plugin/pkg/dnsutil/join.go


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package dnsutil

import (
	"strings"

	"github.com/miekg/dns"
)

// Join joins labels to form a fully qualified domain name. If the last label is
// the root label it is ignored. Not other syntax checks are performed.
func Join(labels []string) string {
	ll := len(labels)
	if labels[ll-1] == "." {
		s := strings.Join(labels[:ll-1], ".")
		return dns.Fqdn(s)
	}
	s := strings.Join(labels, ".")
	return dns.Fqdn(s)
}