Feature request: plugable hooks

[no-more]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request

Command (mark with an x)

- [ ] new
- [X] build
- [ ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Versions

node -v
v10.13.0

yarn -v
1.12.3

npm -v
6.4.0

ng --version

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

Angular CLI: 7.1.0
Node: 10.13.0
OS: win32 x64
Angular: 7.1.0
... animations, cdk, cli, common, compiler, compiler-cli, core
... forms, http, language-service, material
... material-moment-adapter, platform-browser
... platform-browser-dynamic, platform-server, router

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.11.0
@angular-devkit/build-angular      0.11.0
@angular-devkit/build-ng-packagr   0.11.0
@angular-devkit/build-optimizer    0.11.0
@angular-devkit/build-webpack      0.11.0
@angular-devkit/core               7.1.0
@angular-devkit/schematics         7.1.0
@angular/flex-layout               7.0.0-beta.19
@ngtools/json-schema               1.1.0
@ngtools/webpack                   7.1.0
@schematics/angular                7.1.0
@schematics/update                 0.11.0
ng-packagr                         4.4.0
rxjs                               6.3.3
typescript                         3.1.6
webpack                            4.23.1

Repro steps

Not a bug

The log given by the failure

NA

Desired functionality

It was already asked previously but closed as out of scope prior version 1. Could we now have an update about pluggable hooks. I'm not talking about npm pre and post script but rather something that could work with --watch. My main use case is currently to be able to trigger a notification or an action at the end of the re-build in watch mode. Currently I have to keep an eye on the compilation box to check when the rebuild is over and then manually trigger the actions I want. This would be really usefull.

Thanks a lot

Mention any other details that might be useful

[alan-agius4]

Duplicate of https://github.com/angular/angular-cli/issues/11787

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