Is it possible to extract a tar.xz package in golang?

Question

Is it possible to extract a tar.xz package in golang? My understanding is it's possible to use the library for tar and sending it to an xz go library.

Answer 1

I recently created an XZ decompression package so it is now possible to extract a tar.xz using only Go code.

The following code extracts the file myfile.tar.xz to the current directory:

package main

import (
    "archive/tar"
    "fmt"
    "io"
    "log"
    "os"

    "github.com/xi2/xz"
)

func main() {
    // Open a file
    f, err := os.Open("myfile.tar.xz")
    if err != nil {
        log.Fatal(err)
    }
    // Create an xz Reader
    r, err := xz.NewReader(f, 0)
    if err != nil {
        log.Fatal(err)
    }
    // Create a tar Reader
    tr := tar.NewReader(r)
    // Iterate through the files in the archive.
    for {
        hdr, err := tr.Next()
        if err == io.EOF {
            // end of tar archive
            break
        }
        if err != nil {
            log.Fatal(err)
        }
        switch hdr.Typeflag {
        case tar.TypeDir:
            // create a directory
            fmt.Println("creating:   " + hdr.Name)
            err = os.MkdirAll(hdr.Name, 0777)
            if err != nil {
                log.Fatal(err)
            }
        case tar.TypeReg, tar.TypeRegA:
            // write a file
            fmt.Println("extracting: " + hdr.Name)
            w, err := os.Create(hdr.Name)
            if err != nil {
                log.Fatal(err)
            }
            _, err = io.Copy(w, tr)
            if err != nil {
                log.Fatal(err)
            }
            w.Close()
        }
    }
    f.Close()
}