🐞 Bug report

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Is this a regression?

I'm not sure. Upgraded to angular 11 almost together with getting the issue - might be.

Description

I maintain a set of libraries to work with gRPC from Angular, here is the link: https://github.com/ngx-grpc/ngx-grpc

The lib includes 6 libs (located in packages):

• one non-angular (however located between angular apps, just is not present in angular.json) - protoc plugin - protoc-gen-ng
• 4 normal angular libs
• 1 angular lib; built using Angular toolset but is used inside a web worker - worker.

There is also examples directory served as example and, well, as a test reference that all goes fine. This example uses all the libs, and this is the place where the error is happening.

Now I added a module with forRoot / forChild in some of the angular libraries: core (2 modules), grpc-web-client (1 module) and worker-client (1 module). All modules and libs are working fine, all, but the latter one. It is just not processed by ngcc. When I start the application I see the following:

Compiling @ngx-grpc/common : es2015 as esm2015

Compiling @ngx-grpc/core : es2015 as esm2015

Compiling @ngx-grpc/- removing all references to the `Worker` type () : es2015 as esm2015

Compiling @ngx-grpc/well-known-types : es2015 as esm2015

Compiling @ngx-grpc/worker : es2015 as esm2015

Compiling @ngx-grpc/worker-client : es2015 as esm2015

So, the ngcc reaches the library, but the directory __ivy_ngcc__ is not created in dist/worker-client, however for all other modules it is created. The outcome is that the latter library does not work.

What I tried:

• removing all references to the Worker type from worker-client - did not help
• checking angular config, including angular.json, tsconfigs and ng-packagr - did not help, it is totally equal to the working lib grpc-web-client
• regenerated the lib from scratch - did not help
• removed references to worker library from worker-client - did not help
• moved code from worker-client to grpc-web-client lib. This made the code work, meaning that the grpc-web-client had no problems with ngcc; and I can use the code in the example and it works just fine. However, I cannot get more out of it; I still need the code in a separate package. This also means that code is valid and it can be compiled by ngcc, but for some reason when it's in its own package it does not.

What is also very weird - I would not be surprised if I had problems with worker library; it's built by Angular and used in Worker. And I have a feeling it can be connected to the issue.

I don't know what / where else to dig. The issue is driving me crazy. It seems unlogical to me and I cannot find the reason.

Please help me out.

🔬 Minimal Reproduction

• Clone https://github.com/ngx-grpc/ngx-grpc
• Switch to develop branch
• npm ci
• npm run build - builds the libs
• npm run examples - produces the error after ngcc compiler

🔥 Exception or Error

    Error: dist/worker-client/lib/grpc-worker-client.module.d.ts:11:22 - error NG6002: Appears in the NgModule.imports of GrpcWorkerClientExampleModule, but could not be resolved to an NgModule class.
    
    This likely means that the dependency (@ngx-grpc/worker-client) which declares GrpcWorkerClientModule has not been processed correctly by ngcc.
    
    11 export declare class GrpcWorkerClientModule {

🌍 Your Environment

Angular CLI: 11.0.2
Node: 14.5.0
OS: darwin x64

Angular: 11.0.2
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1100.2
@angular-devkit/build-angular   0.1100.2
@angular-devkit/core            11.0.2
@angular-devkit/schematics      11.0.2
@angular/cdk                    11.0.0
@angular/material               11.0.0
@schematics/angular             11.0.2
@schematics/update              0.1100.2
ng-packagr                      11.0.3
rxjs                            6.6.3
typescript                      4.0.5

Anything else relevant?

I'm not sure wheher the issue belongs to @angular/cli, please feel free to locate it properly in case it's necessary