chore: Switch to rolldown

.size-limit.js

@@ -351,15 +351,15 @@ module.exports = [
     path: createCDNPath('bundle.tracing.replay.feedback.min.js'),
     gzip: false,
     brotli: false,
-    limit: '291 KB',
+    limit: '294 KB',
     disablePlugins: ['@size-limit/esbuild'],
   },
   {
     name: 'CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed',
     path: createCDNPath('bundle.tracing.replay.feedback.logs.metrics.min.js'),
     gzip: false,
     brotli: false,
-    limit: '297 KB',
+    limit: '300 KB',
     disablePlugins: ['@size-limit/esbuild'],
   },
   // Next.js SDK (ESM)
@@ -452,7 +452,7 @@ module.exports = [
     path: 'packages/node/build/esm/index.js',
     import: createImport('init'),
     gzip: true,
-    limit: '114 KB',
+    limit: '115 KB',
     disablePlugins: ['@size-limit/esbuild'],
     ignore: [...builtinModules, ...nodePrefixedBuiltinModules],
     modifyWebpackConfig: function (config) {

dev-packages/browser-integration-tests/suites/integrations/ContextLines/noAddedLines/test.ts

@@ -16,7 +16,10 @@ sentryTest('should not add source context lines to errors from script files', as
 
   const exception = eventData.exception?.values?.[0];
   const frames = exception?.stacktrace?.frames;
-  expect(frames).toHaveLength(1);
+  expect(frames?.length).toBeGreaterThanOrEqual(1);
+  // Verify the subject.bundle.js frame is present
+  expect(frames?.some(f => f.filename?.includes('subject.bundle.js'))).toBe(true);
+  // Core assertion: no context lines should be added for script files
   frames?.forEach(f => {
     expect(f).not.toHaveProperty('pre_context');
     expect(f).not.toHaveProperty('context_line');

dev-packages/browser-integration-tests/suites/integrations/moduleMetadata/appliesMetadata/test.ts

@@ -7,5 +7,9 @@ sentryTest('should provide module_metadata on stack frames in beforeSend', async
   const url = await getLocalTestUrl({ testDir: __dirname });
 
   const errorEvent = await getFirstSentryEnvelopeRequest<Event>(page, url);
-  expect(errorEvent.extra?.['module_metadata_entries']).toEqual([{ foo: 'bar' }]);
+  // Filter out null entries from internal Sentry frames that don't have module metadata
+  const metadataEntries = (errorEvent.extra?.['module_metadata_entries'] as Array<unknown>)?.filter(
+    entry => entry !== null,
+  );
+  expect(metadataEntries).toEqual([{ foo: 'bar' }]);
 });

dev-packages/browser-integration-tests/suites/integrations/moduleMetadata/appliesMetadataWithRewriteFrames/test.ts

@@ -9,6 +9,10 @@ sentryTest(
     const url = await getLocalTestUrl({ testDir: __dirname });
 
     const errorEvent = await getFirstSentryEnvelopeRequest<Event>(page, url);
-    expect(errorEvent?.extra?.['module_metadata_entries']).toEqual([{ foo: 'baz' }]);
+    // Filter out null entries from internal Sentry frames that don't have module metadata
+    const metadataEntries = (errorEvent?.extra?.['module_metadata_entries'] as Array<unknown>)?.filter(
+      entry => entry !== null,
+    );
+    expect(metadataEntries).toEqual([{ foo: 'baz' }]);
   },
 );

dev-packages/e2e-tests/test-applications/nextjs-15-t3/next.config.js

@@ -1,11 +1,11 @@
-await import('./src/env.js');
+require('./src/env.js');
 
 /** @type {import("next").NextConfig} */
 const config = {};
 
-import { withSentryConfig } from '@sentry/nextjs/config';
+const { withSentryConfig } = require('@sentry/nextjs/config');
 
-export default withSentryConfig(config, {
+module.exports = withSentryConfig(config, {
   webpack: {
     treeshake: {
       removeDebugLogging: true,

dev-packages/e2e-tests/test-applications/nextjs-15-t3/package.json

@@ -2,7 +2,6 @@
   "name": "t3",
   "version": "0.1.0",
   "private": true,
-  "type": "module",
   "scripts": {
     "build": "next build",
     "clean": "npx rimraf node_modules pnpm-lock.yaml",

dev-packages/e2e-tests/test-applications/nextjs-16-cf-workers/tests/worker-bundle.test.ts

@@ -53,7 +53,7 @@ function readOrchestrionPluginGraphSources(): string[] {
   const entrySource = fs.readFileSync(pluginEntry, 'utf8');
   return [
     entrySource,
-    ...[...entrySource.matchAll(/require\('(\.\.?\/[^']+)'\)/g)].map(([, specifier]) =>
+    ...[...entrySource.matchAll(/require\(['"](\.\.?\/[^'"]+)['"]\)/g)].map(([, specifier]) =>
       fs.readFileSync(path.resolve(path.dirname(pluginEntry), specifier), 'utf8'),
     ),
   ];

dev-packages/e2e-tests/test-applications/nextjs-orpc/next.config.js

@@ -1,9 +1,9 @@
 /** @type {import("next").NextConfig} */
 const config = {};
 
-import { withSentryConfig } from '@sentry/nextjs/config';
+const { withSentryConfig } = require('@sentry/nextjs/config');
 
-export default withSentryConfig(config, {
+module.exports = withSentryConfig(config, {
   webpack: {
     treeshake: {
       removeDebugLogging: true,

dev-packages/e2e-tests/test-applications/nextjs-orpc/package.json

@@ -2,7 +2,6 @@
   "name": "next-orpc",
   "version": "0.1.0",
   "private": true,
-  "type": "module",
   "scripts": {
     "build": "next build",
     "dev": "next dev -p 3030",

dev-packages/e2e-tests/test-applications/node-rolldown/package.json

@@ -17,7 +17,7 @@
   "devDependencies": {
     "@sentry-internal/test-utils": "link:../../../test-utils",
     "graphql": "16.9.0",
-    "rolldown": "1.2.5"
+    "rolldown": "1.2.10"
   },
   "volta": {
     "extends": "../../package.json"

dev-packages/e2e-tests/test-applications/sveltekit-2/vite.config.js

@@ -9,4 +9,9 @@ export default defineConfig({
     }),
     sveltekit(),
   ],
+  build: {
+    rollupOptions: {
+      external: ['fsevents'],
+    },
+  },
 });

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",

dev-packages/node-integration-tests/suites/esbuild/app-init.ts

@@ -0,0 +1,14 @@
+import * as Sentry from '@sentry/node';
+
+// `Sentry.init()` synchronously calls `registerDiagnosticsChannelInjection()`, which reaches the
+// vendored orchestrion transformer. That chain is split so a bundler can tree-shake it (see
+// `makeCjsExportsSplitPlugin` in server-utils' rollup config); this asserts the split degrades to
+// "no channel injection" rather than throwing when the bundler drops it.
+Sentry.init({
+  dsn: 'https://public@dsn.ingest.sentry.io/1337',
+  tracesSampleRate: 0,
+  autoSessionTracking: false,
+});
+
+// eslint-disable-next-line no-console
+console.log(`SENTRY_NODE_INITIALIZED client=${Boolean(Sentry.getClient())}`);

dev-packages/node-integration-tests/suites/esbuild/test.ts

@@ -32,4 +32,34 @@ describe('esbuild bundling', () => {
       rmSync(outDir, { recursive: true, force: true });
     }
   });
+
+  test('@sentry/node survives init() when bundled to ESM with tree-shaking', async () => {
+    const outDir = mkdtempSync(join(tmpdir(), 'sentry-esbuild-esm-'));
+    const outfile = join(outDir, 'bundle.mjs');
+
+    try {
+      await build({
+        entryPoints: [join(__dirname, 'app-init.ts')],
+        outfile,
+        platform: 'node',
+        format: 'esm',
+        bundle: true,
+        // `@sentry/server-utils` is `sideEffects: false`, so this is where a bundler is free to
+        // drop the vendored orchestrion transformer.
+        treeShaking: true,
+        logLevel: 'silent',
+      });
+
+      const result = spawnSync('node', [outfile], { encoding: 'utf-8' });
+
+      // Dropping the transformer must not take `init()` with it: reading a tree-shaken CJS
+      // container has to yield `undefined`, not throw on destructuring or on a call.
+      expect(result.stderr).not.toContain('Cannot destructure');
+      expect(result.stderr).not.toContain('is not a function');
+      expect(result.status).toBe(0);
+      expect(result.stdout).toContain('SENTRY_NODE_INITIALIZED client=true');
+    } finally {
+      rmSync(outDir, { recursive: true, force: true });
+    }
+  });
 });

dev-packages/rollup-utils/bundleHelpers.mjs

@@ -1,56 +1,50 @@
 /**
- * Rollup config docs: https://rollupjs.org/guide/en/#big-list-of-options
+ * Rolldown config docs: https://rolldown.rs/reference/config-options
  */
 
-import { builtinModules } from 'module';
+import * as fs from 'fs';
+import * as path from 'path';
 
 import deepMerge from 'deepmerge';
 
 import {
+  makeBannerOptions,
   makeBrowserBuildPlugin,
-  makeCommonJSPlugin,
-  makeEsbuildPlugin,
   makeIsDebugBuildPlugin,
-  makeLicensePlugin,
-  makeNodeResolvePlugin,
+  makeMinifierOptions,
   makeRrwebBuildPlugin,
   makeSetSDKSourcePlugin,
-  makeTerserPlugin,
 } from './plugins/index.mjs';
-import { mergePlugins } from './utils.mjs';
+import { getNodeBuiltIns, mergePlugins, treeShakePreset } from './utils.mjs';
 import { makeProductionReplacePlugin } from './plugins/npmPlugins.mjs';
 
 const BUNDLE_VARIANTS = ['.js', '.min.js', '.debug.min.js'];
 
+const packageDotJSON = JSON.parse(fs.readFileSync(path.resolve(process.cwd(), './package.json'), { encoding: 'utf8' }));
+
 export function makeBaseBundleConfig(options) {
-  const { bundleType, entrypoints, licenseTitle, outputFileBase, packageSpecificConfig, esbuild } = options;
+  const { bundleType, entrypoints, licenseTitle, outputFileBase, packageSpecificConfig } = options;
 
-  const nodeResolvePlugin = makeNodeResolvePlugin();
-  const transpilePlugin = makeEsbuildPlugin(esbuild);
   const markAsBrowserBuildPlugin = makeBrowserBuildPlugin(true);
-  const licensePlugin = makeLicensePlugin(licenseTitle);
+  const banner = makeBannerOptions(licenseTitle, packageDotJSON.version);
   const rrwebBuildPlugin = makeRrwebBuildPlugin({
     excludeIframe: false,
     excludeShadowDom: false,
   });
   const productionReplacePlugin = makeProductionReplacePlugin();
 
-  // 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 });
-
   // used by `@sentry/browser`
   const standAloneBundleConfig = {
     output: {
+      banner,
       format: 'iife',
       name: 'Sentry',
       intro: () => {
         return 'exports = window.Sentry || {};';
       },
     },
     context: 'window',
-    plugins: [rrwebBuildPlugin, markAsBrowserBuildPlugin, licensePlugin],
+    plugins: [rrwebBuildPlugin, markAsBrowserBuildPlugin],
   };
 
   // used by `@sentry/wasm` & pluggable integrations from core/browser (bundles which need to be combined with a stand-alone SDK bundle)
@@ -61,7 +55,7 @@ export function makeBaseBundleConfig(options) {
       format: 'cjs',
 
       // code to add before the CJS wrapper
-      banner: '(function (__window) {',
+      banner: `${banner}\n(function (__window) {`,
 
       // code to add just inside the CJS wrapper, before any of the wrapped code
       intro: 'var exports = {};',
@@ -84,30 +78,41 @@ export function makeBaseBundleConfig(options) {
       // code to add after the CJS wrapper
       footer: '}(window));',
     },
-    plugins: [rrwebBuildPlugin, markAsBrowserBuildPlugin, licensePlugin],
+    plugins: [rrwebBuildPlugin, markAsBrowserBuildPlugin],
   };
 
   const workerBundleConfig = {
     output: {
+      banner,
       format: 'esm',
+      minify: makeMinifierOptions(),
     },
-    plugins: [commonJSPlugin, makeTerserPlugin(), licensePlugin],
     // Don't bundle any of Node's core modules
-    external: builtinModules,
+    external: getNodeBuiltIns(),
   };
 
   const awsLambdaExtensionBundleConfig = {
     output: {
       format: 'esm',
+      minify: makeMinifierOptions(),
     },
-    plugins: [commonJSPlugin, makeIsDebugBuildPlugin(true), makeTerserPlugin()],
+    plugins: [makeIsDebugBuildPlugin(true)],
     // Don't bundle any of Node's core modules
-    external: builtinModules,
+    external: getNodeBuiltIns(),
   };
 
   // used by all bundles
   const sharedBundleConfig = {
     input: entrypoints,
+
+    // Point at the package's tsconfig so rolldown picks up its TypeScript & JSX settings.
+    tsconfig: path.resolve(process.cwd(), './tsconfig.json'),
+
+    // ES2020 is our floor: keeps `?.`/`??` native and downlevels everything newer.
+    transform: {
+      target: 'es2020',
+    },
+
     output: {
       // a file extension will be added to this base value when we specify either a minified or non-minified build
       entryFileNames: outputFileBase,
@@ -116,8 +121,8 @@ export function makeBaseBundleConfig(options) {
       strict: false,
       esModule: false,
     },
-    plugins: [productionReplacePlugin, transpilePlugin, nodeResolvePlugin],
-    treeshake: 'smallest',
+    plugins: [productionReplacePlugin],
+    treeshake: treeShakePreset('smallest'),
   };
 
   const bundleTypeConfigMap = {
@@ -147,7 +152,7 @@ export function makeBundleConfigVariants(baseConfig, options = {}) {
 
   const includeDebuggingPlugin = makeIsDebugBuildPlugin(true);
   const stripDebuggingPlugin = makeIsDebugBuildPlugin(false);
-  const terserPlugin = makeTerserPlugin();
+  const minify = makeMinifierOptions();
   const setSdkSourcePlugin = makeSetSDKSourcePlugin('cdn');
 
   // The additional options to use for each variant we're going to create.
@@ -162,15 +167,17 @@ export function makeBundleConfigVariants(baseConfig, options = {}) {
     '.min.js': {
       output: {
         entryFileNames: chunkInfo => `${baseConfig.output.entryFileNames(chunkInfo)}.min.js`,
+        minify,
       },
-      plugins: [stripDebuggingPlugin, setSdkSourcePlugin, terserPlugin],
+      plugins: [stripDebuggingPlugin, setSdkSourcePlugin],
     },
 
     '.debug.min.js': {
       output: {
         entryFileNames: chunkInfo => `${baseConfig.output.entryFileNames(chunkInfo)}.debug.min.js`,
+        minify,
       },
-      plugins: [includeDebuggingPlugin, setSdkSourcePlugin, terserPlugin],
+      plugins: [includeDebuggingPlugin, setSdkSourcePlugin],
     },
   };
 

dev-packages/rollup-utils/index.mjs

@@ -4,4 +4,4 @@ export { plugins };
 
 export * from './bundleHelpers.mjs';
 export * from './npmHelpers.mjs';
-export { insertAt } from './utils.mjs';
+export { insertAt, treeShakePreset } from './utils.mjs';