From 1a5538e0c9cc121fa1608eb99e941bc3a5f59ad6 Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Tue, 7 Nov 2023 14:20:35 -0500
Subject: [PATCH] fix(@angular-devkit/build-angular): disable Worker wait loop
 for TS/NG parallel compilation in web containers

When using the `application` builder, a parallel TS/NG compilation is used that is run inside a Node.js Worker.
This Worker by default uses an Atomics-based wait loop to improve performance while waiting for messages. This
loop relies on the synchronous API `receiveMessageOnPort`. While this works well in Node.js, the web container
execution environment does not currently support passing transferable objects via `receiveMessageOnPort`. Attempting
to do so will cause a serialization error and a failed application build. To avoid this problem, the wait loop
optimization is disabled when the web container execution environment is detected. This change is only needed
for the TS/NG compilation as no other parallel operation within the build system currently uses `receiveMessageOnPort`
with transferable objects.

(cherry picked from commit 6f9ef1fbb147f7d8f25d48500595b3f92ebb9ba2)
---
 .../tools/esbuild/angular/compilation/parallel-compilation.ts  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/angular_devkit/build_angular/src/tools/esbuild/angular/compilation/parallel-compilation.ts b/packages/angular_devkit/build_angular/src/tools/esbuild/angular/compilation/parallel-compilation.ts
index b23ed97d0fca..0da2a186956f 100644
--- a/packages/angular_devkit/build_angular/src/tools/esbuild/angular/compilation/parallel-compilation.ts
+++ b/packages/angular_devkit/build_angular/src/tools/esbuild/angular/compilation/parallel-compilation.ts
@@ -36,6 +36,9 @@ export class ParallelCompilation extends AngularCompilation {
       minThreads: 1,
       maxThreads: 1,
       idleTimeout: Infinity,
+      // Web containers do not support transferable objects with receiveOnMessagePort which
+      // is used when the Atomics based wait loop is enable.
+      useAtomics: !process.versions.webcontainer,
       filename: localRequire.resolve('./parallel-worker'),
     });
   }