Migrate nomad backend plugin to new backend system

Signed-off-by: Lavanya Sainik <lavanya.sainik@ericsson.com>

plugins/nomad-backend/src/index.ts

@@ -14,3 +14,4 @@
  * limitations under the License.
  */
 export * from './service/router';
+export { nomadPlugin as default } from './plugin';

plugins/nomad-backend/src/plugin.test.ts

@@ -0,0 +1,22 @@
+/*
+ * 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 { nomadPlugin } from './plugin';
+
+describe('nomad', () => {
+  it('should export the nomad plugin', () => {
+    expect(nomadPlugin).toBeDefined();
+  });
+});

plugins/nomad-backend/src/plugin.ts

@@ -0,0 +1,52 @@
+/*
+ * 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 { loggerToWinstonLogger } from '@backstage/backend-common';
+import {
+  createBackendPlugin,
+  coreServices,
+} from '@backstage/backend-plugin-api';
+import { createRouter } from './service/router';
+
+/**
+ * Nomad backend plugin
+ *
+ * @public
+ */
+export const nomadPlugin = createBackendPlugin({
+  pluginId: 'nomad',
+  register(env) {
+    env.registerInit({
+      deps: {
+        logger: coreServices.logger,
+        config: coreServices.rootConfig,
+        httpRouter: coreServices.httpRouter,
+      },
+      async init({ logger, config, httpRouter }) {
+        const winstonLogger = loggerToWinstonLogger(logger);
+        httpRouter.use(
+          await createRouter({
+            /**
+             * Logger for logging purposes
+             */
+            logger: winstonLogger,
+            config,
+          }),
+        );
+      },
+    });
+  },
+});