Make package path available at runtime

Author: fwang

.changeset/chilly-scissors-drum.md

@@ -0,0 +1,5 @@
+---
+"open-next": patch
+---
+
+Make package path available at runtime

packages/open-next/src/build.ts

@@ -613,6 +613,7 @@ async function createServerBundle(monorepoRoot: string, streaming = false) {
     outfile: path.join(outputPath, packagePath, "index.mjs"),
     banner: {
       js: [
+        `globalThis.monorepoPackagePath = "${packagePath}";`,
         "import { createRequire as topLevelCreateRequire } from 'module';",
         "const require = topLevelCreateRequire(import.meta.url);",
         "import bannerUrl from 'url';",