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cmd/tailscale: improve taildrop progress printer on Linux (#9878)

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The progress printer was buggy where it would not print correctly
and some of the truncation logic was faulty.

The progress printer now prints something like:

	go1.21.3.linux-amd64.tar.gz               21.53MiB      13.83MiB/s     33.88%    ETA 00:00:03

where it shows
* the number of bytes transferred so far
* the rate of bytes transferred
  (using a 1-second half-life for an exponentially weighted average)
* the progress made as a percentage
* the estimated time
  (as calculated from the rate of bytes transferred)

Other changes:
* It now correctly prints the progress for very small files
* It prints at a faster rate (4Hz instead of 1Hz)
* It uses IEC units for byte quantities
  (to avoid ambiguities of "kb" being kilobits or kilobytes)

Updates tailscale/corp#14772

Signed-off-by: Joe Tsai <joetsai@digital-static.net>
pull/9885/head
Joe Tsai 1 year ago committed by GitHub
parent 7a3ae39025
commit 469b7cabad
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 75 additions and 47 deletions
Show Stats Download Patch File Download Diff File

121
cmd/tailscale/cli/file.go
Unescape Escape View File

@ -18,7 +18,6 @@ import (
"path"
"path/filepath"
"strings"
"sync"
"sync/atomic"
"time"
"unicode/utf8"
@ -29,8 +28,11 @@ import (
"tailscale.com/client/tailscale/apitype"
"tailscale.com/envknob"
"tailscale.com/net/tsaddr"
"tailscale.com/syncs"
"tailscale.com/tailcfg"
tsrate "tailscale.com/tstime/rate"
"tailscale.com/util/quarantine"
"tailscale.com/util/truncate"
"tailscale.com/version"
)
@ -52,12 +54,12 @@ var fileCmd = &ffcli.Command{
type countingReader struct {
io.Reader
n atomic.Uint64
n atomic.Int64
}
func (c *countingReader) Read(buf []byte) (int, error) {
n, err := c.Reader.Read(buf)
c.n.Add(uint64(n))
c.n.Add(int64(n))
return n, err
}
@ -170,75 +172,100 @@ func runCp(ctx context.Context, args []string) error {
log.Printf("sending %q to %v/%v/%v ...", name, target, ip, stableID)
}
var (
done = make(chan struct{}, 1)
wg sync.WaitGroup
)
var group syncs.WaitGroup
ctxProgress, cancelProgress := context.WithCancel(ctx)
defer cancelProgress()
if isatty.IsTerminal(os.Stderr.Fd()) {
go printProgress(&wg, done, fileContents, name, contentLength)
wg.Add(1)
group.Go(func() { progressPrinter(ctxProgress, name, fileContents.n.Load, contentLength) })
}
err := localClient.PushFile(ctx, stableID, contentLength, name, fileContents)
cancelProgress()
group.Wait() // wait for progress printer to stop before reporting the error
if err != nil {
return err
}
if cpArgs.verbose {
log.Printf("sent %q", name)
}
done <- struct{}{}
wg.Wait()
}
return nil
}
const vtRestartLine = "\r\x1b[K"
func printProgress(wg *sync.WaitGroup, done <-chan struct{}, r *countingReader, name string, contentLength int64) {
defer wg.Done()
var lastBytesRead uint64
func progressPrinter(ctx context.Context, name string, contentCount func() int64, contentLength int64) {
var rateValueFast, rateValueSlow tsrate.Value
rateValueFast.HalfLife = 1 * time.Second // fast response for rate measurement
rateValueSlow.HalfLife = 10 * time.Second // slow response for ETA measurement
var prevContentCount int64
print := func() {
currContentCount := contentCount()
rateValueFast.Add(float64(currContentCount - prevContentCount))
rateValueSlow.Add(float64(currContentCount - prevContentCount))
prevContentCount = currContentCount
const vtRestartLine = "\r\x1b[K"
fmt.Fprintf(os.Stderr, "%s%s %s %s",
vtRestartLine,
rightPad(name, 36),
leftPad(formatIEC(float64(currContentCount), "B"), len("1023.00MiB")),
leftPad(formatIEC(rateValueFast.Rate(), "B/s"), len("1023.00MiB/s")))
if contentLength >= 0 {
currContentCount = min(currContentCount, contentLength) // cap at 100%
ratioRemain := float64(currContentCount) / float64(contentLength)
bytesRemain := float64(contentLength - currContentCount)
secsRemain := bytesRemain / rateValueSlow.Rate()
secs := int(min(max(0, secsRemain), 99*60*60+59+60+59))
fmt.Fprintf(os.Stderr, " %s %s",
leftPad(fmt.Sprintf("%0.2f%%", 100.0*ratioRemain), len("100.00%")),
fmt.Sprintf("ETA %02d:%02d:%02d", secs/60/60, (secs/60)%60, secs%60))
}
}
tc := time.NewTicker(250 * time.Millisecond)
defer tc.Stop()
print()
for {
select {
case <-done:
case <-ctx.Done():
print()
fmt.Fprintln(os.Stderr)
return
case <-time.After(time.Second):
n := r.n.Load()
contentLengthStr := "???"
if contentLength > 0 {
contentLengthStr = fmt.Sprint(contentLength / 1024)
}
fmt.Fprintf(os.Stderr, "%s%s\t\t%s", vtRestartLine, padTruncateString(name, 36), padTruncateString(fmt.Sprintf("%d/%s kb", n/1024, contentLengthStr), 16))
if contentLength > 0 {
fmt.Fprintf(os.Stderr, "\t%.02f%%", float64(n)/float64(contentLength)*100)
} else {
fmt.Fprintf(os.Stderr, "\t-------%%")
}
if lastBytesRead > 0 {
fmt.Fprintf(os.Stderr, "\t%d kb/s", (n-lastBytesRead)/1024)
} else {
fmt.Fprintf(os.Stderr, "\t-------")
}
lastBytesRead = n
case <-tc.C:
print()
}
}
}
func padTruncateString(str string, truncateAt int) string {
if len(str) <= truncateAt {
return str + strings.Repeat(" ", truncateAt-len(str))
func leftPad(s string, n int) string {
s = truncateString(s, n)
return strings.Repeat(" ", max(n-len(s), 0)) + s
}
func rightPad(s string, n int) string {
s = truncateString(s, n)
return s + strings.Repeat(" ", max(n-len(s), 0))
}
func truncateString(s string, n int) string {
if len(s) <= n {
return s
}
return truncate.String(s, max(n-1, 0)) + "…"
}
// Truncate the string, but respect unicode codepoint boundaries.
// As of RFC3629 utf-8 codepoints can be at most 4 bytes wide.
for i := 1; i <= 4 && i < len(str)-truncateAt; i++ {
if utf8.ValidString(str[:truncateAt-i]) {
return str[:truncateAt-i] + "…"
}
func formatIEC(n float64, unit string) string {
switch {
case n < 1<<10:
return fmt.Sprintf("%0.2f%s", n/(1<<0), unit)
case n < 1<<20:
return fmt.Sprintf("%0.2fKi%s", n/(1<<10), unit)
case n < 1<<30:
return fmt.Sprintf("%0.2fMi%s", n/(1<<20), unit)
case n < 1<<40:
return fmt.Sprintf("%0.2fGi%s", n/(1<<30), unit)
default:
return fmt.Sprintf("%0.2fTi%s", n/(1<<40), unit)
}
return "" // Should be unreachable
}
func getTargetStableID(ctx context.Context, ipStr string) (id tailcfg.StableNodeID, isOffline bool, err error) {

1
cmd/tailscale/depaware.txt
Unescape Escape View File

@ -158,6 +158,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
tailscale.com/util/singleflight from tailscale.com/net/dnscache
tailscale.com/util/slicesx from tailscale.com/net/dnscache+
tailscale.com/util/testenv from tailscale.com/cmd/tailscale/cli
tailscale.com/util/truncate from tailscale.com/cmd/tailscale/cli
tailscale.com/util/vizerror from tailscale.com/types/ipproto+
💣 tailscale.com/util/winutil from tailscale.com/hostinfo+
W 💣 tailscale.com/util/winutil/authenticode from tailscale.com/clientupdate

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