mirror of https://github.com/k3s-io/k3s
138 lines
3.2 KiB
Go
138 lines
3.2 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 archive
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import (
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"archive/zip"
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"bytes"
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"fmt"
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"io"
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"os"
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"path"
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"path/filepath"
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)
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// ZipWalker returns a filepath.WalkFunc that adds every filesystem node
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// to the given *zip.Writer.
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func ZipWalker(zw *zip.Writer) filepath.WalkFunc {
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var base string
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return func(path string, info os.FileInfo, err error) error {
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if base == "" {
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base = path
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}
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header, err := zip.FileInfoHeader(info)
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if err != nil {
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return err
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}
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if header.Name, err = filepath.Rel(base, path); err != nil {
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return err
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} else if info.IsDir() {
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header.Name = header.Name + string(filepath.Separator)
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} else {
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header.Method = zip.Deflate
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}
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w, err := zw.CreateHeader(header)
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if err != nil {
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return err
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}
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if info.IsDir() {
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return nil
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}
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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_, err = io.Copy(w, f)
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f.Close()
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return err
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}
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}
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// Create a zip of all files in a directory recursively, return a byte array and
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// the number of files archived.
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func ZipDir(path string) ([]byte, []string, error) {
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var buf bytes.Buffer
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zw := zip.NewWriter(&buf)
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zipWalker := ZipWalker(zw)
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paths := []string{}
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err := filepath.Walk(path, filepath.WalkFunc(func(path string, info os.FileInfo, err error) error {
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if !info.IsDir() {
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paths = append(paths, path)
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}
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return zipWalker(path, info, err)
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}))
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if err != nil {
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return nil, nil, err
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} else if err = zw.Close(); err != nil {
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return nil, nil, err
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}
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return buf.Bytes(), paths, nil
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}
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// UnzipDir unzips all files from a given zip byte array into a given directory.
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// The directory is created if it does not exist yet.
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func UnzipDir(data []byte, destPath string) error {
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// open zip
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zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
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if err != nil {
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return fmt.Errorf("Unzip archive read error: %v", err)
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}
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for _, file := range zr.File {
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// skip directories
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if file.FileInfo().IsDir() {
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continue
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}
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// open file
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rc, err := file.Open()
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defer rc.Close()
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if err != nil {
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return fmt.Errorf("Unzip file read error: %v", err)
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}
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// make sure the directory of the file exists, otherwise create
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destPath := filepath.Clean(filepath.Join(destPath, file.Name))
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destBasedir := path.Dir(destPath)
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err = os.MkdirAll(destBasedir, 0755)
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if err != nil {
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return fmt.Errorf("Unzip mkdir error: %v", err)
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}
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// create file
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f, err := os.Create(destPath)
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if err != nil {
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return fmt.Errorf("Unzip file creation error: %v", err)
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}
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defer f.Close()
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// write file
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if _, err := io.Copy(f, rc); err != nil {
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return fmt.Errorf("Unzip file write error: %v", err)
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}
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}
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return nil
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}
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