chore: import upstream snapshot with attribution

pkg/writer/writer.go

@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 writer
+
+import (
+	"bufio"
+	"os"
+)
+
+// ReplaceFile remove old file and write new file
+func ReplaceFile(filePath, content string) error {
+	_ = os.Remove(filePath)
+	return WriteFile(filePath, content)
+}
+
+// WriteFile write file to path
+func WriteFile(filePath, content string) error {
+	file, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0o666)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = file.Close()
+	}()
+	writer := bufio.NewWriter(file)
+	if _, err := writer.WriteString(content); err != nil {
+		return err
+	}
+	if err := writer.Flush(); err != nil {
+		return err
+	}
+	return nil
+}
+
+// MoveFile move file to new path
+func MoveFile(oldPath, newPath string) error {
+	return os.Rename(oldPath, newPath)
+}