From 1cf1eee4f30f5ef9c36e177172807c498aa5da57 Mon Sep 17 00:00:00 2001
From: Jonathan Goldwasser <jogold@users.noreply.github.com>
Date: Fri, 5 Nov 2021 21:11:37 +0100
Subject: [PATCH] fix(lambda-nodejs): yarn berry goes into immutable mode in CI
 (#17086)

Add the `--no-immutable` flag when running `yarn`.

Closes #17082


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
---
 packages/@aws-cdk/aws-lambda-nodejs/lib/package-manager.ts | 2 +-
 packages/@aws-cdk/aws-lambda-nodejs/test/bundling.test.ts  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/@aws-cdk/aws-lambda-nodejs/lib/package-manager.ts b/packages/@aws-cdk/aws-lambda-nodejs/lib/package-manager.ts
index 0f18c92cbde20..f0206bbd19a99 100644
--- a/packages/@aws-cdk/aws-lambda-nodejs/lib/package-manager.ts
+++ b/packages/@aws-cdk/aws-lambda-nodejs/lib/package-manager.ts
@@ -20,7 +20,7 @@ export class PackageManager {
 
   public static YARN = new PackageManager({
     lockFile: 'yarn.lock',
-    installCommand: ['yarn', 'install'],
+    installCommand: ['yarn', 'install', '--no-immutable'],
     runCommand: ['yarn', 'run'],
   });
 
diff --git a/packages/@aws-cdk/aws-lambda-nodejs/test/bundling.test.ts b/packages/@aws-cdk/aws-lambda-nodejs/test/bundling.test.ts
index ae871b67cb69f..e79ddc2aca150 100644
--- a/packages/@aws-cdk/aws-lambda-nodejs/test/bundling.test.ts
+++ b/packages/@aws-cdk/aws-lambda-nodejs/test/bundling.test.ts
@@ -342,7 +342,7 @@ test('Detects yarn.lock', () => {
     assetHashType: AssetHashType.OUTPUT,
     bundling: expect.objectContaining({
       command: expect.arrayContaining([
-        expect.stringMatching(/yarn\.lock.+yarn install/),
+        expect.stringMatching(/yarn\.lock.+yarn install --no-immutable/),
       ]),
     }),
   });