Joe Tsai 469b7cabad
cmd/tailscale: improve taildrop progress printer on Linux (#9878)
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>
2023-10-19 11:04:33 -07:00
..
2023-08-03 13:00:45 -07:00