ng build --watch does not generate ngsw pwa workers.

[axos88]

🐞 Bug report

ng build --watch does not generate ngsw-worker.js, and siblings.

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• xi18n
• run
• config
• help
• version
• doc

Is this a regression?

Not sure. Had the same problem with angular 8, figured out it was the watch flag only after i upgraded to 9.

Description

ng build --watch --prod: no ngsw-worker & siblings under dist/project
ng build --watch --prod: ngsw-worker & siblings are generated under dist/project

🔬 Minimal Reproduction

new new foo
cd foo
ng add @angular/pwa
ng build --watch --prod

🌍 Your Environment

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 9.0.1
Node: 10.17.0
OS: linux x64

Angular: 9.0.0
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router, service-worker
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.1
@angular-devkit/build-angular     0.900.1
@angular-devkit/build-optimizer   0.900.1
@angular-devkit/build-webpack     0.900.1
@angular-devkit/core              9.0.1
@angular-devkit/schematics        9.0.1
@angular/cli                      9.0.1
@ngtools/webpack                  9.0.1
@schematics/angular               9.0.1
@schematics/update                0.900.1
rxjs                              6.5.4
typescript                        3.7.5
webpack                           4.41.2

[alan-agius4]

This is actually by design. Maybe @clydin would know the exactly details why under watch these are not generated though.

[axos88]

Well, I just pulled my remaining hairs out by design then...

At least a warning and an option to turn this off would be great, because I am usually working with ng build --watch running in the background, and spent hours trying to figure out why they don't get generated