fix repocard issues (#21)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

util/mdns/client.go

@@ -122,12 +122,13 @@ func Listen(entries chan<- *ServiceEntry, exit chan struct{}) error {
 
 	ip := make(map[string]*ServiceEntry)
 
+loop:
 	for {
 		select {
 		case <-exit:
-			return nil
+			break loop
 		case <-client.closedCh:
-			return nil
+			break loop
 		case m := <-msgCh:
 			e := messageToEntry(m, ip)
 			if e == nil {

util/mdns/server.go

@@ -163,7 +163,9 @@ func (s *Server) Shutdown() error {
 
 	s.shutdown = true
 	close(s.shutdownCh)
-	s.unregister()
+	if err := s.unregister(); err != nil {
+		return err
+	}
 
 	if s.ipv4List != nil {
 		s.ipv4List.Close()

util/pki/pki.go

@@ -147,6 +147,7 @@ func Sign(CACrt, CAKey, CSR []byte, opts ...CertOption) ([]byte, error) {
 	return out.Bytes(), nil
 }
 
+//nolint:gocritic
 func decodePEM(PEM []byte) ([]*pem.Block, error) {
 	var blocks []*pem.Block
 	var asn1 *pem.Block

util/tls/tls.go

@@ -60,7 +60,9 @@ func Certificate(host ...string) (tls.Certificate, error) {
 
 	// create public key
 	certOut := bytes.NewBuffer(nil)
-	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
+	if err = pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
+		return tls.Certificate{}, err
+	}
 
 	// create private key
 	keyOut := bytes.NewBuffer(nil)
@@ -68,7 +70,9 @@ func Certificate(host ...string) (tls.Certificate, error) {
 	if err != nil {
 		return tls.Certificate{}, err
 	}
-	pem.Encode(keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: b})
+	if err = pem.Encode(keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}); err != nil {
+		return tls.Certificate{}, err
+	}
 
 	return tls.X509KeyPair(certOut.Bytes(), keyOut.Bytes())
 }