Building dynamic secondary entry points manually

Type of Issue

[ ] Bug Report
[x] Feature Request

Description

I have a library of about 60 components each as a secondary entry point that is figured out dynamically by ng-packagr with a package.json as described in the instructions.

This works fine if I trigger the build like ng build components; it creates all the secondary entry points and I can import them in my app.

However, I cannot build secondary entry points manually. When I try building a single component with:

$(npm bin)/ng-packagr -p projects/components/button

I get the following error:

BUILD ERROR
Cannot read property 'startsWith' of undefined
TypeError: Cannot read property 'startsWith' of undefined
    at NgEntryPoint.flattenModuleId (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/ng-packagr/lib/ng-package-format/entry-point.js:142:27)
    at NgEntryPoint.get flatModuleFile [as flatModuleFile] (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/ng-packagr/lib/ng-package-format/entry-point.js:104:56)
    at NgEntryPoint.get destinationFiles [as destinationFiles] (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/ng-packagr/lib/ng-package-format/entry-point.js:75:37)
    at entryPoints.map.entryPoint (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/ng-packagr/lib/ng-v5/package.transform.js:50:52)
    at Array.map (<anonymous>)
    at MapSubscriber.source$.pipe.operators_1.map.graph [as project] (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/ng-packagr/lib/ng-v5/package.transform.js:49:77)
    at MapSubscriber._next (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/rxjs/internal/operators/map.js:86:35)
    at MapSubscriber.Subscriber.next (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/rxjs/internal/Subscriber.js:103:18)
    at SwitchMapSubscriber.notifyNext (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/rxjs/internal/operators/switchMap.js:122:26)
    at InnerSubscriber._next (/home/elclanrs/Documents/ng-packagr-manual-compilation/node_modules/rxjs/internal/InnerSubscriber.js:30:21)

How To Reproduce

1. Clone this repo: https://github.com/elclanrs/ng-packagr-manual-compilation
2. Try compiling a single component with $(npm bin)/ng-packagr -p projects/components/button

Expected Behaviour

I expect the button component to be compiled in the dist folder overriding what was there previously.

Ideally, it would be nice to be able to do ng build components/button or ng build components --entry=button or something like that.

Version Information

ng-packagr:            3.0.1
@angular/compiler:     6.0.3
rollup:                0.59.4
tsickle:               0.27.5
typescript:            2.7.2

[karpoff]

Hi @alan-agius4, Is there any plans to add ability for parallel builds? I have a lot of secondary endpoints and most of them doesn’t depend on each other. Currently every build takes too much time for me

[alan-agius4]

Thanks for this request, but this is currently not planned.