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package archive
import (
"archive/tar"
fp "path/filepath"
"compress/gzip"
"io"
"os"
)
type Unarchive struct {
Input string
tarReader *tar.Reader
}
// Extracts a tar arcive to the current working directory
// This will overwrite everything. So be careful
func (u *Unarchive) UnTar(compressionType string) error {
f, err := os.Open(u.Input)
if err != nil {
return err
}
defer f.Close()
var treader *tar.Reader
switch compressionType {
case "gz":
gzreader, err := gzip.NewReader(f)
if err != nil {
return err
}
// Read from the gzip reader instead of the file
treader = tar.NewReader(gzreader)
default:
// Read from the file directly
treader = tar.NewReader(f)
}
for {
hdr, err := treader.Next()
if err == io.EOF {
// We've reached the end! Whoee
break
}
if err != nil {
return err
}
info := hdr.FileInfo()
if info.IsDir() {
if err = os.MkdirAll(hdr.Name, info.Mode()); err != nil {
return err
}
continue
}
if err = os.MkdirAll(fp.Dir(hdr.Name), info.Mode()); err != nil {
return err
}
// Create a file handle to work with
// f, err := os.Create(hdr.Name)
f, err := os.OpenFile(hdr.Name, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
if err != nil {
return err
}
defer f.Close()
if _, err := io.Copy(f, treader); err != nil {
return err
}
}
return nil
}
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