Add cli support for unsharing a node from a namespace.

sharing.go

@@ -40,6 +40,30 @@ func (h *Headscale) AddSharedMachineToNamespace(m *Machine, ns *Namespace) error
 	return nil
 }
 
+// RemoveSharedMachineFromNamespace removes a shared machine from a namespace
+func (h *Headscale) RemoveSharedMachineFromNamespace(m *Machine, ns *Namespace) error {
+	if m.NamespaceID == ns.ID {
+		return errorSameNamespace
+	}
+
+	sharedMachine := SharedMachine{}
+	result := h.db.Where("machine_id = ? AND namespace_id = ?", m.ID, ns.ID).Unscoped().Delete(&sharedMachine)
+	if result.Error != nil {
+		return result.Error
+	}
+
+	if result.RowsAffected == 0 {
+		return errorMachineNotShared
+	}
+
+	err := h.RequestMapUpdates(ns.ID)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // RemoveSharedMachineFromAllNamespaces removes a machine as a shared node from all namespaces
 func (h *Headscale) RemoveSharedMachineFromAllNamespaces(m *Machine) error {
 	sharedMachine := SharedMachine{}