docker/docker_transport.go
func (ref dockerReference) tagOrDigest() (string, error) {
	if ref, ok := ref.ref.(reference.Canonical); ok {
		return ref.Digest().String(), nil
	}
	if ref, ok := ref.ref.(reference.NamedTagged); ok {
		return ref.Tag(), nil
	}
	// This should not happen, NewReference above refuses reference.IsNameOnly values.
	return "", errors.Errorf("Internal inconsistency: Reference %s unexpectedly has neither a digest nor a tag", reference.FamiliarString(ref.ref))
}
func (ref dockerReference) tagOrDigest() (string, error) {
	if ref, ok := ref.ref.(reference.Canonical); ok {
		return ref.Digest().String(), nil
	}
	if ref, ok := ref.ref.(reference.NamedTagged); ok {
		return ref.Tag(), nil
	}
	// This should not happen, NewReference above refuses reference.IsNameOnly values.
	return "", errors.Errorf("Internal inconsistency: Reference %s unexpectedly has neither a digest nor a tag", reference.FamiliarString(ref.ref))
}
func ( ref dockerReference ) tagOrDigest ( ) ( string , error ) { if ref , ok := ref . ref . ( reference . Canonical ) ; ok { return ref . Digest ( ) . String ( ) , nil } if ref , ok := ref . ref . ( reference . NamedTagged ) ; ok { return ref . Tag ( ) , nil } // This should not happen, NewReference above refuses reference.IsNameOnly values. return " " , errors . Errorf ( " " , reference . FamiliarString ( ref . ref ) ) }
// tagOrDigest returns a tag or digest from the reference.
tagOrDigest returns a tag or digest from the reference .