Add Reference and Selector types

These will be used for cross resource references, though they could also be used
in other contexts.

Signed-off-by: Nic Cope <negz@rk0n.org>

apis/core/v1alpha1/resource.go

@@ -83,6 +83,12 @@ type SecretKeySelector struct {
 	Key string `json:"key"`
 }
 
+// A Reference to a named object.
+type Reference struct {
+	// Name of the referenced object.
+	Name string `json:"name"`
+}
+
 // A TypedReference refers to an object by Name, Kind, and APIVersion. It is
 // commonly used to reference cluster-scoped objects or objects where the
 // namespace is already known.
@@ -101,6 +107,16 @@ type TypedReference struct {
 	UID types.UID `json:"uid,omitempty"`
 }
 
+// A Selector selects an object.
+type Selector struct {
+	// MatchLabels ensures an object with matching labels is selected.
+	MatchLabels map[string]string `json:"matchLabels,omitempty"`
+
+	// MatchControllerRef ensures an object with the same controller reference
+	// as the selecting object is selected.
+	MatchControllerRef *bool `json:"matchControllerRef,omitempty"`
+}
+
 // SetGroupVersionKind sets the Kind and APIVersion of a TypedReference.
 func (obj *TypedReference) SetGroupVersionKind(gvk schema.GroupVersionKind) {
 	obj.APIVersion, obj.Kind = gvk.ToAPIVersionAndKind()

apis/core/v1alpha1/zz_generated.deepcopy.go

@@ -133,6 +133,21 @@ func (in *ProviderSpec) DeepCopy() *ProviderSpec {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Reference) DeepCopyInto(out *Reference) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Reference.
+func (in *Reference) DeepCopy() *Reference {
+	if in == nil {
+		return nil
+	}
+	out := new(Reference)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *ResourceClaimSpec) DeepCopyInto(out *ResourceClaimSpec) {
 	*out = *in
@@ -268,6 +283,33 @@ func (in *SecretReference) DeepCopy() *SecretReference {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Selector) DeepCopyInto(out *Selector) {
+	*out = *in
+	if in.MatchLabels != nil {
+		in, out := &in.MatchLabels, &out.MatchLabels
+		*out = make(map[string]string, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+	}
+	if in.MatchControllerRef != nil {
+		in, out := &in.MatchControllerRef, &out.MatchControllerRef
+		*out = new(bool)
+		**out = **in
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Selector.
+func (in *Selector) DeepCopy() *Selector {
+	if in == nil {
+		return nil
+	}
+	out := new(Selector)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *TargetSpec) DeepCopyInto(out *TargetSpec) {
 	*out = *in