Turbopack fix Next.js package not found panic

joshhannaford/pack-3980-error-turbopackinternalerror-nextjs-package-not-found

Author: Cy-Tek

packages/next/src/lib/find-root.ts

@@ -1,5 +1,6 @@
 import { dirname } from 'path'
 import findUp from 'next/dist/compiled/find-up'
+import * as Log from '../build/output/log'
 
 export function findRootLockFile(cwd: string) {
   return findUp.sync(
@@ -17,6 +18,30 @@ export function findRootLockFile(cwd: string) {
 }
 
 export function findRootDir(cwd: string) {
-  const lockFile = findRootLockFile(cwd)
+  let lockFile = findRootLockFile(cwd)
+  if (!lockFile) return undefined
+
+  let lockFiles = [lockFile]
+  while (lockFile) {
+    const nextDir = dirname(dirname(lockFile))
+    const newLockFile = findRootLockFile(nextDir)
+
+    if (newLockFile) {
+      lockFiles.push(newLockFile)
+      lockFile = newLockFile
+    } else {
+      break
+    }
+  }
+
+  if (lockFiles.length > 1) {
+    Log.warnOnce(
+      `Warning: Found multiple lockfiles. Consider removing the lockfiles at ${lockFiles
+        .slice(0, lockFiles.length - 1)
+        .map((str) => '\n   * ' + str)
+        .join('')}\n`
+    )
+  }
+
   return lockFile ? dirname(lockFile) : undefined
 }

packages/next/src/server/config.ts

@@ -699,7 +699,7 @@ function assignDefaults(
     dset(result, ['turbopack', 'root'], result.outputFileTracingRoot)
   }
 
-  // use the closest lockfile as tracing root
+  // use the highest level lockfile as tracing root
   if (!result?.outputFileTracingRoot || !result?.turbopack?.root) {
     let rootDir = findRootDir(dir)
 

packages/next/src/telemetry/detached-flush.ts

@@ -9,6 +9,7 @@ import { PHASE_DEVELOPMENT_SERVER } from '../shared/lib/constants'
 // this process should be started with following arg order
 // 1. mode e.g. dev, export, start
 // 2. project dir
+// 3. root dir
 ;(async () => {
   const args = [...process.argv]
   let dir = args.pop()