func Unpack(repo, dir, hash string) error {
db, err := libpack.Init(repo, hash)
if err != nil {
return err
}
r, w := io.Pipe()
var (
inErr error
outErr error
)
var tasks sync.WaitGroup
tasks.Add(2)
go func() {
inErr = db.GetTar(os.Stdout)
w.Close()
tasks.Done()
}()
go func() {
outErr = archive.Untar(r, dir, &archive.TarOptions{})
tasks.Done()
}()
tasks.Wait()
if inErr != nil {
return fmt.Errorf("git2tar: %v", inErr)
}
if outErr != nil {
return fmt.Errorf("untar: %v", outErr)
}
return nil
}
func Pack(repo, dir, branch string) (hash string, err error) {
db, err := libpack.Init(repo, branch)
if err != nil {
return "", err
}
a, err := archive.TarWithOptions(dir, &archive.TarOptions{Excludes: []string{".git"}})
if err != nil {
return "", err
}
if err := db.SetTar(a); err != nil {
return "", err
}
if err := db.Commit("imported tar filesystem tree"); err != nil {
return "", err
}
head := db.Head()
if head != nil {
hash = head.String()
}
return
}