func verboseName(name reference.Named) string {
name = reference.WithDefaultTag(name)
tag := ""
if tagged, ok := name.(reference.NamedTagged); ok {
tag = tagged.Tag()
}
return name.FullName() + ":" + tag
}
// ParseStoreReference takes a name or an ID, tries to figure out which it is
// relative to the given store, and returns it in a reference object.
func (s storageTransport) ParseStoreReference(store storage.Store, ref string) (*storageReference, error) {
var name reference.Named
var sum digest.Digest
var err error
if ref == "" {
return nil, ErrInvalidReference
}
if ref[0] == '[' {
// Ignore the store specifier.
closeIndex := strings.IndexRune(ref, ']')
if closeIndex < 1 {
return nil, ErrInvalidReference
}
ref = ref[closeIndex+1:]
}
refInfo := strings.SplitN(ref, "@", 2)
if len(refInfo) == 1 {
// A name.
name, err = reference.ParseNamed(refInfo[0])
if err != nil {
return nil, err
}
} else if len(refInfo) == 2 {
// An ID, possibly preceded by a name.
if refInfo[0] != "" {
name, err = reference.ParseNamed(refInfo[0])
if err != nil {
return nil, err
}
}
sum, err = digest.Parse("sha256:" + refInfo[1])
if err != nil {
return nil, err
}
} else { // Coverage: len(refInfo) is always 1 or 2
// Anything else: store specified in a form we don't
// recognize.
return nil, ErrInvalidReference
}
storeSpec := "[" + store.GetGraphDriverName() + "@" + store.GetGraphRoot() + "]"
id := ""
if sum.Validate() == nil {
id = sum.Hex()
}
refname := ""
if name != nil {
name = reference.WithDefaultTag(name)
refname = verboseName(name)
}
if refname == "" {
logrus.Debugf("parsed reference into %q", storeSpec+"@"+id)
} else if id == "" {
logrus.Debugf("parsed reference into %q", storeSpec+refname)
} else {
logrus.Debugf("parsed reference into %q", storeSpec+refname+"@"+id)
}
return newReference(storageTransport{store: store}, refname, id, name), nil
}
// ParseReference converts a string, which should not start with the ImageTransport.Name prefix, into an Docker ImageReference.
func ParseReference(refString string) (types.ImageReference, error) {
if !strings.HasPrefix(refString, "//") {
return nil, errors.Errorf("docker: image reference %s does not start with //", refString)
}
ref, err := reference.ParseNamed(strings.TrimPrefix(refString, "//"))
if err != nil {
return nil, err
}
ref = reference.WithDefaultTag(ref)
return NewReference(ref)
}