Start api directory, which will become a module.

api/types/image.go

@@ -0,0 +1,21 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package types
+
+// Image contains an image name, a new name, a new tag or digest,
+// which will replace the original name and tag.
+type Image struct {
+	// Name is a tag-less image name.
+	Name string `json:"name,omitempty" yaml:"name,omitempty"`
+
+	// NewName is the value used to replace the original name.
+	NewName string `json:"newName,omitempty" yaml:"newName,omitempty"`
+
+	// NewTag is the value used to replace the original tag.
+	NewTag string `json:"newTag,omitempty" yaml:"newTag,omitempty"`
+
+	// Digest is the value used to replace the original image tag.
+	// If digest is present NewTag value is ignored.
+	Digest string `json:"digest,omitempty" yaml:"digest,omitempty"`
+}