fix: improve test command and enhance message channel buffer size

Author: grishy

.github/workflows/commit.yml

@@ -37,7 +37,7 @@ jobs:
 
       - run: go mod verify
 
-      - run: go test -v ./...
+      - run: go test -race -shuffle=on -count=1 -v ./...
 
       - uses: golangci/golangci-lint-action@v9
         with:

cmd/cname.go

@@ -53,8 +53,6 @@ func publishing(ctx context.Context, publisher *avahi.Publisher, cnames []string
 			}
 		case <-ctx.Done():
 			fmt.Println() // Add new line after ^C
-			slog.Info("closing publisher")
-			publisher.Close()
 			return nil
 		}
 	}
@@ -124,6 +122,7 @@ func Cname(ctx context.Context) *cli.Command {
 			if err != nil {
 				return fmt.Errorf("failed to create publisher: %w", err)
 			}
+			defer publisher.Close()
 
 			if fqdn == "" {
 				slog.Info("getting FQDN from Avahi")

cmd/subdomain_listener.go

@@ -94,7 +94,7 @@ func listen() (*net.UDPConn, *ipv4.PacketConn, error) {
 
 func reader(ctx context.Context, conn *net.UDPConn) <-chan *dnsMsg {
 	buf := make([]byte, 1500)
-	msgCh := make(chan *dnsMsg)
+	msgCh := make(chan *dnsMsg, 1)
 
 	go func() {
 		defer close(msgCh)