Update adapt-node to work under esm correctly. (#397)

FIXED: #390

Author: samccone

.changeset/fuzzy-jeans-join.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': minor
+---
+
+Make adapter node work under esm

.changeset/pre.json

@@ -35,6 +35,7 @@
     "forty-months-prove",
     "friendly-rivers-argue",
     "fuzzy-ghosts-call",
+    "fuzzy-jeans-join",
     "gorgeous-radios-tan",
     "gorgeous-taxis-smash",
     "hot-keys-walk",

packages/adapter-node/CHANGELOG.md

@@ -1,5 +1,11 @@
 # @sveltejs/adapter-node
 
+## 1.0.0-next.4
+
+### Minor Changes
+
+- Make adapter node work under esm
+
 ## 1.0.0-next.3
 
 ### Patch Changes

packages/adapter-node/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@sveltejs/adapter-node",
-	"version": "1.0.0-next.3",
+	"version": "1.0.0-next.4",
 	"main": "index.js",
 	"type": "module",
 	"files": [

packages/adapter-node/rollup.config.js

@@ -9,5 +9,5 @@ export default {
 		sourcemap: true
 	},
 	plugins: [nodeResolve(), commonjs()],
-	external: require('module').builtinModules
+	external: ['./app.js', ...require('module').builtinModules]
 };

packages/adapter-node/src/server.js

@@ -1,10 +1,14 @@
 import * as fs from 'fs';
 import * as http from 'http';
-import { parse, URLSearchParams } from 'url';
+import { dirname, join } from 'path';
+import { parse, URLSearchParams, fileURLToPath } from 'url';
 import sirv from 'sirv';
 import { get_body } from '@sveltejs/app-utils/http';
+// App is a dynamic file built from the application layer.
+/*eslint import/no-unresolved: [2, { ignore: ['\.\/app\.js$'] }]*/
+import * as app from './app.js';
 
-const app = require('./app.js');
+const __dirname = dirname(fileURLToPath(import.meta.url));
 
 const { PORT = 3000 } = process.env; // TODO configure via svelte.config.js
 
@@ -18,7 +22,7 @@ const noop_handler = (_req, _res, next) => next();
 
 const prerendered_handler = fs.existsSync('prerendered') ? mutable('prerendered') : noop_handler;
 
-const assets_handler = sirv('assets', {
+const assets_handler = sirv(join(__dirname, '/assets'), {
 	maxAge: 31536000,
 	immutable: true
 });