Function binaryVersion

cmd/errtrace/toolexec.go:269–287

binaryVersion returns a string that uniquely identifies the binary. We prefer to use the VCS info embedded in the build if possible falling back to the MD5 of the binary.

()

// We prefer to use the VCS info embedded in the build if possible
// falling back to the MD5 of the binary.
func binaryVersion() (string, error) {
	sha, ok := readBuildSHA()
	if ok {
		return sha, nil
	}

	exe, err := os.Executable()
	if err != nil {
		return "", errtrace.Wrap(err)
	}

	contents, err := os.ReadFile(exe)
	if err != nil {
		return "", errtrace.Wrap(err)
	}

	binaryHash := md5.Sum(contents)
	return hex.EncodeToString(binaryHash[:]), nil
}

// readBuildSHA returns the VCS SHA, if it's from an unmodified VCS state.
func readBuildSHA() (_ string, ok bool) {