73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package util
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import (
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"io"
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"os"
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"strings"
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"github.com/pkg/errors"
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"k8s.io/klog/v2"
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)
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// CopyFile copies a file from src to dest.
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func CopyFile(src, dest string) error {
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sourceFileInfo, err := os.Stat(src)
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if err != nil {
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return err
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}
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sourceFile, err := os.Open(src)
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if err != nil {
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return err
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}
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defer func() {
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_ = sourceFile.Close()
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}()
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destFile, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, sourceFileInfo.Mode())
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if err != nil {
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return err
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}
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defer func() {
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_ = destFile.Close()
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}()
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_, err = io.Copy(destFile, sourceFile)
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return err
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}
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// MoveFile moves a file from src to dest.
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func MoveFile(src, dest string) error {
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err := os.Rename(src, dest)
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if err != nil && strings.Contains(err.Error(), "invalid cross-device link") {
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// When calling os.Rename(), an "invalid cross-device link" error may occur
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// if the source and destination files are on different file systems.
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// In this case, the file is moved by copying and then deleting the source file,
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// although it is less efficient than os.Rename().
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klog.V(4).Infof("cannot rename %v to %v due to %v, attempting an alternative method", src, dest, err)
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if err := CopyFile(src, dest); err != nil {
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return errors.Wrapf(err, "failed to copy file %v to %v", src, dest)
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}
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return os.Remove(src)
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}
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return err
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}
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