github.com/kristinjeanna/archive

Package archive is a convenience package for walking/enumerating the contents of zip files, tar files, and compressed tar files through callback functions. Supported archive types include: zip, tar, gzip-compressed tar, bzip2-compressed tar, and xz-compressed tar.

• Install
• Examples
  • List the contents of a .zip file
  • Extract the contents of a .tar.xz file
  • Determine the type of archive file
• Credits

Install

go get github.com/kristinjeanna/archive

Examples

List the contents of a .zip file

func zipCallback(file *zip.File) error {
    if file.FileInfo().IsDir() {
        fmt.Printf("Dir : %s\n", file.Name)
    } else  {
        fmt.Printf("File: %s\n", file.Name)
    }

    return nil
}

func main() {
    err := archive.WalkZip("test.zip", zipCallback)
    if err != nil {
        log.Fatal(err)
    }
}

Extract the contents of a .tar.xz file

func tarCallback(reader *tar.Reader, header *tar.Header) error {
    if header.FileInfo().IsDir() {
        os.MkdirAll(header.Name, 0700)
        return nil
    }

    fo, err := os.Create(header.Name)
    if err != nil {
        return err
    }
    defer fo.Close()

    _, err := io.Copy(fo, reader)
    if err != nil {
        return err
    }

    return nil
}

func main() {
    err := archive.WalkTarXz("test.tar.xz", tarCallback)
    if err != nil {
        log.Fatal(err)
    }
}

Determine the type of archive file

func main() {
    archiveType, err := archive.DetermineType(archiveFilename)
    if err != nil {
        fmt.Fprintln(os.Stderr, "Unable to determine the file's archive type.")
        os.Exit(1)
    }

    switch archiveType {
    case archive.Tar:
        err = archive.WalkTar(archiveFilename, tarCallback)
    case archive.TarBz2:
        err = archive.WalkTarBzip2(archiveFilename, tarCallback)
    case archive.TarGz:
        err = archive.WalkTarGz(archiveFilename, tarCallback)
    case archive.TarXz:
        err = archive.WalkTarXz(archiveFilename, tarCallback)
    case archive.Zip:
        err = archive.WalkZip(archiveFilename, zipCallback)
    }

    if err != nil {
        log.Fatal(err)
    }
}

Credits

• XZ compression support via github.com/ulikunitz/xz