AOT build of application fails when uses re-export in entryComponents

Type of Issue

[x ] Bug Report
[ ] Feature Request

Description

When uses re-export to define entryComponents for NgModule AOT build of end application fails. It seems that ng-packagr does not write type infomation to *metadata.json files.

How To Reproduce

/components/my-component.ts

@Component(..) export class MyComponent { }

/components/index.ts:

export {MyComponent} from "./my-component";

/module.ts:

import {MyComponent} from "./components";
@NgModule({
  ...
  entryComponents: [
    // entry here
    MyComponent
  ]
})
export class MyModule {}

Angular compilier fail to build application that uses library. If I use direct import in the module, like import {MyComponent} from "./components/my-component", error is gone.

Angular compilier error:

ERROR in TypeError: Cannot read property 'members' of undefined
    at AotSummaryResolver.resolveSummary (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:32817:56)
    at CompileMetadataResolver._loadSummary (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:14837:66)
    at CompileMetadataResolver._getEntryComponentMetadata (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:15895:66)
    at C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:15361:55
    at Array.map (<anonymous>)
    at CompileMetadataResolver.getNgModuleMetadata (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:15361:18)
    at C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:31325:70
    at Array.forEach (<anonymous>)
    at analyzeFile (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:31308:53)
    at AotCompiler._analyzeFile (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:30510:17)
    at AotCompiler.findGeneratedFileNames (C:\Git\stream-webapp\node_modules\@angular\compiler\bundles\compiler.umd.js:30526:42)
    at Object.findGeneratedFileNames (C:\Git\stream-webapp\packages\compiler-cli\src\transformers\program.ts:434:60)
    at TsCompilerAotCompilerTypeCheckHostAdapter.getSourceFile (C:\Git\stream-webapp\packages\compiler-cli\src\transformers\compiler_host.ts:384:45)
    at findSourceFile (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:73056:29)
    at processImportedModules (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:73228:25)
    at findSourceFile (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:73104:17)
    at args (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72993:85)
    at getSourceFileFromReferenceWorker (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72966:34)
    at processSourceFile (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72993:13)
    at processRootFile (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72848:13)
    at C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72006:60
    at Object.forEach (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:1526:30)
    at Object.createProgram (C:\Git\stream-webapp\node_modules\typescript\lib\typescript.js:72006:16)
    at AngularCompilerProgram._createProgramWithBasicStubs (C:\Git\stream-webapp\packages\compiler-cli\src\transformers\program.ts:482:27)
    at C:\Git\stream-webapp\packages\compiler-cli\src\transformers\program.ts:182:17
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:118:7)
    at Function.Module.runMain (module.js:692:11)
    at startup (bootstrap_node.js:194:16)
    at bootstrap_node.js:666:3

Version Information

$ node_modules/.bin/ng-packagr --version
ng-packagr: 2.4.1
@angular/*: 5.2.3
typescript: 2.6.2
rxjs: 5.5.6
node: 9.8.0
npm/yarn: 5.7.1

[benwinding]

Barrel files are the problem in my case…

index.ts = 👎

[bukharin]

@alan-agius4 sure.

I found this promblem not only for entryComponents, but for all imports from re-export modules (like index.ts).

When I use direct import like import {MyComponent} from "./components/my-component/my-component.ts" - metadata.json file contains metadata required for angular compilier-cli.

I try to describe the difference of created metadata.json files:

my-module.metadata.json:

{
  "metadata": {
    "MyModule": {
      "__symbolic": "class",
      "decorators": [
        {
          // ...
          "arguments": [
            {
              // decorator parameters
              "entryComponents": [
                {
                  "__symbolic": "reference",
                  "name": "ɵi"
                }
                // other components
              ]
            }
          ]
        }
      ]
      // ...
    },
    // metadata for ɵi reference
    "ɵi": {
      "__symbolic": "class",
      "decorators": [
        // ...
      ],
      "members": {
        // ...
      }
    }
  }
}

But when I has import like import {MyComponent} from "./components" metadata.json file looks like:

{
  "metadata": {
    "MyModule": {
      "__symbolic": "class",
      "decorators": [
        {
          // ...
          "arguments": [
            {
              // decorator parameters
              "entryComponents": [
                {
                  "__symbolic": "reference",
                  "name": "ɵi"
                }
                // other components
              ]
            }
          ]
        }
      ]
      // ...
    },
    // no metadata for ɵi reference
  }
}

During AOT compilier does not receive any information of used type and throw exception above