update

func Run ¶

func Run(stdout, stderr io.Writer) error

Run upgrades tickli in place by re-running `go install`.

func StartCheck ¶

func StartCheck(current string) func(w io.Writer)

StartCheck launches an update check in the background and returns a function that prints a one-line notice to w when a newer version is available.

The check runs concurrently with the caller's work (which is typically blocked on network I/O of its own), so it adds no perceptible latency. The returned function waits at most printGrace for the check to finish.