The symbolic links are not preserved when unpacking a zip (other formats not tested)

[Skywalker13]

See subject

[oaleynik]

Same here. @Skywalker13 did you find solution for this?

[Skywalker13]

Yes but I use archive/zip instead:

package main

import (
	"archive/zip"
	"io"
	"os"
	"path/filepath"
)

// Unzip a file to a destination and preserve the symlinks
// Based on http://stackoverflow.com/a/24792688/842097 with symlink additions
func unzip(src, dest string) error {
	r, err := zip.OpenReader(src)
	if err != nil {
		return err
	}
	defer func() {
		if err := r.Close(); err != nil {
			panic(err)
		}
	}()

	os.MkdirAll(dest, 0755)

	// Closure to address file descriptors issue with all the deferred .Close() methods
	extractAndWriteFile := func(f *zip.File) error {
		rc, err := f.Open()
		if err != nil {
			return err
		}
		defer func() {
			if err := rc.Close(); err != nil {
				panic(err)
			}
		}()

		path := filepath.Join(dest, f.Name)

		if f.FileInfo().IsDir() {
			os.MkdirAll(path, f.Mode())
		} else if f.FileInfo().Mode()&os.ModeSymlink != 0 {
			buffer := make([]byte, f.FileInfo().Size())
			size, err := rc.Read(buffer)
			if err != nil {
				return err
			}

			target := string(buffer[:size])

			err = os.Symlink(target, path)
			if err != nil {
				return err
			}
		} else {
			os.MkdirAll(filepath.Dir(path), f.Mode())
			f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
			if err != nil {
				return err
			}
			defer func() {
				if err = f.Close(); err != nil {
					panic(err)
				}
			}()

			_, err = io.Copy(f, rc)
			if err != nil {
				return err
			}
		}
		return nil
	}

	for _, f := range r.File {
		err := extractAndWriteFile(f)
		if err != nil {
			return err
		}
	}

	return nil
}

[mholt]

Hmmm, want to make a pull request? :D

[oaleynik]

@Skywalker13 really appreciate actual example - saves me a lot of time! If you will have an hour of free time or so, as @mholt said - PR would be awesome! Thanks again!