mirror of
https://github.com/tickstep/aliyunpan.git
synced 2025-01-23 22:42:15 +08:00
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
// Copyright (c) 2020 tickstep.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package panupdate
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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)
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func update(targetPath string, src io.Reader) error {
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info, err := os.Stat(targetPath)
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if err != nil {
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if os.IsNotExist(err) {
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fmt.Printf("警告: 本地文件不存在 %s\n", targetPath)
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return nil
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}
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fmt.Printf("Warning: %s\n", err)
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return nil
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}
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privMode := info.Mode()
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oldPath := filepath.Join(filepath.Dir(targetPath), "old-"+filepath.Base(targetPath))
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err = os.Rename(targetPath, oldPath)
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if err != nil {
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return err
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}
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newFile, err := os.OpenFile(targetPath, os.O_CREATE|os.O_WRONLY, privMode)
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if err != nil {
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return err
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}
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_, err = io.Copy(newFile, src)
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if err != nil {
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return err
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}
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err = newFile.Close()
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if err != nil {
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fmt.Printf("Warning: 关闭文件发生错误: %s\n", err)
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}
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err = os.Remove(oldPath)
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if err != nil {
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fmt.Printf("Warning: 移除旧文件发生错误: %s\n", err)
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}
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return nil
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}
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