// FindAllCanonicalResources returns all resource names that map directly to their kind (Kind -> Resource -> Kind)
// and are not subresources. This is the closest mapping possible from the client side to resources that can be
// listed and updated. Note that this may return some virtual resources (like imagestreamtags) that can be otherwise
// represented.
// TODO: add a field to APIResources for "virtual" (or that points to the canonical resource).
// TODO: fallback to the scheme when discovery is not possible.
func FindAllCanonicalResources(d discovery.DiscoveryInterface, m meta.RESTMapper) ([]unversioned.GroupResource, error) {
set := make(map[unversioned.GroupResource]struct{})
all, err := d.ServerResources()
if err != nil {
return nil, err
}
for apiVersion, v := range all {
gv, err := unversioned.ParseGroupVersion(apiVersion)
if err != nil {
continue
}
for _, r := range v.APIResources {
// ignore subresources
if strings.Contains(r.Name, "/") {
continue
}
// because discovery info doesn't tell us whether the object is virtual or not, perform a lookup
// by the kind for resource (which should be the canonical resource) and then verify that the reverse
// lookup (KindsFor) does not error.
if mapping, err := m.RESTMapping(unversioned.GroupKind{Group: gv.Group, Kind: r.Kind}, gv.Version); err == nil {
if _, err := m.KindsFor(mapping.GroupVersionKind.GroupVersion().WithResource(mapping.Resource)); err == nil {
set[unversioned.GroupResource{Group: mapping.GroupVersionKind.Group, Resource: mapping.Resource}] = struct{}{}
}
}
}
}
var groupResources []unversioned.GroupResource
for k := range set {
groupResources = append(groupResources, k)
}
sort.Sort(groupResourcesByName(groupResources))
return groupResources, nil
}
// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource unversioned.GroupResource, resourceString string, mapper meta.RESTMapper) (unversioned.GroupResource, string, error) {
if mapper == nil {
return unversioned.GroupResource{}, "", errors.New("mapper cannot be nil")
}
var name string
parts := strings.Split(resourceString, "/")
switch len(parts) {
case 1:
name = parts[0]
case 2:
name = parts[1]
// Allow specifying the group the same way kubectl does, as "resource.group.name"
groupResource := unversioned.ParseGroupResource(parts[0])
// normalize resource case
groupResource.Resource = strings.ToLower(groupResource.Resource)
gvr, err := mapper.ResourceFor(groupResource.WithVersion(""))
if err != nil {
return unversioned.GroupResource{}, "", err
}
return gvr.GroupResource(), name, nil
default:
return unversioned.GroupResource{}, "", fmt.Errorf("invalid resource format: %s", resourceString)
}
return defaultResource, name, nil
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action FakeAction) (runtime.Object, error) {
segments := strings.Split(action.Action, "-")
var verb, resource string
switch len(segments) {
case 3:
verb, _, resource = segments[0], segments[1], segments[2]
case 2:
verb, resource = segments[0], segments[1]
default:
return nil, fmt.Errorf("unrecognized action, need two or three segments <verb>-<resource> or <verb>-<subresource>-<resource>: %s", action.Action)
}
_, kind, err := mapper.VersionAndKindForResource(resource)
if err != nil {
return nil, fmt.Errorf("unrecognized action %s: %v", resource, err)
}
// TODO: have mapper return a Kind for a subresource?
switch verb {
case "list", "search":
return o.Kind(kind+"List", "")
case "get", "create", "update", "delete":
// TODO: handle sub resources
if s, ok := action.Value.(string); ok && action.Value != nil {
return o.Kind(kind, s)
}
return o.Kind(kind, "unknown")
default:
return nil, fmt.Errorf("no reaction implemented for %s", action.Action)
}
return nil, nil
}
}
// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource, resourceString string, mapper meta.RESTMapper) (string, string, error) {
if mapper == nil {
return "", "", errors.New("mapper cannot be nil")
}
var name string
parts := strings.Split(resourceString, "/")
switch len(parts) {
case 1:
name = parts[0]
case 2:
partialResource := unversioned.GroupVersionResource{Resource: parts[0]}
gvrs, err := mapper.ResourcesFor(partialResource)
if err != nil {
return "", "", err
}
if len(gvrs) == 0 {
return gvrs[0].Resource, parts[1], nil
}
groupResource := gvrs[0].GroupResource()
for _, gvr := range gvrs[1:] {
if groupResource != gvr.GroupResource() {
return "", "", &meta.AmbiguousResourceError{PartialResource: partialResource, MatchingResources: gvrs}
}
}
return gvrs[0].Resource, parts[1], nil
default:
return "", "", fmt.Errorf("invalid resource format: %s", resourceString)
}
return defaultResource, name, nil
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (runtime.Object, error) {
_, kind, err := mapper.VersionAndKindForResource(action.GetResource())
if err != nil {
return nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
return o.Kind(kind+"List", "")
case GetAction:
return o.Kind(kind, castAction.GetName())
case DeleteAction:
return o.Kind(kind, castAction.GetName())
case CreateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return nil, err
}
return o.Kind(kind, meta.Name)
case UpdateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return nil, err
}
return o.Kind(kind, meta.Name)
default:
return nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
resource := action.GetResource()
kind, err := mapper.KindFor(resource)
// This is a temporary fix. Because there is no internal resource, so
// the caller has no way to express that it expects to get an internal
// kind back. A more proper fix will be directly specify the Kind when
// build the action.
kind.Version = resource.Version
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
kind.Kind += "List"
resource, err := o.Kind(kind, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case CreateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
case UpdateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
func resourceFor(mapper meta.RESTMapper, resourceArg string) unversioned.GroupVersionResource {
fullySpecifiedGVR, groupResource := unversioned.ParseResourceArg(strings.ToLower(resourceArg))
gvr := unversioned.GroupVersionResource{}
if fullySpecifiedGVR != nil {
gvr, _ = mapper.ResourceFor(*fullySpecifiedGVR)
}
if gvr.IsEmpty() {
var err error
gvr, err = mapper.ResourceFor(groupResource.WithVersion(""))
if err != nil {
return unversioned.GroupVersionResource{Resource: resourceArg}
}
}
return gvr
}
// PrintObject prints an api object given command line flags to modify the output format
func (f *Factory) PrintObject(cmd *cobra.Command, mapper meta.RESTMapper, obj runtime.Object, out io.Writer) error {
gvk, err := api.Scheme.ObjectKind(obj)
if err != nil {
return err
}
mapping, err := mapper.RESTMapping(gvk.GroupKind())
if err != nil {
return err
}
printer, err := f.PrinterForMapping(cmd, mapping, false)
if err != nil {
return err
}
return printer.PrintObj(obj, out)
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
gvk, err := mapper.KindFor(action.GetResource())
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
gvk.Kind += "List"
resource, err := o.Kind(gvk, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(gvk, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(gvk, castAction.GetName())
return true, resource, err
case CreateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(gvk, meta.Name)
return true, resource, err
case UpdateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(gvk, meta.Name)
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
return true, nil, nil
}
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
kind, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: action.GetResource()})
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
kind.Kind += "List"
resource, err := o.Kind(kind, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case CreateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
case UpdateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
return true, nil, nil
}
}
// PrintSuccess prints message after finishing mutating operations
func PrintSuccess(mapper meta.RESTMapper, shortOutput bool, out io.Writer, resource string, name string, operation string) {
resource, _ = mapper.ResourceSingularizer(resource)
if shortOutput {
// -o name: prints resource/name
if len(resource) > 0 {
fmt.Fprintf(out, "%s/%s\n", resource, name)
} else {
fmt.Fprintf(out, "%s\n", name)
}
} else {
// understandable output by default
if len(resource) > 0 {
fmt.Fprintf(out, "%s \"%s\" %s\n", resource, name, operation)
} else {
fmt.Fprintf(out, "\"%s\" %s\n", name, operation)
}
}
}
// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource, resourceString string, mapper meta.RESTMapper) (string, string, error) {
if mapper == nil {
return "", "", errors.New("mapper cannot be nil")
}
var name string
parts := strings.Split(resourceString, "/")
switch len(parts) {
case 1:
name = parts[0]
case 2:
gvk, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: parts[0]})
if err != nil {
return "", "", err
}
name = parts[1]
resource, _ := meta.KindToResource(gvk, false)
return resource.Resource, name, nil
default:
return "", "", fmt.Errorf("invalid resource format: %s", resourceString)
}
return defaultResource, name, nil
}
// ObjectReaction returns a ReactionFunc that applies core.Action to
// the given tracker.
func ObjectReaction(tracker ObjectTracker, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
ns := action.GetNamespace()
gvr := action.GetResource()
gvk, err := mapper.KindFor(gvr)
if err != nil {
return false, nil, fmt.Errorf("error getting kind for resource %q: %s", gvr, err)
}
// This is a temporary fix. Because there is no internal resource, so
// the caller has no way to express that it expects to get an internal
// kind back. A more proper fix will be directly specify the Kind when
// build the action.
gvk.Version = gvr.Version
if len(gvk.Version) == 0 {
gvk.Version = runtime.APIVersionInternal
}
// Here and below we need to switch on implementation types,
// not on interfaces, as some interfaces are identical
// (e.g. UpdateAction and CreateAction), so if we use them,
// updates and creates end up matching the same case branch.
switch action := action.(type) {
case ListActionImpl:
obj, err := tracker.List(gvk, ns)
return true, obj, err
case GetActionImpl:
obj, err := tracker.Get(gvk, ns, action.GetName())
return true, obj, err
case CreateActionImpl:
objMeta, err := meta.Accessor(action.GetObject())
if err != nil {
return true, nil, err
}
if action.GetSubresource() == "" {
err = tracker.Create(action.GetObject(), ns)
} else {
// TODO: Currently we're handling subresource creation as an update
// on the enclosing resource. This works for some subresources but
// might not be generic enough.
err = tracker.Update(action.GetObject(), ns)
}
if err != nil {
return true, nil, err
}
obj, err := tracker.Get(gvk, ns, objMeta.GetName())
return true, obj, err
case UpdateActionImpl:
objMeta, err := meta.Accessor(action.GetObject())
if err != nil {
return true, nil, err
}
err = tracker.Update(action.GetObject(), ns)
if err != nil {
return true, nil, err
}
obj, err := tracker.Get(gvk, ns, objMeta.GetName())
return true, obj, err
case DeleteActionImpl:
err := tracker.Delete(gvk, ns, action.GetName())
if err != nil {
return true, nil, err
}
return true, nil, nil
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
// SplitAndParseResourceRequest separates the users input into a model and fields
func SplitAndParseResourceRequest(inResource string, mapper meta.RESTMapper) (string, []string, error) {
inResource, fieldsPath := splitDotNotation(inResource)
inResource, _ = mapper.ResourceSingularizer(expandResourceShortcut(inResource))
return inResource, fieldsPath, nil
}
