fix: ANR replacements

Author: logaretm

packages/node-core/rollup.npm.config.mjs

@@ -1,5 +1,4 @@
 import { makeBaseNPMConfig, makeNPMConfigVariants, makeOtelLoaders } from '@sentry-internal/rollup-utils';
-import { replacePlugin } from 'rolldown/plugins';
 import { createWorkerCodeBuilder } from './rollup.anr-worker.config.mjs';
 
 const [anrWorkerConfig, getAnrBase64Code] = createWorkerCodeBuilder(
@@ -12,6 +11,36 @@ const [localVariablesWorkerConfig, getLocalVariablesBase64Code] = createWorkerCo
   'build/esm/integrations/local-variables',
 );
 
+/**
+ * Custom replace plugin that lazily evaluates replacement values.
+ * This is needed because the worker scripts are built in earlier configs,
+ * and we need to wait for their renderChunk hooks to complete before
+ * we can get the base64-encoded worker code.
+ */
+function makeLazyReplacePlugin(replacements, options = {}) {
+  const { delimiters = ['###', '###'] } = options;
+  const [delimiterStart, delimiterEnd] = delimiters;
+
+  return {
+    name: 'lazy-replace-plugin',
+    renderChunk(code) {
+      let result = code;
+
+      for (const [key, valueFn] of Object.entries(replacements)) {
+        const value = typeof valueFn === 'function' ? valueFn() : valueFn;
+        const searchPattern = `${delimiterStart}${key}${delimiterEnd}`;
+        // Don't add quotes - the source already has quotes around the placeholder
+        const replacement = value;
+
+        // Replace all occurrences
+        result = result.split(searchPattern).join(replacement);
+      }
+
+      return { code: result };
+    },
+  };
+}
+
 export default [
   ...makeOtelLoaders('./build', 'otel'),
   // The workers needs to be built first since it's their output is copied in the main bundle.
@@ -27,15 +56,13 @@ export default [
           preserveModules: true,
         },
         plugins: [
-          replacePlugin(
+          makeLazyReplacePlugin(
             {
-              AnrWorkerScript: JSON.stringify(getAnrBase64Code()),
-              LocalVariablesWorkerScript: JSON.stringify(getLocalVariablesBase64Code()),
+              AnrWorkerScript: getAnrBase64Code,
+              LocalVariablesWorkerScript: getLocalVariablesBase64Code,
             },
             {
               delimiters: ['###', '###'],
-              // removes some rollup warnings
-              preventAssignment: true,
             },
           ),
         ],