selfupdate

Documentation

Overview

Package selfupdate implements `dockercmd --self-upgrade`: download the latest GitHub release asset for this OS/arch, verify its SHA-256 and atomically replace the running executable.

Self-update executes downloaded code, so the checksum check is mandatory: the binary is only swapped in once its SHA-256 matches the digest GitHub records for the asset. The download lands in the target directory (same filesystem) so the final swap is an atomic rename.

Index

• func Run(ctx context.Context, current string, w io.Writer, checkOnly bool) error

Functions

func Run

func Run(ctx context.Context, current string, w io.Writer, checkOnly bool) error

Run checks for a newer release and, unless checkOnly is set, downloads and installs it. Progress is written to w; it is a no-op (with a message) when the running version is already current.