X:        computeRandom(), // json encodes all the bits
		Week:     expiryDate,
		LastWeek: lastWeek,
	}
	if report.X > u.config.SampleRate && u.config.SampleRate > 0 {
		u.logger.Printf("X: %f > SampleRate:%f, not uploadable", report.X, u.config.SampleRate)
		uploadOK = false
	}
	var succeeded bool
	for _, f := range countFiles {
		fok := false
		x, err := u.parseCountFile(f)
		if err != nil {

// Common types and directories used by multiple packages.

// An UploadConfig controls what data is uploaded.
type UploadConfig struct {
	GOOS       []string
	GOARCH     []string
	GoVersion  []string
	SampleRate float64
	Programs   []*ProgramConfig
}

type ProgramConfig struct {
	// the counter names may have to be
	// repeated for each program. (e.g., if the counters are in a package