fix: Wrap injected code in self-invoking function to contain scope

Author: timfish

packages/bundler-plugin-core/src/utils.ts

@@ -314,7 +314,7 @@ export function generateGlobalInjectorCode({
 }) {
   // The code below is mostly ternary operators because it saves bundle size.
   // The checks are to support as many environments as possible. (Node.js, Browser, webworkers, etc.)
-  let code = `
+  let code = `(function () {
     var _global =
       typeof window !== 'undefined' ?
         window :
@@ -335,6 +335,8 @@ export function generateGlobalInjectorCode({
       _global.SENTRY_BUILD_INFO=${JSON.stringify(buildInfo)};`;
   }
 
+  code += '})();';
+
   return code;
 }