func (s *TagStore) exportImage(name, tempdir string) error {
for n := name; n != ""; {
// temporary directory
tmpImageDir := filepath.Join(tempdir, n)
if err := os.Mkdir(tmpImageDir, os.FileMode(0755)); err != nil {
if os.IsExist(err) {
return nil
}
return err
}
var version = "1.0"
var versionBuf = []byte(version)
if err := ioutil.WriteFile(filepath.Join(tmpImageDir, "VERSION"), versionBuf, os.FileMode(0644)); err != nil {
return err
}
// serialize json
json, err := os.Create(filepath.Join(tmpImageDir, "json"))
if err != nil {
return err
}
img, err := s.LookupImage(n)
if err != nil || img == nil {
return fmt.Errorf("No such image %s", n)
}
imageInspectRaw, err := s.graph.RawJSON(img.ID)
if err != nil {
return err
}
written, err := json.Write(imageInspectRaw)
if err != nil {
return err
}
if written != len(imageInspectRaw) {
logrus.Warnf("%d byes should have been written instead %d have been written", written, len(imageInspectRaw))
}
// serialize filesystem
fsTar, err := os.Create(filepath.Join(tmpImageDir, "layer.tar"))
if err != nil {
return err
}
if err := s.ImageTarLayer(n, fsTar); err != nil {
return err
}
for _, fname := range []string{"", "VERSION", "json", "layer.tar"} {
if err := os.Chtimes(filepath.Join(tmpImageDir, fname), img.Created, img.Created); err != nil {
return err
}
}
// try again with parent
n = img.Parent
}
return nil
}
func (s *TagStore) exportImage(name, tempdir string) error {
for n := name; n != ""; {
// temporary directory
tmpImageDir := filepath.Join(tempdir, n)
if err := os.Mkdir(tmpImageDir, os.FileMode(0755)); err != nil {
if os.IsExist(err) {
return nil
}
return err
}
var version = "1.0"
var versionBuf = []byte(version)
if err := ioutil.WriteFile(filepath.Join(tmpImageDir, "VERSION"), versionBuf, os.FileMode(0644)); err != nil {
return err
}
// serialize json
json, err := os.Create(filepath.Join(tmpImageDir, "json"))
if err != nil {
return err
}
imageInspectRaw, err := s.lookupRaw(n)
if err != nil {
return err
}
written, err := json.Write(imageInspectRaw)
if err != nil {
return err
}
if written != len(imageInspectRaw) {
logrus.Warnf("%d byes should have been written instead %d have been written", written, len(imageInspectRaw))
}
// serialize filesystem
fsTar, err := os.Create(filepath.Join(tmpImageDir, "layer.tar"))
if err != nil {
return err
}
if err := s.ImageTarLayer(n, fsTar); err != nil {
return err
}
// find parent
img, err := s.LookupImage(n)
if err != nil {
return err
}
n = img.Parent
}
return nil
}