Multi lib support build in Angular 6

[fkolar]

Bug Report or Feature Request (mark with an x)

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

Area

- [X ] devkit
- [x] schematics

Versions

Angular CLI: 6.0.8
Node: 8.9.1
OS: darwin x64
Angular: 6.0.7

Repro steps

I am not even sure if this is a bug or more it should be a feature or I am missing something.
I have multi lib project created with libraries called: A, B. B library imports some modules from A.

When I run ng build B it fails as it is missing dependencies that exists inside A. So I need to run manually A and then B to make all works.

And I am not sure how to configure existing project to trigger build for project A first and then B. Are there a way how to specify this dependency?

Desired functionality

Option to specify library depedency so when I build project B it will automatically build project A or some kind of option to specify ng build A,B

Mention any other details that might be useful

[filipesilva]

There isn't a way currently to recursively build projects, but this is something we want to add.

[intellix]

Maybe possible using TS 3.0 Project references? https://blogs.msdn.microsoft.com/typescript/2018/07/30/announcing-typescript-3-0/#project-references

[filipesilva]

@intellix it helps, but is not enough by itself. Building a library is not just a matter of running typescript. Other things, like css preprocessors and ngc also need to run.

[alan-agius4]

Relates to #11023

[alan-agius4]

Duplicate of #11002

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