Migrate sonarqube-backend plugin to the new backend system #18320

Signed-off-by: Andy Muldoon <andy.muldoon@ericsson.com>

plugins/sonarqube-backend/README.md

@@ -2,6 +2,20 @@
 
 Welcome to the sonarqube-backend backend plugin!
 
+## New Backend System
+
+The Sonarqube backend plugin has support for the [new backend system](https://backstage.io/docs/backend-system/), here's how you can set that up:
+
+In your `packages/backend/src/index.ts` make the following changes:
+
+```diff
+  import { createBackend } from '@backstage/backend-defaults';
+  const backend = createBackend();
+  // ... other feature additions
++ backend.add(import('@backstage/plugin-sonarqube-backend');
+  backend.start();
+```
+
 ## Integrating into a backstage instance
 
 This plugin needs to be added to an existing backstage instance.

plugins/sonarqube-backend/api-report.md

@@ -3,6 +3,7 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { BackendFeature } from '@backstage/backend-plugin-api';
 import { Config } from '@backstage/config';
 import express from 'express';
 import { Logger } from 'winston';
@@ -72,5 +73,9 @@ export interface SonarqubeMeasure {
   value: string;
 }
 
+// @public
+const sonarqubePlugin: () => BackendFeature;
+export default sonarqubePlugin;
+
 // (No @packageDocumentation comment for this package)
 ```

plugins/sonarqube-backend/package.json

@@ -29,6 +29,7 @@
   },
   "dependencies": {
     "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@types/express": "*",

plugins/sonarqube-backend/src/index.ts

@@ -16,3 +16,4 @@
 
 export * from './service/router';
 export * from './service/sonarqubeInfoProvider';
+export { sonarqubePlugin as default } from './plugin';

plugins/sonarqube-backend/src/plugin.test.tsx

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2021 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 { sonarqubePlugin } from './plugin';
+
+describe('sonarqube', () => {
+  it('should export the sonarqube plugin', () => {
+    expect(sonarqubePlugin).toBeDefined();
+  });
+});

plugins/sonarqube-backend/src/plugin.ts

@@ -0,0 +1,57 @@
+/*
+ * 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 { DefaultSonarqubeInfoProvider } from './service/sonarqubeInfoProvider';
+import { createRouter } from './service/router';
+
+/**
+ * Sonarqube backend plugin
+ *
+ * @public
+ */
+export const sonarqubePlugin = createBackendPlugin({
+  pluginId: 'sonarqube',
+  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,
+            /**
+             * Info provider to be able to get all necessary information for the APIs
+             */
+            sonarqubeInfoProvider:
+              DefaultSonarqubeInfoProvider.fromConfig(config),
+          }),
+        );
+      },
+    });
+  },
+});