getsentry · timfish · Oct 31, 2025 · Oct 31, 2025 · Oct 31, 2025
diff --git a/dev-packages/node-core-integration-tests/package.json b/dev-packages/node-core-integration-tests/package.json
@@ -12,7 +12,7 @@
   "scripts": {
     "build": "run-s build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "tsc -p tsconfig.types.json",
     "clean": "rimraf -g **/node_modules && run-p clean:script",
     "clean:script": "node scripts/clean.js",

diff --git a/dev-packages/node-integration-tests/package.json b/dev-packages/node-integration-tests/package.json
@@ -12,7 +12,7 @@
   "scripts": {
     "build": "run-s build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "tsc -p tsconfig.types.json",
     "clean": "rimraf -g suites/**/node_modules suites/**/tmp_* && run-p clean:script",
     "clean:script": "node scripts/clean.js",

diff --git a/dev-packages/rollup-utils/bundleHelpers.mjs b/dev-packages/rollup-utils/bundleHelpers.mjs
@@ -9,11 +9,8 @@ import deepMerge from 'deepmerge';
 import {
   makeBrowserBuildPlugin,
   makeCleanupPlugin,
-  makeCommonJSPlugin,
   makeIsDebugBuildPlugin,
-  makeJsonPlugin,
   makeLicensePlugin,
-  makeNodeResolvePlugin,
   makeRrwebBuildPlugin,
   makeSetSDKSourcePlugin,
   makeSucrasePlugin,
@@ -26,7 +23,6 @@ const BUNDLE_VARIANTS = ['.js', '.min.js', '.debug.min.js'];
 export function makeBaseBundleConfig(options) {
   const { bundleType, entrypoints, licenseTitle, outputFileBase, packageSpecificConfig, sucrase } = options;
 
-  const nodeResolvePlugin = makeNodeResolvePlugin();
   const sucrasePlugin = makeSucrasePlugin({}, sucrase);
   const cleanupPlugin = makeCleanupPlugin();
   const markAsBrowserBuildPlugin = makeBrowserBuildPlugin(true);
@@ -36,13 +32,6 @@ export function makeBaseBundleConfig(options) {
     excludeShadowDom: false,
   });
 
-  // The `commonjs` plugin is the `esModuleInterop` of the bundling world. When used with `transformMixedEsModules`, it
-  // will include all dependencies, imported or required, in the final bundle. (Without it, CJS modules aren't included
-  // at all, and without `transformMixedEsModules`, they're only included if they're imported, not if they're required.)
-  const commonJSPlugin = makeCommonJSPlugin({ transformMixedEsModules: true });
-
-  const jsonPlugin = makeJsonPlugin();
-
   // used by `@sentry/browser`
   const standAloneBundleConfig = {
     output: {
@@ -94,7 +83,7 @@ export function makeBaseBundleConfig(options) {
     output: {
       format: 'esm',
     },
-    plugins: [commonJSPlugin, makeTerserPlugin(), licensePlugin],
+    plugins: [makeTerserPlugin(), licensePlugin],
     // Don't bundle any of Node's core modules
     external: builtinModules,
   };
@@ -103,7 +92,7 @@ export function makeBaseBundleConfig(options) {
     output: {
       format: 'esm',
     },
-    plugins: [commonJSPlugin, makeIsDebugBuildPlugin(true), makeTerserPlugin()],
+    plugins: [makeIsDebugBuildPlugin(true), makeTerserPlugin()],
     // Don't bundle any of Node's core modules
     external: builtinModules,
   };
@@ -119,7 +108,7 @@ export function makeBaseBundleConfig(options) {
       strict: false,
       esModule: false,
     },
-    plugins: [sucrasePlugin, nodeResolvePlugin, cleanupPlugin],
+    plugins: [sucrasePlugin, cleanupPlugin],
     treeshake: 'smallest',
   };
 

diff --git a/dev-packages/rollup-utils/npmHelpers.mjs b/dev-packages/rollup-utils/npmHelpers.mjs
@@ -15,7 +15,6 @@ import { defineConfig } from 'rollup';
 import {
   makeCleanupPlugin,
   makeDebugBuildStatementReplacePlugin,
-  makeNodeResolvePlugin,
   makeRrwebBuildPlugin,
   makeSucrasePlugin,
 } from './plugins/index.mjs';
@@ -37,7 +36,6 @@ export function makeBaseNPMConfig(options = {}) {
     bundledBuiltins = [],
   } = options;
 
-  const nodeResolvePlugin = makeNodeResolvePlugin();
   const sucrasePlugin = makeSucrasePlugin({}, sucrase);
   const debugBuildStatementReplacePlugin = makeDebugBuildStatementReplacePlugin();
   const cleanupPlugin = makeCleanupPlugin();
@@ -58,9 +56,6 @@ export function makeBaseNPMConfig(options = {}) {
       // Include __esModule property when there is a default prop
       esModule: 'if-default-prop',
 
-      // output individual files rather than one big bundle
-      preserveModules: true,
-
       // Allow wrappers or helper functions generated by rollup to use any ES2015 features
       generatedCode: {
         preset: 'es2015',
@@ -96,7 +91,7 @@ export function makeBaseNPMConfig(options = {}) {
       },
     },
 
-    plugins: [nodeResolvePlugin, sucrasePlugin, debugBuildStatementReplacePlugin, rrwebBuildPlugin, cleanupPlugin],
+    plugins: [sucrasePlugin, debugBuildStatementReplacePlugin, rrwebBuildPlugin, cleanupPlugin],
 
     // don't include imported modules from outside the package in the final output
     external: [

diff --git a/dev-packages/rollup-utils/plugins/bundlePlugins.mjs b/dev-packages/rollup-utils/plugins/bundlePlugins.mjs
@@ -10,8 +10,6 @@
 
 import * as childProcess from 'child_process';
 
-import commonjs from '@rollup/plugin-commonjs';
-import { nodeResolve } from '@rollup/plugin-node-resolve';
 import replace from '@rollup/plugin-replace';
 import terser from '@rollup/plugin-terser';
 import license from 'rollup-plugin-license';
@@ -146,12 +144,3 @@ export function makeTerserPlugin() {
     },
   });
 }
-
-// We don't pass these plugins any options which need to be calculated or changed by us, so no need to wrap them in
-// another factory function, as they are themselves already factory functions.
-
-export function makeNodeResolvePlugin() {
-  return nodeResolve();
-}
-
-export { commonjs as makeCommonJSPlugin };
diff --git a/dev-packages/rollup-utils/plugins/make-esm-plugin.mjs b/dev-packages/rollup-utils/plugins/make-esm-plugin.mjs
@@ -1,4 +1,5 @@
 import fs from 'node:fs';
+import path from 'node:path';
 
 /**
  * Outputs a package.json file with {type: module} in the root of the output directory so that Node
@@ -11,9 +12,9 @@ export function makePackageNodeEsm() {
       // We need to keep the `sideEffects` value from the original package.json,
       // as e.g. webpack seems to depend on this
       // without this, tree shaking does not work as expected
-      const packageJSONPath = (await this.resolve('package.json')).id;
-
-      const packageJSON = JSON.parse(fs.readFileSync(packageJSONPath, 'utf-8'));
+      const packageJSON = JSON.parse(
+        fs.readFileSync(path.resolve(process.cwd(), './package.json'), { encoding: 'utf8' }),
+      );
       const sideEffects = packageJSON.sideEffects;
       // For module federation we need to keep the version of the package
       const version = packageJSON.version;

diff --git a/dev-packages/rollup-utils/plugins/npmPlugins.mjs b/dev-packages/rollup-utils/plugins/npmPlugins.mjs
@@ -38,10 +38,6 @@ export function makeSucrasePlugin(options = {}, sucraseOptions = {}) {
   );
 }
 
-export function makeJsonPlugin() {
-  return json();
-}
-
 /**
  * Create a plugin which can be used to pause the build process at the given hook.
  *

diff --git a/dev-packages/test-utils/package.json b/dev-packages/test-utils/package.json
@@ -36,7 +36,7 @@
     "build": "run-s build:transpile build:types",
     "build:tarball": "run-s build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "tsc -p tsconfig.types.json",
     "clean": "rimraf -g ./node_modules ./build"
   },

diff --git a/dev-packages/test-utils/rollup.npm.config.mjs b/dev-packages/test-utils/rollup.npm.config.mjs
@@ -6,7 +6,6 @@ export default makeNPMConfigVariants(
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
         exports: 'named',
-        preserveModules: false,
       },
     },
   }),

diff --git a/package.json b/package.json
@@ -129,7 +129,7 @@
     "prettier": "^3.6.2",
     "prettier-plugin-astro": "^0.14.1",
     "rimraf": "^5.0.10",
-    "rollup": "^4.35.0",
+    "rolldown": "^1.0.0-beta.45",
     "rollup-plugin-cleanup": "^3.2.1",
     "rollup-plugin-license": "^3.3.1",
     "size-limit": "~11.1.6",

diff --git a/packages/astro/package.json b/packages/astro/package.json
@@ -68,11 +68,11 @@
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "tsc -p tsconfig.types.json",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.client.ts && madge --circular src/index.server.ts && madge --circular src/index.types.ts",

diff --git a/packages/astro/rollup.npm.config.mjs b/packages/astro/rollup.npm.config.mjs
@@ -2,7 +2,7 @@ import { makeBaseNPMConfig, makeNPMConfigVariants, makeOtelLoaders } from '@sent
 
 const variants = makeNPMConfigVariants(
   makeBaseNPMConfig({
-    entrypoints: ['src/index.server.ts', 'src/index.client.ts', 'src/integration/middleware/index.ts'],
+    entrypoints: ['src/index.server.ts', 'src/index.client.ts', 'src/integration/middleware/middleware.ts'],
     packageSpecificConfig: {
       output: {
         dynamicImportInCjs: true,

diff --git a/...astro/src/integration/middleware/index.ts → .../src/integration/middleware/middleware.ts b/...astro/src/integration/middleware/index.ts → .../src/integration/middleware/middleware.ts
diff --git a/packages/aws-serverless/package.json b/packages/aws-serverless/package.json
@@ -79,15 +79,15 @@
   },
   "scripts": {
     "build": "run-p build:transpile build:types",
-    "build:layer": "rimraf build/aws && rollup -c rollup.lambda-extension.config.mjs && yarn ts-node scripts/buildLambdaLayer.ts",
+    "build:layer": "rimraf build/aws && rolldown -c rollup.lambda-extension.config.mjs && yarn ts-node scripts/buildLambdaLayer.ts",
     "build:dev": "run-p build:transpile build:types",
-    "build:transpile": "rollup -c rollup.npm.config.mjs && yarn build:layer",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs && yarn build:layer",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

diff --git a/packages/browser-utils/package.json b/packages/browser-utils/package.json
@@ -44,13 +44,13 @@
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "clean": "rimraf build coverage sentry-internal-browser-utils-*.tgz",

diff --git a/packages/browser-utils/rollup.npm.config.mjs b/packages/browser-utils/rollup.npm.config.mjs
@@ -6,11 +6,6 @@ export default makeNPMConfigVariants(
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
         exports: 'named',
-        // set preserveModules to true because we don't want to bundle everything into one file.
-        preserveModules:
-          process.env.SENTRY_BUILD_PRESERVE_MODULES === undefined
-            ? true
-            : Boolean(process.env.SENTRY_BUILD_PRESERVE_MODULES),
       },
     },
   }),

diff --git a/packages/browser/package.json b/packages/browser/package.json
@@ -52,15 +52,15 @@
   "scripts": {
     "build": "run-p build:transpile build:bundle build:types",
     "build:dev": "run-p build:transpile build:types",
-    "build:bundle": "rollup -c rollup.bundle.config.mjs",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:bundle": "rolldown -c rollup.bundle.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:bundle:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
-    "build:bundle:watch": "rollup -c rollup.bundle.config.mjs --watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:bundle:watch": "rolldown -c rollup.bundle.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

diff --git a/packages/browser/rollup.npm.config.mjs b/packages/browser/rollup.npm.config.mjs
@@ -8,11 +8,6 @@ export default makeNPMConfigVariants(
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
         exports: 'named',
-        // set preserveModules to true because we don't want to bundle everything into one file.
-        preserveModules:
-          process.env.SENTRY_BUILD_PRESERVE_MODULES === undefined
-            ? true
-            : Boolean(process.env.SENTRY_BUILD_PRESERVE_MODULES),
       },
     },
   }),

diff --git a/packages/bun/package.json b/packages/bun/package.json
@@ -48,13 +48,13 @@
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

diff --git a/packages/cloudflare/package.json b/packages/cloudflare/package.json
@@ -68,13 +68,13 @@
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

diff --git a/packages/core/package.json b/packages/core/package.json
@@ -41,13 +41,13 @@
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
-    "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
+    "build:transpile:watch": "rolldown -c rollup.npm.config.mjs --watch",
     "build:types:watch": "tsc -p tsconfig.types.json --watch",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

diff --git a/packages/core/rollup.npm.config.mjs b/packages/core/rollup.npm.config.mjs
@@ -20,11 +20,6 @@ export default makeNPMConfigVariants(
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
         exports: 'named',
-        // set preserveModules to true because we don't want to bundle everything into one file.
-        preserveModules:
-          process.env.SENTRY_BUILD_PRESERVE_MODULES === undefined
-            ? true
-            : Boolean(process.env.SENTRY_BUILD_PRESERVE_MODULES),
       },
       plugins: [
         replace({

diff --git a/packages/deno/package.json b/packages/deno/package.json
@@ -31,7 +31,7 @@
     "deno-types": "node ./scripts/download-deno-types.mjs",
     "build": "run-s build:transpile build:types",
     "build:dev": "yarn build",
-    "build:transpile": "yarn deno-types && rollup -c rollup.npm.config.mjs",
+    "build:transpile": "yarn deno-types && rolldown -c rollup.npm.config.mjs",
     "build:types": "tsc -p tsconfig.types.json",
     "build:tarball": "npm pack",
     "circularDepCheck": "madge --circular src/index.ts",

@@ -46,8 +46,8 @@
   },
   "scripts": {
     "build": "run-p build:transpile build:types build:bundle",
-    "build:transpile": "rollup -c rollup.npm.config.mjs",
-    "build:bundle": "rollup -c rollup.bundle.config.mjs",
+    "build:transpile": "rolldown -c rollup.npm.config.mjs",
+    "build:bundle": "rolldown -c rollup.bundle.config.mjs",
     "build:dev": "run-p build:transpile build:types",
     "build:types": "run-s build:types:core build:types:downlevel",
     "build:types:core": "tsc -p tsconfig.types.json",

@@ -7,12 +7,6 @@ export default makeNPMConfigVariants(
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
         exports: 'named',
-        // set preserveModules to false because for feedback we actually want
-        // to bundle everything into one file.
-        preserveModules:
-          process.env.SENTRY_BUILD_PRESERVE_MODULES === undefined
-            ? false
-            : Boolean(process.env.SENTRY_BUILD_PRESERVE_MODULES),
       },
     },
     sucrase: {
-Original file line number
+Diff line change
@@ Expand Up @@
       );
     }
-    export function makeJsonPlugin() {
-      return json();
-    }
     /**
      * Create a plugin which can be used to pause the build process at the given hook.
      *
@@ Expand Down @@