Function appendDistributionSourceLabel

core/remotes/docker/handler.go:79–103

(originLabel, repo string)

}

func appendDistributionSourceLabel(originLabel, repo string) string {
	repos := []string{}
	if originLabel != "" {
		repos = strings.Split(originLabel, ",")
	}
	repos = append(repos, repo)

	// use empty string to present duplicate items
	for i := 1; i < len(repos); i++ {
		tmp, j := repos[i], i-1
		for ; j >= 0 && repos[j] >= tmp; j-- {
			if repos[j] == tmp {
				tmp = ""
			}
			repos[j+1] = repos[j]
		}
		repos[j+1] = tmp
	}

	i := 0
	for ; i < len(repos) && repos[i] == ""; i++ {
	}

	return strings.Join(repos[i:], ",")
}

func distributionSourceLabelKey(source string) string {
	return labels.LabelDistributionSource + "." + source