Backward compatibility systemd with windows

systemd/systemd.go

@@ -2,6 +2,9 @@
 // Use of this source code is governed by the GNU GPL v3
 // license that can be found in the LICENSE file.
 
+//go:build !windows
+// +build !windows
+
 package systemd // import "github.com/wabarc/wayback/systemd"
 
 import (

systemd/systemd_test.go

@@ -2,6 +2,9 @@
 // Use of this source code is governed by the GNU GPL v3
 // license that can be found in the LICENSE file.
 
+//go:build !windows
+// +build !windows
+
 package systemd // import "github.com/wabarc/wayback/systemd"
 
 import (

systemd/systemd_windows.go

@@ -0,0 +1,15 @@
+// Copyright 2021 Wayback Archiver. All rights reserved.
+// Use of this source code is governed by the GNU GPL v3
+// license that can be found in the LICENSE file.
+
+package systemd // import "github.com/wabarc/wayback/systemd"
+
+const SdNotifyReady = "READY=1"
+
+func HasNotifySocket() bool {
+	return false
+}
+
+func SdNotify(state string) error {
+	return nil
+}