Support scopes packages in externals when found in a transitive dep #1552 (#1569)

* Support scopes packages in externals when found in a transitive dep

* fixed typescript errro

* Add changeset

Author: ericallam

.changeset/kind-plants-tap.md

@@ -0,0 +1,5 @@
+---
+"trigger.dev": patch
+---
+
+Fix externals from monorepo packages with scoped package names #1552

packages/cli-v3/src/build/externals.ts

@@ -45,6 +45,27 @@ async function linkExternal(external: CollectedExternal, resolveDir: string, log
     external,
   });
 
+  // For scoped packages, we need to ensure the scope directory exists
+  if (external.name.startsWith("@")) {
+    // Get the scope part (e.g., '@huggingface')
+    const scopeDir = external.name.split("/")[0];
+
+    if (scopeDir) {
+      const scopePath = join(destinationPath, scopeDir);
+
+      logger.debug("[externals] Ensure scope directory exists", {
+        scopeDir,
+        scopePath,
+      });
+
+      await mkdir(scopePath, { recursive: true });
+    } else {
+      logger.debug("[externals] Unable to get the scope directory", {
+        external,
+      });
+    }
+  }
+
   const symbolicLinkPath = join(destinationPath, external.name);
 
   // Make sure the symbolic link does not exist