mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2025-02-03 19:45:36 +00:00
96 lines
2.8 KiB
Go
96 lines
2.8 KiB
Go
/**
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# Copyright 2024 NVIDIA CORPORATION
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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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**/
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package toolkit
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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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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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)
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type fileInstaller struct {
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logger logger.Interface
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// sourceRoot specifies the root that is searched for the components to install.
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sourceRoot string
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}
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// installFileToFolder copies a source file to a destination folder.
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// The path of the input file is ignored.
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// e.g. installFileToFolder("/some/path/file.txt", "/output/path")
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// will result in a file "/output/path/file.txt" being generated
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func (t *fileInstaller) installFileToFolder(destFolder string, src string) (string, error) {
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name := filepath.Base(src)
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return t.installFileToFolderWithName(destFolder, name, src)
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}
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// cp src destFolder/name
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func (t *fileInstaller) installFileToFolderWithName(destFolder string, name, src string) (string, error) {
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dest := filepath.Join(destFolder, name)
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err := t.installFile(dest, src)
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if err != nil {
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return "", fmt.Errorf("error copying '%v' to '%v': %v", src, dest, err)
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}
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return dest, nil
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}
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// installFile copies a file from src to dest and maintains
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// file modes
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func (t *fileInstaller) installFile(dest string, src string) error {
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src = filepath.Join(t.sourceRoot, src)
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t.logger.Infof("Installing '%v' to '%v'", src, dest)
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source, err := os.Open(src)
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if err != nil {
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return fmt.Errorf("error opening source: %v", err)
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}
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defer source.Close()
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destination, err := os.Create(dest)
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if err != nil {
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return fmt.Errorf("error creating destination: %v", err)
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}
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defer destination.Close()
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_, err = io.Copy(destination, source)
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if err != nil {
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return fmt.Errorf("error copying file: %v", err)
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}
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err = applyModeFromSource(dest, src)
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if err != nil {
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return fmt.Errorf("error setting destination file mode: %v", err)
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}
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return nil
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}
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// applyModeFromSource sets the file mode for a destination file
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// to match that of a specified source file
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func applyModeFromSource(dest string, src string) error {
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sourceInfo, err := os.Stat(src)
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if err != nil {
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return fmt.Errorf("error getting file info for '%v': %v", src, err)
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}
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err = os.Chmod(dest, sourceInfo.Mode())
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if err != nil {
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return fmt.Errorf("error setting mode for '%v': %v", dest, err)
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}
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return nil
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}
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