fix(esbuild): Inject different debug IDs into different output bundles (#301)

Author: Luca Forstner

packages/esbuild-plugin/src/index.ts

@@ -38,26 +38,57 @@ function esbuildReleaseInjectionPlugin(injectionCode: string): UnpluginOptions {
 
 function esbuildDebugIdInjectionPlugin(): UnpluginOptions {
   const pluginName = "sentry-esbuild-debug-id-injection-plugin";
-  const virtualReleaseInjectionFilePath = path.resolve("_sentry-debug-id-injection-stub"); // needs to be an absolute path for older eslint versions
+  const proxyNamespace = "sentry-debug-id-proxy";
+  const stubNamespace = "sentry-debug-id-stub";
 
   return {
     name: pluginName,
 
     esbuild: {
-      setup({ initialOptions, onLoad, onResolve }) {
-        initialOptions.inject = initialOptions.inject || [];
-        initialOptions.inject.push(virtualReleaseInjectionFilePath);
+      setup({ onLoad, onResolve }) {
+        onResolve({ filter: /.*/ }, (args) => {
+          if (args.kind !== "entry-point") {
+            return;
+          }
+          return {
+            pluginName,
+            path: args.path,
+            namespace: proxyNamespace,
+            pluginData: {
+              originalPath: args.path,
+              originalResolveDir: args.resolveDir,
+            },
+          };
+        });
+
+        onLoad({ filter: /.*/, namespace: proxyNamespace }, (args) => {
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+          const originalPath = args.pluginData.originalPath as string;
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+          const originalResolveDir = args.pluginData.originalResolveDir as string;
+          return {
+            loader: "js",
+            pluginName,
+            contents: `
+              import "_sentry-debug-id-injection-stub";
+              import * as OriginalModule from "${originalPath}";
+              export default OriginalModule.default;
+              export * from "${originalPath}";`,
+            resolveDir: originalResolveDir,
+          };
+        });
 
         onResolve({ filter: /_sentry-debug-id-injection-stub/ }, (args) => {
           return {
             path: args.path,
             sideEffects: true,
             pluginName,
+            namespace: stubNamespace,
             suffix: "?sentry-module-id=" + uuidv4(), // create different module, each time this is resolved
           };
         });
 
-        onLoad({ filter: /_sentry-debug-id-injection-stub/ }, () => {
+        onLoad({ filter: /_sentry-debug-id-injection-stub/, namespace: stubNamespace }, () => {
           return {
             loader: "js",
             pluginName,