feat(netlink): add debug logger

cmd/gluetun/main.go

@@ -77,7 +77,8 @@ func main() {
 
 	args := os.Args
 	tun := tun.New()
-	netLinker := netlink.New()
+	netLinkDebugLogger := logger.New(log.SetComponent("netlink"))
+	netLinker := netlink.New(netLinkDebugLogger)
 	cli := cli.New()
 	cmder := command.NewCmder()
 

internal/netlink/interfaces.go

@@ -0,0 +1,5 @@
+package netlink
+
+type DebugLogger interface {
+	Debugf(format string, args ...any)
+}

internal/netlink/netlink.go

@@ -1,7 +1,11 @@
 package netlink
 
-type NetLink struct{}
-
-func New() *NetLink {
-	return &NetLink{}
+type NetLink struct {
+	debugLogger DebugLogger
+}
+
+func New(debugLogger DebugLogger) *NetLink {
+	return &NetLink{
+		debugLogger: debugLogger,
+	}
 }