
for dgst := range completed {
if dgst != current {
p.printVtx(t, dgst)
}
}
if len(rest) == 0 {
if current != "" {
if v := t.byDigest[current]; v.Started != nil && v.Completed == nil {
return
}
}
// make any open vertex active
for dgst, v := range t.byDigest {
if v.Started != nil && v.Completed == nil {
p.printVtx(t, dgst)
return
}
}
return
}
// now print the active one
if _, ok := rest[current]; ok {
p.printVtx(t, current)
}
stats := map[digest.Digest]*vtxStat{}
now := time.Now()
sum := 0.0
var max digest.Digest
if current != "" {
rest[current] = struct{}{}
}
for dgst := range rest {
v, ok := t.byDigest[dgst]
if !ok {
continue
}
tm := now.Sub(*v.lastBlockTime)
speed := float64(v.count) / tm.Seconds()
overLimit := tm > maxDelay && dgst != current
stats[dgst] = &vtxStat{blockTime: tm, speed: speed, overLimit: overLimit}
sum += speed
if overLimit || max == "" || stats[max].speed < speed {
max = dgst
}
}
for dgst := range stats {
stats[dgst].share = stats[dgst].speed / sum
}
if _, ok := completed[current]; ok || current == "" {
p.printVtx(t, max)
return
}
// show items that were hidden
for dgst := range rest {
if stats[dgst].overLimit {
p.printVtx(t, dgst)
return
}
}
// fair split between vertexes
if 1.0/(1.0-stats[current].share)*antiFlicker.Seconds() < stats[current].blockTime.Seconds() {
p.printVtx(t, max)
return
}
}
type vtxStat struct {
blockTime time.Duration
speed float64
share float64
overLimit bool
}
func limitString(s string, l int) string {
if len(s) > l {
return s[:l] + "..."
}
return s
}