130 lines
2.6 KiB
Go
130 lines
2.6 KiB
Go
/*
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* Copyright 2026 Oleg Borodin <onborodin@gmail.com>
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*
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* This work is published and licensed under a Creative Commons
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* Attribution-NonCommercial-NoDerivatives 4.0 International License.
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*
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* Distribution of this work is permitted, but commercial use and
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* modifications are strictly prohibited.
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*/
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package auxutar
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import (
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"archive/tar"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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// TODO: file and dir modes
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func Archive(srcdir, dstpath string) error {
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var err error
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srcdir = filepath.Clean(srcdir)
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dstpath = filepath.Clean(dstpath)
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err = os.MkdirAll(filepath.Dir(dstpath), 0755)
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if err != nil {
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return err
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}
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tarFile, err := os.OpenFile(dstpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
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if err != nil {
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return err
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}
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defer tarFile.Close()
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tarWriter := tar.NewWriter(tarFile)
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defer tarWriter.Close()
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walker := func(filename string, fileInfo os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if !fileInfo.Mode().IsRegular() {
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return nil
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}
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header, err := tar.FileInfoHeader(fileInfo, fileInfo.Name())
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if err != nil {
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return err
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}
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header.Name = strings.TrimPrefix(filename, filepath.Clean(srcdir))
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header.Name = strings.TrimPrefix(header.Name, string(filepath.Separator))
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err = tarWriter.WriteHeader(header)
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if err != nil {
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return err
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}
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file, err := os.Open(filename)
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if err != nil {
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return err
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}
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defer file.Close()
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_, err = io.Copy(tarWriter, file)
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if err != nil {
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return err
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}
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return nil
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}
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err = filepath.Walk(srcdir, walker)
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if err != nil {
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return err
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}
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return err
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}
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func Unarchive(filename, dstdir string) error {
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var err error
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err = os.MkdirAll(dstdir, 0755)
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if err != nil {
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return err
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}
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file, err := os.OpenFile(filename, os.O_RDONLY, 0)
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if err != nil {
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return err
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}
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defer file.Close()
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tarReader := tar.NewReader(file)
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for {
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header, err := tarReader.Next()
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switch {
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case err == io.EOF:
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return nil
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case err != nil:
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return err
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case header == nil:
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continue
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}
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target := filepath.Join(dstdir, header.Name)
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target = filepath.Clean(target)
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//fileInfo := header.FileInfo()
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switch header.Typeflag {
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case tar.TypeDir:
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_, err := os.Stat(target)
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if err != nil {
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err := os.MkdirAll(target, 0755)
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if err != nil {
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return err
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}
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}
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case tar.TypeReg:
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err := os.MkdirAll(filepath.Dir(target), 0755)
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if err != nil {
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return err
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}
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file, err := os.OpenFile(target, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.FileMode(header.Mode))
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if err != nil {
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return err
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}
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_, err = io.Copy(file, tarReader)
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if err != nil {
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return err
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}
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file.Close()
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}
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}
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return err
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}
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