Minimize prod builds

app/package.json

@@ -5,6 +5,7 @@
   "scripts": {
     "build": "rspack",
     "build:prod": "rspack --config ./rspack.prod.config.js",
+    "build:prod:release": "rspack --config ./rspack.prod.release.config.js",
     "clean": "rimraf build && jlpm run clean:static",
     "clean:static": "rimraf -g \"../notebook/static/!(favicons)\"",
     "watch": "rspack --watch --config rspack.config.js"

app/rspack.prod.config.js

@@ -16,7 +16,7 @@ config[0] = merge(config[0], {
     filename: '[name].[contenthash].js?v=[contenthash]',
   },
   optimization: {
-    minimize: false,
+    minimize: true,
   },
   plugins: [
     new WPPlugin.JSONLicenseWebpackPlugin({

app/rspack.prod.release.config.js

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) Jupyter Development Team.
+ * Distributed under the terms of the Modified BSD License.
+ */
+
+const merge = require('webpack-merge').default;
+const config = require('./rspack.prod.config');
+
+config[0] = merge(config[0], {
+  // Turn off source maps
+  devtool: false,
+});
+
+module.exports = config;

pyproject.toml

@@ -166,7 +166,7 @@ ensured-targets = [
 install-pre-commit-hook = true
 
 [tool.hatch.build.hooks.jupyter-builder.build-kwargs]
-build_cmd = "build:prod"
+build_cmd = "build:prod:release"
 source_dir = "packages"
 build_dir = "notebook/static"
 npm = ["jlpm"]
@@ -189,7 +189,7 @@ before-bump-version = [
 ]
 before-build-npm = [
     "jlpm clean",
-    "jlpm build:prod"
+    "jlpm build:prod:release"
 ]
 before-build-python = [
     "jlpm clean"