Update bundle meta when using NG_BUILD_OPTIMIZE_CHUNKS

[ChristopherPHolder]

Command

build

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

When we run a build with NG_BUILD_OPTIMIZE_CHUNKS the stats.json file is not updated so it will show build with the old bundles and not the new ones.

This makes it harder to analyse the build output.

Minimal Reproduction

Run ng build --statsJson on any project using the NG_BUILD_OPTIMIZE_CHUNKS environment variable.

Then open the stats.json on https://esbuild.github.io/analyze/

You should clearly notice that the old chunks before the optimization are present and the changes on main are not reflected.

Exception or Error

Your Environment

Angular CLI: 18.2.6
Node: 22.10.0
Package Manager: npm 10.9.0
OS: win32 x64

Angular: 18.2.6
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router, ssr

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1802.6
@angular-devkit/build-angular   18.2.6
@angular-devkit/core            18.2.6
@angular-devkit/schematics      18.2.6
@schematics/angular             18.2.6
rxjs                            7.8.1
typescript                      5.5.4
zone.js                         0.14.10

Anything else relevant?

Potential solution is to adapt the meta data eg:

https://github.com/push-based/ngx-build/blob/ec331e177e43f2c45d4f56b4df4d87a20a5fabfd/packages/esbuild-plugin/src/lib/bundle-adaptor.utils.ts

I am happy to contribute and help if can :)

Related:

• refactor(@angular/build): add experimental chunk optimizer for production application builds #27953