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a8f3c861a4
Add three new helpers to the existing progresstracking package:
- Ticker: spawns a 1 Hz goroutine that calls a report function with
the current value of an atomic counter and a total. Returns a stop
function (safe to call multiple times via sync.OnceFunc) that fires
one final report and blocks until the goroutine exits.
- NewWriter: wraps an io.Writer and calls onProgress at most once per
interval with the cumulative byte count.
- CountingWriter: an io.Writer that atomically counts bytes written,
for use with Ticker.
These will be used by the appliance flash and OTA update code in
subsequent commits.
Updates #1866
Change-Id: If353cea6506f5351b6fb19bfdb7bc9b78fe7855e
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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| .. | ||
| distsign | ||
| testdata | ||
| clientupdate_downloads.go | ||
| clientupdate_gokrazy.go | ||
| clientupdate_not_downloads.go | ||
| clientupdate_notwindows.go | ||
| clientupdate_test.go | ||
| clientupdate_windows.go | ||
| clientupdate.go | ||