bundle with rollup instead of esbuild (#6896)

* bundle with rollup instead of esbuild

* remove esbuild

* oops

* add comment

* fix package.json

.changeset/odd-beds-smile.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': patch
+---
+
+Bundle with rollup instead of esbuild

packages/adapter-node/index.js

@@ -1,6 +1,9 @@
 import { readFileSync, writeFileSync } from 'fs';
 import { fileURLToPath } from 'url';
-import * as esbuild from 'esbuild';
+import { rollup } from 'rollup';
+import { nodeResolve } from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import json from '@rollup/plugin-json';
 
 const files = fileURLToPath(new URL('./files', import.meta.url).href);
 
@@ -49,16 +52,23 @@ export default function (opts = {}) {
 
 			const pkg = JSON.parse(readFileSync('package.json', 'utf8'));
 
-			await esbuild.build({
-				platform: 'node',
-				sourcemap: 'linked',
-				target: 'es2022',
-				entryPoints: [`${tmp}/index.js`, `${tmp}/manifest.js`],
-				outdir: `${out}/server`,
-				splitting: true,
+			// we bundle the Vite output so that deployments only need
+			// their production dependencies. Anything in devDependencies
+			// will get included in the bundled code
+			const bundle = await rollup({
+				input: {
+					index: `${tmp}/index.js`,
+					manifest: `${tmp}/manifest.js`
+				},
+				external: [...Object.keys(pkg.dependencies || {})],
+				plugins: [nodeResolve(), commonjs(), json()]
+			});
+
+			await bundle.write({
+				dir: `${out}/server`,
 				format: 'esm',
-				bundle: true,
-				external: [...Object.keys(pkg.dependencies || {})]
+				sourcemap: true,
+				chunkFileNames: `chunks/[name]-[hash].js`
 			});
 
 			builder.copy(files, out, {

packages/adapter-node/package.json

@@ -32,7 +32,6 @@
 		"prepublishOnly": "npm run build"
 	},
 	"devDependencies": {
-		"@rollup/plugin-json": "^4.1.0",
 		"@sveltejs/kit": "workspace:*",
 		"@types/node": "^16.11.36",
 		"c8": "^7.11.3",
@@ -45,6 +44,8 @@
 		"uvu": "^0.5.3"
 	},
 	"dependencies": {
-		"esbuild": "^0.15.7"
+		"@rollup/plugin-commonjs": "^22.0.1",
+		"@rollup/plugin-json": "^4.1.0",
+		"@rollup/plugin-node-resolve": "^14.1.0"
 	}
 }