Dual app has duplicate declarations error only with AOT

[zackarychapple]

- [x] bug report -> please search issues before submitting

Versions.

@angular/cli: 1.0.2
node: 7.5.0
os: darwin x64
@angular/common: 4.1.1
@angular/compiler: 4.1.1
@angular/core: 4.1.1
@angular/forms: 4.1.1
@angular/http: 4.1.1
@angular/platform-browser: 4.1.1
@angular/platform-browser-dynamic: 4.1.1
@angular/router: 4.1.1
@angular/cli: 1.0.2
@angular/compiler-cli: 4.1.1

Repro steps.

I created a repo that replicates this issue.

1. Create Second app in .angular-cli.json with unique main file.
2. Create Duplicate of app.module.ts and name it `app2.module.ts
3. Run ng build everything works as expected
4. Run ng build --prod --aot and get the below error:

The log given by the failure.

ERROR in Type AppComponent in /Users/zchapple/code/test/src/app/app.component.ts is part of the declarations of 2 modules: AppModule in /Users/zchapple/code/test/src/app/app.module.ts and AppModule in /Users/zchapple/code/test/src/app/app2.module.ts! Please consider moving AppComponent in /Users/zchapple/code/test/src/app/app.component.ts to a higher module that imports AppModule in /Users/zchapple/code/test/src/app/app.module.ts and AppModule in /Users/zchapple/code/test/src/app/app2.module.ts. You can also create a new NgModule that exports and includes AppComponent in /Users/zchapple/code/test/src/app/app.component.ts then import that NgModule in AppModule in /Users/zchapple/code/test/src/app/app.module.ts and AppModule in /Users/zchapple/code/test/src/app/app2.module.ts.

ERROR in ./src/main.ts
Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in '/Users/zchapple/code/test/src'
 @ ./src/main.ts 4:0-74
 @ multi ./src/main.ts

Desired functionality.

Expected behavior is that the apps should be evaluated independently for duplicate module AOT checks.

[veke]

If multiple apps and --app appname is used which has different main.ts entry point (which imports different module that imports same components) will give build error with --aot
error in Type AppComponent ... is part of the declarations of 2 modules

[veke]

Any news on this?
@hansl

[manuelhuber]

This is a major issues and prevents us from using Component Lab (but there is a workaround, see this)

[veke]

#8031

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