chore: upgrade to rollup 4.x

Author: christopherthielen

package.json

@@ -4,7 +4,7 @@
   "version": "1.2.0",
   "scripts": {
     "clean": "shx rm -rf lib lib-esm _bundles",
-    "build": "npm run compile && rollup -c && rollup -c --environment MINIFY",
+    "build": "npm run compile && rollup -c rollup.config.mjs && rollup -c rollup.config.mjs --environment MINIFY",
     "compile": "npm run clean && tsc && tsc -m es6 --outDir lib-esm",
     "test": "jest",
     "test:downstream": "test_downstream_projects",
@@ -47,6 +47,8 @@
     "@uirouter/core": ">=5.0.0"
   },
   "devDependencies": {
+    "@rollup/plugin-node-resolve": "^16.0.3",
+    "@rollup/plugin-terser": "^0.4.4",
     "@types/jest": "^30.0.0",
     "@types/jquery": "^3.3.38",
     "@types/lodash": "^4.14.152",
@@ -63,10 +65,7 @@
     "lodash": "^4.17.11",
     "prettier": "^2.0.5",
     "pretty-quick": "^2.0.1",
-    "rollup": "^2.10.9",
-    "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-sourcemaps": "^0.6.2",
-    "rollup-plugin-uglify": "^6.0.1",
+    "rollup": "^4.54.0",
     "ts-jest": "^29.4.6",
     "typescript": "^5.9.3"
   },

rollup.config.js

@@ -0,0 +1,41 @@
+import nodeResolve from '@rollup/plugin-node-resolve';
+import terser from '@rollup/plugin-terser';
+import { readFileSync } from 'fs';
+
+const MINIFY = process.env.MINIFY;
+
+const pkg = JSON.parse(readFileSync('./package.json', 'utf-8'));
+const banner = `/**
+ * ${pkg.description}
+ * @version v${pkg.version}
+ * @link ${pkg.homepage}
+ * @license MIT License, http://www.opensource.org/licenses/MIT
+ */`;
+
+const terserOpts = {
+  output: {
+    // retain multiline comment with @license
+    comments: (node, comment) => comment.type === 'comment2' && /@license/i.test(comment.value),
+  },
+};
+
+const plugins = [nodeResolve()];
+
+if (MINIFY) plugins.push(terser(terserOpts));
+
+const extension = MINIFY ? '.min.js' : '.js';
+
+export default {
+  input: 'lib-esm/index.js',
+  output: {
+    name: pkg.name,
+    globals: { '@uirouter/core': '@uirouter/core' },
+    sourcemap: true,
+    format: 'umd',
+    exports: 'named',
+    banner: banner,
+    file: '_bundles/ui-router-dsr' + extension,
+  },
+  external: ['@uirouter/core'],
+  plugins: plugins,
+};