fix(trigger): add isolated-vm support to trigger.dev container builds (#3269)

Scheduled workflow executions running in trigger.dev containers were
failing to spawn isolated-vm workers because the native module wasn't
available in the container. This caused loop condition evaluation to
silently fail and exit after one iteration.

- Add isolated-vm to build.external and additionalPackages in trigger config
- Include isolated-vm-worker.cjs via additionalFiles for child process spawning
- Add fallback path resolution for worker file in trigger.dev environment

Author: waleedlatif1

apps/sim/lib/execution/isolated-vm.ts

@@ -679,11 +679,15 @@ function spawnWorker(): Promise<WorkerInfo> {
     }
 
     const currentDir = path.dirname(fileURLToPath(import.meta.url))
-    const workerPath = path.join(currentDir, 'isolated-vm-worker.cjs')
+    const candidatePaths = [
+      path.join(currentDir, 'isolated-vm-worker.cjs'),
+      path.join(process.cwd(), 'lib', 'execution', 'isolated-vm-worker.cjs'),
+    ]
+    const workerPath = candidatePaths.find((p) => fs.existsSync(p))
 
-    if (!fs.existsSync(workerPath)) {
+    if (!workerPath) {
       settleSpawnInProgress()
-      reject(new Error(`Worker file not found at ${workerPath}`))
+      reject(new Error(`Worker file not found at any of: ${candidatePaths.join(', ')}`))
       return
     }
 

apps/sim/trigger.config.ts

@@ -1,4 +1,4 @@
-import { additionalPackages } from '@trigger.dev/build/extensions/core'
+import { additionalFiles, additionalPackages } from '@trigger.dev/build/extensions/core'
 import { defineConfig } from '@trigger.dev/sdk'
 import { env } from './lib/core/config/env'
 
@@ -15,9 +15,11 @@ export default defineConfig({
   },
   dirs: ['./background'],
   build: {
+    external: ['isolated-vm'],
     extensions: [
+      additionalFiles({ files: ['./lib/execution/isolated-vm-worker.cjs'] }),
       additionalPackages({
-        packages: ['unpdf', 'pdf-lib'],
+        packages: ['unpdf', 'pdf-lib', 'isolated-vm'],
       }),
     ],
   },