func tagReferenceToTagEvent(stream *api.ImageStream, tagRef api.TagReference, tagOrID string) (*api.TagEvent, error) {
switch tagRef.From.Kind {
case "DockerImage":
return &api.TagEvent{
Created: util.Now(),
DockerImageReference: tagRef.From.Name,
}, nil
case "ImageStreamImage":
ref, err := api.DockerImageReferenceForStream(stream)
if err != nil {
return nil, err
}
resolvedIDs := api.ResolveImageID(stream, tagOrID)
switch len(resolvedIDs) {
case 1:
ref.ID = resolvedIDs.List()[0]
return &api.TagEvent{
Created: util.Now(),
DockerImageReference: ref.String(),
Image: ref.ID,
}, nil
case 0:
return nil, fmt.Errorf("no images match the prefix %q", tagOrID)
default:
return nil, fmt.Errorf("multiple images match the prefix %q: %s", tagOrID, strings.Join(resolvedIDs.List(), ", "))
}
case "ImageStreamTag":
return api.LatestTaggedImage(stream, tagOrID), nil
default:
return nil, fmt.Errorf("invalid from.kind %q: it must be ImageStreamImage or ImageStreamTag", tagRef.From.Kind)
}
}
// resolveImageStreamReference looks up the ImageStream[Tag/Image] and converts it to a
// docker pull spec that can be used in an Image field.
func (g *BuildGenerator) resolveImageStreamReference(ctx kapi.Context, from *kapi.ObjectReference, defaultNamespace string) (string, error) {
var namespace string
if len(from.Namespace) != 0 {
namespace = from.Namespace
} else {
namespace = defaultNamespace
}
glog.V(4).Infof("Resolving ImageStreamReference %s of Kind %s in namespace %s", from.Name, from.Kind, namespace)
switch from.Kind {
case "ImageStream":
// NOTE: The 'ImageStream' reference should be used only for the 'output' image
is, err := g.Client.GetImageStream(kapi.WithNamespace(ctx, namespace), from.Name)
if err != nil {
glog.V(2).Infof("Error getting ImageStream %s/%s: %v", namespace, from.Name, err)
return "", err
}
image, err := imageapi.DockerImageReferenceForStream(is)
if err != nil {
glog.V(2).Infof("Error resolving Docker image reference for %s/%s: %v", namespace, from.Name, err)
return "", err
}
return image.String(), nil
case "ImageStreamImage":
imageStreamImage, err := g.Client.GetImageStreamImage(kapi.WithNamespace(ctx, namespace), from.Name)
if err != nil {
glog.V(2).Infof("Error ImageStreamReference %s in namespace %s: %v", from.Name, namespace, err)
if errors.IsNotFound(err) {
return "", err
}
return "", fatalError{err}
}
image := imageStreamImage.Image
glog.V(4).Infof("Resolved ImageStreamReference %s to image %s with reference %s in namespace %s", from.Name, image.Name, image.DockerImageReference, namespace)
return image.DockerImageReference, nil
case "ImageStreamTag":
imageStreamTag, err := g.Client.GetImageStreamTag(kapi.WithNamespace(ctx, namespace), from.Name)
if err != nil {
glog.V(2).Infof("Error resolving ImageStreamTag reference %s in namespace %s: %v", from.Name, namespace, err)
if errors.IsNotFound(err) {
return "", err
}
return "", fatalError{err}
}
image := imageStreamTag.Image
glog.V(4).Infof("Resolved ImageStreamTag %s to image %s with reference %s in namespace %s", from.Name, image.Name, image.DockerImageReference, namespace)
return image.DockerImageReference, nil
case "DockerImage":
return from.Name, nil
default:
return "", fatalError{fmt.Errorf("Unknown From Kind %s", from.Kind)}
}
}