From d5f5e83fe75aab48d4533a5e640c0d2f79ea79e9 Mon Sep 17 00:00:00 2001
From: blam <ben@blam.sh>
Date: Tue, 16 Jun 2020 15:03:21 +0200
Subject: [PATCH] chore(scaffolder): Updating the boilerplate for the
 scaffolder backend

---
 .../src/service/standaloneApplication.ts      | 55 -------------------
 .../src/service/standaloneServer.ts           | 27 ++++-----
 plugins/scaffolder-backend/tsconfig.json      | 19 ++++---
 3 files changed, 24 insertions(+), 77 deletions(-)
 delete mode 100644 plugins/scaffolder-backend/src/service/standaloneApplication.ts

diff --git a/plugins/scaffolder-backend/src/service/standaloneApplication.ts b/plugins/scaffolder-backend/src/service/standaloneApplication.ts
deleted file mode 100644
index 3ff1de01eb..0000000000
--- a/plugins/scaffolder-backend/src/service/standaloneApplication.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright 2020 Spotify AB
- *
- * 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 {
-  errorHandler,
-  notFoundHandler,
-  requestLoggingHandler,
-} from '@backstage/backend-common';
-import compression from 'compression';
-import cors from 'cors';
-import express from 'express';
-import helmet from 'helmet';
-import { Logger } from 'winston';
-import { StorageBase, TemplaterBase } from '../scaffolder';
-import { createRouter } from './router';
-
-export interface ApplicationOptions {
-  enableCors: boolean;
-  storage: StorageBase;
-  templater: TemplaterBase;
-  logger: Logger;
-}
-
-export async function createStandaloneApplication(
-  options: ApplicationOptions,
-): Promise<express.Application> {
-  const { enableCors, storage, templater, logger } = options;
-  const app = express();
-
-  app.use(helmet());
-  if (enableCors) {
-    app.use(cors());
-  }
-  app.use(compression());
-  app.use(express.json());
-  app.use(requestLoggingHandler());
-  app.use('/', await createRouter({ templater, storage, logger }));
-  app.use(notFoundHandler());
-  app.use(errorHandler());
-
-  return app;
-}
diff --git a/plugins/scaffolder-backend/src/service/standaloneServer.ts b/plugins/scaffolder-backend/src/service/standaloneServer.ts
index b89e806f72..7f553bf4bf 100644
--- a/plugins/scaffolder-backend/src/service/standaloneServer.ts
+++ b/plugins/scaffolder-backend/src/service/standaloneServer.ts
@@ -22,8 +22,8 @@ import {
   DiskStorage,
   CookieCutter,
 } from '../scaffolder';
-import { createStandaloneApplication } from './standaloneApplication';
-
+import { createServiceBuilder, useHotMemoize } from '@backstage/backend-common';
+import { createRouter } from './router';
 export interface ServerOptions {
   port: number;
   enableCors: boolean;
@@ -34,27 +34,24 @@ export async function startStandaloneServer(
   options: ServerOptions,
 ): Promise<Server> {
   const logger = options.logger.child({ service: 'scaffolder-backend' });
-  const store = new DiskStorage({ logger });
+  const store = useHotMemoize(module, () => new DiskStorage({ logger }));
   const templater = new CookieCutter();
   logger.debug('Creating application...');
 
-  const app = await createStandaloneApplication({
-    enableCors: options.enableCors,
+  const router = await createRouter({
     storage: createStorage({ store, logger }),
     templater: createTemplater({ templater }),
     logger,
   });
 
-  logger.debug('Starting application server...');
-  return await new Promise((resolve, reject) => {
-    const server = app.listen(options.port, (err?: Error) => {
-      if (err) {
-        reject(err);
-        return;
-      }
+  const service = createServiceBuilder(module)
+    .enableCors({ origin: 'http://localhost:3000' })
+    .addRouter('/catalog', router);
 
-      logger.info(`Listening on port ${options.port}`);
-      resolve(server);
-    });
+  return await service.start().catch(err => {
+    logger.error(err);
+    process.exit(1);
   });
 }
+
+module.hot?.accept();
diff --git a/plugins/scaffolder-backend/tsconfig.json b/plugins/scaffolder-backend/tsconfig.json
index 7d4ea182e2..9ca38dca27 100644
--- a/plugins/scaffolder-backend/tsconfig.json
+++ b/plugins/scaffolder-backend/tsconfig.json
@@ -1,11 +1,16 @@
 {
-  "extends": "../../packages/backend/tsconfig.json",
-  "include": [
-    "./src"
-  ],
+  "include": ["src"],
   "compilerOptions": {
-    "baseUrl": "./src",
-    "outDir": "./dist",
-    "skipLibCheck": true
+    "outDir": "dist",
+    "incremental": true,
+    "sourceMap": true,
+    "declaration": true,
+    "strict": true,
+    "target": "es2019",
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "allowJs": true,
+    "lib": ["es2019"],
+    "types": ["node", "jest", "webpack-env"]
   }
 }