WIP

Signed-off-by: Grant Griffiths <ggriffiths@purestorage.com>

pkg/utils/patch.go

@@ -0,0 +1,58 @@
+package utils
+
+import (
+	"context"
+	"encoding/json"
+
+	crdv1 "github.com/kubernetes-csi/external-snapshotter/client/v4/apis/volumesnapshot/v1"
+	clientset "github.com/kubernetes-csi/external-snapshotter/client/v4/clientset/versioned"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+// PatchOp represents a json patch operation
+type PatchOp struct {
+	Op    string      `json:"op"`
+	Path  string      `json:"path"`
+	Value interface{} `json:"value,omitempty"`
+}
+
+// PatchVolumeSnapshotContent patches a volume snapshot content object
+func PatchVolumeSnapshotContent(
+	existingSnapshotContent *crdv1.VolumeSnapshotContent,
+	patch []PatchOp,
+	client clientset.Interface,
+	subresources ...string,
+) (*crdv1.VolumeSnapshotContent, error) {
+	data, err := json.Marshal(patch)
+	if nil != err {
+		return existingSnapshotContent, err
+	}
+
+	newSnapshotContent, err := client.SnapshotV1().VolumeSnapshotContents().Patch(context.TODO(), existingSnapshotContent.Name, types.JSONPatchType, data, metav1.PatchOptions{}, subresources...)
+	if err != nil {
+		return existingSnapshotContent, err
+	}
+
+	return newSnapshotContent, nil
+}
+
+// PatchVolumeSnapshot patches a volume snapshot object
+func PatchVolumeSnapshot(
+	existingSnapshot *crdv1.VolumeSnapshot,
+	patch []PatchOp,
+	client clientset.Interface,
+	subresources ...string,
+) (*crdv1.VolumeSnapshot, error) {
+	data, err := json.Marshal(patch)
+	if nil != err {
+		return existingSnapshot, err
+	}
+
+	newSnapshot, err := client.SnapshotV1().VolumeSnapshots(existingSnapshot.Namespace).Patch(context.TODO(), existingSnapshot.Name, types.JSONPatchType, data, metav1.PatchOptions{}, subresources...)
+	if err != nil {
+		return existingSnapshot, err
+	}
+
+	return newSnapshot, nil
+}