Implement auto cert reloading (#5963)

pkg/certs/event.go

@@ -0,0 +1,31 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package certs
+
+import (
+	"github.com/rjeczalik/notify"
+)
+
+// isWriteEvent checks if the event returned is a write event
+func isWriteEvent(event notify.Event) bool {
+	for _, ev := range eventWrite {
+		if event&ev != 0 {
+			return true
+		}
+	}
+	return false
+}