Creating extension point for kubernetesObjectsProvider

Signed-off-by: Andres Mauricio Gomez P <andmagom@outlook.com>

plugins/kubernetes-node/.eslintrc.js

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+module.exports = require('@backstage/cli/config/eslint-factory')(__dirname);

plugins/kubernetes-node/README.md

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+# @backstage/plugin-kubernetes-node
+
+Welcome to the Node.js library package for the kubernetes plugin!
+
+_This plugin was created through the Backstage CLI_

plugins/kubernetes-node/api-report.md

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+## API Report File for "@backstage/plugin-kubernetes-node"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+import { ExtensionPoint } from '@backstage/backend-plugin-api';
+import { KubernetesObjectsProvider } from '@backstage/plugin-kubernetes-backend';
+
+// @public
+export interface KubernetesObjectsProviderExtensionPoint {
+  // (undocumented)
+  addObjectsProvider(provider: KubernetesObjectsProvider): void;
+}
+
+// @public
+export const kubernetesObjectsProviderExtensionPoint: ExtensionPoint<KubernetesObjectsProviderExtensionPoint>;
+```

plugins/kubernetes-node/catalog-info.yaml

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+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: backstage-plugin-kubernetes-node
+  title: '@backstage/plugin-kubernetes-node'
+  description: Node.js library for the kubernetes plugin
+spec:
+  lifecycle: experimental
+  type: backstage-node-library
+  owner: kubernetes-maintainers

plugins/kubernetes-node/package.json

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+{
+  "name": "@backstage/plugin-kubernetes-node",
+  "description": "Node.js library for the kubernetes plugin",
+  "version": "0.0.0",
+  "main": "src/index.ts",
+  "types": "src/index.ts",
+  "license": "Apache-2.0",
+  "publishConfig": {
+    "access": "public",
+    "main": "dist/index.cjs.js",
+    "types": "dist/index.d.ts"
+  },
+  "backstage": {
+    "role": "node-library"
+  },
+  "scripts": {
+    "build": "backstage-cli package build",
+    "lint": "backstage-cli package lint",
+    "test": "backstage-cli package test",
+    "clean": "backstage-cli package clean",
+    "prepack": "backstage-cli package prepack",
+    "postpack": "backstage-cli package postpack"
+  },
+  "devDependencies": {
+    "@backstage/cli": "workspace:^"
+  },
+  "files": [
+    "dist"
+  ],
+  "dependencies": {
+    "@backstage/backend-plugin-api": "workspace:^",
+    "@backstage/plugin-kubernetes-backend": "workspace:^"
+  }
+}

plugins/kubernetes-node/src/extensions.ts

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+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { createExtensionPoint } from '@backstage/backend-plugin-api';
+import { KubernetesObjectsProvider } from '@backstage/plugin-kubernetes-backend';
+
+/**
+ * The interface for {@link kubernetesObjectsProviderExtensionPoint}.
+ *
+ * @public
+ */
+export interface KubernetesObjectsProviderExtensionPoint {
+  addObjectsProvider(provider: KubernetesObjectsProvider): void;
+}
+
+/**
+ * An extension point the exposes the ability to configure a objects provider.
+ *
+ * @public
+ */
+export const kubernetesObjectsProviderExtensionPoint =
+  createExtensionPoint<KubernetesObjectsProviderExtensionPoint>({
+    id: 'kubernetes.objects-provider',
+  });

plugins/kubernetes-node/src/index.ts

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+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Node.js library for the kubernetes plugin.
+ *
+ * @packageDocumentation
+ */
+
+// In this package you might for example export functions that
+// help other plugins or modules interact with your plugin.
+
+/**
+ * Node.js library for the kubernetes plugin.
+ *
+ * @packageDocumentation
+ */
+
+export {
+  kubernetesObjectsProviderExtensionPoint,
+  type KubernetesObjectsProviderExtensionPoint,
+} from './extensions';

plugins/kubernetes-node/src/setupTests.ts

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+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+export {};