TemplateProcessor can add custom resource schemas to openapi

kyaml/fn/framework/testdata/template-processor/patches/custom-resource/patch.template.yaml

@@ -0,0 +1,10 @@
+# Copyright 2021 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+spec:
+  targets:
+  - app: B
+    size: small
+  - app: C
+    type: Ruby
+    size: large

kyaml/fn/framework/testdata/template-processor/schemas/foo.json

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+{
+  "definitions": {
+    "com.example.v1.Foo": {
+      "type": "object",
+      "properties": {
+        "apiVersion": {
+          "description": "APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources",
+          "type": "string"
+        },
+        "kind": {
+          "description": "Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds",
+          "type": "string"
+        },
+        "metadata": {
+          "description": "Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata",
+          "$ref": "#/definitions/io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta"
+        },
+        "spec": {
+          "type": "object",
+          "required": [
+            "targets"
+          ],
+          "properties": {
+            "targets": {
+              "type": "array",
+              "x-kubernetes-patch-merge-key": "app",
+              "x-kubernetes-patch-strategy": "merge",
+              "items": {
+                "type": "object",
+                "required": [
+                  "app"
+                ],
+                "properties": {
+                  "app": {
+                    "type": "string"
+                  },
+                  "size": {
+                    "type": "string"
+                  },
+                  "type": {
+                    "type": "string"
+                  }
+                }
+              }
+            }
+          }
+        }
+      },
+      "x-kubernetes-group-version-kind": [
+        {
+          "group": "example.com",
+          "kind": "Foo",
+          "version": "v1"
+        }
+      ]
+    }
+  }
+}

kyaml/fn/framework/testdata/template-processor/templates/custom-resource/foo.yaml

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+# Copyright 2021 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: example
+spec:
+  targets:
+  - app: A
+    type: Go
+    size: small
+  - app: B
+    type: Go