fix: Retain index files in dist output to match declarations (#1665)

Author: amannn

packages/next-intl/package.json

@@ -136,6 +136,7 @@
     "eslint": "^9.11.1",
     "eslint-config-molindo": "^8.0.0",
     "eslint-plugin-react-compiler": "0.0.0-experimental-8e3b87c-20240822",
+    "glob": "^11.0.1",
     "next": "^14.2.4",
     "path-to-regexp": "^6.2.2",
     "prettier": "^3.3.3",

packages/next-intl/rollup.config.js

@@ -1,6 +1,7 @@
 import preserveDirectives from 'rollup-plugin-preserve-directives';
 import {getBuildConfig} from 'tools';
 import pkg from './package.json' with {type: 'json'};
+import {glob} from 'glob';
 
 function rewriteBundle(regex, replaceFn) {
   return {
@@ -30,7 +31,14 @@ export default [
       middleware: 'src/middleware.tsx',
       routing: 'src/routing.tsx',
       plugin: 'src/plugin.tsx',
-      config: 'src/config.tsx'
+      config: 'src/config.tsx',
+
+      // Workaround for https://github.com/rollup/rollup/issues/3916
+      // See https://x.com/jamannnnnn/status/1880199734280732841
+      ...glob.sync('src/**/index.tsx').reduce((acc, file) => {
+        acc[file.replace('src/', '').replace('/index.tsx', '/index')] = file;
+        return acc;
+      }, {})
     },
     external: [
       ...Object.keys(pkg.dependencies),