ng build my-lib --watch does not watch assets

[siegklenes]

🐞 bug report

Affected Package

Not sure, @angular/compiler

Is this a regression?

No, it's a bug in recent feature

Description

After generate a library project, adding

"assets": [
    "./assets/**/*.*"
  ],

in ng-package.json , the assets is not copied again to dist folder when --watch flag is on.
Problably, the Copying assets step needs to be reevaluated.

🔬 Minimal Reproduction

1- ng new test-project
2 - cd test-project
3 - ng g library one-lib
4 - edit ng-package.json, adding the assets property, declared before in the issue.
5 - create a folder in projects/one-lib/assets
6 - create a file inside that folder, file.json, and write a content in it
7 - ng build one-lib --watch
8 - in dist folder, should be created the assets folder and the file.json
9 - change the content in file.json inside project folder. With watch flag, the file should be recopied to dist folder.

🔥 Exception or Error

The file is not updated with watch flag.

In our private project, the automatic copy of file is essential

🌍 Your Environment

Angular Version:

Angular CLI: 9.1.6
Node: 10.16.3
OS: linux x64

Angular: 9.1.9
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.901.6
@angular-devkit/build-angular      0.901.6
@angular-devkit/build-ng-packagr   0.901.6
@angular-devkit/build-optimizer    0.901.6
@angular-devkit/build-webpack      0.901.6
@angular-devkit/core               9.1.6
@angular-devkit/schematics         9.1.6
@angular/cli                       9.1.6
@ngtools/webpack                   9.1.6
@schematics/angular                9.1.6
@schematics/update                 0.901.6
ng-packagr                         9.1.5
rxjs                               6.5.5
typescript                         3.8.3
webpack                            4.42.0

S.O Ubuntu 19.04

[petebacondarwin]

Transferring to the CLI project.

[alan-agius4]

Thanks for reporting this, but this is caused by an upstream package and not by the Angular CLI.

See: ng-packagr/ng-packagr#1545

[siegklenes]

Thanks @alan-agius4 @petebacondarwin @clydin

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