feat: swc builder + hot reload

Author: tacxou

env.exemple .env.exampleenv.exemple renamed to .env.example

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://json.schemastore.org/swcrc",
+  "sourceMaps": true,
+  "jsc": {
+    "parser": {
+      "syntax": "typescript",
+      "decorators": true,
+      "dynamicImport": true
+    },
+    "baseUrl": "./"
+  },
+  "minify": false
+}

.swcrc

@@ -3,6 +3,9 @@
   "collection": "@nestjs/schematics",
   "sourceRoot": "src",
   "compilerOptions": {
-    "deleteOutDir": true
+    "deleteOutDir": true,
+    "builder": "swc",
+    "typeCheck": true,
+    "watchAssets": true
   }
 }

nest-cli.json

@@ -31,7 +31,6 @@
     "class-validator": "^0.14.0",
     "fdir": "^6.1.1",
     "path": "^0.12.7",
-    "pkg": "^5.8.1",
     "reflect-metadata": "^0.1.13",
     "rxjs": "^7.8.1",
     "yaml": "^2.3.4"
@@ -40,6 +39,8 @@
     "@nestjs/cli": "^10.0.0",
     "@nestjs/schematics": "^10.0.0",
     "@nestjs/testing": "^10.0.0",
+    "@swc/cli": "^0.1.63",
+    "@swc/core": "^1.3.100",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.2",
     "@types/node": "^20.3.1",
@@ -51,6 +52,7 @@
     "eslint-plugin-prettier": "^5.0.0",
     "jest": "^29.5.0",
     "prettier": "^3.0.0",
+    "pkg": "^5.8.1",
     "source-map-support": "^0.5.21",
     "supertest": "^6.3.3",
     "ts-jest": "^29.1.0",

package.json

@@ -4,13 +4,16 @@ import { AppService } from './app.service';
 import { LogLevel } from '@nestjs/common'
 import ConfigInstance from './config'
 
-
-
-async function bootstrap() {
+declare const module: any
+;(async (): Promise<void> => {
   const app = await NestFactory.createApplicationContext(AppModule,{logger: setLogLevel() as LogLevel[]});
   const appService = app.get(AppService);
   appService.runDaemon()
-}
+  if (module.hot) {
+    module.hot.accept()
+    module.hot.dispose((): Promise<void> => app.close())
+  }
+})()
 function setLogLevel():Array<string>{
   let loggerOptions=['error', 'warn','fatal']
   let configInstance=ConfigInstance()
@@ -33,4 +36,3 @@ function setLogLevel():Array<string>{
   }
   return loggerOptions
 }
-bootstrap();