Unnecessary rebuild when using an external plugin

[HazzMan2409]

Command

build, serve

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 you add an esbuild plugin to use a global that was loaded in via angular.json scripts instead of having it bundled, you get an extra rebuild when you run a build in watch mode on startup.

I've got a minimal setup in the linked repo with Leaflet. If you run ng serve --verbose you will see what I mean.

I've checked and running the exact same plugin with esbuild directly does not cause this extra rebuild. Note that I'm using https://www.npmjs.com/package/@angular-builders/custom-esbuild to run the esbuild plugin.

Minimal Reproduction

https://github.com/HazzMan2409/ng-extra-rebuild

Exception or Error

Your Environment

Angular CLI: 18.2.12
Node: 20.11.0
Package Manager: npm 10.2.4
OS: darwin arm64

Angular: 18.2.12
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1802.12
@angular-devkit/build-angular   18.2.12
@angular-devkit/core            18.2.12
@angular-devkit/schematics      18.2.12
@schematics/angular             18.2.12
rxjs                            7.8.1
typescript                      5.5.4
zone.js                         0.14.10

Anything else relevant?

No response

[dgp1130]

Angular does not support custom esbuild, so we can't provide any real guidance on what might be going on here.

[HazzMan2409]

Ok. I'll try and re-create the issue with a minimal reproduction using angular's builder api to add an esbuild plugin.

If it's a bug with custom esbuild I'll raise an issue there.