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package archive
import (
"archive/tar"
fp "path/filepath"
"io"
"os"
)
type Unarchive struct {
Input string
inputFile *os.File
tarReader *tar.Reader
}
// Extracts a tar arcive to the current working directory
// This will overwrite everything. So be careful
func (u *Unarchive) UnTar() error {
var err error
u.inputFile, err = os.Open(u.Input)
if err != nil {
return err
}
defer u.inputFile.Close()
u.tarReader = tar.NewReader(u.inputFile)
for {
hdr, err := u.tarReader.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, u.tarReader); err != nil {
return err
}
}
return nil
}
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